JP2018141318A - Antifouling drain structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain structure in which water is hard to infiltrate between a water receiving body such as a bowl of a washstand and the like and a drain connection member such as a drain flange, and as a result generation of a malodor, darkening and the like resulting from water scale, garbage and the like deposited in a clearance is effectively prevented, in a structure connecting the water receiving body with a drain pipe via the drain connection member.SOLUTION: A drain connection member such as a drain flange which contacts a drain port of a water receiving body composed of thermosetting resin or pottery is formed of thermoplastic resin containing polymer oil. The polymer oil is eluted into a fine clearance between the drain port and the drain connection member, to prevent water from entering, and generation of a malodor, darkening and the like resulting from water scale, garbage and the like deposited in the clearance is effectively prevented.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a drainage structure that connects a water receiving body such as a watering device (a vanity, a hand-washer, a kitchen, a bathroom, etc.) and a drain pipe, and more specifically, while connecting the water receiving body and the drain pipe, The present invention relates to a drainage structure that is less prone to contamination by mold.

  In general, the drainage pipe is connected to a drainage pipe such as a wash basin through a drainage connection member such as a drainage flange. Is done. For example, the drainage flange is inserted from above the drainage port, the flange part of the drainage flange and the bottom surface of the drainage port are brought into contact, and the drainage flange is tightened with a nut through the packing from below the drainage port. Fix it. That is, it is known that water is fixed between the drain port and the drainage flange and the drainage flange is fixed by sandwiching the bottom surface of the drainage port with a nut through a flange portion and packing from above and below.

  In such a structure, a gap is created between the front end surface (outer peripheral end) of the flange portion of the drainage flange and the inner peripheral surface of the drainage port, and bad odors and darkening are caused by dirt and dust accumulated in the clearance. It can happen.

  A technique for preventing this has been proposed. For example, Japanese Patent Application Laid-Open No. 2012-112229 (Patent Document 1) discloses a flange portion formed by deformation of an annular tongue piece that extends from the upper surface of the flange portion and is thinner than the flange portion. There is disclosed a drain outlet connection structure in which a gap is prevented from being generated as much as possible between the front end surface and the inner peripheral surface of the drain outlet.

  However, there remains a need in the industry for drainage structures that are less prone to fouling.

JP 2012-112229 A

  The present inventors have observed in detail the contact point between the drainage connection member such as the drainage flange and the drainage port, even if both are connected so that there is no apparent gap or step, Found a very small gap. This gap is a place where water intrusion is not desired, but in reality, water may infiltrate and cause dirt. And the knowledge that drainage connection members, such as a drainage flange, were formed with specific resin can prevent invasion of water and can prevent dirt in a drainage structure effectively. The present invention is based on such knowledge.

  Accordingly, the present invention provides a structure in which a water receiving body such as a bowl such as a wash basin is connected to a drain pipe through a drain connection member such as a drain flange, and water enters between the water receiving body and the drain connection member. As a result, it is an object of the present invention to provide a drainage structure in which the generation of bad odors and darkening caused by scales and dust accumulated in the gaps is effectively prevented.

  Another object of the present invention is to provide a drainage connection member used in the drainage structure.

And the drainage structure by this invention is
A water receiving body composed of thermosetting resin or earthenware,
A drain outlet formed in the water receiving body;
A drainage structure comprising at least a drainage connection member for connecting the drainage port to a drainage pipe,
The drainage connection member has a contact portion that contacts the surface of the drainage port, and at least the contact portion is formed of a thermoplastic resin,
The thermoplastic resin comprises a polymer oil.

Furthermore, the drainage connection member according to the present invention is:
A drainage connection member that has a drainage port and is connected to a water receiving body constituted by a thermosetting resin or earthenware, and connects the drainage port and the drainage pipe,
It has a contact part that contacts the surface of the drain outlet with a line or a surface, and at least the contact part is formed of a thermoplastic resin,
The thermoplastic resin comprises a polymer oil.

It is explanatory drawing of the effect | action by which the invasion prevention of the drainage structure by this invention and also antifouling property are exhibited, and the contact location of the drainage connection member 1 and the surface 3 of the drainage port 2 formed in the water receiving body It is an enlarged view. It is an enlarged view of the contact location 4 of the drainage connection member 1 in FIG. 1 and the surface 3 of the drainage port 2 formed in the receiving water body. It is a schematic diagram of the washstand 100 provided with the drainage structure by this invention. It is a perspective view of the preferable example of the drainage structure by this invention. It is sectional drawing of the preferable example of the drainage structure by this invention. It is sectional drawing of the drainage flange in embodiment of this invention. It is an enlarged view which shows the vicinity of the drainage flange in FIG.

