熔喷/干法纤网在线复合汽车吸音棉的生产工艺

The Application of Melt Blown/Dry-Laid Composite Web in Automobile Sound-Absorbing Material and its Process

为了实现熔喷/干法纤网复合汽车吸音棉的在线生产,以开发300 g/m2的复合吸音棉为例,对熔喷工艺、干法纤网工艺以及熔喷/干法纤网在线复合等内容进行了分析介绍。结果表明:采用熔融指数150 g/min的聚丙烯切片,并控制好模头温度、热空气喷射角、热空气压力、接收距离等熔喷工艺参数,采用纤度为3.3 dtex的三维卷曲涤纶中空短纤维和阻燃涤纶短纤维组成的干法纤网,纤网加入熔喷丝的角度在75～83°之间时,能够得到较好的复合吸音棉材料。

To realize the on-line production of melt blown-dry laid composite automobile sound-absorbing material,the 300 g/m2 nonwoven is developed and the processes of melt blown fiber,dry-laid web and lamination of melt blown dry-laid web are investigated.The result indicates that the perfect composite sound-absorbing material can be obtained with following conditions: polypropylene chip with melt index 150 g/min,controlled die temperature,regulated hot air pressure and collection distance for melt blowing,the dry-laid web using 3.3 dtex three dimensional crimp PET hollow staple fiber and flame retardant PET staple fiber for dry-laid web,the jet angle of melt blown fiber with the web is 75~83°.