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  • 专利标题:   Propylene polymer based composite film useful in packaging material has different layers comprising propylene polymer and propylene impact copolymer, propylene impact copolymer having elastic part forms dispersed strip-shaped rubber phase.
  • 专利号:   WO2022083659-A1, CN114434914-A, CN114434913-A, CN114434914-B, CN114434913-B, KR2023090352-A, BR112023007325-A2, CN116261518-A
  • 发明人:   XU M, ZHANG S, GAO D, BAI Y, XU K, REN Y, LIU J, QUAN H, DONG M, ZHANG Q, CHOU B, LYU Y, SHAO J, LV Y, RUNWAY, BAIGER C, LIU Y
  • 专利权人:   CHINA PETROLEUM CHEM CORP, BEIJING RES INST CHEM IND CHINA PETRO, SINOPEC BEIJING RES INST CHEM IND, CHINA PETROLEUM CHEM CORP, BEIJING RES INST CHEM IND CHINA PETRO
  • 国际专利分类:   B29C048/00, B29C048/08, B32B027/06, B32B027/18, B32B027/20, B32B027/32, B32B033/00, B65D065/40, C08J005/18, C08L023/08, C08L023/12, C08L053/02
  • 专利详细信息:   WO2022083659-A1 28 Apr 2022 B32B-027/32 202245 Pages: 102 Chinese
  • 申请详细信息:   WO2022083659-A1 WOCN125096 20 Oct 2021
  • 优先权号:   CN11125599, CN11126164, CN80064273, BR11007325, KR717082

▎ 摘　　要

NOVELTY - Propylene polymer based composite film comprises two different layers including layer a and layer b; where the layer a and the layer b both comprise at least one propylene polymer and at least one layer of layer a and layer b comprises a propylene impact copolymer. The propylene impact copolymer comprises an elastic part, the elastic part forms dispersed strip-shaped rubber phase in the composite film. The rubber phase is arranged in parallel with each other, and the average size of the cross shaft of the rubber phase is 20-200 nm and the average value of the aspect ratio is 5-20. The cross section measurement of the composite film cut along the transverse direction (TD) is observed through the atomic force microscope. USE - The composite film is useful in the field of packaging material, e.g. battery packaging material, electronic product packaging material or food packaging material (claimed). ADVANTAGE - The composite film has both excellent impact resistance and optical properties, and even has good tensile properties and/or good heat-sealing strength at lower heat-sealing temperatures, and even has good uniformity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the composite film comprising extruding the raw material composition for forming each layer, and casting to form the composite film after optional granulation process, where before the extrusion process, the elastic part of the propylene impact copolymer used in the raw material composition forms a granular rubber phase, the average particle diameter of the rubber phase is greater than or equal to 1.8 mu m, preferably greater than or equal to 1.5 mu m, and the maximum particle diameter is not greater than 2.5 mu m, preferably not greater than 2 mu m, and observing the impact sample strip section measuring by scanning electron microscope; and (2) a packaging material, comprising the composite film, where the packaging material is battery packaging material, electronic product packaging material or food packaging material and which are containing aluminum-plastic composite film.