Total mass: 3.5kg
Damaged length: less than or equal 100mm
after-flame time: less than or equal 2s, without fusion dropping.
Shrinkage rate: less than or equal 5%
Tensile strength of outer layer: Â equal or greater than 100N;
Moisture barrier: hydrostatic pressure of 50kPa.
Moisture permeability ratio:  equal or greater than 5000g/(m² 24H);
Oil repellent grate: Level 3 and above
