柔性阻燃聚酰胺湿法涂层织物的制备及其性能

为解决不溶性颗粒型阻燃剂造成聚酰胺湿法涂层织物手感偏硬,阻燃效果较差等问题,将可溶性9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)引入聚酰胺6/甲醇-氯化钙浆料体系中,通过涂覆、水交换成膜、烘干等湿法涂层工艺,最终在织物表面构建DOPO均匀分散、光滑平整的多孔轻薄聚酰胺涂层。研究了DOPO和颗粒型阻燃剂对聚酰胺6/甲醇-氯化钙浆料体系流体性质的影响,对比测试了所制涂层织物的阻燃性能和硬挺度。结果表明:DOPO改变了溶液的流变性质,但不会明显提升体系的剪切黏度,有利于涂覆加工;DOPO阻燃聚酰胺6涂层织物的极限氧指数和硬挺度较颗粒型阻燃剂阻燃涂层织物有明显提升。

Preparation and properties of flexible flame retardant polyamide coated fabric via wet coating

In order to address the poor performance of polyamide coated fabric's hand feel and flame retardant properties, caused by insoluble particulate flame retardant, the research introduced 9,10-dihydrogen-9-oxygen hybrid-10-phosphorus hexafil-10-oxide (DOPO) into the polyamide/methanol-calcium chloride solution. A porous, light and thin polyamide coating with DOPO uniformly dispersed, and a smooth and flat surface coating on the fabric were created on the fabric via wet coating which including coating, water exchange into film and drying process. The effects of DOPO and particulate flame retardants on the fluid properties of the polyamide/methanol-calcium chloride solution system were investigated and compared. The results show that DOPO changes the rheological properties of the solution, but does not significantly increase the shear viscosity of the system, which is beneficial to coating processing. According to the test of flame retardant properties and stiffness, it was found that DOPO can effectively improve the flame retardant properties of the coated fabric and retain the flexibility of the fabric compared to the flame retardant particles.