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Production method of hot-rolled non-woven base material and product of production method

A technology of non-woven fabrics and manufacturing methods, applied in the direction of non-woven fabrics, separation methods, layered products, etc., can solve the problems of poor physical properties of strength and burst resistance, and cannot be used in a single layer

Inactive Publication Date: 2013-01-30
ZHEJIANG ZHAOHUI FILTRATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polytetrafluoroethylene (PTFE) membrane has poor physical properties such as strength and burst resistance, and cannot be used as a single layer. It must be combined with a support substrate with a certain strength and stiffness before it can be used as a filter unit. The use of filter materials, and several types of support substrates used on the market mainly include: 1. Filament spunbond materials; 2. Wet-laid non-woven fabrics; 3. Dry-laid spunlace non-woven fabrics

Method used

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  • Production method of hot-rolled non-woven base material and product of production method
  • Production method of hot-rolled non-woven base material and product of production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown in , a method for manufacturing a hot-rolled nonwoven fabric substrate includes the following steps in turn:

[0033] A. Cotton feeding and cotton blending: Put the low-melting point polyester fiber and ordinary polyester fiber in the mass ratio of 1:1.05 on the conveyor belt of the cotton feeding machine;

[0034] B. Cotton opening: the fiber raw material is conveyed by the cotton feeder to the cotton opener, and the fiber raw material is broken up;

[0035] C. Air-laid: form the fiber raw material dispersed in step B into a net;

[0036] D. Laying: The fiber raw materials straightened out in step C are superimposed vertically and horizontally into multiple layers;

[0037] E. Hot rolling: The fiber raw materials superimposed into multiple layers in step D are sent to a hot rolling mill, and the multi-layer fiber raw materials are hot rolled into nonwoven fabrics through the rolls of the hot rolling mill;

[0038] F. Stiffening treatment a...

Embodiment 2

[0042] Such as figure 1 Shown, a kind of manufacturing method of hot-rolled nonwoven fabric base material, comprises the following steps successively:

[0043] A. Cotton feeding and cotton blending: Put the low-melting point polyester fiber and ordinary polyester fiber in the mass ratio of 1:1.35 on the conveyor belt of the cotton feeding machine;

[0044] B. Cotton opening: the fiber raw material is conveyed by the cotton feeder to the cotton opener, and the fiber raw material is broken up;

[0045] C. Air-laid: form the fiber raw material dispersed in step B into a net;

[0046] D. Laying: The fiber raw materials straightened out in step C are superimposed vertically and horizontally into multiple layers;

[0047] E. Hot rolling: The fiber raw materials superimposed into multiple layers in step D are sent to a hot rolling mill, and the multi-layer fiber raw materials are hot rolled into nonwoven fabrics through the rolls of the hot rolling mill;

[0048] F. Stiffening tr...

Embodiment 3

[0052] Such as figure 2 As shown, set the grammage to 80 g / m 2 Unwind the hot-rolled non-woven fabric base material, apply glue on the surface of the hot-rolled non-woven fabric base material layer 3 to form an adhesive layer 2, bond it with polytetrafluoroethylene film (PTFE), pass through a pressing roller, dry, and collect roll to form a film-coated filter material layer 1. The filtration efficiency of the filter material is 99.95% (0.3 μm, 5.3 cm / s), the filtration resistance is 265 pa (5.3 cm / s, 0.3 μm), the material thickness is 0.25 mm, and the stiffness is 700 mg.

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Abstract

The invention discloses a production method of a hot-rolled non-woven base material and a product of the production method of the hot-rolled non-woven base material. The production method of the hot-rolled non-woven base material comprises the following steps of: A, feeding and mixing cotton; B, breaking and opening; C, air laying; D, lapping; E, hot rolling; F, stiffening process and shaping; and G, cooling, inspecting and coiling to obtain the base material, and weighing and entering warehouse. The stiffening process is one or combination of gumming and surface gluing. The gram weight range of the product obtained by the production method of the hot-rolled non-woven base material is 50 to 250g / m<2>, the thickness range is 0.1 to 0.8mm, the air permeability is 500 to 6,000L / m<2>.s, and the longitudinal and transverse stiffness can reach 500mg or more. The hot-rolled non-woven base material has very strong flexibility and excellent air permeability; furthermore, the hot-rolled non-woven base material is low in thickness, therefore, the area of a filter material can be increased, the resistance of a filter unit is reduced, and the clogging capacity of the filter unit is improved; meanwhile, the hot-rolled non-woven base material is excellent in stiffness, therefore, the different folding and forming requirements are met; and the cost of the hot-rolled non-woven base material has a more obvious advantage than that of materials with the same application aim.

Description

technical field [0001] The invention relates to a method for manufacturing a hot-rolled non-woven fabric substrate used for film-coated filter materials and its products. Background technique [0002] In recent years, the filter material of polytetrafluoroethylene (PTFE) porous membrane has attracted attention. Polytetrafluoroethylene membrane (PTFE) composite filter material has very low surface energy, strong self-cleaning ability, and excellent performance. Filtration performance. Therefore, the application in the field of air purification and dust removal is becoming more and more common. However, polytetrafluoroethylene (PTFE) membrane has poor physical properties such as strength and burst resistance, and cannot be used as a single layer. It must be combined with a support substrate with a certain strength and stiffness before it can be used as a filter unit. The main types of support substrates used in the market are: 1. Filament spunbond materials; 2. Wet-laid non-...

Claims

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Application Information

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IPC IPC(8): D04H1/435D04H1/55D04H1/58D04H1/732B32B27/02B32B27/30B01D39/08
Inventor 王银利刘朝军张洁吴佳鸣尤健明
Owner ZHEJIANG ZHAOHUI FILTRATION TECH
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