JPS61259702A - Filter - Google Patents

Abstract

PURPOSE:To simply and surely seal a filter, by forming a filter material, of which the terminal is closed and the upper and lower end parts are integrated by seal strips, into a pleated or spiral fin shape and integrally sealing a core surface and the seal strips by a sealant. CONSTITUTION:A filter material 3 formed by combining a filter membrane 4 and support meshes 5, 6 applied to both surfaces thereof is pleated and integrated only by strip like seal parts 7 under melting. Each strip-like seal part 7 is constituted by splicing or superposing films having no pores comprising a material same to or different from that of the filter membrane 4. The pleated filter material 3 is assembled on a cylindrical core 1 having a filtrate passage 2 opened to the intermediate part thereof and a sealant 8 such as an epoxy resin compounded with a curing agent is injected under pressure by a ring- shaped pressurizing jig to integrally seal the strip like seal parts 4 with the core surface.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to pleated and spiral type (hereinafter pleated type) membranes for gases and liquids (hereinafter referred to as fluids), ultra-lower membranes, separation membranes, reverse osmosis membranes (hereinafter referred to as LOCA membranes), etc. ) and other cylindrical cartridge filter mechanisms.

Ultra-precise fluid location is extremely important in many fields such as electronics, biochemics, medicine, and the food industry. Therefore, a large number of types of Roka films have appeared.

Loca efficiency is generally proportional to the effective surface area of the mouthpiece, so
How to make the cartridge compact and increase the surface area is an important point, and recently, cylindrical pleated cartridges and the like have come into widespread use. However, since Roca membranes are usually extremely thin, they are often reinforced with supports, and are often supported by mesh, woven fabrics, non-woven fabrics, etc., and these supporters also serve as spacers. . This multi-layered spout is then assembled into a cylindrical cartridge, and at this time it is extremely important to completely seal the upper and lower ends.

Usually, a pleat mold or the like is assembled and set on the outer circumferential surface of the cylindrical core in the center, and the upper and lower ends are immersed in the melted inner surface of the end cap, and a hardened integral seal is applied, or an epoxy Seal is performed using a sealing material such as resin.

However, materials that shrink during melt bonding and require pressure, such as stretched polycarbonate resin films, have various physical property problems, and none of these methods can be used universally. Cannot be used.

Patent application No. S59-135696 and S-5 by the present inventor
No. 9-218234 provides an effective sealing method and product for this fluorine membrane, but the present invention provides a simpler and more reliable sealing mechanism than those patents.

The present invention will be explained below with reference to the drawings.

Figure 1 is a longitudinal sectional view of the cylindrical pleated cartridge. 1) is a cylindrical type with a closed bottom and a core with a filtrate passage 2) opening in the middle in the form of a porous or structured structure. 3) as shown in the enlarged sectional views in Figures 2 and 3. 4) Roca membrane etc. It has a structure that combines and integrates the double-sided support mesh, etc. of 5) and 6). 7) pleats 3) at the band-shaped seal part at the upper and lower ends of 3), and 4) and 5 only in this part.
), 6) are integrated by melting or sealed with adhesive, etc. However, in this sealing part, the intermediate Roca membrane may be made of the same material as the Roca membrane, or a non-porous membrane made of a different material may be added or superimposed.

This added or superimposed membrane is extremely effective when the membrane is extremely thin and has low strength, such as a stretched Roka membrane, or when a multilayer rail cannot be easily formed like a fluorocarbon membrane. 8) is 7)
This is a sealant that embodies the sealing mechanism of the present invention between the small diameter portion outer periphery 9) of 1) at a position corresponding to . This sealant may be made by melting and solidifying the same material as the core, support mesh, and membrane or a material that has an affinity for it, or may be a hardening resin sealant such as epoxy resin.

Furthermore, it is preferable to provide grooves or the like on the surface 9) to improve the adhesive effect. The height of 8) is slightly lower than that of 7).

Figure 2 is a partial enlarged view of the A-A cross section in Figure 1, where 1) shows the core, 7) shows the band-shaped seal part of the pleat 3), 8) shows the sealant, and 9) shows the outer periphery of the small diameter part of 1). . Pleats 3) are usually pleat cartridges with a diameter of 70 and the number of threads is 30 to 30.
Although not shown, in the case of a spiral type fin, the number is about 3 to 60, but the number is not limited to this.

In order to press-fit the sealant in 8) into the positions shown in Figures 1 and 2, if the sealant is, for example, epoxy resin mixed with a hardening agent, it must be made of a non-adhesive resin such as polypropylene, or a molten resin. Similarly, when using Yu-Seal, 1)
, 3), which has no affinity with the sealant when cooled, and which has an internal gear-like cross section and serves as a spacer and presser of an appropriate thickness, is inserted between the pleats, and when press-fitting the sealant, this is inserted. No leakage 7)
Fix it firmly. Next, the sealant 8) is press-fitted into a predetermined position using the ring-shaped pressing jig shown in FIG. 12).

When melting and press-fitting a sealant, first the seal part,
Heat the sealant molded into a ring shape appropriately in advance or heat it to an extent that does not cause deformation such as shrinkage, and melt the resin.
While pressing down the pressure ring in 2), the sealant is melted and an integral seal is applied to the part. After the sealing is completed, 12) is cooled with cold air, etc., and removed together with 11). Get the finished product.

Figure 3 is a partial enlarged view of the cross section taken along line B-B in Figure 1, in which 1) is the core, 2) is the oral fluid passage, 4) is the loca membrane, and 5) and 6) are the supporters and spacers. The fluid to be located flows in the direction of the arrow from 2) through the spaces 10) of the pleats, but it can also flow in the opposite direction.

Although not shown, protective end caps, cover cages, etc. are provided as appropriate. However, for loca applications that utilize crossflow, such as extreme loca, the end cap has a shape such as a gable. Although the present invention has been described above mainly with respect to a cylindrical pleated cartridge, it is clear that the sealing mechanism of the present invention can be similarly applied to a spiral cartridge. Since the spiral type has a long fin section and is wound around a core, it is possible to increase the loca area without increasing the outer diameter of the cartridge. Furthermore, the present invention can be effectively used for pleated loca units having a cross-sectional shape such as a rectangular shape instead of a cylindrical shape.
All are included in the present invention.

However, since the known spiral type cartridge has a single combined spout wound around a core, the length of a part of the filtrate flow path is equal to the spout length, but in the present invention, the same single combined spout is wound around the core. Even if a cartridge is used, since it is folded into many spiral fins, the maximum fluid flow path length will not exceed the length of these fins, so it cannot be used with a known spiral type cartridge. In comparison, the flow path length is much shorter, the overall loca resistance is extremely small, and the loca efficiency is extremely high.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a pleated filter of a cylindrical cartridge according to the present invention. The second figure is a partially enlarged view of the cross section taken along the line A-A in the first figure. The third figure is a partially enlarged view of the cross section taken along line B-B in the first figure. It is.

Claims (1)

[Claims] The ends of the Roca material, which is composed of overlapping filtration (ROCA) membranes, supporters, spacers, etc., are closed, and the upper and lower ends are integrated with a band-shaped sealing part. , or a superimposed structure, in which the pleats and spiral fins are assembled on the core, and the sealing mechanism is integrated with the core surface near the upper and lower ends of the core, the pleats, and the sealing band of the spiral fin with a sealant. The structure of the pleated, spiral cylindrical cartridge filter is characterized by: