GB/T 29868-2020Sports protective products—Knitted products general technical requirements (English PDF)

Foreword

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

This Standard replaces GB/T 29868-2013 "General technical criterion for knitted sports protection article". Compared with GB/T 29868-2013, the main changes are as follows:

-- Modify the scope of application of the standard (see Chapter 1; Chapter 1 of version 2013);

-- Modify and supplement normative references (see Chapter 2; Chapter 2 of version 2013);

-- Modify some indicators and specifications, including adding the color fastness to wet rubbing, changing the name of "metal hazards" to "sharp objects such as metal needle", changing the stretch and recovery rate assessment item "lateral" to "extending direction", and adding a description of the conditions for not evaluating the item (see Tables 1 and 3.3; Table 1 and 3.3 of version 2013);

-- Modify the stretch and recovery rate test method (see 4.9; 4.8 of version 2013).

1 Scope

This Standard specifies the basic technical requirements, detection methods and sampling rules for knitted sports protective products. Other requirements for sports protective products shall be implemented in accordance with relevant product standards.

This Standard applies to knitted sports protective products whose main raw material is textile fiber, which are knitted by knitting technology or are made of knitted fabric and polyurethane foam materials, including ankle guard, leg guard, kneecap, waist support, wrister, barcer, elbow pad, shoulder pad and headband.

This Standard does not apply to sports protective products for infants and young children aged 36 months and below.

2 Normative references

The following documents are indispensable for the application of this document.

For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 2912.1, Textiles - Determination of formaldehyde - Part 1: Free and hydrolyzed formaldehyde (water extraction method)

GB/T 3920, Textiles - Tests for colour fastness - Colour fastness to rubbing

GB/T 3922, Textiles - Tests for colour fastness - Colour fastness to perspiration

GB/T 5713, Textiles - Tests for colour fastness - Colour fastness to water

GB/T 7573, Textiles - Determination of pH of aqueous extract

GB/T 8170, Rules of rounding off for numerical values & expression and judgment of limiting values

GB/T 17592, Textiles - Determination of the banned azo colourants

GB/T 17593.1, Textiles - Determination of heavy metals - Part 1: Atomic absorption spectrophotometry

3 Basic technical requirements

3.3 For stretch and recovery, only cylindrical products that contain elastic materials such as spandex and rubber bands are assessed; products that are laminated with knitted fabrics and polyurethane foam are not assessed.

3.4 For the N-nitrosamine item, only test the rubber band that is used in protective clothing. The list of non-detectable N-nitrosamines is shown in Appendix A; the limit value is less than or equal to 0.5 mg/kg.

4 Test method