JP2008298178A - Piping member made of resin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two-part liquid reaction type piping member made of a resin excellent in chemical resistance, heat resistance, solvent resistance, oil resistance and low elution performance of an organic material and a metal ion, and also an impact resistance strength. <P>SOLUTION: A flow path 8 is formed inside a valve body 1 made of a hollow cylindrical two-part liquid reaction type resin (DCPD), a roughly disc-shaped top flange 6 extruded to the outer periphery is provided on the top, a bearing recessed part 7 keeping the lower end part of a system 4 inserted is provided on the bottom, a seat ring 2 made of a hollow cylindrical FKM is formed on the inner circumference surface of the valve body 1 so as to be integrated with the valve body 1, the upper end part of the system 4 made of SUS 403 turnably supported by the valve body 1 and the seat ring 2 is placed so as to be protruded from the center of the top flange 6 provided on the top of the valve body 1, the lower end part is inserted into the bearing recessed part 7 to be fixed to the warm wheel 9 of the gear box of a valve operation device, and a valve element 5 made of a circular PVDF is placed in the center inside the valve body 1 to be attached to the system 4 passed through the center of the valve element 5 so as not to be turnable. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a resin piping member used in various fields such as chemical, iron making, paper / pulp, foodstuffs, pharmaceuticals, and more specifically, chemical resistance, heat resistance, solvent resistance, oil resistance. The present invention relates to a two-component reaction type resin piping member that is excellent in at least one of low elution properties of organic substances and metal ions and excellent in impact strength.

  Resin piping members are manufactured using various resins, depending on the usage and purpose such as the type of fluid that flows inside the piping members, the environmental conditions in which the piping members are used, or the required service life of the piping members. Selected.

  For example, as resin piping members through which tap water flows inside the piping members, piping members made of vinyl chloride resin or ethylene resin are selected and used, and chemicals used in the chemical industry such as acid and alkaline aqueous solutions are used. As the flowing resin piping member, a piping member made of vinylidene fluoride resin or propylene resin is selected and used.

  As described above, resin piping members can be used safely for a longer period of time by selecting and using fluids, usage conditions, usage environment, etc. Can be improved.

  However, compared with metal piping members, resin piping members are more resistant to impact stresses such as water hammers caused by changes in the pressure of fluid flowing inside and earthquake waves generated during burial use, that is, impact resistance performance. May be inferior. For this reason, resin-made piping members are in widespread use, but there is also concern about breakage when subjected to impact stress. This tendency is particularly strong in the field where large-diameter piping members are used. Furthermore, there are similar concerns when the ambient temperature and fluid temperature are low.

  As a solution, it has been proposed to improve impact resistance performance by blending a resin and an elastomer component forming a resin piping member, or by graft polymerization of an elastomer component to the resin (for example, Patent Document 1). reference). According to the method disclosed in this document, a resin piping material is prepared by mixing a resin and an elastomer component forming a pipe at a specific ratio, or by graft-polymerizing an elastomer component at a specific ratio on the resin forming the pipe. The impact resistance can be imparted to the material.

  However, even if it is possible to develop good impact resistance by adding the elastomer component, there has been a problem that the addition of the elastomer component causes a decrease in the elastic modulus and chemical resistance of the resin. In addition, the elastomer component cannot be easily and uniformly dispersed in any resin, and there is a problem that the resin that can be used for the resin piping member is limited.

  On the other hand, in recent years, a piping member using a two-component reactive resin having high impact resistance has been proposed (for example, see Patent Document 2). According to this document, a tubular body that can withstand a local impact such as pickaxe impact can be obtained by forming the tubular body from a norbornene-based resin such as dicyclopentadiene resin that is a two-component reactive resin.

  As described above, the two-component reactive resin can be used as a resin for piping members that are required to have impact resistance. By using two-component reactive resin for resin piping members, it is possible to manufacture piping members with high impact resistance, so large diameters that have been concerned about piping damage due to various shock waves, etc. Expansion into the plumbing field is expected.

JP-A-11-108273 JP 2001-241575 A

  However, although the two-component reaction type resin piping member can be suitably used in the agricultural water field, the seawater field, etc., for example, as a piping member for ultrapure water in the field of semiconductors and liquid crystals, there is a problem in elution. In addition, there is a problem in chemical resistance as a piping member for a chemical solution such as for high-concentration acid in fields such as iron making and chemistry.

  A two-component reaction type resin molded product can be obtained by increasing the molecular weight of a low molecular weight substance such as a monomer, dimer, or trimer using a catalyst or an activator. A low molecular weight substance is contained unreacted. Since this low molecular weight substance is eluted into the fluid and the total organic carbon value of the fluid increases, it becomes unsuitable as a piping member for ultrapure water.

  In addition, since the two-component reactive resin has a large number of polar sites in the chemical structure after reaction curing, when the fluid flowing inside the pipe is a polar solvent or a chemical solution, easily influenced. In particular, when the fluid is strongly acidic, the influence becomes extremely large. For this reason, when the fluid acts on the polar part of the two-component reactive resin, the two-component reactive resin has insufficient solvent resistance, chemical resistance, etc., and the piping member deteriorates. Use in is unsuitable.

  The present invention has been made in view of the problems of the prior art as described above, and its purpose is excellent in chemical resistance, heat resistance, solvent resistance, oil resistance, low elution of organic matter and metal ions, And it is providing the piping material made from a 2 liquid reaction type resin excellent in impact strength strength.

  The structure of the present invention will be described with reference to the drawings. The non-wetted part is made of a two-component reaction type resin, and at least one of the chemical resistance, solvent resistance, and low elution property of the physical property of the wetted part is The first feature is that it is made of a resin and / or rubber superior to the non-wetted part and is integrally formed with the non-wetted part.

  The liquid contact part is at least one of vinyl resin, olefin resin, fluorine resin, aromatic resin, urea resin, saturated rubber, unsaturated rubber, fluorine rubber, siloxy acid rubber, or A second feature is that it is made of at least one of these alloy blend composite materials.

  A third feature is that the non-wetted part is molded by any one of reaction injection molding, resin transfer molding, infusion molding, and injection molding.

