| 摘要 |
PROBLEM TO BE SOLVED: To obtain a heat resistant resin belt for sufficiently performing excellent various characteristics of a polyimide film by connecting a thermoplastic film having a specific glass transition temperature to form it into a tubular state, and substantially flattening a surface of the connecting part. SOLUTION: The heat resistant resin belt is formed in a tubular state by connecting a thermoplastic film 12 having a glass transition temperature of 150 deg.C or higher or more preferably 230 deg.C or higher, and substantially flatly forming a surface of its connecting part 14. In the case of connecting the part 14 of the belt, if the film 12 is formed of one film, the part 14 of the film 12 is formed so as to be substantially flat at the time of superposing and connecting both the connected parts. That is, connecting ends 16 of the film 12 are formed in a stepped shape of a point symmetry, both the connected parts 16 are superposed, heated to a glass transition temperature or higher, and heat fusion bonded to obtain it. |
