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A kind of diesel composite filter paper and preparation method thereof

A filter paper and diesel technology, applied in the direction of filter paper, special paper, separation method, etc., can solve the problems of maintaining the mechanical strength of the filter paper, decreasing the strength of the filter paper, and high moisture content of the filter paper, achieving high strength, preventing erosion and decomposition, and good air permeability. Effect

Active Publication Date: 2021-05-14
杭州特种纸业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem that the strength of the filter paper decreases due to the high moisture content of the filter paper in the prior art, and provide a diesel composite filter paper. The diesel composite filter paper has good hydrophobicity and does not absorb moisture, thereby maintaining the mechanical strength of the filter paper. Not prone to breakage under action

Method used

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  • A kind of diesel composite filter paper and preparation method thereof

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Embodiment 1

[0025] Diesel composite filter paper, comprising the first carbon fiber layer, the second carbon fiber layer and the base paper sandwiched between the first carbon fiber layer and the second carbon fiber layer; wherein, the first carbon fiber layer is a polyacrylonitrile-based carbon fiber layer, and the second carbon fiber layer is Viscose-based carbon fiber layer; wherein the preparation method of base paper comprises the following steps: mixing and beating abaca fiber and ramie fiber at a mass ratio of 1:3, controlling the concentration of the slurry to 2wt%, mixing and stirring for 2 hours to obtain the mixed slurry, and mixing the mixed slurry The base paper is obtained by copying the materials on the Internet; wherein, the first carbon fiber layer and the second carbon fiber layer are activated, and the activation treatment method includes the following steps: soaking the first carbon fiber layer or the second carbon fiber layer in a mixture of sulfuric acid and potassium ...

Embodiment 2

[0031]Diesel composite filter paper, comprising a first carbon fiber layer, a second carbon fiber layer and base paper sandwiched between the first carbon fiber layer and the second carbon fiber layer; wherein the first carbon fiber layer is a viscose-based carbon fiber layer, and the second carbon fiber layer is pitch base carbon fiber layer; wherein the preparation method of base paper comprises the following steps: abaca fiber and ramie fiber are mixed and beaten in a mass ratio of 1:2.5, the concentration of the slurry is controlled to be 2wt%, mixed and stirred for 1.5h to obtain the mixed slurry, and the mixed slurry The base paper is obtained by online copying and molding; wherein, the first carbon fiber layer and the second carbon fiber layer are activated, and the activation treatment method includes the following steps: immersing the first carbon fiber layer or the second carbon fiber layer in a mixed aqueous solution of sulfuric acid and potassium permanganate , wher...

Embodiment 3

[0037] Diesel composite filter paper, comprising a first carbon fiber layer, a second carbon fiber layer and base paper sandwiched between the first carbon fiber layer and the second carbon fiber layer; wherein the first carbon fiber layer is a pitch-based carbon fiber layer, and the second carbon fiber layer is polypropylene Nitrile-based carbon fiber layer; wherein the preparation method of base paper comprises the following steps: abaca fiber and ramie fiber are mixed and beaten in a mass ratio of 1:3.5, and the concentration of the slurry is controlled to be 2.5wt%, mixed and stirred for 2h to obtain the mixed slurry, and the mixed slurry The base paper is obtained by copying the materials on the Internet; wherein, the first carbon fiber layer and the second carbon fiber layer are activated, and the activation treatment method includes the following steps: soaking the first carbon fiber layer or the second carbon fiber layer in a mixture of sulfuric acid and potassium perman...

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Abstract

The invention relates to the technical field of filter paper preparation, solves the problem that the strength of the filter paper is lowered due to the high moisture content of the filter paper, and discloses a diesel composite filter paper and a preparation method thereof. The filter paper includes a first carbon fiber layer, a second carbon fiber layer and a base paper sandwiched between the first carbon fiber layer and the second carbon fiber layer; the preparation method is that the base paper is first immersed in an aqueous solution of carboxymethyl chitosan, and then immersed in polyvinyl acetate The cross-linking reaction occurs under the action of ethyl silicate in the solution, and a layer of three-dimensional network cross-linked film is covered on the surface of the base paper. Finally, the composite filter paper intermediate is sandwiched between the activated first carbon fiber layer and the second carbon fiber layer. In between, press rolls with a double-roll hot press to obtain diesel composite filter paper. The three-dimensional cross-linked networked film covered on the surface of the base paper of the present invention has a strong hydrophobic effect, plays a protective role on the base paper, prevents the base paper from absorbing moisture and causes the strength to deteriorate, and the base paper is not easily broken under the action of oil pressure.

Description

technical field [0001] The invention relates to the technical field of filter paper preparation, in particular to a diesel composite filter paper and a preparation method thereof. Background technique [0002] Diesel composite filter paper is a key component in diesel filters, which determines the performance of diesel filters. In recent years, under the guidance of national policies related to energy saving and emission reduction, the diesel engines launched by various engine manufacturers have been able to meet the emission requirements above the National IV. Modern diesel engines have entered the era of electronic control, and diesel engines have stricter control over fuel injection under various working conditions. In order to achieve the above precise control, the fuel supply system needs to have a sufficiently high response speed. At the same time, various devices in the system must have sufficient reliability, especially the fuel supply pump and fuel injector, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/08D21H27/30D21H15/10D21H11/12D21H21/16D21H21/36D21H19/14D21H19/28B32B9/00B32B9/02B32B9/04
CPCB32B5/26B32B2250/20B32B2262/065B32B2262/106B32B2262/14B32B2307/726D21H11/12D21H15/10D21H19/14D21H19/28D21H21/16D21H21/36D21H27/08D21H27/30
Inventor 王建业吴琼华吴安波
Owner 杭州特种纸业有限公司