Coconut fat film dust collection composite material and its preparation method and application

Abstract

The invention discloses a coconut fat film dust-collecting composite material, and a preparation method and an application thereof. The coconut fat film dust-collecting composite material is formed bycompounding a nonwoven fabric, a coconut fat film composite material, a geotextile, a melt-blown filter cloth and another nonwoven fabric, wherein the coconut fat film composite material is obtainedby the following steps: adding water to coconut oil or its derivative, amino acids, lecithin and pectin, performing mixing, carrying out melt casting to form a film, and compounding the coconut fat film on the hot air nonwoven fabric. The coconut fat film composite material, the geotextile, the melt-blown filter cloth and the nonwoven fabrics are welded and laminated by an ultrasonic machine to obtain the coconut fat film dust-collecting composite material. Protective masks or filter elements produced from the coconut fat film dust-collecting composite material can be used for preventing dustsand various particulate matter.

Description

technical field [0001] The invention relates to a coconut fat film dust-collecting composite material and its preparation method and application, specifically corresponding to GBZ2.1-2007 Occupational Exposure Limits of Hazardous Factors in the Workplace Part 1: Standards for Chemical Hazardous Factors, GB2626-Respiratory Protection Self-priming Filtration Anti-particulate respirator standard, DB52 / T743-2012 metal smelting industry self-priming filter dust mask standard, AQ1114-2014 coal mine self-priming filter dust mask standard, GB / T32610-2016 daily protective mask technical specification standard , DB50 / T869-2018 Dust respirators in dust workplaces are applicable to the technical field of specifications and standards, and are used to protect against dust and various particulate matter. (for ease of application, the present invention uses protective mask as the general designation of corresponding standard product). Background technique [0002] The current GB2626-Respir...

AI Technical Summary

Problems solved by technology

The disadvantages are: high resistance of about 130pa, prone to creep when dust is loaded, poor wear resistance, easy to be broken and broken by metal dust such as silicon dust, quartz dust, aluminum dust or non-metallic inorganic dust with high abrasiveness, The polytetrafluoroethylene membrane is a surface filter. Dust cannot enter the interior of the membrane material during filtration, and it hangs on the surface of the membrane material. The dust holding capacity is small. The dust holding test of grain dust (corn flour) shows: Dust added 4h PTFE membrane mask When the surface dust holding capacity is 52mg / piece, the inhalation resistance reaches 294pa, which exceeds the applicable standard for dust masks in DB50 / T869-2018 dust workplace 350mg / piece, inspiratory resistance not greater than the limit of 220pa

The disadvantages are: it is easy to be "pasted" when receiving oily dust, the resistance rises quickly, the service life is short, and the dust holding capacity is less than 80mg / m 2 , Coal dust holding dust test shows: in the coal dust concentration 50mg / m 3 The inhalation resistance reaches 336pa within 3 hours of exposure to dust, which exceeds the limit value of AQ1114-2014 standard 5.9 for self-priming filter dust masks for coal mines.

The disadvantage is: the electrostatic fiber dust collection rate (filtration efficiency) is low, only about 51%. In addition to the particle size and density, it is also related to the ambient temperature and humidity of the workplace. High temperature increases the charge; high humidity reduces charge. 90% of the dust particles floating in the air are positively or negatively charged. Among them, positively charged The dust particles account for about 40% to 51%; the negatively charged dust particles account for about 37% to 54%; the uncharged dust particles account for about 9%.

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