JPS60187316A - Filter and its manufacturing method - Google Patents

Abstract

PURPOSE:To obtain a filter high in space utilization and low in pressure loss without causing unstable performance by making practically a filter film made of paper which is arranged in a peculiar shape of all filter constituting materials. CONSTITUTION:Sealed ends of cells 4a which are formed with cellular striation workpieces 2 and paper 1a of the inside thereof are positioned at opening face opposite to opening, face at which sealed ends of cells 4b formed with cellular striation workpieces 2 and paper 1b of the outside thereof are positioned. Thus, since two kinds of cells existing in the same layer of laminated structural module have the different sealed ends, the sealed ends are reversed at the interval of 1/2 layer. This filter is manufactured by making one body of both paper 9 which has been treated with cellular striation work and is fed between stepped rolls 10, 11 and unworked flat paper 12 feeding between a stepped roll 11 and a press roll 13 while sticking a sealing compound and furthermore by winding up said body.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filter used for gas filtration and a method for manufacturing the same.

Conventionally, filters for gas sources have been made by intertwining various organic fibers, rock wool, glass fibers, etc. in a felt-like manner, or by making the above-mentioned fibers into paper suitable as a filter medium, and molding as needed. A typical example is a processed one. However, a felt-like material has a small filtration area per volume and has extremely low filtration capacity. Paper processed products are much better in this respect, but the structure of the filtration device that is incorporated into them is complicated.)
Not only does the overpassing device as a whole become detachable and expensive, maintenance and inspection are not easy, and the manufacturing method requires improvement, such as making it difficult to manufacture large-diameter devices.

In view of the current situation as described above, the present invention was completed as a result of repeated research by the present inventors with the aim of providing a better filter. This invention consists of a second invention relating to a manufacturing method.

The filter according to the first invention has cell openings in a honeycomb structure in which Ariiso fiber Alt paper, which is suitable as a gas filter medium, and corrugated products thereof are laminated alternately with the full gate direction aligned. Only one of the openings at both ends of each cell is sealed, and the sealed end is partially sealed on the opposite side every 1/2 layer. Further, the method for manufacturing the filter of the first invention according to the second invention includes:
While continuously feeding a long sheet of sat paper, a sealant is attached to the edge of one side, and a similar sheet (i.e., an organic fiber suitable as a gas filter medium) is attached to the side of the sheet to which the sealant is attached. A long sheet of paper (However, it does not have to be made of the same fiber material as that used for processing as described in 1) is supplied and adhered. The space between the sheet edge and the corrugated workpiece is filled with the sealant applied in "2.A", and then the sealant is applied on the full-date workpiece at the opposite edge to form the valley of the full-date workpiece. The method is characterized in that the sheet after the treatment described in item 1 and the laminated sheet of the corrugated product are rolled into a roll.

FIG. 1 is a perspective view showing an example of the filter of the first invention manufactured by the manufacturing method of the second invention. The basic structure of this filter is a type of honeycomb structure in which paper 1 made of organic fibers and corrugated paper 2 are stacked on top of each other to form a kind of honeycomb structure. In the contact part of the step top part 3 of the full date,
Bonded with adhesive.

Moreover, only one end of the tunnel-shaped cell 4 formed of the paper 1 and the corrugated workpiece 2 is sealed with a sealant 5 in the following manner. That is, FIG. 2 (partially enlarged view of the cell opening surface ■ side in FIG. 1) and FIG. 3 (
As is clear from the partially enlarged view of the cell opening side ■ in Fig. 1), the cell 4a (hereinafter referred to as A-layer cell The sealed end of the cell 41] (hereinafter referred to as B
The sealed end of the layer cell is located on the opposite side of the opening. Since the two types of cells in the same layer in the laminated structure have different sealing ends, the sealing ends are reversed every 1/2 layer.

Due to the structure described above, when the gas to be filtered is pumped from the opening 3-mouth side of this filter, the gas is first sealed at the opening 1 side, as shown in Fig. 4. After that, the dust enters the 8-layer cell 4b, which is not in the 8-layer cell 4b, and then passes through the cell partition wall 6 (made of paper 1 or full-gate processed material 2) and moves to the adjacent A-layer cell 4a. collected and filtered. The filtered gas that has entered the A-layer cell 4a is discharged from the unsealed opening side (2).

The filter of the present invention does not need to be made from a rolled-up laminate as in Example 2, but can be made from organic fiber paper 7 cut to an appropriate size and processed with full gate as shown in FIG. The same cell sealing treatment as the upper side may be applied to the alternately laminated body with the material 8.

The thickness and filtration characteristics of the organic fiber paper in the filter of the present invention, the opening area and length of the cells, and the opening area and shape of the filter as a whole can be arbitrarily selected depending on the application and usage conditions. .

Next, the manufacturing method of the second invention, which is the most advantageous manufacturing method of the filter of the invention, will be explained.

The starting materials used are cellulose-based paper using wood pulp and rayon fibers, synthetic fibers such as vinylon, polyethylene 4-fibers, and acrylic fibers, as well as those using cellulose fibers and synthetic fibers. Although mixed paper and the like can be used, it is particularly preferable to use these papers that have been subjected to flame retardant treatment. Needless to say, the paper must be suitable as a filter medium, so its thickness is approximately 0.15 to 0.50 mm, depending on the purpose of the filter.
, porosity is about 10-35%, average x pore size is about 0.3-3
It is desirable that μ.

