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公开(公告)号:US3879492A
公开(公告)日:1975-04-22
申请号:US25311372
申请日:1972-05-15
Applicant: UCB SA
Inventor: BONTINICK WALTER
IPC: C08L23/02 , C08L57/00 , C08L77/00 , C09J123/02 , C08G41/04
CPC classification number: B32B27/08 , B32B27/32 , B32B27/34 , B32B2307/748 , B32B2323/10 , B32B2377/00 , B32B2439/70 , C08L23/02 , C08L23/06 , C08L23/0853 , C08L23/0869 , C08L23/10 , C08L23/18 , C08L23/20 , C08L23/22 , C08L25/10 , C08L27/06 , C08L53/02 , C08L57/00 , C08L77/00 , C08L2203/162 , C08L2205/02 , C08L2205/035 , C08L2207/062 , C08L2207/066 , C08L2666/02 , C09J123/02 , C08L2666/20 , C08L2666/06 , C08L2666/04
Abstract: Wrapping films capable of forming peelable seals, comprising by weight 20 to 80% of heat-sealable rigid polymers (A) which, in film form, have an elasticity modulus in excess of 3000 kg/cm2, measured according to the ASTM D 88227 standards; 0.1 to 50% of non-heat-sealable polymers (B) which do not form a solution with polymer (A); 0.1 to 30% of heat-sealable branched olefinic polymers (C) which, in film form, have an elasticity modulus below 3000 kg/cm2, measured according to the ASTM D 88227 standard; and 0 to 45% of polymers (D) compatible with polymers (A), (B) and (C), the sum of the polymers (A), (B), (C) and (D) representing 100% of the polymer material of the film, to which up to 45% of additives (E) and/or up to 10% of adjuvants (F) conventional for wrapping films may be added and process for the preparation thereof.
Abstract translation: 能够形成可剥离密封件的包装薄膜包含按重量计20-80%的可热封刚性聚合物(A),其以膜形式具有超过3000kg / cm 2的弹性模量,根据ASTM D 88227标准 ; 0.1〜50%不能与聚合物(A)形成溶液的不可热封聚合物(B); 根据ASTM D 88227标准测量,其膜形式的弹性模量低于3000kg / cm 2的可热封支链烯烃聚合物(C)为0.1至30% 和与聚合物(A),(B)和(C)相容的聚合物(D)的0至45%,聚合物(A),(B),(C)和(D) 聚合物材料可以加入其中常规用于包装薄膜的多达45%的添加剂(E)和/或至多10%的佐剂(F)和其制备方法。