The drainage structure according to the present invention exhibits the antifouling property. The drainage structure according to the present invention has a drainage body, a water receiving body composed of a thermosetting resin or earthenware, and a drainage connection member that connects the drainage port to a drainage pipe. The drainage connection member has a contact portion that contacts the surface of the drainage port with a line or surface. Of course, this connection portion and the drain outlet are places where water intrusion is not desired. In the present invention, at least the contact portion is formed of a thermoplastic resin containing polymer oil.

  FIG. 1 and FIG. 2 are explanatory views of the action of preventing the intrusion of water and the antifouling property of the drainage structure according to the present invention. FIG. 1 is an enlarged view of a contact portion between a drainage port surface formed in a water receiving body and a drainage connection member in a drainage structure according to the present invention, the details of which will be described later, and FIG. It is an enlarged view.

  FIG. 1 shows a state in which the drainage connection member 1 is in contact with the surface 3 of the drainage port of a water receiving body 2 such as a bowl. In the present invention, the contact location between the two members is a location where entry of water is not desired. Therefore, in the present invention, “contact with a surface” means that even if it is understood that the contact is made with a line macroscopically, contact with the surface with a certain area microscopically prevents water from entering. The aspect contacted by intention is also included. The drainage connection member 1 and the surface 2 of the drainage port are in contact with each other for the purpose of preventing water from entering, but there is a possibility that a very slight gap may be generated. This will be described with reference to FIG.

  FIG. 2 is an enlarged view of a contact portion 4 between the drainage connection member 1 and the surface 2 of the drainage port in FIG. In the present invention, a water receiving body such as a bowl is manufactured by heating and pressurizing a thermosetting resin or earthenware. These materials are subject to shrinkage due to heat during production, which may limit dimensional accuracy. On the other hand, in the present invention, at least a portion of the drainage connection member that contacts the drainage port surface is formed of a thermoplastic resin. The dimensional accuracy of the thermoplastic resin can be expected to be higher than that of the thermosetting resin and earthenware, but a minute gap 5 as shown in FIG. The gap 5 is a place where water intrusion is not desired, but in reality, water may enter and cause dirt. In this invention, the part (namely, contact part) which contacts at least the surface 2 of the drain outlet of the drainage connection member 1 is formed with the thermoplastic resin containing polymer oil. In the present invention, as shown in FIG. 2, the polymer oil 6 is eluted into the gap 5 to prevent water from entering and exhibiting antifouling properties. This effect can extend over a long period of time.

  In the present invention, since the polymer oil can be leached into the gap to prevent water from entering, according to one aspect of the present invention, the dimensional accuracy of the surface of the drainage connection member and the drainage port is high. The advantage that a drainage structure can be manufactured without obtaining is obtained.

Preferred Embodiment of Drainage Structure FIG. 3 is a schematic view of a wash basin 100 having a drainage structure according to the present invention. In the figure, a water receiving body 110 that is a bowl part, a faucet device 120 that discharges water to the bowl part 110, and And a drain port 130 formed on the bottom surface 111 of the bowl portion 110. The drainage structure 101 according to the present invention is connected to and integrated with the drainage port 130 of the bowl portion 110 to connect the drainage port 130 and the drainage pipe 150.

  FIG. 4 is a perspective view of a preferred embodiment of the drainage structure according to the present invention, and FIG. 5 is a cross-sectional view of a preferred embodiment of the drainage structure according to the present invention. As shown in FIG. 4, the drain port 130 is formed in a cylindrical shape in which a part of the bottom surface 111 of the bowl portion 110 is recessed downward. The inner peripheral surface 131 of the drain port 130 is formed so as to be smoothly inclined from the upper side to the lower side and gradually squeezed. That is, the radius of the lower end of the inner peripheral surface 131 is narrower than the upper end of the inner peripheral surface 131. A drain plug 140 is provided above the drain port 130. The drain plug 140 is permanently installed in the drain port 130 and can open and close the drain port 130 by moving up and down in the vertical direction. The member 141 is a hair catcher for preventing hair and large solids from entering the drain pipe. A cylindrical drainage flange 160 as a drainage connection member for connecting the bowl part 110 and the drainage pipe 150 is fixed to the drainage port 130 by a nut-like fastening member 170.

  A drainage flange 160 as a drainage connection member is formed by expanding in the radial direction from an upper portion thereof, and a front end surface 161a that is in contact with the inner peripheral surface of the drainage port 130 on the outer peripheral surface of the flange portion 161. And have. Furthermore, although it is not essential in the present invention, it preferably has a groove 162 that is recessed radially inward from the tip end portion 161 a, and this groove 162 has a gap between the drain outlet 130 and the drainage flange 160. An O-ring 180 is attached as an annular packing that stops water. In the present embodiment, an O-ring having a circular cross section is used as the annular packing. However, the present invention is not limited to this, and other cross-sectional shapes such as an X ring may be used.

