JP2005205347A - Filter element capable of being subjected to incineration - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter element capable of being subjected to incineration, which can be applied for a large sized apparatus too by enhancing various performances of a filter element such as heat resistance, fuel resistance, chemical resistance, pressure strength property and cryogenic cycle property and, further, enhancing sealing property, productivity, durability and the like. <P>SOLUTION: The filter element capable of being subjected to incineration is provided with a combustible filtration body 1, a combustible inner cylinder 2 and a combustible end plate 3, wherein the end plate 3 contains a cured epoxy resin having a sea-island structure. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a filter element used in a filter for filtering fluid such as gas and liquid, and more particularly to a filter element capable of being incinerated for easy disposal after replacement.

  In recent years, when the filter has become clogged due to problems such as industrial waste or environmental pollution, the filter element has been removed from the filter for replacement and replaced. It is desirable to dispose of.

  For this reason, conventionally, it has a flammable filter body, a flammable inner cylinder, and a flammable end plate made of a material such as urethane resin, nylon resin, paper, etc. There is a technique that makes it possible to incinerate the entire filter element by fixing them together or integrally molding them (see, for example, Patent Documents 1 to 3).

According to such a conventional technique, the entire filter element can be incinerated without separating the filter element into a combustible material and a non-combustible material, and the disposal process becomes easy.
Shoko 58-30573 Utility Model 5-2707 Reality 3-50965

  However, conventional end plates made of urethane resin have a problem that their performance as a filter element is low, such as heat resistance, fuel resistance, chemical resistance, pressure strength, and heat cycle performance.

  In addition, the conventional nylon resin end plate has a problem in that it is difficult to melt the plate surface uniformly, so that the sealing performance is low and the productivity is poor.

  Further, the conventional paper end plate has a problem that the function of the element is easily lost due to external deformation and breakage, and the durability is low.

  Due to such problems, the filter element that can be incinerated by the prior art cannot be applied to large-sized products.

  Accordingly, the present invention improves various performances as a filter element, such as heat resistance, fuel resistance, chemical resistance, pressure strength, and thermal cycle performance, and further improves sealability, productivity, durability, and the like. Thus, an object of the present invention is to provide a filter element that can be applied to large-sized products and that can be incinerated.

  In order to solve the above-mentioned problems, the present invention provides an incineration-possible filter element comprising a flammable filter, a flammable inner cylinder, and a flammable end plate. The end plate has a sea-island structure. It contains an epoxy resin cured product.

  Furthermore, the present invention is characterized in that, in a filter element that can be incinerated, the end plate includes a gasket.

  Furthermore, the present invention is characterized in that the filter element that can be incinerated has stress control means on the end face or side face for suppressing stress generation due to thermal expansion, relaxing stress transmission, and promoting stress extinction. .

  The present invention may also be characterized in that, in the filter element that can be disposed of by incineration, the stress control means includes a protrusion on the end face.

  Further, the present invention may be characterized in that, in the filter element that can be incinerated, the stress control means includes a groove portion that can be deformed on a side surface.

  According to the present invention, the filter element that can be incinerated can be improved in various performances as a filter element, such as heat resistance, fuel resistance, chemical resistance, pressure strength, cold cycle performance, and further, sealing performance, production This can be applied to large products by improving the properties, durability and the like.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for carrying out an incineration-possible filter element according to the present invention will be described below with reference to the accompanying drawings.

=== First Embodiment ===
FIG. 1 is a cross-sectional view of a basic model showing a filter element that can be incinerated in one embodiment of the present invention, and includes a flammable filter body 1, a flammable inner cylinder 2, and a flammable end plate 3. The end plate 3 includes a cured epoxy resin having a sea-island structure.

  Here, the cured epoxy resin in the present invention is obtained by curing an epoxy resin. For example, an epoxy resin liquid molding material containing an epoxy resin, an epoxy resin curing agent, and an epoxy resin modifier is used. It is preferable to use a cured product. The epoxy resin liquid molding material may contain other components such as a diluent, a filler, a thickener, and a colorant. Moreover, it may mix | blend with 1 liquid type and may mix | blend with several liquid types, such as 2 liquid type.

