<PAGE>


                                                                    Exhibit 10.1

                                   CREDIT AGREEMENT

    THIS AGREEMENT is entered into as of July 16, 1997, by and between ROTONICS
MANUFACTURING INC., a Delaware corporation ("Borrower"), and WELLS FARGO BANK,
NATIONAL ASSOCIATION ("Bank").


                                       RECITAL

    Borrower has requested from Bank the credit accommodations described below
(each, a "Credit" and collectively, the "Credits"), and Bank has agreed to
provide the Credits to Borrower on the terms and conditions contained herein.

    NOW, THEREFORE, for valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, Bank and Borrower hereby agree as follows:


                                      ARTICLE I
                                     THE CREDITS

    SECTION 1.1.   LINE OF CREDIT.

    (a)   LINE OF CREDIT.  Subject to the terms and conditions of this
Agreement, Bank hereby agrees to make advances to Borrower from time to time up
to and including July 15, 1999, not to exceed at any time the aggregate
principal amount of Five Million Dollars ($5,000,000.00) ("Line of Credit"), the
proceeds of which shall be used for Borrower s working capital.  Borrower's
obligation to repay advances under the Line of Credit shall be evidenced by a
promissory note substantially in the form of Exhibit A attached hereto ("Line of
Credit Note"), all terms of which are incorporated herein by this reference.

    (b)   BORROWING AND REPAYMENT.  Borrower may from time to time during the
term of the Line of Credit borrow, partially or wholly repay its outstanding
borrowings, and reborrow, subject to all of the limitations, terms and
conditions contained herein or in the Line of Credit Note; provided however,
that the total outstanding borrowings under the Line of Credit shall not at any
time exceed the maximum principal amount available thereunder, as set forth
above.

    SECTION 1.2.   TERM COMMITMENT.

    (a)   TERM COMMITMENT.  Subject to the terms and conditions of this
Agreement, Bank hereby agrees to make advances to Borrower from time to time up
to and including July 15, 1998, not to exceed the aggregate principal amount of
One Million Two Hundred Thousand Dollars ($1,200,000.00) ("Term Commitment"),
the proceeds of which shall be used for equipment purchases, and which shall be
converted on July 16, 1998, to a term loan, as described more fully below.
Borrower's obligation to repay advances under the Term Commitment shall be
evidenced by a promissory note substantially in the form of Exhibit B attached
hereto ("Term Commitment Note"), all terms of which are incorporated herein by
this reference.


<PAGE>

    (b)   LIMITATION ON BORROWINGS.  Notwithstanding any other provision of
this Agreement, the aggregate amount of all outstanding borrowings under the
Term Commitment shall not at any time exceed a maximum of eighty percent (80%)
of the cost of each item of new equipment purchased with the proceeds thereof or
seventy-five percent (75%) of the cost of each item of used equipment purchased
with proceeds thereof, as evidenced by the seller s invoice.

    (c)   BORROWING AND REPAYMENT.  Borrower may from time to time during the
period in which Bank will make advances under the Term Commitment borrow and
partially or wholly repay its outstanding borrowings, provided that amounts
repaid may not be reborrowed, subject to all the limitations, terms and
conditions contained herein; provided however, that the total outstanding
borrowings under the Term Commitment shall not exceed the maximum principal
amount available thereunder, as set forth above.  The principal amount of the
Term Commitment shall be repaid in accordance with the provisions of the Term
Commitment Note.

    (d)   PREPAYMENT.  Borrower may prepay principal on the Term Commitment
solely in accordance with the provisions of the Term Commitment Note.

    SECTION 1.3.   TERM LOAN A.

    (a)   TERM LOAN A.  Bank has made a loan to Borrower in the original
principal amount of One Million Dollars ($1,000,000.00) ("Term Loan A"), on
which the outstanding principal balance as of the date hereof is $1,000,000.00.
Borrower's obligation to repay Term Loan A is evidenced by a promissory note in
the form of Exhibit C attached hereto ("Term A Note"), all terms of which are
incorporated herein by this reference.  Subject to the terms and conditions of
this Agreement, Bank hereby confirms that Term Loan A remains in full force and
effect.  Any reference in the Term A Note to any prior loan agreement between
Bank and Borrower shall be deemed a reference to this Agreement.

    (b)   REPAYMENT.  The principal amount of Term Loan A shall be repaid in
accordance with the provisions of the Term A Note.

    (c)   PREPAYMENT. Borrower may prepay principal on Term Loan A solely in
accordance with the provisions of the Term A Note.

    SECTION 1.4.   TERM LOAN B.

    (a)   TERM LOAN B.  Bank has made a loan to Borrower in the original
principal amount of One Million Three Hundred Thirty Thousand Dollars
($1,330,000.00) ("Term Loan B"), on which the outstanding principal balance as
of the date hereof is $1,141,583.22.  Borrower's obligation to repay Term Loan B
is evidenced by a promissory note in the form of Exhibit D attached hereto
("Term B Note"), all terms of which are incorporated herein by this reference.
Subject to the terms and conditions of this Agreement, Bank hereby confirms that
Term Loan B remains in full force and effect.  Any reference in the Term B Note
to any prior loan agreement between Bank and Borrower shall be deemed a
reference to this Agreement.

    (b)   REPAYMENT.  The principal amount of Term Loan B shall be repaid in
accordance with the provisions of the Term B Note.


                                         -2-
<PAGE>

    (c)   PREPAYMENT.  Borrower may prepay principal on Term Loan B at any
time, in any amount and without penalty.  All prepayments of principal shall be
applied on the most remote principal installment or installments then unpaid.

    SECTION 1.5.   TERM LOAN C.

