Claims
- 1. A fiber comprising poly(metaphenylene isophthalamide) containing distributed substantially throughout its whole interior finely divided deposits comprised of a tetrakis hydroxymethyl phosphonium compound cross-linked to a reactive resin selected from the group of melamine formaldehyde condensates and phenol formaldehyde condensates in an amount sufficient to provide at least 0.4% by weight phosphorus, based on the total weight of fiber, the phosphonium compound and the reactive resin having been absorbed into water-swollen, never dried poly(methaphenylene isophthalamide) fibers before cross-linking.
- 2. The fiber of claim 1 wherein the weight of phosphorus is no more than 2.1%.
- 3. The fiber of claim 2 wherein the deposits are the reaction product of 2-4 parts phosphorus compound to each part resin compound and the weight of phosphorus is at least 0.7%.
- 4. The fiber of claim 1 wherein the deposits are the reaction product of tetrakis hydroxymethyl phosphonium compound and melamine-formaldehyde condensate.
- 5. A yarn of the fibers of claim 1.
- 6. A fabric of the yarn of claim 5.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of U.S. patent application Ser. No. 383,038, filed July 26, 1973 now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
2772188 |
Reeves |
Nov 1956 |
|
3681124 |
Sello et al. |
Jun 1972 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
871581 |
Sep 1961 |
GBX |
1169194 |
Oct 1969 |
GBX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
383038 |
Jul 1973 |
|