PRODUCING METHOD FOR POLYESTER

PROBLEM TO BE SOLVED: To produce a polyester, in which bubbles and a fish eye are difficult to be generated in moldings and crystallization controlling properties of the moldings are good and transparency is excellent and also dirt of a mold at time of molding is difficult to be generated. SOLUTION:...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUI YOSHINAO, YOSHIDA KOJI, YAMAUCHI ITSUKI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MAKING GRANULES OR PREFORMS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To produce a polyester, in which bubbles and a fish eye are difficult to be generated in moldings and crystallization controlling properties of the moldings are good and transparency is excellent and also dirt of a mold at time of molding is difficult to be generated. SOLUTION: In the method for producing a polyester, in which the polyester obtained by melt polymerization is discharged in a strand shape from a die head, cooled and solidified and thereafter cut into a chip state, the polyester is cut into the chip state in the conditions satisfying formula (1). 0.02