    (a)   TERM LOAN C.  Bank has made a loan to Borrower in the original
principal amount of Four Million Dollars ($4,000,000.00) ("Term Loan C"), on
which the outstanding principal balance as of the date hereof is $2,266,658.00.
Borrower's obligation to repay Term Loan C is evidenced by a promissory note in
the form of Exhibit E attached hereto ("Term C Note"), all terms of which are
incorporated herein by this reference.  Subject to the terms and conditions of
this Agreement, Bank hereby confirms that Term Loan C remains in full force and
effect.  Any reference in the Term C Note to any prior loan agreement between
Bank and Borrower shall be deemed a reference to this Agreement.

    (b)   REPAYMENT.  The principal amount of Term Loan C shall be repaid in
accordance with the provisions of the Term C Note.

    (c)   PREPAYMENT. Borrower may prepay principal on Term Loan C solely in
accordance with the provisions of the Term C Note.

    SECTION 1.6.   TERM LOAN D.

    (a)   TERM LOAN D.  Bank granted a term commitment to Borrower in the
original principal amount of Five Hundred Thousand Dollars ($500,000.00), which
has been fully disbursed ("Term Loan D"), and on which the outstanding principal
balance as of the date hereof is $383,324.00.  Borrower's obligation to repay
Term Loan D is evidenced by a promissory note in the form of Exhibit F attached
hereto ("Term D Note"), all terms of which are incorporated herein by this
reference.  Subject to the terms and conditions of this Agreement, Bank hereby
confirms that Term Loan D remains in full force and effect.  Any reference in
the Term D Note to any prior loan agreement between Bank and Borrower shall be
deemed a reference to this Agreement.

    (b)   REPAYMENT.  The principal amount of Term Loan D shall be repaid in
accordance with the provisions of the Term D Note.

    (c)   PREPAYMENT. Borrower may prepay principal on Term Loan D solely in
accordance with the provisions of the Term D Note.

    SECTION 1.7.   TERM LOAN E.

    (a)   TERM LOAN E.  Bank has made a loan to Borrower in the original
principal amount of Five Hundred Thousand Dollars ($500,000.00) ("Term Loan E"),
on which the outstanding principal balance as of the date hereof is $483,050.84.
Borrower's obligation to repay Term Loan E is evidenced by a promissory note in
the form of Exhibit G attached hereto ("Term E Note"), all terms of which are
incorporated herein by this reference.  Subject to the terms and conditions of
this Agreement, Bank hereby confirms that Term Loan E remains in full force and
effect.  Any reference in the Term Note E to any prior loan agreement between
Bank and Borrower shall be deemed a reference to this Agreement.


                                         -3-
<PAGE>

    (b)   REPAYMENT.  The principal amount of Term Loan E shall be repaid in
accordance with the provisions of the Term E Note.

    (c)   PREPAYMENT.  Borrower may prepay principal on Term Loan E at any
time, in any amount and without penalty.  All prepayments of principal shall be
applied on the most remote principal installment or installments then unpaid.

    SECTION 1.8.   INTEREST/FEES.

    (a)   INTEREST.      The outstanding principal balances of the  shall bear
interest at the rates of interest set forth in the Line of Credit Note, the Term
Commitment Note, the Term A Note, the Term B Note, the Term C Note, the Term D
Note and the Term E Note (Collectively, the "Notes").

    (b)   COMPUTATION AND PAYMENT.  Interest shall be computed on the basis of
a 360-day year, actual days elapsed.  Interest shall be payable at the times and
place set forth in the Notes.

    (c)   COMMITMENT FEE.  Borrower shall pay to Bank a non-refundable
commitment fee for the Line of Credit equal to $6,250.00, which fee shall be due
and payable in full upon the execution of this Agreement.


    SECTION 1.9.   COLLECTION OF PAYMENTS.  Borrower authorizes Bank to collect
all principal, interest and fees due under each Credit by charging Borrower's
demand deposit account number 4624-074191 with Bank, or any other demand deposit
account maintained by Borrower with Bank, for the full amount thereof.  Should
there be insufficient funds in any such demand deposit account to pay all such
sums when due, the full amount of such deficiency shall be immediately due and
payable by Borrower.

    SECTION 1.10.  COLLATERAL.

    As security for all indebtedness of Borrower to Bank subject hereto,
Borrower hereby grants to Bank security interests of first priority in all
Borrower's accounts receivable, other rights to payment and general intangibles,
inventory and equipment.

    As additional security for Term Loan B, Borrower hereby grants to Bank a
lien of first priority on that certain real property located at 736-738 and
740-746 Birginal Drive, Bensenville, Illinois 60106.

    All of the foregoing shall be evidenced by and subject to the terms of such
security agreements, financing statements, deeds of trust and other documents as
Bank shall reasonably require, all in form and substance satisfactory to Bank.
Borrower shall reimburse Bank immediately upon demand for all costs and expenses
incurred by Bank in connection with any of the foregoing security, including
without limitation, filing and recording fees and costs of appraisals, audits
and title insurance.


                                      ARTICLE II
                            REPRESENTATIONS AND WARRANTIES


                                         -4-
<PAGE>

    Borrower makes the following representations and warranties to Bank, which
representations and warranties shall survive the execution of this Agreement and
shall continue in full force and effect until the full and final payment, and
satisfaction and discharge, of all obligations of Borrower to Bank subject to
this Agreement.

    SECTION 2.1.   LEGAL STATUS.  Borrower is a corporation, duly organized and
existing and in good standing under the laws of the state of Delaware, and is
qualified or licensed to do business (and is in good standing as a foreign
corporation, if applicable) in all jurisdictions in which such qualification or
licensing is required or in which the failure to so qualify or to be so licensed
could have a material adverse effect on Borrower.