  Further, examples of the epoxy resin include (1) bisphenols such as bisphenol A and bisphenol F and modified epoxy resins thereof, (2) polyfunctional compounds such as phenol novolac type and cresol novolak type, and modified epoxy resins thereof (3 ) Amines such as diaminodiphenylmethane and aniline and modified epoxy resins thereof; (4) Alcohol types such as trimethylolpropane and glycerin and modified epoxy resins thereof; (5) Alicyclics such as hexahydrophthalic acid and vinylcyclohexene; Examples thereof include modified epoxy resins, (6) flexibility such as polyethylene glycol and dimer acid, and modified epoxy resins thereof, and (7) heterocyclic such as isocyanurate and hydantoin and modified epoxy resins thereof. Any of these may be used, or a plurality of them may be used.

  Further, as the epoxy resin curing agent, for example, (1) polyamide obtained by reaction of dimer acid, polymerized fatty acid and the like with amines and a modified product thereof, and (2) dimer acid, polymerized fatty acid and the like and amines are used. (3) Aliphatic and modified amines such as triethylenetetramine and metaxylenediamine, and (4) Alicyclic and modified amines such as isophoronediamine and diaminodicyclohexylmethane, 5) Aromatics such as diaminodiphenylmethane and m-phenylenediamine and modified amines thereof, (6) Latent curing agents such as dicyandiamide and phenol novolac resins and modified products thereof, (7) Hexahydrophthalic anhydride, methyltetrahydrophthal Acid anhydrides such as acid anhydrides and modified products thereof, (8) 2 4,6-tris (dimethylaminomethyl) phenol, tertiary amines and their modified products such as imidazole, and the like. Any of these may be used, or a plurality of them may be used.

  Furthermore, examples of the epoxy resin modifier include (1) both-end carboxylated liquid butadiene rubber, both-end carboxylated liquid acrylonitrile-butadiene rubber and the like both-end carboxylated liquid rubber, and (2) both-end aminated liquid. Examples thereof include butadiene rubber, both-end aminated liquid acrylonitrile-butadiene rubber such as both-end aminated liquid rubber, (3) both-end vinylated liquid rubber, (4) core-shell type acrylic resin, and (5) engineering plastic. Any of these may be used, or a plurality of them may be used.

  Examples of the diluent include (1) oligomers such as toluene resin and xylene resin, (2) plasticizers such as phthalate ester and phosphate ester, (3) alcohols such as benzyl alcohol and methanol, (4 ) Non-reactive diluents such as solvents such as methyl ethyl ketone and toluene, (5) Monofunctional reactive diluents such as butyl glycidyl ether and 2-ethylhexyl glycidyl ether, (6) 1,4-butanediol diglycidyl ether, cyclohexane Bifunctional reactive diluents such as dimethanol diglycidyl ether, (7) Multifunctional reactive diluents such as glycerol triglycidyl ether, (8) Diols such as polyoxypropylene diol, (9) Polyoxypropylene triol, etc. Triols, and the like. Any of these may be used, or a plurality of them may be used.

  Examples of the filler include mineral fillers such as (1) calcium carbonate, (2) silica, fused silica and silica sand, (3) clay, (4) talc, (5) kaolin, and (6) graphite. Agents, (7) pulp, (8) short glass fibers, (9) fibrous fillers such as potassium titanate whiskers, and the like. Any of these may be used, or a plurality of them may be used.

  Examples of the thickener include (1) amorphous amorphous silica, (2) surface-treated bentonite, (3) surface-treated light calcium carbonate, and the like. Any of these may be used, or a plurality of them may be used.

  Examples of the colorant include (1) titanium oxide, (2) carbon black, (3) inorganic pigments such as yellow iron oxide, (4) azo series, (5) phthalocyanine series, and (6) condensed poly. Examples thereof include organic pigments such as ring systems, and (7) organic solvent-soluble dyes. Any of these may be used, or a plurality of them may be used.

