Wet-laid non-woven fabric and filter

A wet non-woven and non-woven technology, applied in membrane filter, filtration separation, textile and other directions, can solve the problems of insufficient filter quality, uneven fiber length, fiber diameter, and no capture efficiency.

Active Publication Date: 2010-03-24
TEIJIN FRONTIER CO LTD
View PDF5 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when a conventional wet-laid nonwoven fabric containing polyester fibers is used as a filter, the pores appearing on the surface of the wet-laid nonwoven fabric have uneven pore diameters, so there is a problem that sufficient collection efficiency cannot be obtained.
On the other hand, when a wet-laid nonwoven fabric containing fine glass and synthetic pulp is used as a filter, the fiber length and fiber diameter of the fine glass and synthetic pulp are not uniform, so there is a problem that the quality of the filter is insufficient.

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wet-laid non-woven fabric and filter
  • Wet-laid non-woven fabric and filter
  • Wet-laid non-woven fabric and filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] The island component uses polyethylene terephthalate with a melt viscosity of 120 Pa·sec at 285°C, and the sea component uses 4% by weight of polyethylene glycol with an average molecular weight of 4000 and a melt viscosity of 135 Pa·sec at 285°C. Modified polyethylene terephthalate obtained by copolymerization with 9 mol% sodium isophthalic acid-5-sulfonate, using a spinneret with 400 islands at a weight ratio of sea:island=10:90 Spinning and winding were performed at a spinning speed of 1500 m / min. The difference in alkali decrement speed is 1000 times. This was stretched to 3.9 times, and cut to 1000 μm with a guillotine cutter to obtain a conjugate fiber for staple fiber A. Use 4% NaOH aqueous solution to reduce its weight by 10% at 75 ° C. As a result, it can be seen that the ultrafine short fibers with relatively uniform fiber diameter and fiber length are produced. This fiber is used as short fiber A (fiber diameter 750nm, fiber length 1mm, L / D=1333, circular ...

Embodiment 2

[0080] Except for changing the ratio of the fibers used in Example 1 (short fiber A / binder fiber B / other fibers=50 / 30 / 20), the treatment / processing was performed under the same conditions to obtain a wet-laid nonwoven fabric. Table 1 shows the physical properties of the obtained wet-laid nonwoven fabric.

Embodiment 3

[0082] Except for changing the ratio of the fibers used in Example 1 (short fiber A / binder fiber B / other fibers=20 / 50 / 30), the treatment / processing was performed under the same conditions to obtain a wet-laid nonwoven fabric. Table 1 shows the physical properties of the obtained wet-laid nonwoven fabric.

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
Login to view more

PUM

PropertyMeasurementUnit
glass transition temperatureaaaaaaaaaa
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

Disclosed is a wet-laid non-woven fabric comprising two or more types of fibers. Specifically disclosed is a wet-laid non-woven fabric comprising a short fiber A in an amount of 4 to 50 wt% and a binder fiber B in an amount of 10 to 50 wt% both relative to the total weight of the non-woven fabric, wherein the short fiber A comprises a fiber-forming thermoplastic polymer, has a fiber diameter (D) of 100 to 1000 nm and has a ratio of the fiber length (L) to the fiber diameter (D) (i.e., a L / D ratio) of 100 to 2500, and wherein the binder fiber B has a single fiber fineness of 0.1 dtex or less.

Description

technical field [0001] The present invention relates to a wet-laid nonwoven fabric which contains two or more kinds of fibers and can obtain a filter having excellent collection efficiency, and a filter using the wet-laid nonwoven fabric. Background technique [0002] Conventionally, wet-laid nonwoven fabrics have been widely used in various filter applications. In addition, polyester fibers, fine glass, polyethylene synthetic pulp, para-aramid synthetic pulp, and the like are known as raw materials for wet-laid nonwoven fabrics (for example, refer to Patent Document 1 and Patent Document 2). [0003] However, when a conventional wet-laid nonwoven fabric containing polyester fibers is used as a filter, there is a problem that sufficient collection efficiency cannot be obtained because pores appearing on the surface of the wet-laid nonwoven fabric have non-uniform pore diameters. On the other hand, when a wet-laid nonwoven fabric containing fine glass and synthetic pulp is u...

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
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/24B01D39/16D01F6/62D01F8/04D01F8/14D06M11/00D06M11/38D21H15/02D04H1/4382D04H1/541
CPCD01F6/62D01F8/04B01D2239/064B01D39/1623D01F8/14D21H27/08D21H15/02D21H13/24Y10T442/609D04H1/55D04H1/4382
Inventor 稻垣健治
Owner TEIJIN FRONTIER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap