MANUFACTURE OF MULTILAYER PIPE FOR FORMING ORIENTATION MOLDING

PURPOSE:To obtain a multilayer pipe which has excellent transparency by cooling the exterior of the pipe with water, passing inert gas or inert gas containing water spray through the pipe, and preventing the interior of the pipe from cooling and oxidizing. CONSTITUTION:A multiplayer pipe 21 is compo...

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Bibliographische Detailangaben
Hauptverfasser:	SAKANO KOUZABUROU, OOKUBO YOSHIMICHI, NOHARA SHIGEZOU, MATSUO JIYUNICHI, SUGIMOTO TAKESHI
Format:	Patent
Sprache:	eng
Schlagworte:	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 MAKING GRANULES OR PREFORMS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS 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
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a multilayer pipe which has excellent transparency by cooling the exterior of the pipe with water, passing inert gas or inert gas containing water spray through the pipe, and preventing the interior of the pipe from cooling and oxidizing. CONSTITUTION:A multiplayer pipe 21 is composed of inner and outer polyester layers 22, 25, an intermediate gas barrier layer 24 of ethylene-vinyl alcohol copolymer, and adhesive layers 23a, 23b interposed therebetween. The pipe is manufactured by coextrusion, but the extruded pipe is quenched by dipping, and inert gas is passed through the pipe, thereby preventing the interior of the pipe from cooling and oxidizing. The thus obtained multilayer oriented polyester bottle has transparency and gas breaking withstand property equivalent to those of a glass bottle and still provides an ideal vessel having a light weight and damage resistance.