  The drainage flange 160 is inserted from above the drainage port 130 and is fixed to the drainage port 130. In a state of being fixed to the drain port 130, the front end surface 161 a of the flange portion 161 of the drain flange 160 is in contact with the inner peripheral surface 131 of the drain port 130. Further, the outer peripheral surface 160 a of the drainage flange 160 below the flange portion 161 is threaded so as to be screwed with the fastening member 170.

  In a state where the drainage flange 160 is attached to the drainage port 130, a space S is formed by the lower surface of the flange portion 161, the inner peripheral surface 131 of the drainage port 130, and the outer peripheral surface 160 a of the drainage flange.

The fastening member 170 is a cylindrical nut, and is provided to fix the vertical position of the drainage flange 160. The fastening member 170 has a threaded inner peripheral surface and is screwed into a thread groove formed on the peripheral surface of the drainage flange 160. Further, the fastening member 170 is screwed with the drainage flange 160 to a position where it is in contact with the lower surface of the drainage port 130.
The fastening member 170 is provided with an extending portion 171 formed to hang downward.
The outer periphery of the extending portion 171 is threaded, and the drainage pipe 150 can be fixed to the drainage port 130 of the bowl part 110 by screwing a screw groove formed in the drainage pipe 150.

  Further, the drain pipe 150 is connected to the drain port 130 of the bowl portion 110 by being screwed with the fastening member 170 in which the fixing position of the drain pipe 150 is always the same, so that the drain pipe 150 is connected to the inner peripheral surface 131 of the drain flange 160. Even when the fixing position of the drainage pipe 150 is changed, the drain pipe 150 can always be fixed at the same position.

  Next, the drainage flange 160 will be described in detail with reference to FIGS. As shown in FIG. 6, the flange portion 161 of the drainage flange 160 is formed such that the thickness of the flange portion 161 increases as it becomes radially outward. In other words, the flange 161 has a tip 161c that is thicker than the root 161d, and therefore is likely to be gradually elastically deformed from the root of the flange. Therefore, the flange 161 can be reduced in diameter in the radial direction of the drainage flange 160 when a load is applied to the front end surface 161a of the flange 161 from the outside in the radial direction to the inside. As a result, it is possible to insert the drainage flange 160 to a position where the front end surface 161a of the flange portion 161 can be brought into contact with the inner peripheral surface 131 without a gap while suppressing local deformation of the flange portion 161. it can.

  Further, when the drainage flange 160 is inserted, the flange portion 161 can be gradually deformed from the root 161d and brought into contact with the drainage port, so that the shape of the tip 161c is not greatly deformed on the inner peripheral surface 131. The front end surface 161 a can be brought into contact, and it is difficult to form a gap between the drain port 130 and the flange portion 161.

  It is preferable that the front end surface 161 a of the flange portion 161 has a shape that is inclined inward in the radial direction of the drainage flange 160 so as to be in contact with the inner peripheral surface 131. That is, the front end surface 161a of the flange portion 161 is inclined in accordance with the inclination of the inner peripheral surface 131 of the drain port 130. Therefore, the inner peripheral surface 131 and the front end surface 161a are not affected by the dimensions of the drain port 130. It is possible to make contact between them without gaps. However, even if the inner peripheral surface 131 and the front end surface 161a are connected without a gap, a slight gap that allows water to enter is generated. In the present invention, since the polymer oil elutes in this slight gap, it is possible to prevent water from entering. Therefore, the occurrence of darkening can be suppressed. The upper surface 161b of the flange portion 161 is inclined downward toward the center in the radial direction, and is smoothly connected to the inner peripheral surface 160b of the drainage flange 160. Therefore, the drainage does not collect on the upper surface 161 b of the flange portion 161, and the drainage can be guided to the inner peripheral surface 160 b of the drainage flange 160.

  In this aspect, preferably, the O-ring 180 in a state where the drainage flange 160 is not attached to the drainage port 130 has more than half of the O-ring 180 in the groove 162 in a side view, and a part of the O-ring 180 is the front end surface. It protrudes radially outward from 161a. In other words, the O-ring 180 is attached so that a part of the O-ring 180 protrudes from the groove 162 and a gap is formed above and below the groove 162.

  When the drainage flange 160 is attached to the drainage port 130, the portion of the O-ring 180 that protrudes from the front end surface 161 a of the O-ring 180 comes into contact with the inner peripheral surface 131 of the drainage port 130 and is elastically deformed and crushed. Thus, the water stop between the drain port 130 and the drain flange 160 is made more complete. In this aspect, when the drainage flange 160 is attached to the drainage port 130, the O-ring 180 is subjected to friction in a direction opposite to the insertion direction into the drainage flange 160, that is, from below to above. The O-ring 180 is crushed by elastic deformation in the groove 162 so that the upper gap in the groove 162 is filled. Therefore, when the drainage flange 160 is attached to the drainage port 130, it is difficult for the drainage to enter below the upper end of the front end surface of the flange portion due to the capillary phenomenon, and molds propagate more reliably, and darkening and odor are generated. Can be suppressed. Further, the drainage flange 160 tries to move upward due to the reaction force of the elastic deformation of the O-ring 180, but since the drainage flange 160 is fixed by the fastening member 170, the drainage flange 160 is prevented from moving upward and stopped. The advantage that the water state can be maintained is also obtained.

