Loading patent…
AssigneeOji Paper Co., Ltd.
InventorsShigeru Yamagata, Ryoetsu Sakurabashi, Hisanori Yagi, Mitsutoshi Ogata, Akihiko Kojima
Estimating the term…
The problem to be solved is to provide an automobile interior headliner member which is improved in the film forming property of a complex plastic material used as a base material of the automobile interior headliner member, and has high rigidity and excellent heat resistance, size stability and working efficiency upon attachment; and the base material. An automobile interior headliner molding or forming member which is obtained by kneading mica having a particle size of 10 to 100 μm with a polypropylene resin having a melt flow rate at 230° C. of 3 to 40 g/10 min to obtain the corresponding resin having a mica content of 15 to 40 wt. %, molding or forming the resin into a mica-containing polypropylene sheet of 100 to 300 μm thick and then stacking this sheet over each of both sides of an expanded polypropylene sheet of 2 to 6 mm thick obtained at an expansion ratio of 5 to 50 times; and an automobile interior headliner member molded or formed from the molding or forming member.
An automobile interior headliner molding or forming member comprising a three-layer complex plastic sheet material formed of an expanded polypropylene sheet and mica-containing polypropylene sheets stacked on both sides of said expanded polypropylene sheet, said three-layer complex plastic sheet material is obtained by kneading mica having a particle size of 10 to 100 μm and a polypropylene resin having a melt flow rate of 3 to 40 g/10 min as measured at a testing temperature of 230 ° C. under a test load of 21.18 N, forming the resulting mica-containing resin having a mica content of 15 to 40 wt. % into a mica-containing polypropylene sheet having a thickness of 100 to 300 μm and then stacking the mica-containing polypropylene sheet over each of the both sides of the expanded polypropylene sheet having an expansion ratio of 5 to 50 times and a thickness of 2 to 6 mm.
Dependencies are inferred from the claim text.