公开(公告)号：US10363700B2

公开(公告)日：2019-07-30

申请号：US14240776

申请日：2011-08-26

申请人： Xiao B. Yun ,  Rongjuan Cong ,  Jephrey Pan ,  Teresa P. Karjala

发明人： Xiao B. Yun ,  Rongjuan Cong ,  Jephrey Pan ,  Teresa P. Karjala

IPC分类号： B29C55/14 ,  B29C55/00 ,  B29C48/00 ,  C08J5/18 ,  C08L23/08 ,  B32B15/08 ,  B32B15/20 ,  B32B27/08 ,  B32B27/10 ,  B32B27/16 ,  B32B27/32 ,  B32B27/34 ,  B32B27/36 ,  B32B7/02 ,  B29C47/00 ,  C08L23/10 ,  B29K23/00

摘要： The present invention discloses a process for forming a biaxially oriented film. The process includes first selecting a polyolefin resin wherein said polyolefin resin comprises a linear low density polyethylene resin characterized by having from 9 to 35 weight percent of the total weight of linear low density polyethylene resin eluting from a CEF at a temperature greater than 97.0° C.; and further characterized by having a CDR of from 33 to 80 and a Mw Ratio of from 0.15 to 0.45. Next a film is formed from the polyolefin resin selected in the first step. Finally the film formed in the second step is oriented in a sequential manner. The films produced by this process are characterized by having an ultimate elongation at least 1.5 times greater in the MD as compared to the CD and the 2% secant modulus is a least 1.25 times greater in the CD as compared to the MD. The films are further characterized by having free residual shrinkage of less than 10% in the MD and less than 10% in the CD when exposed to a temperature of 90° C. for 10 minutes.

公开(公告)号：US20100260996A1

公开(公告)日：2010-10-14

申请号：US12757091

申请日：2010-04-09

申请人： Yong Chen ,  Hongyu Chen ,  Xiao B. Yun ,  Jing Li ,  Morgan M. Hughes ,  Rajen M. Patel

发明人： Yong Chen ,  Hongyu Chen ,  Xiao B. Yun ,  Jing Li ,  Morgan M. Hughes ,  Rajen M. Patel

IPC分类号： B32B5/00 ,  B32B27/32 ,  B32B27/08

CPC分类号： B32B27/32 ,  B32B7/02 ,  B32B27/327 ,  B32B2250/03 ,  B32B2250/04 ,  B32B2250/05 ,  B32B2250/242 ,  B32B2307/31 ,  B32B2307/518 ,  B32B2439/70 ,  B32B2553/00 ,  Y10T428/24942 ,  Y10T428/265 ,  Y10T428/266 ,  Y10T428/2817 ,  Y10T428/31917 ,  Y10T428/31924 ,  Y10T428/31938

摘要： A multilayer biaxially oriented polypropylene film is disclosed which comprises at least three layers. The first layer is an outer layer comprising a first polymer which is a homopolymer polypropylene resin having a melting point of at least 155° C. The second layer is a core layer, having a melting point greater than 150° C. The core layer includes a blend comprising a second polymer which is a polypropylene homopolymer having a melting point of at least 155° C. and a third polymer having a melting point no greater than 145° C. The second polymer comprises from 20% to 80% by weight of the core layer while the third polymer comprises from 80% to 20% by weight of the core layer. The last required layer in the film is a sealant layer. The sealant layer comprises a fourth polymer having a melting point no greater than 145° C.

摘要翻译： 公开了一种包括至少三层的多层双轴取向聚丙烯薄膜。 第一层是包含第一聚合物的外层，第一聚合物是熔点至少为155℃的均聚聚丙烯树脂。第二层是熔点大于150℃的芯层。芯层包括 共混物，其包含第二聚合物，其是熔点为至少155℃的聚丙烯均聚物和熔点不大于145℃的第三聚合物。第二聚合物包含20重量％至80重量％ 核心层，而第三聚合物占芯层重量的80％至20％。 膜中最后需要的层是密封剂层。 密封层包括熔点不大于145℃的第四聚合物