Claims
- 1. A process for preparing continuous straight blow spun fibers from a mesophase pitch, said process comprising:passing said mesophase pitch through capillaries located within a blow spinning die to form said mesophase pitch into fibers; attenuating said fibers by contracting said fibers with an attenuating gas; and following attenuation, maintaining sufficient tension on said fibers to preclude the formation of slack by collecting said fibers on a receiving device selected from the group consisting of bobbins, rolls and windups and combinations thereof.
- 2. The process of claim 1, wherein said fibers are collected as either a warp sheet or a traversed continuous filament tow.
- 3. The process of claim 2, wherein said warp sheet or traversed continuous filament tow is further processed into an unidirectional filament roving fabric.
- 4. The process of claim 1, wherein prior to collecting said fibers on said receiving device, gases and vapors are removed from said fibers.
- 5. The process of claim 1, wherein said gases and vapors are removed by cross-flow ventilation applied to the fibers prior to the receiving device.
- 6. A process for preparing continuous straight blow spun fibers comprising heating a spinnable substance to a temperature sufficient to allow said substance to flow followed by forming continuous fibers by passing said substance into a spinning die and through capillaries located within said die and attenuating said fibers as they exit the capillary by contacting said fibers with at least one stream of gas wherein the improvement comprises:following attenuation of said fibers, maintaining tension on said fibers by means of a tensioning device selected from the group consisting of bobbins, rolls and windups and combinations thereof.
- 7. The process of claim 6, additionally including the step of collecting said fibers as a warp sheet or traversed continuous filament tow on a windup device positioned to receive said fibers from said tensioning device.
- 8. The process of claim 7, including the step of removing gases and vapors prior to collecting said fibers.
- 9. The process of claim 7, wherein prior to collecting said fibers cross-flow ventilation is applied to the fibers.
Parent Case Info
This is a divisional application of copending Ser. No. 09/149,151 filed on Sep. 8, 1998, now abandoned, which is based on Provisional Patent Application Serial No. 60/066,275 filed on Nov. 20, 1997.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5648041 |
Rodgers et al. |
Jul 1997 |
A |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/066275 |
Nov 1997 |
US |