Claims
- 1. A self-crimping, melt-spun acrylonitrile polymer fiber comprising as the continuous fiber matrix a first polymer comprising from about 80 to about 99 weight percent acrylonitrile and from about 1 to about 20 weight percent of one or more monomers copolymerizable with acrylonitrile and heterogeneously dispersed within said fiber matrix a second polymer selected from the group consisting of polyethylene and polypropylene incompatible with said first polymer and having thermal and/or hydrophilic properties which differ from those of said first polymer by an amount sufficient to provide self-crimping properties to said fiber, said first polymer constituting the major weight proportion of said fiber.
- 2. The fiber of claim 1 wherein said first polymer is a graft of acrylonitrile, methyl methacrylate and acrylamidomethylpropane sulfonic acid on polyvinyl alcohol.
- 3. The fiber of claim 1 wherein said second polymer is polypropylene.
- 4. The fiber of claim 2 wherein said second polymer is polypropylene.
Parent Case Info
This is a division of application Ser. No. 129,765, filed Mar. 12, 1980, now U.S. Pat. No. 4,301,104.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
Country |
Parent |
129765 |
Mar 1980 |
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