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Multi-layer filter paper and preparation method thereof

A filter paper, double-layer technology, applied in the field of multi-layer filter paper and its preparation, can solve the problems of clogging pores by adhesive, easy falling off of filter paper, increase manufacturing cost, etc., achieve good dust holding capacity and filtering accuracy, simplify manufacturing process, The effect of reducing manufacturing costs

Active Publication Date: 2019-07-09
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0004] The above-mentioned multi-layer filter paper obtained by various folding physical methods has great flexibility in the multi-layer processing process, but it is difficult to exert its excellent multi-layer filter paper performance during the use of filter paper.
If an adhesive is used to bond the filter paper between the layers, not only the manufacturing cost will be increased, but also the amount of adhesive should be strictly controlled, otherwise it will easily cause the adhesive to block the pores, thereby seriously affecting the filtration performance of the filter paper; However, if no adhesive is used to bond the filter paper, the multi-layer composite filter paper formed by directly stacking the filter paper is easy to fall off during use, and the meaning of multiple layers is lost.

Method used

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  • Multi-layer filter paper and preparation method thereof
  • Multi-layer filter paper and preparation method thereof
  • Multi-layer filter paper and preparation method thereof

Examples

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Embodiment

[0061] Example Preparation of multi-layer filter paper

[0062] 1. Composition and ratio of multi-layer filter paper

[0063] The raw material compositions and proportioning ratios of Examples 1-5 and Comparative Examples 1-4 are shown in Table 1.

[0064] Table 1

[0065]

[0066]

[0067]

[0068] 2. Preparation of multi-layer filter paper

[0069] The preparation method of above-mentioned embodiment 1-4, comparative example 2-3 is as follows:

[0070] 1) Preparation of dense layer slurry

[0071] According to the composition of the dense layer, prepare raw plant fibers and single melting point synthetic fibers, mix with water, and beat to obtain the dense layer slurry;

[0072] 2) Preparation of loose layer slurry

[0073] Prepare the raw materials according to the formula composition of the loose layer, mix with water, and beat to obtain the loose layer slurry;

[0074] 3) on an inclined wire paper machine or a Fourdrinier paper machine with more than two ...

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Abstract

The invention provides multi-layer filter paper and a preparation method thereof. The multi-layer filter paper comprises one tight layer and one loose layer at least, wherein the tight layer has a tightness of 0.1-0.3 g / m<3>, and the tightness of the loose layer is 0.1-0.3 g / m<3>. A wet forming technology is utilized to prepare the multi-layer filter paper, good bonding among layers of the filterpaper is achieved, the manufacturing process is simplified, and the manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of industrial filter paper, and in particular relates to a multilayer filter paper and a preparation method thereof. Background technique [0002] Industrial filter paper is a kind of filter paper that has been impregnated. It is prepared into a filter on the filter production line through partial pressure, wave pressure, wave receiving and curing. It is mainly used in internal combustion engines such as automobiles, ships, and tractors. , to remove impurities in air, oil and fuel, prevent engine parts from wearing out, and prolong their life. The filter materials of the filter include felt, cotton yarn, metal wire and oil bath, etc., which have been basically replaced by resin-impregnated paper filter elements. In addition to physical indicators such as tensile strength and tearing degree of general industrial paper, industrial filter paper also requires good bursting resistance and stiffness. In particul...

Claims

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Application Information

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IPC IPC(8): D21H27/08D21H27/38D21F11/14D21F11/04D21H11/12D21H11/18D21H13/24D21H13/40D21H19/12D21H23/56
CPCD21F11/04D21F11/14D21H11/12D21H11/18D21H13/24D21H13/40D21H19/12D21H23/56D21H27/08D21H27/38
Inventor 胡健龙金梁云唐敏姚运振
Owner SOUTH CHINA UNIV OF TECH
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