PURPOSE: To firmly adhere together two polyolefin foaming objects, by heating by high frequency induction in such a condition as disperses metallic conductive elements over an adhering surface of one of the two polyolefin foaming objects.
CONSTITUTION: Metallic conductive elements, such as metal powder, metal mesh, etc., are temporarily adhered to an adhering surface of one of two polyolefin foaming objects having a high foaming power of an apparent specific gravity of about 0.2W 0.4, an adhering surface of the other being laid on a top of aforesaid adhering surface. These foaming objects are then pressurized at a pressure of about 2W5kg/ cm2, the objects being induction-heated by impressing a high frequency of 10W 500kHz. As a result of conductive elements, thus, being heated, the foaming objects are welded together. The foaming objects are then left for a period of from 20W30 seconds for cooling.
YAMAMOTO TADAO
SHINGUU JIYUNICHI
SHIKINA MORIMASA
MAKIGUCHI HIROSHI
| JPS4734768A | ||||
| JPS4881972A | 1973-11-01 |