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DUS DEAS 868

First Edition 2015-mm-dd

Reference number DUS DEAS 868: 2015

© UNBS 2015

Sack kraft paper — Part 1, Natural and extensible kraft paper — Specification

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DUS DEAS 868:2015

ii © UNBS 2015 - 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 2015

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 41 505 995 Fax: 256 41 286 123 E-mail: unbs@infocom.co.ug Web: www.unbs.go.ug

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National 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 representatives of consumers, traders, academicians, manufacturers, government and other stakeholders.

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. This Draft Uganda Standard, DUS DEAS 868: 2015, Sack kraft paper — Part 1, Natural and extensible kraft paper — Specification, is identical with and has been reproduced from an East African Standard, DEAS 868: 2015, Sack kraft paper — Part 1, Natural and extensible kraft paper — Specification, and is being proposed for adoption as a Uganda Standard.

Wherever the words, “East African Standard" appear, they should be replaced by "Uganda Standard."

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DEAS 868:2015

ICS

© EAS 2014 First Edition 2014

DRAFT EAST AFRICAN STANDARD

Specification for sack Kraft paper; Part 1. Natural and extensible sack Kraft paper

EAST AFRICAN COMMUNITY

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CD/K/25:2014

ii © EAC 2014 – All rights reserved

Copyright notice

This EAC document is copyright-protected by EAC. While the reproduction of this document by participants in the EAC standards development process is permitted without prior permission from EAC, neither this document nor any extract from it may be reproduced, stored or transmitted in any form for any other purpose without prior written permission from EAC.

Requests for permission to reproduce this document for the purpose of selling it should be addressed as shown below or to EAC’s member body in the country of the requester:

© East African Community 2013 — All rights reserved East African Community P.O.Box 1096 Arusha Tanzania Tel: 255 27 2504253/8 Fax: 255 27 2504481/2504255 E-mail: eac@eachq.org

Web: www.eac-quality.net

Reproduction for sales purposes may be subject to royalty payments or a licensing agreement. Violators may be persecuted

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DEAS 868:2015

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Foreword

Development of the East African Standards has been necessitated by the need for harmonizing requirements governing quality of products and services in the East African Community. It is envisaged that through harmonized standardization, trade barriers that are encountered when goods and services are exchanged within the Community will be removed.

In order to achieve this objective, the Community established an East African Standards Committee mandated to develop and issue East African Standards.

The Committee is composed of representatives of the National Standards Bodies in Partner States, together with the representatives from the private sectors and consumer organizations. Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the Partner States. The comments received are discussed and incorporated before finalization of standards, in accordance with the procedures of the Community.

East African Standards are subject to review, to keep pace with technological advances. Users of the East African Standards are therefore expected to ensure that they always have the latest versions of the standards they are implementing. This Draft East African Standard, DEAS.868:2015., was prepared by Technical Committee EASC//TC/065 Paper and paper products The Committee is composed of representatives from National Standards Bodies, regulators and academia, together with the representatives from the private sector and consumer organizations in Partner States.

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DRAFT EAST AFRICAN STANDARD DEAS 868:2015

© EAC 2014 – All rights reserved 1

Sack Kraft paper Part 1. Natural and extensible sack Kraft paper

Specification

1 Scope

This Draft East African Standard specifies requirements and test methods for natural and extensible sack Kraft paper.

2 Normative

ISO 1924-3, Paper and board -- Determination of tensile properties -- Part 3: Constant rate of elongation method (100 mm/min)

ISO 535; Paper and board -- Determination of water absorptiveness -- Cobb method

ISO 5636; Paper and board -- Determination of air permeance (medium range)

ISO 536; Paper and board — Determination of grammage

ISO 287; Paper and board -- Determination of moisture content of a lot -- Oven-drying method

ISO 216, Writing paper and certain classes of printed matter -- Trimmed sizes -- A and B series, and indication of machine direction

ISO 2758:2014 Paper -- Determination of bursting strength

3 Terms and Definitions

For the purposes of this standard, the definitions contained in ISO 6590-1 shall apply

4 Requirements

4.1 General requirements

4.1.1 Fibre Composition — The composition of the sack Kraft paper shall be free from mechanical pulp.

4.1.2 Finish — The surface of the paper shall be machine finished. The paper shall be of uniform formation, thickness and substance. It shall be evenly finished, free from conspicuous specks, holes and other blemishes.