Thermoplastic Resin Forming Drainage Connection Member In the present invention, the drainage connection member, that is, the drainage flange 160 of the embodiment in the figure is formed of a thermoplastic resin.

  In the present invention, as the thermoplastic resin, polypropylene resin (PP), polyethylene resin (PE), polyacetal resin (POM), polybutylene terephthalate resin (PBT), polyvinyl chloride resin (PVC), polystyrene resin (PS), Acrylonitrile-butadiene-styrene copolymer resin (ABS), polyphenylene sulfide resin (PPS), polyethylene terephthalate resin (PET), polymethyl methacrylate resin (PMMA), polyamide resin (PA), polyether ether ketone resin (PEEK), One or more selected from polytrimethylene terephthalate resin (PTT), polycarbonate resin (PC), and polytetrafluoroethylene tetrafluoroethylene resin (PTFE) can be used.

  According to a further preferable aspect of the present invention, it is more preferable to use one or more kinds selected from PP, PE, POM, PBT, PVC, ABS, PPS, PET, PMMA, PA, and PC as the thermoplastic resin. Even more preferable among these is at least one selected from PP, POM, and ABS.

Polymer oil contained in thermoplastic resin In the present invention, the thermoplastic resin forming the drainage connection member comprises polymer oil. This polymer oil needs to be able to be gradually eluted from the thermoplastic resin, and the elution amount can be controlled in consideration of the molecular weight of the polymer oil and the compatibility with the thermoplastic resin. Further, according to a preferred embodiment of the present invention, the polymer oil having low compatibility with water is preferable from the viewpoint of the water stopping effect. In the present invention, the polymer oil is preferably selected from a fluorine-based polymer oil or a silicone-based polymer oil.

  In the present invention, the thermoplastic resin preferably contains 0.1% by mass to 10% by mass of polymer oil, more preferably 0.1% by mass to 5% by mass, and more preferably 2% by mass to 4% by mass. It is even more preferable to include the following.

Fluoropolymer oil In the present invention, the fluoropolymer oil includes tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene / hexafluoropropylene copolymer (FEP), tetrafluoroethylene / One or more selected from ethylene copolymer (ETFE), polytetrafluoroethylene (PTFE), and polychlorotrifluoroethylene (PCTFE) can be used.

Silicone-based polymer oil According to a preferred embodiment of the present invention, the silicone-based polymer oil has the general formula (I):
R ₃ SiO— (R ₂ SiO) n—SiR ₃
Here, R is preferably a compound represented by the same or different alkyl group, preferably a C _1-6 alkyl group.

  Specific examples of the silicone-based polymer oil include dimethyl silicone oil, methylphenyl silicone oil, alkyl-modified silicone oil, fluorosilicone oil, polyether-modified silicone oil, and fatty acid ester-modified silicone oil, and one or more of these are used. It is possible. The viscosity generally ranges from 0.5 cSt to 1,000,000 cSt. In the present invention, the viscosity is preferably from 10 to 1,000 cSt in consideration of bleeding. Thereby, it is possible to ensure a good amount of elution of the silicone-based polymer oil to the resin surface.

Addition of Other Components to Resin The thermoplastic resin forming the drainage connection member in the present invention can optionally contain other components, such as reactive silicone, antibacterial agent, antifungal agent, talc. And additives such as glass fiber, carbon fiber, cellulose fiber, antioxidant, light stabilizer, ultraviolet absorber, and colorant. When design properties are taken into consideration, an inorganic pigment or an organic pigment can be included as a colorant. As the inorganic pigment, titanium oxide, talc, silica and the like can be used. Organic pigments include Pigment Yellow 83, Pigment Red 48: 2, Pigment Red 48: 3, Pigment Violet 23, Pigment Blue 15, Pigment Blue 15: 1, Pigment Blue 15: 2, Pigment Blue 15: 3, Pigment Green 7 Pigment Green 36 and the like. Hereinafter, these optional components will be described.

Reactive Silicone In the present invention, the thermoplastic resin can contain a reactive silicone. As the reactive silicone, a silicone resin in which one end of a molecular chain is blocked with one selected from a dimethylvinylsiloxane group, an acryloyl group, and a methacryloyl group can be used. Specific examples include one-end modified acrylic silicone and one-end modified methacryl silicone.

