公开(公告)号：EP1272695A1

公开(公告)日：2003-01-08

申请号：EP01924366.6

申请日：2001-03-27

申请人： DOW GLOBAL TECHNOLOGIES INC.

发明人： MAUGANS, Rexford, A. ,  SEHANOBISH, Kalyan ,  ROWLAND, Michael, E. ,  HERRING, Ray, A. ,  KAARTO, John ,  SPRINGS, Kenneth, E. ,  HO, Thoi, H.

IPC分类号： D01F6/46 ,  B32B5/04 ,  D04H1/54 ,  D04H3/14

CPC分类号： B32B27/12 ,  B32B5/04 ,  B32B2038/0028 ,  B32B2262/0253 ,  D01F6/46 ,  Y10T428/256 ,  Y10T428/2967 ,  Y10T428/31

摘要： This invention relates to a method of making a film-fabric composite (including a film-fabric laminate) wherein the fabric is characterized as having improved tensile elongation (without rupture). In particular, the invention pertains to a method of making a film-fabric laminate having structural elastic-like behavior wherein the fabric is a nonwoven thermally bonded fabric characterized as having improved high strain rate tensile elongation and comprises a plurality of fibers comprised of at least one polypropylene polymer and at least one ethylene polymer, wherein the method comprises stretching the laminate at a high strain rate. The improved fabric is characterized by higher high strain rate tensile properties and a broader bond window which is also shifted to substantially lower temperatures with regard to maximum tensile properties. The improved fabric enables higher stretching levels or speeds on stretching apparati often employed to impart elasticity or elastic-like behavior to inelastic polymeric materials. Polypropylene copolymers as well as polypropylene homopolymers may be used in the invention which is useful for durable and disposable articles such as diapers, bandages, pantiliners, continence pads, and sanitary napkins.

公开(公告)号：EP1290049A1

公开(公告)日：2003-03-12

申请号：EP01937723.3

申请日：2001-05-24

申请人： DOW GLOBAL TECHNOLOGIES INC.

发明人： GOETHEL, Gabriele ,  ROWLAND, Michael, E. ,  BETSO, Steve, R. ,  GUEST, Martin, J. ,  KATZER, Karin ,  WEVERS, Ronald ,  ALLGEUER, Thomas, T. ,  REDDY, Hari, P.

IPC分类号： C08F255/02 ,  C08F8/46 ,  C08L51/06 ,  D01F6/46 ,  D01F8/06 ,  C08F279/02

摘要： A graft polymer according to the invention contains a backbone of one or more substantially random interpolymers, comprising: (1) polymer units derived from: (a) at least one vinyl or vinylidene aromatic monomer, or (b) at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, or (c) a combination of at least one aromatic vinyl or vinylidene monomer and at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, and (2) polymer units derived from at least one of ethylene and/or a C3-20 α-olefin; and (3) optionally polymer units derived from one or more of ethylenically unsaturated polymerizable monomers other than those derived from (1) and (2); said backbone being grafted with one or more olefinically unsaturated organic monomer(s). In a preferred embodiment such graft polymers were prepared using a reactive extrusion process.