DRAFT UGANDA STANDARD  
  DUS 2244  
First  Edition  
2020 -03-02 
 
 
 Reference number  
DUS 2244 :2020  
© UNBS 2020   
  
Non-woven bags — Specification  
 DUS 2244 : 2020  
ii © UNBS  2020  – All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct applicati on 
© UNBS 2020   
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written 
permission from UN BS. 
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 4 333 2 50/1/2/3  
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  DUS 2244 :2020  
© UNBS 2020  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  2 
4 Requirements  ................................ ................................ ................................ ................................ .........  2 
4.1 General requirements for fabric  ................................ ................................ ................................ ...........  2 
4.2 Edge sealing  ................................ ................................ ................................ ................................ ..........  2 
4.3 Handles  ................................ ................................ ................................ ................................ ...................  2 
4.4 Freedom from defects  ................................ ................................ ................................ ...........................  3 
5 Specific requirements  ................................ ................................ ................................ ...........................  3 
5.1 Specific requirements f or non -woven polypropylene bags  ................................ ..............................  3 
5.1.3  Microbiological requirements  ................................ ................................ ................................ ..............  3 
5.2 Dimension and capacity  ................................ ................................ ................................ .......................  4 
5.3 Overall migration  ................................ ................................ ................................ ................................ ... 4 
5.4 Pigments, colorants and heavy metals  ................................ ................................ ...............................  4 
5.5 Dimensional stability ................................ ................................ ................................ .............................  4 
6 Drop test  ................................ ................................ ................................ ................................ .................  4 
6.1 Butt dropping  ................................ ................................ ................................ ................................ .........  4 
6.2 Flat dropping  ................................ ................................ ................................ ................................ ..........  4 
7 Packaging and labelling ................................ ................................ ................................ ........................  5 
7.1 Packaging  ................................ ................................ ................................ ................................ ...............  5 
7.2 Marking  ................................ ................................ ................................ ................................ ...................  5 
8 Sampling and criteria of conformity  ................................ ................................ ................................ .... 5 
8.1 Lot ................................ ................................ ................................ ................................ ...........................  5 
8.2 Sampling  ................................ ................................ ................................ ................................ ................  5 
8.3 Criteria for Conformity  ................................ ................................ ................................ ..........................  6 
Annex  A (normative)  Determination of pull strength of handle ................................ ................................ .... 7 
Bibliography  ................................ ................................ ................................ ................................ ........................  9 
 DUS 2244 : 2020  
iv © UNBS  2020  – All rights reserved  
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade , Industry and 
Cooperatives established under Cap 327 , of the Laws of Uganda , as amended .  UNBS is mandated to co -
ordinate the ela boration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT  Agreement  of the World Trade Organis ation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of key stakeholders 
including government, academia, consu mer groups, private sector and other interested parties.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Technical Committee UNBS /TC 19, Packaging and packaging 
products . 
  DRAFT UGANDA STANDARD  DUS 2244 : 2020  
 
