JPH02119907A - Filter material and its production - Google Patents

Abstract

PURPOSE:To obtain a filter material having superior deodorizing power by depositing a fine pulverous deodorizing agent consisting of a mixture of TiO2 and ZnO, and water onto a sheet having three-dimensional net-like structure without causing film- shaped clogging of the net-like structure or burying the whole body of the net-like structure in an adhesive layer. CONSTITUTION:An appropriate amt. of an adhesive material is applied in an adhesive material applying section 3 to a sheet 1 having a three-dimensional net-like structure removed of a film-shaped body of foamed body. Then, a fine pulverous deodorizing agent consisting primarily of a mixture of TiO2 and ZnO, contg. some water is scattered in a deodorizing agent scattering section 4 from either one of front or rear surface of the sheet 1, and a part of the scattered deodorizing agent is recovered by sucking from another surface side. Thus, the deodorizing agent is distributed uniformly in a range from its surface and in the internal structure of the sheet 1. In a succeeding solidifying-fixing section 5, the adhesive material is solidified and the fine pulverous deodorizing agent is fixed to the sheet 1. Further, unfixed deodorizing agent is recovered in a recovering section 6 of the unfixed deodorizing agent. Obtd. filter material causes only small pressure loss and has superior deodorizing power.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is particularly suitable for filter materials for air purifiers, air conditioners, etc., and which contains a fine powder deodorizing agent and also has a deodorizing function. This article relates to the part and its manufacturing method.

BACKGROUND OF THE INVENTION As life becomes more affluent, the demand for removing odors has expanded from so-called bad odors to even the most familiar odors in daily life.

In particular, devices that create a comfortable environment in relatively closed spaces, such as air purifiers and air conditioners, are not only concerned with simple dust removal and temperature/humidity control, but also with the issue of odor treatment. It has become.

For this reason, the development of deodorizing agents has been actively carried out, and substances that are far superior to conventional activated carbon have been created one after another. A deodorizing agent in the form of a white fine powder containing the following ingredients has been developed. In addition to deodorizing malodorous molecules by reducing them to low molecular weight through catalytic action, zinc oxide in the ingredients chemically adsorbs acidic gases, and titanium dioxide is thought to physically adsorb alkaline gases, especially ammonia and hydrogen sulfide. Excellent adsorption.

As such a fine powder deodorizer, there is a so-called TZ deodorizer manufactured by Titan Kogyo Co., Ltd., which is made by mixing an aqueous solution of a water-soluble titanium compound and a water-soluble zinc compound with an alkaline aqueous solution. Obtained by drying the resulting precipitate.

At the same time, efforts have been made to develop ways to make deodorizers function as filter materials without reducing their original deodorizing power. , spinning raw materials, foaming raw materials, etc., may be mixed and contained at the time of raw materials, impregnated after the organization of paper, cloth, sponge, etc. is completed, or sandwiched between breathable covering materials such as thin non-woven fabrics or sponges. Efforts have already been made to include such information.

Problems to be Solved by the Invention However, given the requirements for low pressure loss and simplicity, non-woven fabrics and foam structures are suitable, but they do not contain deodorizing agents mixed in from the raw materials. If so, the deodorizing agent may adsorb reactive gases during processing, or the glue component or resin itself may act as a binder and coat the fine powder deodorizing agent, making it impossible for the deodorizing agent to exhibit its original deodorizing power.

In addition, in the method of simply impregnating, the goal of reducing pressure loss and supporting as much deodorant as possible tend to go against each other, making it impossible to obtain a satisfactory result.

In the method of enclosing with a breathable covering material, the degree of pressure loss is mostly determined by the ventilation of the front and back covering materials, and this is in a contradictory relationship with the particle size of the fine powder deodorizer that can be carried.

In addition, there are many black-colored deodorizers, and with these, you can only obtain a filter material that does not give a very clean feeling of black color.