  When such epoxy resin liquid molding material is cured, a phase separation phenomenon occurs at the time of curing, so that the epoxy resin modifier becomes an island component, and a sea island structure in which the periphery of the island component is bonded to the sea component by a functional group is formed. The

  In addition, the end plate 3 in the present invention may be fixed together with the combustible filter body 1 and the combustible inner cylinder 2 by an adhesive, heat melting, or the like, but it is preferable to integrally mold them.

  For example, an epoxy resin liquid molding material is poured into a mold or a resin mold, and a flammable filter body 1 and a flammable inner cylinder 2 (filter element tube) attached to the inner periphery thereof are inserted into the mold. The end plate 3, the filter body 1, and the inner cylinder 2 are integrally formed by curing together with these.

  Note that the end plate 3 may be provided on either the upper surface or the lower surface, or may be provided on both.

  Furthermore, since the cured epoxy resin in the present invention is flammable, the end plate 3 including this is also flammable. For this reason, the filter element in one embodiment of the present invention can be incinerated as a whole.

  In addition, since the cured epoxy resin in the present invention has improved heat resistance and chemical resistance due to higher crosslink density, and has a sea-island structure, it solves the lack of toughness and low-temperature properties in ordinary epoxy resins. For this reason, the filter element in one embodiment of the present invention has improved performances such as chemical resistance, pressure strength, and thermal cycle performance. Examples thereof will be shown below.

  First, in this example, an epoxy resin liquid molding material blended into a two-part type of liquid A and liquid B was prepared, and this was cured to produce an end plate, which was integrally formed with the filter body and the inner cylinder. A filter element was manufactured.

  Here, as liquid A, bisphenol A type epoxy resin (epoxy resin) 50.0 parts by weight, epoxy-modified liquid synthetic rubber (epoxy resin modifier) 20.0 parts by weight, heavy calcium carbonate (filler) 28 0.5 parts by weight, 1.0 part by weight of amorphous amorphous silica (thickener), and 0.5 parts by weight of carbon black (colorant) were mixed.

  In addition, as the liquid B, 14.0 parts by weight of polyamidoamine (epoxy resin curing agent), 10.0 parts by weight of both-terminal aminated liquid rubber (epoxy resin modifier), xylene / formaldehyde resin (diluent) 0 parts by weight, 30.5 parts by weight of heavy calcium carbonate (filler), and 0.5 parts by weight of amorphous amorphous silica (thickener) were mixed.

  An epoxy resin liquid molding material in which 100.0 parts by weight of such A liquid and 60.0 parts by weight of B liquid are mixed is poured into a mold, and a filter body equipped with an inner cylinder is inserted into the mold. After curing at 23 ° C. for 24 hours, it was further cured by heating at 80 ° C. for 30 minutes. In this way, a filter element in which an end plate was integrally formed on the axial end surfaces of the filter body and the inner cylinder was manufactured.

  Next, as a comparative example, similar to the present example, an epoxy resin liquid molding material blended in a two-component type of liquid A and liquid B is prepared, and this is cured to produce an end plate. And a filter element integrally formed with each other.

  Here, as A liquid, the thing with the same component and a weight part as a present Example was mixed. Moreover, as B liquid, the both terminal amination liquid rubber (epoxy resin modifier) was not included, but the other component and the weight part mixed the same thing as a present Example.

  An epoxy resin liquid molding material in which 100.0 parts by weight of such A liquid and 50.0 parts by weight of B liquid are mixed is poured into a mold, and a filter body equipped with an inner cylinder is inserted into the mold. After curing at 23 ° C. for 24 hours, it was further cured by heating at 80 ° C. for 30 minutes. In this way, a filter element in which an end plate was integrally formed on the axial end surfaces of the filter body and the inner cylinder was manufactured.

  With respect to the filter element of Example 1 and the filter element of Comparative Example 1 thus manufactured, the filter element was tested for light oil resistance, pressure strength, and thermal cycle performance.

