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Porous PET cellular fiber, and preparation method

A fiber and foam technology, applied in the field of porous PET foam fiber and its preparation, can solve problems such as insufficient heat retention, and achieve the effects of excellent thermal insulation, reduced apparent specific gravity and improved thermal insulation performance

Inactive Publication Date: 2006-04-19
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is still not enough for light weight and thermal insulation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Put 20 grams of 5dtex PET fibers into a high-pressure container, keep the temperature at 25°C, increase the pressure to 5.5MPa, and keep the pressure constant for 28 hours. Release the pressure and take it out, then keep it warm at 100°C for about 15 seconds. It is measured that there are a large number of foams with a diameter of about 4 μm in the fiber, and the foam density (ρ c ) is 1.2×10 9 cell / cm 3 . Fiber thermal conductivity is 0.62W / m / K.

Embodiment 2

[0025] Put 20 grams of 5dtex PET fibers into a high-pressure container, keep the temperature at 25°C, increase the pressure to 1.5MPa, and keep the pressure constant for 28 hours. Release the pressure and take it out, then keep it warm at 50°C for 200 seconds. It is measured that there are a large number of foams with a diameter of about 4 μm in the fiber, and the foam density (ρ c ) is 6×10 5 cell / cm 3 . Fiber thermal conductivity is 0.84W / m / K.

Embodiment 3

[0027] Put 20 grams of 5dtex PET fibers into a high-pressure container, keep the temperature at 50°C, increase the pressure to 10MPa, and keep the pressure constant for 220 hours. Release the pressure and take it out, then keep it warm at 200°C for 2 seconds. It is measured that there are a large number of foams with a diameter of about 12 μm in the fiber, and the foam density (ρ c ) is 5.8×10 10 cell / cm 3 . The fiber thermal conductivity is 0.57 W / m / K.

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Abstract

The present invention discloses a porous PET foam fibre and its preparation method. It is characterized by that under the condition of high pressure the inert gas can be pressed into conventional or shaped PET fibre, and a heat-treatment process is used to make the gas pressed into the fibre be expanded so as to form the invented porous PET foam fibre whose apparent specific weight can be reduced by 10-80% and heat retaining power can be raised by 40-90%. Said invention also provides the concrete steps of its preparation method.

Description

technical field [0001] The invention relates to a foam fiber and a preparation method thereof, in particular to a porous PET foam fiber and a preparation method thereof. Background technique [0002] In order to improve the dirt storage, warmth retention, bulkiness, resilience and light weight of chemical fibers, hollow fibers were developed in the early 1960s, and porous hollow fibers and special-shaped hollow fibers were developed after the 1970s. But for light weight and thermal insulation, it is still not enough. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a porous PET foam fiber and its preparation method, so as to make up for the deficiencies or defects of the prior art and meet the needs of production or life. [0004] In order to solve the above-mentioned technical problems, one of the technical solutions adopted in the present invention is: a porous PET foam fiber, which is obtained by pressing an i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02J1/02D01F6/62
Inventor 王依民熊春燕李传
Owner DONGHUA UNIV