Means for Solving the Problems Therefore, in order to solve the above-mentioned problems, the second invention includes a three-dimensional network structure tissue sheet from which the membrane part of the foam has been removed, and a combination of titanium dioxide and zinc oxide. Mainly composed of hybrids,
A filter material characterized in that a fine powder deodorizer containing some water component is kept in a state where the network tissue is not occluded into a film, although it may enlarge the diameter of the network tissue. In addition, the method for manufacturing a filter material according to the second invention includes a step of applying an appropriate amount of adhesive to a three-dimensional network structure tissue sheet from which the membrane part of the foam has been removed, and then applying the adhesive from one side of the front and back sides. This sprays a fine powder deodorizer mainly composed of a mixture of titanium dioxide and zinc oxide and contains some water components, and also sucks and collects some of the sprayed from the other side. A step of distributing the fine powder deodorizing agent to the tissues, and then solidifying the adhesive,
The third invention is characterized by comprising a step of fixing the fine powder deodorant to the tissue sheet, and a step of recovering the fine powder deodorizer that is not fixed. The step of applying an appropriate amount of adhesive to the three-dimensional network structure tissue sheet from which the While dispersing the fine powder deodorizer, the tissue sheet is rocked to allow a part of the scattered part to pass through to the other side, so that the fine powder deodorizer is spread not only on the surface but also on the internal tissues and adheres to the tissue sheet. The process and then
The present invention is characterized by comprising a step of solidifying the adhesive to fix the fine powder deodorizer to the tissue sheet, and a step of collecting the fine powder deodorizer that has not been fixed.

Function: Although the filter material of the present invention may enlarge the diameter of the network tissue, it supports the fine powder deodorizer without clogging the network, and the membrane-like part of the foam is The three-dimensional network structure that is removed does not reduce the original excellent breathability, and the fine powder deodorizer is supported on the entire surface without being buried in the adhesive layer, so it comes into direct contact with odor components, Its catalytic action deodorizes malodorous molecules by reducing them to lower molecules, and
Zinc oxide in the ingredients chemically adsorbs acidic gases, and titanium dioxide physically adsorbs alkaline gases.

In addition, the overall finish is white, giving a sense of cleanliness, and the antibacterial properties of the fine powder deodorizer itself prevent the growth of mold.

In addition, the method for manufacturing the filter material of the present invention involves spraying the fine powder deodorizer from one side and collecting the sprayed part by suction from the other side, or shaking the tissue sheet to collect the sprayed part. Since the part is passed through to the other side, the dispersed fine powder deodorizer adheres to the tissue above, and the fine powder deodorizer that cannot adhere to the tissue gradually enters the inside, increasing the diameter of the network tissue. This may result in a large amount of fine powder deodorizing agent being fixed, but this prevents the network tissue from becoming blocked in a membrane-like manner, and the inherent advantage of the three-dimensional network structure created by removing the membrane-like part of the foam. Moreover, since the fine powder deodorizer that is not adhesively fixed is collected afterwards, it will not be scattered later as dust.

EXAMPLE Next, an example of the present invention will be described. In this example, the fine powder deodorizer containing titanium dioxide and zinc oxide as main ingredients was manufactured by the above-mentioned Titanium Kogyo Co., Ltd.

Incidentally, this product is obtained by mixing an aqueous solution of a water-soluble titanium compound and a water-soluble zinc compound with an alkaline aqueous solution and drying the resulting precipitate. Add sodium hydroxide and potassium hydroxide to a mixed aqueous solution containing a titanium compound and a zinc compound such as titanium sulfate, titanium chloride, titanium nitrate, zinc sulfate, zinc chloride, zinc nitrate, etc. in a molar ratio of 7:3 to 3. , barium hydroxide, ammonia, etc., at a reaction temperature of 40 to 60°C, to a final pH of 7 to 9.
Preferably, the precipitate is mixed at a temperature of 150 to 220° C. and dried at 150 to 220°C. Incidentally, during the drying, a small amount of silico oil or the like may be added to suppress coagulation and solidification during drying.

In addition, for the tissue sheet with a three-dimensional network structure from which the membrane-like part of the foam has been removed, the polyurethane foam is chemically treated to completely remove the membrane-like part, and is already used as the skeleton of the three-dimensional structure. "New Everlight Scotto" manufactured by Brideston Co., Ltd., which is covered with bare semi-cells 13 cells/inch and has a thickness of 10 mm, was used.

Since the filter material of the present invention can be fully understood by explaining the manufacturing method thereof, next, an example of the manufacturing method using the illustrated apparatus will be described. 11th! In I, 1 is the tissue sheet, 2 is the fine powder deodorizer, and the mwa body sheet L is long, and in the embodiment, it is sequentially unrolled from a long roll 11 having an appropriate width. Until it is cut and collected, adhesive is applied, the fine powder deodorizing agent is spread, assimilated and fixed, and the unadhered fine powder deodorizing agent is collected.