  Here, the oil resistance test was performed by a method in which the pressure strength was confirmed after the sample was immersed in light oil at 80 ° C. for 400 hours. The pressure strength test was performed in oil at 80 ° C. according to an element differential pressure strength test (JIS D 1617). Further, the thermal cycle test was performed in air, and a cycle of −30 ° C. × 2 hours to + 80 ° C. × 2 hours was defined as one cycle, and this was repeated 20 cycles.

The results are shown in Table 1.

  As is clear from Table 1, it can be seen that the filter element of Example 1 of the present invention has improved pressure strength and cooling cycle performance as compared with the filter element of Comparative Example 1. This is considered to be due to the influence of the both-end aminated liquid rubber (epoxy resin modifier) contained in the epoxy resin liquid molding material of Example 1.

  Next, in this example, an epoxy resin liquid molding material blended into a two-part type of liquid A and liquid B is prepared, and this is cured to produce an end plate, which is integrally formed with the filter body and the inner cylinder. Filter elements were produced.

  Here, as liquid A, bisphenol A type epoxy resin (epoxy resin) 70.0 parts by weight, heavy calcium carbonate (filler) 28.5 parts by weight, amorphous amorphous silica (thickener) 1. 0 part by weight and 0.5 part by weight of carbon black (colorant) were mixed.

  Moreover, as B liquid, 17.0 weight part of polyamidoamine (epoxy resin hardening | curing agent), 8.0 weight part of both terminal amination liquid rubber (epoxy resin modifier), heavy calcium carbonate (filler) 14. 5 parts by weight and 0.5 parts by weight of amorphous amorphous silica (thickener) were mixed.

  An epoxy resin liquid molding material in which 100.0 parts by weight of such A liquid and 40.0 parts by weight of B liquid are mixed is poured into a mold, and a filter body equipped with an inner cylinder is inserted into the mold. After curing at 23 ° C. for 24 hours, it was further cured by heating at 80 ° C. for 30 minutes. In this way, a filter element in which an end plate was integrally formed on the axial end surfaces of the filter body and the inner cylinder was manufactured.

  Next, as a comparative example, similar to the present example, an epoxy resin liquid molding material blended in a two-component type of liquid A and liquid B is prepared, and this is cured to produce an end plate. And a filter element integrally formed with each other.

  Here, as A liquid, the thing with the same component and a weight part as a present Example was mixed. Moreover, as B liquid, the both terminal amination liquid rubber (epoxy resin modifier) was not included, but the other component and the weight part mixed the same thing as a present Example.

  An epoxy resin liquid molding material in which 100.0 parts by weight of such A liquid and 32.0 parts by weight of B liquid are mixed is poured into a mold, and a filter body equipped with an inner cylinder is inserted into the mold. After curing at 23 ° C. for 24 hours, it was further cured by heating at 80 ° C. for 30 minutes. In this way, a filter element in which an end plate was integrally formed on the axial end surfaces of the filter body and the inner cylinder was manufactured.

  The filter element of Example 2 and the filter element of Comparative Example 2 manufactured in this manner were each subjected to performance tests for light oil resistance, engine oil resistance, pressure strength, and cooling and cycling characteristics.

  Here, the light oil resistance test was performed in the same manner as in Example 1. Further, in the engine oil resistance test, a sample was immersed in oil at 135 ° C. for 96 hours in accordance with an element differential pressure strength test (JIS D 1611) after immersion at a high oil temperature, and this was repeated two cycles. Furthermore, the pressure strength test was performed in 120 ° C. oil in accordance with an element differential pressure strength test (JIS D 1611). Further, the thermal cycle test was performed in the same manner as in Example 1.

The results are shown in Table 1.

  As is clear from Table 2, it can be seen that the filter element of Example 2 in the present invention has improved pressure strength and cooling cycle performance as compared with the filter element of Comparative Example 2. This is considered to be due to the influence of the both-end aminated liquid rubber (epoxy resin modifier) contained in the epoxy resin liquid molding material of Example 2.