  In the present invention, the reactive silicone is preferably used as a silicone graft resin obtained by graft-polymerizing a reactive silicone onto a resin. This makes it possible to fix the reactive silicone to the resin, so that it is possible to maintain water repellency for a long time.

  In the present invention, the silicone graft resin can be obtained by bonding a silicone resin in which one end of a molecular chain is blocked with one kind selected from a dimethylvinylsiloxane group, an acryloyl group, and a methacryloyl group to the main chain of the resin. I can do it. Specific production methods and the like are known and can be obtained, for example, according to the description in JP-A-8-127660.

  For example, when silicone grafted polypropylene is used as the silicone graft resin, silicone grafted polypropylene is commercially available and can be used in the present invention. Examples of commercially available silicone-grafted polypropylene include X-22-1101 (Shin-Etsu Chemical Co., Ltd.) and BY27-201 (Toray Dow Corning Co., Ltd.).

  In the present invention, the reactive silicone is preferably contained in the thermoplastic resin in an amount of 0 to 10% by mass, more preferably 0 to 4% by mass, and more preferably 2 to 4% by mass. Is even more preferred.

Organic antibacterial and antifungal agent In the present invention, the thermoplastic resin may contain an organic antibacterial and antifungal agent. Here, the organic antibacterial and antifungal agent refers to bacteria and fungi described in the antibacterial and antifungal dictionary-original edition-(Japan Journal of Antibacterial and Antifungal Society, 1998, Vol. 26). It means an organic drug having MIC (Minimum Growth Inhibitory Concentration).

  In the present invention, as the organic antibacterial and antifungal agents, for example, alcohol antibacterial and antifungal agents, aldehyde antibacterial and antifungal agents, thiazoline and other antibacterial and fungicides, imidazole and other antibacterial and fungicides, ester Antibacterial fungi, peroxide antibacterial fungi, carboxylic acid antibacterial fungi, carbamate antibacterial fungi, sulfamide antibacterial fungi, quaternary ammonium salt antibacterial fungi, biguanide antibacterial It is possible to use one or more selected from antifungal agents, pyridine antibacterial fungicides, phenolic antibacterial fungicides, iodine antibacterial fungicides, and triazole antibacterial fungicides.

  In the present invention, the following organic antibacterial and antifungal agents can be used specifically.

Alcohol-based antibacterial and antifungal agents include ethanol, isopropanol, propanol, trisnitro (trishydroxymethylnitromethane), chlorobutanol (1,1,1-trichloro-2-methyl-2-propanol), bronopol (2-bromo-2) One or more selected from (nitropropane-1,3-diol) can be used.

As the aldehyde antibacterial and antifungal agent, one or more selected from glutaraldehyde, formaldehyde, and BCA (α-bromocinnamaldehyde) can be used.

Thiazoline antibacterial and antifungal agents include OIT (2-n-octyl-4-isothiazolin-3-one), MIT (2-methyl-4-isothiazolin-3-one), CMI (5-chloro-2-methyl) -4-isothiazolin-3-one), BIT (1,2-benzisothiazolone), n-butyl BIT (Nn-butyl-1,2-benzisothiazolone-3) may be used. it can.

The structural formula of OIT is shown in Chemical Formula 1.

The structural formula of MIT is shown in Chemical Formula 2.

The structural formula of CMI is shown in Chemical Formula 3.

The structural formula of BIT is shown in Chemical Formula 4.

  As the imidazole antibacterial and antifungal agent, one or more selected from TBZ (2- (4-thiazolyl) -benzimidazole) and BCM (methyl-2-benzimidazole carbamate) can be used.

  As the ester antibacterial and antifungal agent, lauricidine (glycerol laurate) and the like can be used.

  Chlorine antibacterial and antifungal agents include triclocarban (3,4,4′-trichlorocarbanilide), halocarban (4,4-dichloro-3- (3-fluoromethyl) -carbanilide), 2,4,4 One or more selected from 5,6-tetrachloroisophthalonitrile, sodium hypochlorite, dichloroisocyanuric acid, and trichloroisocyanuric acid can be used.

  As the peroxide antibacterial and antifungal agent, one or more selected from hydrogen peroxide, chlorine dioxide, and peracetic acid can be used.

  Carboxylic acid antibacterial fungicides include benzoic acid, sorbic acid, caprylic acid, propionic acid, 10-undecylenic acid, potassium sorbate, potassium propionate, calcium propionate, sodium benzoate, sodium propionate, magnesium dihydrogen One or more selected from bismonoperoxyphthalate and zinc undecylenate can be used.

  As the carbamate antibacterial and antifungal agent, sodium N-methyldithiocarbamate can be used.

  As the sulfamide antibacterial and antifungal agent, one or more selected from dichlorofluanide and trifluanid can be used.

