GB/T 38300-2019Protective clothing - Ensembles and garments for protection against cold (English PDF)

4.1.2 Ergonomic technical requirements

The design and production of protective clothing for protection against cold shall comply with the provisions of Chapter 4 of GB/T 20097-2006:

a) It shall be ensured that the materials and components of the protective clothing do not adversely affect the wearer.

b) While satisfying the protection requirements, it should make the wearer as comfortable as possible.

c) Excessive irritation or injury that is caused by rough, sharp angles and protruding parts shall be avoided when protective clothing comes into contact with the wearer's body.

d) Considering the influence of external factors and the possible movements and postures of the wearer during work, the protective clothing shall be designed to facilitate the correct wearing position and ensure that its position is maintained during the intended use period. Therefore, appropriate methods should be adopted to enable the protective clothing to adapt to the wearer's body shape, such as: suitable adjustment structure and suitable size range.

e) Without affecting the design strength and effect, minimize the mass of protective clothing.

f) The design of protective clothing should consider forming a comprehensive protective whole with other series of protective clothing or equipment after wearing. The connection between protective clothing and other protective equipment, such as the connection from sleeves to gloves, trousers to shoes, caps to respirators, should provide the same level of protection.

4.2 Resultant effective thermal insulation

The resultant effective thermal insulation of clothing is divided into 4 grades;

the classification is shown in Table 2.

4.6 Tear strength

The tear strength of the outer shell material in the warp and weft directions shall not be less than 25 N.

4.7 Clothing size

The design of clothing size is implemented according to the requirements of

5.1 Safety technical requirements

The basic safety technical requirements of clothing are tested in accordance with the methods that are specified in Chapter 6 of GB 18401-2010.

5.2 Resultant effective thermal insulation

The effective thermal insulation of clothing is tested in accordance with the static thermal manikin method that is specified in GB/T 18398-2001; the resultant effective thermal insulation of clothing is calculated according to the resultant effective thermal insulation of clothing by referring to Appendix A.

Refer to Appendix B for the reference thermal resistance value of the supporting clothing for the effective thermal resistance test of clothing.

5.3 Air permeability

The air permeability of clothing is tested in accordance with the method that is specified in GB/T 5453.

5.4 Resistance to water penetration

The resistance to water penetration of clothing is tested in accordance with the method that is specified in GB/T 4744.

5.5 Water-vapour resistance

The water-vapour resistance is tested according to the method that is specified in GB/T 11048-2018.

5.6 Tear strength

5.6.1

Fabrics which are not coated with rubber or plastic on the surface are tested in accordance with the method that is specified in GB/T 3917.4.

5.6.2

Fabrics which are coated with rubber or plastic on the surface shall be tested according to the method that is specified in Method A of HG/T 2581.1-

2009. The test speed is (100 ± 10) mm/min.