MOLDING COVER RESIN PELLET AND MANUFACTURE THEREOF

MOLDING COVER RESIN PELLET AND MANUFACTURE THEREOF

PURPOSE:To obtain the titled pellet which protects a thermoplastic resin from troubles due to moisture absorption with a specified shape of a cut surface by extruding the humidity sensitive thermoplastic resin (composition) as core with an olefin based resin as sheath. CONSTITUTION:A humidity sensit...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SAKANO KOUZABUROU, TAKEDA ISAMU, YAZAKI JINICHI
Format: Patent
Sprache:eng
Schlagworte:
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS
MAKING GRANULES OR PREFORMS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED
RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS
THEIR RELEVANT APPARATUS
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:PURPOSE:To obtain the titled pellet which protects a thermoplastic resin from troubles due to moisture absorption with a specified shape of a cut surface by extruding the humidity sensitive thermoplastic resin (composition) as core with an olefin based resin as sheath. CONSTITUTION:A humidity sensitive thermoplastic resin (composition) such as olefin-vinyl alcohol copolymer and an olefin based resin are melted and kneaded in separate extruders and then, fed to a die head 7. As a result, the mixture is extruded from an orifice 10 as a strand 13 having the humidity sensitive resin as core with the olefin based resin as sheath. Then, the strand 13 is cooled in a cooling tank 15 to solidify the surface of the strand. While softened inside, the strand is pressed at a small interval. Further more, the strand is cut with a rotary cutter 17 or the like at pressed parts to obtain the intended pellet 1.