    SECTION 2.2.   AUTHORIZATION AND VALIDITY.  This Agreement, the Notes, and
each other document, contract and instrument required hereby or at any time
hereafter delivered to Bank in connection herewith (collectively, the "Loan
Documents") have been duly authorized, and upon their execution and delivery in
accordance with the provisions hereof will constitute legal, valid and binding
agreements and obligations of Borrower or the party which executes the same,
enforceable in accordance with their respective terms.

    SECTION 2.3.   NO VIOLATION.  The execution, delivery and performance by
Borrower of each of the Loan Documents do not violate any provision of any law
or regulation, or contravene any provision of the Articles of Incorporation or
By-Laws of Borrower, or result in any breach of or default under any contract,
obligation, indenture or other instrument to which Borrower is a party or by
which Borrower may be bound.

    SECTION 2.4.   LITIGATION.  There are no pending, or to the best of
Borrower's knowledge threatened, actions, claims, investigations, suits or
proceedings by or before any governmental authority, arbitrator, court or
administrative agency which could have a material adverse effect on the
financial condition or operation of Borrower other than those disclosed by
Borrower to Bank in writing prior to the date hereof.

    SECTION 2.5.   CORRECTNESS OF FINANCIAL STATEMENT.  The financial statement
of Borrower dated March 31, 1997, a true copy of which has been delivered by
Borrower to Bank prior to the date hereof, (a) is complete and correct and
presents fairly the financial condition of Borrower, (b) discloses all
liabilities of Borrower that are required to be reflected or reserved against
under generally accepted accounting principles, whether liquidated or
unliquidated, fixed or contingent, and (c) has been prepared in accordance with
generally accepted accounting principles consistently applied.  Since the date
of such financial statement there has been no material adverse change in the
financial condition of Borrower, nor has Borrower mortgaged, pledged, granted a
security interest in or otherwise encumbered any of its assets or properties
except in favor of Bank or as otherwise permitted by Bank in writing.

    SECTION 2.6.   INCOME TAX RETURNS.  Borrower has no knowledge of any
pending assessments or adjustments of its income tax payable with respect to any
year.

    SECTION 2.7.   NO SUBORDINATION.  There is no agreement, indenture,
contract or instrument to which Borrower is a party or by which Borrower may be
bound that requires the subordination in right of payment of any of Borrower's
obligations subject to this Agreement to any other obligation of Borrower.


                                         -5-
<PAGE>

    SECTION 2.8.   PERMITS, FRANCHISES.  Borrower possesses, and will hereafter
possess, all permits, consents, approvals, franchises and licenses required and
rights to all trademarks, trade names, patents, and fictitious names, if any,
necessary to enable it to conduct the business in which it is now engaged in
compliance with applicable law.

    SECTION 2.9.   ERISA.  Borrower is in compliance in all material respects
with all applicable provisions of the Employee Retirement Income Security Act of
1974, as amended or recodified from time to time ("ERISA"); Borrower has not
violated any provision of any defined employee pension benefit plan (as defined
in ERISA) maintained or contributed to by Borrower (each, a "Plan"); no
Reportable Event as defined in ERISA has occurred and is continuing with respect
to any Plan initiated by Borrower; Borrower has met its minimum funding
requirements under ERISA with respect to each Plan; and each Plan will be able
to fulfill its benefit obligations as they come due in accordance with the Plan
documents and under generally accepted accounting principles.

    SECTION 2.10.  OTHER OBLIGATIONS.  Borrower is not in default on any
obligation for borrowed money, any purchase money obligation or any other
material lease, commitment, contract, instrument or obligation.

    SECTION 2.11.  ENVIRONMENTAL MATTERS.  Except as disclosed by Borrower to
Bank in writing prior to the date hereof, Borrower is in compliance in all
material respects with all applicable federal or state environmental, hazardous
waste, health and safety statutes, and any rules or regulations adopted pursuant
thereto, which govern or affect any of Borrower's operations and/or properties,
including without limitation, the Comprehensive Environmental Response,
Compensation and Liability Act of 1980, the Superfund Amendments and
Reauthorization Act of 1986, the Federal Resource Conservation and Recovery Act
of 1976, and the Federal Toxic Substances Control Act, as any of the same may be
amended, modified or supplemented from time to time.  None of the operations of
Borrower is the subject of any federal or state investigation evaluating whether
any remedial action involving a material expenditure is needed to respond to a
release of any toxic or hazardous waste or substance into the environment.
Borrower has no material contingent liability in connection with any release of
any toxic or hazardous waste or substance into the environment.

    SECTION 2.12.  REAL PROPERTY COLLATERAL.  Except as disclosed by Borrower
to Bank in writing prior to the date hereof, with respect to any real property
collateral required hereby:

    (a)   All taxes, governmental assessments, insurance premiums, and water,
sewer and municipal charges, and rents (if any) which previously became due and
owing in respect thereof have been paid as of the date hereof.

    (b)   There are no mechanics' or similar liens or claims which have been
filed for work, labor or material (and no rights are outstanding that under law
could give rise to any such lien) which affect all or any interest in any such
real property and which are or may be prior to or equal to the lien thereon in
favor of Bank.

    (c)   None of the improvements which were included for purpose of
determining the appraised value of any such real property lies outside of the
boundaries and/or


                                         -6-
<PAGE>

building restriction lines thereof, and no improvements on adjoining properties
materially encroach upon any such real property.

    (d)   There is no pending, or to the best of Borrower's knowledge
threatened, proceeding for the total or partial condemnation of all or any
portion of any such real property, and all such real property is in good repair
and free and clear of any damage that would materially and adversely affect the
value thereof as security and/or the intended use thereof.



