GB/T 7742.2-2015Textiles -- Bursting properties of fabrics -- Part 2: Pneumatic method for determination of bursting strength and bursting distension (English PDF)

Foreword

GB/T 7742 "Textiles - Bursting properties of fabrics" consists of the following 2

parts.

- Part 1. Hydraulic method for determination of bursting strength and bursting

distension;

- Part 2. Pneumatic method for determination of bursting strength and

bursting distension

This Part is the second part of GB/T 7742.

This Part was drafted in accordance with the rules given in GB/T 1.1-2009.

This Part uses redrafting method to modify and adopt ISO 13938-2.1999

"Textiles. Bursting properties of fabrics. Pneumatic method for determination of

bursting strength and bursting distension" (English version). Compared with

ISO 13938-1.1999, the main differences are as follows.

- International standards in normative references were replaced by

corresponding national standards;

- 6.1 and its subordinate terms of the International standard were modified

as 6.1 ~ 6.8;

- 10.1 and 10.2 of the International standard were modified as 10.2 and

10.3; added "the plane that is in contact with diaphragm" in 10.2 g).

This Part was proposed by China National Textile and Apparel Council.

This Part shall be under the jurisdiction of National Technical Committee for

Textile Standardization (SAC/TC 209).

The drafting organizations of this Part. Wenzhou Darong Textile Instrument Co.,

Ltd., Textile Industry Standardization Institute, Wenzhou Fangyuan Instrument

Co., Ltd., and China Textile Standard (Beijing) Test and Certification Center Co.,

Ltd.

Main drafters of this Part. Zhang Mengsheng, Zhang Hui, Xu Lu, Zheng Yuying

and Zhu Kechuan.

Textiles - Bursting properties of fabrics - Part 2.

Pneumatic method for determination of bursting

strength and bursting distension

1 Scope

This Part of GB/T 7742 specified pneumatic method for determination of

bursting strength and bursting distension, including programs of bursting

property determination by humidifying and wetting sample.

Note. Pneumatic method is specified in Part 1 of GB/T 7742.

This Part is applicable to knitted fabric, woven fabric, nonwoven fabric and

laminated fabric, as well as a variety of fabrics manufactured by other

processes.

Available data suggest that there are no significant differences between results

of bursting strength obtained by hydraulic and pneumatic bursting instruments

when pressure does not exceed 800kPa. This pressure range includes the

performance level of most common clothing. Hydraulic method is more

applicable for special textile products that require greater bursting pressure.

2 Normative references

The following referenced documents are indispensable for the application of

this document. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any

amendments) applies.

GB/T 6529 Textiles - Standard atmospheres for conditioning and testing

GB/T 6682 Water for analytical laboratory use - Specification and test

methods

GB/T 19022 Measurement management systems - Requirements for

measurement processes and measuring equipment

5 Sampling

Sampling shall be in accordance with provisions of product standard or

agreement of related parties. If there is no provision in product standard, as an

example, a suitable method of selecting sampling part is offered in Appendix A.

Sampling shall not be conducted at the folded part, the wrinkled part, selvage

or the part which cannot represent fabric. In general, the holding system can be

used for test without cutting sample.

6 Apparatus