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1. 发明授权

US06645609B2 Peelable, sealable polyolefinic multilayered film and its use as a packaging film 失效
公开(公告)号：US06645609B2
公开(公告)日：2003-11-11
申请号：US09881227
申请日：2001-06-13
申请人： Bernd Sperlich , Helmut Wagner , Willi Schwarz , Hans Wunderlich
发明人： Bernd Sperlich , Helmut Wagner , Willi Schwarz , Hans Wunderlich
IPC分类号： B32B702
CPC分类号： C08L23/04 , B29C55/023 , B29K2023/00 , B29K2023/0641 , B29K2023/083 , B29K2031/04 , B32B27/30 , B32B27/32 , C08L23/08 , C08L23/0853 , Y10S428/91 , Y10T428/24967 , Y10T428/24975 , Y10T428/265 , Y10T428/31913 , Y10T428/31928 , Y10T428/31935 , C08L2666/04
摘要： Described is a stretched multilayered film comprising: (a) a polyolefin layer; and (b) at least one peelable outer layer. Each peelable outer layer (b) independently is 0.5 to 5 &mgr;m thick, comprises a copolymer of vinyl acetate and ethylene, and has a vinyl acetate proportion of from 3 to 30 wt. %, based on the weight of the peelable outer layer (b). Also described is a method of using the multilayered film as a packaging film.

2. 发明授权

US06749948B2 Polyolefin film with peelable outer layer 失效
标题翻译：具有可剥离外层的聚烯烃膜
公开(公告)号：US06749948B2
公开(公告)日：2004-06-15
申请号：US10145296
申请日：2002-05-14
申请人： Bernd Sperlich , Hans Wunderlich , Helmut Wagner , Willi Schwarz
发明人： Bernd Sperlich , Hans Wunderlich , Helmut Wagner , Willi Schwarz
IPC分类号： B32B2732
CPC分类号： B32B27/32 , B32B27/08 , B32B37/153 , B32B38/0008 , B32B2038/0028 , B32B2307/412 , B32B2307/514 , B32B2310/14 , B32B2323/04 , B32B2323/043 , B32B2323/046 , B32B2553/00 , Y10S428/91 , Y10T428/31909 , Y10T428/31913 , Y10T428/31928
摘要： A peelable, biaxially oriented, transparent multilayer polyolefin film having at least three layers is described. The peelable, biaxially oriented, transparent multilayer polyolefin film, comprises: (a) a transparent polyolefin base layer; (b) at least one peelable outer layer comprising one of, (i) a polymer selected from at least one of LLDPE, LDPE, MDPE, ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer and HDPE, and (ii) a combination of at least one propylene co- or terpolymer and at least one ethylenic polymer; and (c) at least one intermediate layer comprising a propylene co- or terpolymer. The intermediate layer (c) of the multilayer film is interposed between the base layer (a) and the peelable layer (b). Also described is a method of preparing the multilayer film, which results in the base layer and intermediate layer(s) being biaxially stretched, and the peelable layer(s) being monoaxially stretched. The multilayer films of the present invention have utility as packaging films.
摘要翻译：描述了具有至少三层的可剥离的双轴取向的多层聚烯烃膜。可剥离的双轴取向透明多层聚烯烃膜包括：（a）透明聚烯烃基层; （b）至少一个可剥离外层，其包含以下物质之一：（i）选自LLDPE，LDPE，MDPE，乙烯 - 乙酸乙烯酯共聚物，乙烯 - 丙烯酸甲酯共聚物和HDPE中的至少一种的聚合物，和（ii）的至少一种丙烯共聚物或三元共聚物和至少一种烯属聚合物; 和（c）至少一个包含丙烯共聚物或三元共聚物的中间层。多层膜的中间层（c）插入在基底层（a）和可剥离层（b）之间。还描述了制备多层膜的方法，其导致基层和中间层被双轴拉伸，并且可剥离层被单轴拉伸。本发明的多层膜可用作包装薄膜。

