GB/T 7742.2-2015 in English

《GB/T 7742.2-2015纺织品 织物胀破性能 第2部分：胀破强力和胀破扩张度的测定 气压法》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。
GB/T7742的本部分规定了测定织物胀破强力和胀破扩张度的气压方法,包括测定调湿和浸湿两种试样胀破性能的程序。
注:液压法在 GB/T7742的第1部分中规定。
本部分适用于针织物、机织物、非织造布和层压织物,也适用于由其他工艺制造的各种织物。
现有数据表明,当压力不超过800kPa时,采用液压和气压两种胀破仪器得到的胀破强力结果没有
明显差异。这个压力范围包括了大多数普通服装的性能水平。对于要求胀破压力较高的特殊纺织品,
液压法更为适用。

1 Scope

This part of GB/T 7742 describes the pneumatic method for the determination of bursting strength and bursting distension of textile fabrics, including the procedures for determining the bursting properties of test specimens in conditioned and wet state.

Note: the Part 1 of GB/T 7742 describes a method using hydraulic pressure.

This part is applicable to knitted, woven, nonwoven and laminated fabrics. It may be suitable for fabrics produced by other techniques.

From the available data, there appears to be no significant difference in the bursting strength results achieved using hydraulic or pneumatic burst testers, for pressures up to 800kPa. This pressure range covers the majority of performance levels expected of general apparel. For special textiles requiring high bursting pressures, the hydraulic method is more suitable.

2 Normative references

The following referenced documents are indispensable for the application of this part. 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

Foreword I
1 Scope
2 Normative references
3 Definitions
4 Principle
5 Sampling
6 Apparatus
7 Atmospheres for conditioning and testing
8 Test procedure
9 Calculation and expression of results
10 Test report
Annex A (Informative) Selection of position of test specimens