A manufacturing method for a baffle-free air filter and the filter

Abstract

The invention relates to a manufacturing method for a baffle-free air filter. The method includes S10) heating a hot melt adhesive to melt the adhesive; S20) feeding nitrogen into the hot melt adhesive in a molten state; S30) spraying filter paper with the hot melt adhesive mixed with nitrogen along the length direction of the filter paper to form adhesive lines; and S40) folding the filter paperalong the length direction into a W shape, with adjacent filter paper parts being adhered and fixed through the adhesive lines, and the adhesive lines forming supports between adjacent filter paper parts. The invention also relates to the filter. The nitrogen is fed into the hot melt adhesive so that the adhesive is inflated and expanded and the dosage of the adhesive for forming the adhesive lines in unit length is reduced, thus reducing the dosage of the adhesive and reducing the production cost.

Description

technical field [0001] The invention relates to the field of air filters, in particular to a method for manufacturing an air filter without a clapboard and the filter. Background technique [0002] As industrial clean places have higher requirements on the cleanliness of the air, the role of air clean technology is becoming more and more important. Among the many air purification technologies, air filters are the most widely used and mature. According to the air purification requirements of different indoor environments, filters are usually divided into coarse effect, medium effect and high efficiency. Most of the traditional filters are air filters with partitions, and most of them use double-sided coated paper as the partition to prevent the partition from shrinking under the influence of cold, heat, dryness and humidity, thereby emitting particles. When the change occurs, the paperboard may emit larger particles, which will cause the cleanliness test of the workshop to f...

AI Technical Summary

Problems solved by technology

Most of the traditional filters are air filters with partitions, and most of them use double-sided coated paper as the partition to prevent the partition from shrinking under the influence of cold, heat, dryness and humidity, thereby emitting particles. When changing, this kind of spacer may emit larger particles, which will cause the cleanliness test of the workshop to fail

[0003] At present, various high-efficiency filters without partitions have gradually appeared on the market. Most of the high-efficiency filters without partitions are glued continuously on the filter material. After the filter element is folded, the hot melt glue cools and solidifies to form a support. However, this Due to the limited height of the bulge of the glue line and the limited height of the support formed by the folded filter paper, the ventilation volume of the air duct between the filter papers is small, and the filtration efficiency of the filter is not high. In addition, because the hot melt adhesive is Continuous coating, large amount of glue used, high production cost

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