Exhibit 1.31

[TRANSLATION]

FIBRENOIRE INC.

(the Corporation)

GENERAL BY-LAWS

BY-LAW ONE

SHAREHOLDERS

ARTICLE 1.
ANNUAL MEETINGS The annual meeting of shareholders of the Corporation shall be held at such place, on such date and at such time as the Board of Directors may determine from time to time. Annual meetings of shareholders may be called at
any time by order of the Board of Directors, the Chairman of the Board or, provided they are directors of the Corporation, the President or any Vice-President.

ARTICLE 2. SPECIAL GENERAL MEETINGS Special general meetings of shareholders shall be held at such place, on such date and at such time as the Board of Directors may determine from time to time or
at any place where all the shareholders of the Corporation entitled to vote thereat are present in person or represented by proxy or at such other place as all the shareholders of the Corporation shall approve in writing.

Special general meetings of shareholders may be called at any time by order of the Board of Directors, the Chairman of the Board or,
provided they are directors of the Corporation, the President or any Vice-President.

ARTICLE 3. NOTICE OF MEETING A notice specifying
the place, date, time and purpose of any meeting of shareholders shall be given to all the shareholders entitled thereto at least 21 days but not more than 60 days prior to the date fixed for the meeting. The notice may be mailed, postage
prepaid, to the shareholders at their respective addresses as they appear on the books of the Corporation or delivered by hand or transmitted by any means of telecommunication.

If the convening of a meeting of shareholders is a matter of urgency, notice of such meeting may be given not less than 48 hours before
such meeting is to be held.

In the case of joint holders of a share, the notice of meeting shall be given to that one of them
whose name stands first in the books of the Corporation and notice so given shall be sufficient notice to all the joint holders.



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Irregularities in the notice or in the giving thereof as well as the unintentional omission
to give notice to, or the non-receipt of any such notice by, any of the shareholders shall not invalidate any action taken by or at any such meeting.

ARTICLE 4. CHAIRMAN The Chairman of the Board or, in his absence, the President, if he is a director, or, in his absence, one of the Vice-Presidents who is a director of the Corporation (to be
designated by the meeting in the event of more than one such Vice-President being present) shall preside at all meetings of shareholders. If all of the aforesaid officers be absent or decline to act, the persons present and entitled to vote may
choose one of their number to act as chairman of the meeting. In the event of an equality of votes, the chairman of any meeting shall not be entitled to a casting vote in respect of any matter submitted to the vote of the meeting.

ARTICLE 5. QUORUM, VOTING AND ADJOURNMENTS The holder or holders of not less than 50% of the outstanding shares of the share capital of the
Corporation carrying voting rights at such meeting, present in person or represented by proxy, shall constitute a quorum for any meeting of shareholders of the Corporation.

The acts of the holders of a majority of the shares so present or represented and carrying voting rights thereat shall be the acts of all the shareholders except as to matters on which the vote or consent
of the holders of a greater number of shares is required or directed by the laws governing the Corporation, the constituting act or the by-laws of the Corporation.

Should a quorum not be present at any meeting of shareholders, those present in person and entitled to be counted for the purpose of forming a quorum shall have power to adjourn the meeting from time to
time and from place to place without notice other than announcement at the meeting until a quorum shall be present. At any such adjourned meeting, provided a quorum is present, any business may be transacted which might have been transacted at
the meeting adjourned.

ARTICLE 6. RIGHT TO VOTE AND PROXY At all meetings of shareholders, each shareholder present and entitled to
vote thereat shall have on a show of hands one vote and, upon a poll, each shareholder present in person or represented by proxy shall be entitled to one vote for each share carrying voting rights registered in his name in the books of the
Corporation unless, under the terms of the constituting act some other scale of voting is fixed, in which event such scale of voting shall be adopted. Any shareholder or proxy may demand a ballot (either before or on the declaration of the
result of a vote upon a show of hands) in respect of any matter submitted to the vote of the shareholders.



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In the case of joint holders of a share, the vote of the senior who tenders a vote, whether
in person or by proxy, shall be accepted to the exclusion of the votes of the other joint holders, and for this purpose seniority shall be determined by the order in which the names stand in the books of the Corporation.

ARTICLE 7. SCRUTINEERS The chairman at any meeting of shareholders may appoint one or more persons, who need not be shareholders, to act as
scrutineer or scrutineers at the meeting.

