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Spunbonded nonwoven fabric and production method therefor

A technology of spunbond nonwoven fabrics and manufacturing methods, applied in textiles and papermaking, chemical instruments and methods, nonwoven fabrics, etc., can solve problems such as curling in the width direction of spunbond nonwoven fabrics, and achieve excellent spinnability, surface Effect of smooth and firm film adhesion

Active Publication Date: 2019-04-16
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a large temperature difference is set between the upper and lower rollers of the metal flat press roller as in this proposal, or a non-heated elastic roller is used for thermal bonding, there will inevitably be problems in the spunbonded nonwoven fabric. The problem of curling in the width direction of the spunbonded nonwoven fabric due to the difference between the surface and the back

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Spunbonded nonwoven fabric and production method therefor
  • Spunbonded nonwoven fabric and production method therefor
  • Spunbonded nonwoven fabric and production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0193] (core ingredient)

[0194] A polyethylene terephthalate resin having an intrinsic viscosity (IV) of 0.65, a melting point of 260° C., and a titanium oxide content of 0.3% by mass was dried to a moisture content of 50 ppm or less, and was used as a core component.

[0195] (sheath component)

[0196] A copolymerized polyethylene terephthalate resin having an intrinsic viscosity (IV) of 0.66, a copolymerization rate of isophthalic acid of 11 mol%, a melting point of 230°C, and a titanium oxide content of 0.2% by mass is dried to a moisture content of 50 ppm or less , the resin thus obtained was used as a sheath component.

[0197] (spun and non-woven mesh capture)

[0198] The above-mentioned core component and sheath component were melted at 295°C and 270°C, respectively, and the mass ratio of the core component and sheath component was 80 / 20 under the condition of the spinneret temperature of 300°C, and the compound was formed into a concentric core-sheath type (circul...

Embodiment 2

[0206] (spunbonded nonwoven fabric)

[0207] Make the weight per unit area of ​​the spunbond nonwoven fabric 50g / m 2 , except that, in the same manner as in Example 1, the apparent single fiber fineness was 1.2dtex, and the weight per unit area was 50g / m 2 , thickness is 0.09mm, apparent density is 0.57g / cm 3 , Movable amorphous volume is 41%, Air permeability is 21.8cc / cm 2 • A spun-bonded nonwoven fabric with a Buick smoothness of 11.9 seconds on both sides.

[0208] (Separation Membrane Formation)

[0209] Furthermore, a polysulfone membrane was formed into a membrane in the same manner as in Example 1 with respect to the obtained spunbonded nonwoven fabric. At this time, the cast solution was slightly shown through, and the film was not bent from unwinding to winding, and peeling of the film was not observed, and the film forming property was good. The peel strength of the obtained polysulfone membrane was 2.7 N / 5 cm. The results are shown in Table 1.

Embodiment 3

[0211] (spunbonded nonwoven fabric)

[0212] Make the unit area weight of the spunbonded nonwoven fabric 100g / m 2 , except that, in the same manner as in Example 1, the apparent single fiber fineness was 1.2dtex, and the weight per unit area was 100g / m 2 , thickness is 0.14mm, apparent density is 0.70g / cm 3 , Movable amorphous volume is 41% あり, Air permeability is 4.6cc / cm 2 Spun-bonded non-woven fabric with Buick smoothness of 4.8 seconds.

[0213] (Separation Membrane Formation)

[0214] Furthermore, a polysulfone membrane was formed into a membrane in the same manner as in Example 1 with respect to the obtained spunbonded nonwoven fabric. At this time, no back-through of the casting solution occurred, the film was not bent from unwinding to winding, and peeling of the film was not observed, and the film forming property was good. As for the peel strength, it could not be measured because the polysulfone membrane was broken during the test, and the membrane was firmly b...

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Abstract

The present invention provides a spunbonded nonwoven fabric that: has a smooth surface; is highly unlikely to cause a widthwise curl due to a difference between the states of front and back surfaces;has a superior film forming property of not allowing, at the time of casting of a resin solution, a bleed-through of the resin solution due to excessive permeation, a peel-off of a film material, or any other defect such as nonuniform film or pin hole due to fluffing, etc., of a base; and further exhibits film-adhesiveness that is strong enough to prevent the film material from peeling off after film formation.

Description

technical field [0001] The present invention relates to a spun-bonded nonwoven fabric having a smooth surface, especially excellent film-forming properties, and a method for producing the same. Background technique [0002] In water treatment in recent years, membrane technology is applied in many cases. For example, microfiltration membranes or ultrafiltration membranes can be used in water purification plants, reverse osmosis membranes can be used in seawater desalination, and reverse osmosis membranes can be used in semiconductor manufacturing water, boiler water, medical water, and laboratory pure water. , nanofiltration membranes, and membrane separation activated sludge methods using microfiltration membranes and ultrafiltration membranes can also be applied in wastewater treatment. [0003] As far as the above-mentioned separation membrane is concerned, it can be roughly divided into flat membrane and hollow fiber membrane according to its shape. The flat membrane ma...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/147B01D63/00D04H3/011
CPCD04H3/011D04H3/147D04H3/033D04H3/016B01D2323/39B01D69/1071B01D63/00C02F1/44D04H3/03D04H3/16D10B2331/04D10B2505/04
Inventor 岛田大树池尻祐希中野洋平
Owner TORAY IND INC
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