The prepared paper is divided into 1 portion, and one side is subjected to so-called corrugating using, for example, a corrugating machine for manufacturing corrugated board. The waveform, wave height, and wave interval are arbitrary. The full-gate processed paper and the unprocessed flat paper are combined with a sealant as described above and then rolled up. Using a device like the one shown is efficient. The paper 9 for full-gate processing is fed between corrugated rolls 10.11 and corrugated there. A binder is applied to the corrugated top portion of the processed paper 9 from the left side in FIG. 6 by a coating device (not shown) while the paper is on the corrugating roll 11''. On the other hand, a similar paper 12 is fed between the corrugated roll 11 and the press roll 13, but a paste-like sealant 14 is applied to one side edge midway. The gap between the corrugated roll 11 and the press roll 13 is the same as that between the cordate processed paper 9 and the flat paper 1.
Since the thickness is almost equal to that of the two rolls stacked together, what comes out from between the two rolls is the so-called one-sided corrugated cardboard-like overlapping cross-sheets 9 and 12, which are sealed in the gap between the two at one end. It is filled with agent 14.

The sealant 15 is applied to the full-gate processed paper 9 of this polymeric sheet at the edge opposite to the edge to which the sealant has been applied so that the valleys of the full gate are filled and the surface becomes flat. attach it to. Note that 16 and 17 are rollers for flatly depositing the sealant at a predetermined height, and 18 is a scraping plate for removing the sealant that does not protrude to the sides. After the above-mentioned processing is completed, winding is carried out using a winding device (not shown), which applies a binder to all or part of the top of the step, if necessary.

The sealant and binder used in step 1 are those that have sufficient heat resistance, chemical resistance, etc., taking into account the usage conditions of the product. Although it is acceptable to use the same binder as the sealant and the binder (for adhesion), it is desirable to use a sealant that exhibits less volume shrinkage during curing and has good filling action. Examples of binders that can be used for sealing and/or adhesion include solvent-based organic adhesives such as rubber-based, silicone-based, polyurethane-based, and phenolic resin-based adhesives, as well as acrylic resin-based or vinyl acetate resins. There are other types of emulsion type adhesives.

The resulting rolled laminate is heated to harden the sealant and binder, resulting in a filter having the same shape as that shown in FIG.

The dual filter of the present invention has the following advantages compared to conventional gas filters.

(b) Virtually all filter components are filtration membranes made of paper, and because they are arranged in a unique shape, the filtration area per unit volume is extremely large, achieving high space utilization. Moreover, pressure loss is also low.

(b) Even if paper is used as a filter medium, since it has a honeycomb structure, there is no risk that it will partially deform or oscillate during use, leading to unstable performance.

(c) Since it is light and is made up of one block, replacement and maintenance and inspection work is easy, and there is no fear of the collected dust being re-dispersed.

(d) After use, it can be disposed of by incineration.

According to the manufacturing method of the second invention, this high-performance filter can be easily manufactured with extremely high productivity, and it is also possible to manufacture large-sized filters that were conventionally difficult to manufacture as a single unit. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a filter according to the present invention. FIG. 2: A partially enlarged view of the cell opening surface I side in FIG. 1. FIG. 3: A partially enlarged view of the cell opening side ■ in FIG. 1. FIG. 4: An explanatory diagram of gas flow when the filter of FIG. 1 is used. FIG. 5 is a perspective view showing another example of the filter according to the present invention. FIG. 6 is an explanatory diagram of an example of a lamination step in the manufacturing method of the present invention. Figure 7: Figure 6 (plan view). 1.7, 9.12: Organic fiber paper 2 Nicol gate processed product 4: Cell S, 14.15: Sealing agent 8: Full gate processed product 10.11: Stepped roll agent Patent attorney Board valve - Oboro 8 -

Claims (5)

[Claims] (1) Cell openings in a honeycomb structure in which organic fiber paper suitable as a gas filter material and full-gate products thereof are laminated alternately with the direction of the full gates aligned, and openings at both ends of individual cells. A filter that is partially sealed so that only one side of the filter is sealed and the sealed end is on the opposite side every 1/2 layer. (2) The filter according to claim 1, wherein the organic fiber paper is flame-retardant treated. (3) The filter according to claim 1, wherein the honeycomb structure is formed by stacking organic fiber paper suitable as a gas filter medium and a corrugated product thereof and winding it into a roll. (4) While continuously feeding a long sheet of organic fiber paper suitable as a gas filter medium, a sealing agent is attached to the edge of one side, and the same is applied to the surface of the sheet to which the agent is attached. (Corrugated sheet of sheet) jJII Omono is supplied and bonded, and the space between the edge of the sheet and the full-gate workpiece is filled with the above-described sealant, and then the sealant is applied onto the full-gate workpiece at the opposite edge. 1. A method for producing a filter, which comprises applying a sealant to fill the valleys of the corrugated product, and winding up the treated sheet and the laminated sheet of the full-gate product into a roll. (5) The manufacturing method according to claim 4, wherein the organic fiber paper is treated with miscellaneous paper.