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Spunbonded nonwoven fabric

a non-woven fabric and bonded technology, applied in the field of spunbonded non-woven fabrics, can solve the problems of poor moldability, poor heat resistance of sheets, and poor moldability of sheets, and achieve the effect of preventing fusion of fibers, easy cooling, and easy attainment of heat resistance that can withstand practical us

Inactive Publication Date: 2020-08-13
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a spun-bonded nonwoven fabric made of polyolefin-based resin. The fabric has good heat resistance and can withstand practical use. The fabric has a smooth surface and high uniformity in the pore diameter. The polyolefin fibers have a melting point of 80°C to 200°C, preferably 100°C to 180°C, and an average single fiber diameter of 6.5 to 11.9 μm. The fabric has a CV value of 0.1% to 7.0% and an MFR of 155 to 850 g / 10 min. The polyolefin fibers contain a fatty acid amide compound having 23 or more and 50 or less carbon atoms. The technical effects of the invention are improved slipperiness, texture, and softness of the fabric.

Problems solved by technology

However, since the house wrapping material in the related art is a laminate of a nonwoven fabric and a film, there is a problem that the sheet is hard and has poor moldability.
The hardness and the poor moldability of the sheet are due to the film, and reducing a proportion of the film to be bonded is effective, but the reduction of the film proportion is restricted in view of waterproofness.

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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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0106]A polypropylene resin made of a homopolymer having a melt flow rate (MFR) of 200 g / 10 min was melted with an extruder and discharged from a rectangular spinneret having a spinning temperature of 235° C., a hole diameter φ of 0.30 mm, and a hole depth of 2 mm at a single-hole discharge rate of 0.32 g / min. The resultant filaments were cooled and solidified by blowing cold air with 13% variation in wind speed, subsequently drawn and stretched by compressed air jetted from a rectangular ejector at an ejector pressure of 0.35 MPa. A fiber spreading device in which a flat plate having a width of 2 cm and a length of 10 cm facing right downward and a flat plate having a width of 2 cm and a length of 10 cm inclined 10° to 30° on an upstream side of the sheet flow direction were alternately arranged in a comb-tooth shape at an ejector outlet was provided. The filaments were dispersed and spread in the sheet flow direction along the flat plates, and collected on a moving net. A nonwoven...

example 2

[0108]A nonwoven fabric composed of long polypropylene fibers was obtained by the same method as in Example 1, except that the single-hole discharge rate was changed to 0.21 g / min, and the ejector pressure was changed to 0.50 MPa. The spun-bonded long fibers obtained had the following properties. The average single fiber diameter was 7.2 μm, and the spinning speed calculated therefrom was 5,700 m / min. With respect to spinnability, no filament breakage occurred during 1-hour spinning, and the fiber had good spinnability. The results thereof are shown in Table 1.

example 3

[0109]A nonwoven fabric composed of long polypropylene fibers was obtained by the same method as in Example 1, except that the ejector pressure was changed to 0.50 MPa. The spun-bonded long fibers obtained had the following properties. The average single fiber diameter was 8.9 μm, and the spinning speed calculated therefrom was 5,600 m / min. With respect to spinnability, no filament breakage occurred during 1-hour spinning, and the fiber had good spinnability. The results thereof are shown in Table 1.

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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Abstract

A spunbonded nonwoven fabric of the present invention is characterized by being composed of a polyolefin fiber, wherein the average pore diameter of the nonwoven fabric surface is 0.1-25 μm, the maximum pore diameter is 50 μm or less, and the water pressure resistance per unit basis weight is 7 mmH2O / (g / m2) or more.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This is the U.S. National Phase application of PCT / JP2018 / 040408, filed Oct. 30, 2018, which claims priority to Japanese Patent Application No. 2017-211607, filed Nov. 1, 2017 and Japanese Patent Application No. 2018-141052, filed Jul. 27, 2018, the disclosures of each of these applications being incorporated herein by reference in their entireties for all purposes.FIELD OF THE INVENTION[0002]The present invention relates to a spun-bonded nonwoven fabric composed of polyolefin fibers, which is excellent in waterproofness and softness, and is excellent in moldability as building material applications.BACKGROUND OF THE INVENTION[0003]In recent years, nonwoven fabrics have been used in various applications and are expected to grow in the future. The nonwoven fabrics are employed in a wide range of applications such as industrial materials, civil engineering materials, building materials, living materials, agricultural materials, sanitary mat...

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(United States)
IPC IPC(8): D04H3/007D01F6/46D04H3/16
CPCD01F6/46D04H3/007D10B2321/022D04H3/16D01D5/0985D01F6/04D01F1/10D01F6/06D04H3/14D04H3/016D10B2401/021
Inventor ENDO, MASANORINAKANO, YOHEIHANE, RYOICHI
Owner TORAY IND INC
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