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High speed melt spinnig of thermoplastic plastics and composition containing the thermoplastic plastics

A thermoplastic, melt spinning technology, applied in the direction of single-component polyester rayon, single-component polyamide rayon, etc., can solve the problems of unmentioned fiber spinning and so on

Inactive Publication Date: 2003-12-17
INVISTA TECHNOLOG IES S A R L
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the patent does not mention fiber spinning

Method used

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  • High speed melt spinnig of thermoplastic plastics and composition containing the thermoplastic plastics
  • High speed melt spinnig of thermoplastic plastics and composition containing the thermoplastic plastics

Examples

Experimental program
Comparison scheme
Effect test

example 1～9 and comparative example A～F

[0052] Pellets of LCP (if used) and technical grade polyethylene terephthalate were compounded in a Becker-Parkin twin-screw extruder. The screw flight diameter was 4.921 cm (1.9375 inches) and the screw was operated at 100 rpm. The feed zone of the extruder was at 230°C and the barrel temperatures were 230°C, 270°C and 290°C. At the end of the extruder, there is a spin pack containing a melt filter pack and a 34-hole spinneret. The melt spinning temperatures are reported in Table 1. The diameter of each hole is 0.38 mm (0.015 inches); the melt throughput is 40 g / hole / h. The as-spun tow is cooled in ambient air without any forced air flow and without any quenching device. The cooled tow was wound at speeds of 1000, 2000 and 4000 m / min after oiling. The throughput per hole remains constant, so as the winding speed increases, the resulting tow becomes thinner. The intrinsic viscosity of the comparative PET after spinning was 0.65. These results are presented in Table 1, al...

example 10～16

[0055] Example 10~16 and Comparative Examples G~M

[0056] The pellets of industrial grade polyethylene terephthalate were mixed in a Becker-Parkin twin-screw extruder. The screw flight diameter was 4.921 cm (1.9375 inches) and the screw was operated at 100 rpm. The feed zone of the extruder was at 230°C and the barrel temperatures were 230°C, 270°C and 290°C. At the end of the extruder, there is a spin pack containing a melt filter pack and a 34-hole spinneret. The melt spinning temperatures are reported in Table 2. The diameter of each hole is 0.23 mm (0.009 inches); the melt throughput is 98 g / hole / h. The as-spun tow is cooled in ambient air without any forced air flow and without any quenching device. The cooled tow was wound at the speeds shown in Table 2 after oiling. The throughput per hole remains constant, so as the winding speed increases, the resulting tow becomes thinner. The intrinsic viscosity of the comparative PET after spinning was 0.65. These results a...

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Abstract

Thermoplastics may be melt spun at high production rates, and without physical property degradation, by spinning a blend of the thermoplastic and a minor amount of a specified liquid crystalline polymer.

Description

field of invention [0001] Thermoplastics can be melt spun at exceptionally high speeds while maintaining the desired properties obtained at lower spinning speeds. This is achieved by adding small amounts of liquid crystal polymers containing repeat units derived from defined monomers. Background of the invention [0002] Fibers, whether made from natural or synthetic thermoplastics, are important industrial articles. These fibers are used in clothing, luggage, threads, and various industrial applications. These fibers are often formed by melt spinning, that is, the thermoplastic is melted, the molten polymer is forced (extruded) through small orifices (spinnerets), cooled, and the extrudate, possibly after a process such as drawing, is After other treatments, it is used as a fiber, see, for example, H. Mark et al., eds., "Encyclopedia of Polymer Science and Engineering", Vol. 6, John Wiley & Sons, New York, 1986, pp.802-839; and W. Edited by Gerhartz et al., "Ullmann Ency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L77/00C08L77/06D01F6/90D01F6/92
CPCD01F6/92C08L67/02D01F6/90C08L77/06C08L77/00C08L67/00
Inventor G·瓦斯拉托斯
Owner INVISTA TECHNOLOG IES S A R L