| 摘要 |
The present invention relates to a thin film polyurethane foam laminate and a method for manufacturing the same, the method comprising the steps of: (a) generating a foam composition of a gas-liquid mixture by feeding, as raw materials for a foam composition without using water, which is a chemical foaming agent, polyol, isocyanate, a moisture absorbent, micro hollow spheres, and an additive into a mixer, followed by mechanical foaming through a foaming gas; (b) supplying the mechanically foamed gas-liquid mixture from the mixer to a discharger connected to a connection tube; (c) coating the gas-liquid mixture, which is discharged from the discharger, on a first base film to a predetermined thickness; (d) attaching a second base film on a surface of the gas-liquid mixture coated on the first base film, and hardening the resultant structure with the attached second base film in a thermal hardener, thereby generating a polyurethane foam layer; (e) releasing the second base film after the completing of the thermal hardening step, coating a coating agent on a surface of the hardened polyurethane foam layer, and then laminating a coating film using a UV hardener; and (f) collecting the polyurethane foam laminate with the laminated coating film, using a collection roll. A low-density polyurethane foam laminate having a very thin thickness, which is required by a sealing member and a buffer applied to an electronic device, can be molded by: adding, in the foaming composition, zeolite as a moisture absorbent for absorbing residual moisture and micro hollow spheres causing less aggregation between cells; performing mechanical foaming using nitrogen as a foaming gas; and then performing thermal hardening. |
