BIAXIALLY STRETCHED POLYESTER FILM
PROBLEM TO BE SOLVED: To provide a baixially stretched polyester film excellent in thickness uniformity and also excellent in rectilinearity at the time of tearing in its longitudinal direction. SOLUTION: A film is produced by using a raw material prepared by mixing polybutylene terephthalate contai...
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| creator | KISHIDA MINORU KAWAGUCHI KAZUHIRO |
| description | PROBLEM TO BE SOLVED: To provide a baixially stretched polyester film excellent in thickness uniformity and also excellent in rectilinearity at the time of tearing in its longitudinal direction. SOLUTION: A film is produced by using a raw material prepared by mixing polybutylene terephthalate containing 5-20 wt.% of a polytetramethylene glycol unit with a mol.wt. of 600-4,000 (modified PBT) and polyethylene terephthalate(PET) in a wt. ratio of PET/modified PBT=55/45-70/30 and the thickness irregularity in the lateral and longitudinal directions of the film satisfies Rt/Tt |
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SOLUTION: A film is produced by using a raw material prepared by mixing polybutylene terephthalate containing 5-20 wt.% of a polytetramethylene glycol unit with a mol.wt. of 600-4,000 (modified PBT) and polyethylene terephthalate(PET) in a wt. ratio of PET/modified PBT=55/45-70/30 and the thickness irregularity in the lateral and longitudinal directions of the film satisfies Rt/Tt<=0.075, Rm/Tm<=0.147 [wherein Rt and Rm (μm) are respectively the differences between the max. thickness and min. thickness in lateral and longitudinal difrections and Tt and Tm (μm) are respectively the average values of film thickness in lateral and longitudinal directions].</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS CONVEYING GENERAL PROCESSES OF COMPOUNDING HANDLING THIN OR FILAMENTARY MATERIAL 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 PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STORING THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP |
| title | BIAXIALLY STRETCHED POLYESTER FILM |
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