Para Aramid Thread

1. Excellent heat resistance. There is no obvious strength loss at a temperature of 180℃(350℉).

2. High strength. Para aramid is nearly two and a half times as strong as nylon and polyester. And it is five times as strong as steel by same weight basis.

3. No melt, no drop of para aramid thread when burning. So secondary injury to body can be avoided when para aramid thread is applied.

B. Disadvantage

1. Limited stretch. The breaking elongation of para aramid thread is 2 to 3% only.

2. Poor UV resistance. The natural bright golden color of Kevlar thread turns to dark at a fast speed when exposed to sun light. Its strength would be also affected if exposed for a long period. (Attention should be paid in this regard. Well reserve your para aramid thread.)

3. Low color fastness if dyed. Normally para aramid threads come in natural golden or black color. Some other colors are achievable too such as red and green, but it depends on the specific color shade, as it is a much more challenge to dye Kevlar thread than cotton or nylon. Color fastness of yarn dyed para aramid thread is usually lower than Grade 3, which means the color would easily wash out or fade by light.