                                     ARTICLE III
                                      CONDITIONS

    SECTION 3.1.   CONDITIONS OF INITIAL EXTENSION OF CREDIT.  The obligation
of Bank to grant any of the Credits is subject to the fulfillment to Bank's
satisfaction of all of the following conditions:

    (a)   APPROVAL OF BANK COUNSEL.  All legal matters incidental to the
granting of each of the Credits shall be satisfactory to Bank's counsel.

    (b)   DOCUMENTATION.  Bank shall have received, in form and substance
satisfactory to Bank, each of the following, duly executed:

     (i)  This Agreement and the Notes.
    (ii)  Corporate Borrowing Resolution.
   (iii)  Certificate of Incumbency.
    (iv)  Security Agreement: Equipment.
     (v)  Continuing Security Agreement: Rights to Payment and Inventory.
    (vi)  UCC-1 Financing Statements.
   (vii)  Mortgage and Assignment of Rents and Leases.
  (viii)  Such other documents as Bank may require under any other Section of
this Agreement.

    (c)   FINANCIAL CONDITION.  There shall have been no material adverse
change, as determined by Bank, in the financial condition or business of
Borrower, nor any material decline, as determined by Bank, in the market value
of any collateral required hereunder or a substantial or material portion of the
assets of Borrower.

    (d)   INSURANCE.  Borrower shall have delivered to Bank evidence of
insurance coverage on all Borrower's property, in form, substance, amounts,
covering risks and issued by companies satisfactory to Bank, and where required
by Bank, with loss payable endorsements in favor of Bank, including without
limitation, policies of fire and extended coverage insurance covering all real
property collateral required hereby, with replacement cost and mortgagee loss
payable endorsements, and such policies of insurance against specific hazards
affecting any such real property as may be required by governmental regulation
or Bank.

    (e)   APPRAISALS.  Bank shall have obtained, at Borrower's cost, an
appraisal of all real property collateral required hereby, and all improvements
thereon, issued by an appraiser acceptable to Bank and in form, substance and
reflecting values satisfactory to Bank, in its discretion.


                                         -7-
<PAGE>

    (f)   TITLE INSURANCE.  Bank shall have received an ALTA Policy of Title
Insurance, with such endorsements as Bank may require, issued by a company and
in form and substance satisfactory to Bank, in such amount as Bank shall
require, insuring Bank's lien on the real property collateral required hereby to
be of first priority, subject only to such exceptions as Bank shall approve in
its discretion, with all costs thereof to be paid by Borrower.

    (g)   TAX SERVICE CONTRACT.  Borrower shall have procured and delivered to
Bank, at Borrower's cost, such tax service contract as Bank shall require for
any real property collateral required hereby, to remain in effect as long as
such real property secures any obligations of Borrower to Bank as required
hereby.

    SECTION 3.2.   CONDITIONS OF EACH EXTENSION OF CREDIT.  The obligation of
Bank to make each extension of credit requested by Borrower hereunder shall be
subject to the fulfillment to Bank's satisfaction of each of the following
conditions:

    (a)   COMPLIANCE.  The representations and warranties contained herein and
in each of the other Loan Documents shall be true on and as of the date of the
signing of this Agreement and on the date of each extension of credit by Bank
pursuant hereto, with the same effect as though such representations and
warranties had been made on and as of each such date, and on each such date, no
Event of Default as defined herein, and no condition, event or act which with
the giving of notice or the passage of time or both would constitute such an
Event of Default, shall have occurred and be continuing or shall exist.

    (b)   DOCUMENTATION.  Bank shall have received all additional documents
which may be required in connection with such extension of credit.


                                      ARTICLE IV
                                AFFIRMATIVE COVENANTS

    Borrower covenants that so long as Bank remains committed to extend credit
to Borrower pursuant hereto, or any liabilities (whether direct or contingent,
liquidated or unliquidated) of Borrower to Bank under any of the Loan Documents
remain outstanding, and until payment in full of all obligations of Borrower
subject hereto, Borrower shall, unless Bank otherwise consents in writing:

    SECTION 4.1.   PUNCTUAL PAYMENTS.  Punctually pay all principal, interest,
fees or other liabilities due under any of the Loan Documents at the times and
place and in the manner specified therein, and immediately upon demand by Bank,
the amount by which the outstanding principal balance of any of the Credits at
any time exceeds any limitation on borrowings applicable thereto.

    SECTION 4.2.   ACCOUNTING RECORDS.  Maintain adequate books and records in
accordance with generally accepted accounting principles consistently applied,
and permit any representative of Bank, at any reasonable time, to inspect, audit
and examine such books and records, to make copies of the same, and to inspect
the properties of Borrower.



                                         -8-
<PAGE>

    SECTION 4.3.   FINANCIAL STATEMENTS.  Provide to Bank all of the following,
in form and detail satisfactory to Bank:

    (a)   not later than 120 days after and as of the end of each fiscal year,
an audited financial statement of Borrower, prepared by a certified public
accountant acceptable to Bank, to include all schedules, notes and narratives
reasonably included in Borrower s 10K;

    (b)   not later than 45 days after and as of the end of each fiscal
quarter, a financial statement of Borrower, prepared by a certified public
accountant acceptable to Bank, to include all schedules, notes and narratives
reasonably included in Borrower s 10Q;

    (c)   from time to time such other information as Bank may reasonably
request.

    SECTION 4.4.   COMPLIANCE.  Preserve and maintain all licenses, permits,
governmental approvals, rights, privileges and franchises necessary for the
conduct of its business; and comply with the provisions of all documents
pursuant to which Borrower is organized and/or which govern Borrower's continued
existence and with the requirements of all laws, rules, regulations and orders
of any governmental authority applicable to Borrower and/or its business.

