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GB/T 41937-2022: Rubber-or plastics-coated fabrics - Physical and mechanical tests - Determination of flex resistance by the flexometer method
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 41937-2022 | English | 279 |
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Rubber-or plastics-coated fabrics - Physical and mechanical tests - Determination of flex resistance by the flexometer method
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GB/T 41937-2022
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Basic data | Standard ID | GB/T 41937-2022 (GB/T41937-2022) | | Description (Translated English) | Rubber-or plastics-coated fabrics - Physical and mechanical tests - Determination of flex resistance by the flexometer method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G42 | | Classification of International Standard | 59.080.40 | | Word Count Estimation | 14,154 | | Date of Issue | 2022-12-30 | | Date of Implementation | 2023-04-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 41937-2022: Rubber-or plastics-coated fabrics - Physical and mechanical tests - Determination of flex resistance by the flexometer method
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 59.080.40
CCSG42
National Standards of People's Republic of China
Physical and Mechanical Properties Tests of Rubber or Plastic Coated Fabrics
Determination of bending resistance by deflection meter method
(ISO 32100.2018, MOD)
Posted on 2022-12-30
2023-04-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents"
drafting.
This document is modified to adopt ISO 32100.2018 "Physical and Mechanical Properties of Rubber or Plastic Coated Fabrics Tested with Flexometer Method for Determination of Flexibility
flexibility".
The technical differences between this document and ISO 32100.2018 and their reasons are as follows.
--- Replaced ISO 2231 (see 6.3 and 7.1) with the normatively quoted GB/T 24133 to adapt to my country's technical conditions, adding
Operability;
--- Added the size and tolerance of the fixture aperture at H in Figure 1 "ϕ6.5
0.5
0 or ϕ8.5
0.5
0 "to meet the fit of bolts and light holes,
Increase operability.
The following editorial changes have been made to this document.
---Changed the hole diameter label at the upper fixture F in Figure 1, and changed "ϕ6.0
-0.2 or ϕ8.0
-0.2" is corrected to "M6 or M8" (see 5.3);
--- In the upper right corner of Figure 1 and Figure 2, "general tolerances are determined according to the provisions of GB/T 1804, and the tolerance level is m level."
The form is moved above the footnote of the figure, and the content in brackets in the description of G in Figure 1 is moved out and expressed in the form of a paragraph in the figure (see 5.3, 6.1);
--- Replaced ISO 2768-1 with the informative referenced GB/T 1804 (see 5.3, 6.1);
---Move the descriptions of a)~d) in Figure 3 to the sub-picture questions of a)~d) (see 7.7).
Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China Petroleum and Chemical Industry Federation.
This document is sponsored by the National Rubber and Rubber Products Standardization Technical Committee Coated Products Sub-Technical Committee (SAC/TC35/SC10)
Focus on.
This document is drafted by. Shenyang Rubber Research and Design Institute Co., Ltd., Suzhou Wang Yongheng Silk Technology and Culture Co., Ltd., Yantai Sunny Rubber
Rubber Co., Ltd., Dongguan Cailong Plastic Technology Co., Ltd., Zhejiang Yihua Rubber Co., Ltd.
The main drafters of this document. Kong Bo, Zhang Zhenpeng, Wu Haisheng, Gao Weimin, Chang Hao, Liu Hongwei, Hu Xiaodong, Dai Wenxu, Han Lu, Cheng Lin,
Zhang Junjie.
Physical and Mechanical Properties Tests of Rubber or Plastic Coated Fabrics
Determination of bending resistance by deflection meter method
1 Scope
This document describes a test method for the determination of the flex resistance of rubber or plastics coated fabrics under folded conditions.
This method is applicable to the folds that can be clamped in the test device, and the folded folds can move back and forth along the sample during the test.
The number of flexures (see 3.2) or after the specified number of flexure cycles, the change in the appearance of the specimen is used as a measure of the resistance to flexure under the folded condition.
Glue or plastic coated fabric.
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document.
GB/T 24133 Standard environment for conditioning and testing of rubber or plastic coated fabrics (GB/T 24133-2009, ISO 2231.
1989, IDT)
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Flexcycle flexcycle
A cycle consisting of one forward and one backward (i.e., a complete reciprocating) movement of the movable grip in the test device.
3.2
flex number flexnumber
The number of flexing cycles (3.1) that the sample endures when the sample is damaged or has other visible changes when the sample is inspected with a magnifying glass of 6 times (by the relevant party)
agreement).
4 principles
Fold one end of the sample so that the test surface faces inward, clamp it on the upper (movable) fixture, fold the other end of the sample so that the test surface faces outward, and clamp it on the upper (movable) fixture.
on the lower (fixed) fixture. Wrinkles generated by the swing of the upper grip move along the specimen. Periodically inspect the specimen for damage or other visible changes.
5 instruments
5.1 Testing machine, including a swingable upper fixture, a fixed lower fixture and a counter, see descriptions in 5.1.1~5.1.3 and
Example of Figure 1.
5.1.1 The upper fixture consists of a pair of rotatable plates with a thickness of 4 mm, as shown in Figure 1.The small splint (H) is trapezoidal and has a
2mm round corners. The small splint has a cradle (G) for holding the folded specimen. The shape of the large splint (I) is shown in Figure 1.clamping bolt
(F) Holds the splints together and acts as a stop to prevent specimens from being misplaced. The design of the fixture should ensure that both
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