  The quaternary ammonium salt antibacterial and antifungal agents include 4,4 ′-(tetramethylenedicarbonyldiamino) bis (1-decylpyridiniumboromide), benzalkonium chloride, benzotonium chloride, acetylammonium bromide, N, One or more selected from N′-hexamethylenebis (4-carbonyl-1-decylpyridinium bromide) and cetylpyridinium chloride can be used.

  As the biguanide antibacterial and antifungal agent, one or more selected from chlorhexidine gluconate, chlorhexidine hydrochloride, polypiguanide hydrochloride, and polyhexamethylenepiguanide can be used.

  Examples of pyridine-based antibacterial and antifungal agents include sodium pyrithione, zinc pyrithione (ZPT: bis (2-pyridithio-1-oxide) zinc), densyl (2,3,5,6, -tetrachloro-4- (methylsulfonyl) pyridine. 1) or more selected from copper pyrithione (bis (2-pyridithio-1-oxide) copper).

The structural formula of ZPT is shown in Chemical formula 5.

  Phenol antibacterial and antifungal agents include thymol (2-isopropyl-5-methylphenol), biosol (3-methyl-4-isopropylphenol), OPP (orthophenylphenol), phenol, butylparaben (butyl-p-hydroxy) Benzoate), ethylparaben (ethyl-p-hydroxybenzoate), methylparaben (methyl-p-hydroxybenzoate), propylparaben (propyl-p-hydroxybenzoate), metacresol, orthocresol, paracresol, sodium orthophenylphenol, chloro One or more selected from phen (2-benzyl-4-chlorophenol) and chlorocresol (2-methyl-3-chlorophenol) can be used.

  Examples of iodine-based antibacterial and antifungal agents include Amical 48 iodine (diiodomethyl-p-tolyl-sulfone), polyvinylpyrrolidone iodine, p-chlorophenyl-3-iodopropargyl formal, 3-bromo-2,3-diiodo-propenyl ethyl carbonate One or more selected from 3-iodo-2-propynyl butyl carbonate can be used.

  Examples of triazole antibacterial and antifungal agents include tebuconazole ((±) -α- [2- (4-chlorophenyl) ethyl] -α- (1,1-dimethylethyl) -1H-1,2,4-triazole-1 -Ethanol) and the like can be used.

  In the present invention, two or more organic antibacterial and antifungal agents can be used. Thereby, it is possible to further suppress the growth of bacteria and mold.

  In the present invention, as the organic antibacterial / antifungal agent, two or more organic antibacterial / antifungal agents having different elution rates can be used. This makes it possible to suppress the growth of fungi and molds over a longer period.

In the present invention, when two types of organic antibacterial / antifungal agents are used, the thermoplastic resin includes a first organic antibacterial / antifungal agent and a second organic antibacterial / antifungal agent. The first organic antibacterial and antifungal agent preferably has an elution rate of 10 ⁻⁹ g / cm ² / h or more, and more preferably 10 ⁻⁸ g / cm ² / h or more. The elution rate of the second organic antibacterial and antifungal agent is preferably 5 times or more, more preferably 10 or more times that of the first organic antibacterial and antifungal agent. Thereby, since the second organic antibacterial and antifungal agent elutes quickly on the surface of the thermoplastic resin, it is possible to suppress the growth of bacteria and molds at the beginning of using the thermoplastic resin. In addition, since the first organic antibacterial and antifungal agent elutes at a slower rate than the second organic antibacterial and antifungal agent, it is possible to suppress the growth of bacteria and fungi over a long period of time.

  In the present invention, it is preferable to use one or more selected from a thiazoline antibacterial and antifungal agent and a pyridine antibacterial and antifungal agent as the organic antibacterial and antifungal agent. This makes it possible to further suppress the growth of fungi and mold around the water. As the organic antibacterial and antifungal agent, it is more preferable to use a thiazoline antibacterial and antifungal agent and a pyridine antibacterial and antifungal agent.

  In the present invention, as the organic antibacterial and antifungal agent, those supported on an inorganic compound can be used. Thereby, the heat resistance of the organic antibacterial and antifungal agent can be improved, and it is possible to suppress the generation of gas during heat molding. Moreover, since the rate at which the organic antibacterial and antifungal agent elutes from the thermoplastic resin can be controlled, it is possible to suppress the growth of bacteria and fungi over the long term.

  As the inorganic compound, one or more selected from zeolite, glass, talc, silica gel, silicate, mica, and sepiolite can be used. Among these, it is preferable to use one or more selected from zeolite, talc, and glass.

