GB/T 18426-2021Rubber-or plastics-coated fabrics - Low-temperature bend test (English PDF)

Foreword

This document is drafted in accordance with GB/T 1.1-2020 "Directives for

standardization - Part 1: Rules for the structure and drafting of standardizing

documents".

This document replaces GB/T 18426-2001 "Rubber or plastics-coated fabrics - Low-

temperature bend test". Compared with GB/T 18426-2001, the main technical changes

are as follows:

- Change normative references (see Clause 2; Clause 2 of the 2001 edition);

- Add Clause "Terms and definitions" (see Clause 3);

- Change Figure 1, Figure 2 and the marking method; correct the dimension of part

H of the test device bending jig in Figure 2 (see Clause 5; Clause 4 of the 2001

edition);

- Change the magnification for examining the cracks on the coated surface (see 9.4;

1 Scope

This document specifies a method for determining the ability of fabrics coated with

rubber or plastics to resist the effect of low temperature when subjected to bending at

specified temperatures after definite periods of exposure. This document is applicable

to coated fabrics with a thickness within the range 0.1 mm to 2.2 mm. For materials of

greater thickness than this, modifications to the standard equipment apply (see 9.2,

second paragraph).

Because fabrics coated with rubber or plastics are used in different applications

requiring low temperature flexing, this test cannot be used as the only standard to

determine their service performance.

2 Normative references

The contents of the following documents, through normative references in this text,

constitute indispensable provisions of this document. Among them, for dated references,

only the edition corresponding to that date applies to this document. For undated

references, the latest edition (including all amendments) applies to this document.

ISO 2231 Rubber- or plastics-coated fabrics - Standard atmospheres for conditioning

and testing

ISO 2286-3 Rubber- or plastics-coated fabrics - Determination of roll characteristics

- Part 3: Method for determination of thickness

3 Terms and definitions

No terms and definitions are listed in this document.

ISO maintains terminological databases for use in standardization at the following

address:

......