CN111218846A - Preparation method of air filter high-temperature-resistant filter element paper - Google Patents

Abstract

The invention discloses air filter high-temperature-resistant filter element paper which is prepared from the following raw materials in parts by weight: 50-55 parts of wood pulp fiber, 30-35 parts of straw pulp fiber, 15-20 parts of polyamide fiber, 2-3 parts of modified nano bamboo charcoal powder, 1-2 parts of modified pyrophyllite powder, 2-3 parts of acrylic emulsion, 1-2 parts of nano titanium dioxide, 0.2-0.3 part of zinc borate, 0.1-0.2 part of chitosan, 1-2 parts of talcum powder, 1-2 parts of fatty alcohol-polyoxyethylene ether sodium sulfate and 0.2-0.4 part of PAE wet strength agent. The filter paper obtained by the invention has the advantages of good water permeability, large filtering area, small maximum aperture, high filtering precision, good water resistance and the like, has stable performance indexes under the working conditions of normal temperature and high temperature, and has better temperature resistance and filtering effect.

Description

Preparation method of air filter high-temperature-resistant filter element paper

Technical Field

The invention relates to the field of automobile filters, in particular to air-filtering high-temperature-resistant filter element paper.

Background

In one system, a porous media is used to remove solid particles from a liquid or gas, called filtration, and the attachment used to accomplish such a mission is called a filter. The filter comprises an air filter, an engine oil filter and a fuel oil filter which are collectively called as three filters.

As an effective filter medium, filter paper has been widely used in various fields. The performance and use of filter paper vary depending on the type of fibers constituting the filter paper, and there are general filter paper used in general, glass fiber filter paper used at high temperatures, and polypropylene filter paper for ultraclean use. The filter paper can be classified into two categories, i.e., impregnated filter paper and non-impregnated filter paper, according to whether the filter paper is impregnated. The impregnated filter paper is divided into cured filter paper and non-cured filter paper.

With the increasing filtration requirements, it is increasingly difficult for any filter paper composed of a single fiber to meet the requirements of use, so that filter paper composed of a combination of multiple fibers is produced. The common fibers used in the production of filter paper include wood fibers, chemical fibers, glass fibers and the like.

Disclosure of Invention

The invention aims to provide air filter high-temperature-resistant filter element paper.

The above purpose is achieved by the following scheme:

the utility model provides an empty high temperature resistant filter core paper that strains which characterized in that: the composition is prepared from the following raw materials in parts by weight: 50-55 parts of wood pulp fiber, 30-35 parts of straw pulp fiber, 15-20 parts of polyamide fiber, 2-3 parts of modified nano bamboo charcoal powder, 1-2 parts of modified pyrophyllite powder, 2-3 parts of acrylic emulsion, 1-2 parts of nano titanium dioxide, 0.2-0.3 part of zinc borate, 0.1-0.2 part of chitosan, 1-2 parts of talcum powder, 1-2 parts of fatty alcohol-polyoxyethylene ether sodium sulfate and 0.2-0.4 part of PAE wet strength agent;

the preparation method of the modified nano bamboo charcoal powder comprises the following steps: placing bamboo charcoal into a mixed solution of sodium carbonate and potassium permanganate, soaking for 5-6 hours, taking out, drying, and grinding into nano powder to obtain the bamboo charcoal powder;

the preparation method of the modified pyrophyllite powder comprises the following steps: putting pyrophyllite into a mixed solution of sodium carbonate and potassium permanganate, soaking for 4-5 hours, taking out, washing with water, calcining for 4-6 hours at 400-450 ℃, grinding into powder, and sieving with a 100-200-mesh sieve to obtain the pyrophyllite.

The air filtering high-temperature-resistant filter element paper is characterized in that: the solid content of the acrylic emulsion is 40-45%.

The air filtering high-temperature-resistant filter element paper is characterized in that: the mixed solution of sodium carbonate and potassium permanganate is obtained by mixing 8-10g/L of sodium carbonate solution and 0.8-1.2g/L of potassium permanganate solution in equal volume.

The air filtering high-temperature-resistant filter element paper is characterized in that: the preparation method comprises the following steps:

(1) uniformly mixing wood pulp fiber, straw pulp fiber and polyamide fiber in parts by weight, putting the mixture into a pulper for pulping to obtain pulp with the solid content of 5-6%, and adding a PAE wet strength agent in parts by weight for continuous pulping to obtain mixed pulp;

(2) adding the rest raw materials into the mixed slurry obtained in the step (1) according to the weight part, and heating to 70-80 ℃;

(3) defibering by a defibering machine, grinding into thick liquid, papermaking according to a conventional papermaking process, forming, squeezing and drying to obtain the paper.

The air filtering high-temperature-resistant filter element paper is characterized in that: and adding water into the pulp obtained after the pulp grinding, and mixing the pulp until the solid content is 2-3%, and then carrying out a paper making process.

The invention has the beneficial effects that: the modified bamboo charcoal powder and the modified pyrophyllite powder adopted as the raw materials of the invention increase the adsorption performance of the filter paper. The filter paper obtained by the invention has the advantages of good water permeability, large filtering area, small maximum pore diameter, high filtering precision, good water resistance and the like, has stable performance indexes under the working conditions of normal temperature and high temperature, and has better temperature resistance and filtering effect, the maximum pore diameter is 50-55 mu m, the average pore diameter is 30-35 mu m, and the air permeability of the finished paper is 80-90L/m²Between S.