  Next, in this example, an epoxy resin liquid molding material blended into a two-part type of liquid A and liquid B is prepared, and this is cured to produce an end plate, which is integrally formed with the filter body and the inner cylinder. Filter elements were produced.

  Here, as liquid A, bisphenol A type epoxy resin (epoxy resin) 65.0 parts by weight, crystalline silica (filler) 34.0 parts by weight, amorphous amorphous silica (thickener) 0.5 parts by weight Part and carbon black (colorant) 0.5 part by weight were mixed.

  Moreover, as B liquid, 11.0 weight part of polyamidoamine (epoxy resin hardening | curing agent), modified | denatured aromatic amine (epoxy resin hardening | curing agent) 3.5 weight part, both terminal amination liquid rubber | gum (epoxy resin modifier) ) 7.0 parts by weight, 18.0 parts by weight of crystalline silica (filler) and 0.5 parts by weight of amorphous amorphous silica (thickener) were mixed.

  An epoxy resin liquid molding material in which 100.0 parts by weight of such A liquid and 40.0 parts by weight of B liquid are mixed is poured into a mold, and a filter body equipped with an inner cylinder is inserted into the mold. After curing at 23 ° C. for 24 hours, it was further cured by heating at 80 ° C. for 30 minutes. In this way, a filter element in which an end plate was integrally formed on the axial end surfaces of the filter body and the inner cylinder was manufactured.

  Next, as a comparative example, similar to the present example, an epoxy resin liquid molding material blended in a two-component type of liquid A and liquid B is prepared, and this is cured to produce an end plate. And a filter element integrally formed with each other.

  Here, as A liquid, the thing with the same component and a weight part as a present Example was mixed. Moreover, as B liquid, the both terminal amination liquid rubber (epoxy resin modifier) was not included, but the other component and the weight part mixed the same thing as a present Example.

  An epoxy resin liquid molding material in which 100.0 parts by weight of such A liquid and 33.0 parts by weight of B liquid are mixed is poured into a mold, and a filter body equipped with an inner cylinder is inserted into the mold. After curing at 23 ° C. for 24 hours, it was further cured by heating at 80 ° C. for 30 minutes. In this way, a filter element in which an end plate was integrally formed on the axial end surfaces of the filter body and the inner cylinder was manufactured.

The filter element of Example 3 and the filter element of Comparative Example 3 manufactured as described above were subjected to performance tests for water resistance and pressure strength.
Here, the water resistance test was performed by immersing the sample in 2% water gas oil at 50 ° C. for 400 hours. Further, a test was conducted in which the sample was immersed in 2% water oil at 50 ° C. for 96 hours. The pressure strength test was performed in 120 ° C. oil in accordance with an element differential pressure strength test (JIS D 1611).

The results are shown in Table 3.

  As is apparent from Table 3, it can be seen that the pressure resistance strength of the filter element of Example 3 in the present invention was improved as compared with the filter element of Comparative Example 3. This is considered to be due to the influence of the both-end aminated liquid rubber (epoxy resin modifier) contained in the epoxy resin liquid molding material of Example 3.

=== Second Embodiment ===
FIG. 2 is a cross-sectional view showing a filter element according to an embodiment of the present invention, and the end plate 3 includes a gasket 4.

  Here, the gasket 4 in the present invention may be nonflammable as long as it is removable from the filter element, but is preferably flammable from the viewpoint of enabling incineration without being removed.

  Further, the gasket 4 may be fitted into the end plate 3 and may be fixed together with the end plate 3 by an adhesive, heat melting or the like, but these are integrally formed from the viewpoint of enhancing the sealing performance. It is preferable.

  At this time, the gasket 4 may be integrally formed with the end plate 3 and then the filter body 1 and the inner cylinder 2 may be integrally formed. However, from the viewpoint of reducing the number of steps and working efficiency, these are integrated at the same time. It is preferable to form.

  For example, the gasket 4 is mounted on a mold or a resin mold, an epoxy resin liquid molding material is cast thereon, and the flammable filter body 1 and the flammable inner cylinder 2 mounted on the inner periphery thereof. And the filter body 1, the inner cylinder 2, and the gasket 4 are integrally formed by inserting and curing.

