公开(公告)号：US06773810B2

公开(公告)日：2004-08-10

申请号：US10195279

申请日：2002-07-15

Applicant: Ashish Sen ,  John Klier ,  Rexford A. Maugans ,  Kenneth Stewart, Jr.

Inventor： Ashish Sen ,  John Klier ,  Rexford A. Maugans ,  Kenneth Stewart, Jr.

IPC: D01F800

CPC classification number: D04H1/54 ,  D01F6/46 ,  D01F8/06 ,  D04H1/4209 ,  D04H1/425 ,  D04H1/4258 ,  D04H1/4266 ,  D04H1/4291 ,  D04H1/4382 ,  D21H13/14 ,  D21H13/20 ,  D21H15/10 ,  Y10T428/29 ,  Y10T428/2909 ,  Y10T428/2924 ,  Y10T428/2929 ,  Y10T428/2931 ,  Y10T428/2967

Abstract: The elasticity of elastic, absorbent structures, e.g., diapers, is improved without a significant compromise of the absorbency of the structure by the use of bicomponent and/or biconstituent elastic fibers. The absorbent structures typically comprise a staple fiber, e.g., cellulose fibers, and a bicomponent and/or a biconstituent elastic. The bicomponent fiber typically has a core/sheath construction. The core comprises an elastic thermoplastic elastomer, preferably a TPU, and the sheath comprises a homogeneously branched polyolefin, preferably a homogeneously branched substantially linear ethylene polymer. In various embodiments of the invention, the elasticity is improved by preparation techniques that enhance the ratio of elastic fiber:cellulose fiber bonding versus cellulose fiber:cellulose fiber bonding. These techniques include wet and dry high intensity agitation of the elastic fibers prior to mixing with the cellulose fibers, deactivation of the hydrogen bonding between cellulose fibers, and grafting the elastic fiber with a polar group containing compound, e.g. maleic anhydride.

公开(公告)号：US06811871B2

公开(公告)日：2004-11-02

申请号：US10799168

申请日：2004-03-12

Applicant: Ashish Sen ,  John Klier ,  Rexford A. Maugans ,  Kenneth Stewart, Jr.

Inventor： Ashish Sen ,  John Klier ,  Rexford A. Maugans ,  Kenneth Stewart, Jr.

IPC: D01F600

CPC classification number: D04H1/54 ,  D01F6/46 ,  D01F8/06 ,  D04H1/4209 ,  D04H1/425 ,  D04H1/4258 ,  D04H1/4266 ,  D04H1/4291 ,  D04H1/4382 ,  D21H13/14 ,  D21H13/20 ,  D21H15/10 ,  Y10T428/29 ,  Y10T428/2909 ,  Y10T428/2924 ,  Y10T428/2929 ,  Y10T428/2931 ,  Y10T428/2967

Abstract: The elasticity of elastic, absorbent structures, e.g., diapers, is improved without a significant compromise of the absorbency of the structure by the use of bicomponent and/or biconstituent elastic fiber. The absorbent structures typically comprise a staple fiber, e.g., cellulose fibers, and a bicomponent and/or a biconstituent elastic. The bicomponent fiber typically has a core/sheath construction. The core comprises an elastic thermoplastic elastomer, preferably a TPU, and the sheath comprises a homogeneously branched polyolefin, preferably a homogeneously branched substantially linear ethylene polymer. In various embodiments of the invention, the elasticity is improved by preparation techniques that enhance the ratio of elastic fiber:cellulose fiber versus cellulose fiber:cellulose fiber bonding. These techniques include wet and dry high intensity agitation of the elastic fibers prior to mixing with the cellulose fibers, deactivation of hydrogen bonding between cellulose fibers, and grafting the elastic fiber with a polar group containing compound, e.g. maleic anhydride.

Abstract translation: 通过使用双组分和/或双成分弹性纤维，弹性吸收结构（例如尿布）的弹性得到改善，而不会显着地损害结构的吸收性。 吸收结构通常包含短纤维，例如纤维素纤维，以及双组分和/或双成分弹性体。 双组分纤维通常具有芯/鞘结构。 芯包括弹性热塑性弹性体，优选TPU，并且护套包含均匀支化的聚烯烃，优选均匀支化的基本线性的乙烯聚合物。 在本发明的各种实施方案中，通过提高弹性纤维：纤维素纤维与纤维素纤维的比例的纤维素纤维粘合的制备技术来提高弹性。 这些技术包括在与纤维素纤维混合之前对弹性纤维进行湿式和干式高强度搅拌，纤维素纤维之间的氢键失活和用含极性基团的化合物接枝弹性纤维，例如， 马来酸酐。