POLYESTER RESIN INJECTION MOLDING FOR MEDICAL CARE IMPLEMENT

• Main Author: YOSHIHARA NORI
• Format: Patent
• Language: English
• Published: 24.02.2005
• Edition: 7
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; HUMAN NECESSITIES; HYGIENE; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES; MEDICAL OR VETERINARY SCIENCE; METALLURGY; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL; 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; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide an injection molding for medical care implements which is reduced in an eluate, contains no endocrine disrupter, is excellent in injection moldability, transparency, hue, and impact strength, and undergoes little discolorations due to irradiation with radioactive rays or electron beams. SOLUTION: This injection molding for the medical care implements is obtained by injection-molding a composition of a copolyester containing 5 to 300 ppm (in terms of the element) of at least one member selected from a germanium element and an aluminum element and essentially consisting of a glycol component comprising 65 to 95 mol % ethylene glycol and 5 to 35 mol% neopentyl glycol and a dicarboxylic acid component comprising 65 to 100 mol% terephthalic acid and having an intrinsic viscosity of 0.50 to 0.90 dl/g, and has the following properties: (1) the haze per 4 mm thickness is 1.0 or below, (2) the amount of the eluate obtained by elution with water at 50°C for 5 hr is 3 ppm or smaller, and (3) the yellowness index (YI) is 8.0 or lower. COPYRIGHT: (C)2005,JPO&NCIPI