  The gasket 4 may be provided on one or both of the upper end surface and the lower end surface of the end plate 3. Moreover, any type, such as a grommet type and a packing type, may be used, and a plurality of types may be used.

  Furthermore, when the gasket 4 in the present invention is flammable, the end plate 3 provided with the gasket 4 is also flammable. For this reason, the filter element in one embodiment of the present invention can be incinerated as a whole.

  Moreover, the gasket 4 in the present invention prevents the mixing of the filtered fluid and the unfiltered fluid, and is inexpensive. For this reason, the filter element in one Embodiment of this invention improves a sealing performance and productivity. Examples thereof will be shown below.

  In this example, a filter element having a gasket on the end plate was manufactured by the following method.

  First, an epoxy resin molding material having the same components as in Example 1 was poured into a mold in which a gasket was previously mounted, and a filter body with an inner cylinder was inserted into the mold and cured at 23 ° C. for 24 hours. Furthermore, it was cured by heating at 80 ° C. for 30 minutes. In this way, a filter element in which the filter body and the inner cylinder, the end plate and the gasket were integrally formed was manufactured.

In Comparative Example 4 (a), a filter element was manufactured under the same conditions as in Example 4, and a gasket was fitted therein.
Further, in Comparative Example 4 (b), a filter element was produced under the same conditions as in Example 4, and a gasket was fixed thereto with a solvent nitrile rubber adhesive.

  Each of the filter element of Example 4 and the filter element of Comparative Example 4 (a) and Comparative Example 4 (b) produced in this manner was tested for sealing properties. Here, the sealing property test followed a bubble test (JIS K 2204).

The results are shown in Table 4. Table 4 also shows productivity.

  As is clear from Table 4, it can be seen that the filter element of Example 4 has improved sealing performance and productivity as compared with the filter elements of Comparative Example 4 (a) and Comparative Example 4 (b). This is considered because the filter element of Example 4 was provided with the gasket integrally formed with the end plate.

=== Third embodiment ===
FIG. 3 is a cross-sectional view showing a filter element according to an embodiment of the present invention. The inner cylinder includes stress control means for suppressing stress generation due to thermal expansion, relaxing stress transmission, and promoting stress extinction. It is on the end face or side face. Specifically, as the stress control means, the protrusion 5 is provided on the end surface of the inner cylinder 2, and the deformable groove 6 is provided on the side surface of the inner cylinder 2.

  Here, the stress control means in the present invention may be one in which a concave hole or groove is carved on the end surface of the inner cylinder, but the contact area between the inner cylinder 2 and the end plate 3 is reduced, and thermal expansion causes From the viewpoint of suppressing stress generation, relaxing stress transmission, and promoting stress extinction, it is preferable that the end surface of the inner cylinder 2 has a protruding portion 5 such as a convex shape.

  In addition, the stress control means in the present invention can be deformed as long as it absorbs and relaxes stress due to thermal expansion on the side surface of the inner cylinder 2, and can be deformed. Any shape such as a polygonal shape, a circular shape, an elliptical shape, or a long hole shape may be used, but a shape having a deformable groove portion 6 is preferable.

  Further, the stress control means in the present invention is preferably flammable from the viewpoint of enabling the entire filter element to be incinerated.

  Moreover, although the stress control means in this invention may be provided only with any one of the projection part 5 and the groove part 6, it is preferable that both are provided.

  Here, the protrusion 5 in the present invention may have any form such as continuous or discontinuous, but from the viewpoint of preventing deformation and breakage of the filter element due to stress, the center of the end face of the inner cylinder 2 is used. On the other hand, it is preferable to arrange regularly and symmetrically on the outer periphery of the end face so that the stress is evenly distributed.

  Moreover, although the protrusion part 5 in this invention is not specifically limited, such as a shape, a magnitude | size, a number, a raw material, It is preferable that it is combustible from a viewpoint of enabling incineration disposal.