  A fourth feature is that the coating applied to the surface of the non-wetted part is excellent in at least one physical property of chemical resistance, solvent resistance, oil resistance, and weather resistance.

  A fifth feature is that the resin piping member is a valve, a joint, or a pipe.

  The valve is configured by a substantially disc-shaped or substantially spherical valve body, an annular seat ring disposed on the inner peripheral surface of the valve body, and a stem disposed substantially perpendicular to the axis of the flow path, The valve body rotates with the rotation of the stem, and the valve body presses and separates from the seat ring to shut off and open the flow path, and the member of the liquid contact part is the seat ring This is the sixth feature.

  A seventh feature is that the stem is rotated by any one of a manual type, an electric type and a pneumatic type drive.

  The valve has a valve box having an inlet in the lower part and an opening in the upper part, and a communication port in the upper part and a water inlet in the upper part between the outer peripheral surface and the inner peripheral surface of the valve box. A guide tube with a bottom provided with a flow gap, a lid mounted on the opening of the valve box and sandwiching the guide cylinder between the valve box and having a large-diameter air hole in the center, and the guide cylinder A floating valve body provided in the guide cylinder and having a small-diameter air hole and closing the large-diameter air hole in the lid at an upper limit position; An air valve comprising a float valve body that closes a small-diameter air hole, wherein at least one of the valve box, the guide tube, the lid body, the floating valve body, and the float valve body is the liquid contact portion. And the non-wetted part is an eighth feature.

  The two-component reactive resin forming the non-wetted part is not particularly limited, and examples thereof include dicyclopentadiene resin (hereinafter referred to as DCPD), urethane resin, nylon resin, and the like, and dicyclopentadiene resin is particularly preferable. The two-component reactive resin forming the non-wetted part preferably has a notched Izod impact strength at 0 ° C. of 10 kJ / m 2 or more, and a notched Izod impact strength at 0 ° C. of 15 kJ / m 2 or more. Is more preferable.

  The resin and / or rubber forming the wetted part is a vinyl-based resin that is superior in chemical resistance, solvent resistance, and low elution, compared to the resin forming the non-wetted part, Olefin resin, fluorine resin, aromatic resin, urea resin, saturated rubber, unsaturated rubber, fluorine rubber, siloxy acid rubber, or any of these alloy blend composite materials Is not particularly limited, for example, vinyl chloride resin (hereinafter referred to as PVC), chlorinated vinyl chloride resin, chlorinated polyethylene resin, vinylidene chloride resin, propylene resin (hereinafter referred to as PP), tetrafluoroethylene resin ( (Hereinafter referred to as PTFE), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene / hexafluoro Lopylene copolymer, ethylene / tetrafluoroethylene copolymer, vinylidene fluoride resin (hereinafter referred to as PVDF), polychlorotrifluoroethylene resin (hereinafter referred to as PCTFE), ethylene / chlorotrifluoroethylene copolymer, Natural rubber, isoprene rubber, chloroprene rubber, butadiene rubber, styrene butadiene rubber, acrylonitrile butadiene rubber, hydrogenated nitrile rubber, vulcanized rubber of acrylonitrile-butadiene rubber / polyvinyl chloride blend material, urethane rubber, acrylic rubber, ethylene propylene rubber, Butyl rubber, chlorinated butyl rubber, brominated butyl rubber, chlorosulfonated polyethylene (hereinafter referred to as CSM), chlorinated polyethylene, fluoro rubber (hereinafter referred to as FKM), perfluoro rubber, epichlorohydrin rubber Silicone rubber, or fluorosilicone silicone rubber, or it can include any of these alloys blend composite material. The resin is processed into a shape suitable for the member of the wetted part by a molding method such as injection molding, extrusion molding, compression molding, transfer molding, or a processing method such as flare processing.

  The two-component reactive resin is preferably formed by any one of reaction injection molding (hereinafter referred to as RIM), resin transfer molding (hereinafter referred to as RTM), infusion molding, and injection molding. RIM is more preferred. RIM includes casting methods such as S-RIM and R-RIM. In the molding of the two-component reactive resin by RIM, the pressure for injecting the raw material into the mold at the time of molding is about 1/30 to 1/500 of the injection molding. For this reason, the filling property into the mold is very good, and various shapes can be easily formed. Moreover, since it has the characteristic that the shaping | molding in a normal temperature range is possible, it is possible to make the said non-wetted part and the said wetted part easily integral molding. S-RIM and R-RIM are molding methods for obtaining RIM molded products having a high elastic modulus, but S-RIM is a method for performing RIM after setting preforms formed of various materials in a mold. , R-RIM is a method in which RIM is performed after various fillers are mixed in advance with raw materials.

  Further, as described above, the molding with the two-component reactive resin by RIM has a feature that the internal pressure generated in the mold is very small because the injection pressure into the mold is very small. For this reason, compared with the metal mold | die used for injection molding, the intensity | strength requested | required of a type | mold will be reduced significantly, and design of a type | mold will become easy. For this reason, it is easy to design a mold for a large molded product, and it is also easy to develop a large-diameter piping member in which it is difficult to deploy the resin-made piping member.

  In the present invention, it is desirable that the main body is coated with at least one of chemical resistance, solvent resistance, oil resistance, and weather resistance. As described above, the two-component reactive resin has a portion that is susceptible to chemical influences, and therefore tends to be easily influenced by polar solvents, chemical solutions, and the like. For this reason, when the environmental atmosphere in which the resin pipe member is installed and used is in an acidic gas atmosphere, or when oil mist is scattered, it is desirable that a coating suitable for the environment in which the resin pipe member is installed and used is formed. . Even if the environment where it is installed and used is daily, it may be affected by atmospheric heat, ultraviolet rays, oxygen, ozone, etc. in the long term. Although there is no influence on the product performance, since the deterioration of the design property or the like occurs, for example, it is desirable that the coating has weather resistance. In addition, when used in semiconductor-related equipment that requires environmental cleanliness, the environmental cleanliness deteriorates due to the scattering of gases emitted from the resin piping members and trace amounts of carbides generated by environmental degradation. Therefore, it is desirable that the paint is suitable for the usage environment.

  In addition, examples of the piping member include not only a valve, a joint, and a pipe but also a piping member such as a driving member.