Reference numeral 3 denotes an adhesive applying part for applying an appropriate amount of adhesive over the entire width of the tissue sheet L that has been fed out, and in the embodiment shown in FIG. A paint recovery hood 32 is opposed to the paint recovery hood 32 via the sheet 1,
A suction fan 33 is connected to the paint recovery hood 32, and the adhesive in the form of atomized droplets is sprayed from the paint spray port 31 toward the tissue sheet 1, and the adhesive is sprayed onto the tissue sheet 1. adhere to. Inside! The adhesive that has passed through without adhering to any woven skeleton is suctioned and collected by the paint collection hood 32. Therefore, an appropriate amount of adhesive adheres to the tissue sheet 1 not only on the surface but also on the inside.

In addition, as shown in FIG. 2, this adhesive applying section 3 includes a dipping tank 34 filled with adhesive and a pair of upper and lower rolls 35 thereafter.
The above-mentioned MI sheet 1 is placed in the dipping tank 3.
4, the adhesive may be squeezed by passing through a roll 35, and in some cases, excess adhesive may be removed by blowing high-pressure air (not shown).

Although any commercially available adhesive may be used as the adhesive, in the example, a slightly diluted acrylic transparent paint was applied. In this sense, the adhesive is not limited to one that chemically bonds and joins, but may be any adhesive that can finally chemically or physically fix the fine powder deodorizing agent.

4 is the tissue sheet 1 coated with an appropriate amount of adhesive;
a deodorizer spraying section for spraying the fine powder deodorizer 2 over the entire surface of the spray tank 41, the whole of which is swingable and has a wire mesh on the bottom;
It consists of a lower deodorizer collection hood 42 connected to a suction fan 43, and the fine powder deodorizer 2 sprayed from above is sucked from below through the tissue sheet 1, thereby being sprayed. The fine powder deodorizer 2 is given momentum and is sufficiently distributed to the inside of the amm comb 1, and a considerable amount adheres to the network tissue without forming a membrane and passes between the tissue skeletons. However, some of the fine powder deodorizing agent that was not adhered to the deodorizer is collected as is.

As shown in FIG. 3, the deodorizer dispersing unit 4 temporarily sandwiches the tissue sheet 1 between the swinging frames 44 and shakes the tissue sheet 1 together with the swinging frame 44 to spread the tissue. The mesh structure of the sheet itself may act like a sieve, allowing the material to pass between internal structures.

Reference numeral 5 denotes an assimilation fixing section, and in this embodiment, a large number of hot bulbs 51 are placed so that hot air reaches the tissue body 1 from above. Therefore, the adhesive solidifies and the fine powder deodorizer 2
becomes fixed. In particular, the fine powder deodorizing agent 2 is energized by the suction fan 43 or the like and sticks to the adhesive in a piercing manner. By hardening the area around the agent 2, it has enough fixing strength to withstand use, and
Since the fine powder deodorizer is sprayed after the adhesive is applied, at least the top portion of the fixed fine powder deodorizer 2 is not buried in the adhesive layer, and the fine powder deodorizer itself is exposed to the atmosphere. can.

Note that when a special material such as a UV-curable resin is used as an adhesive, a certain solidification and fixing treatment is performed to cure the adhesive, such as by irradiating it with ultraviolet rays.

Reference numeral 6 denotes a collecting section for the unattached deodorizing agent, and in the embodiment, it is connected to a suction fan (not shown), and has a suction port on its circumferential surface and a roller 61 with brushes planted thereon, which is rotated to rub the surface. The fine powder deodorizer that was not fixed with adhesive is collected by suction.

Reference numeral 7 denotes a cutting section that cuts the product into an appropriate size, and then it is packaged or incorporated into an air purifier or air conditioner as it is.

However, the filter material made in this way is
Although a large amount of the fine powder deodorizer is fixed to enlarge the diameter of the network, it does not block the network, so a tertiary product made by removing the membrane part of the foam Without deteriorating the original excellent breathability of the original mesh-structured tissue sheet,
In addition, since the fine powder deodorizer is not completely buried in the adhesive layer but is partially exposed and supported, the contact between the odor component and the fine powder deodorizer is direct, and the fine powder deodorizer Since it is a fine powder deodorizing agent mainly composed of a mixture of titanium dioxide and zinc oxide and containing some water component, it exhibits the above-mentioned excellent deodorizing power. In addition, since this fine powder deodorizer is white, the entire filter material has a white finish, giving a sense of cleanliness.Furthermore, the antibacterial properties of this fine powder deodorizer prevent the filter material from becoming moldy. It also prevents the occurrence of such things.