ARTICLE 8. ADDRESSESOFSHAREHOLDERS Every shareholder
shall furnish to the Corporation an address to which all notices intended for such shareholder shall be given, failing which, any such notice may be given to him at any other address appearing on the books of the Corporation. If no address
appears on the books of the Corporation, such notice may be sent to such address as the person sending the notice may consider to be the most likely to result in such notice promptly reaching such shareholder.

BY-LAW TWO

BOARD OF DIRECTORS

ARTICLE 1. ELECTION OF DIRECTORS AND TERM OF OFFICE Except as herein otherwise provided, each director shall be elected at an annual meeting of
shareholders or at any special general meeting of shareholders called for that purpose, by a majority of the votes cast in respect of such election. It shall not be necessary that the voting for the election of directors of the Corporation be
conducted by ballot unless voting by ballot is requested by a shareholder or proxy. Each director so elected shall hold office until the election of his successor unless he shall resign or his office become vacant by death, removal or other
cause.

ARTICLE 2. ACTS OF DIRECTORS All acts done by the directors or by any person acting as a director, until their successors have
been duly elected or appointed, shall, notwithstanding that it be afterwards discovered that there was some defect in the election of the directors or such person acting as aforesaid or that they or any of them were disqualified, be as valid as if
the directors or such other person, as the case may be, had been duly elected and were qualified to be directors of the Corporation.

ARTICLE
3. POWER TO ALLOT STOCK AND GRANT OPTIONS Subject to the provisions of the constituting act of the Corporation, the shares of the Corporation shall be at all times under the control of the directors who may by resolution, from time to time,
accept subscriptions, allot, issue, grant options in respect of or otherwise dispose of the whole or any part of the unissued shares of the



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share capital of the Corporation on such terms and conditions, for such consideration not contrary to law or to the constituting act of the Corporation and at such times prescribed in such
resolutions. The directors may, from time to time, make calls upon the shareholders in respect of any moneys unpaid upon their shares. Each shareholder shall pay the amount called on his shares at the time and place fixed by the directors.

ARTICLE 4. POWERTODECLAREDIVIDENDS The directors may from time to time as
they may deem advisable, declare and pay dividends out of any funds available for dividends to the shareholders according to their respective rights and interest therein.

Any dividend may be paid by cheque or warrant made payable to and mailed to the address on the books of the Corporation of the shareholder entitled thereto and in the case of joint holders to that one of
them whose name stands first in the books of the Corporation, and the mailing of such cheque or warrant shall constitute payment unless the cheque or warrant is not paid upon presentation.

ARTICLE 5. PLACEOFMEETINGSANDNOTICES All meetings of the Board of Directors shall be held at such place, on such date
and at such time as may be determined from time to time by the Board of Directors or at any place where all the directors are present.

Any meeting of the Board of Directors may be called at any time by or on the order of the Chairman of the Board or, provided they are directors of the Corporation, the President or any Vice-President or
by any two directors.

Notice specifying the place, date and time of any meeting of the Board of Directors shall be given to
each of the directors at least 72 hours prior to the date fixed for such meeting. The notice may be mailed, postage prepaid, to each director at his residence or usual place of business, or delivered by hand or transmitted by any means of
telecommunication.

In any case where the convening of a meeting of directors is a matter of urgency, notice of such meeting
may be given not less than 3 hours before such meeting is to be held.

Notwithstanding any other provisions of this ARTICLE 5,
immediately after the annual meeting of shareholders in each year, a meeting of such of the newly elected directors as are then present shall be held, provided they shall constitute a quorum, without further notice, for the election or appointment
of officers of the Corporation and the transaction of such other business as may come before them.



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ARTICLE 6. CHAIRMAN The Chairman of the Board or, in his absence, the President, if he is a director,
or, in his absence, one of the Vice-Presidents who is a director of the Corporation (to be designated by the meeting in the event of more than one such Vice-President being present) shall preside at all meetings of the directors. If all of the
aforesaid officers are absent or decline to act, the directors present may choose one of their number to act as chairman of the meeting. In the event of an equality of votes, the chairman of any meeting shall be entitled to cast one vote as a
director, but not a second or casting vote in respect of any matter submitted to the vote of the meeting.

ARTICLE 7. QUORUM Except
when the Corporation has only one director, the directors may from time to time fix by resolution the quorum for meetings of directors, but until otherwise fixed, a majority of the directors in office shall constitute a quorum.

ARTICLE 8. VACANCIES AND RESIGNATION In the case of a vacancy occurring in the Board of Directors, the directors then in office, by the
affirmative vote of a majority of said remaining directors, so long as a quorum of the Board remains in office, may from time to time and at any time fill such vacancy for the remainder of the term.

