PTFE FILM, RUBBER STOPPER FOR MEDICAL USE, METHOD FOR PROCESSING PTFE FILM, AND METHOD FOR PRODUCING RUBBER STOPPER FOR MEDICAL USE

摘要

PROBLEM TO BE SOLVED: To provide: a PTFE film which hardly causes voids in drawing processing; a rubber stopper for medical use in which a laminated PTFE film has no voids; a method for processing a PTFE film which hardly causes voids in drawing processing; and a method for producing a rubber stopper for medical use.;SOLUTION: The heat of fusion of the PTFE film is 23 mJ/mg or lower, the heat of fusion being measured by JIS K7122 "Method for Measuring Heat of Transition of Plastic." The rubber stopper for medical use is formed by making the PTFE film, whose heat of fusion is 23 mJ/mg or lower, combined in one unit. The method for processing the PTFE film comprises a process in which the PTFE film is heated to its melting point or higher and a process in which the PTFE film heated to its melting point or higher is cooled at a cooling rate of at least 10°C/minute across the melting point. In the method for producing the rubber stopper for medical use, the PTFE film which is cooled at a cooing rate of at least 10°C/minute across the melting point is integrated with a rubber member, vulcanized and molded.;COPYRIGHT: (C)2013,JPO&INPIT