In addition, according to the method for manufacturing the filter material of the present invention, the fine powder deodorizer that is placed on the cloth adheres to the upper tissue, and the fine powder deodorizer that cannot adhere to the fabric gradually enters the inside and adheres to the inside. Although a large amount of fine powder deodorizing agent is fixed in such a way as to enlarge the diameter of the mesh tissue, it is prevented from clogging the mesh tissue in the form of a membrane, so the air permeability is not significantly reduced. Furthermore, since the excess fine powder deodorizer is collected afterwards, it will not be scattered later as dust.

Furthermore, unlike conventional activated carbon, etc., it does not adsorb gas during foaming and almost eliminates the advantage of containing it in the filter material.

The filter material of the present invention is best used as a filter, but since the three-dimensional network structure sheet from which the membrane-like portion of the foam has been removed has a certain degree of cushioning properties, it has good deodorizing power and cushioning properties. For example, it can be used as a cushioning material for seats, headrests, etc., or as an interior material for instrument panels, etc. In this sense, this filter material can be used as a cushioning material for seats, headrests, etc. It should be noted that this also includes.

As described above, the present invention uses Titanium Industries Co., Ltd.'s commonly known TZ deodorizer as a fine powder deodorizer mainly composed of titanium dioxide and zinc oxide, and uses a three-dimensional network structure in which the membrane part of the foam is removed. Although the explanation has been made using "Varnish-Everlight Scotto" manufactured by Brideston Co., Ltd. as the tissue sheet, the present invention is not limited to this, and similar deodorizers,
Of course, Nli woven sheets could also be used.

Further, in the above embodiment, the fine powder deodorizing agent is applied only from the front side of the tissue sheet, but the present invention is not limited to this, and the tissue sheet can be turned over afterwards to apply the fine powder deodorizer to the back side as well. The present invention does not exclude the application of fine powder deodorizing agent from both sides by repeating the same process, but rather it is actively contemplated.

More than the effects of the invention, according to the present invention, the pressure loss is small and simple,
Moreover, it can be provided as a filter material that gives a sense of white cleanliness and exhibits truly excellent deodorizing power.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the whole of an apparatus for embodying the method for manufacturing a filter material of the first invention, and FIG.
The figure is a side view of a part of the other apparatus, and FIG. 3 is a side view of a main part of the apparatus for embodying the method for producing a filter material of the second invention. 1...Wi woven sheet 3...Adhesive application section 5...Solidification fixing section 2...Fine powder deodorizer 4... Deodorizer spraying section 6...Unattached deodorizer collection section

Claims (3)

[Claims] (1) A fine powder deodorizer mainly composed of a hybrid of titanium dioxide and zinc oxide and containing some water component is applied to a three-dimensional network-structured tissue sheet from which the membrane-like portion of the foam has been removed. A filter material that is characterized in that it supports the entire surface of the network in an adhesive layer without being buried in the adhesive layer in a state that does not obstruct the network tissue in a membrane-like manner, although it may enlarge the diameter of the filter material. (2) A step of applying an appropriate amount of adhesive to the three-dimensional network structure tissue sheet from which the membrane-like portion of the foam has been removed, and then applying a mixture of titanium dioxide and zinc oxide as the main component from one front and back of the sheet. Then, a fine powder deodorizer containing some water component is sprayed, and a part of the sprayed powder is collected by suction from the other side, so that the fine powder deodorizer is distributed not only on the surface but also on the internal tissues. The method is characterized by comprising a step of attaching the powder, a step of solidifying the adhesive to fix the fine powder deodorizer to the tissue sheet, and a step of collecting the fine powder deodorizer that has not been fixed. A method for manufacturing filter material. (3) A step of applying an appropriate amount of adhesive to the three-dimensional network structure tissue sheet from which the membrane-like portion of the foam has been removed, and then applying a mixture of titanium dioxide and zinc oxide as a main component to the front and back sides of the sheet. Then, a fine powder deodorizer containing some water component is sprayed, and the tissue sheet is shaken so that a part of the sprayed deodorizer passes through to the other side, so that it is distributed not only on the surface but also on the internal tissues. a step of attaching the fine powder deodorizing agent to the tissue sheet, a step of solidifying the adhesive to fix the fine powder deodorizing agent to the tissue sheet, and a further step of recovering the fine powder deodorizing agent that was not fixed. A method for producing a filter material, comprising: