Patent ID: 7794558
Filing Date: 2010-09-14
Classification: A01G,B29C,B29K,B29L,Y02A

Abstract:
1. A method of bonding fluororesin films, comprising bonding films (A) made of a fluororesin, wherein two sheets of films (A) are disposed so that their edges overlap each other to form an overlapping portion (B), a central part (b 1 ) of the overlapping portion (B) is press-bonded under heating at a temperature within a range of from lower by 5° C. to higher by 20° C. than the melting point of the fluororesin, and then the entire area of the portion (B) is press-bonded at a temperature within a range of from lower by 30° C. to lower by more than 5° C., than the melting point, to weld the two sheets of films (A).