Claims
- 1. A method for manufacturing sheath-core ion exchange fibers comprising the steps of forming sheath-core conjugate fibers by melt spinning syndiotactic poly(1,2-butadiene) having a melting point (Tm .degree.C.) of 75.ltoreq.Tm<150 as a sheath component and a polypropylene polymer or copolymer as a core component, and subsequently carrying out a chemical treatment or physicochemical treatment on said fibers to introduce ion exchange functional groups selected from the group consisting of sulfonic acid groups and sulfonic acid salt groups thereinto.
- 2. A method of manufacturing sheath-core ion exchange fibers comprising the steps of forming sheath-core conjugate fibers by melt spinning syndiotactic poly(1,2-butadiene) having a melting point (Tm .degree.C.) of 75.ltoreq.Tm<150 as a sheath component and a polypropylene polymer or copolymer as a core component, carrying out a cross-linking treatment on said conjugate fibers with ultraviolet rays or radioactive rays, and subsequently carrying out a chemical treatment or physicochemical treatment on said fibers to introduce ion exchange functional groups selected from the group consisting of sulfonic acid groups and sulfonic acid salt groups thereinto.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2-313716 |
Nov 1990 |
JPX |
|
Parent Case Info
This application is a division of U.S. application Ser. No. 07/791,240, filed Nov. 13, 1991, now U.S. Pat. No. 5,314,922.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5171834 |
Funaki |
Dec 1992 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
62-131004 |
Jun 1987 |
JPX |
Non-Patent Literature Citations (2)
Entry |
Abstract of Japan 3-249,265 (Published Nov. 7, 1991). |
English translation of Japan 62-131,004 (Published Jun. 13, 1987). |
Divisions (1)
|
Number |
Date |
Country |
Parent |
791240 |
Nov 1991 |
|