Method and device for producing open type polymide moldings, and base material for reflective bodies in lighting equipment
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United States of America Patent
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Dec 28, 2004
Grant Date -
Oct 31, 2002
app pub date -
Sep 10, 2001
filing date -
Jan 13, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A polyimide film F is brought into an intimate contact with a molding die 3 having a concave molding surface 3a so as to tightly close the open end thereof, and the polyimide film F is bent to deform only by the pressure difference of gas while being heated in a contactless manner. Molding is conducted by applying depressurization for a space 8 on the side of the molding die 3 relative to the polyimide film F while pressurizing the space 9 on the opposite side for the pressure difference at least in the final stage of the bending deformation so as to be in intimate contact with the concave molding surface 3a.
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