ARTICLE 9. SOLE DIRECTOR In the case where the Corporation has only one director, the acts that may be or are required to be taken by the Board of
Directors or by two directors of the Corporation, under the Corporations by-laws, may be taken by the sole director of the Corporation.

BY-LAW THREE

OFFICERS

ARTICLE 1. OFFICERS The directors shall elect or appoint a President,
shall appoint a Secretary and may also elect or appoint as officers a Chairman of the Board, one or more Vice-Presidents, one or more Assistant-Secretaries, a Treasurer and one or more Assistant-Treasurers. Such officers shall be elected or
appointed at the first meeting of the Board of Directors after each annual meeting of shareholders. There may also be appointed such other officers as the Board of Directors may from time to time deem necessary. Such officers shall
respectively perform such duties, in addition to those specified in the by-laws of the Corporation, as shall from time to time be prescribed by the Board of Directors. The same person may hold more than one office, provided, however, that the
same person shall not hold the office of President and Vice-President. None of such officers except the Chairman of the Board need be a director of the Corporation.



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ARTICLE 2. CHAIRMAN OF THE BOARD The Chairman of the Board, if any, shall preside at all meetings of
directors and shareholders of the Corporation and he shall have such other powers and duties as the Board of Directors may determine from time to time.

ARTICLE 3. PRESIDENT The President shall be the chief executive officer of the Corporation and shall exercise a general control of and supervision over its affairs. He shall have such other
powers and duties as the Board of Directors may determine from time to time.

ARTICLE 4. VICE-PRESIDENT OR VICE-PRESIDENTS The
Vice-President or Vice-Presidents shall have such powers and duties as may be determined by the Board of Directors from time to time. In case of the absence, disability, refusal or omission to act of the President, a Vice-President designated
by the directors may exercise the powers and perform the duties of the President and, if such Vice-President exercises any of the powers or performs any of the duties of the President, the absence, disability, refusal or omission to act of the
President shall be presumed.

ARTICLE 5. TREASURERANDASSISTANT-TREASURERS The Treasurer shall
have general charge of the finances of the Corporation. He shall render to the Board of Directors, whenever directed by the Board and as soon as possible after the close of each financial year, an account of the financial condition of the
Corporation and of all his transactions as Treasurer. He shall have charge and custody of and be responsible for the keeping of the books of account required under the laws governing the Corporation. He shall perform all the acts
incidental to the office of Treasurer or as may be determined by the Board of Directors from time to time.

Assistant-Treasurers shall perform any of the duties of the Treasurer delegated to them from time to time by the Board of Directors or by
the Treasurer.

ARTICLE 6. SECRETARYANDASSISTANT-SECRETARIES The Secretary shall attend to the
giving of all notices of the Corporation and shall keep the records of all meetings and resolutions of the shareholders and of the Board of Directors in a book to be kept for that purpose. He shall keep in safe custody the seal of the
Corporation, if any. He shall have charge of the books containing the names and addresses of the shareholders and directors of the Corporation and such other books and papers as the Board of Directors may direct. He shall perform such
other duties incidental to his office or as may be required by the Board of Directors from time to time.

Assistant-Secretaries shall perform any of the duties of the Secretary delegated to them from time to time by the Board of Directors or
by the Secretary.



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ARTICLE 7. SECRETARY-TREASURER Whenever the Secretary shall also be the Treasurer he may, at the
option of the Board of Directors, be designated the Secretary-Treasurer.

ARTICLE 8. REMOVAL The Board of Directors may,
subject to the law and the provisions of any contract, remove and discharge any officer of the Corporation at any meeting called for that purpose and may elect or appoint any other person.

BY-LAW FOUR

SHARE CAPITAL

ARTICLE 1. SHARE CERTIFICATES Certificates representing shares of
the share capital of the Corporation shall be approved by the Board of Directors. Share certificates shall bear the signatures of two directors or two officers of the Corporation or of one director and one officer of the Corporation. Such
signatures may be engraved, lithographed or otherwise mechanically reproduced thereon. Any certificate bearing the facsimile reproduction of the signature of any of such authorized persons shall be deemed to have been manually signed by him and
shall be as valid to all intents and purposes as if it had been manually signed, notwithstanding that the person whose signature is so reproduced shall, at the time that the certificate is issued or on the date of such certificate, have ceased to be
an officer or director of the Corporation, as the case may be.