    SECTION 4.5.   INSURANCE.  Maintain and keep in force insurance of the
types and in amounts customarily carried in lines of business similar to that of
Borrower, including but not limited to fire, extended coverage, public
liability, flood, property damage and workers' compensation, with all such
insurance carried with companies and in amounts satisfactory to Bank, and
deliver to Bank from time to time at Bank's request schedules setting forth all
insurance then in effect.

    SECTION 4.6.   FACILITIES.  Keep all properties useful or necessary to
Borrower's business in good repair and condition, and from time to time make
necessary repairs, renewals and replacements thereto so that such properties
shall be fully and efficiently preserved and maintained.

    SECTION 4.7.   TAXES AND OTHER LIABILITIES.  Pay and discharge when due any
and all indebtedness, obligations, assessments and taxes, both real or personal,
including without limitation federal and state income taxes and state and local
property taxes and assessments, except such (a) as Borrower may in good faith
contest or as to which a bona fide dispute may arise, and (b) for which Borrower
has made provision, to Bank's satisfaction, for eventual payment thereof in the
event Borrower is obligated to make such payment.

    SECTION 4.8.   LITIGATION.  Promptly give notice in writing to Bank of any
litigation pending or threatened against Borrower with a claim in excess of
$100,000.00.


                                         -9-
<PAGE>

    SECTION 4.9.   FINANCIAL CONDITION.  Maintain Borrower's financial
condition as follows using generally accepted accounting principles consistently
applied and used consistently with prior practices (except to the extent
modified by the definitions herein):

    (a)   Current Ratio not at any time less than 1.25 to 1.00, with "Current
Ratio" defined as total current assets divided by total current liabilities.

    (b)   Tangible Net Worth not at any time less than $12,000,000.00, with
"Tangible Net Worth" defined as the aggregate of total stockholders' equity plus
subordinated debt less any intangible assets.

    (c)   Total Liabilities divided by Tangible Net Worth not at any time
greater than 1.25 to 1.00, with "Total Liabilities" defined as the aggregate of
current liabilities and non-current liabilities less subordinated debt, and with
"Tangible Net Worth" as defined above.

    (d)   EBITDA Coverage Ratio not less than 2.0 to 1.0 as of each fiscal
year end and based on a rolling four quarter, with "EBITDA" defined as net
profit before tax plus interest expense (net of capitalized interest expense),
depreciation expense and amortization expense, and with "EBITDA Coverage Ratio"
defined as EBITDA divided by the aggregate of total interest expense plus the
prior period current maturity of long-term debt and the prior period current
maturity of subordinated debt.

    SECTION 4.10.  NOTICE TO BANK.  Promptly (but in no event more than five
(5) days after the occurrence of each such event or matter) give written notice
to Bank in reasonable detail of:  (a) the occurrence of any Event of Default, or
any condition, event or act which with the giving of notice or the passage of
time or both would constitute an Event of Default; (b) any change in the name or
the organizational structure of Borrower; (c) the occurrence and nature of any
Reportable Event or Prohibited Transaction, each as defined in ERISA, or any
funding deficiency with respect to any Plan; or (d) any termination or
cancellation of any insurance policy which Borrower is required to maintain, or
any uninsured or partially uninsured loss through liability or property damage,
or through fire, theft or any other cause affecting Borrower's property in
excess of an aggregate of $50,000.00.


                                      ARTICLE V
                                  NEGATIVE COVENANTS

    Borrower further covenants that so long as Bank remains committed to extend
credit to Borrower pursuant hereto, or any liabilities (whether direct or
contingent, liquidated or unliquidated) of Borrower to Bank under any of the
Loan Documents remain outstanding, and until payment in full of all obligations
of Borrower subject hereto, Borrower will not without Bank's prior written
consent:

    SECTION 5.1.   USE OF FUNDS.  Use any of the proceeds of any of the Credits
except for the purposes stated in Article I hereof.

    SECTION 5.2.   CAPITAL EXPENDITURES.  Make any additional investment in
fixed assets in any fiscal year in excess of an aggregate of $2,000,000.00.


                                         -10-
<PAGE>

    SECTION 5.3.   LEASE EXPENDITURES.  Incur operating lease expense in any
fiscal year in excess of an aggregate of $200,000.00.

    SECTION 5.4.   OTHER INDEBTEDNESS.  Create, incur, assume or permit to
exist any indebtedness or liabilities resulting from borrowings, loans or
advances, whether secured or unsecured, matured or unmatured, liquidated or
unliquidated, joint or several, except (a) the liabilities of Borrower to Bank,
and (b) any other liabilities of Borrower existing as of, and disclosed to Bank
prior to, the date hereof.

    SECTION 5.5.   MERGER, CONSOLIDATION, TRANSFER OF ASSETS.  Merge into or
consolidate with any other entity; make any substantial change in the nature of
Borrower's business as conducted as of the date hereof; acquire all or
substantially all of the assets of any other entity; nor sell, lease, transfer
or otherwise dispose of all or a substantial or material portion of Borrower's
assets except in the ordinary course of its business.

    SECTION 5.6.   GUARANTIES.  Guarantee or become liable in any way as
surety, endorser (other than as endorser of negotiable instruments for deposit
or collection in the ordinary course of business), accommodation endorser or
otherwise for, nor pledge or hypothecate any assets of Borrower as security for,
any liabilities or obligations of any other person or entity, except any of the
foregoing in favor of Bank.

    SECTION 5.7.   LOANS, ADVANCES, INVESTMENTS.  Make any loans or advances to
or investments in any person or entity, except any of the foregoing existing as
of, and disclosed to Bank prior to, the date hereof.

