Plastics — Determination of resistance to wear by abrasive wheels

1.1 This International Standard specifies a general method for determining the resistance to abrasive wear of plastics under the action of abrasive wheels. It is equally applicable to moulded test specimens, components and finished products. 1.2 The particular test conditions and the method of expressing the results may differ according to the type of material. The test conditions and specific method are specified in the relevant standards for each material or product. This method is not applicable to cellular materials or paints.

Plastiques — Détermination de la résistance à l'usure par galets abrasifs

General Information

Status
Published
Publication Date
12-Apr-2012
Current Stage
9093 - International Standard confirmed
Start Date
01-Dec-2017
Completion Date
19-Sep-2022
Ref Project

RELATIONS

Buy Standard

Standard
ISO 9352:2012 - Plastics -- Determination of resistance to wear by abrasive wheels
English language
9 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

INTERNATIONAL ISO
STANDARD 9352
Third edition
2012-04-15
Plastics — Determination of resistance to
wear by abrasive wheels
Plastiques — Détermination de la résistance à l’usure par galets abrasifs
Reference number
ISO 9352:2012(E)
ISO 2012
---------------------- Page: 1 ----------------------
ISO 9352:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,

electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s

member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 9352:2012(E)
Contents Page

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

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

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

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

4 Principle ................................................................................................................................................................. 2

5 Apparatus .............................................................................................................................................................. 2

6 Test specimens .................................................................................................................................................... 5

6.1 Shape and dimensions ...................................................................................................................................... 5

6.2 Preparation of test specimens ......................................................................................................................... 5

6.3 Cleaning of test specimens .............................................................................................................................. 5

6.4 Number of test specimens ................................................................................................................................ 5

7 Conditioning of test specimens ...................................................................................................................... 5

8 Procedure .............................................................................................................................................................. 5

9 Expression of results ......................................................................................................................................... 6

10 Precision ................................................................................................................................................................ 6

11 Test report ............................................................................................................................................................. 7

Annex A (normative) Determination of the abrasive power of the abrasive wheels ........................................ 8

Bibliography ....................................................................................................................................................................... 9

© ISO 2012 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 9352:2012(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

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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

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.

ISO 9352 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical properties.

This third edition cancels and replaces the second edition (ISO 9352:1995), which has been technically revised.

iv © ISO 2012 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 9352:2012(E)
Plastics — Determination of resistance to wear by abrasive wheels
1 Scope

1.1 This International Standard specifies a general method for determining the resistance to abrasive wear

of plastics under the action of abrasive wheels. It is equally applicable to moulded test specimens, components

and finished products.

1.2 The particular test conditions and the method of expressing the results may differ according to the type of

material. The test conditions and specific method are specified in the relevant standards for each material or product.

This method is not applicable to cellular materials or paints.
2 Normative references

The following referenced documents are indispensable for the application 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 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD

and 100 IRHD)
ISO 291, Plastics — Standard atmospheres for conditioning and testing

ISO 293, Plastics — Compression moulding of test specimens of thermoplastic materials

ISO 294-1, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 1: General

principles, and moulding of multipurpose and bar test specimens

ISO 295, Plastics — Compression moulding of test specimens of thermosetting materials

ISO 2818, Plastics — Preparation of test specimens by machining
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
abrasive wheel
small grinding wheel or a roller faced with abrasive paper
3.2
abrasive wear

progressive loss of material from the operating surface of a plastics material resulting from the cutting or

scratching action of the abrasive wheel
© ISO 2012 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO 9352:2012(E)
4 Principle

Two abrasive wheels are applied to the test specimen with a specified load. The wear obtained after rotation

of the test specimen through a specified number of revolutions is assessed by an appropriate procedure (e.g.

mass loss, volume loss, change in optical properties).
5 Apparatus
5.1 Abrasion test machine.

5.1.1 The test specimen is placed on a motor-driven rotating disc. A pair of abrasive wheels is allowed to turn

freely on their axis and is applied to the test specimen at a specified position under a specified load. Figure 1

illustrates the relative positions of these different components. The apparatus shall comply with the requirements

given in 5.1.2 to 5.1.7.

5.1.2 The test specimen support disc shall be flat and fixed to its driving shaft. When the disc is rotated,

no point on a 45 mm radius circle traced on its horizontal surface shall oscillate vertically through more than

0,05 mm about its mean position. The disc shall have a nominal diameter of 100 mm and its speed of rotation

shall be 72 rev/min at 60 Hz and 60 rev/min at 50 Hz.

5.1.3 The abrasive wheels shall be supported by two symmetrical arms that can oscillate freely about a

horizontal axis. The method of attaching the wheels shall permit free rotation, e.g. by means of ball bearings. In

the test position, the mounting bosses shall be coaxial and positioned in such a way that the vertical projection

of their common axis on to the plane of the test specimen support disc is 19,1 mm ± 0,1 mm from a parallel line

passing through the axis of the disc (see Figure 1).

The distance between the inside faces of the abrasive wheels shall be 52,4 mm ± 0,2 mm.

Each arm shall be constructed in such a way as to permit the fitting of a counterweight to balance its mass

against that of the abrasive wheel and additional loads of known mass (see 5.4).

5.1.4 The abrasive wheels shall have a cylindrical shape. They shall contain an axial hole allowing them to be

fitted without play to the mounting bosses in the arms.
They shall consist of one of the following two alternatives:

a) An abrasive material (abrasive wheels). The thickness of the wheels shall be 12,7 mm ± 0,1 mm and their

external diameter 51,6 mm ± 0,1 mm when new, but in no case less than 44,4 mm.

b) A metal disc with its periphery clad with a 6 mm layer of vulcanized rubber of hardness 50 IRHD to

55 IRHD (international hardness in accordance with ISO 48) bonded without gaps or overlap with a strip

of abrasive paper (for example, secured with the aid of double-sided adhesive tape). The abrasive wheel

shall have a thickness of 12,7 mm ± 0,2 mm and a diameter of 51,6 mm ± 0,2 mm. The width of the abrasive

paper shall be as specified in the relevant material (or product) standard.

The quality of the abrasive wheel or abrasive paper to be used shall be as stated in each relevant material (or

product) specification. Refer to Table 1 for guidance in selecting suitable abrasive wheels. The abrasive-power

properties of the wheels may be characterized, if requested, by the procedure give in Annex A.

5.1.5 The vacuum device for removal of the wear debris shall include two exhaust nozzles above the test

specimen wear zone. One nozzle shall be located between the abrasive wheels and the other shall be located

diametrically opposite (see Figure 1). The bore of each nozzle shall have an internal diameter of 8 mm ± 0,5 mm

and its distance from the test specimen shall be maintained at 1,5 mm ± 0,5 mm. When the nozzles are blocked

closed, the pressure shall be 1,5 kPa to 1,6 kPa.
2 © ISO 2012 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 9352:2012(E)
Table 1 — Abrasive wheel selection chart
Recommended Approximate
load range grit size
Series
Abrasive action Wheel type Composition
designation
(No. of abrasive
particles/cm )
Rubber and
CS10F Very mild Resilient 2,5 to 4,9 1 420
abrasive grain
Rubber and
CS10 Mild Resilient 4,9 to 9,8 1 420
abrasive grain
Rubber and
CS17 Coarse Resilient 4,9 to 9,8 645
abrasi
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.