© UNBS 2020  – All rights reserved  1 
 Non-woven bags — Specification  
1 Scope  
This Draft Uganda Standard specifies requirements and test methods for non -woven bags used for packaging . 
2 Normative references  
The following referenced documents referred to in the text in such a way that some or all of their content 
constitutes requirem ents of this document. For dated references, only the edition cited applies. For undated 
references, the latest edition of the referenced document (including any amendments) applies.  
US 1675 , Determination of overall migration of constituents of plastic ma terials and articles intended to come 
in contact with food stuffs — Methods of analysis  
US 1659 , Materials in contact with food — Requirements for packaging materials  
ISO 9092 , Nonwovens – Vocabulary  
ISO 907 -5, Textiles — Test methods for nonwovens — Part 5: Determination of resistance to mechanical 
penetration (ball burst procedure)  
ISO 9073 -6, Textiles — Test methods for nonwovens — Part 6: Absorption  
ISO 9073 -4, Textiles — Test methods for nonwovens — Part 4: D etermination of tear resistance  
US ISO 9073 -1, Textile -non woven Fabrics — Part 1: Determination of mass per unit area  
ISO 9073 -18, Textiles — Test methods for nonwovens — Part 18: Determination of breaking strength and 
elongation of nonwoven  materials using the grab tensile test  
ISO 9073 -17, Textiles — Test methods for nonwovens — Part 17: Determination of water penetration (spray 
impact)  
ISO 9073 -16, Textiles — Test methods for nonwovens — Part 16: Determination of resistance to penetration 
by water (hydrostatic pressure)  
ISO 9073 -15, Textiles — Test methods for nonwovens — Part 15: Determination of air permeability  
ISO 9073 -1, Textiles — Test methods for nonwovens — Part 1: Determination of mass per unit area  
ISO 22198 , Textile Fabrics — Determination of width and length  
ISO 177 , Plastics — Determination of migration of plasticizers  
ISO 16373 -3, Textiles — Dyestuffs Part 3: Method for determination of certain carcinogenic dyestuffs (method 
using triethyl amine/methanol)  DUS 2244: 2020  
2 © UNBS 2020  – All rights  reserved  
 ISO 16373 -2, Textiles  — Dyestuffs — Part 2: General method for the determination of extractable dyestuffs 
including allergenic and carcinogenic dyestuffs (method using pyridine -water)  
ISO 16373 -1, Textiles — Dyestuff Part 1: General principles of testing coloured textiles for  dyestuff 
identification  
ISO 13934 -1, Textiles — Tensile properties of fabrics — Part 1: Determination of maximum force and 
elongation at maximum force using the strip method  
ISO 139 , Textiles — Standard atmospheres for conditioning and testing  
ISO 12947 -2, Textiles — Determination of the abrasion resistance of fabrics by the Martindale method -- Part 
2: Determination of specimen breakdown  
ISO 1130 , Textile fibres — Some methods of sampling for testing  
ISO 105 -Z06, Textiles — Tests for colour fastness — Part Z06: Evaluation of dye and pigment migration.  
3 Terms and definitions  
For the purposes of this document, the following terms and definitions apply.  
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
3.1  
non-woven  
a manufactured sheet, web or batt of directionally or randomly oriented fibres, bonded by friction, and/or 
cohesion, and/or adhesion  
Note  Non-woven excludes p aper and products which are woven, knitted, tufted, stitch bonded incorporating binding 
yarns or filaments, or felted by wet milling  
4 Requirements  
4.1 General requirements for fabric  
4.1.1  The fabric used to make the bag shall be polypropylene of virgin r esin.  
4.1.2  The fabric constituting the non -woven bags shall be free from restricted colorants listed and when 
tested in accordance with ISO 14362 -1 and ISO 14362 -3, ISO 16373 -2 and ISO 16373 -3. Colorants on 
textiles shall be identified and classified in a ccordance with ISO 16373 -1. 
4.2 Edge sealing  
All raw edges and unfinished edges shall not be exposed.  
4.3 Handles  
When tested i n accordance with Annex A the handle withdrawal force shall be 150 N  min. DUS 2244 : 2020  
© UNBS 2020  – All rights reserved  3 
 4.4 Freedom from defects  
The non -woven bag shall be f ree from defects such as holes, cuts, tears, floats, crushed selvedges, spots and 
stains, loose and frayed ends  
5 Specific requirements  
5.1 Specific requirements for non -woven polypropylene bags  
5.1.1  Non-woven bags shall meet the physical requirements as  specified in table 1 when tested in 
accordance to the methods specified therein.  
Table 1—Specific requirements for non -woven bags  
S/N Characteristic  Requirement  Method of test  
I.  Mass per unit area, g/m2, min. 80 US ISO 9073 -1 
II.  Breaking strengt h of the fabric (Grab 
method), N, min.  MD1 220 ISO 9073 -18 
III.  CD2 140 
IV.  Water penetration resistance (hydrostatic 
pressure), cm head, min.  10 ISO 9073 -16 
V.  Water penetration resistance (spray 
impact), g, max.  2.00 ISO 9073 -17 
VI.  Seam Strength (grab method), N. min.  60 ISO 9073 -18 
VII.  Handle strength,  N, min.  150 Annex A 
VIII.  Puncture resistance (ball burst method), 
N, min.  100 ISO 907 -5 
IX.  Abrasion resistance, cycles, min.  10 000 ISO 12947 -2 
X.  Tear resistance (trapezoid), N, min.  MD1) 100 ISO 9073 -4 
CD2) 80 
XI.  Colour fastness to rubbing (cr ocking), 
min.  Dry 4 ISO 105 -Z06 
Wet 4 
XII.  Colour fastness to washing  Colour change  4 ISO 105 -Z06 
Staining  4 
XIII.  Fibre composition  Shall contain atleast 95% 
polyprop ylene - 
1) Machine direction  
2) Cross direction  
5.1.3  Microbiological requirements  
Non-woven bags material shall comply with microbiological limits given in Table 2 when tested in accordance 
to the methods specified therein.  DUS 2244: 2020  
4 © UNBS 2020  – All rights  reserved  
 Table 2 — Microbiological requirements for non -woven bags  
S/N Characteristic  Limit  Test method  
i.  Total plate count, cfu /g, max.  300 
ISO 8784 -1 ii.  Pseudomonas aeruginosa , cfu/g  Not detected in 1 g 
of the product  
iii.  Staphylococcus aureus , cfu/g  
iv.  Candida albicans , cfu/g  
 
