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A kind of non-woven filter medium and its preparation method and application

A filter medium and melt spinning technology, applied in the field of two-component non-woven filter medium, can solve the problems of component failure, inability to meet the long-life requirements of the filter material, poor wear resistance, etc., to avoid densification. The loss of performance and air permeability is large, the filter area and the ability to hold dirt and dust are increased, and the effect of avoiding the easy slippage of fibers

Active Publication Date: 2021-11-19
上海精发实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the research and design of relevant filter materials in the coarse and medium-efficiency filtration stages necessary for the fresh air purification process. Materials are mainly used, such as PET, PP, etc. In the actual application of filter components, there are often cases where the overall component fails due to reasons such as small coarse and medium-efficiency filter areas, small dust holding capacity, and wear and tear.
[0003] Secondly, single-component non-woven needle-punched materials often cause the phenomenon of large-particle dust filtration due to the existence of needle holes; and single-component synthetic fiber needle-punched materials are generally used to It is relatively fluffy, and the entanglement and cohesion between short fibers is weak. Although the air permeability is large, the wear resistance is poor, and it cannot meet the market's requirements for long-life filter media.
Furthermore, the common coarse and medium-efficiency filter materials have a relatively simple structure, and the dust-receiving surface of the material is relatively flat, which limits the further improvement of its dust-holding and dirt-holding capacity.

Method used

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  • A kind of non-woven filter medium and its preparation method and application
  • A kind of non-woven filter medium and its preparation method and application
  • A kind of non-woven filter medium and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The polymer of component A is PE masterbatch, with a melting point of 130-135°C; the polymer of component B is PP masterbatch, with a melting point of 162-165°C. Component composite ratio A:B=50%:50%.

[0051] The above two kinds of polymers are olefin polymers and do not need dehydration treatment. The two polymers are melted and extruded through their respective screw extruders.

[0052] The polymer of component A is melted through a single-screw extruder. The filter is filtered, the pressure before filtration is 9.7MPa, and the pressure after filtration is 6.5MPa. Then the melt enters the metering pump for metering. The speed of the metering pump is 29rpm, and the quantitative melt enters the composite spinning box.

[0053] The polymer of component B is melted through a twin-screw extruder, and its temperature zone is set as: 210°C, 220°C, 230°C, 240°C, 240°C, 240°C, 245°C, 245°C, 245°C, 245°C, 240°C, melt temperature 237°C, component B melt is boosted by the boo...

Embodiment 2

[0056] The polymer of component A is PE masterbatch, with a melting point of 130-135°C; the polymer of component B is PP masterbatch, with a melting point of 162-165°C. Component composite ratio A:B=50%:50%.

[0057] The above two kinds of polymers are olefin polymers and do not need dehydration treatment. The two polymers are melted and extruded through their respective screw extruders.

[0058] The polymer of component A is melted through a single-screw extruder. The filter is filtered, the pressure before filtration is 9.7MPa, and the pressure after filtration is 6.5MPa. Then the melt enters the metering pump for metering. The speed of the metering pump is 29rpm, and the quantitative melt enters the composite spinning box.

[0059] The polymer of component B is melted through a twin-screw extruder, and its temperature zone is set as: 210°C, 220°C, 230°C, 240°C, 240°C, 240°C, 245°C, 245°C, 245°C, 245°C, 240°C, melt temperature 237°C, component B melt enters the filter aft...

Embodiment 3

[0062] The polymer of component A is PE masterbatch, with a melting point of 130-135°C; the polymer of component B is PP masterbatch, with a melting point of 162-165°C. Component composite ratio A:B=10%:90%.

[0063] The above two kinds of polymers are olefin polymers and do not need dehydration treatment. The two polymers are melted and extruded through their respective screw extruders.

[0064] The polymer of component A is melted through a single-screw extruder. The filter is filtered, the pressure before filtration is 9.0MPa, and the pressure after filtration is 6.5MPa. Then the melt enters the metering pump for metering. The speed of the metering pump is 30rpm, and the quantitative melt enters the composite spinning box.

[0065] The polymer of component B is melted through a twin-screw extruder, and its temperature zone is set as: 210°C, 220°C, 230°C, 240°C, 240°C, 240°C, 245°C, 245°C, 245°C, 245°C, 240°C, melt temperature 245°C, component B melt is boosted by the boo...

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Abstract

The invention provides a method for preparing a non-woven filter medium, which includes the following steps: 1) Melt spinning: use A component polymer and B component polymer to form a skin-core structure continuous two-component compound after melt spinning Filament; 2) Web forming: the skin-core structure continuous two-component composite filament is divided into a web; 3) Reinforcement forming: hot air fusion bonding is used for consolidation. The above-mentioned preparation method of the present application includes the differential shrinkage technology of the two-component composite filament mesh. By controlling the pre-pressing initial molding and the hot air penetration process, the surface fibers of the non-woven fabric show heat-absorbing differential shrinkage, and the fibers buckle and deform A new type of surface structure is produced, which effectively increases the specific surface area of ​​filtration.

Description

technical field [0001] The invention relates to a non-woven filter medium, in particular to a two-component non-woven filter medium. Background technique [0002] In the field of fresh air purification and air filtration, especially in air-conditioning, HVAC and other industries, hierarchical filtration is mostly used in the existing technology, and when it comes to the design and manufacture of filter materials, the main research direction at home and abroad is high-efficiency and ultra-efficient air. Purification, focusing on composite materials, melt-blown electret, electrospinning and other composite technologies, as well as ultra-fine fibers and their non-woven materials. However, there are few reports on the research and design of relevant filter materials in the coarse and medium-efficiency filtration stages necessary for the fresh air purification process. Materials are mainly used, such as PET, PP, etc. In the actual application of filter components, there are ofte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H3/147D01D5/34B01D39/08
CPCB01D39/083D01D5/34D04H3/147D10B2505/04
Inventor 杨占元陈立东陈连忠徐克勤濮颖军陈致帆吴建军程茂芸孙乐乐高丰和
Owner 上海精发实业有限公司
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