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GB/T 3903.8-2022 English PDF (GBT3903.8-2022)

GB/T 3903.8-2022 English PDF (GBT3903.8-2022)

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GB/T 3903.8-2022: Footwear -- Test methods for insoles -- Delamination resistance

This document describes a method for the determination of the delamination resistance of footwear insole materials. This document applies to shoe insoles made of various materials.
GB/T 3903.8-2022
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 61.060
CCS Y 78
GB/T 3903.8-2022 / ISO 20866:2018
Replace GB/T 3903.8-2005
Footwear - Test methods for insoles - Delamination
resistance
(ISO 20866:2018, IDT)
ISSUED ON: OCTOBER 12, 2022
IMPLEMENTED ON: MAY 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Instruments, equipment, and materials ... 6
5 Sampling and environmental conditioning ... 7
6 Test method ... 7
7 Result presentation ... 9
8 Test report ... 9
References ... 10
Foreword
This document is drafted in accordance with the provisions of GB/T 1.1-2020 ?€?Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents?€?.
This document replaces GB/T 3903.8-2005 ?€?Footwear - Test methods for insoles - Delamination resistance?€?. Compared with GB/T 3903.8-2005, except for the structural adjustment and editorial changes, the main technical content changes are as follows: a) The scope of application of the standard is added (see Chapter 1);
b) The normative references are changed (see Chapter 2; see Chapter 2 of the 2005 edition);
c) The terminology database address is added (see Chapter 3; see Chapter 3 of the 2005 edition);
d) The definition of delamination resistance is changed (see 3.1; see 3.1 of the 2005 edition);
e) The test report requirements are changed (see Chapter 8; see Chapter 8 of the 2005 edition).
This document is identical to ISO 20866:2018 ?€?Footwear - Test methods for insoles - Delamination resistance?€?.
The following minimal editorial changes have been made to this document: --- The Note 1) is added in 4.8, which gives additional instructions on distilled water; --- A note is added in 6.2 to explain the pressing time;
--- The Note 1) in 7.1 of ISO 20866:2018 is changed to Note 2);
--- Notes are added in 7.1 and 7.2 to explain the rounding of the test results. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document is proposed by China National Light Industry Council.
This document shall be under the jurisdiction of the National Technical Committee on Footwear of Standardization Administration of China (SAC/TC305).
Footwear - Test methods for insoles - Delamination
resistance
1 Scope
This document describes a method for the determination of the delamination resistance of footwear insole materials.
This document applies to shoe insoles made of various materials.
2 Normative references
The following documents contain the provisions which, through normative reference in this document, constitute the essential provisions of this document. For the dated referenced documents, only the versions with the indicated dates are applicable to this document; for the undated referenced documents, only the latest version (including all the amendments) is applicable to this document.
ISO 5893 Rubber and plastics test equipment - Tensile, flexural and compression types (constant rate of traverse) - Specification
Note: GB/T 17200-2008 Technical specification for tensile, compression and flexural testing machines for rubber and plastics (constant rate of traverse) (ISO 5893:2002, IDT) ISO 17709 Footwear - Sampling location, preparation and duration of conditioning of samples and test pieces
Note: GB/T 22050-2008 Footwear - Sampling location, preparation and duration of conditioning of samples and test pieces (ISO 17709:2004, IDT)
ISO 18454 Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear
Note: GB/T 22049-2019 Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear (ISO 18454:2018, IDT)
3 Terms and definitions
The following terms and definitions apply to this document.
The addresses of terminology databases maintained by ISO and IEC for standardization are as follows:
--- ISO online browsing platform: https://www.iso.org/obp;
--- IEC Electronic Development Platform: http://www.electropedia.org/.
3.1 delamination resistance
The force per unit area required to delaminate the internal structure of the insole material.
4 Instruments, equipment, and materials
The following equipment and materials shall be used.
4.1 Tensile-testing machine (dynamometer): It shall be in accordance with the requirements of ISO 5893, the accuracy level shall be B, and the constant moving speed shall be 25 mm/min??5 mm/min.
4.2 Pair of solid cylinders: Each cylinder with a diameter of 38.92 mm??0.02 mm shall have a device connected to the tensile-testing machine. The end faces of the cylinders shall be perpendicular to their axes. The cylinders shall be adapted to the tensile-testing machine so that the force of the tensile-testing machine passes through the axes of the two cylinders. One pair of cylinders is required for each sample.
4.3 Collar: It shall have an inner diameter of 39.00 mm??0.03 mm to ensure that the cylinder and the sample are coaxial during assembly.
4.4 Circular knife cutting die: It is used to cut circular samples with a diameter of 38.0 mm??1.0 mm. The inner surface of the cutting die shall be angled approximately 5?? outward from the cutting edge so that the knife will not damage the edge of the sample when sampling.
4.5 Pressing device or similar equipment: It shall be capable of applying a pressure of 5.00 kN??0.25 kN when the cylinder is bonded to the sample.
4.6 Vernier caliper: The accuracy shall be 0.1 mm.
4.7 Polymer adhesive: It shall be the solvent-based chloroprene, rubber type. Note: Suitable adhesives are mostly chloroprene rubber sole-lamination adhesives and commercially available household chloroprene rubber impact adhesives.
4.8 Distilled water1).
7 Result presentation
7.1 Dry test
The average value of the maximum tensile force recorded in the three dry tests is divided by the average value of the areas (single side) of the three samples. The result is expressed in megapascals (MPa)2) as the delamination resistance of the insole material.
Note:
2) 1 Mpa = 1 N/mm2.
The test results are generally accurate to 0.1 MPa or subject to product standards. 7.2 Wet test
The average value of the maximum tensile force recorded in the three wet tests is divided by the average value of the areas (single side) of the three samples. The result is expressed in megapascals (MPa) as the delamination resistance of the wet insole material.
Note: The test results are generally accurate to 0.1 MPa or subject to product standards. 8 Test report
The test report shall include the following contents:
a) The number of the adopted document;
b) The test results expressed in accordance with Chapter 7;
c) The material and detailed description of the sample;
d) If necessary, the preparation process of the sample shall be described; e) The test method used (dry test or wet test);
f) Any deviation from the test procedures of this document;
g) The test date;
h) Standard environmental conditions observed during the test.

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