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A production process and special device for non-woven filter material without base cloth

A special device and production process technology, applied in the direction of filtration and separation, membrane filter, non-woven fabrics, etc., can solve the problem of easy deformation of pre-needle felt without base fabric, and achieve simple production process, short production time and high production efficiency. time-controlled effects

Active Publication Date: 2018-06-15
中国纺织科学研究院江南分院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention designs a special device for opening fibers of pre-needled felt, which effectively solves the technical problem that pre-needled felt without base fabric is easily deformed under small external force, and provides a A kind of production technology of base cloth nonwoven filter material

Method used

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  • A production process and special device for non-woven filter material without base cloth
  • A production process and special device for non-woven filter material without base cloth
  • A production process and special device for non-woven filter material without base cloth

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Example 1: A special device for opening fibers of pre-needled felt

[0038] combine figure 1 , figure 2 As shown, the present invention is a special device for opening fibers of pre-needled felt, comprising a cylinder body 1, the bottom of the cylinder body 1 is connected with a vacuum pump 5, a side door 2 and a feed port 8 are arranged on the cylinder body 1, and the cloth The cage 3 is installed in the cylinder body 1, the cloth cage 3 includes a chassis 32, and the small motor 7 is linked with the chassis 32. A number of small holes 311 are provided, and the cloth clamp 312 is installed on the center pipe 31 of the cloth cage. One end of the centrifugal pump 4 is connected with the central pipe 31 of the cloth cage, and the other end of the centrifugal pump 4 is connected with the driving motor 6 .

[0039] As a preferred embodiment, the cylinder body 1 is provided with a side door 2 on the side wall of the cylinder body 1 to facilitate the operation of feeding a...

Embodiment 2

[0046] Embodiment 2: a kind of production technology of base cloth nonwoven filter material

[0047] A kind of production technology of base cloth nonwoven filter material, it is characterized in that, comprises the following steps:

[0048] (1) Laying: Lay the net after evenly mixing the composite fiber and ordinary PPS fiber in proportion.

[0049] The composition ratio of the composite fiber and the mixing ratio of the composite fiber and common PPS fiber laying were changed, as shown in Example 2-1 to Example 2-6 of Table 1.

[0050] Table 1: Selection and ratio of different composite fibers

[0051]

[0052] Note: The composite fiber in Example 2-1~Example 2-3 is the sea-island type PPS / PET composite fiber; Example 2-4~

[0053] The composite fiber in embodiment 2-6 is split type PPS / PET composite fiber;

[0054] (2) Pre-acupuncture: Pre-needle the fibers laid out in step (1) into pre-needle felt without base fabric, and the needle density is: 100 needles / ㎝ 2 ;

...

Embodiment 3-1～ Embodiment 3-4

[0074] Technology is the same as embodiment 2, and difference is: change the process parameter of step (3) fiber opening, and statistics, analyze its performance impact on non-woven filter material without base cloth, specifically as follows:

[0075] (1) Laying net:

[0076] Evenly mix 70 / 30 island-in-the-sea composite fiber PPS / PET and ordinary PPS fiber in the ratio of 80 / 20, then lay the net, and lay it into a certain thickness according to actual needs;

[0077] (2) Pre-acupuncture: acupuncture density: 150 needles / ㎝ 2 .

[0078] (3) Fiber opening:

[0079] Open the side door 2 of the special device for fiber opening of the pre-needled felt, clamp the head of the non-base cloth pre-needled felt on the cloth cage central tube 31, and use the small motor 7 to make the cloth cage central tube 31 rotate at a certain speed, and evenly The non-base cloth pre-needle felt is wound onto the cloth cage central tube 31;

[0080] After closing the side door 2, add some caustic so...

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Abstract

The invention discloses a production process of a non-base-cloth non-woven filter material and a special device thereof. The production process is characterized by including the steps of lapping, pre-needling, splitting and spunlace. The special device for splitting pre-needled felt is designed. The technical problem that non-base-cloth pre-needled felt is prone to deformation under small external force is effectively solved through the device, by optimizing the splitting and spunlace process, the prepared non-base-cloth non-woven filter material meets the performance index requirements for warp and weft strong force of the filter material in the national standard, the emission concentration and total filter efficiency both meet the national standard requirement, dimensional stability is better, the procedures of the production process are simpler, production time is shorter and controllable, and industrial large-scale production is facilitated.

Description

Technical field: [0001] The invention relates to a non-woven filter material, in particular to a method for producing a base-cloth-free non-woven filter material for filtering fine particle dust with a particle size below 2.5 microns and a special device thereof. Background technique: [0002] Nonwoven filter materials have been widely used in the air filtration industry due to their short processing process and low cost. At present, non-woven filter materials generally use needle-punched fiber felt, spunlace fiber felt and spunbond felt. However, the pore size of the filter material made of conventional fibers is still relatively large compared with those fine particles, and the dust particles are still easy to enter the filter material, which shortens the injection cycle of the filter material and increases the air permeability of the filter material for a long time. Performance and filtration efficiency are also reduced. Therefore, it is difficult for conventional fiber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4382D04H1/49B01D39/16
CPCB01D39/1623B01D2239/0216B01D2239/0233D04H1/4382D04H1/49
Inventor 方虹天李淑莉庞明军
Owner 中国纺织科学研究院江南分院
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