Manufacturing method of long fiber nonwoven fabric

A technology of non-woven fabric and manufacturing method, which is applied in the directions of non-woven fabric, fiber treatment, fiber chemical characteristics, etc., can solve the problems of poor dimensional stability, unpublished manufacturing of PPS long fiber non-woven fabric, etc., and achieves stable spinnability. Effect

Active Publication Date: 2015-12-09
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the spinning speed is estimated to be less than 3000 m / min from the air velocity of the compressed air. Although the spinning stability is excellent, the dimensional stability is poor, so heat treatment under tension is required in the post-processing.
[0007] As mentioned above, the current situation is that there is no disclosure of a method for producing a PPS long-fiber nonwoven fabric with excellent dimensional stability with stable spinnability and a simple process.

Method used

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  • Manufacturing method of long fiber nonwoven fabric
  • Manufacturing method of long fiber nonwoven fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] (PPS resin)

[0102] Dry a 100 mol% linear polyphenylene sulfide resin (manufactured by Toray Corporation, product number: E2280, MFR: 160 g / 10 minutes) that is not intended to be copolymerized with trichlorobenzene at a temperature of 160° C. 10 hours, use the resin.

[0103] (spinning and forming nonwoven web)

[0104] Melt the above PPS resin with an extruder, at a spinning temperature of 325°C, from the hole diameter A 0.50 mm rectangular spinneret was spun at a single hole discharge rate of 1.38 g / min. The distance from the rectangular spinneret to the rectangular injector was 55 cm, and the spun filaments were cooled and solidified in an atmosphere at a room temperature of 20°C. Make the cooled and solidified filaments pass through the long 30cm rectangular injector of the injector, inject compressed air from the injector, the compressed gas is heated to a temperature of 200°C with an air heater, and the injector pressure is 0.15MPa, traction, pulling The fil...

Embodiment 2

[0108] (PPS resin)

[0109] The same PPS resin as that used in Example 1 was used.

[0110] (Spinning to form a nonwoven web)

[0111] A nonwoven web was formed by spinning using the above-mentioned PPS resin in the same manner as in Example 1, except that the temperature of the compressed air was 230° C. and the ejector pressure was 0.13 MPa. The obtained long fiber had an average single fiber fineness of 3.2 dtex, a crystallization temperature of 112.4°C, a crystallinity of 14.8%, and a boiling water shrinkage of 3.0%. In addition, the spinning speed was 4,294 m / min, the spinnability was good, and there were no yarn breakages during the one-hour spinning period.

[0112] (Temporary bonding, thermal bonding)

[0113] Next, the nonwoven web was temporarily bonded and thermally bonded in the same manner as in Example 1 to obtain a long-fiber nonwoven fabric. When embossing rollers are used for thermal bonding, the obtained long-fiber nonwoven fabric is also of good quality,...

Embodiment 3

[0115] (PPS resin)

[0116] The same PPS resin as that used in Example 1 was used.

[0117] (spinning and forming nonwoven web)

[0118]A nonwoven web was formed by spinning using the above-mentioned PPS resin in the same manner as in Example 1 except that the temperature of the compressed air was 129° C. and the ejector pressure was 0.20 MPa. The obtained long fiber had an average single fiber fineness of 2.4 dtex, a crystallization temperature of 111.4°C, a crystallinity of 18.5%, and a boiling water shrinkage of 7.5%. In addition, the spinning speed was 5,727 m / min, the spinnability was good, and there was no yarn breakage during the spinning period of 1 hour.

[0119] (Temporary bonding, thermal bonding)

[0120] Next, the nonwoven web was temporarily bonded and thermally bonded in the same manner as in Example 1 to obtain a long-fiber nonwoven fabric. When embossing rollers are used for thermocompression bonding, the quality of the obtained long-fiber nonwoven fabric ...

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Abstract

Abstract: Provided is a method for producing a long fiber nonwoven fabric which uses polyphenylene sulfide exhibiting excellent spinnability as the main component, and which involves a simplified step hi which heat treatment, which is performed for the purpose of having dimensional stability against heat, is not performed hi the step after a nonwoven fiber web was formed. The method for producing a long fiber nonwoven fabric involves: a step (a) for obtaining a long fiber by melting a resin which has polyphenylene sulfide as the main component, and by pulling and stretching a thread, which was frozen and solidified after being ejected through a spinneret, at a spinning speed of 3,000m / min or more by means of an ejector, while heating said thread up to the ejector outlet; a step (b) for forming the long fiber into a nonwoven fiber web by collecting the long fiber on a moving net; and a step (c) for thermally adhering the resulting nonwoven fiber web.

Description

technical field [0001] The present invention relates to a method for producing a long-fiber nonwoven fabric made of a resin mainly composed of polyphenylene sulfide (hereinafter, sometimes abbreviated as "PPS"). More specifically, the present invention relates to a non-woven fabric made of PPS as the main component, which does not produce irregular cloth shrinkage or wrinkles caused by heat shrinkage when thermally bonding nonwoven webs with a simple process and stably. A method of a resin-formed long-fiber nonwoven fabric (hereinafter also referred to as "PPS long-fiber nonwoven fabric"). Background technique [0002] PPS resin has excellent characteristics of heat resistance, chemical resistance, flame retardancy and electrical insulation, and is suitable for use as process plastics, films, fibers and non-woven fabrics. In particular, PPS long-fiber nonwoven fabrics are expected to be used in industrial applications such as heat-resistant filters, electrical insulating ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H3/009D04H3/16D01D5/098D01F6/76B29C48/05D04H3/00
CPCD01F6/765D01D5/0985D04H3/00B29C48/05D01D5/098D04H3/009D04H3/02D04H3/14D06C15/00
Inventor 中野洋平矢挂善和
Owner TORAY IND INC
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