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Nonwoven fabric for liquid filtration, production method and application thereof

A technology of non-woven fabrics and production methods, applied in the direction of filtration and separation, separation methods, chemical instruments and methods, etc., can solve the problems of complex processing technology and rising cost of final products, and achieve high filtration accuracy, high longitudinal strength and simple process Effect

Inactive Publication Date: 2015-01-14
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another example is that Chinese patent CN101618289A discloses an industrial filter cloth for liquid filtration. The filter material of this invention is composed of upper and lower layers of non-woven fabric layers and an intermediate fabric layer. If it is used in the field of liquid filtration,

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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  • Nonwoven fabric for liquid filtration, production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Open 50% by weight of polyphenylene sulfide staple fibers with a fineness of 1.0dtex, and then card on a carding machine equipped with a pair of random rollers. The speed ratio of the random rollers is 0.5:1, and then perform web laying and pre-needling , to obtain polyphenylene sulfide fiber web 1, and then 50% by weight of fineness is the polyphenylene sulfide staple fiber of 2.2dtex to open, and then carding is carried out on a carding machine provided with a pair of random rollers, and the speed ratio of random rollers is 0.5:1, and then laying nets, pre-acupuncture, obtained polyphenylene sulfide fiber web 2, the polyphenylene sulfide fiber web 1 and polyphenylene sulfide fiber web 2 at a total acupuncture density of 1200 needles / cm 2 Composite main needling at the bottom, followed by heat setting (temperature 220°C, speed 7m / min, setting time 4min), singeing (height 3cm, speed 25m / min) and calendering on one side of the polyphenylene sulfide fiber web (The tempera...

Embodiment 2

[0033] 50% by weight of polyphenylene sulfide staple fibers with a fineness of 1.0dtex and 50% by weight of polyphenylene sulfide staple fibers with a fineness of 2.2dtex are mixed, opened, and then carded on a carding machine provided with a pair of random rollers , the speed ratio of the messy roller is 0.6:1, and then lay the net, pre-acupuncture, and then the needling density is 1200 needles / cm 2 The main needling was carried out under the following conditions to obtain the polyphenylene sulfide fiber web 1, and then the polyphenylene sulfide fiber web 1 was subjected to heat setting (temperature 220 ° C, speed 7 m / min, setting time 4 min), singeing (height 3 cm, Speed ​​25m / min) and calendering (singeing surface temperature normal temperature, non-singeing surface 185°C, pressure 4Mpa, speed 25m / min) processing, and finally the nonwoven fabric for liquid filtration of the present invention is obtained. The characteristics of this nonwoven fabric were evaluated and are sho...

Embodiment 3

[0035] 100% by weight of polyphenylene sulfide staple fibers with a fineness of 2.2dtex are opened, and then carded on a carding machine equipped with a pair of random rollers. The speed ratio of the random rollers is 0.5:1, and then laying and pre-needling Puncture, and then at a needle density of 1200 needles / cm 2 The main needling was carried out under the following conditions to obtain the polyphenylene sulfide fiber web 1, and then the polyphenylene sulfide fiber web 1 was subjected to heat setting (temperature 220 ° C, speed 7 m / min, setting time 4 min), singeing (height 3 cm, Speed ​​25m / min) and calendering (singeing surface temperature normal temperature, non-singeing surface 185°C, pressure 4Mpa, speed 25m / min) processing, and finally the nonwoven fabric for liquid filtration of the present invention is obtained. The characteristics of this nonwoven fabric were evaluated and are shown in Table 1.

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Abstract

The invention discloses a nonwoven fabric for liquid filtration, a production method and application thereof. The nonwoven fabric contains at least more than 50wt% of polyphenylene sulfide fiber with denier of less than 3.0dtex. The longitudinal strength of the nonwoven fabric is over 1000N/5cm, and the ratio of the longitudinal strength to the transverse strength of the nonwoven fabric is 0.6-1.0. The nonwoven fabric for liquid filtration provided by the invention not only has the characteristics of high filtration accuracy and high longitudinal strength, but also has the characteristics of simple process and low cost, and can be applied to preparation of filter bags.

Description

technical field [0001] The invention relates to a nonwoven fabric for liquid filtration, its production method and application. Background technique [0002] At present, non-woven filter bags are widely used in the field of liquid filtration. Under normal circumstances, the fiber materials that make up the liquid filter bag are mainly polypropylene, nylon, polyester, etc.; in special environments such as high temperature, strong acid and alkali, and organic solvents, fibers such as polyphenylene sulfide and polytetrafluoroethylene are used. The material is the main one. [0003] Generally, in order to improve the mechanical properties and stability of the filter material, the structure of the high-temperature dust removal filter material is composed of two upper and lower layers of non-woven fabric layers and a middle fabric layer. The material has a short service life and frequent replacement, while the increase in the middle fabric layer makes the product process more co...

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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IPC IPC(8): B01D39/14B01D39/16
Inventor 鲍稳张尤娟
Owner TORAY FIBER RES INST(CHINA) CO LTD