Spunlace non-woven fabric composite filter material and manufacturing method thereof

Abstract

The invention discloses a spunlace non-woven fabric composite filter material and a manufacturing method thereof. The manufacturing method of the composite filter material comprises the following steps that: spunlace non-woven fabric which is obtained after the starching treatment is unwound, the surface of the spunlace non-woven fabric is coated, the coat is of oil-based polyurethane with the solid content of 30 to 75 percent, polyfluortetraethylene film is smoothed by a hot ironing roller after being unwound, the spunlace non-woven fabric and the polyfluortetraethylene film are compounded through the compression of pressing rolls, the pressure of the pressing roll is 3 to 10 kg, at the same time the composite material is heated and dried, the drying temperature is 70 to 170 DEG C, and the composite material is rolled to form the finished product after the compounding. Finally the filter material which is formed by compounding the spunlace non-woven fabric and the polyfluortetraethylene film is obtained, the base weight of the composite product is 102 to 258 g / m2, the filter resistant force is 40 to 280 Pa, the filter efficiency is 85 to 99.995 percent, and the stiffness is 1500 to 4500 mg. The filter material has low filter resistant force and high filter efficiency, is easy to fold and for, and can be made into different filters with different shapes.

Description

technical field [0001] The invention relates to a nonwoven fabric, in particular to a spunlace nonwoven fabric filter material and a manufacturing method thereof. Background technique [0002] The purification and dust removal filter materials currently used are generally needle-punched fiber felt and polyester spunbond materials. Needle-punched fiber felt has the following disadvantages: 1. The filtering accuracy is not high. The filtration accuracy of needle-punched materials is determined by the gap between fibers after the fibers are messy. At present, the fibers that can be processed by acupuncture are relatively thick, and the resulting pores are relatively large. 2. The stiffness of the material is not good, so it cannot be used for folding processing. It can only be used for bag or belt filtration, which takes up a lot of space. 3. The quantification of the product is relatively high, generally 120g / m 2 The following products are difficult to produce. 4. The init...

AI Technical Summary

Problems solved by technology

Needle-punched fiber felt has the following disadvantages: 1. The filtering accuracy is not high

2. The stiffness of the material is not good, so it cannot be used for folding processing, and can only be used for bag or belt filter, which takes up a lot of space

3. The quantification of the product is relatively high, generally 120g / m 2 The following products are difficult to produce

4. The initial resistance of the material is large

Due to the limitation of material processing technology, low-quantity products cannot be produced, and the fibers are closely arranged under the action of the mechanical force of the felting needle, forming a large initial resistance

5. The material cannot be blown back to clean dust, and the service life is not long

[0003] The disadvantages of polyester spunbond materials are: 1. The initial resistance of the material is relatively large

2. The opening rate is not high, and the air flow is not large

3. The opening is uneven, and the difference between the pore size and the air flow is large. The small pore size and the large air flow can only be achieved by increasing the area, which results in an increase in the amount of materials used.

4. This material cannot be blown back to clean dust, and its service life is not long. This material is also a deep filter material

5. Material filtration efficiency is not high

The pores of this material are also formed through the gaps between the fibers after the fibers are messy. Since the fibers are relatively thick, the solid filtration efficiency is not high.