ISO/FDIS 14631

Extruded sheets of impact-modified polystyrene (PS-I) -- Requirements and test methods

Plaques extrudées en polystyrène modifié résistant au choc (PS-I) -- Exigences et méthodes d'essai

Standards Content (sample)

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 14631
ISO/TC 61/SC 11
Extruded sheets of impact-modified
Secretariat: JISC
polystyrene (PS-I) — Requirements
Voting begins on:
2021­02­15 and test methods
Voting terminates on:
Plaques extrudées en polystyrène modifié résistant au choc (PS-I) —
2021­05­09
Prescriptions et méthodes d'essai
ISO/CEN PARALLEL PROCESSING
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 14631:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2021
---------------------- Page: 1 ----------------------
ISO/FDIS 14631:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH­1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 14631:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Material .......................................................................................................................................................................................................................... 2

5 Requirements .......................................................................................................................................................................................................... 2

5.1 Appearance ................................................................................................................................................................................................ 2

5.2 Dimensional tolerances ................................................................................................................................................................... 2

5.2.1 Thickness ................................................................................................................................................................................ 2

5.2.2 Length and width ............................................................................................................................................................ 2

5.2.3 Rectangularity .................................................................................................................................................................... 3

5.2.4 Bow of sheets in rolled form .................................................................................................................................. 3

5.3 Properties .................................................................................................................................................................................................... 3

5.3.1 General...................................................................................................................................................................................... 3

5.3.2 Mechanical and thermal properties ................................................................................................................ 4

5.3.3 Behaviour after heating ............................................................................................................................................. 4

5.3.4 Physiological behaviour ........................................................................................................................................... .. 5

6 Test methods ............................................................................................................................................................................................................. 5

6.1 Test specimens ........................................................................................................................................................................................ 5

6.1.1 Preparation of test specimens .............................................................................................................................. 5

6.1.2 Conditioning ........................................................................................................................................................................ 5

6.1.3 Testing ....................................................................................................................................................................................... 5

6.2 Delivery condition ................................................................................................................................................................................ 5

6.3 Appearance ................................................................................................................................................................................................ 5

6.4 Dimensions ................................................................................................................................................................................................. 6

6.4.1 Thickness (h) ...................................................................................................................................................................... 6

6.4.2 Length (l) and width (b) ........................................................................................................................................... . 6

6.4.3 Rectangularity .................................................................................................................................................................... 6

6.4.4 Bow of sheets in rolled form .................................................................................................................................. 6

6.5 Density ........................................................................................................................................................................................................... 6

6.6 Mechanical properties ...................................................................................................................................................................... 6

6.6.1 Tensile stress at yield (σ ) ....................................................................................................................................... 6

6.6.2 Nominal tensile strain at break (ε ) .............................................................................................................. 6

6.6.3 Modulus of elasticity in tension (E ) ............................................................................................................... 6

6.6.4 Charpy impact strength of unnotched specimens (a ) ................................................................ 7

6.6.5 Charpy impact strength of notched specimens (a ) ....................................................................... 7

6.6.6 Multiaxial impact strength ...................................................................................................................................... 7

6.6.7 Ball indentation hardness ........................................................................................................................................ 7

6.7 Thermal properties ............................................................................................................................................................................. 7

6.7.1 Vicat softening temperature .................................................................................................................................. 7

6.7.2 Determination of shrinkage after heating.................................................................................................. 7

7 Designation ................................................................................................................................................................................................................ 9

7.1 Example for PS-I-sheets .................................................................................................................................................................. 9

7.2 Example for PS-I sheets in roll form ..................................................................................................................................... 9

8 Marking .......................................................................................................................................................................................................................... 9

Annex A (informative) Additional guide values .....................................................................................................................................10

Bibliography .............................................................................................................................................................................................................................11

© ISO 2021 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 14631:2021(E)
Foreword

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 non­governmental, 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 of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products,

in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/

TC 249, Plastics, in accordance with the Agreement on technical cooperation between ISO and CEN

(Vienna Agreement).

This second edition cancels and replaces the first edition (ISO 14631:1999) of which it constitutes a

minor revision.
The change compared to the previous edition are as follows:
— references to ISO 2897-1 have been replaced by ISO 19063-1.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 14631:2021(E)
Extruded sheets of impact-modified polystyrene (PS-I) —
Requirements and test methods
1 Scope

This document specifies the requirements and test methods for solid flat extruded sheets of impact-

modified polystyrene (PS-I) without fillers and reinforcing materials.

This document applies only to thickness 0,25 mm to 20,0 . It also applies to PS-I sheet in roll form.

2 Normative references

The following documents are 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.

ISO 179­1, Plastics — Determination of Charpy impact properties — Part 2: Instrumented impact test

ISO 291, Plastics — Standard atmospheres for conditioning and testing

ISO 306, Plastics — Thermoplastic materials — Determination of Vicat softening temperature (VST)

ISO 527­1, Plastics — Determination of tensile properties — Part 1: General principles

ISO 527­2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and

extrusion plastics

ISO 1183­1, Plastics — Methods for determining the density of non-cellular plastics — Part 1: Immersion

method, liquid pycnometer method and titration method

ISO 1183­2, Plastics — Methods for determining the density of non-cellular plastics — Part 2: Density

gradient column method

ISO 2039­1, Plastics — Determination of hardness — Part 1: Ball indentation method

ISO 2818, Plastics — Preparation of test specimens by machining

ISO 6603­1, Plastics — Determination of multiaxial impact behaviour of rigid plastics — Part 1: Falling

dart method

ISO 1043­1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special

characteristics

ISO 11501, Plastics — Film and sheeting — Determination of dimensional change on heating

ISO 19063­1, Plastics — Impact-resistant polystyrene (PS-I) moulding and extrusion materials — Part 1:

Designation system and basis for specifications
3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
© ISO 2021 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO/FDIS 14631:2021(E)
— IEC Electropedia: available at http:// www .electropedia .org/
4 Material

Sheets shall be made of PS-I extrusion compounds designated by ISO 19063-1 without filler and

reinforcing material. Extrusion compounds can contain additives such as processing aids, stabilizers,

flame protective agents and colorants. Compounds and additives of unknown identity shall not be used.

NOTE Legal
...