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Melt-spun elastic fibers with flat modulus

A fiber and modulus technology, applied in the field of high-strength fabrics, which can solve problems such as bloated fabrics, loss of comfort of multi-filament bundles, etc.

Active Publication Date: 2017-02-22
LUBRIZOL ADVANCED MATERIALS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These physical properties produce a bulkier fabric, and the multi-tow nature results in a loss of comfort

Method used

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  • Melt-spun elastic fibers with flat modulus
  • Melt-spun elastic fibers with flat modulus
  • Melt-spun elastic fibers with flat modulus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] This example is given to show the relative performance of the fibers of the invention (70 denier) compared to prior art melt spun TPU fibers (40 denier) and commercially available dry spun fibers (70 denier). Flat modulus curve.

[0104] The test procedure employed was as described above for testing elastic properties. An InstronModel 5564 extensometer with Merlin software was used. The test conditions are 23°C±2°C and 50%±5% humidity. The fiber length of the test specimen was 50.0 mm. Four samples were tested and the results are the average of the 4 test samples. The results are shown in Table I.

[0105] Table I

[0106]

[0107] The above data are the average value of 4 samples tested.

[0108]From the above data it can be seen that the melt spun fibers of the present invention had a relatively flat modulus curve during the 5th test cycle. The first cycle is usually of no concern as this relieves stress in the fiber.

Embodiment 2

[0110] This example is given to show the breadth of the melt spun fibers of the present invention compared to commercially available dry spun fibers. Width is determined by SEM. The results are shown in Table II.

[0111] Table II

[0112]

[0113] From the above it can be seen that the dry spun fibers have a much higher width and the difference becomes larger as the denier increases.

Embodiment 3

[0115] This example is given to show the improved burst strength of the melt spun TPU fibers of the present invention compared to commercially available dry spun polyurethane fibers. Single jersey fabrics of various fiber types were prepared using 70 denier fibers. Burst puncture strength tested on fabrics according to ASTM D751. The results are shown in Table III. Results are the average of 5 samples tested.

[0116] Table III

[0117] test dry spinning Melt spinning Load at Failure (lbs) 5.78 9.03 Displacement at Failure (in.) 8.7 10.6 Load / Thickness at Failure (lbf / in.) 705 1250 Energy to Failure (lbf-in) 23.0 40.8

[0118] Very surprisingly, although the melt spun fibers of the present invention do not have higher tensile strength than dry spun fibers, the burst strength of the melt spun fibers is higher.

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Abstract

Melt spun fibers having an ultimate elongation of at least 400% and having a relatively flat modulus over loading and unloading cycles of 100% to 200% elongation. A method of making said fibers.

Description

[0001] field of invention [0002] This invention relates to high strength fabrics made from thin gauge constant compression elastic fibers. Garments made from this constant compression elastic fiber have a more comfortable feel for the wearer. The garment is puncture resistant due to the high strength fabric made from this elastane. [0003] Background of the invention [0004] In recent years, the demand for more functional garments has increased the demand for compression fabrics. These fabrics, while providing compression, also become uncomfortable as more and more heat builds up and often becomes too tight or too heavy or bulky. It is desirable for garments to provide an optimum degree of compression for the wearer without loss of comfort. There is also a desire for thinner gauge fabrics which enable less bulk, a reduced "bulky" feel and, in the case of underwear, no external visibility through the outer garment. [0005] Synthetic elastic fibers (SEF) are generally ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/08D01F6/70D03D15/08D03D15/56
CPCD01D5/08D10B2331/10D10B2401/041D10B2501/00D01F6/70Y10T428/2913D03D15/33D03D15/56C08G18/3221C08G18/7685D01F6/62D10B2331/04
Inventor R·R·威杜拉小J·E·布里森M-W·李D·M·菲舍C·A·斯普拉格
Owner LUBRIZOL ADVANCED MATERIALS INC