  In the present invention, the organic antibacterial and antifungal agent is preferably contained in the thermoplastic resin in an amount of 1% by mass to 10% by mass. This makes it possible to impart antibacterial and antifungal properties to the thermoplastic resin. More preferably, it is 1 mass% or more and 5 mass% or less, More preferably, it contains 1 mass% or more and 3 mass% or less. Thereby, the moldability at the time of heat molding is good, and it becomes possible to suppress the growth of bacteria and molds in the long term.

Inorganic antibacterial agent In the present invention, the thermoplastic resin may contain an inorganic antibacterial agent. Here, the inorganic antibacterial and antifungal agent is an MIC against at least bacteria described in the antibacterial and antifungal dictionary-original edition-(Journal of the Japanese Society for Antibacterial and Antifungal, 1998, Vol. 26). It means an inorganic drug having (minimum growth inhibitory concentration).

  In the present invention, the inorganic antibacterial agent may be one or more selected from silver antibacterial agents, zinc antibacterial agents, and copper antibacterial agents. Thereby, since an antibacterial effect can be imparted to a wide variety of bacteria, it is possible to suppress the production of a biofilm produced by the growth of the bacteria. Therefore, the growth of molds that adhere to the biofilm as a scaffold can also be suppressed.

  In the present invention, it is possible to use an inorganic antibacterial agent in which one or more selected from silver ions, zinc ions and copper ions are supported on an inorganic compound. As the inorganic compound, it is possible to use one or more selected from zeolite, glass, talc, silica gel, silicate, mica, and sepiolite. When using a plurality of ionic species, each ion may be supported on the same inorganic compound. Specifically, an inorganic antibacterial agent in which silver ions and zinc ions are supported on glass can be used. Moreover, when using several ion species, each ion may be carry | supported by the different inorganic compound. Specifically, it is possible to use an inorganic antibacterial agent in which silver ions are supported on glass and an inorganic antibacterial agent in which zinc ions are supported on zeolite.

In the present invention, it is preferable to use a composite of silver and an inorganic oxide other than silver as the silver-based antibacterial agent. Specifically, silver-zirconium phosphate (Ag _x H _y Na _z Zr ₂ (PO) ₄ ) ₃ ) (x + y + z = 1), silver chloride-titanium oxide (AgCl / TiO ₂ ), silver-zinc calcium phosphate (Ag—Ca _x Zn _y Al _z (PO) ₄ ) ₆ (x + y + z = 10), silver zinc aluminum silicate (mixture) M ₂ / n · Na ₂ O · 2SiO ₂ · xH ₂ O (M: Ag , Zn, NH ₄ )) can be used.

In the present invention, zinc oxide / silver / zirconium phosphate (ZnO, Ag _x H _y Na _z Zr ₂ (PO) ₄ ) ₃ ) or the like can be used as the zinc-based antibacterial agent.

  In the present invention, N-stearolyl-L-glutamic acid AgCu salt or the like can be used as the copper antibacterial agent.

  In the present invention, a silver antibacterial agent is preferably used as the inorganic antibacterial agent. More preferably, a composite of silver and an inorganic oxide other than silver is used. Thereby, since excessive elution of silver can be suppressed on the surface of the thermoplastic resin, it becomes possible to suppress the growth of bacteria over a long period of time.

  In the present invention, the thermoplastic resin preferably contains 0.1 to 10% by mass of an inorganic antibacterial agent, more preferably 0.1 to 5% by mass, and more preferably 0.1 to 5% by mass. More preferably, the content is 1% by mass or less. Thereby, it is possible to suppress the growth of bacteria over a long period of time and suppress the production of biofilm.

  In this invention, it is preferable that a thermoplastic resin contains 0.01 mass% or more of inorganic type antibacterial agents, More preferably, it is 0.03 mass% or more. This makes it possible to impart an antibacterial effect to a wide variety of bacteria.

  In this invention, it is preferable that the elution rate of the inorganic antibacterial agent in a thermoplastic resin is 1/5 or less with respect to the elution rate of a 1st organic antibacterial antifungal agent, and is 1/10 or less. More preferably it is. That is, it is preferably 5 times or more slower than the elution rate of the first organic antibacterial and antifungal agent, more preferably 10 times or more slower. As a result, the elution rate is slower than that of the first and second organic antibacterial and antifungal agents, so even after the elution of the first and second organic antibacterial and antifungal agents has progressed on the surface of the thermoplastic resin. The elution of inorganic antibacterial agents continues. This makes it possible to suppress the growth of bacteria and molds over a long period of time.

  The amount of the inorganic antibacterial agent and the organic antibacterial and antifungal agent on the thermoplastic resin and its surface can be obtained by the method shown below.

  Using analytical techniques, it is possible to obtain the amount of the resin and the inorganic antibacterial and organic antibacterial agents contained on the surface thereof. Analysis methods include X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), electron beam microanalyzer (EPMA), glow discharge emission spectrometer (GD-OES), glow discharge mass spectrometer (GD-MS). ), Total reflection infrared absorption method (ATR-IR), and the like. It can select suitably according to the kind of inorganic type antimicrobial agent and organic type antimicrobial antifungal agent.

