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Puffed inorganic fiber composite filter material, and preparation method thereof

A technology of inorganic fibers and composite filter materials, applied in chemical instruments and methods, separation methods, and dispersed particle filtration, etc., can solve the problems of poor adaptability of filter materials to working conditions and cannot meet the requirements of working conditions, so as to avoid dust accumulation and Effects of clogging, improving physical properties and improving filtration efficiency

Pending Publication Date: 2019-11-01
辽宁新洪源环保材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In some special working conditions with large temperature fluctuations and high corrosiveness, the requirements for environmental protection filter materials are very high. With the increasingly stringent requirements for environmental protection and emission, the filter material of a single material has poor adaptability to working conditions and can no longer meet the working conditions. conditions of use

Method used

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  • Puffed inorganic fiber composite filter material, and preparation method thereof
  • Puffed inorganic fiber composite filter material, and preparation method thereof
  • Puffed inorganic fiber composite filter material, and preparation method thereof

Examples

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preparation example Construction

[0039] The present invention also provides a method for preparing the expanded inorganic fiber composite filter material described in the above technical solution, comprising the following steps:

[0040] a) superimposing the superfine fiber layer, the fine-denier fiber layer, the expanded inorganic fiber base cloth layer and the medium-denier fiber layer, and needle-punching and consolidating between adjacent two layers to obtain a composite needle-punched felt;

[0041] b) The composite needle-punched felt is immersed in a polytetrafluoroethylene solution, taken out, dried, and then sintered to obtain a heat-set composite needle-punched felt;

[0042] c) a polytetrafluoroethylene foam coating is set on the superfine fiber layer of the composite needle-punched felt of the heat-setting process to obtain a coated composite needle-punched felt;

[0043] d) hot-rolling and laminating the expanded polytetrafluoroethylene film layer and the polytetrafluoroethylene foam coating of t...

Embodiment 1

[0057] The expanded inorganic fiber composite filter material provided in this embodiment is as figure 1 As shown, it consists of six layers from the dust facing surface to the clean air surface: expanded PTFE film layer 1, PTFE foam coating 2, superfine fiber layer 3, fine denier fiber layer 4, expanded inorganic Fiber base cloth layer 5, medium denier fiber layer 6. The six-layer structure enlarges the aperture layer by layer from the dust-facing surface to the air-cleaning surface, forming a bell-shaped channel, which effectively avoids the accumulation of internal dust.

[0058] The expanded polytetrafluoroethylene membrane layer 1 has a pore diameter ranging from 0.02 μm to 1.45 μm, and a thickness of 20 μm.

[0059] The pore size range of the polytetrafluoroethylene foam coating 2 is 1.46-1.65 μm, and the thickness is 100 μm.

[0060] The ultra-fine fiber layer 3 is made of ultra-fine PPS short fibers with a fineness of 0.3 dtex after carding and laying; the ultra-fine...

Embodiment 2

[0079] The expanded inorganic fiber composite filter material provided in this embodiment is as figure 1 As shown, it consists of six layers from the dust facing surface to the clean air surface: expanded PTFE film layer 1, PTFE foam coating 2, superfine fiber layer 3, fine denier fiber layer 4, expanded inorganic Fiber base cloth layer 5, medium denier fiber layer 6. The six-layer structure enlarges the aperture layer by layer from the dust-facing surface to the air-cleaning surface, forming a bell-shaped channel, which effectively avoids the accumulation of internal dust.

[0080] The expanded polytetrafluoroethylene membrane layer 1 has a pore diameter ranging from 0.02 μm to 1.45 μm, and a thickness of 10 μm.

[0081] The pore size range of the polytetrafluoroethylene foam coating 2 is 1.46-1.65 μm, and the thickness is 150 μm.

[0082] The ultra-fine fiber layer 3 is made of ultra-fine aramid staple fibers with a fineness of 1.0 dtex after carding and laying; the ultra-...

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Abstract

The invention belongs to the field of industrial environment protection dedusting filter material, and especially relates to a puffed inorganic fiber composite filter material, and a preparation method thereof. According to the puffed inorganic fiber composite filter material, a puffed inorganic fiber base cloth layer is taken as a main structure layer; one side of the puffed inorganic fiber basecloth layer is provided with a middle denier fiber layer, and the other side is provided with a fine denier fiber layer, a superfine fiber layer, a polytetrafluoroethylene intumescent coating layer, and a puffed polytetrafluoroethylene film layer which are contacted successively; the pore diameters of the middle denier fiber layer, the puffed inorganic fiber base cloth layer, the fine denier fiberlayer, the superfine fiber layer, the polytetrafluoroethylene intumescent coating layer, and the puffed polytetrafluoroethylene film layer are reduced gradually layer by layer; the puffed polytetrafluoroethylene film layer is taken as a dust facing surface of the puffed inorganic fiber composite filter material. The filter material is of a multiple material filter layer composite structure, usingrequirements at different working conditions can be satisfied, dust accumulation and blocking of the internal part are not easily caused, and filtering efficiency is high.

Description

technical field [0001] The invention belongs to the field of filter materials for industrial environmental protection dust removal, in particular to an expanded inorganic fiber composite filter material and a preparation method thereof. Background technique [0002] At present, the raw materials used to make industrial environmental protection dust removal filter materials are mainly divided into two categories, one is organic fibers, including polyester, polypropylene, acrylic, PPS, aramid, polysulfone, P84, PTFE, etc.; the other is inorganic Fiber, including glass fiber, basalt fiber, perlite fiber, high silica (modified) fiber, etc. The two types of fibers have their own advantages and disadvantages, and are generally selected in combination with the actual conditions of the working conditions in practical applications. [0003] The processing methods of industrial environmental protection filter materials are mainly divided into two categories: one is woven filter mater...

Claims

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Application Information

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IPC IPC(8): B01D46/00B32B9/00B32B9/04B32B17/02B32B17/12B32B27/02B32B27/04B32B27/32B32B27/28B32B27/34B32B27/12B32B37/24
CPCB01D46/0001B32B5/02B32B5/024B32B5/26B32B5/18B32B5/245B32B27/322B32B27/065B32B5/06B32B37/24B32B2037/243B32B2262/10B32B2262/02B32B2266/025B32B2262/0269B32B2262/101
Inventor 宋明泽李刚
Owner 辽宁新洪源环保材料有限公司
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