  The resin-made piping member of the present invention can form an optimum member for the wetted part according to the type and application of the fluid, and the non-wetted part does not come into contact with the fluid. Provided is a resin piping member that can impart the impact resistance of a resin to a piping member and has a wetted part excellent in at least one of chemical resistance, solvent resistance, and low elution Is possible.

  The resin piping member of the present invention is a two-component reactive resin that expresses stable impact resistance in a wide temperature range, and an optimal wetted part member that can be arbitrarily selected depending on the application and field in which the piping member is used. Since it is comprised, it is suitable as a piping member of all uses and fields.

  This invention is a piping member of the above structures and manufacturing methods, and the following outstanding effects are acquired by this.

(1) Although an impact such as a water hammer is applied to the piping member at the time of use, since the main body is formed of a two-component reaction resin, it has excellent impact resistance.
(2) The liquid contact part is composed of a resin and / or rubber member that is excellent in at least one of chemical resistance, heat resistance, solvent resistance, oil resistance, and low elution, and is an optimal member for fluids It is possible to use it for every use by comprising a wetted part.
(3) Since any one of RIM, RTM, infusion molding, and injection molding can be selected as the molding method of the two-component reaction resin, it is possible to mold any shape, size and quantity. In particular, since conventional resin piping members are manufactured by injection molding or extrusion molding, it was not possible to obtain a very large molded product, but RIM, RTM, infusion molding using a two-component reactive resin. Therefore, it is possible to provide a piping member that could not be provided by resin so far.
(4) The surface of the non-wetted part is coated with a coating that is excellent in at least one of chemical resistance, solvent resistance, oil resistance, and weather resistance. It can be used in various environments such as the seawater field such as industries and aquariums, and outdoor use fields where strong ultraviolet rays fall.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Needless to say, the present invention is not limited to the embodiments. FIG. 1 is a perspective view showing a closed state of a valve according to a first embodiment of the present invention. FIG. 2 is a longitudinal sectional view of FIG. FIG. 3 is a longitudinal sectional view showing a state in which the bearing recess into which the lower end portion of the stem is inserted is penetrated in FIG. 4 is a longitudinal sectional view showing a state in which an intermediate layer is provided between the wetted part and the non-wetted part in FIG. FIG. 5 is a longitudinal sectional view showing a state in which the intermediate layer is formed in a part between the wetted part and the non-wetted part in FIG. 6 is a longitudinal sectional view showing a state in which the stem is divided into two parts in FIG. FIG. 7 is a longitudinal sectional view showing an open state of the air valve according to the second embodiment of the present invention. FIG. 8 is a longitudinal sectional view showing a closed state of the air valve of FIG. FIG. 9 is a longitudinal sectional view of a joint which is a third embodiment of the present invention. FIG. 10 is a longitudinal sectional view showing a pipe according to a fourth embodiment of the present invention.

  A valve according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2, reference numeral 1 denotes a hollow cylindrical DCPD valve body, in which a flow path 8 is formed. A substantially disk-shaped top flange 6 protruding to the outer periphery is provided at the upper part, and a bearing concave part 7 into which the lower end part of the stem 4 described later is fitted is provided at the lower part. The bearing recess 7 is a substantially cylindrical bearing having a concave recess inside. The bearing recess 7 may be configured to penetrate and cover (see FIG. 3). In the present embodiment, the material of the valve body 1 is DCPD, but is not particularly limited as long as it is a two-component reaction type resin.

  A hollow cylindrical FKM seat ring 2 is formed integrally with the valve body 1 on the inner peripheral surface of the valve body 1. Moreover, the structure which has the intermediate | middle layer 3 between the seat ring 2 and the valve main body 1 may be sufficient (refer FIG. 4). The intermediate layer 3 may have a structure that forms a part between the seat ring 2 and the valve body 1 (see FIG. 5), and if the intermediate layer 3 is disposed between the seat ring 2 and the valve body 1, The shape and position are not particularly limited.

  4 is a stem made of SUS403. The upper end portion of the stem 4 is disposed so as to protrude from the center of a top flange 6 provided on the upper portion of the valve body 1 and is fixed to a worm wheel 9 of a gear box that is a valve operating device. The stem 4 is supported by the valve body 1 and the seat ring 2 in a rotatable state. Further, the lower end portion is fitted into the bearing recess 7. The stem 4 may be divided into an upper end portion and a lower end portion (see FIG. 6), and a structure in which the valve body 5 described later rotates with the rotation of the stem and serves as a support shaft of the valve body. If it is, it will not specifically limit.

  Reference numeral 5 denotes a circular valve body made of PVDF, which is arranged at the center inside the valve body 1. It is attached to a stem 4 that passes through the center of the valve body 5 so as not to rotate.

  Next, the operation of this embodiment will be described.

  In the state of FIG. 1, when the handle 12 is rotated to the left, the shaft 11 that passes through the handle so as not to rotate is rotated with the rotation of the handle 12, and the worm 10 is similarly rotated. The rotation of the worm 10 rotates the worm wheel 9 via the gear structure, the valve body 5 rotates through the stem 4 fixed to the worm wheel 9, and the outer periphery of the valve body 5 is separated from the seat ring 2. The flow path 8 is opened and the valve is opened. When the handle 12 is rotated to the right in the open state, the valve body 5 is rotated via the stem 4, the outer periphery of the valve body 5 is pressed against the seat ring 2, the flow path 8 is shut off, and the valve Closed.

  In the above embodiment, the manual type resin valve has been described based on FIGS. 1 to 6, but the operation may be an automatic type such as an air type or an electric type.

  Next, as an example of a method for producing the two-component reaction resin piping member of the present embodiment, a method for producing a valve having an inner diameter of 100 mm is described below.

(1) A sheet ring having an inner diameter of 100 mm and a thickness of 10 mm is molded using an injection mold for FKM molding, using FKM used as a member of the wetted part. The seat ring is formed in a shape necessary to be formed integrally with the valve body.
(2) The FKM seat ring obtained in (1), which is a member of the liquid contact portion, is fixed to the two-component reactive resin molding die so as to be a flow path of the valve body, and the die is closed.
(3) In the state of (2), DCPD mixed and started to react is poured into a mold and cured to obtain a valve body integrated with a seat ring which is a member of the liquid contact part.
(4) The valve body obtained in (3) is assembled with parts such as the valve body, stem, and drive unit to obtain a two-component reaction type resin valve.

