公开(公告)号：EP3050695A4

公开(公告)日：2017-08-09

申请号：EP15842677

申请日：2015-02-26

申请人： SEKISUI SEIKEI LTD

发明人： TADOKORO ATSUHITO ,  TOKUDOME SHINICHI ,  HISHIDA TOMOYUKI

IPC分类号： B29C55/06 ,  B29C55/18 ,  B29K23/00 ,  B29L7/00 ,  C08L23/06

CPC分类号： C08L23/06 ,  B29C55/06 ,  B29C55/18 ,  B29K2023/065 ,  B29L2007/002

摘要： The present invention provides a single-layer shape retaining material excellent in mechanical strengths, such as tensile elastic modulus and tensile strength, as well as in non-directional shape retaining properties; and a method for producing the same. The shape retaining material is a fibrous, band-like, or sheet-like stretched formed material comprising 100 parts by weight of a high-density polyethylene resin having a weight-average molecular weight of 100,000 to 500,000 and a density of 0.945 to 0.960 g/cm 3 and 3 to 50 parts by weight of an ethylene-±-olefin copolymer obtained by copolymerizing ethylene with an ±-olefin having 4 to 10 carbon atoms, the copolymer having a density of 0.935 to 0.960 g/cm 3 , the difference in density between the copolymer and the high-density polyethylene resin being ± 0.020 g/cm 3 or less, wherein the material shows, after being bent at an angle of 180 degrees in a direction orthogonal to the stretching direction, held in the bent state for 1 minute, released, and left for 5 minutes after the release, a return angle of 15 degrees or less; and shows, after being bent in a direction parallel to the stretching direction, a return angle of 25 degrees or less.

摘要翻译： 本发明提供拉伸弹性模量，拉伸强度等机械强度以及无指向性的形状保持性优异的单层形状保持材料， 及其制造方法。 形状保持材料是纤维状，带状或片状拉伸成形材料，其包含100重量份的重均分子量为100,000至500,000且密度为0.945至0.960g的高密度聚乙烯树脂 / cm 3和3至50重量份的乙烯 - 乙烯共聚物，所述乙烯 - 乙烯共聚物通过将乙烯与具有4至10个碳原子的α-烯烃共聚而获得，所述共聚物具有0.935至0.960g / cm 3的密度，所述差异 在共聚物和高密度聚乙烯树脂之间的密度为±0.020g / cm 3或更小时，其中该材料在与拉伸方向正交的方向上以180°的角度弯曲后保持处于弯曲状态 释放1分钟，释放后放置5分钟，返回角度为15度或更小; 并示出在与拉伸方向平行的方向上弯曲后的返回角度为25度以下。