GB/T 23321-2009 in English

《GB/T 23321-2009纺织品 防水性 水平喷射淋雨试验》由TC209（全国纺织品标准化技术委员会）归口，TC209SC1（全国纺织品标准化技术委员会基础标准分会）执行，主管部门为中国纺织工业联合会。
本标准规定了测定织物抵抗一定冲击强度喷淋水渗透性的方法，通过测量织物抵抗喷淋水的渗透性来预测其抗雨水的渗透性能。本方法也可在不同冲击强度的喷淋水作用下对织物进行测试，并绘制完整的织物抗渗透性曲线。
本标准适用于各种经过及未经过防水（或拒水）后整理的纺织织物，特别适用于具有较强防水性能的织物。

Textiles — Water resistance — Rain tests: exposure to a horizontal water spray

1 Scope

This standard specifies the method for measuring the penetration resistance of fabrics to spray water with a certain impact strength. The penetration resistance of fabrics to rain can be predicted by measuring the penetration of fabrics to spray water. This method can also be used to test the fabrics under the action of spray water with different impact strength, and draw a complete penetration resistance curve of the fabrics.

This standard is applicable to any textile fabric, which may or may not have been given a water-resistant or water-repellent finish, especially to fabrics with strong water resistance.

2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.

GB/T 6529 Textiles — Standard atmospheres for conditioning and testing (GB/T 6529-2008, ISO 139:2005, MOD)

3 Term and definition

For the purposes of this standard, the following term and definition applies.

3.1
water resistance
characteristic indicating the ability to resist wetting and penetration by water

4 Principles

A test specimen, backed by a weighed blotter, is sprayed with water for 5 min under controlled conditions. The blotter is then reweighed to determine the mass of water which has leaked through the specimen during the test.

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Principles
5 Safety precautions
6 Apparatus
7 Test specimens
8 Procedure
9 Calculation of results
10 Test report