China’s requirements for textile combustion properties

4.1.2 GB 8965.1-2009 “Protective clothing – Flame retardant protection – Part 1: Flame retardant clothing”</p

4.1.2.1 Product classification<br /
　　该标准规定了阻燃服的技术要求、检验（测试）方法、检验规则、标志、包装和贮存。阻燃防护服分为A、B、C三个级别。

<br /
　　a) A级适用于服用者从事有明火、散发火花、在熔融金属附近操作有辐射热和对流热的场合穿用的阻燃服。A级阻燃防护服的材料要求见表4-3和4-4。
　　b) B级适用于服用者从事在明火、散发火花、有易燃物质并有发火危险的场所穿用的阻燃服。B级阻燃防护服的材料要求见表4-3和4-4。
　　c) C级适用于临时、不长期使用的服用者从事在有易燃物质并有发火危险的场所穿用的阻燃服。C级阻燃防护服的材料要求见表4-3和4-4。

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4.1.2.2 Combustion performance requirements<br /
　　在该标准中对阻燃防护服使用的面料、缝纫线、附件、辅料和衬布分别提出了燃烧性能要求� �面料的燃烧性能要求符合表4-3的规定，其中热防护系数按照G B 8965.1-2009 Appendix A assessment, other flame-retardant properties are assessed in accordance with GB/T5455; the combustion performance requirements of the sewing thread are that after the high-temperature oven is heated to 260°C and stabilized, 100m of flame-retardant sewing thread is put into the oven for 5 minutes and then taken out and sewn. There is no melting or scorching phenomenon in the wire; the combustion performance of accessories and auxiliary materials The requirements are that buckles, hooks, and zippers should not be made of fusible or flammable materials. If they must be used, their surfaces must be covered with flame-retardant clothing. Metal parts should not be in direct contact with the body. For example, if elastic materials are used, The coating material must be flame retardant. When lining must be used, the lining must not melt. Use reflective tape and other ingredients, which must be flame retardant materials. �</p

Table 4-3</p

<colgroup
<col
<col
<col
<col
</colgroup
<tbody
<t
<
Test items<
<
Protection level<
<
Indicators<
<
Washing times<
</t
<t
<td rowspan="
Thermal protection coefficient TPP/（kW.s/m2）<
<td rowspan="
A<
<
Direct skin contact: ≥126<
<td rowspan="
50<
</t
<t
<
There is a gap between skin and clothing: ≥250<
</t
<t
<
B<
<
—<
<
—<
</t
<t
<
C<
<
—<
<
—<
</t
<t
<td rowspan="
Afterburning time/s<
<
A<
<
≤2<
<td rowspan="
50<
</t
<t
<
B<
<
≤2<
</t
<t
<
C<
<
≤5<
<
12<
</t
<t
<td rowspan="
Smoldering time/s<
<
A<
<
≤2<
<td rowspan="
50<
</t
<t
<
B<
<
≤2<
</t
<t
<
C<
<
≤5<
<
12<
</t
<t
<td rowspan="
Damaged length/mm<
<
A<
<
≤50<
<td rowspan="
50<
</t
<t
<
B<
<
≤100<
</t
<t
<
C<
<
≤150<
<
12<
</t
<t
<
Melting, dripping<
<
A,B,C<
<
Not allowed<
<
—<
</t
<t
<td colspan="
注1：按照GB/T 17596-1998中第7章的洗涤条件洗涤12.5h，漂洗1.5h，漂洗过程中换水两次，然后脱水4min，整个过程为洗涤50次。

</t
<t
<td colspan="
按照GB/T 17596-1998中第7章的洗涤条件洗涤3h，漂洗0.5h，漂洗过程中换水两次，然后脱水4min，整个过程为洗涤12次。

</t
</tbody

</p

4.1.2.3 Intrinsic quality and appearance quality requirements<br /
　　该标准中对阻燃服内在质量和外观质量进行了规定。面料内在质量符合表4-4的要求。

Table 4-4</p

<colgroup
<col
<col
<col
</colgroup
<tbody
<t
<td colspan="
Project<
<
Indicators<
</t
<t
<td rowspan="
Breaking strength/N<
<
Before washing <
<
≥450<
</t
<t
<
After washing <
<
≥400<
</t
<t
<td colspan="
Tear strength (before washing)/N<
<
≥25<
</t
<t
<td colspan="
Moisture permeability/[g/(m2.24h)]<
<
≥6000<
</t
<t
<td colspan="
Bend length/cm<
<
≤3<
</t
<t
<td colspan="
Pilling/Level<
<
≥3<
</t
<t
<td colspan="
Washing dimensional change rate/%<
<
+2.5～-2.5<
</t
<t
<td colspan="
Thermal stability/%<
<
≤10<
</t
<t
<td rowspan="
色�Degree/Level

<
Washable (discoloration/staining)<
<
≥4/3-4<
</t
<t
<
Water resistant (discoloration/staining)<
<
≥4/3-4<
</t
<t
<
Resistant to dry friction<
<
≥3-4<
</t
<t
<
Resistant to wet friction<
<
≥3<
</t
<t
<
Resistant to sweat stains (discoloration/staining)<
<
≥3-4/3-4<
</t
<t
<td rowspan="
Formaldehyde content/(mg/kg)<
<
Direct contact with skin<
<
≤75<
</t
<t
<
Not in direct contact with skin<
<
≤300<
</t
<t
<
PH<
<
—<
<
4.0～9.0<
</t
</tbody