Claims
- 1. A high crimp essentially hydrophobic polyolefin-containing fiber obtained by
- A. initially treating corresponding continuous spun fiber or filament with an effective amount for fiber or filament processing of a first modifier composition comprising
- (a) up to about 40% by weight of modifier composition of at least one neutralized phosphoric acid ester represented by the formula ##STR3## wherein Alk is individually defined as a lower alkyl group,
- R is defined as an amino group or an alkali metal,
- n and m are individually defined as positive numbers of
- not less than 1, the sum of which is about 3; and
- (b) about 100%-60% by weight of modifier composition of at least one at least one polysiloxane represented by the formula ##STR4## wherein X and Y are defined as hydrophobic chemical end groups,
- R' is individually defined as a lower alkyl group, and
- o is defined as a positive number of at least about 10;
- B. crimping and applying to said fiber or filament an effective amount for fiber or filament processing of an overfinish of a second modifier composition comprising
- (a) about 100%-50%, by weight of second modifier composition, of at least one neutralized phosphoric acid ester represented by formula (1); and
- (b) up to about 50%, by weight of second modifier composition, of at least one polysiloxane represented by formula (2) in sufficient amount to obtain a final cumulative concentration on the fiber within a range of about 0.01%-1.0% based on fiber weight.
- 2. The high crimp fiber of claim 1 wherein initial spin finish treatment of continuous spun fiber or filament is effected using about 50%-95%, by weight of first modifier composition, of at least one polysiloxane represented by formula (2).
- 3. The fiber of claim 1 wherein the Alk-O group of the neutralized ester is defined as a straight 1-4 carbon alkoxy group; n is 2; and m is 1.
- 4. The fiber of claim 3 wherein the second modifier composition is wholly applied downstream of said crimper.
- 5. The fiber of claim 2 wherein the second modifier composition is topically applied to an at least partially crimped continuous spun fiber or filament.
- 6. The fiber according to claim 1, wherein o is defined as a positive number of about 10 to 50.
- 7. A method for processing polyolefin-containing high crimp spun fiber or filament for production of nonwoven material of high hydrophobicity, comprising
- A. initially treating corresponding continuous spun fiber or filament with an effective amount for fiber or filament processing of a first modifier composition comprising
- (a) up to about 40% by weight of modifier composition of at least one neutralized phosphoric acid ester represented by the formula ##STR5## wherein Alk is individually defined as a lower alkyl group,
- R is defined as an amino group or an alkali metal,
- n and m are individually defined as positive numbers of
- not less than 1, the sum of which is about 3; and
- (b) about 100%-60% by weight of modifier composition of at least one at least one polysiloxane represented by the formula ##STR6## wherein X and Y are individually defined as a hydrophobic chemical end group,
- R' is individually defined as a lower alkyl group, and
- o is defined as a positive number of at least about 10;
- B. crimping the resulting continuous fiber or filament in a crimper;
- C. applying to the continuous fiber or filament, at a point proximate to the crimper, an effective amount for fiber or filament processing of an overfinish of a second modifier composition comprising
- (a) about 100%-50% by weight of second modifier composition, of at least one neutralized phosphoric acid ester represented by formula (1); and
- (b) up to about 50%, by weight of second modifier composition, of at least one polysiloxane represented by formula (2) in sufficient amount to obtain a final cumulative concentration on the fiber within a range of about 0.01%-1.0% based on fiber weight;
- D. processing the resulting modifier-treated fiber or filament to obtain one or more webs for bonding; and
- E. bonding the resulting web(s) to obtain a desired hydrophobic nonwoven material.
- 8. The method of claim 7 wherein the Alk-O group of the neutralized phosphoric acid ester is defined as a straight 1-4 carbon alkoxy group; n is 2; and m is 1.
- 9. The method of claim 7 wherein at least some of the second modifier composition is topically applied upstream of the crimper.
- 10. The method of claim 7 wherein the second modifier composition is topically applied to an at least partially crimped continuous spun fiber or filament.
- 11. The method of claim 7 wherein the "D" processing step comprises a fiber cutting and carding operation.
- 12. The method of claim 7 wherein the second modifier composition comprises 0-15% by weight of a polysiloxane represented by formula (2).
- 13. The method according to claim 7, wherein o is defined as a positive number of about 10 to 50.
- 14. A method for preparing essentially hydrophobic polyolefin-containing fiber or filament, comprising:
- treating continuous polyolefin-containing fiber or filament with:
- a spin finish composition comprising:
- at least one polysiloxane represented by the formula ##STR7## wherein X and Y are defined as hydrophobic chemical end groups,
- R' is individually defined as a lower alkyl group, and
- o is defined as a positive number of at least about 10; crimping the polyolefin-containing fiber or filament; and subsequently treating the polyolefin-containing fiber or filament with at least one neutralized phosphoric acid ester represented by the formula ##STR8## wherein Alk is individually defined as a lower alkyl group, R is defined as an amino group or an alkali metal, n and m are individually defined as positive numbers of not less than about 1, the sum of which is about 3.
- 15. The method according to claim 14, wherein said at least one neutralized phosphoric acid ester is present in an over finish composition.
- 16. The method according to claim 14, wherein said at least one neutralized phosphoric acid ester is also present in said spin finish composition.
- 17. The method according to claim 14, wherein said at least one neutralized phosphoric acid ester is present in said spin finish composition and in an over finish composition.
- 18. The method according to claim 14, wherein the Alk-O group of the neutralized phosphoric acid ester is defined as a straight chain 1-4 carbon alkoxy group; n is 2; and m is 1.
