POLYESTER RESIN AND HEAT-RESISTANT POLYESTER PREFORM AND HEAT-RESISTANT POLYESTER CONTAINER FORMED OF POLYESTER RESIN

PROBLEM TO BE SOLVED: To provide a polyester resin excellent in molding ability in which molding defects do not occur on a neck part which is subjected to heat crystallization even when a heat-resistant container molding preform is molded at low temperature at high speed.SOLUTION: A polyester resin...

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Bibliographische Detailangaben
Hauptverfasser:	TANABE JUNKO, KAI MASAJIRO, FUJIKAWA TAKUYA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS CONVEYING HANDLING THIN OR FILAMENTARY MATERIAL MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MAKING GRANULES OR PREFORMS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED 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 STORING 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 provide a polyester resin excellent in molding ability in which molding defects do not occur on a neck part which is subjected to heat crystallization even when a heat-resistant container molding preform is molded at low temperature at high speed.SOLUTION: A polyester resin used for molding of the heat-resistant polyester container is characterized in that, an irregular shape pellet having a major axis which is 1.5 times or more to a major axis of a predetermined pellet, is less than 40 ppm. 【課題】耐熱性容器成形用プリフォームを低温且つ高速で成形した場合にも、熱結晶化された口頸部に成形不良を生じることがない、成形性に優れたポリエステル樹脂を提供する。【解決手段】耐熱性ポリエステル容器の成形に用いられるポリエステル樹脂において、所期のペレットの長径に対して１．５倍以上の長径を有する異形ペレットが４０ｐｐｍ未満の量であることを特徴とする。【選択図】なし