Patent ID: 7459109

Claim:
A method for manufacturing foam pads comprising: a first step of preparation of materials; preparing a proper amount of PVC powder, DOP curing agent, light calcium carbonate, kaolin, foaming agent and pigment; a second step of blending of said materials; said materials poured into a blending device, said materials blended together in a blending device to form a liquid starchy material; a third step of pre-foaming; said liquid starchy material conveyed into an intermediate material barrel, said liquid starchy material kept stationary in said intermediate barrel for about 8 hours for pre-foaming; a fourth step of coating; said liquid starchy material coated on a conveyer belt in an open state after pre-foaming, said liquid starchy material forming a starchy material layer with a preset thickness on said conveyer belt; a fifth step of heating; said starchy material layer kept stationary and heated by a roasting oven at the temperature of 80˜90° C. for about 3˜10 minutes; a sixth step of foaming; said starchy material layer continuously heated by another roasting oven at the temperature of 185˜200° C. for about 20˜30 minutes, said starchy material layer foaming and turning into an integral-sheeted foam pad; a seventh step of cooling; said integral-sheeted foam pad properly cooled in a preset way; an eighth step of thermo-compressing in shape; said foam pad thermo-compressed by a mold, said foam pad compressed into various shapes and formed with various surface streaks; and a ninth step of cutting; said integral-sheeted foam pad properly cut into different foam pad products according to practical needs.