| 摘要 |
A method for bonding fluororesin films, a wide fluororesin film obtained by the method, and a covering material for agricultural use, made thereof, are presented. A method of bonding films (A), wherein two sheets of films (A) made of a fluororesin, are disposed so that their edges overlap each other, a central part (b1) of the overlapping portion (B) is press-bonded under heating at a temperature within a range of from lower by 5 DEG C to higher by 20 DEG 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 DEG C to lower by more than 5 DEG C, than the melting point, to weld the two sheets of films (A); a wide fluororesin film obtained by the method; and a covering material for agricultural use, made thereof. <IMAGE> |