  An air valve according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a longitudinal sectional view showing an open state of the air valve of the present invention. FIG. 8 is a longitudinal sectional view showing a closed state of the air valve of the present invention. In FIG. 7, reference numeral 13 denotes a non-wetted part of the valve box formed of a substantially cylindrical DCPD having an inlet 15 at the bottom and an opening at the top. In this embodiment, the valve box is composed of a non-wetted part and a later-described wetted part. In this embodiment, the material of the valve box non-wetted portion 13 is DCPD, but is not particularly limited as long as it is a two-component reaction type resin.

  Reference numeral 14 denotes a valve box wetted part formed of PTFE that forms the liquid contact surface of the valve box, and is formed integrally with the valve box non-wetted part 13. In this embodiment, the material of the valve box wetted part 14 is PTFE, but it is not particularly limited as long as it is made of resin and / or rubber, or an alloy blend composite material thereof.

  Reference numeral 16 denotes a PVC bottomed cylindrical guide cylinder mounted inside the valve box. Reference numeral 17 denotes a flow passage gap formed by the inner peripheral surface of the valve box and the outer peripheral surface of the guide cylinder 16.

  A communication port 18 communicates the inside of the guide tube 16 and the flow passage gap 17. A liquid introduction port 19 communicates the inside and the outside of the guide tube 16. At the bottom of the inner surface of the guide tube 16, four protrusions 20 serving as holding portions for the float valve body 25 described later are provided at intervals of 90 degrees in the axial direction around the liquid introduction port 19.

  Reference numeral 21 denotes a PVC lid attached to the upper opening of the valve box, and a large-diameter air hole 22 for exhausting a large amount of air is provided at the center of the lid 21.

  A floating valve body made of PP is mounted in the guide tube 16 so as to be movable up and down. A central portion of the floating valve body 23 is provided with a small-diameter air hole 24 for performing a small amount of intake and exhaust. . The floating valve body 23 is formed in a shape that includes substantially half of the float valve body 25 described later.

  Reference numeral 25 denotes a PP float valve body, which is mounted inside the guide tube 16 so as to be movable up and down below the floating valve body 23 and closes the small-diameter air hole 24 of the floating valve body 23 at its upper limit position. The float valve body 25 is supported in contact with the ridge 20 of the guide tube 16 when the valve is opened, so that the liquid introduction port 19 is not blocked. That is, the inside of the liquid introduction port 19 and the guide tube 16 is in a communication state. The shape of the float valve body 25 is formed in a spherical shape, but is not particularly limited to this shape, and is formed in a cylindrical shape with a flat upper surface, an inverted truncated cone shape, an inverted cone shape, or the like. Also good.

  26 is a seat-like valve seat made of ethylene propylene rubber, which is located on the outer peripheral side of the large-diameter air hole 22 and fitted and attached to the lower surface of the lid 21.

  Reference numeral 27 denotes a PVC cover that is mounted on the upper side of the lid 21 and has a size that sufficiently covers the large-diameter air hole 22.

  Next, the operation of this embodiment will be described. FIG. 7 shows a state where liquid passage is not performed in the pipeline. In this state, the floating valve body 23 and the float valve body 25 are in the lower part in the guide tube 16.

When liquid flow into the pipe line is started from this state, the air in the pipe line passes through the flow path gap 17 from the inflow port 15, passes through the communication port 18 of the guide tube 16, and has a large-diameter air hole 22. Discharged from the outside.
Next, when the liquid in the pipe flows into the valve box from the inflow port 15 as the exhaust action proceeds, most of the liquid proceeds to the flow passage gap 17 and at the same time, a part of the liquid is in the bottom of the guide tube 16. It flows from the liquid introduction port 19 into the guide tube 16. As the water flows in, the air inside the valve box is discharged from the large-diameter air hole 22 to the outside.

  On the other hand, as the liquid level of the liquid flowing into the guide cylinder 16 increases, the float valve body 25 and the floating valve body 23 rise due to the buoyancy and dynamic pressure of the liquid. When the liquid level reaches until the air is almost completely discharged from the inside of the valve box, the floating valve body 23 comes into contact with the valve seat 26 provided at the lower part of the lid body 21 and is pressed as shown in FIG. , The outflow of liquid to the outside is prevented. At the same time, the float valve body 25 reaches its upper limit position and abuts against the lower end portion of the small diameter air hole 24 provided in the floating valve body 23 to close it. By these series of actions, the discharge of air is completed, and the outflow of liquid to the outside is completely prevented.

  From this state, when air in the liquid flowing in the pipe enters the valve box from the inlet 15 and accumulates below the floating valve body 23, the float valve body 25 has its own weight due to the buoyancy of the float valve body 25 and the valve. When the upward load acting on the closed portion of the small diameter air hole 24 due to the sum of the pressure of the liquid inside the box is overcome, the float valve body 25 is lowered and the lower end portion of the small diameter air hole 24 is opened. Thereby, the air accumulated below the idle valve element 23 is discharged to the outside from the small diameter air hole 24. As the discharge proceeds, the liquid level rises again, and the float valve body 25 also rises due to the action of buoyancy. When the air is almost completely discharged, the float valve body 25 closes the lower end portion of the small-diameter air hole 24 to prevent the liquid from flowing out. Thereafter, as the predetermined amount of air accumulates in the valve box, the above-described exhaust action is repeated.

  Next, in the state of FIG. 8, when the liquid in the pipe is drained, the liquid level inside the valve box is lowered, and along with this, the idle valve element 23 and The float valve body 25 also descends sequentially, and the large-diameter air hole 22 is opened. As a result, air is smoothly introduced from the valve box into the pipe line, so that there is no negative pressure in the pipe line and the draining operation is performed without resistance, and at the same time, the so-called water hammer phenomenon occurs. Nor. At this time, foreign matters such as dust and sand that have entered the guide tube 16 are also discharged into the pipe from the liquid introduction port 19 as the liquid is drained. However, the float valve element 25 comes into contact with the lower end of the protrusion 20. In addition, since the liquid introduction port 19 is in communication with the inside of the guide tube 16, foreign matter such as dust and sand is prevented from accumulating.