- 19. The method according to claim 14, wherein o is defined as a positive number of about 10 to 50.
- 20. The method according to claim 14, wherein said at least one neutralized phosphoric acid ester is present in an over finish composition.
- 21. The method according to claim 20, wherein said over finish composition further comprises at least one polysiloxane represented by the formula ##STR9## wherein X and Y are defined as hydrophobic chemical end groups,
- R' is individually defined as a lower alkyl group, and
- o is defined as a positive number of at least about 10.
- 22. The method according to claim 20, further comprising processing the polyolefin-containing fiber or filament subsequent to treatment with the over finish composition to obtain at least one web, and bonding the at least one web to obtain a hydrophobic nonwoven material.
- 23. The method according to claim 21, further comprising processing the polyolefin-containing fiber or filament subsequent to treatment with the over finish composition to obtain at least one web, and bonding the at least one web to obtain a hydrophobic nonwoven material.
- 24. The method according to claim 14, wherein said polyolefin-containing fiber or filament comprises a polypropylene fiber or filament.
- 25. A method for preparing essentially hydrophobic polyolefin-containing fiber or filament, comprising:
- treating continuous polyolefin-containing fiber or filament with a spin finish composition, crimping the polyolefin-containing fiber or filament, and subsequently treating the crimped polyolefin-containing fiber or filament with an over finish composition;
- about 100%-60% by weight of the spin finish composition comprising at least one polysiloxane represented by the formula ##STR10## wherein X and Y are defined as hydrophobic chemical end groups,
- R' is individually defined as a lower alkyl group, and
- o is defined as a positive number of at least about 10; and
- about 100%-50% by weight of the over finish composition comprising at least one neutralized phosphoric acid ester represented by the formula ##STR11## wherein Alk is individually defined as a lower alkyl group, R is defined as an amino group or an alkali metal, n and m are individually defined as positive numbers of not less than about 1, the sum of which is about 3.
- 26. The method according to claim 25, wherein the spin finish composition comprises about 100% by weight of the at least one polysiloxane.
- 27. The method according to claim 25, wherein the spin finish composition comprises about 100% by weight of the at least one polysiloxane, and the over finish composition comprises about 100% by weight of the at least one neutralized phosphoric acid ester.
- 28. The method according to claim 25, wherein said spin finish composition comprises up to about 40% by weight of at least one neutralized phosphoric acid ester represented by the formula ##STR12## wherein Alk is individually defined as a lower alkyl group, R is defined as an amino group or an alkali metal, n and m are individually defined as positive numbers of not less than about 1, the sum of which is about 3.
- 29. The method according to claim 25, wherein said over finish composition comprises up to about 50% by weight of at least one polysiloxane represented by the formula ##STR13## wherein X and Y are defined as hydrophobic chemical end groups,
- R' is individually defined as a lower alkyl group, and
- o is defined as a positive number of at least about 10.
- 30. The method according to claim 25, wherein:
- said spin finish composition comprises up to about 40% by weight of at least one neutralized phosphoric acid ester represented by the formula ##STR14## wherein Alk is individually defined as a lower alkyl group, R is defined as an amino group or an alkali metal, n and m are individually defined as positive numbers of not less than about 1, the sum of which is about 3; and
- said over finish composition comprises up to about 50% by weight of at least one polysiloxane represented by the formula ##STR15## wherein X and Y are defined as hydrophobic chemical end groups,
- R' is individually defined as a lower alkyl group, and
- o is defined as a positive number of at least about 10.
- 31. The method according to claim 25, wherein the over finish composition comprises about 100% by weight of the at least one neutralized phosphoric acid ester.
- 32. The method according to claim 31, wherein said spin finish composition comprises up to about 40% by weight of at least one neutralized phosphoric acid ester represented by the formula ##STR16## wherein Alk is individually defined as a lower alkyl group, R is defined as an amino group or an alkali metal, n and m are individually defined as positive numbers of not less than about 1, the sum of which is about 3.
- 33. A method for processing polyolefin-containing high crimp spun fiber or filament for production of nonwoven material of high hydrophobicity, comprising:
- A. initially treating corresponding continuous spun fiber or filament with an effective amount of a first modifier finish composition comprising
- (a) up to about 40% by weight of modifier composition of at least one neutralized phosphoric acid ester represented by the formula ##STR17## wherein Alk is individually defined as a lower alkyl group, R is defined as an amino group or an alkali metal, n and m are individually defined as positive numbers of not less than about 1, the sum of which is about 3; and
- (b) about 100%-60% by weight of first modifier composition of at least one polysiloxane represented by the formula ##STR18## wherein X and Y are defined as hydrophobic chemical end groups,
- R' is individually defined as a lower alkyl group, and
- o is defined as a positive number of at least about 10;
- B. crimping the resulting continuous fiber or filament;
- C. applying to the continuous fiber or filament, at a point proximate to the crimper, an overfinish of a second modifier composition comprising at least one neutralized phosphoric acid ester represented by formula (1);
- D. processing the resulting modifier-treated fiber or filament to obtain and compile at least one web for bonding; and
- E. bonding the resulting at least one web.
- 34. The method according to claim 33, wherein the overfinish composition comprises about 100% by weight of the at least one neutralized phosphoric acid ester.
Parent Case Info
This application is a continuation of application Ser. No. 07/914,213, filed Jul. 15, 1992, now abandoned, which is a continuation of application Ser. No. 07/614,650, filed Nov. 15, 1990, now abandoned.
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Continuations (2)
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Parent |
914213 |
Jul 1992 |
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Parent |
614650 |
Nov 1990 |
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