  Here, the groove portion 6 in the present invention may be in any form of continuous or discontinuous, but from the viewpoint of preventing deformation of the filter element due to stress, it is on the side surface with respect to the axis of the inner cylinder 2. Are preferably arranged in a regular and symmetrical manner, and the stress is evenly distributed.

  The position of the groove 6 may be any position as long as it is a side surface of the inner cylinder 2, but as shown in FIG. 3, it should be provided at a position immediately below the end face close to the end face of the inner cylinder 2. preferable.

  In addition, although the stress control means in the present invention may be fixed together with the inner cylinder 2 by an adhesive, heat melting or the like, it is preferable to integrally form them.

  Furthermore, when the stress control means in the present invention is flammable, the inner cylinder 2 having this is also flammable. For this reason, the filter element in one embodiment of the present invention can be incinerated as a whole.

  Moreover, the inner cylinder 2 in the present invention has stress control means on the end face or side face, suppresses the generation of stress due to thermal expansion, relaxes stress transmission, and promotes the disappearance of stress. For this reason, the filter element in one embodiment of the present invention is prevented from being deformed or damaged in appearance, and further, the function of the element is maintained and the durability is improved. Examples thereof will be shown below.

  First, in this embodiment, an epoxy resin molding material having the same components as in Embodiment 2 is cast into a mold, and a filter body equipped with an inner cylinder having stress control means of the present invention is inserted into the mold. Heat-cured at 10 ° C. for 10 minutes. In this way, a filter element in which an end plate was integrally formed on the axial end surfaces of the filter body and the inner cylinder was manufactured. Here, the stress control means includes a protrusion on the end surface of the inner cylinder, and further includes a deformable groove on the side surface of the inner cylinder.

  On the other hand, in the comparative example, an epoxy resin molding material having the same components as in Example 2 is cast into a mold, and a filter body in which an inner cylinder that does not have the stress control means of the present invention is inserted is inserted into the mold. And cured by heating at 130 ° C. for 10 minutes. In this way, a filter element in which an end plate was integrally formed on the axial end surfaces of the filter body and the inner cylinder was manufactured.

  Next, the filter element of Example 5 and the filter element of Comparative Example 5 were each tested for the appearance deformation and breakage of the end plate, and the functionality of the end plate was examined.

  Here, the test method of appearance deformation and breakage of the end plate was carried out in accordance with an element differential pressure strength test (JIS D 1611) by immersing a sample in oil at 120 ° C. and performing a differential pressure strength test.

The results are shown in Table 5.

  As is apparent from Table 5, it can be seen that the filter element of Example 5 is less susceptible to external deformation and breakage than the filter element of Comparative Example 5, and has improved durability. This is presumably because the filter element of Example 5 was provided with a protrusion on the inner cylinder end face and a deformable groove on the inner cylinder side as stress control means.

It is sectional drawing of the basic model which shows the filter element which can be incinerated in one Embodiment of this invention. It is sectional drawing of the model which shows the filter element which can be incinerated and which provided the end plate with the gasket in one Embodiment of this invention. It is sectional drawing of the model which shows the filter element which can carry out the incineration disposal which has a stress control means in the inner cylinder in one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filter body 2 Inner cylinder 3 End plate 4 Gasket 5 Protrusion part 6 Groove part

Claims (5)

In a filter element that can be incinerated with a flammable filter body, a flammable inner cylinder, and a flammable end plate,
The end plate is
A filter element capable of being incinerated, comprising a cured epoxy resin having a sea-island structure. The end plate is
The filter element capable of being incinerated according to claim 1, further comprising a gasket. The inner cylinder is
3. A filter element capable of incineration according to claim 1 or 2, comprising stress control means on the end face or side face for suppressing stress generation due to thermal expansion, relaxing stress transmission, and promoting stress extinction. . The stress control means includes
The filter element according to claim 3, wherein the end surface is provided with a protrusion. The stress control means includes
4. A filter element capable of being incinerated according to claim 3, further comprising a deformable groove on the side surface.

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