4.1.3 Dimensions — The manufacturer shall declare the dimensions of the roll. When in sheet form, it shall be of a series as prescribed in ISO 216. The permissible tolerance on the nominal dimension shall be ± 0.5 per cent.

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4.1.4 Joints — The edges of the rolls shall be clean and perpendicular to the axis of the roll. There shall be not more than 3 splices. Where glue is used, it shall not penetrate to the other layers. The joint shall be clean, properly made and strong enough to prevent breakage of paper when run of a converting machine. The splices place shall be marked with a clear arrow mark visible on both sides of the roll.

4.2 Specific requirements —

The paper shall comply with the requirements given in Table 1 when tested in accordance with the test methods referred to in the table.

TABLE 1 Specific requirements for natural and extensible sack kraft paper

SL

NO.

CHARACTERITICS

REQUIREMENTS METHOD OF TEST

Natural sack Kraft Extensible sack Kraft

(i) Grammage, gsm, , ±5% 70 76 80 90 95 70

75 80 85

90 ISO 536

(ii) Moisture content,

(%) range 6-8 6-8 6-8 6-8 6-8 6-8 6-8 6-8 6-8 6-8 ISO 287

(iii) Tensile strength

(kN/m) MD, min. 5.46 5.93 6.24 7.02 7.41 5.3 5.6 5.8 6.1

6.4 ISO 1924-3

(iv) Tensile strength

(kN/m) CD, min. 2.52 2.74 2.88 3.24 3.42 3.5 3.6 3.8 4.0

4.5 ISO 1924-3

(v) Stretch (elongation) (%) MD, min. 2.1 2.1 2.1 2.1 2.1 7.5 7.5 7.5 7.5

7.5

ISO 1924-3

(vi) Stretch (elongation) (%) CD, min. 5 5 5

5 5 7.0 7.0 7.0 7.0

7.0 ISO 1924-3

(vii) T.E.A index J/g MD, min. 1.0 1.0 1.0 1.0 1.0 2.8 2.8 2.8 2.8

2.8 ISO 1924-3

(viii) T.E.A index J/gCD, min. 1.3 1.3 1.3 1.3 1.3 2.2 2.2 2.2 2.2

2.2 ISO 1924-3

(ix) Porosity (mL/min.), min. 250 250 250 250 250 180 180 180 180 180 ISO 5636

(x) COBB number per min. range (g/m2)

25-35

25-35

25-35

25-35

25-35

25-35

25-35

25-35

25-35

25-35 ISO 535

(xii) Burst indexa), KPa*m2/g, min.

DRY 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 ISO 2758

WET 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 ASTMD 774/ISO 2758

(xii)

Tear index, mNm2/g

(MD/CD), min

MD

9.0 9.0

9.0

9.0

9.0 25 25 25 25 25 ISO 1924-3

CD

11.0

11.0

11.0

11.0

11.0

ISO 1924-3

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DEAS 868:2015

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Tensile Index

Nm/g

MD

78

78

78

78

78

ISO 1924-3

CD

36

36

36

36

36

ISO 1924-3

a) Burst index = burst factor X 0.098

4 Packaging and Labeling

4.1 Packaging

4.1.1 The paper shall be marketed in rolls. It shall be wound on a hollow cylindrical core made in one continuous length. The core shall be rigid and smooth made of paper, cardboard or other suitable material.

4.1.2 The length of the core shall not exceed the width of the paper. Its inner diameter shall be 76 or 100 mm and its thickness 15 2 mm.

4.1.3 Each end of the core shall be closed with a plug made of wood or any other suitable material. The plug shall be firmly secured to the core. The paper shall not have any creases.

4.2 Labelling

Each roll shall be clearly marked with the following information:

a) Name and physical address of the manufacturer;

b) Name of the product;

c) Size and grammage of paper;

d) Gross weight of the roll;

e) Roll number, Batch number and lot number;

f) Country of origin.

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