Flame-retardant cured filter paper and preparation method thereof

A filter paper, heating and curing technology, applied in chemical instruments and methods, filter paper, separation methods, etc., can solve the problems of general flame resistance and temperature resistance, and the flame retardant performance of filter paper needs to be improved, and achieve high dimensional stability, high strength, The effect of high filtering precision

Active Publication Date: 2019-04-12
杭州特种纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the flame retardant effect only comes from the flame retardant layer, the flame resistance and temperature resistance of the primary filter layer and the fine filter layer are average, so the overall flame retardant performance of filter paper still needs to be improved.

Method used

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  • Flame-retardant cured filter paper and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] A flame-retardant solidified filter paper, which is made by soaking the base paper body in the dipping solution, taking it out and heating and solidifying it, wherein:

[0034] The base paper body consists of the following components: 100g of composite wood pulp, 12g of polyetherimide powder, 4g of polyethyleneimine, 2g of melamine resin, 2g of compatibilizer, 4g of succinimide ashless dispersant, 2g of butanol, The compatibilizer is a mixture of ethyl methacrylate and pyridine in a mass ratio of 1:0.3;

[0035] The composite wood pulp is made by the following process: mix mercerized wood pulp and coniferous wood pulp in a mass ratio of 3:1 to obtain a mixed pulp, the concentration of wood pulp is 52.8wt%, add aluminum sulfate solution and aluminum stearate to dissolve and mix evenly, The quality of aluminum sulfate is 12wt% of the mixed slurry quality, adjust the pH value of slurry to 5 with sulfuric acid, then be heated to 75 ℃, slowly add calcium hydroxide emulsion u...

Embodiment 2

[0043] A flame-retardant solidified filter paper, which is made by soaking the base paper body in the dipping solution, taking it out and heating and solidifying it, wherein:

[0044] The base paper body consists of the following components: 120g of composite wood pulp, 16g of polyetherimide powder, 5g of polyethyleneimine, 4g of melamine resin, 4g of compatibilizer, 5g of succinimide ashless dispersant, 5g of butanol, The compatibilizer is a mixture of ethyl methacrylate and pyridine in a mass ratio of 1:0.2;

[0045] The composite wood pulp is made by the following process: mercerized wood pulp and coniferous wood pulp are mixed in a mass ratio of 4:1 to obtain a mixed pulp, the wood pulp concentration is 57wt%, aluminum sulfate solution and aluminum stearate are added to dissolve and mix evenly, sulfuric acid The quality of aluminum is 14wt% of the mass of the mixed slurry, adjust the pH value of the slurry to 4 with sulfuric acid, then heat to 78°C, slowly add calcium hydr...

Embodiment 3

[0053] A flame-retardant solidified filter paper, which is made by soaking the base paper body in the dipping solution, taking it out and heating and solidifying it, wherein:

[0054] The base paper body consists of the following components: composite wood pulp 110g, polyetherimide powder 20g, polyethyleneimine 3g, melamine resin 3g, compatibilizer 5g, succinimide ashless dispersant 6g, octanol 3g, The compatibilizer is a mixture of ethyl methacrylate and pyridine in a mass ratio of 1:0.27;

[0055] Composite wood pulp is made by the following process: mercerized wood pulp and coniferous wood pulp are mixed in a mass ratio of 5:1 to obtain a mixed pulp, the wood pulp concentration is 61.5wt%, aluminum sulfate solution and aluminum stearate are added to dissolve and mix evenly, The quality of aluminum sulfate is 16wt% of the mixed slurry quality, adjust the pH value of slurry to 3 with sulfuric acid, then be heated to 80 ℃, slowly add calcium hydroxide emulsion under 80r / min st...

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Abstract

The invention relates to the technical field of cured filter paper. In order to improve flame retardancy of filter paper and meet application requirements of the filter paper on an engine, the invention provides flame-retardant cured filter paper and a preparation method thereof. The flame-retardant cured filter paper is prepared by the following steps: dipping a raw paper body in a dipping liquid, then taking out the raw paper body, and then carrying out heating and curing, wherein the raw paper body is prepared from composite wood pulp, polyetherimide powder, polyethyleneimine, melamine resin, a compatibilizer, a succinimide ashless dispersant and a defoaming agent, and the dipping liquid is prepared from thermosetting phenolic resin, a polymer of cyclohexanedimethanol terephthalic acid(PCTA), a cross-linking agent, a flame retardant, a styrene-acrylic emulsion, methanol, isopropyl acetate and an organic sodium silanolate. The flame-retardant cured filter paper disclosed by the invention is high in flame retardancy and is resistant to high temperature, high-temperature dimension stability is high, strength and filtering precision of the filter paper are high, the preparation method has few steps and concise processes and is easier to operate, and the obtained cured filter paper is suitable for being used as a filter element of an air filter of an engine.

Description

technical field [0001] The invention relates to the technical field of solidified filter paper, in particular to a flame-retardant solidified filter paper and a preparation method thereof. Background technique [0002] The air filter is located in the intake system of the engine and is installed in front of the carburetor or intake pipe to filter out dust and sand particles in the air and ensure sufficient and clean air entering the cylinder. Commonly used air filters include inertial oil bath air filters, paper dry air filters, polyurethane filter air filters, etc. Among them, the filter element of the paper dry air filter is made of microporous filter paper treated with adhesive, the adhesive forms the solidified layer of the filter element, and the microporous filter paper is mainly made of plant fiber slurry, which has high filtration efficiency. , simple structure, light weight, low cost and other advantages, it is currently the most widely used automotive air filter. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/08D21F11/14D21H11/04D21H17/54D21H17/56D21H17/51D21H17/66D21H19/14D21H19/24D21H21/34D21H21/14D21H25/06
CPCD21F11/14D21H11/04D21H17/51D21H17/54D21H17/56D21H17/66D21H19/14D21H19/24D21H21/14D21H21/34D21H25/06D21H27/08
Inventor 王建业吴琼华吴安波
Owner 杭州特种纸业有限公司
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