JPS59228920A - Dust removing filter - Google Patents

Abstract

PURPOSE:To obtain a filter having high efficiency for catching dust with thin thickness and inexpensive constitution by using a sheet of sand cloth coated with or impregnated with a viscous substance in combination with an air-permeable sheet material. CONSTITUTION:A sheet of sand cloth is interposed between a fibrous woven cloth having permeability to air or nonwoven clothes 7, 8. The sand cloth is prepd. by impregnating a permeable woven fiber cloth, nonwoven cloth, or expanded urethane sheet with a soln. contg. high molecular hydrocarbon, natural or synthetic oil (or fat) or natural or synthetic oil (or fat) and dispersed uniformly with an org. solvent as dispersant, and removing the org. solvent with a dryer, etc. Suitable weight per area for the nowoven sheet is 250g/m<2>, and that for sand cloth is 10g/m<2>. When a nonwoven fabric sheet having ca. 5mm. thickness, or a sand cloth prepd. by laminating three sheets of gauze is used, >=99.5% dust collecting rate and 2mm. H2O pressure drop resulted.

Description

[Detailed Description of the Invention] Various dust removal devices are used for home, store, and industrial purposes to purify the outside air, capture dust floating in the air, and use it as clean air. In both cases, a cleaning device with a filter medium is used.

All of the existing filter media have a low dust capture rate (95% or less), and the pressure difference (pressure loss) before and after the filter medium is large, so they are not fully satisfactory. In order to increase the dust capture rate, it is possible to increase the thickness of the filter medium or increase the density, but on the other hand, pressure loss increases, resulting in energy loss and material height.

The present invention aims to solve the above problems,
Its characteristic feature is the combination of a breathable sheet-like material and a sand cloth coated with or impregnated with a viscous material.

Here, examples of the combinations will be explained. A. Textile woven fabric + Sand cloth + Non-woven fabric Non-woven fabric + Sand cloth + Non-woven fabric R Non-woven fabric + Sand cloth + Fiber woven fabric etc., and a slender cloth is interposed between the breathable fiber woven fabric or non-woven fabric.

The sand cloth used in the present invention is a solution (hereinafter referred to as viscous liquid, ratio: polymer hydrocarbon) in which natural or synthetic oil is added to polymer hydrocarbon, and an organic solvent is used as a dispersant to uniformly disperse the coexistence. 10 parts to 70 parts, natural or synthetic resin 10 parts to 20 parts, and organic solvent 80 to 10 parts) impregnated with a breathable fiber woven fabric, nonwoven fabric, or foamed urethane sheet,
The organic solvent is then removed using a dryer or the like, and the polymeric hydrocarbon and natural or synthetic oil and fat are adhered to a woven fiber fabric, nonwoven fabric, or foamed urethane sheet.

A fan, 4 is a filter, 5 is an exhaust duct, and 6 is an exhaust fan provided in the exhaust duct.

FIG. 2 is a schematic diagram showing the structure of the filter 4, in which 7 and 8 are nonwoven fabric sheets with an I/P of about 250 f;
9 is sand cloth and it is D10! In this example, three layers of nonwoven fabric treated as described above were used.

As described above, the present invention is made by sandwiching sand cloth coated with a viscous substance between breathable sheet-like materials. With this structure, it is possible to achieve a surprising improvement in the dust capture rate with a so-called thin and inexpensive structure without any additional effort.

According to experiments conducted by the present inventor, a filter material with a thickness of 15WIM, which is made by changing the density of conventional fiber nonwoven fabric from coarse to dense, has a dust capture rate of 89% and a pressure loss of 15.9 myp'fb.
For the non-woven fabric sheet 7.8, I prepared two sheets of non-woven fabric sheet 7.8 with a thickness of about 5 mm, and between them, I treated gauze cloth as the sand cloth 9 as described above and stacked three sheets, and the dust was captured. The rate was high, over 99.5%. The pressure loss at this time was an extremely small value of 2 tnttp/H20.

The product of the present invention reduces the thickness of conventional filter materials.
It can reduce the amount of heat to about the same level, contributing to the downsizing of the device, and is also extremely effective in reducing conut (monthly heat).

In the above embodiment, the sand cloth 9 is sandwiched between fibrous woven fabrics or non-woven fabrics, but instead of the fibrous woven fabrics or non-woven fabrics, a foamed urethane sheet having air permeability on at least one side may be used. In this case, in addition to the advantage of being able to reduce the price without changing the actual function and effect, the product can be rolled up into a cloth shape, which makes it easy to handle it during transportation and, for example, on the ceiling of a paint factory. This is very convenient for construction work where the adhesive is applied over the entire surface.

In addition, by mixing fine powder of activated carbon into the viscous liquid used in the present invention, in addition to removing dust, it can also have a deodorizing effect, and as another embodiment, it has excellent effects. . At this time, when two or more sand cloths 9 are used, the fine activated carbon powder may be directly sandwiched between the sand cloths 9.

In addition, by mixing an aromatic agent during viscosity imaging and adhering the aromatic agent to the sanding cloth together with synthetic oil, it is possible to achieve both dust removal and aromatic effects. Note that it may also be used in combination with the above activated carbon.

[Brief explanation of drawings]

The accompanying drawings show an example of the implementation of the present invention, and FIG. 1 is a usage pattern diagram, and FIG. 2 is a schematic diagram showing the configuration of a filter. 2...Suction duct 8...Suction fan 4
90. Filter 5, Exhaust duct 7.8
...Nonwoven fabric sheet 9 ...Sand cloth patent applicant Rei Sugioka Patent attorney representing Kura Hiroshi Kuma Minoru

Claims (4)

[Claims] (1) Air-permeable sheet material In response to the question, is there air permeability in a viscous solution made by adding natural or synthetic oils and fats to polymeric hydrocarbons and uniformly dispersing them using an organic solvent as a dispersant? A dust removal filter characterized in that it is composed of a sand cloth impregnated with fibrous fabric or non-woven fabric, from which an organic 9 solvent is removed. (2) The dust removal filter according to claim 1, wherein the sand cloth is a nonwoven fabric or foamed urethane sheet of about 777'aI)10y, and about 2 to 4 sheets are stacked one on top of the other. (3) Air-permeable sheet-like material A viscous liquid made by adding natural or synthetic oils and fats to high-molecular hydrocarbons, uniformly dispersing them using an organic solvent as a dispersant, and adding fine powder of activated carbon is air-permeable. A dust removal filter characterized by being constructed by interposing a sand cloth made by impregnating fibrous fabric or non-woven fabric and removing an organic solvent. (4) Breathable sheet material A breathable fiber fabric is created by adding natural or synthetic oil to a polymeric hydrocarbon, uniformly dispersing it using an organic solvent as a dispersant, and adding an aromatic agent to the viscous liquid. A dust removal filter characterized by being constructed by impregnating cloth or non-woven fabric with sand cloth interposed to remove organic solvents.