A composite filter for smoke detection and its preparation method and application

A technology of smoke detection and filter, which is applied in the field of composite filter for smoke detection and its preparation, to achieve the effect of ensuring filtration efficiency

Active Publication Date: 2022-03-25
CHINA NAT PULP & PAPER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after analysis, there is a serious mutual restrictive relationship between the indicators of moisture absorption, filtration efficiency and filtration resistance. Improving the moisture absorption and filtration efficiency will increase the filtration resistance, so the relationship between these indicators is reached. Balance is a huge hurdle to overcome in the field

Method used

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  • A composite filter for smoke detection and its preparation method and application
  • A composite filter for smoke detection and its preparation method and application

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preparation example Construction

[0031] The present invention provides a method for preparing a composite filter for flue gas detection described in the above technical solution, comprising the following steps:

[0032] Mix the glass fiber and water, and carry out defrosting treatment to obtain the glass fiber slurry;

[0033] Mixing the glass fiber slurry, the first latex, the first reinforcement additive and the first defoamer to obtain a glass fiber mixed slurry;

[0034] Mixing the synthetic fiber and water, and performing a deflaking treatment, to obtain a synthetic fiber slurry;

[0035] Mixing the synthetic fiber slurry, the second dispersant and the second defoamer to obtain a synthetic fiber mixed slurry;

[0036] The glass fiber mixed slurry and the synthetic fiber mixed slurry are made to obtain a composite filter for smoke detection.

[0037] The invention mixes the glass fiber and water, and carries out defrosting treatment to obtain the glass fiber slurry. In the present invention, the compos...

Embodiment 1

[0049] (1) Glass fiber layer: quantitative 100g / m 2 . Mix 25 parts by weight of chopped glass fiber (15.0 μm in diameter and 3 mm in length) and 75 parts by weight of glass fiber cotton (34 ° SR) with water to obtain glass fiber slurry with a concentration of 2 wt %; The polyamide epichlorohydrin resin (calculated by dry weight) of 0.3 parts by weight is prepared as an aqueous solution of reinforcing agent, and the model of 0.07 parts by weight is the organosilicon defoamer (calculated by dry weight) of JF-05B. Foaming agent aqueous solution; 1 weight part of styrene-acrylic latex (calculated on a dry basis, purchased from Beijing Dongfang Chemical Factory) is formulated into latex aqueous solution; 0.5 weight part of polyethylene oxide is mixed with water to obtain dispersant aqueous solution;

[0050] After mixing the glass fiber slurry, reinforcing agent aqueous solution, defoamer aqueous solution, dispersant aqueous solution and latex aqueous solution, a glass fiber mixed...

Embodiment 2

[0055] (1) Glass fiber layer: quantitative 120g / m 2 . Mix 45 parts by weight of chopped glass fibers (15.0 μm in diameter, 3 mm in length) and 55 parts by weight of glass fiber cotton (44 ° SR) with water to obtain glass fiber slurry with a concentration of 2 wt %; The polyamide epichlorohydrin resin (calculated by absolute weight) of parts by weight is formulated as reinforcing agent aqueous solution, and the model of 0.07 parts by weight is the organosilicon defoamer (calculated by dry weight) of JF-05B Foaming agent aqueous solution; The styrene-butadiene latex of 1.5% weight portion (according to absolute dry weight, purchased from Dow Chemical) is formulated into latex aqueous solution;

[0056] After mixing the glass fiber slurry, reinforcing agent aqueous solution, defoamer aqueous solution and latex aqueous solution, a glass fiber mixed slurry with a mass concentration of 0.1% is obtained.

[0057] (2) Synthetic fiber layer: quantitative 300g / m 2 . 90 parts by weig...

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Abstract

The invention provides a composite filter for smoke detection, a preparation method and application thereof, and relates to the technical field of detection materials. The composite filter for smoke detection provided by the present invention comprises a glass fiber layer and a synthetic fiber layer which are sequentially stacked. In the present invention, the glass fiber layer can ensure the filtering accuracy of the composite filter sheet, and the synthetic fiber layer can effectively intercept and absorb the water vapor in the flue gas, and at the same time, the air permeability will not be greatly affected. The present invention adopts the double-layer composite filter sheet to ensure the basic characteristics of the filter sheet, such as filtration efficiency, filtration resistance and strength.

Description

technical field [0001] The invention relates to the technical field of detection materials, in particular to a composite filter for smoke detection and its preparation method and application. Background technique [0002] Smoking and health are major issues worldwide. Studies have found that there are more than 5,000 chemical components in cigarette smoke, among which seven chemical components are more harmful to the human body and cause many diseases. In response to this problem, people have been working hard to explore technologies to reduce the harm of cigarettes, but the premise is a relatively accurate analysis of the main harmful chemical components of the smoke. Through the analysis of smoke components, characteristics of smoke aerosol particles, puff capacity, puff frequency, puff duration, etc., the tobacco industry has designed a smoking machine (ISO3308) to simulate the smoking process, and then control the mainstream smoke. Gas is tested. The key medium used b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/14B01D39/20B01D39/16B01D46/10B32B17/02B32B17/12B32B27/02B32B27/32B32B27/12B32B27/36B32B27/34B32B9/00B32B9/04B32B33/00G01N1/34
CPCB01D39/14B01D39/2017B01D39/1623B01D46/10B32B5/02B32B5/08B32B5/26B32B33/00G01N1/34B01D2258/0283B32B2262/101B32B2250/20B32B2262/0253B32B2262/14B32B2262/0284B32B2262/0261B32B2307/724
Inventor 万莹李政扬扬白媛媛刘文杜齐朝鲁门刘群华
Owner CHINA NAT PULP & PAPER RES INST CO LTD
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