  It is possible to obtain the amount of inorganic antibacterial agent and organic antibacterial fungicide on the surface of the resin by using the amount of inorganic antibacterial agent and organic antibacterial fungicide contained in the resin obtained by the analytical method. . The rate at which the inorganic antibacterial agent and the organic antibacterial fungicide are eluted from the thermoplastic resin is measured. From the amount of the inorganic antibacterial agent and organic antibacterial fungicide contained in the resin and the respective elution rates, the amount of the inorganic antibacterial agent and organic antibacterial fungicide on the surface of the resin can be determined.

  The drainage structure of the present invention can be used for a bathtub, a bathroom floor, a kitchen sink, a hand-washer, etc. in addition to a vanity.

  When the water receiving body is a bathtub, the drainage connection member may exist as a member such as a trap, a drainage flange, or a water seal.

  When the water receiving body is a bathroom floor, the drainage connection member may be present as a member such as a drainage pit, a trap, a drainage flange, or a sealing cylinder.

  When the water receiving body is a sink of a kitchen, the drainage connection member may be present as a member such as a trap, a drainage flange, or a sealing tube.

  When the water receiving body is a hand-washer, the drainage connection member may be present in the form of a drainage flange or the like.

  The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Preparation of drainage connection member 100g of polypropylene resin was melted by heating at 180 ° C, and 1.5g of thiazoline antibacterial and antifungal agent containing 2-n-octyl-4-thiazolin-3-one (OIT) and zinc pyrithione (ZPT) Pyridine antibacterial fungicide containing 0.5 g, silver antibacterial agent 0.3 g, PP graft silicone 1.6 g, and dimethyl silicone 0.4 g as a silicone polymer oil were mixed to prepare pellets. This pellet was injection molded at 200 ° C. to obtain a drainage flange 160 shown in FIG.

Evaluation of antifouling property The produced drainage flange was attached to the drainage port of the bowl of the vanity shown in FIG. A bowl made of a thermosetting resin was used. The drainage port is not stepped and is attached so that there is no gap between the inner peripheral surface of the drainage port and the drainage flange. It was confirmed that a fine gap of about 10 μm was formed.

  A fixed amount of simulated sewage was periodically poured into the bowl. Three weeks after the start of the test, the drainage flange was removed from the bowl, and the space between the bowl and the drainage flange was visually evaluated. As a result, there was no adhesion of dirt and no ingress of water was confirmed.

DESCRIPTION OF SYMBOLS 1 ... Vanity stand, 100 ... Wash-stand, 110 ... Bowl part, 111 ... Bottom, 120 ... Water faucet device, 130 ... Drain port, 131 ... Inner peripheral surface, 140 ... Drain plug, 150 ... Drain pipe, 160 ... Drain Flange, 160a ... outer peripheral surface, 160b ... inner peripheral surface, 161 ... flange portion, 161a ... tip surface, 161b ... upper surface, 162 ... groove, 170 ... fastening member, 171 ... extension portion, 180 ... O-ring

Claims (7)

A water receiving body composed of thermosetting resin or earthenware,
A drain outlet formed in the water receiving body;
A drainage structure comprising at least a drainage connection member for connecting the drainage port to a drainage pipe,
The drainage connection member has a contact portion that contacts the surface of the drainage port, and at least the contact portion is formed of a thermoplastic resin,
The drainage structure, wherein the thermoplastic resin comprises a polymer oil, and the polymer oil is eluted on the surface of the contact portion.   The drainage structure according to claim 1, wherein the polymer oil is a fluorine-based polymer oil or a silicone-based polymer oil. The polymer oil has the general formula (I):
R ₃ SiO— (R ₂ SiO) n—SiR ₃
(Wherein R is the same or different alkyl group)
The drainage structure according to claim 1 or 2, which is a silicone-based polymer oil represented by: The drainage structure according to claim 3, wherein the polymer oil is a silicone-based polymer oil represented by the general formula (I) in which R is a C _1-6 alkyl group.   The drainage structure according to any one of claims 1 to 4, wherein the drainage connection member is a drainage flange.   The drainage structure according to any one of claims 1 to 5, wherein the thermoplastic resin further comprises an organic antibacterial and antifungal agent or an inorganic antibacterial agent. A drainage connection member that has a drainage port and is connected to a water receiving body constituted by a thermosetting resin or earthenware, and connects the drainage port and the drainage pipe,
It has a contact part that contacts the surface of the drain outlet with a line or a surface, and at least the contact part is formed of a thermoplastic resin,
A drainage connection member, wherein the thermoplastic resin comprises a polymer oil.

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