  A joint according to a third embodiment of the present invention will be described with reference to FIG. In FIG. 9, 28 is a non-wetted part formed of DCPD. In this embodiment, the material of the non-wetted part is DCPD, but it is not particularly limited as long as it is a two-component reaction type resin.

  Reference numeral 29 denotes a wetted part formed of PTFE, and the non-wetted part and the wetted part are integrally formed. In the present embodiment, the material of the liquid contact portion is PTFE, but is not particularly limited as long as it is formed of resin and / or rubber, or an alloy blend composite material thereof.

  A tube according to a fourth embodiment of the present invention will be described with reference to FIG. In FIG. 10, 30 is a non-wetted part formed of DCPD. In this embodiment, the material of the non-wetted part is DCPD, but it is not particularly limited as long as it is a two-component reaction type resin.

  Reference numeral 31 denotes a wetted part formed of PTFE, and the non-wetted part and the wetted part are integrally formed. In the present embodiment, the material of the liquid contact portion is PTFE, but is not particularly limited as long as it is formed of resin and / or rubber, or an alloy blend composite material thereof.

  Next, the two-component reactive resin piping member of the present invention obtained above was evaluated. Moreover, the comparative evaluation test of the various physical properties by a test piece was done. The evaluation test method is shown below.

(1) Chemical resistance test The sample was adjusted for 24 hours at a temperature of 23 ± 1 ° C and a humidity of 50 ± 5%, and then the weight was measured. Further, the sample after the evaluation chemical solution was sealed for a predetermined period was washed with water, adjusted at a temperature of 23 ± 1 ° C. and a humidity of 50 ± 5% for 24 hours, then measured for weight, and the increase / decrease in the initial weight. The weight increase / decrease rate was obtained to make it chemical resistant. The evaluation chemical solution and evaluation temperature were 40% sulfuric acid 95 ° C., 10% nitric acid 80 ° C., 35% hydrochloric acid 50 ° C., 35% sodium hydroxide solution 105 ° C., and 12% sodium hypochlorite. The evaluation period is 112 days.
(2) Solvent resistance test The sample was adjusted at a temperature of 23 ± 1 ° C. and a humidity of 50 ± 5% for 24 hours, and then the weight was measured. Further, the sample after the solvent for evaluation was sealed for a predetermined period was washed with water, adjusted at a temperature of 23 ± 1 ° C. and a humidity of 50 ± 5% for 24 hours, then weighed, and the increase / decrease was the initial weight. The weight increase / decrease rate was obtained to make it solvent resistant. The evaluation period is 30 days.
(3) Dissolution test An ultrapure water sealed in a sample for evaluation is taken out after being kept in an oven at a temperature of 80 ± 2 ° C. for 24 hours, in a state of a temperature of 23 ± 1 ° C. and a humidity of 50 ± 5%. After adjusting for 24 hours, the total organic carbon (hereinafter referred to as TOC) contained in the enclosed ultrapure water was measured (TOC-V _CSH manufactured by Shimadzu Corporation) to obtain dissolution properties.
(4) Weather resistance test About the sample, the exposure test by the xenon arc light source based on JISK7350 was done. Irradiation amount and the irradiation time is 324,600kJ / m ² 100 hours at 20,940kJ / m ^2, 300 hours 64,170kJ / m ^2, 1000 hr at 207,320kJ / m ^2, 1500 hr. Appearance after irradiation was glossy with no discoloration, ◎, no gloss with no discoloration, and no gloss with discoloration.
In addition, the test piece was cut from the part formed of the two-component reactive resin of the sample used for the weather resistance test, and a tensile test based on JIS K 7127 was performed, and the strength of the two-component reactive resin before and after the evaluation. Retention was calculated.
(5) Impact resistance test Test method The first notched Izod impact test piece of JIS K 7124 was prepared, and the notched Izod impact test conforming to JIS K 7124 in the atmosphere of 0 ± 1 ° C and 23 ± 1 ° C. The impact strength was measured.
(6) Heat resistance test Test method A load deflection test according to JIS K 6911 was performed, and the load deflection temperature was measured.

[Example 1]
(A) Select PTFE “New Polyfluorone (trademark) PTFE M-112” manufactured by Daikin Industries, Ltd. as the material of the member of the wetted part.
(B) The PTFE is filled into a compression mold for PTFE molding, and a PTFE sheet ring having an inner diameter of 100 mm and a thickness of 3 mm is molded.
(C) In order to coat the non-wetted surface of the seat ring obtained in (b) with chloroprene “Skyprene (registered trademark) R-10 made by Tosoh Corporation”, the sheet ring is injection molding gold for chloroprene molding. The sheet was fixed at a predetermined position of the mold, and chloroprene was poured into the mold and cured to obtain a sheet ring coated with chloroprene.
(D) The seat ring is fixed to a predetermined position of the mold for two-component reaction type resin molding so that the seat ring obtained in (c) becomes a flow path of the valve body, and DCPD “PENTAM made by RIMTE C Co., Ltd.” (Registered Trademark) 1600 "was poured into a mold and cured to obtain a valve body in which a seat ring and DCPD were integrally formed.
(E) In order to enclose a chemical solution and a solvent in the flow path of the valve main body obtained in (d), it was sealed with a PTFE sheet and subjected to a chemical resistance test and a solvent resistance test. The results are shown in Table 1.

[Example 2]
(A) PVDF “KF Polymer (registered trademark) 1000” manufactured by Kureha Co., Ltd. is selected as the material of the member of the wetted part.
(B) Melt and knead by the PVDF injection molding machine, and pour into an injection mold for PVDF molding to form a PVDF sheet ring having an inner diameter of 100 mm and a thickness of 3 mm.
The following is performed in the same manner as in Example 1, and the results are shown in Table 1.