3. 发明授权

US06489038B1 Heat-laminable multi-layer film 失效
标题翻译：热层压多层膜
公开(公告)号：US06489038B1
公开(公告)日：2002-12-03
申请号：US09633356
申请日：2000-08-04
申请人： Bernd Sperlich , Willi Schwarz
发明人： Bernd Sperlich , Willi Schwarz
IPC分类号： B32B2728
CPC分类号： B32B27/08 , B32B5/022 , B32B5/024 , B32B21/08 , B32B27/10 , B32B27/12 , B32B27/18 , B32B27/306 , B32B27/32 , B32B2307/516 , B32B2323/04 , B32B2323/10 , C08L23/08 , C08L23/0853 , C08L2205/02 , C08L2205/025 , Y10T428/31913 , Y10T428/31928 , C08L2666/04
摘要： A multi-layered film that may be heat laminated to a substrate is described. The multi-layered film comprises a base layer comprising polypropylene, a first external layer comprising polypropylene, and a second external layer. The base layer is interposed between the first and second external layers. The second external layer comprises a mixture of first (i) and second (ii) ethylene vinyl acetate (EVA) copolymers, each having different vinyl acetate residue contents. The content of vinyl acetate residues in the first EVA copolymer (i) is 10 to 30 percent by weight, based on the weight of the first copolymer (i), the content of vinyl acetate residues in the second EVA copolymer (ii) is 1 to 10 percent by weight, based on the weight of the second copolymer (ii). The multi-layered film is heat laminated and oriented at least monoaxially.
摘要翻译：描述可以热层压到基底上的多层膜。所述多层膜包括由聚丙烯构成的基层，包含聚丙烯的第一外层和第二外层。基层介于第一和第二外层之间。第二外层包含第一（i）和第二（ii）乙烯 - 乙酸乙烯酯（EVA）共聚物的混合物，它们各自具有不同的乙酸乙烯酯残余物含量。基于第一共聚物（i）的重量，第一EVA共聚物（i）中的乙酸乙烯酯残基的含量为10〜30重量％，第二EVA共聚物（ii）中的乙酸乙烯酯残基的含量为1 至10重量％，基于第二共聚物（ii）的重量。多层膜被热层压并至少单向取向。

4. 发明授权

US06270882B1 Flexible, multi-layer film having elevated stiffness, dimensional stability and flex crack resistance 失效
标题翻译：具有刚度提高，尺寸稳定性和抗挠曲裂纹性的柔性多层膜
公开(公告)号：US06270882B1
公开(公告)日：2001-08-07
申请号：US09203831
申请日：1998-12-01
申请人： Holger Eggers , Klaus Lund , Rainer Brandt , Bernd Sperlich
发明人： Holger Eggers , Klaus Lund , Rainer Brandt , Bernd Sperlich
IPC分类号： B32B702
CPC分类号： B32B27/08 , Y10T428/2495 , Y10T428/31743 , Y10T428/31746 , Y10T428/3175 , Y10T428/31757
摘要： The present invention relates to a heat sealable, unoriented multi-layer film consisting of a sequence of layers (I) comprising one or more plies on the outer side of the film, a sequence of layers (II) also comprising at least one ply, denoted the heat sealable layer, on the other outer side of the film, optionally together with a coupling sequence of layers (III), also of one or more plies, between the sequences of layers (I) and (II), wherein the multi-layer film is characterized in that the sequence of layers (I) contains at least one layer (i) of a linear alternating copolymer (1) of carbon monoxide and at least one ethylenically unsaturated olefin, optionally together with one or more layers (ii) containing polyamide, characterised in that the ratio between the thicknesses of the sequence of layers (I) and the total multi-layer film is no greater than 0.6 and no less than 0.15, that the total thickness of the multi-layer film is no less than 50 and no more than 300 &mgr;m, and that at least one melting point, determined using the DSC method to ASTM 3418, of one of the polymeric components present in the sequence of layers (II) is at least 50° C. lower than at least one melting point, determined using the DSC method to ASTM 3418, of one of the polymers present in the sequence of layers (I).
摘要翻译：本发明涉及一种可热封的，未取向的多层膜，其由在膜的外侧上包括一个或多个层的层序列（I）组成，层序列（II）还包括至少一层，表示可热封层，在膜的另一个外侧，任选地与层（I）和（II）的序列之间的层（III）的层叠（III）也是一层或多层，其中多层其特征在于，层（I）的顺序包含至少一层线性交替共聚物（1）的一氧化碳和至少一种烯键式不饱和烯烃的层（i），任选地与一个或多个层（ii ），其特征在于，层（I）和多层膜的层序的厚度之比不大于0.6且不小于0.15，多层膜的总厚度不为小于50，不超过300个妈妈使用层析（II）序列中存在的聚合物组分之一的ASTM 3418的DSC法测定的至少一个熔点比使用DSC法测定的至少一个熔点低至少50℃ 按照ASTM 3418，存在于层（I）序列中的聚合物之一。

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