公开(公告)号：US20220127758A1

公开(公告)日：2022-04-28

申请号：US17427755

申请日：2020-02-11

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： Aleksandar STOILJKOVIC ,  Barbara BONAVOGLIA ,  Jill M. MARTIN

IPC: D01F6/30 ,  D01D5/088 ,  D01D5/16 ,  A61F13/49

Abstract: A method comprises providing a resin comprising an olefin block copolymer; spinning the resin into one or more fibers; cooling the one or more fibers to below the solidification point of the resin; after cooling, stretching the one or more fibers to a nominal elongation of 50 to 900% to form one or more stretched fibers; and relaxing the one or more stretch fibers to form one or more elastic fibers, and, optionally laminating the fibers to a flexible substrate. Articles comprising such elastic fiber(s) bonded to a nonwoven, can exhibit: a force at 50% elongation of less than 2 Newtons, a force at 100% elongation of less than 4 Newtons, a elongation at five Newtons for a 50 mm sample of at least 120%, and/or an unload force at 50% on a second cycle of less than 1.5 N/50 mm.

公开(公告)号：US20210269626A1

公开(公告)日：2021-09-02

申请号：US17258272

申请日：2019-07-19

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： Glenn POLLEFEYT ,  Barbara BONAVOGLIA ,  Eduardo ALVAREZ

IPC: C08L23/08 ,  C08K3/26

Abstract: A breathable elastic film includes particular amounts of a polyolefin elastomer having a density of 0.860 to 0.890 grams per cubic centimeter, a polyethylene oxide having a Brookfield viscosity in 5 weight percent aqueous solution at 25° C. of 30 to 115 centiPoise, and a hydrophilic filler. The film has a water vapor transmission rate of at least 1,000 g-mil/m2-day, as determined according to ASTM E398-2780. Composite laminates and articles including the films are also disclosed.