发明名称 |
Processes to produce short cut microfibers |
摘要 |
A process for producing a microfiber product stream is provided comprising:
(A) contacting short cut multicomponent fibers having a length of less than 25 millimeters with a treated aqueous stream in a fiber slurry zone to produce a short cut multicomponent fiber slurry;(B) contacting the short cut multicomponent fiber slurry and a heated aqueous stream in a fiber opening zone to remove a portion of the water dispersible sulfopolyester to produce an opened microfiber slurry; and(C) routing the opened microfiber slurry to a primary solid liquid separation zone to produce the microfiber product stream and a first mother liquor stream. |
申请公布号 |
US8840757(B2) |
申请公布日期 |
2014.09.23 |
申请号 |
US201213687472 |
申请日期 |
2012.11.28 |
申请人 |
Eastman Chemical Company |
发明人 |
Parker Kenny Randolph;Klosiewicz Daniel William;Munjal Ramesh Chand;Rogers David J;Tremaine Dustin A |
分类号 |
B01D12/00;C08G63/688;D21H13/24;B01D11/02 |
主分类号 |
B01D12/00 |
代理机构 |
|
代理人 |
Owen Polly C. |
主权项 |
1. A process for producing a microfiber product stream, said process comprising:
(A) contacting short cut multicomponent fibers having a length of less than 25 millimeters with a treated aqueous stream in a fiber slurry zone to produce a short cut multicomponent fiber slurry; wherein said short cut multicomponent fibers comprise at least one water dispersible sulfopolyester and at least one water non-dispersible synthetic polymer immiscible with said water dispersible sulfopolyester; and wherein said treated aqueous stream is at a temperature of 40° C. or less; (B) mixing said short cut multicomponent fiber slurry and a heated aqueous stream in a fiber opening zone for a sufficient time to remove a portion of said water dispersible sulfopolyester to produce an opened microfiber slurry at a temperature in the range of about 55° C. to about 100° C.; wherein said opened microfiber slurry comprises water non-dispersible polymer microfiber, water dispersible sulfopolyester, and water; wherein the weight % of solids in said opened microfiber slurry ranges from 0.1 weight % to about 20 weight %; wherein said water non-dispersible polymer microfiber has a minimum transverse dimension of less than 10 microns; and wherein at least about 50 weight % of said water non-dispersible polymer microfiber is suspended in said opened microfiber slurry; (C) routing said opened microfiber slurry to a primary solid liquid separation zone to produce said microfiber product stream and a first mother liquor stream; wherein said first mother liquor stream comprises water and said water dispersible sulfopolyester; and (D) routing at least a portion of said first mother liquor stream to a second solid liquid separation zone to produce a secondary wet cake stream and a second mother liquor stream; wherein said second mother liquor stream comprises water and water dispersible sulfopolyester; and wherein said secondary wet cake stream comprises microfiber. |
地址 |
Kingsport TN US |