POLYETHYLENE RESIN COMPOSITION, MOLDED BODY THEREOF AND CONTAINER

• Main Authors: ISHIHAMA YOSHIYUKI, FUKUDA MAKI, FUKUDA TETSURO, YASUDA KAORU, YAMAMOTO KAZUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 05.10.2017
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROBLEM TO BE SOLVED: To provide a polyethylene resin composition excellent in hollow moldability, environmental stress crack resistance and impact resistance and capable of manufacturing a molded article excellent in appearance, and provide a molded body and a container consisting of the same.SOLUTION: There is provided a polyethylene resin composition containing a specific polyethylene component (A) of 10 to 40 mass%, a specific polyethylene component (B) of 10 to 80 mass% and a specific polyethylene component (C) of 10 to 80 mass% and satisfying properties (1) to (5). Property (1):MFR is 0.1 to 1 g/10 min. Property (2):HLMFR is 10 to 50 g/10 min. Property (3):HLMFR/MFR is 40 to 140. Property (4):density is 0.940 to 0.965 g/cm. Property (5):an inflection point of elongation viscosity caused by strain hardening is observed in a double logarithmic plot of elongation viscosity η(t) (unit:Pa sec.) and elongation time t (unit:sec.) measured at temperature of 170°C and elongation strain rate of 0.1 (unit:1/sec.).SELECTED DRAWING: None 【課題】中空成形性、耐環境応力亀裂性、耐衝撃性に優れ、外観に優れた成形品を製造することができるポリエチレン樹脂組成物、並びに、それよりなる成形体及び容器。【解決手段】特定のポリエチレン成分（Ａ）を１０〜４０質量％、特定のポリエチレン成分（Ｂ）を１０〜８０質量％、特定のポリエチレン成分（Ｃ）を１０〜８０質量％含有し、特性（１）〜（５）を満足するポリエチレン樹脂組成物。特性（１）：ＭＦＲが０．１〜１ｇ／１０分である。特性（２）：ＨＬＭＦＲが１０〜５０ｇ／１０分である。特性（３）：ＨＬＭＦＲ／ＭＦＲが４０〜１４０である。特性（４）：密度が０．９４０〜０．９６５ｇ／ｃｍ３である。特性（５）：温度１７０℃、伸長歪速度０．１（単位：１／秒）で測定される伸長粘度η（ｔ）（単位：Ｐａ・秒）と伸長時間ｔ（単位：秒）の両対数プロットにおいて、歪硬化に起因する伸長粘度の変曲点が観測される。【選択図】なし