To provide a thermoplastic elastomer composition capable of forming a molded product excellent in appearance and flow mark around a tear line while maintaining rigidity.SOLUTION: A thermoplastic elastomer composition contains the following component (A), and has a minimum die swell ratio in a range of 60.80/s to 6080/s of a shear rate at a test temperature of 210°C in a capillary rheometer (see JIS K7199) of 1.30 or more. Component (A): a propylene block copolymer containing 50 to 97 mass% of propylene units and 3 to 50 mass% of ethylene units.SELECTED DRAWING: None
【課題】剛性を維持しながら、ティアライン部周辺の外観性とフローマーク性に優れた成形品を可能とする熱可塑性エラストマー組成物を提供する。【解決手段】下記成分(A)を含有する熱可塑性エラストマー組成物であって、キャピラリーレオメーター(JIS K7199参照)における試験温度210℃のせん断速度60.80/s~6080/sの範囲におけるダイスウェル比の最小値が1.30以上である、熱可塑性エラストマー組成物。成分(A):プロピレン単位の含有率が50~97質量%でエチレン単位の含有率が3~50質量%のプロピレン系ブロック共重合体。【選択図】なし
THERMOPLASTIC ELASTOMER COMPOSITION, INJECTION-MOLDED PRODUCT AND AIR-BAG HOUSING COVER
熱可塑性エラストマー組成物、射出成形品及びエアバッグ収納カバー
2023-09-13
Patent
Electronic Resource
Japanese
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |
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