Patent ID: 9022461
Filing Date: 2015-05-05
Classification: B32B,B60R

Abstract:
1. A method of manufacturing a high stiffness waterproof roof panel pad for a vehicle, comprising: preparing a hard urethane foam pad; preparing a waterproof reinforcing layer of which both surfaces are coated with PE layers; stacking the waterproof reinforcing layer on both surfaces of the urethane foam pad, laminating the PE layer in contact with the urethane foam pad and integrally forming the urethane foam pad and the waterproof reinforcing layer; and performing a cutting operation according to a shape and a size of a roof panel, wherein the urethane foam pad is formed by foaming a polyol and an isocyanate at a high pressure and a mixing ratio of 100/110 polyol to isocyanate, and reactivity of the foaming has a cream time CT of 10 seconds, a rise time RT of 64 seconds and a demolding time of 10 minutes, and a density of the urethane foam pad is 50 to 100 kg/m