5.2 Dimension and capacity  
Bags may be produced in different dimensions and capacity. The dimensions and capacity s hall be declared 
by the manufacturer.  
When tested in accordance with ISO 22198, the nominal dimensions of the ba gs shall be as declared subject 
to a tolerance of ± 2 cm . Capacity of the bag shall not be less than the declared value.   
5.3 Overall migration  
When tested in accordance with US 1675 , the non -woven bag shall also comply with the overall migration 
limits. 60 mg/kg (max.) of the foodstuff . 
5.4 Heavy metals  
When tested in accordance with US 1659 , the non -woven bag shall comply with the list and limits of the heavy 
metals spec ified therein.  
5.5 Dimensional stability  
The dimensional change after five washings of the fabric constituting the non -woven polypropylene bag shall 
not be greater than 3 % when tested in accordance with ISO 5077.  
6 Drop test  
6.1 Butt dropping  
When tested in accordance with ISO 7965 -2 at a height of 1.20 m on the bottom and the top of the bag, after 
each drop, there shall be no rupture or loss of contents.  
6.2 Flat dropping  
When tested in accordance with ISO 7965 -2 at a height of  1.60 m twice on one flat face and twice on the 
opposite flat face, there shall be no rupture or loss of contents.  DUS 2244 : 2020  
© UNBS 2020  – All rights reserved  5 
 7 Packaging and labelling  
7.1 Packaging  
7.1.1  Non-woven bags shall be packed in suitable materials that prevents it from damage, contaminatio n 
during normal handling, storage and transportation.  
7.1.2  The bags shall be packaged in agreed quantities between the buyer and seller  
7.2 Marking  
7.2.1  The non -woven bag shall be legibly and indelibly marked with the following information on the label:  
a) Manufacturer’s name, address and /or registered trade mark;  
b) Description of goods – “Non -woven Bag s”;  
c) Capacity of the bag in g rams ; 
d) Dimensions of the bag;  
e) Batch number or code;  
f) Instruction for correct use;  
g) Instruction for storage and disposal; and  
h) The declaration of country of manufacture and origin.  
7.2.2  The bulk package shall be marked with the following information:  
a) Manufacturer’s name, address and /or registered trade mark;  
b) Description of goods, “ Non-woven Bags”;  
c) Capacity of the bag;  
d) Number of pieces ; 
e) Batch number or code;  
f) Instruction for storage and disposal of bulk packaging material; and  
g) The declaration of country of manufacture and origin.  
8 Sampling and criteria of conformity  
8.1 Lot 
In a consignment, all non -woven  bags of the same variety shall be grouped together to constitute a lot. Each 
lot shall be separately sampled for the purpose of ascertaining the conformity of the requirements of the 
specification  
8.2 Sampling  
8.2.1  From each lot, sample bags shall be selected at random as prescribed in Table 3 below.  DUS 2244: 2020  
6 © UNBS 2020  – All rights  reserved  
  
Table 2 — Sampling criteria  
Lot size -No. of the bags  Sample size -No of the bags  
Up to 25  4 
26 to 50  6 
51 to 100  8 
101 and above  10 
8.2.2  The bags selected as per Table 3 above shall be tested for requiremenst  given  in Table s 1 and 2  
8.3 Criteria for Conformity  
The lot shall be considered as conforming to this standard if all the test results satisfy the requirements of this 
standard.  DUS 2244 : 2020  
© UNBS 2020  – All rights reserved  7 
 Annex  A 
(normative)  
 
Determination of pull strength  of handle  
A.1 Determine and m ark the end point  of all  the handles tail  
A.2 As per distance between the upper clamp or jaw, reduce the length of the bag by knot or stitch to get 
the clear look to the handle loop  
A.3 Hook the handle loop to the upper clamp or jaw  
A.4 From bottom of the non-woven bag, fold 8cm and grip the fold line to the lower clam or jaw  
A.5 At constant transverse rate of 20cm per minute, measure the breaking point for 5 specimens to 
evaluate the puling strength . 
 
Figure A. 1 — Pull strength  testing machine  DUS 2244: 2020  
8 © UNBS 2020  – All rights  reserved  
 
 
 
Key 
A Mid-point of the span, L  
H Height of the handle loop  
L Span of the handle  
Figure A. 2 — Handle dimensions  
 
 DUS 2244 : 2020  
© UNBS 2020  – All rights reserved  9 
 Bibliography  
[1] TDC3 (6335)P3 , Textiles – Non-woven bags – Specification  
[2] KNWA/ TL/01:2019 , Non-woven bags — Specification  
 WDUS 2244: 2020  
© UNBS 2020  – All rights reserved  11 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Certification Mark  is governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the relevant Uganda Standar d. The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements of that standard under a system of supervision, control and testing in accordance with the 
certification mark scheme of the Ug anda National Bureau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau of Standards.  
 
 WDUS 2244: 2020    
 
ICS 59.080.30  
Price b ased on nn pages  
© UNBS 2020 – All rights reserved