公开(公告)号：EP0938520A1

公开(公告)日：1999-09-01

申请号：EP97951431.0

申请日：1997-11-13

申请人： THE DOW CHEMICAL COMPANY

发明人： BOSIERS, Luc ,  DEGROOT, Jacquelyn, A. ,  KALE, Lawrence, T. ,  CHUM, Pak-Wing, Steve ,  DEKUNDER, Staci, A. ,  VAN DUN, Jozef, J. ,  OSWALD, Thomas, T.

IPC分类号： C08L23 ,  B32B27 ,  C08J5 ,  C09J123

CPC分类号： B32B27/08 ,  B32B15/08 ,  B32B15/085 ,  B32B15/20 ,  B32B27/304 ,  B32B27/32 ,  B32B27/34 ,  B32B27/36 ,  B32B2307/518 ,  B32B2307/736 ,  B32B2323/04 ,  B32B2323/10 ,  B32B2439/70 ,  C08J5/18 ,  C08J2323/08 ,  C08L23/0815 ,  C08L2205/02 ,  C08L2314/02 ,  C08L2666/06 ,  C09J123/0815

摘要： This invention pertains to a sealant film composition comprising at least two ethylene polymer component materials. One aspect of the invention relates to a multilayer structure having balanced sealant properties and comprising a sealant layer and a polypropylene layer, wherein the sealant layer comprises and is made from a polymer composition having particular molecular weight characteristics and a second ethylene polymer. A preferred embodiment of the present invention pertains to a medium density polyolefinic film and composition characterized by an excellent balance of a low seal initiation temperature and improved film modulus. The film and composition is comprised of and made from at least one lower density homogeneously branched ethylene polymer and at least one higher density heterogeneously or homogeneously branched ethylene polymer. The invention is particularly useful in those applications requiring fast seal times and good packaging dimensional stability such as, for example, cook-in packaging, hot-fill packaging, flowable material pouches, compression fill packaging, shrink film packaging and barrier shrink film packaging as well as biaxially oriented polypropylene (BOPP) film structures.

公开(公告)号：EP1254191A2

公开(公告)日：2002-11-06

申请号：EP00982346.9

申请日：2000-12-01

申请人： THE DOW CHEMICAL COMPANY

发明人： CHAUDHARY, Bharat, I. ,  HO, Thoi, H. ,  OSWALD, Thomas, T. ,  DELLAMEA, Jennifer

IPC分类号： C08J9/04 ,  C08L23/04 ,  C08L23/10 ,  C08K5/43 ,  C08F8/34

CPC分类号： C08J9/14 ,  C08J2323/16 ,  C08K5/43 ,  C08L23/04 ,  C08L23/06 ,  C08L23/08 ,  C08L23/0815 ,  C08L23/0838 ,  C08L23/10 ,  C08L2023/44 ,  C08L2203/14 ,  C08L2205/02 ,  C08L2205/025 ,  C08L2314/06 ,  C08L2666/04 ,  C08L2666/06

摘要： This invention describes grafted blend compositions, processes for their preparation and fabricated articles, especially foams therefrom. The blends exhibit enhanced melt strength, melt elongation greater than or equal to about 20 mm/s, increased upper service temperature, increased modulus, and increased hardness. The grafted blend compositions have little or no high shear viscosity increase over a corresponding polymer of the same chemical composition absent the coupling agent.