(1) Polyimide fiber is a kind of high-performance fiber, and its thermal conductivity is similar to that of wool fiber, far lower than that of polyester fiber, it has excellent thermal performance. When the content of polyimide fiber is in the range of 0% ~ 55%, the floc can maintain its stability
The higher the content of polyimide fiber, the higher the cro value. Because of conditions, No
If the content of polyimide fiber continues to increase, the thermal insulation performance of polyimide wadding may be similar to that of polyester fiber like the floccule, it decreased.
(2) The fineness of polyimide fiber is similar to that of superfine fiber. Compared with conventional fiber, polyimide fiber has larger specific surface area and can adsorb fiber
After adding polyimide fiber into the floc, the original space structure of the floc was re separated, and the air was dissolved.
The flow channel is divided into more small channels, which reduces the fluidity of the air layer in the floc and reduces the air convection heat dissipation.
The heat preservation performance of the wadding is improved.
(3) With the increase of polyimide fiber content in the floc, the elasticity of the floc is weakened, the compression resilience performance is poor, and the volume is dense.
The durability of the thermal insulation performance of the wadding is affected by the decrease of the degree stability. Therefore, the content of polyimide fiber should be controlled in a certain range.
(4) The crimp fiber plays the role of skeleton support in the floc, and polyimide fiber is thin, soft, sticky and slippery, and cannot support the floc.
The addition of curved fiber makes the floc obtain the appropriate thickness, bulkiness and compression elastic properties, and maintains the air content of the floc.
It ensures that the wadding has a certain air permeability, so as not to make the wearer feel stuffy and uncomfortable.http://www.china-polyimide.com
