Preparation and performance of spunlace polyimide non-woven fabric for high-grade chemical protective clothing fabrics
Polyimide(PI)staple fiber was used as raw material to prepare non-woven fabrics by spunlace process,in order to be used as the skeleton layer of high-grade chemical protective cloth-ing fabrics.Scanning electron microscope(SEM),electronic fab-ric strength machine,fabric flame retardant performance tester,etc.,were used to study the effects of unit area mass(gram weight)on the microstructure,mechanical properties,flame retar-dant and chemical stability properties of non-woven fabrics.The results show that the non-woven fabric with a gram weight of 100 g/m2 has good comprehensive properties,and has a longitudinal breaking strength of 448 N and a cross breaking strength of 102 N.It has excellent high/low temperature resistance.There is no continuous combustion and smoldering phenomenon,no melt droplet dripping,and the longitudinal and transverse damage length is less than 2 mm,which has excellent flame retardant per-formance.It still has good mechanical properties after being soaked in 30%hydrochloric acid,40%nitric acid and 20%so-dium hydroxide.In summary,the preparation of polyimide non-woven fabrics by spunlace process as the skeleton layer of chemi-cal protective clothing has significant advantages.
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