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Flame-retardant polyester-type air filtering paper and preparation method thereof

A technology of air filter paper and flame retardant polyester, applied in the direction of filter paper, separation method, filtration and separation, etc., to achieve the effects of enhanced bonding, increased specific surface area, and reduced usage

Active Publication Date: 2017-09-22
陕西科达智特新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to reduce the amount of adhesives and flame retardants, reduce production costs, overcome halogen return and moisture absorption, and prepare and produce highly efficient flame-retardant and environmentally friendly air filter paper under the premise of ensuring the mechanical properties and flame-retardant properties of air filter paper, etc. no related research

Method used

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  • Flame-retardant polyester-type air filtering paper and preparation method thereof
  • Flame-retardant polyester-type air filtering paper and preparation method thereof
  • Flame-retardant polyester-type air filtering paper and preparation method thereof

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preparation example Construction

[0031] see figure 1 , a preparation method of flame-retardant polyester air filter paper, comprising the following steps:

[0032] Step 1: Dispersing and dispersing PET fibers with a length of 5-10 mm to prepare slurry suspension A;

[0033] Step 2: Fibrillation treatment of PET pulp with a length of 0.3-1 mm, de-fibrillation and dispersion to obtain a slurry suspension B, the beating degree of the PET pulp is 35-50° SR. Since PET pulp is different from plant fibers, the intermolecular strength mainly depends on physical bonding rather than hydrogen bonding, so the specific surface area of ​​pulp is an important factor affecting the strength, so the pulp fibrillation treatment is used to increase the surface distribution. Silk broomization to increase the specific surface area;

[0034] Step 3: Mix the absolute dry fiber amount in the pulp suspension A prepared in step 1 with the absolute dry fiber amount in the pulp suspension B prepared in step 2 at a mass ratio (30-50): (...

Embodiment 1

[0045] Step 1: Dispersing and dispersing PET fibers with a length of 5-10 mm to prepare slurry suspension A;

[0046] Step 2: Fibrillating PET pulp with a length of 0.3 to 1 mm and dissolving and dispersing to obtain pulp suspension B, the beating degree of PET pulp is 35°SR;

[0047] Step 3: Mix the absolute dry fiber amount in the pulp suspension A prepared in step 1 with the absolute dry fiber amount in the pulp suspension B prepared in step 2 at a mass ratio of 6:11 to obtain a mixed pulp suspension C, And dilute the mass concentration of the mixed slurry suspension C to 0.1% in the mixing tank, and adjust the pH to 5-6, and at the same time use the agitator to stir the different components to fully mix and evenly disperse, the stirring time is 10min, and the stirring speed is controlled at 300rpm;

[0048] Step 4: Send the mixed pulp suspension C prepared in Step 3 to an inclined wire paper machine to make a wet paper. Suction and dehydrate the wet paper so that the moi...

Embodiment 2

[0052] Step 1: Dispersing and dispersing PET fibers with a length of 5-10 mm to prepare slurry suspension A;

[0053] Step 2: Fibrillation and dispersion of PET pulp with a length of 0.3-1 mm to obtain pulp suspension B, with a beating degree of PET pulp of 45°SR;

[0054] Step 3: Mix the absolute dry fiber amount in the pulp suspension A prepared in step 1 with the absolute dry fiber amount in the pulp suspension B prepared in step 2 at a mass ratio of 1:1 to obtain a mixed pulp suspension C, Dilute the mass concentration of the mixed slurry suspension C in the mixing tank to 0.2%, and adjust the pH to 5-6. At the same time, use a stirrer to stir the different components to fully mix and evenly disperse. The stirring time is 15min, and the stirring speed is controlled at 500rpm;

[0055] Step 4: Send the mixed pulp suspension C prepared in Step 3 to an inclined wire paper machine to make a wet paper. Suction and dehydrate the wet paper so that the moisture content is less t...

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Abstract

The invention discloses flame-retardant polyester-type air filtering paper and a preparation method thereof. The preparation method of the flame-retardant polyester-type air filtering paper includes the steps that PET fibers are adopted and a structure similar to plant fibers is built by PET pulp. The average length of the PET fibers is relatively long, the PET fibers can be used as skeleton materials of the paper, the average length of the PET pulp is short, through fibrillation treatment, fine fibers adhering to the surface of the PET pulp serve as padding materials, meanwhile, acrylic resin of mixed steeping liquid serves as adhesive, accordingly, the fine fibers and the PET fibers are interwoven to form a small and compact mesh structure, and filter accuracy is improved. On the other hand, raw filtering paper is soaked in a nitrogen and phosphorus flame-retardant resin composite system, nitrogen and phosphorus flame retardants have synergistic effects, the flame retardance efficiency is high, and meanwhile the acrylic resin is used as a glue solution and forms a flame-retardant protective screen on the paper surface. The addition amount of the flame retardants is reduced, the durable and efficient flame-retardant performance is ensured, not only is the production cost reduced but also the comprehensive property of the paper is improved at the same time.

Description

technical field [0001] The invention belongs to the technical field of air filter paper, and in particular relates to a flame-retardant polyester air filter paper and a preparation method thereof. Background technique [0002] In recent years, air filter paper has been widely used. It is often used to manufacture medical masks, air purifiers and core components of automotive internal combustion engine air filters. Most of the air filters used in automobile internal combustion engines are paper filter elements made of resin-impregnated microporous filter paper, which can filter out dust and sand particles in the air, reduce friction loss on the cylinder body, and ensure Sufficient, clean air enters the cylinder. However, due to reasons such as "hot air backflow" and "cylinder backfire", the air filter is burned, causing frequent accidents of car crashes and deaths. The reason is that during the exhaust process, high-temperature and high-pressure gas enters the intake manif...

Claims

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Application Information

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IPC IPC(8): D21F11/14D21H15/02D21H13/24D21H23/32D21H25/06D21H21/34D21H19/12D21H27/08
CPCD21F11/14D21H13/24D21H15/02D21H19/12D21H21/34D21H23/32D21H25/06D21H27/08
Inventor 张美云马珊珊杨斌宋顺喜
Owner 陕西科达智特新材料有限公司
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