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Method for producing needled and spunlaced composite nonwovens for filter materials

A technology of filter materials and non-woven fabrics, which is applied in the direction of non-woven fabrics, textiles, papermaking, and layered products, and can solve the problems of large investment and high requirements for operators

Inactive Publication Date: 2010-12-08
XIAMEN ZHONGCHUANG ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the spunlace consolidation method also has its shortcomings, such as large initial investment in equipment, a separate water treatment system, and high requirements for operators.

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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  • Method for producing needled and spunlaced composite nonwovens for filter materials
  • Method for producing needled and spunlaced composite nonwovens for filter materials
  • Method for producing needled and spunlaced composite nonwovens for filter materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The PPS fibers with a fineness of 1.6D and a length of 51mm are formed into upper and lower layers of fiber webs simultaneously with two sets of carding process equipment, and are sent to a single-lane pre-acupuncture machine with the PPS base cloth 3, and the acupuncture density is 240 stitches / cm 2 ; Form a plain felt with a certain strength and density, and then send the plain felt to three high-speed fine water streams with a maximum pressure of 400 bar (Bar) for spraying, so that the fibers are entangled and reinforced, and dried at a temperature of 100 ° C. According to the needs of use, the needle felt is subjected to one or more finishing treatments such as heat setting, singeing and calendering, and chemical treatment, and finally forms a finished product after inspection.

Embodiment 2

[0031] PPS fibers with a fineness of 1.6D and a length of 65mm and PPS fibers with a denier of 2.0 are formed into upper and lower layers of fiber webs at the same time using two sets of carding process equipment, and are sent into single-pass pre-needling with PPS base fabric 3 machine, the needling density is 200 needles / cm 2 ; Form a plain felt with a certain strength and density, and then send the plain felt to 6 high-speed fine water streams with a maximum pressure of 400 bar (Bar) for spraying, so that the fibers are entangled and reinforced, and dried at a temperature of 250 ° C. According to the needs of use, the needle felt is subjected to one or more finishing treatments such as heat setting, singeing and calendering, and chemical treatment, and finally forms a finished product after inspection.

Embodiment 3

[0033] PPS fibers with a fineness of 1.6D and a length of 76mm and PPS fibers with a denier of 2.0 are carded into a web using two sets of process equipment to simultaneously form upper and lower layers of fiber webs and send them to a single-lane pre-needling machine. The needling density is 300 stitches / cm 2 ;Form a plain felt with a certain strength and density, and then send the plain felt to 9 high-speed fine water streams with a maximum pressure of 400 bar for spraying, so that the fibers are entangled and reinforced, and dried at a temperature of 200°C. Then the needle-punched felt is subjected to one or more finishing treatments such as heat setting, singeing and calendering, and chemical treatment, and finally forms a finished product after inspection.

[0034] Please refer again Figure 2 to Figure 5 Shown is the structural representation of different finished products made by the present invention, figure 2 In the structure shown, the dust-facing surface 1 is a l...

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Abstract

The invention discloses a method for producing needled and spunlaced composite nonwovens for filter materials. The method comprises the following steps of: (1) respectively opening, mixing, carding and lapping two same or different fibers to form fiber webs, and superposing the fiber webs; (2) pre-needling the two superposed fiber webs to form a pastel felt, and controlling the needling density to between 200 and 300 needles / cm<2>; (3) spunlacing the pastel felt in a high-speed superfine water flow, controlling the initial water pressure of the high-speed superfine water flow to be 20 bars, and controlling the subsequent water pressure to be more than or equal to 20 bars and less than or equal to 400 bars; and (4) drying at the temperature of between 100 and 250 DEG C. The nonwovens produced by the production method have the characteristics of small pores, high porosity, high strength, smooth surfaces, softness and the like and have the properties of easy ash removal, stability and low resistance in running, high filter efficiency, high filter precision and the like in use.

Description

technical field [0001] The invention belongs to the technical field of manufacturing high-performance non-woven filter materials, and in particular relates to a production method of needle-punched and spunlace composite non-woven fabrics for high-performance filter materials. A method for producing high-performance filter materials. The material uses high-performance fibers (including chemical fibers and inorganic fibers) as raw materials, and combines single-pass needle punching and multi-pass punching to produce high-performance filter materials. This material can be widely used Used in various dust purification and liquid filtration. Background technique [0002] With the continuous enhancement of environmental protection awareness and requirements worldwide and the continuous advancement of science and technology, researchers are unremittingly researching and utilizing all possible materials and methods to develop new and more effective filter materials to improve the pe...

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): D04H1/46B32B5/08B32B5/26D04H1/498
Inventor 罗祥波罗章生丘国强蔡伟龙
Owner XIAMEN ZHONGCHUANG ENVIRONMENTAL TECH CO LTD
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