Diesel oil 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 filter paper strength decrease, non-hygroscopic, maintain filter paper mechanical strength, etc., and achieve the effect of good hydrophobic performance

Active Publication Date: 2019-04-12
杭州特种纸业有限公司
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  • 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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  • Diesel oil 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 filter paper has a high moisture content and causes the strength of the filter paper to decrease, anddiscloses diesel oil composite filter paper and a preparation method thereof. The filter paper comprises a first carbon fiber layer, a second carbon fiber layer, and base paper interposed between thefirst carbon fiber layer and the second carbon fiber layer. The preparation method comprises the following steps: dipping the base paper into an aqueous solution of carboxymethyl chitosan, then immersing the dipped base paper in a polyvinyl acetate solution to undergo a cross-linking reaction under the action of ethyl silicate, so as to cover the surface of the treated base paper with a three-dimensional net-like cross-linked film, finally sandwiching the obtained composite filter paper middle body between an first carbon fiber layer and second carbon fiber layer subjected to activation treatment, and conducting press rolling by a two-roll hot press, so as to obtain the diesel oil composite filter paper. The three-dimensional net-like cross-linked film covering the surface of the base paper has a strong hydrophobic effect, plays a protective role on the base paper, prevents the base paper from absorbing moisture and causing deterioration of strength, and enables the base paper to be less prone to cracking 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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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