STRETCHED POLYAMIDE FILM

• Main Authors: ENDO, TAKURO, NAGARA, AKINOBU, SHIMIZU, TOSHIYUKI, MIYAGUCHI, YOSHINORI
• Format: Patent
• Language: English; French; Japanese
• Published: 07.09.2012
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; 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; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

Provided is a stretched polyamide film having superior ease of lamination, laminate strength, mechanical properties, and impact resistance, and, when used in various packaging materials, having an effect of preventing breakage of a product due to, and protecting contents from, vibration, impact, and the like during transportation. This stretched polyamide film has nylon 6 as a main constituent component, wherein the surface layer on at least one surface fulfills conditions (1) and (2), and the stretched polyamide film fulfills condition (3). (1) Relaxivity of surface layer orientation as obtained by infrared spectroscopy is in the range of 0.3-0.5. (2) The degree of crystallization of the surface layer as obtained by infrared spectroscopy is in the range of 1.0-1.4. (3) Heat shrinkage (%) in the TD direction after 10 minutes at 160°C is in the range of 0.6-4. L'invention concerne un film polyamide étiré présentant une grande facilité de stratification, une robustesse du stratifié, des propriétés mécaniques et une résistance aux chocs et permettant, lorsqu'il est utilisé dans des matériaux d'emballage variés, d'éviter le bris d'un produit dû aux vibrations, aux chocs et analogues et de protéger les contenus contre les vibrations, les chocs et analogues pendant le transport. Le film polyamide étiré comprend du nylon (6) comme composant constituant principal, la couche de surface sur au moins une surface remplissant les conditions (1) et (2), et le film polyamide étiré remplissant la condition (3). (1) La relaxivité d'orientation de couche de surface telle qu'elle est obtenue par spectroscopie infrarouge est comprise dans la plage entre 0,3 et 0,5. (2) Le degré de cristallisation de la couche de surface tel qu'il est obtenu par spectroscopie infrarouge est compris dans la plage entre 1,0 et 1,4. (3) Le retrait thermique (%) dans la direction TD après 10 minutes à 160°C est compris dans la plage entre 0,6 et 4.