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公开(公告)号：US20230272180A1
公开(公告)日：2023-08-31
申请号：US18016087
申请日：2021-07-06
Applicant: DOW GLOBAL TECHNOLOGIES LLC
Inventor： Craig F. GORIN , David L. MALOTKY , Daniel L. DERMODY , Christopher J. TUCKER , Jin WANG , Anurima SINGH , Jill M. MARTIN , Thomas TOMCZAK , Hari KATEPALLI
CPC classification number: C08J11/06 , B01D11/0226 , B01D11/0288 , B29B17/02 , B29B13/022 , C08J2323/06 , B29B2013/002
Abstract: A method for reducing an amount of a contaminant in a thermoplastic polymer comprising shearing a combination comprising a contaminated thermoplastic polymer in melt form, water, and a dispersing agent where the shearing causes a portion of the contaminant to be removed from the contaminated thermoplastic polymer (e.g. moved into an aqueous phase with the water or into another separate phase from the water and the polymer), and after shearing, separating the thermoplastic from the aqueous phase to recover thermoplastic polymer.
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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
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.
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