PURPOSE: To make it possible to form heat-resistant structural material by one shot by a method wherein specified reactive hot-melt adhesive is employed as the adhesive used between respective layers in lightweight interior trim structural material, which is prepared by laminating respectively a plurality of glass mat layers and of skin material layers on both sides of core material layer in the order named.
CONSTITUTION: In order to manufacture the lightweight interior trim structural material concerned, firstly, core material layer 1 made of thermoplastic polyurethane foamed sheet, which is obtained by reacting polyol component and isocyanate component with the each other in the presence of water and/or organic foaming agent, is brought into contact with water and/or water vapor. Next, a plurality of glass mat layers 2 and 2 and of skin material layers 3 and 4 are laminated to both the sides of core material layer 1 in the order named, the resultant laminate is formed under heat and pressure. In this case, as the adhesive employed between the respective layers 1-4, reactive hot melt adhesive containing polyurethane polymer having unreacted NCO group at its terminal is employed. Finally, all the laminate is integrally formed by being pressurized simultaneously.
NAKAYAMA MASATOSHI
USUI KIYOSHI
KUWABARA TADASHI
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