ARTICLE 2. TRANSFER OF SHARES A register of transfers containing the
date and particulars of all transfers of shares of the share capital of the Corporation shall be kept either at the head office or at such other office of the Corporation or at such other place in the Province of Québec or elsewhere in Canada
as may be determined, from time to time, by resolution of the Board of Directors. One or more branch registers of transfers may be kept at any office of the Corporation or any other place within the Province of Québec or elsewhere as may from
time to time be determined by resolution of the Board of Directors. The date and particulars of all transfers of shares contained in a branch register of transfers must also be entered in the register of transfers. Such register of transfers and
branch registers of transfers shall be kept by the Secretary or by such other officer or officers as may be specially charged with this duty or by such agent or agents as may be appointed from time to time for that purpose by resolution of the Board
of Directors.

Entry of the transfer of any share of the share capital of the Corporation may be made in the register of
transfers or in a branch register of transfers regardless of where the certificate representing the share to be transferred shall have been issued.



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If the shares of the share capital of the Corporation to be transferred are represented by a
certificate, the transfer of such shares shall not be entered in the register of transfers or the branch register of transfers, unless or until the certificate representing the shares to be transferred has been duly endorsed and surrendered for
cancellation.

ARTICLE 3. CLOSING OF BOOKS The Board of Directors may, from time to time, by resolution close the register of transfers
and the branch registers of transfers, if any, for any time or times not exceeding in the whole 60 days in each financial year of the Corporation on giving notice by advertisement in a newspaper published in the place where the register of transfers
is kept and in a newspaper published in the place where each of the branch registers of transfers is kept. The Board of Directors may by resolution fix in advance a date not exceeding 60 days preceding the date of any meeting of shareholders of
the Corporation or the date for the payment of any dividend or the date for the allotment of any rights as a record date for the determination of the shareholders entitled to receive notice of any such meeting or to receive payment of any such
dividend or to be allotted any such rights. Only shareholders of record on the record date so fixed shall be entitled to receive such notice or to receive payment of such dividend or to be allotted such rights, as the case may be,
notwithstanding any transfer of any shares on the books of the Corporation after such record date.

ARTICLE 4.
TRANSFERAGENTSANDREGISTRARS The Board of Directors may appoint or remove from time to time transfer agents or registrars of transfers of shares of the share capital of the
Corporation and, subject to the laws governing the Corporation, make regulations generally, from time to time, with reference to the transfer of the shares of the share capital of the Corporation. Upon any such appointment being made, all
certificates representing shares of the share capital of the Corporation thereafter issued shall be countersigned by one of such transfer agents or one of such registrars of transfers and shall not be valid unless so countersigned.

BY-LAW FIVE

FINANCIAL YEAR

The financial year of the Corporation
shall end on the 31stday of December in each year. Such
date may, however, be changed from time to time by resolution of the Board of Directors.



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BY-LAW SIX

ARTICLE 1. CONTRACTS All contracts, deeds, agreements, documents, bonds, debentures and other instruments requiring execution by the Corporation may be signed by two directors or two officers of
the Corporation or by one director and one officer of the Corporation or by such persons as the Board of Directors may otherwise authorize from time to time by resolution. Any such authorization may be general or confined to specific instances.

ARTICLE 2. CONFLICT OF INTERESTS The Corporation may transact business with one or more of its directors or with any firm of which one or
more of its directors are members or employees or with any corporation or association of which one or more of its directors are shareholders, directors, officers or employees. The director who has an interest in such transaction shall disclose
it to the Corporation and to the other directors making a decision in respect of such transaction and shall abstain from discussing and voting on the question except if his vote is required to bind the Corporation in respect of such transaction.

BY-LAW SEVEN

DECLARATIONS

Any director or officer of the Corporation or any other
person nominated for that purpose by any director or officer of the Corporation is authorized and empowered to give instructions to an attorney, for civil or for criminal, to appear and make answer for and on behalf and in the name of the
Corporation to all writs, orders and interrogatories upon articulated facts issued out of any court and to declare for and on behalf and in the name of the Corporation any answer to writs of attachment by way of garnishment in which the Corporation
is garnishee. Any director, officer or person so nominated is authorized and empowered to make all affidavits and sworn declarations in connection therewith or in connection with any and all judicial proceedings to which the Corporation is a
party and to instruct an attorney to make demands of abandonment or petitions for winding-up or bankruptcy orders upon any debtor of the Corporation and to attend and vote at all meetings of creditors of the Corporations debtors and grant
proxies in connection therewith. Any such director, officer or person is authorized to appoint by general or special power or powers of attorney any person or persons, including any person other than those directors, officers and persons
hereinbefore mentioned, as attorney or attorneys of the Corporation to do any of the foregoing things.



