Woven polypropylene sacks for bulk packaging of foodstuffs

ISO 23560:2015 specifies the general characteristics, requirements, and methods of test for woven polypropylene (PP) sacks. It is applicable to woven PP sacks, having a capacity of 50 kg or 25 kg, intended for the transport and storage of foodstuffs, such as cereals, sugar, and pulses.

Sacs tissés en polypropylène pour l'emballage en vrac de denrées alimentaires

General Information

Publication Date
Current Stage
9093 - International Standard confirmed
Completion Date
Ref Project


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ISO 23560:2015 - Woven polypropylene sacks for bulk packaging of foodstuffs
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Standards Content (Sample)

Second edition
Woven polypropylene sacks for bulk
packaging of foodstuffs
Sacs tissés en polypropylène pour l’emballage en vrac de denrées
Reference number
ISO 23560:2015(E)
ISO 2015

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ISO 23560:2015(E)

© ISO 2015
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
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Published in Switzerland
ii © ISO 2015 – All rights reserved

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ISO 23560:2015(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Manufacture . 1
4.1 Raw materials . 1
4.2 Fabric . 2
5 Sack. 2
6 Liner . 3
7 Requirements . 3
7.1 Conditioning and test conditions . 3
7.2 Construction parameters . 3
7.3 UV resistance . 3
7.4 Mass of the bale . 3
7.5 Drop testing . 3
8 Food compatibility . 3
9 Marking and packaging . 3
9.1 Marking on sacks . 3
9.2 Packaging . 4
9.3 Marking on bales . 4
10 Sampling and criteria for conformity . 4
10.1 Sampling . 4
10.2 Criteria for conformity . 4
Annex A (normative) Method of calculation of the mass of a sack . 6
Annex B (normative) Breaking strength of fabric and bottom seam . 7
Annex C (normative) Drop testing . 8
Bibliography . 9
© ISO 2015 – All rights reserved iii

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ISO 23560:2015(E)

ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 61, Plastics, Subcommittee SC 11, Products.
This second edition cancels and replaces the first edition (ISO 23560:2008), which has been technically
iv © ISO 2015 – All rights reserved

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ISO 23560:2015(E)

With the removal of trade barriers between nations, there is a need for an International Standard for
the packaging, transportation, and storage of foodstuffs such as cereals. Polypropylene (PP) sacks made
from woven fabric are an ideal choice for the packaging of foodstuffs. Such sacks are produced from
food-grade polypropylene and ensure the mechanical strength needed for storage and transportation.
This International Standard describes the construction of the sacks, their dimensions, and test methods
suitable for ensuring the long-term storage and transportation of foodstuffs in the sacks.
© ISO 2015 – All rights reserved v

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Woven polypropylene sacks for bulk packaging of
1 Scope
This International Standard specifies the general characteristics, requirements, and methods of test for
woven polypropylene (PP) sacks. It is applicable to woven PP sacks, having a capacity of 50 kg or 25 kg,
intended for the transport and storage of foodstuffs, such as cereals, sugar, and pulses.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 291, Plastics — Standard atmospheres for conditioning and testing
ISO 3451-1:2008, Plastics — Determination of ash — Part 1: General methods
ISO 4892-3:2013, Plastics — Methods of exposure to laboratory light sources — Part 3: Fluorescent UV
ISO 4915, Textiles — Stitch types — Classification and terminology
ISO 6591-2, Packaging — Sacks — Description and method of measurement — Part 2: Empty sacks made
from thermoplastic flexible film
ISO 13934-1, Textiles — Tensile properties of fabrics — Part 1: Determination of maximum force and
elongation at maximum force using the strip method
ISO 13935-1, Textiles — Seam tensile properties of fabrics and made-up textile articles — Part 1:
Determination of maximum force to seam rupture using the strip method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
woven PP sack
container made of woven polypropylene (PP) fabric, closed at one end, in certain cases combined with
other flexible materials used, for instance, for the liner to provide the properties required for filling,
storage, and distribution of the packaged commodity
4 Manufacture
4.1 Raw materials
A suitable grade of PP conforming to food contact requirements shall be utilized in the manufacture of
the PP tape/fabric used in the sacks.
© ISO 2015 – All rights reserved 1

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ISO 23560:2015(E)

4.2 Fabric
The fabric used in the manufacture of woven PP sacks shall be woven as a tube on a circular loom from

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