[Example 3]
(A) PVC is selected as the material of the member of the wetted part.
(B) 100 parts by weight of the PVC having an average molecular weight of 800, 1.5 parts by weight of a tin stabilizer, 1.0 part by weight of an ester wax, 0.5 part by weight of a polymer wax, and 1.0 part by weight of a processing aid. The resin composition in which 0.6 parts by weight of the colorant is mixed with a super mixer is melt-kneaded with an injection molding machine, poured into an injection mold for PVC molding, and has an inner diameter of 100 mm and a thickness of 3 mm. A PVC seat ring is molded.
The following is performed in the same manner as in Example 1, and the results are shown in Table 1.

[Example 4]
(A) PP “MA3” manufactured by Nippon Polypro Co., Ltd. is selected as the material for the material of the wetted part.
(B) The PP is melted and kneaded by an injection molding machine, poured into an injection molding die for PP molding, and a PP sheet ring having an inner diameter of 100 mm and a thickness of 3 mm is molded.
The following is performed in the same manner as in Example 1, and the results are shown in Table 1.

[Comparative Example 1]
(A) DCPD “PENTAM (registered trademark) 1600 manufactured by RIMTEC Co., Ltd.” was poured into a mold and cured to obtain a valve body having an inner diameter of 100 mm formed only of DCPD.
(B) In order to enclose a chemical solution and a solvent in the flow path of the valve main body obtained in (a), it was sealed with a PTFE sheet and subjected to a chemical resistance test and a solvent resistance test. The results are shown in Table 1.

[Example 5]
(A) Select PTFE “New Polyfluorone (trademark) PTFE M-112” manufactured by Daikin Industries, Ltd. as the material of the member of the wetted part.
(B) The PTFE is filled into a compression mold for PTFE molding, and a PTFE sheet ring having an inner diameter of 100 mm and a thickness of 3 mm is molded.
(C) In order to coat the non-wetted surface of the seat ring obtained in (b) with chloroprene “Skyprene (registered trademark) R-10 made by Tosoh Corporation”, the sheet ring is injection molding gold for chloroprene molding. The sheet was fixed at a predetermined position of the mold, and chloroprene was poured into the mold and cured to obtain a sheet ring coated with chloroprene.
(D) The seat ring is fixed to a predetermined position of the mold for two-component reaction type resin molding so that the seat ring obtained in (c) becomes a flow path of the valve body, and DCPD “PENTAM made by RIMTE C Co., Ltd.” (Registered Trademark) 1600 "was poured into a mold and cured to obtain a valve body in which a seat ring and DCPD were integrally formed.
(E) In order to enclose ultrapure water in the flow path of the valve body obtained in (d), it was sealed with a PTFE sheet, and an elution test was performed. The results are shown in Table 2.

[Example 6]
(A) PVDF “KF Polymer (registered trademark) 1000” manufactured by Kureha Co., Ltd. is selected as the material of the member of the wetted part.
(B) Melt and knead by the PVDF injection molding machine, and pour into an injection mold for PVDF molding to form a PVDF sheet ring having an inner diameter of 100 mm and a thickness of 3 mm.
The following is performed in the same manner as in Example 5, and the results are shown in Table 2.

[Example 7]
(A) PVC is selected as the material of the member of the wetted part.
(B) 100 parts by weight of the PVC having an average molecular weight of 800, 1.5 parts by weight of a tin stabilizer, 1.0 part by weight of an ester wax, 0.5 part by weight of a polymer wax, and 1.0 part by weight of a processing aid. The resin composition in which 0.6 parts by weight of the colorant is mixed with a super mixer is melt-kneaded with an injection molding machine, poured into an injection mold for PVC molding, and has an inner diameter of 100 mm and a thickness of 3 mm. A PVC seat ring is molded.
The following is performed in the same manner as in Example 5, and the results are shown in Table 2.

[Example 8]
(A) PP “MA3” manufactured by Nippon Polypro Co., Ltd. is selected as the material for the material of the wetted part.
(B) The PP is melted and kneaded by an injection molding machine, poured into an injection molding die for PP molding, and a PP sheet ring having an inner diameter of 100 mm and a thickness of 3 mm is molded.
The following is performed in the same manner as in Example 5, and the results are shown in Table 2.

[Comparative Example 2]
(A) DCPD “PENTAM (registered trademark) 1600 manufactured by RIMTEC Co., Ltd.” was injected into a mold and cured to obtain a 100 mm inner diameter valve body formed only of DCPD.
(B) In order to enclose ultrapure water in the flow path of the valve body obtained in (a), it was sealed with a PTFE sheet, and an elution test was performed. The results are shown in Table 2.

[Example 9]
(A) Select PTFE “New Polyfluorone (trademark) PTFE M-112” manufactured by Daikin Industries, Ltd. as the material of the member of the wetted part.
(B) The PTFE is filled into a compression mold for PTFE molding, and a PTFE sheet ring having an inner diameter of 100 mm and a thickness of 3 mm is molded.
(C) In order to coat the non-wetted surface of the seat ring obtained in (b) with chloroprene “Skyprene (registered trademark) R-10 made by Tosoh Corporation”, the sheet ring is injection molding gold for chloroprene molding. The sheet was fixed at a predetermined position of the mold, and chloroprene was poured into the mold and cured to obtain a sheet ring coated with chloroprene.
(D) The seat ring is fixed to a predetermined position of the two-component reaction type resin molding die so that the seat ring obtained in (c) becomes a valve body channel, and DCPD “PENTAM (registered by RIMTEC Corporation) is registered. Trademark) 1600 "was poured into a mold and cured to obtain a valve body in which a seat ring and DCPD were integrally formed.
(E) A weather resistance test was performed on the valve body obtained in (d). The results are shown in Table 3.

[Example 10]
(A) As a member of the wetted part, PVDF “KF Polymer (registered trademark) 1000” manufactured by Kureha Co., Ltd. is selected.
(B) Melt and knead by the PVDF injection molding machine, and pour into an injection mold for PVDF molding to form a PVDF sheet ring having an inner diameter of 100 mm and a thickness of 3 mm.
The following was performed in the same manner as in Example 9, and the results are shown in Table 3.

