Method for manufacturing foam pads

Details Method for manufacturing foam pads Method for manufacturing foam pads

2005-09-23

2008-12-02

Yao, Sam Chuan (Department: 4111)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

C264S041000, C264S048000, C264S051000

Reexamination Certificate

active

07459109

ABSTRACT:
A method for manufacturing foam pads includes a first step of preparing a proper amount of PVC power, DOP curing agent, light calcium carbonate, kaolin, foaming agent and pigment and pouring them into a blending device to be blended and form a liquid starchy material. Next, the liquid starchy material is conveyed into an intermediate material barrel and kept stationary for pre-foaming at normal temperature for about 8 hours and then coated on a conveyer pelt to form a starchy material layer. Subsequently, the starchy material layer is kept stationary and heated at 80-90° C. for about 3-10 minutes and then continuously heated at 185-200° C. for about 20-30 minutes to form an integral-sheeted foam pad. After cooled, the integral-sheeted foam pad is thermo-compressed and cut into various foam pad products.

REFERENCES:
patent: 4158538 (1979-06-01), Kleiner et al.
patent: 4381962 (1983-05-01), Sato et al.
patent: 4415514 (1983-11-01), Dorrestijn et al.
patent: 5087395 (1992-02-01), Hitchcock

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