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Low-density filter paper

A filter paper, low-density technology, applied in the direction of filter paper, filter separation, papermaking, etc., can solve the problems of low filtration efficiency and slow filtration speed

Inactive Publication Date: 2017-10-31
TAICANG PAIOU TECH CONSULTING SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the filter material is natural fiber, the resistance is large, resulting in slow filtration speed and low filtration efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A low-density filter paper, characterized in that the low-density filter paper is composed of hollow glass fibers with an average fiber diameter of 3 μm and a phenolic resin adhesive with a viscosity of 800 mPa·s.

[0013] The hollowness of the hollow glass fiber is 0.4, and the hollow rate is 80%.

[0014] The aspect ratio of the hollow glass fiber is 20.

[0015] The adhesive is prepared by mixing 50 parts of phenol and 90 parts of formaldehyde with 5 parts of catalyst, adding 10 parts of melamine, 40 parts of urea and 120 parts of deionized water at 65° C. for 0.4 h.

Embodiment 2

[0017] A low-density filter paper, characterized in that the low-density filter paper is composed of hollow glass fibers with an average fiber diameter of 6 μm and a phenolic resin adhesive with a viscosity of 3400 mPa·s.

[0018] The hollowness of the hollow glass fiber is 0.7, and the hollow rate is 100%.

[0019] The aspect ratio of the hollow glass fiber is 70.

[0020] The adhesive is prepared by mixing 70 parts of phenol, 130 parts of formaldehyde, 10 parts of catalyst, 15 parts of melamine, 70 parts of urea and 170 parts of deionized water at 90° C. for 2.5 hours.

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PUM

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Abstract

The invention relates to low-density filter paper. The low-density filter paper contains hollow glass fibers and a phenolic resin adhesive, wherein the average fiber diameter of the hollow glass fibers is 3-6 microns, and the viscosity of the phenolic resin adhesive is 800mPa.s-3400mPa.s; and the hollow degree of the hollow glass fibers is 0.4-0.7, the hollow ratio is 80%-100%, and the length-diameter rate is 20-40. By adding the hollow glass fibers, the specific surface area of a filter material of the same volume is increased, the filter efficiency is improved, and meanwhile, the unit weight is not increased, so that the purposes of lightness and high efficiency are achieved, the density of filter paper is reduced, the filter resistance is reduced, and the filter efficiency is improved. Meanwhile, the adopted phenolic resin adhesive is modified through melamine and urea, so that the impact toughness and cohesive property of phenolic resin are improved, and meanwhile, the fluidity of the resin is improved; and by adding urea, free formaldehyde in the resin can be absorbed, so that the pollution is effectively reduced.

Description

technical field [0001] The invention relates to a filter paper, in particular to a low-density filter paper, which belongs to the field of filter materials. Background technique [0002] As an effective filter medium, filter paper has been widely used in various fields. According to the different types of fibers that make up the filter paper, the performance and use of the filter paper are also different. There are ordinary filter paper for general occasions and glass fiber filter paper for high temperature. The fiber diameter of glass fiber is very small, the minimum can reach 0.5μm, which can be used to make ultra-precision filter paper, and compared with the whole wood fiber filter paper with the same pore size, it has the advantages of small resistance and high temperature resistance. For glass fiber filter paper, its mechanical properties, heat resistance and corrosion resistance are excellent, and it is widely used in aviation, aerospace, electronics, machinery, chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/08D21H13/40D21H21/16
CPCD21H27/08D21H13/40D21H21/16
Inventor 陈照峰鲍舒婷吴操李斌斌王蕾叶信立
Owner TAICANG PAIOU TECH CONSULTING SERVICE