Detailed Description

Example 1

An air filtering high-temperature resistant filter element paper is prepared from the following raw materials in parts by weight (kg): 50 parts of wood pulp fiber, 30 parts of straw pulp fiber, 15 parts of polyamide fiber, 2 parts of modified nano bamboo charcoal powder, 1 part of modified pyrophyllite powder, 2 parts of acrylic emulsion with solid content of 45%, 1 part of nano titanium dioxide, 0.3 part of zinc borate, 0.1 part of chitosan, 1 part of talcum powder, 1 part of fatty alcohol-polyoxyethylene ether sodium sulfate and 0.2 part of PAE wet strength agent;

the preparation method of the modified nano bamboo charcoal powder comprises the following steps: placing bamboo charcoal into a mixed solution of sodium carbonate and potassium permanganate, soaking for 5 hours, taking out, drying, and grinding into nanometer powder to obtain the bamboo charcoal powder;

the preparation method of the modified pyrophyllite powder comprises the following steps: putting pyrophyllite into a mixed solution of sodium carbonate and potassium permanganate, soaking for 4 hours, taking out, washing with water, calcining for 4 hours at 400 ℃, grinding into powder, and sieving with a 200-mesh sieve to obtain the pyrophyllite powder;

the mixed solution of sodium carbonate and potassium permanganate is obtained by mixing a 10g/L sodium carbonate solution and a 0.8g/L potassium permanganate solution in equal volume.

The preparation method of the air filtering high-temperature-resistant filter element paper comprises the following steps:

(1) uniformly mixing wood pulp fiber, straw pulp fiber and polyamide fiber in parts by weight, putting the mixture into a pulper for pulping to obtain pulp with the solid content of 5%, and adding a PAE wet strength agent in parts by weight for continuous pulping to obtain mixed pulp;

(2) adding the rest raw materials into the mixed slurry obtained in the step (1) according to the weight part, and heating to 80 ℃;

(3) defibering by a defibering machine, grinding into thick liquid, papermaking according to a conventional papermaking process, forming, squeezing and drying to obtain the paper.

The maximum pore diameter of the embodiment is 50-55 μm, the average pore diameter is 33-35 μm, and the air permeability of the finished paper is 80-90L/m²Between S.

Examples 2,

An air filtering high-temperature resistant filter element paper is prepared from the following raw materials in parts by weight (kg): the wood pulp fiber 55, the straw pulp fiber 35, the polyamide fiber 20, the modified nano bamboo charcoal powder 3, the modified pyrophyllite powder 2, the acrylic emulsion 3 with the solid content of 42%, the nano titanium dioxide 2, the zinc borate 0.2, the chitosan 0.2, the talcum powder 2, the fatty alcohol-polyoxyethylene ether sodium sulfate 2 and the PAE wet strength agent 0.4;

the preparation method of the modified nano bamboo charcoal powder comprises the following steps: placing bamboo charcoal into a mixed solution of sodium carbonate and potassium permanganate, soaking for 6 hours, taking out, drying, and grinding into nanometer powder to obtain the bamboo charcoal powder;

the preparation method of the modified pyrophyllite powder comprises the following steps: putting pyrophyllite into a mixed solution of sodium carbonate and potassium permanganate, soaking for 5 hours, taking out, washing with water, calcining for 4 hours at 450 ℃, grinding into powder, and sieving with a 180-mesh sieve to obtain the pyrophyllite.

The mixed solution of sodium carbonate and potassium permanganate is obtained by mixing 8g/L sodium carbonate solution and 0.8g/L potassium permanganate solution in equal volume.

The preparation method of the air filtering high-temperature-resistant filter element paper comprises the following steps:

(1) uniformly mixing wood pulp fiber, straw pulp fiber and polyamide fiber in parts by weight, putting the mixture into a pulper for pulping for 20min to obtain slurry with the solid content of 6%, and adding a PAE wet strength agent in parts by weight for continuous pulping to obtain mixed slurry;

(2) adding the rest raw materials into the mixed slurry obtained in the step (1) according to the weight part, and heating to 80 ℃;

(3) defibering by a defibering machine, grinding into thick liquid, adding water into the obtained thick liquid for size mixing until the solid content is 3%, then making paper, forming, squeezing and drying to obtain the paper.

In the embodiment, the maximum pore diameter is 53-55 mu m, the average pore diameter is 30-35 mu m, and the air permeability of the finished paper is 80-90L/m²Between S.

Claims (2)

1. A preparation method of air-filtering high-temperature-resistant filter element paper comprises the following steps:

(1) uniformly mixing wood pulp fiber, straw pulp fiber and polyamide fiber in parts by weight, putting the mixture into a pulper for pulping to obtain pulp with the solid content of 5-6%, and adding a PAE wet strength agent in parts by weight for continuous pulping to obtain mixed pulp;

(2) adding the rest raw materials into the mixed slurry obtained in the step (1) according to the weight part, and heating to 70-80 ℃;

(3) defibering by a defibering machine, grinding into thick liquid, papermaking according to a conventional papermaking process, forming, squeezing and drying to obtain the paper.

2. The air-filtering high-temperature-resistant filter element paper as claimed in claim 1, wherein: and adding water into the pulp obtained after the pulp grinding, and mixing the pulp until the solid content is 2-3%, and then carrying out a paper making process.