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High-performance PTFE (Polytetrafluoroethylene) needled felt filter material and preparation process thereof

A technology of PTFE and preparation process, applied in the fields of filtration and separation, non-woven fabrics, layered products, etc., can solve the problems of affecting the effect of filtration and cleaning, large loss of filter material strength, shortened service life, etc., to reduce dust accumulation and filtration. High precision and good dimensional stability

Active Publication Date: 2013-12-11
辽宁新洪源环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term use of ordinary PTFE needle-punched felt will cause dust accumulation inside the filter material, block the filter material, affect the effect of filtering and dust removal, and increase the system resistance; Large loss of material strength
The above factors will lead to the failure of the filter material and shorten the service life.

Method used

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  • High-performance PTFE (Polytetrafluoroethylene) needled felt filter material and preparation process thereof
  • High-performance PTFE (Polytetrafluoroethylene) needled felt filter material and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] The filter material includes a fine denier PTFE fiber mesh layer 1, a first base fabric layer 2, an upper PTFE fiber mesh layer 3, a second base fabric layer 4, and a lower PTFE fiber mesh layer 5

[0029] Its preparation process is:

[0030] 1. Production of fine denier PTFE fiber mesh layer and first base fabric layer

[0031] It is completed by conventional carding and needle punching process, namely: pretreatment of fine denier PTFE fibers → pre-opening → main opening → uniform mixing → feeding → carding into a web → single-sided web laying → pre-acupuncture → winding →Inspection and other processes.

[0032] (1) Pretreatment: Spread the fine denier PTFE fiber loosely and evenly, spray an aqueous solution containing 1% antistatic agent, and use it after standing for 12 hours; use the surface treatment technology of antistatic agent to improve its bulkiness, so as to facilitate the following process, and at the same time increase the cohesion between fibers after f...

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Abstract

The invention provides a high-performance PTFE (Polytetrafluoroethylene) needled felt filter material and a preparation process thereof. The filter material sequentially comprises a fine denier PTFE fiber mesh layer, a first base fabric layer, an upper PTFE fiber mesh layer, a second base fabric layer and a lower PTFE fiber mesh layer; the fine denier PTFE fiber mesh layer is made by pre-treating, pre-opening and carding a fine denier PTFE fiber, the first base fabric layer and the second base fabric layer are made by pre-treating PTFE base fabrics, and the upper PTFE fiber mesh layer and the lower PTFE fiber mesh layer are made by pre-treating, pre-opening and carding common PTFE fibers. The filter material provided by the invention is stable in structure, high in filter precision and strength, and good in heat resistance and corrosion resistance, and is used for filtering smoke and collecting products under various complex working conditions.

Description

technical field [0001] The invention relates to the field of environment-friendly dust removal filter material, in particular to a high-performance PTFE needle-punched felt filter material with high filtering precision and good filtering performance and a preparation process thereof. Background technique [0002] PTFE needle-punched felt is a filter material with reasonable structure and good performance. It uses PTFE short fibers and base cloth as raw materials, and needles the carded PTFE short fibers through a needle punching machine. The felt-like non-woven fabric filter material is made of PTFE fibers in the middle and felt layers and the reinforced PTFE base cloth, and the fibers are entangled with each other, and the PTFE fiber web is reinforced. It not only has the inherent advantages of PTFE fiber material, but also the felt layer PTFE fiber is a single fiber, with no orientation three-dimensional microporous structure, high porosity, and low resistance to gas filtr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16B32B27/02B32B27/12D04H13/00
Inventor 李刚
Owner 辽宁新洪源环保材料有限公司
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