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：US20140205823A1

公开(公告)日：2014-07-24

申请号：US14240776

申请日：2011-08-26

申请人： Xiao Bing Yun ,  Rangjuan Cong ,  Jephrey Pan ,  Teresa P. Karjala

发明人： Xiao Bing Yun ,  Rangjuan Cong ,  Jephrey Pan ,  Teresa P. Karjala

IPC分类号： C08J5/18 ,  B32B27/32 ,  B32B7/02 ,  B29C47/00

CPC分类号： B29C55/005 ,  B29C48/0018 ,  B29C55/143 ,  B29K2023/0625 ,  B32B7/02 ,  B32B15/08 ,  B32B15/20 ,  B32B27/08 ,  B32B27/10 ,  B32B27/16 ,  B32B27/32 ,  B32B27/34 ,  B32B27/36 ,  B32B2307/518 ,  B32B2307/54 ,  B32B2307/736 ,  B32B2439/00 ,  B32B2553/00 ,  C08J5/18 ,  C08J2323/08 ,  C08L23/0815 ,  C08L23/10 ,  Y10T428/24992 ,  Y10T428/31913

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.

摘要翻译： 本发明公开了一种形成双轴取向膜的方法。 该方法包括首先选择一种聚烯烃树脂，其中所述聚烯烃树脂包含直链低密度聚乙烯树脂，其特征在于在CEF下在大于97.0℃的温度下从线性低密度聚乙烯树脂的总重量的9至35重量％ 。 其特征还在于具有33至80的CDR和0.15至0.45的Mw比。 接下来，由在第一步骤中选择的聚烯烃树脂形成膜。 最后，在第二步骤中形成的膜以顺序的方式取向。 通过该方法生产的膜的特征在于，与CD相比，在MD中具有至少1.5倍的极限伸长率，并且与MD相比，CD中的2％割线模量是CD的至少1.25倍。 膜的进一步特征在于当在90℃的温度下暴露10分钟时，在MD中具有小于10％的游离残余收缩率和小于10％的CD。