METHOD FOR HOT CRYSTALLIZATION OF NECK PORTION IN PREFORM OF BIAXIAL STRETCH BLOW MOLDED BOTTLE
A method for thermally crystallizing a neck (4) of a primary molded product (1) for forming a bottle-shaped container made of polyethylene terephthalate as principal ingredient, said neck (4) having a functional part (5) and a neck ring (7) at a lower end thereof, said functional part (5) being form...
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| creator | IIMURA, YOSHIHIRO HIRASAWATSU, TADAO UESUGI, DAISUKE KAWAHARA, YUKIO |
| description | A method for thermally crystallizing a neck (4) of a primary molded product (1) for forming a bottle-shaped container made of polyethylene terephthalate as principal ingredient, said neck (4) having a functional part (5) and a neck ring (7) at a lower end thereof, said functional part (5) being formed with screw threads (8) at an upper portion thereof and a bead ring (6) below the screw threads (8), said method comprising: heating the neck (4), and then squeezing the bead ring (6) heated to the heat-deformable temperature, from outside so as to form an outer diameter of the bead ring (6) within a dimensional tolerance for deformation with regard to sealing effect. Preferably, the primary molded product includes at least one resin layer(s) made of polyethylene terephthalate as principal ingredient and at least one gas barrier material layer(s), and has a multilayer structure. Also, preferably, the bead ring (6) is squeezed by 0.1mm to 0.4mm in terms of an outer diameter of the bead ring (6) immediately after a completion of heating. Also, a jig (13) for the above method is provided. |
| format | Patent |
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Preferably, the primary molded product includes at least one resin layer(s) made of polyethylene terephthalate as principal ingredient and at least one gas barrier material layer(s), and has a multilayer structure. Also, preferably, the bead ring (6) is squeezed by 0.1mm to 0.4mm in terms of an outer diameter of the bead ring (6) immediately after a completion of heating. 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Preferably, the primary molded product includes at least one resin layer(s) made of polyethylene terephthalate as principal ingredient and at least one gas barrier material layer(s), and has a multilayer structure. Also, preferably, the bead ring (6) is squeezed by 0.1mm to 0.4mm in terms of an outer diameter of the bead ring (6) immediately after a completion of heating. 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Preferably, the primary molded product includes at least one resin layer(s) made of polyethylene terephthalate as principal ingredient and at least one gas barrier material layer(s), and has a multilayer structure. Also, preferably, the bead ring (6) is squeezed by 0.1mm to 0.4mm in terms of an outer diameter of the bead ring (6) immediately after a completion of heating. Also, a jig (13) for the above method is provided.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre ; ger |
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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 HOT CRYSTALLIZATION OF NECK PORTION IN PREFORM OF BIAXIAL STRETCH BLOW MOLDED BOTTLE |
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