METHOD FOR PRODUCING POLYSTYRENE RESIN SHEET
PROBLEM TO BE SOLVED: To provide a method for producing a polystyrene resin sheet which is reduced in stress nonuniformity and yellowish tone, is controlled in staining a sheet molding die, and makes a cloudproof-treated sheet molding reduced in cloudproofing nonuniformity. SOLUTION: In the method f...
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| creator | TAKAHASHI KAZUO ISOGO TATSUO GOTO YUKIMI ANDO TAKAYUKI KAWACHI KOICHI GOSHI YOSUKE SHIRAISHI TAKAHIRO WATABE HIDEKI ARAI YASUHIRO WATANABE HITOSHI |
| description | PROBLEM TO BE SOLVED: To provide a method for producing a polystyrene resin sheet which is reduced in stress nonuniformity and yellowish tone, is controlled in staining a sheet molding die, and makes a cloudproof-treated sheet molding reduced in cloudproofing nonuniformity. SOLUTION: In the method for producing the polystyrene resin sheet, a polystyrene resin having a molecular weight (MW) of 100,000-400,000 and a residual volatile component of 50-2,000 ppm is mixed with a recycled polystyrene resin, and a twin-screw extruder in which the ratio L/D of a screw length L (m) to a screw diameter D (m) is 10-70 is used. COPYRIGHT: (C)2007,JPO&INPIT |
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SOLUTION: In the method for producing the polystyrene resin sheet, a polystyrene resin having a molecular weight (MW) of 100,000-400,000 and a residual volatile component of 50-2,000 ppm is mixed with a recycled polystyrene resin, and a twin-screw extruder in which the ratio L/D of a screw length L (m) to a screw diameter D (m) is 10-70 is used. 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SOLUTION: In the method for producing the polystyrene resin sheet, a polystyrene resin having a molecular weight (MW) of 100,000-400,000 and a residual volatile component of 50-2,000 ppm is mixed with a recycled polystyrene resin, and a twin-screw extruder in which the ratio L/D of a screw length L (m) to a screw diameter D (m) is 10-70 is used. COPYRIGHT: (C)2007,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL |
| title | METHOD FOR PRODUCING POLYSTYRENE RESIN SHEET |
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