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Small diameter polyolefin fibers

A technology of polyolefin fibers and polyolefins, applied in the field of preparing small-diameter polyolefin fibers

Inactive Publication Date: 2016-04-20
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention solves this problem by solving the additional problem of how to produce small diameter (10 micron or less) diameter polyolefin fibers

Method used

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  • Small diameter polyolefin fibers
  • Small diameter polyolefin fibers
  • Small diameter polyolefin fibers

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0055] Examples 1 to 3 show that higher melt draw ratios combined with solid state draw ratios are sufficient to obtain fiber diameters of less than 10 microns. Example 1 further demonstrates the benefit of moderate melt draw ratios combined with solid state draw ratios, resulting in fibers that are both less than 10 microns in diameter and have relatively high tenacity. Examples 2 and 3 used higher melt draw ratios, and while resulting in fiber diameters less than 10 microns, the resulting fibers were less tenacious than Example 1 due to less solid state draw.

[0056] Discontinuous method instance

[0057] Discontinuous Process Examples (Exs) and Comparative Examples (CompExs) were prepared using a melt spinning process line combined with a hot drawing line.

[0058] The melt spinning process lines described for the continuous process examples and comparative examples were used. However, the arrangement of the rolls in the discontinuous process example of manufacture is ...

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Abstract

Prepare a polyolefin fiber having a diameter of 10 microns or less by extruding a molten polyolefin through die holes having diameters in a range of 250 to 500 microns to produce molten polyolefin fibers; drawing the molten polyolefin fibers to achieve a molten draw ratio in a range of 150 to 500 at a temperature in a range of 200 to 250 degrees Celsius; and drawing the polyolefin fibers in a solid state to achieve a solid state draw ratio of 3.0 to 4.0 at a temperature in a range of 40 to 100 degrees Celsius to produce polyolefin fibers having a diameters of 10 microns or less; where the polyolefin is characterized by being a polyolefin copolymer of ethylene and one or more than one alpha-olefin and where the copolymer has a solid density of 0.870 or more and 0.96 or less as determined according to ASTM D792.

Description

[0001] Statement of Government Interests [0002] This invention was made pursuant to NFE-10-02991 of The Dow Chemical Company and UT-Batelle, LLC, Contractor for the Oak Ridge National Laboratory operated by the U.S. Department of Energy ) operation and management. The government has certain rights in this invention. technical field [0003] The present invention relates to methods for preparing small diameter polyolefin fibers, stabilizing these polyolefin fibers and even carbonizing these fibers. Background technique [0004] Polyolefin fibers provide a medium for making carbon fibers that offers cost advantages over other media such as polyacrylonitrile fibers. Polyolefin fibers need to be stabilized prior to carbonization to survive the high temperature carbonization process. Stabilization of polyolefin fibers generally involves sulfonating, oxidizing or crosslinking the polyolefin structure of the fibers. Stabilizing polyolefin fibers increases the cost of the ove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/30D06M11/52D06M11/55D01F9/21B29C48/05
CPCD06M11/52D06M11/55D01F9/21D01D5/16D01F11/06B29C48/05B29C48/0018B29C48/022D01F6/30B29K2023/00B29L2031/707D01D5/098
Inventor M·A·斯伯丁W·王C·L·帕弗里克N·J·霍斯特曼
Owner DOW GLOBAL TECH LLC