JPH0135220Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a super-element in which a porous synthetic resin thin film is formed into a chrysanthemum-shaped cylinder and is used to treat chemical solutions, pure water, or various gases. .

(Prior art) In the field of manufacturing electronic device parts, pharmaceuticals, and foods, it is desirable to use highly pure chemical solutions, pure water, or gaseous bodies, and filters that process these fluids must have chemical resistance and heat resistance. To meet this demand, a porous thin film (about 30μ to 250μ thick) made of tetrafluoroethylene or polypropylene (approximately 30 μm to 250 μm thick) is coated on the front and back sides of a porous thin film (about 30 μm to 250 μm thick) made of tetrafluoroethylene or polypropylene, as shown in Figure 4 (a) and (b). To maintain the gap, net cloth B (30 to 50 meshes, thickness is about 0.2 to 2 mm) of the same material is layered to give appropriate rigidity and elasticity, and then formed into a chrysanthemum-shaped tube. A porous inner cylinder 2 and an outer cylinder 3 made of the same material are inserted into the inside and outside of the material 1, respectively, and an end plate 4 made of the same material and shaped like a plate is placed on the top and bottom.
5 to form a super-element, which is then housed in a pot-shaped container made of the same material.

(Problem that the invention attempts to solve) By the way, in this type of over-element, the material 1
It is necessary to join the upper and lower end plates 4 and 5 airtightly, but since the material 1 and the end plates 4 and 5 are made of limited materials as mentioned above, ordinary adhesives cannot be used. Since this is not possible, a melt of the same synthetic resin (hereinafter referred to as a binder) must be used to join them.

However, this is of high viscosity and
At the center of the material 1, the pitches are small and dense, but at the outer periphery, the pitches are large and sparse. When you push in,
As shown in Fig. 4C, the binder 6 is difficult to enter into the folds of the material 1 near the center, and escapes outward, and is distributed in a gradient state and hardens. If the bond becomes thin and insufficient, the airtightness may be broken, and in worse cases, it may peel off.

Therefore, the purpose of this invention is to provide an over-element in which the binder is evenly distributed between the material and the end plate without being biased to one part, and the material and the end plate can be reliably bonded. be.

(Means for solving the problem) Based on the above-mentioned purpose, this invention is based on the inside of a material formed into a chrysanthemum-shaped tube by layering synthetic resin net cloth on the front and back of a porous thin film made of synthetic resin. A porous inner cylinder made of synthetic resin and having thick flanges projecting outward is inserted into the upper and lower parts, and a porous outer cylinder made of synthetic resin is fitted onto the outside, and the upper and lower ends of the above material are fitted. The material is characterized by forming a dense portion with deformed pleats, and by interposing a binder at the upper and lower ends of this material, plate-shaped end plates made of synthetic resin are fitted and joined together.

(Example) Figures 1 and 2 show examples of this invention, and 1 is a material that is highly resistant to chemicals and heat, such as tetrafluoroethylene or polyethylene, as described above. It is formed into a chrysanthemum-shaped tube by overlapping a mesh cloth b made of the same material on the front and back sides of a porous thin film a made of synthetic resin, and inside it is made of the same synthetic resin as material 1 and has upper and lower ends. A thick flange 2 protrudes outward to approximately half the width of the folds of the material 1.
A porous inner cylinder 2 with holes a and 2b is inserted, and a normal porous outer cylinder 3 made of the same material is fitted on the outside. A large number of folds are crushed irregularly between the flanges 2a, 2b and the outer cylinder 3 to form dense parts 1a, 1b, and at the upper end of such a semi-assembled member, a dish-shaped plate with a pipe made of the same material is formed. The upper end plate 4 is fitted with a stepped plate-shaped lower end plate 5 made of the same material with a binder 6 interposed, and the end face of the material 1 including the inner and outer cylinders and the end plate 4 or 5 are bonded by the binder 6. It is joined.

When assembling it, the material 1 formed into a chrysanthemum-shaped tube is slightly expanded and the inner tube 2 is inserted into it, and then the material 1 is folded so that the folds of the material 1 are densely arranged around the inner tube 2. The outer cylinder 3 is fitted on the outside of the outer cylinder 3, and then the required amount of binder 6 is injected into the lower end plate 5, and the lower end of the semi-assembled material is pushed into it to join the two, and then it is turned over. Then, the element is assembled by injecting the same required amount of binder 6 into the upper end plate 4 and pressing and joining the ends of the material therein.

In this case, since average dense areas 1a and 1b are formed at the upper and lower ends of the material 1 due to irregular deformation of the folds, the material is inserted into the end plate 4 or 5 into which the binder 6 is injected. When you push it in,
The binder 6 has no place to escape, so it is uniformly distributed around the entire circumference without being concentrated in one part, and the material 1, both the inner and outer cylinders, is reliably joined to the upper and lower end plates 4 and 5.

In addition, Fig. 3 shows an example in which the left and right lengths of each pleat of the chrysanthemum-shaped material 1 are made different so that each pleat is inclined in the same direction around the inner cylinder 2 in order to increase the overarea. In this case, the upper and lower end portions of the material 1 are pressed by the thick flanges 2a and 2b of the inner cylinder 2 to form spiral dense portions 1a and 1b, and the joining effect is the same as that described above. No change.

(Effects of the invention) As described above, in this invention, thick flanges projecting outward are provided at the upper and lower parts of the inner cylinder, and between the flanges and the outer cylinder, a chrysanthemum shaped material using a thin synthetic resin film is provided. By forming dense areas with deformed pleats at the upper and lower ends, when joining the end plates, the binder is distributed uniformly in each part without being concentrated in one part.
The connection with the end plate becomes reliable and strong, and the airtightness of the part can be maintained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of one embodiment of this invention. FIG. 2 is a perspective view of the end of the material including the inner and outer cylinders. FIG. 3 is a perspective view of the same part as FIG. 2 of another modification. FIG. 4A is a sectional view of a conventional element. Figure B is a perspective view of a part of the material. FIG. 3C is a sectional view showing how the material and the end plate are attached. In the figure, 1...material, 1a, 1b...dense area, 2
... Inner cylinder, 2a, 2b ... Flange portion, 3 ... Outer cylinder, 4, 5 ... End plate, 6 ... Binder, a ... Thin film, b ... Net cloth.

Claims (1)

[Scope of utility model registration request] A chrysanthemum-shaped cylindrical material is formed by overlaying a synthetic resin net cloth on the front and back of a porous thin film made of synthetic resin, and thick flanges made of synthetic resin that protrude outward on the top and bottom parts are attached to the inside of the material. A porous inner cylinder is arranged, a dense part with deformed folds is formed at the upper and lower ends of the material, and the upper and lower ends of the material are covered with dish-shaped end plates made of synthetic resin with a binder interposed. A chrysanthemum-shaped over-element using a resin thin film that is fitted and joined together.