    SECTION 5.8.   DIVIDENDS, DISTRIBUTIONS.  Declare or pay any dividend or
distribution either in cash, stock or any other property on Borrower's stock now
or hereafter outstanding, nor redeem, retire, repurchase or otherwise acquire
any shares of any class of Borrower's stock now or hereafter outstanding.

    SECTION 5.9.   PLEDGE OF ASSETS.  Mortgage, pledge, grant or permit to
exist a security interest in, or lien upon, all or any portion of Borrower's
assets now owned or hereafter acquired, except any of the foregoing in favor of
Bank or which is existing as of, and disclosed to Bank in writing prior to, the
date hereof.


                                      ARTICLE VI
                                  EVENTS OF DEFAULT

    SECTION 6.1.   The occurrence of any of the following shall constitute an
"Event of Default" under this Agreement:

    (a)   Borrower shall fail to pay when due any principal, interest, fees or
other amounts payable under any of the Loan Documents.

    (b)   Any financial statement or certificate furnished to Bank in
connection with, or any representation or warranty made by Borrower or any other
party under this Agreement or any other Loan Document shall prove to be
incorrect, false or misleading in any material respect when furnished or made.


                                         -11-
<PAGE>

    (c)   Any default in the performance of or compliance with any obligation,
agreement or other provision contained herein or in any other Loan Document
(other than those referred to in subsections (a) and (b) above), and with
respect to any such default which by its nature can be cured, such default shall
continue for a period of twenty (20) days from its occurrence.

    (d)   Any default in the payment or performance of any obligation, or any
defined event of default, under the terms of any contract or instrument (other
than any of the Loan Documents) pursuant to which Borrower has incurred any debt
or other liability to any person or entity, including Bank.

    (e)   The filing of a notice of judgment lien against Borrower; or the
recording of any abstract of judgment against Borrower in any county in which
Borrower has an interest in real property; or the service of a notice of levy
and/or of a writ of attachment or execution, or other like process, against the
assets of Borrower; or the entry of a judgment against Borrower.

    (f)   Borrower shall become insolvent, or shall suffer or consent to or
apply for the appointment of a receiver, trustee, custodian or liquidator of
itself or any of its property, or shall generally fail to pay its debts as they
become due, or shall make a general assignment for the benefit of creditors;
Borrower shall file a voluntary petition in bankruptcy, or seeking
reorganization, in order to effect a plan or other arrangement with creditors or
any other relief under the Bankruptcy Reform Act, Title 11 of the United States
Code, as amended or recodified from time to time ("Bankruptcy Code"), or under
any state or federal law granting relief to debtors, whether now or hereafter in
effect; or any involuntary petition or proceeding pursuant to the Bankruptcy
Code or any other applicable state or federal law relating to bankruptcy,
reorganization or other relief for debtors is filed or commenced against
Borrower, or Borrower shall file an answer admitting the jurisdiction of the
court and the material allegations of any involuntary petition; or Borrower
shall be adjudicated a bankrupt, or an order for relief shall be entered against
Borrower by any court of competent jurisdiction under the Bankruptcy Code or any
other applicable state or federal law relating to bankruptcy, reorganization or
other relief for debtors.

    (g)   There shall exist or occur any event or condition which Bank in good
faith believes impairs, or is substantially likely to impair, the prospect of
payment or performance by Borrower of its obligations under any of the Loan
Documents.

    (h)   The dissolution or liquidation of Borrower; or Borrower, or any of
its directors, stockholders or members, shall take action seeking to effect the
dissolution or liquidation of Borrower.

    (i)   Any change in ownership during the term of this Agreement of an
aggregate of twenty-five percent (25%) or more of the common stock of Borrower.

    (j)  The sale, transfer, hypothecation, assignment or encumbrance, whether
voluntary, involuntary or by operation of law, without Bank's prior written
consent, of all or any part of or interest in any real property collateral
required hereby.

    SECTION 6.2.   REMEDIES.  Upon the occurrence of any Event of Default:
(a) all indebtedness of Borrower under each of the Loan Documents, any term
thereof to the contrary notwithstanding, shall at Bank's option and without
notice become immediately


                                         -12-
<PAGE>

due and payable without presentment, demand, protest or notice of dishonor, all
of which are hereby expressly waived by each Borrower; (b) the obligation, if
any, of Bank to extend any further credit under any of the Loan Documents shall
immediately cease and terminate; and (c) Bank shall have all rights, powers and
remedies available under each of the Loan Documents, or accorded by law,
including without limitation the right to resort to any or all security for any
of the Credits and to exercise any or all of the rights of a beneficiary or
secured party pursuant to applicable law.  All rights, powers and remedies of
Bank may be exercised at any time by Bank and from time to time after the
occurrence of an Event of Default, are cumulative and not exclusive, and shall
be in addition to any other rights, powers or remedies provided by law or
equity.


                                     ARTICLE VII
                                    MISCELLANEOUS

    SECTION 7.1.   NO WAIVER.  No delay, failure or discontinuance of Bank in
exercising any right, power or remedy under any of the Loan Documents shall
affect or operate as a waiver of such right, power or remedy; nor shall any
single or partial exercise of any such right, power or remedy preclude, waive or
otherwise affect any other or further exercise thereof or the exercise of any
other right, power or remedy.  Any waiver, permit, consent or approval of any
kind by Bank of any breach of or default under any of the Loan Documents must be
in writing and shall be effective only to the extent set forth in such writing.

    SECTION 7.2.   NOTICES.  All notices, requests and demands which any party
is required or may desire to give to any other party under any provision of this
Agreement must be in writing delivered to each party at the following address:

    BORROWER:  ROTONICS MANUFACTURING INC.
               17022 South Figueroa Street
               Gardena, CA 90248

    BANK:  WELLS FARGO BANK, NATIONAL ASSOCIATION
               South Bay RCBO
                111 W. Ocean Blvd., Suite 300
               Long Beach, CA 90802


or to such other address as any party may designate by written notice to all
other parties.  Each such notice, request and demand shall be deemed given or
made as follows:  (a) if sent by hand delivery, upon delivery; (b) if sent by
mail, upon the earlier of the date of receipt or three (3) days after deposit in
the U.S. mail, first class and postage prepaid; and (c) if sent by telecopy,
upon receipt.

    SECTION 7.3.   COSTS, EXPENSES AND ATTORNEYS' FEES.  Borrower shall pay to
Bank immediately upon demand the full amount of all payments, advances, charges,
costs and expenses, including reasonable attorneys' fees (to include outside
counsel fees and all allocated costs of Bank's in-house counsel), expended or
incurred by Bank in connection with (a) the negotiation and preparation of this
Agreement and the other Loan Documents, Bank's continued administration hereof
and thereof, and the preparation of any amendments and waivers hereto and
thereto, (b) the enforcement of


                                         -13-
<PAGE>

Bank's rights and/or the collection of any amounts which become due to Bank
under any of the Loan Documents, and (c) the prosecution or defense of any
action in any way related to any of the Loan Documents, including without
limitation, any action for declaratory relief, whether incurred at the trial or
appellate level, in an arbitration proceeding or otherwise, and including any of
the foregoing incurred in connection with any bankruptcy proceeding (including
without limitation, any adversary proceeding, contested matter or motion brought
by Bank or any other person) relating to any Borrower or any other person or
entity.

    SECTION 7.4.   SUCCESSORS, ASSIGNMENT.  This Agreement shall be binding
upon and inure to the benefit of the heirs, executors, administrators, legal
representatives, successors and assigns of the parties; provided however, that
Borrower may not assign or transfer its interest hereunder without Bank's prior
written consent.  Bank reserves the right to sell, assign, transfer, negotiate
or grant participations in all or any part of, or any interest in, Bank's rights
and benefits under each of the Loan Documents.  In connection therewith, Bank
may disclose all documents and information which Bank now has or may hereafter
acquire relating to any of the Credits, Borrower or its business, or any
collateral required hereunder.

    SECTION 7.5.   ENTIRE AGREEMENT; AMENDMENT.  This Agreement and the other
Loan Documents constitute the entire agreement between Borrower and Bank with
respect to the Credits and supersede all prior negotiations, communications,
discussions and correspondence concerning the subject matter hereof.  This
Agreement may be amended or modified only in writing signed by each party
hereto.

    SECTION 7.6.   NO THIRD PARTY BENEFICIARIES.  This Agreement is made and
entered into for the sole protection and benefit of the parties hereto and their
respective permitted successors and assigns, and no other person or entity shall
be a third party beneficiary of, or have any direct or indirect cause of action
or claim in connection with, this Agreement or any other of the Loan Documents
to which it is not a party.

    SECTION 7.7.   TIME.  Time is of the essence of each and every provision of
this Agreement and each other of the Loan Documents.

    SECTION 7.8.   SEVERABILITY OF PROVISIONS.  If any provision of this
Agreement shall be prohibited by or invalid under applicable law, such provision
shall be ineffective only to the extent of such prohibition or invalidity
without invalidating the remainder of such provision or any remaining provisions
of this Agreement.

    SECTION 7.9.   COUNTERPARTS.  This Agreement may be executed in any number
of counterparts, each of which when executed and delivered shall be deemed to be
an original, and all of which when taken together shall constitute one and the
same Agreement.

    SECTION 7.10.  GOVERNING LAW.  This Agreement shall be governed by and
construed in accordance with the laws of the State of California.


                                         -14-
<PAGE>

    SECTION 7.11.  ARBITRATION.

    (a)   ARBITRATION.  Upon the demand of any party, any Dispute shall be
resolved by binding arbitration (except as set forth in (e) below) in accordance
with the terms of this Agreement.  A "Dispute" shall mean any action, dispute,
claim or controversy of any kind, whether in contract or tort, statutory or
common law, legal or equitable, now existing or hereafter arising under or in
connection with, or in any way pertaining to, any of the Loan Documents, or any
past, present or future extensions of credit and other activities, transactions
or obligations of any kind related directly or indirectly to any of the Loan
Documents, including without limitation, any of the foregoing arising in
connection with the exercise of any self-help, ancillary or other remedies
pursuant to any of the Loan Documents.  Any party may by summary proceedings
bring an action in court to compel arbitration of a Dispute.  Any party who
fails or refuses to submit to arbitration following a lawful demand by any other
party shall bear all costs and expenses incurred by such other party in
compelling arbitration of any Dispute.

    (b)  GOVERNING RULES.  Arbitration proceedings shall be administered by the
American Arbitration Association ("AAA") or such other administrator as the
parties shall mutually agree upon in accordance with the AAA Commercial
Arbitration Rules.  All Disputes submitted to arbitration shall be resolved in
accordance with the Federal Arbitration Act (Title 9 of the United States Code),
notwithstanding any conflicting choice of law provision in any of the Loan
Documents.  The arbitration shall be conducted at a location in California
selected by the AAA or other administrator.  If there is any inconsistency
between the terms hereof and any such rules, the terms and procedures set forth
herein shall control.  All statutes of limitation applicable to any Dispute
shall apply to any arbitration proceeding.  All discovery activities shall be
expressly limited to matters directly relevant to the Dispute being arbitrated.
Judgment upon any award rendered in an arbitration may be entered in any court
having jurisdiction; provided however, that nothing contained herein shall be
deemed to be a waiver by any party that is a bank of the protections afforded to
it under 12 U.S.C. Section 91 or any similar applicable state law.

