non-woven bags specificationthe non-woven bag shall be free from defects such as holes, cuts, tears,...

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 application

© 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 UNBS.

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: +256 414 333 250/1/2/3 Fax: +256 414 286 123 E-mail: [email protected] Web: www.unbs.go.ug

mailto:[email protected]

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 for 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 elaboration 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 Organisation (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, consumer 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 requirements 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 materials 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: Determination 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 paper 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 resin.

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 accordance with ISO 16373-1.

4.2 Edge sealing

All raw edges and unfinished edges shall not be exposed.

4.3 Handles

When tested in accordance with Annex A the handle withdrawal force shall be 150 N min.

DUS 2244: 2020


4.4 Freedom from defects

The non-woven bag shall be free 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 strength 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 (crocking),

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% polypropylene

-

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


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 shall be declared by the manufacturer.

When tested in accordance with ISO 22198, the nominal dimensions of the bags 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 specified 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


7 Packaging and labelling

7.1 Packaging

7.1.1 Non-woven bags shall be packed in suitable materials that prevents it from damage, contamination 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 Bags”;

c) Capacity of the bag in grams;

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


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 Tables 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


Annex A (normative)

Determination of pull strength of handle

A.1 Determine and mark 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


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


Bibliography

[1] TDC3 (6335)P3, Textiles – Non-woven bags – Specification

[2] KNWA/TL/01:2019, Non-woven bags — Specification

WDUS 2244: 2020


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 Standard. 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 Uganda 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.

non-woven bags specificationthe non-woven bag shall be free from defects such as holes, cuts, tears,...

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