Claims
- 1. A concentric stretched conjugated yarn having
- (A) A polyolefin core component which is initially prestretched to have a double refraction index of from 10.times.25.sup.-3 to 25.times.10.sup.-3, and
- (B) A concentric sheath component which is a polyamide or polyester fused resin and which is initially unoriented,
- with the proviso that the conjugated yarn is stretched until the double refraction index of the polyolefin core component is at least 30.times.10.sup.-3.
- 2. The conjugated yarn of claim 1, wherein the crystalline resin sheath component is a polyamide or a polyester.
- 3. The conjugated yarn of claim 2, wherein the double refraction index of the polyolefin core component is not more than 40.times.10.sup.-3.
- 4. The conjugated yarn of claim 2, wherein the crystalline resin sheath component is a polyamide whose double refraction index after stretching is from about 40.times.10.sup.-3 to about 60.times.10.sup.-3.
- 5. The conjugated yarn to claim 2, wherein the crystalline resin sheath component is a polyester whose double refraction index after stretching is from about 230.times.10.sup.-3 to about 300.times.10.sup.-3.
- 6. The conjugated yarn of claim 2, wherein the polyolefin core component is polypropylene or polyethylene.
- 7. The conjugated yarn of claim 4, wherein the polyamide is nylon 6.
- 8. The conjugated yarn of claim 6, wherein there is an adhesive layer between the core and the sheath.
Priority Claims (1)
Number |
Date |
Country |
Kind |
52-89197 |
Jul 1977 |
JPX |
|
Parent Case Info
This is a divisional of application Ser. No. 928,301, filed July 26, 1978, now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
2291670 |
Wiley et al. |
Aug 1942 |
|
3463652 |
Whitesel et al. |
Aug 1969 |
|
3886015 |
Turner |
May 1975 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
928301 |
Jul 1978 |
|