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BY-LAW EIGHT

SEAL

The seal of the Corporation, if any, may be affixed by any director
or officer of the Corporation or by any person designated by such director or officer.

BY-LAW NINE

REGULATION 45-106

ARTICLE 1. NUMBER OF HOLDERS OF SHARES AND SECURITIES The beneficial ownership of securities of the Corporation, including its shareholders, shall
be limited to fifty (50) persons, not including employees and former employees of the Corporation or its affiliates, provided that each person is counted as one beneficial owner unless the person is created or used solely to purchase or hold
securities of the Corporation in which case each beneficial owner or each beneficiary of the person, as the case may be, must be counted as a separate beneficial owner

ARTICLE 2. ISSUE OF SECURITIES The directors, by way of resolution, may accept subscriptions for securities, allot or issue securities of the Company at such times, on such terms and
conditions, to such persons and for such consideration as they see fit.

ARTICLE 3. PRIVATE ISSUER STATUS The directors shall use their
best efforts to ensure that the Corporation remains a private issuer and complies with the provisions of the Regulation 45-106.

ARTICLE 4. DECLARATION OF SUBSCRIBER Any person who subscribes shares or other securities issued by the Corporation shall declare to the
Corporation that this subscription is exempted from prospectus and registration requirements pursuant to section 2.4 of the Regulation 45-106

ARTICLE 5. DECLARATION OF TRANSFEREE Any person who purchases shares or other securities of the Corporation shall declare that his acquisition is exempted from prospectus and registration
requirements pursuant to the Regulation 45-106.

ARTICLE 6. COMMISSION No commission or other remuneration, including a
finders fee, shall be paid in connection with the sale of shares or other securities to a director, executive officer, control person or founder of the Corporation or of an affiliate of the Company.



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| |  |                              
| |  | -----------------------------
| |  | ADOPTED on February 15, 2016.
| | 
| |  | The President,               
| | 
| |  | /s/ Benjamin Desmarais       
| |  | Benjamin Desmarais           
| | 
| |  | The Corporate Secretary      
| | 
| |  | /s/ Marc M. Tremblay         
| |  | Marc M. Tremblay             



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BY-LAW TEN

BORROWING POWERS

The administrators of the Corporation are hereby authorized, when to
their best judgment, it is in the best interest of the Corporation to:



| | (a) | borrow money on the credit of the Corporation from any bank, corporation, firm, association or individual, in the amount and in the conditions the Board of directors
sees fit, and in the best interest of the Corporation;
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| | (b) | increase or decrease the amount to be borrowed;
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| | (c) | issue or have issued, sell or pledge bonds, debentures, notes or other debt obligations of the Corporation as by the terms, agreements and conditions and for the sums
as seen fit by the Board of directors;
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| | (d) | hypothecate movable and immovable property of the Corporation currently owned or subsequently acquired to secure payment or performance of an obligation or other debt
obligations of the Corporation;
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| | (e) | mortgage, hypothecate, charge, pledge or otherwise create a security interest in all or any currently owned or subsequently acquired movable and immovable property of
the Corporation to secure such bonds, debentures, notes or other debt obligations, other than those contracted by the issuing of bonds or other securities;
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| | (f) | provide a guarantee on behalf of the Corporation to secure payment of all debt obligations such as borrowed monies, debentures, notes, credits, overdraft advances, or
other debts in favour of a bank, corporation, firm or person, including interest, hypothecate and provide to any bank, corporation, firm or any individual, all or any one of the Corporation property, movable or immovable, currently owned or
subsequently acquired and provide guarantees that may be accepted by a bank in virtue of the different sections of the Bank Act, renew, modify or substitute such guarantees from time to time, with the authority to contract promises, to provide
guarantees in virtue of the Bank Act related to any current debt or subsequently contracted by the Corporation with any bank;
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| | (g) | the Board of directors may from time to time, by resolution, delegate to any one or more directors or officers all or any of the powers conferred on the directors by
paragraph 1 of this by-law to the full extent thereof or such lesser extent as the directors may in any such resolution provide;
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AND the powers hereby conferred shall be deemed to be permanent and not subject to cease after the first exercise. Such powers can be used from time
to time as long as they are not revoked by a written resolution.



| |  |                              
| |  | -----------------------------
| |  | ADOPTED on February 15, 2016.
| | 
| |  | The President,               
| | 
| |  | /s/ Benjamin Desmarais       
| |  | Benjamin Desmarais           
| | 
| |  | The Corporate Secretary      
| | 
| |  | /s/ Marc M. Tremblay         
| |  | Marc M. Tremblay             



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