    (c)   NO WAIVER; PROVISIONAL REMEDIES, SELF-HELP AND FORECLOSURE.  No
provision hereof shall limit the right of any party to exercise self-help
remedies such as setoff, foreclosure against or sale of any real or personal
property collateral or security, or to obtain provisional or ancillary remedies,
including without limitation injunctive relief, sequestration, attachment,
garnishment or the appointment of a receiver, from a court of competent
jurisdiction before, after or during the pendency of any arbitration or other
proceeding.  The exercise of any such remedy shall not waive the right of any
party to compel arbitration or reference hereunder.

    (d)   ARBITRATOR QUALIFICATIONS AND POWERS; AWARDS.  Arbitrators must be
active members of the California State Bar or retired judges of the state or
federal judiciary of California, with expertise in the substantive laws
applicable to the subject matter of the Dispute.  Arbitrators are empowered to
resolve Disputes by summary rulings in response to motions filed prior to the
final arbitration hearing.  Arbitrators (i) shall resolve all Disputes in
accordance with the substantive law of the state of California, (ii) may grant
any remedy or relief that a court of the state of California could order or
grant within the scope hereof and such ancillary relief as is necessary to make
effective any award, and (iii) shall have the power to award


                                         -15-
<PAGE>

recovery of all costs and fees, to impose sanctions and to take such other
actions as they deem necessary to the same extent a judge could pursuant to the
Federal Rules of Civil Procedure, the California Rules of Civil Procedure or
other applicable law.  Any Dispute in which the amount in controversy is
$5,000,000 or less shall be decided by a single arbitrator who shall not render
an award of greater than $5,000,000 (including damages, costs, fees and
expenses).  By submission to a single arbitrator, each party expressly waives
any right or claim to recover more than $5,000,000.  Any Dispute in which the
amount in controversy exceeds $5,000,000 shall be decided by majority vote of a
panel of three arbitrators; provided however, that all three arbitrators must
actively participate in all hearings and deliberations.

    (e)  JUDICIAL REVIEW.  Notwithstanding anything herein to the contrary, in
any arbitration in which the amount in controversy exceeds $25,000,000, the
arbitrators shall be required to make specific, written findings of fact and
conclusions of law.  In such arbitrations (i) the arbitrators shall not have the
power to make any award which is not supported by substantial evidence or which
is based on legal error, (ii) an award shall not be binding upon the parties
unless the findings of fact are supported by substantial evidence and the
conclusions of law are not erroneous under the substantive law of the state of
California, and (iii) the parties shall have in addition to the grounds referred
to in the Federal Arbitration Act for vacating, modifying or correcting an award
the right to judicial review of (A) whether the findings of fact rendered by the
arbitrators are supported by substantial evidence, and (B) whether the
conclusions of law are erroneous under the substantive law of the state of
California.  Judgment confirming an award in such a proceeding may be entered
only if a court determines the award is supported by substantial evidence and
not based on legal error under the substantive law of the state of California.

    (f)   REAL PROPERTY COLLATERAL; JUDICIAL REFERENCE.  Notwithstanding
anything herein to the contrary, no Dispute shall be submitted to arbitration if
the Dispute concerns indebtedness secured directly or indirectly, in whole or in
part, by any real property unless (i) the holder of the mortgage, lien or
security interest specifically elects in writing to proceed with the
arbitration, or (ii) all parties to the arbitration waive any rights or benefits
that might accrue to them by virtue of the single action rule statute of
California, thereby agreeing that all indebtedness and obligations of the
parties, and all mortgages, liens and security interests securing such
indebtedness and obligations, shall remain fully valid and enforceable.  If any
such Dispute is not submitted to arbitration, the Dispute shall be referred to a
referee in accordance with California Code of Civil Procedure Section 638 et
seq., and this general reference agreement is intended to be specifically
enforceable in accordance with said Section 638.  A referee with the
qualifications required herein for arbitrators shall be selected pursuant to the
AAA's selection procedures.  Judgment upon the decision rendered by a referee
shall be entered in the court in which such proceeding was commenced in
accordance with California Code of Civil Procedure Sections 644 and 645.

    (g)   MISCELLANEOUS.  To the maximum extent practicable, the AAA, the
arbitrators and the parties shall take all action required to conclude any
arbitration proceeding within 180 days of the filing of the Dispute with the
AAA.  No arbitrator or other party to an arbitration proceeding may disclose the
existence, content or results thereof, except for disclosures of information by
a party required in the ordinary course of its business, by applicable law or
regulation, or to the extent necessary to exercise any judicial review rights
set forth herein.  If more than one


                                         -16-
<PAGE>

agreement for arbitration by or between the parties potentially applies to a
Dispute, the arbitration provision most directly related to the Loan Documents
or the subject matter of the Dispute shall control.  This arbitration provision
shall survive termination, amendment or expiration of any of the Loan Documents
or any relationship between the parties.
    IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed as of the day and year first written above.

                                       WELLS FARGO BANK,
ROTONICS MANUFACTURING INC.              NATIONAL ASSOCIATION


By: /s/ Sherman McKinnis               By: /s/ Arvin Chander
    -------------------------              -------------------------
    Sherman McKinnis                       Arvin Chander
    President/Chief                        Vice President
    Executive Officer

By: /s/ Douglas W. Russell
    -------------------------
    Douglas W. Russell
    Chief Financial Officer/
    Assistant Secretary/
    Treasurer



                                         -17-
<PAGE>