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This standard is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization — Part 1: Rules for the structure and drafting of standardizing documents.
This standard replaces GB/T 26703-2011 Determination of abrasion resistance for top piece of leather shoes — Rotation cylindrical drum method. In addition to a number of structural adjustments and editorial changes, the following main technical changes have been made with respect to GB/T 26703-2011:
a) The test methods used in the scope have been modified (see Clause 1 herein; Clause 1 of Edition 2011);
b) The normative references have been modified (see Clause 2 herein; Clause 2 of Edition 2011);
c) The terms and definitions have been added (see Clause 3);
d) The apparatus and materials for method B have been added (see 4.2);
e) The requirements for the test surface of specimens have been modified (see 5.1.2.4 herein; 4.2.4 of Edition 2011);
f) The requirements of method B for specimens have been added (see 5.2);
g) The test procedure of method B has been added (see 6.2);
h) The rounding off of the results of method A has been added (see 7.1.3);
i) The test results of method B have been added (see 7.2).
Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This standard was proposed by the China National Light Industry Council.
This standard is under the jurisdiction of the National Technical Committee on Footwear of Standardization Administration of China (SAC/TC 305).
The previous editions of this document and documents replaced by this document are as follows:
——This standard was first issued as GB/T 26703-2011;
——This edition is the first revision.
Determination of abrasion resistance for top piece of leather shoes
1 Scope
This standard describes two methods for determination (Method A and Method B) of abrasion resistance for top piece of leather shoes. Method A is the rotation cylindrical drum method. Method B is the reciprocating method.
This standard is applicable to the general top piece of leather shoes (hereinafter referred to as "top piece").
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 dated edition is applicable to this standard. For undated references, the latest editions of the normative documents (including all the amendments) are applicable to this standard.
GB/T 533-2008 Rubber vulcanized or thermoplastic — Determination of density
GB/T 2703-2017 Footwear — Vocabulary
ISO 4649:2017 Rubber, vulcanized or thermoplastic — Determination of abrasion resistance using a rotating cylindrical drum device
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 2703-2017 apply.
4 Apparatus and materials
4.1 Method A — Rotation cylindrical drum method
4.1.1 Rotating cylindrical drum device
The rotating cylindrical drum device shall meet the requirements of ISO 4649:2017, 5.1, and apply non-rotating fixture.
4.1.2 Abrasive cloth
The abrasive cloth shall meet the requirements of ISO 4649:2017, 5.2.
4.1.3 Balance
The balance used to weigh the specimen mass shall be accurate to 1 mg.
4.1.4 Standard rubber
The standard rubber shall meet the requirements of ISO 4649:2017, Annex B, B.2.
4.1.5 Rotary cutter
The rotary cutter shall meet the requirements of ISO 4649:2017, 5.3.
4.1.6 Grinder for top piece
The grinder is used to grind the top piece into a cylindrical specimen with a diameter of (16.0 ± 0.2) mm.
See Annex A for the description of the grinder for top piece.
4.2 Method B — Reciprocating method
4.2.1 Reciprocating abrasion test device for top piece
4.2.1.1 See Figure 1 for the structure of reciprocating abrasion test device for top piece.
In mm
Keys:
1——Weight;
2——Abrasion hammer;
3——Top piece specimen;
4——Abrasive cloth;
5——Fixture for abrasive cloth.
Figure 1 Schematic diagram of reciprocating abrasion test device for top piece
4.2.1.2 Abrasion distance: (100 ± 2) mm.
4.2.1.3 Abrasion frequency: (60 ± 2) times/min, and a reciprocation is recorded as one time.
4.2.1.4 Abrasion hammer: the lower end which is used to fix the specimen should be spike-toothed. See Annex B for the description of the spike teeth of abrasion hammer.
4.2.1.5 Load: the load specified in Table 1 may be applied by adjusting the weight.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Apparatus and materials
5 Specimen
6 Test procedure
7 Test results
8 Test report
Annex A (Informative) Descriptions regarding the grinder for top piece
Annex B (Informative) Descriptions regarding the spike teeth for fixing specimens