[Example 11]
(A) PVC is selected as the material of the member of the wetted part.
(B) 100 parts by weight of the PVC having an average molecular weight of 800, 1.5 parts by weight of a tin stabilizer, 1.0 part by weight of an ester wax, 0.5 part by weight of a polymer wax, and 1.0 part by weight of a processing aid. The resin composition in which 0.6 parts by weight of the colorant is mixed with a super mixer is melt-kneaded with an injection molding machine, poured into an injection mold for PVC molding, and has an inner diameter of 100 mm and a thickness of 3 mm. A PVC seat ring is molded.
The following was performed in the same manner as in Example 9, and the results are shown in Table 3.

[Example 12]
(A) PP “MA3” manufactured by Nippon Polypro Co., Ltd. is selected as the material for the material of the wetted part.
(B) The PP is melted and kneaded by an injection molding machine, poured into an injection molding die for PP molding, and a PP sheet ring having an inner diameter of 100 mm and a thickness of 3 mm is molded.
The following was performed in the same manner as in Example 9, and the results are shown in Table 3.

[Comparative Example 3]
(A) DCPD “PENTAM (registered trademark) 1600 manufactured by RIMTEC Co., Ltd.” was poured into a mold and cured to obtain a valve body having an inner diameter of 100 mm formed only of DCPD.
(B) A weather resistance test was performed on the valve body obtained in (a). The results are shown in Table 3.

[Example 13]
(A) DCPD “PENTAM (registered trademark) 1600 manufactured by RIMTEC Co., Ltd.” was injected into a mold and cured to obtain a valve having an inner diameter of 100 mm formed only of DCPD.
(B) About the valve | bulb main body obtained by (a), the outer surface was painted with the paint "V top (trademark)" by Dainippon Paint Co., Ltd.
(C) A weather resistance test was performed on the valve body obtained in (b). The results are shown in Table 4.

[Comparative Example 4]
(A) DCPD “PENTAM (registered trademark) 1600 manufactured by RIMTEC Co., Ltd.” was poured into a mold and cured to obtain a valve body having an inner diameter of 100 mm formed only of DCPD.
(B) A weather resistance test was performed on the main body of the valve 100 mm obtained in (a). The results are shown in Table 4.

[Example 14]
DCPD “PENTAM (registered trademark) 1600” manufactured by RIMTEC Co., Ltd. was mixed in a reaction injection molding machine and poured into a reaction injection mold whose temperature was adjusted to 80 ° C., and a plate shape of 200 mm square and 6 mm thickness. A molded product was obtained. A test piece was manufactured from this molded product by cutting, and an impact resistance test was performed. The results are shown in Table 5.

[Comparative Example 5]
A mold for compression molding whose temperature was adjusted to 250 ° C. with PTFE “New Polyflon (trademark) PTFE M-112” manufactured by Daikin Industries, Ltd. was obtained to obtain a plate-shaped molded product having a 200 mm square and a thickness of 6 mm. A test piece was manufactured from this molded product by cutting, and an impact resistance test was performed. The results are shown in Table 5.

[Comparative Example 6]
PVDF “KF Polymer (registered trademark) 1000” manufactured by Kureha Co., Ltd. was heated and melted with an injection molding machine, and a 200 mm square and 6 mm thick plate-like molded product was obtained by injection molding. A test piece was manufactured from this molded product by cutting, and an impact resistance test was performed. The results are shown in Table 5.

[Comparative Example 7]
100 parts by weight of PVC with an average molecular weight of 800, 1.5 parts by weight of tin stabilizer, 1.0 part by weight of ester wax, 0.5 part by weight of polymer wax, and 1.0 part by weight of processing aid A resin composition in which 0.6 parts by mass and a colorant were mixed with a super mixer was heated and melted by an injection molding machine, and a plate-like molded product having a 200 mm square and a thickness of 6 mm was obtained by injection molding. A test piece was manufactured from this molded product by cutting, and an impact resistance test was performed. The results are shown in Table 5.

[Comparative Example 8]
PP (MA3) manufactured by Nippon Polypro Co., Ltd. was heated and melted with an injection molding machine, and a 200 mm square plate-shaped molded product having a thickness of 6 mm was obtained by injection molding. A test piece was manufactured from this molded product by cutting, and an impact resistance test was performed. The results are shown in Table 5.

[Example 15]
DCPD “PENTAM (registered trademark) 1600” manufactured by RIMTEC Co., Ltd. was mixed in a reaction injection molding machine and poured into a reaction injection mold whose temperature was adjusted to 80 ° C., and a plate shape of 200 mm square and 6 mm thickness. A molded product was obtained. A test piece was manufactured from this molded product by cutting, and a heat resistance test was performed. The results are shown in Table 6.

[Comparative Example 9]
A mold for compression molding whose temperature was adjusted to 250 ° C. with PTFE “New Polyflon (trademark) PTFE M-112” manufactured by Daikin Industries, Ltd. was obtained to obtain a plate-shaped molded product having a 200 mm square and a thickness of 6 mm. A test piece was manufactured from this molded product by cutting, and a heat resistance test was performed. The results are shown in Table 6.

[Comparative Example 10]
PVDF “KF Polymer (registered trademark) 1000” manufactured by Kureha Co., Ltd. was heated and melted with an injection molding machine, and a 200 mm square and 6 mm thick plate-like molded product was obtained by injection molding. A test piece was manufactured from this molded product by cutting, and a heat resistance test was performed. The results are shown in Table 6.

[Comparative Example 11]
100 parts by weight of PVC with an average molecular weight of 800, 1.5 parts by weight of tin stabilizer, 1.0 part by weight of ester wax, 0.5 part by weight of polymer wax, and 1.0 part by weight of processing aid A resin composition in which 0.6 parts by mass and a colorant were mixed with a super mixer was heated and melted by an injection molding machine, and a plate-like molded product having a 200 mm square and a thickness of 6 mm was obtained by injection molding. A test piece was manufactured from this molded product by cutting, and a heat resistance test was performed. The results are shown in Table 6.

[Comparative Example 12]
PP “MA3” manufactured by Nippon Polypro Co., Ltd. was melted by heating with an injection molding machine, and a plate-shaped molded product having a 200 mm square and a thickness of 6 mm was obtained by injection molding. A test piece was manufactured from this molded product by cutting, and a heat resistance test was performed. The results are shown in Table 6.

