ROUGH-SURFACE POLYAMIDE FILM AND LAMINATED POLYAMIDE FILM

• Main Authors: IWANISHI MASUMI, IMAI KAZUMOTO, MORISHIGE CHIKAO, OKUMURA SHINICHIRO, MIKO TSUTOMU, SUGIMOTO MASANORI, MATSUDA AKIRA, OKUDAIRA HARUO
• Format: Patent
• Language: English
• Published: 14.12.1999
• Edition: 6
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

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.