ROUGH-SURFACE POLYAMIDE FILM AND LAMINATED POLYAMIDE FILM
PROBLEM TO BE SOLVED: To obtain a rough-surface film having an excellent rough surface and is excellent in resistances to impact and flex fatigue by preparing a rough- surface polyamide film with a surface unevenness having a specified central surface-average roughness and max. height. SOLUTION: A f...
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Main Authors | , , , , , , , |
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Format | Patent |
Language | English |
Published |
14.12.1999
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To obtain a rough-surface film having an excellent rough surface and is excellent in resistances to impact and flex fatigue by preparing a rough- surface polyamide film with a surface unevenness having a specified central surface-average roughness and max. height. SOLUTION: A film having at least one surface having a central surface- average roughness (SRa) of 0.05 μm or higher and a max. height (SRmax) of 1.40 μm or higher is prepd. Pref., such a film is prepd. by a method wherein a polyamide is mixed with an additive (e.g. an inorg. lubricant) and then formed into a film or wherein a mixture comprising at least two polymers including a polyamide is mixed with an inorg. lubricant and then formed into a film, and pref., the film is stretched. When a film having high strengths in addition to the above surface roughness in required, a laminated polyamide film is pref. which is prepd. by laminating the rough-surface polyamide film to at least one side of a polyamide film made of an aliph. polyamide. |
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Bibliography: | Application Number: JP19980152555 |