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Melt-blown nonwoven fabric for liquid filter, layered body of said melt-blown nonwoven fabric, and liquid filter equipped with layered body

A technology for melt-blown non-woven fabrics and liquid filters, which is applied in membrane filters, filtration separation, non-woven fabrics, etc. Good properties, high uniformity, fluffy surface area

Active Publication Date: 2021-08-20
TAPYRUS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]However, the thicker the fiber diameter, the greater the variation in the physical properties of the nonwoven fabric, and the filtration performance may decrease
In addition, the melt-blown non-woven fabric has excellent cloth properties, but the compression resistance in the thickness direction is low, so the bulkiness of the non-woven fabric is lost due to the pressure of the filtered fluid when the filter is filtered, and sometimes the pressure loss increases and the life of the filter reduce

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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  • Melt-blown nonwoven fabric for liquid filter, layered body of said melt-blown nonwoven fabric, and liquid filter equipped with layered body
  • Melt-blown nonwoven fabric for liquid filter, layered body of said melt-blown nonwoven fabric, and liquid filter equipped with layered body
  • Melt-blown nonwoven fabric for liquid filter, layered body of said melt-blown nonwoven fabric, and liquid filter equipped with layered body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] In the raw material hopper of the melt-blown manufacturing device, the homopolypropylene resin (weight-average molecular weight 1.7×10) that MFR is dropped into is 40 5 . The same applies to the following Examples and Comparative Examples), and the melt-kneading temperature was set to 330°C. With the distance between the die head and the collector 150mm, the resin and 290°C heated compressed air 25Nm 3 / min together from the nozzle to the atmosphere, contact with 20 ° C quench air for cooling 17m 3 / min later, at a suction volume of 60m 3 Fibrous resin is continuously collected on the collector at a rate of 1 / min, and the rotation speed of the collector is properly adjusted to obtain an average fiber diameter of 21.0 μm and an average weight per unit area of ​​45 g / m 2 , The maximum height A of the protrusion is 2.02 mm, the thickness B of the non-woven fabric is 0.09 mm, the thickness ratio A / B is 22.4, and the melt-blown non-woven fabric has a formation index of 32...

Embodiment 2

[0099] A homopolymer polypropylene resin with an MFR of 40 was charged into a raw material hopper of a melt-blown manufacturing device, and the melt-kneading temperature was set at 390°C. With the distance between the die head and the collector 200mm, the resin and 290°C heated compressed air 25Nm 3 / min together from the nozzle to the atmosphere, contact with the quenching air of 20 ℃ for cooling 17m 3 / min later, at a suction volume of 60m 3 The fibrous resin is continuously collected on the collector at a rate of 1 / min, and the rotation speed of the collector is properly adjusted to obtain an average fiber diameter of 33.6 μm and an average weight per unit area of ​​45 g / m 2 , The maximum height A of the protruding part is 2.10mm, the thickness B of the nonwoven fabric is 0.09mm, the thickness ratio A / B is 23.3, and the melt blown nonwoven fabric is 370. Regarding compression resistance, the thickness ratio A' / A was 0.85, and the air permeability ratio T' / T was 0.99.

Embodiment 3

[0101] A homopolypropylene resin with an MFR of 40 was charged into a raw material hopper of a melt-blown manufacturing device, and the melt-kneading temperature was set to 330°C. With the distance between the die head and the collector 200mm, the resin and 290°C heated compressed air 25Nm 3 / min together from the nozzle to the atmosphere, contact with the quenching air of 20 ℃ for cooling 17m 3 / min later, at a suction volume of 60m 3 Fibrous resin is continuously collected on the collector at a rate of 1 / min, and the speed of the collector is properly adjusted to obtain an average fiber diameter of 22.6 μm and an average weight per unit area of ​​45 g / m 2 , The maximum height A of the protruding part is 2.09mm, the thickness B of the nonwoven fabric is 0.12mm, the thickness ratio A / B is 17.4, and the melt blown nonwoven fabric is 350. Regarding the compression resistance, the thickness ratio A' / A was 0.86, and the air permeability ratio T' / T was 0.99.

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Abstract

This melt-blown nonwoven fabric for liquid filter use has a plurality of protrusions, wherein the ratio A / B, of the maximum height A of the protrusions to the thickness B of the nonwoven fabric is 10 to 30, and the formation index is 150 to 450.

Description

technical field [0001] [Cross Reference to Related Application] [0002] This application claims priority based on Japanese Patent Application No. 2019-68090 specification for which it applied on March 29, 2019 (the entire disclosure content is incorporated in this specification by reference). The present invention relates to a meltblown nonwoven fabric for liquid filters, a laminate of the meltblown nonwoven fabric, and a filter for liquid including the laminate. Background technique [0003] Melt-blown nonwoven fabrics for liquid filters use various nonwoven fabrics with different weight per unit area, thickness, fiber diameter, and pore diameter according to the properties of the filter material and the required filtration accuracy. For example, the fiber diameter of melt-blown non-woven fabrics is usually about 1 to 10 μm, but in recent studies, melt-blown non-woven fabrics using nanofibers of 1 μm or less to melt-blown non-woven fabrics using thick fibers of tens of μm...

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): B01D39/16D04H3/16
CPCD04H3/16B01D39/16Y02E60/10B01D39/1623B01D2239/0622B01D2239/065
Inventor 田村智彦
Owner TAPYRUS CO LTD
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