  From the results of the chemical resistance test and the solvent resistance test shown in Table 1 above, the two-component reactive resin piping member of the present invention can use a material that is resistant to fluid in the wetted part. It can be seen that the chemical resistance and the solvent resistance are very excellent.

  From the results of the dissolution test shown in Table 2 above, the two-component reactive resin piping member of the present invention can be made of a low-elution material for the wetted part, so it has an excellent low-elution property. I understand that

  From the results of the weather resistance test in Table 3 above, the appearance of the portion formed by the two-component reactive resin used in the non-wetted part of the two-component reactive resin piping member of the present invention deteriorates over time. Although it can be confirmed, the physical properties do not deteriorate. Therefore, it turns out that the two-component reaction type resin piping member of the present invention is excellent in weather resistance.

  Further, from the results of the weather resistance test shown in Table 4 above, the two-component reactive resin piping member of the present invention is made of a material having excellent weather resistance on the outer surface formed of the two-component reactive resin in the non-wetted part. Since it can be painted, it is possible to obtain a two-component reactive resin piping member that is excellent in appearance and weather resistance by coating.

  In the two-component reaction type resin piping member, as shown in the results of Table 1, Table 2, Table 3, and Table 4, it can be combined with various members. It is possible to obtain. For this reason, in addition to the above, for example, a two-component reactive resin piping member having excellent oil resistance can be obtained. It turns out that it can be used without limiting the construction field.

  From the results of Table 5 above, it can be seen that the two-component reactive resin is greatly superior in impact resistance compared to other materials. This effect can be similarly obtained in the two-component reaction type resin piping member of the present invention. Therefore, for example, a two-component reaction type resin piping member can obtain superior impact resistance performance than a PVC piping member or a vinylidene fluoride resin piping member having the same diameter. Thus, it can be seen that the two-component reactive resin piping member of the present invention is very excellent in impact resistance.

  From the results of Table 6 above, it can be seen that the two-component reactive resin is greatly superior in heat resistance compared to other materials. This effect can be similarly obtained in the two-component reaction type resin piping member of the present invention. Therefore, for example, a two-component reaction type resin piping member can obtain better heat resistance than a PVC piping member or a vinylidene fluoride resin piping member having the same diameter. Thus, it turns out that the two-component reaction type resin piping member of the present invention is very excellent in heat resistance.

It is a perspective view which shows the closed state of the valve | bulb of this invention. It is a longitudinal cross-sectional view of FIG. It is a longitudinal cross-sectional view which shows the state which the bearing recessed part in which the stem lower end part is inserted in FIG. 2 penetrated. It is a longitudinal cross-sectional view which shows the state which has an intermediate | middle layer between a liquid-contact part and a non-wetted part in FIG. FIG. 5 is a longitudinal sectional view showing a state in which the intermediate layer is formed in a part between the wetted part and the non-wetted part in FIG. 4. It is a longitudinal cross-sectional view which shows the state by which the stem was divided into 2 in FIG. It is a longitudinal cross-sectional view which shows the open state of the air valve of this invention. It is a longitudinal cross-sectional view which shows the closed state of the air valve of FIG. It is a longitudinal cross-sectional view of the coupling which is the 3rd embodiment of this invention. It is a longitudinal cross-sectional view which shows the pipe | tube which is the 4th embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Valve body 2 Seat ring 3 Middle layer 4 Stem 5 Valve body 6 Top flange 7 Bearing recessed part 8 Flow path 9 Worm wheel 10 Worm 11 Shaft 12 Handle 13 Valve box non-wetted part 14 Valve box wetted part 15 Inlet 16 Guide cylinder 17 Channel gap 18 Communication port 19 Liquid introduction port 20 Projection 21 Lid body 22 Large diameter air hole 23 Floating valve body 24 Small diameter air hole 25 Float valve body 26 Valve seat 27 Cover 28 Joint body non-wetted part 29 Joint body wetted part 30 Tube non-wetted part 31 Tube wetted part

Claims (8)

  Resin and / or rubber in which the non-wetted part is made of a two-component reactive resin and at least one of the chemical properties, solvent resistance, and low elution properties of the wetted part is superior to the non-wetted part And a resin-made piping member which is integrally formed with the non-wetted part.   The liquid contact part is at least one of vinyl resin, olefin resin, fluorine resin, aromatic resin, urea resin, saturated rubber, unsaturated rubber, fluorine rubber, siloxy acid rubber, or The resin piping member according to claim 1, comprising at least one of these alloy blend composite materials.   The resin piping member according to claim 1 or 2, wherein the non-wetted part is molded by any one of reaction injection molding, resin transfer molding, infusion molding, and injection molding.   4. The coating material applied to the surface of the non-wetted part is excellent in at least one physical property of chemical resistance, solvent resistance, oil resistance, and weather resistance. A resin piping member according to claim 1.   The resin piping member according to any one of claims 1 to 4, wherein the resin piping member is a valve, a joint, or a pipe.   The valve is configured by a substantially disc-shaped or substantially spherical valve body, an annular seat ring disposed on the inner peripheral surface of the valve body, and a stem disposed substantially perpendicular to the axis of the flow path, The valve body rotates with the rotation of the stem, and the valve body presses and separates from the seat ring to shut off and open the flow path, and the member of the liquid contact part is the seat ring The resin piping member according to claim 5.   The resin piping member according to claim 6, wherein the stem is rotated by driving any one of manual type, electric type, and pneumatic type.   The valve has a valve box having an inlet in the lower part and an opening in the upper part, and a communication port in the upper part and a water inlet in the upper part between the outer peripheral surface and the inner peripheral surface of the valve box. A guide tube with a bottom provided with a flow passage gap, a lid body that is mounted at the opening of the valve box and sandwiched and fixed between the guide cylinder and having a large-diameter air hole in the center, and the inside of the guide cylinder A floating valve body that has a small-diameter air hole that is freely movable up and down and closes the large-diameter air hole of the lid body at an upper limit position, and a small diameter of the floating valve body that is provided in the guide cylinder so as to be movable up and down. An air valve including a float valve body that closes an air hole, wherein at least one of the valve box, the guide tube, the lid body, the floating valve body, and the float valve body includes the liquid contact portion. The resin piping member according to claim 5, comprising the non-wetted part.

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