QB/T 2726-2005 PDF in English
QB/T 2726-2005 (QB/T2726-2005, QBT 2726-2005, QBT2726-2005)
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| QB/T 2726-2005 | English | 70 |
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Leather. Physical and mechanical tests. Determination of abrasion resistance
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Standards related to (historical): QB/T 2726-2005
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QB/T 2726-2005: PDF in English (QBT 2726-2005) QB/T 2726-2005
LIGHT INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 59.140
Classification No.: Y 45
Filing No.: 15778-2005
Leather - Physical and mechanical tests -
Determination of abrasion resistance
ISSUED ON: MARCH 19, 2005
IMPLEMENTED ON: SEPTEMBER 01, 2005
Issued by: National Development and Reform Commission
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Principle ... 5
4 Equipment ... 5
5 Sampling and sample preparation ... 6
6 Procedure ... 7
7 Test report ... 8
Foreword
This Standard modifies the International Union of Leather Technologists and
Chemists Societies (IULTCS) standard IUP 48 “Measurement of abrasion
resistance of automotive leather”, which has been transformed by the
International Standardization Organization (ISO) to ISO/NP 17076:2004
“Leather - Physical and mechanical tests - Determination of abrasion resistance
of automotive leather”.
According to the actual situation in China, this Standard has undergone the
following technical changes when adopting the UP 48 standard:
- DELETE the word “automotive” in the standard name and scope, to expand
the scope of application of the standard;
- In “Normative references”, CHANGE the originally referenced UP
standards TO relevant standards of China;
- DELETE the explanatory “NOTE” in “3 Principles”;
- CHANGE the explanatory description in 4.6 TO “NOTE”;
- In order to prevent incorrect understanding of the standard in use, DELETE
the reference “NOTE” in 5.2 of the original standard;
- For ease of use, ADD the commonly used number of revolutions for test in
6.2.4;
- DELETE Annex A (Instrument source).
This Standard has also undergone the following editorial changes:
- DELETE the foreword of the UP standard;
- CHANGE the word “this IULTCS standard” TO “this Standard”;
- REPLACE the comma “,” used as decimal point WITH the decimal point “.”.
This Standard was proposed by China National Light Industry Council.
This Standard shall be under the jurisdiction of National Technical Committee
on Leather Industry of Standardization Administration of China (SAC/TC 252).
Drafting organizations of this Standard: Zhejiang Kasen Industrial Co., Ltd.,
China Leather and Footwear Research Institute.
Main drafters of this Standard: Zhou Xiaosong, Xu Huaihai, Zhu Miaofeng, Shi
Leather - Physical and mechanical tests -
Determination of abrasion resistance
1 Scope
This Standard specifies the test method for the abrasion resistance of leather.
This standard applies to all kinds of leather that require abrasion resistance.
2 Normative references
The following documents contain the provisions which, through reference in this
Standard, become the provisions of this Standard. For dated references, their
subsequent amendments (excluding corrigendum) or revisions do not apply to
this Standard. However, the parties who enter into agreement based on this
Standard are encouraged to investigate whether the latest versions of these
documents are applicable. For undated reference documents, the latest
versions apply to this Standard.
GB 250-1995 Gray scale for assessing change in colour (idt ISO 105/A 02)
QB/T 2706 Leather - Chemical, physical and mechanical and fastness tests
- Sampling location
QB/T 2707 Leather - Physical and mechanical tests - Sample preparation
and conditioning
3 Principle
The sample is rotated on a horizontal platform. Two abrasive wheels are
pressed against the sample with a certain force. The axis of the abrasive wheels
is parallel to the horizontal plane, with one abrasive wheel facing outward and
the other facing inward. Within a certain period of time, record all changes in
the sample.
4 Equipment
4.1 Sample platform, rotates horizontally, with a speed of (60 ± 5) r/min.
4.2 Sample holder, flat, circular, removable.
6 Procedure
6.1 Preparation of new abrasive wheels
6.1.1 PREPARE new rubber abrasive wheels according to 6.1.2 ~ 6.1.8.
PREPARE new tungsten-carbide abrasive wheels according to 6.1.9.
6.1.2 FIT the rubber abrasive wheels to the pivoted arms (4.3), ensuring that
the side with the labels faces outward.
6.1.3 ADD the weights (4.7) so that the weight of each abrasive wheel is 1000
g.
6.1.4 SELECT the appropriate abrasive paper (4.10) and FIT it on the sample
holder.
6.1.5 PLACE the abrasive wheels onto the surface of the abrasive paper, TURN
ON the vacuum cleaner, SWITCH ON the machine, and RUN for 20 revolutions.
6.1.6 REPLACE the abrasive paper, REPEAT the operation of 6.1.5.
6.1.7 EXAMINE the abrasive wheels, if the color is inconsistent, reprocess with
new abrasive paper. If the color is still inconsistent, discard the abrasive wheel.
6.1.8 USE a soft brush or compressed air (4.11) to remove the debris on the
surface.
6.1.9 USE a stiff brush (4.12) to brush off the debris on the surface; PREPARE
new tungsten-carbide abrasive wheels.
6.2 Abrasion of sample
6.2.1 FIT the prepared new abrasive wheels (6.1) or the adjusted abrasive
wheels (6.3) to the pivoted arm (4.3), FIT them correctly, with the labels facing
outward.
6.2.2 SELECT the appropriate weight (4.7): 250 g, 500 g, or 100 g.
NOTE: The commonly used weight is 500 g, but the car manufacturer can specify the weight,
and the weight used shall be recorded in the test report.
6.2.3 FIT the sample on the sample holder.
6.2.4 PLACE the abrasive wheels onto the surface of the sample, TURN ON
the vacuum cleaner, SWITCH ON the machine, and operate with the specified
number of revolutions. It may choose from the following number of revolutions:
100, 250, 500, 1000, 2500, 5000.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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