Preparation technology of glass fiber F9 grade air filtering material

Abstract

The invention discloses a preparation technology of a glass fiber F9 grade air filtering material. The preparation technology comprises the following steps: taking raw materials comprising 30 wt% of 10-12 [mu]m glass fibers, 55 wt% of 5-8 [mu]m glass fibers and 15 wt% of glass wool, adding water with a pH value of 2.6, having a weight 20 times the weight of the raw materials, performing mixing, stirring the obtained mixture to form a slurry, and ensuring that the pH value of the slurry is 2.5; carrying out an existing wet papermaking process on the slurry to prepare a filtering material; allowing the filtering material to sequentially pass through three drying cylinders at a paper feeding speed of 35 m / min to dry the filtering material; and coating two sides of the dried filtering materialwith an acrylic resin solution, and allowing the coated filtering material to sequentially pass through two drying cylinders at a paper feeding speed of 35 m / min to make the water content of the dried filtering material less than 5% in order to obtain the glass filter F9 grade air filtering material. The F9 grade air filtering material product prepared by the method has high efficiency, high moisture resistance, non-deformability and long service life.

Description

technical field [0001] The invention specifically relates to the preparation of an air filter material, in particular to a process for preparing glass fiber F9 grade air filter material with glass fiber as the basic skeleton. Background technique [0002] Smog, common in cities, is the result of the interaction of specific climatic conditions and human activities. The economic and social activities of a high-density population will inevitably emit a large amount of fine particulate matter (PM2.5). Once the emission exceeds the atmospheric circulation capacity and carrying capacity, the concentration of fine particulate matter will continue to accumulate. Widespread smog. Smog will have adverse effects on steel-framed industrial systems. For example, in the engine system, for smog, the ordinary air filter on the intake manifold has no effect at all. Running (as long as the engine is started), the smog particles will unscrupulously flood into the combustion chamber of the en...

AI Technical Summary

Problems solved by technology

[0003] Existing air filters are made of plant fiber air filter materials. In the past 5 years, a large number of problems have been revealed in the investigation of application cases: 1. Plant fibers are hydrophilic substances on the surface and have a hollow structure. In the case of high humidity, the plant fiber absorbs moisture and expands, resulting in a thicker fiber diameter and smaller porosity, resulting in a decrease in air permeability and a significant increase in resistance; 2. The diameter of ordinary plant fibers is generally around 20 μm, and the prepared air filter material Generally at the M5-M6 level, the efficiency is low, and a large amount of dust enters the engine and the after-treatment system, which will cause large-scale engine wear and after-treatment blockage; 3. In the presence of moisture and liquid pollutants, plants The moisture absorption of the fiber not only swells, but also becomes longer, which leads to serious deformation of the filter element and serious internal folding, which seriously affects the service life; 4. Through the analysis of a large number of filter elements with a short service life, liquid pollutants and solid The mixing of pollutants leads to the failure of the filter material is also one of the important reasons

The interaction between the two adheres to the plant fibers like "paste mud", which makes it difficult for dust to be blown back, reducing the number of times that can be blown back and cleaning, and shortening the service life

[0004] Therefore, at present, domestic air filter materials still remain at the level of traditional wood pulp fibers. The product has low filtration efficiency, high resistance, and short service life. Moreover, due to poor communication between upstream and downstream industrial chains and lack of design methods, it is difficult to upgrade products.

At the same time, because foreign air filtration products are designed according to European and American working conditions, they show serious "acclimatization" in the environment of severe smog. Because of their technological blockade, the production process and technology development of domestic advanced products is very slow