JP2019085542A - Molded body, household electric appliance, member for toilet, and toilet seat - Google Patents

Abstract

To suppress adhesion of dirt while keeping appearance of a base resin without increasing the number of steps.SOLUTION: A molded body contains a base resin and olefin wax, in which an olefin wax layer is formed on at least a part of a molded body surface during molding, and a thickness of the olefin wax is more than 0 and less than 500 nm. The olefin wax layer having a thin surface during molding is effectively exposed, thereby the surface is formed into a surface to which droplet dirt is less likely to be bonded.SELECTED DRAWING: Figure 2

Description

  TECHNICAL FIELD The present invention relates to a molded article which is excellent in liquid repellency and to which liquid droplets are not easily attached to the surface, a home appliance using the same, a member for toilets, and a toilet seat.

  In the past, efforts have been made to impart antifouling properties to product surfaces for the purpose of reducing labor for cleaning. Also for resins widely used in home appliances and the like, it is attempted to impart antifouling properties by surface coating or the like.

  One indicator of antifouling properties is the falling angle of droplets on the surface of the molded body.

  The falling angle is the angle at which the droplet 1 starts to slide on the surface of the compact 2 by gradually tilting the compact 2 on which the droplet 1 is placed from the horizontal position, as shown in FIG. .

  The droplet 1 is more easily removed from the surface of the molded body 2 as the sliding angle approaches 0 degree, and the droplet 1 is less likely to be separated from the surface of the molded body 2 as the sliding angle is larger.

  The surface coating is one means for improving the antifouling property, and after forming the part, a coating agent containing a wax or the like is applied to the surface of the molded article in a later step to impart the antifouling property.

  For example, Patent Document 1 proposes a structure in which an olefin-based wax layer is formed to a thickness of 1 to 30 μm on a surface made of resin. By using the wax layer in a suitable heating environment in which it liquefies, it is possible to enhance the slipperiness with respect to the contents (such as a source) and prevent the adhesion and the remaining.

  Further, Patent Document 2 provides a laminate having a seal layer made of a styrene resin or an ethylene resin, and a paraffin wax layer having a thickness of 0.5 to 5 μm adjacent to the seal layer. The seal strength is high even when heat sealing is performed at a low sealing temperature, and it is possible to make it difficult for liquids such as coffee drinks and milk drinks to adhere.

Unexamined-Japanese-Patent No. 2016-23298 JP 2012-245760 A

  The structure molded using the resin described in Patent Document 1 improves slipperiness by liquefying the wax layer on the surface, and the surface is sticky at the time of use, and it is difficult to use for a product touched by people. In addition, the film thickness is thick, and the characteristics (such as appearance) of the base resin may not be fully utilized, which may lead to an increase in cost.

  Further, since the resin is coated on the resin surface, the wax does not exist inside the resin. Therefore, when the surface wax layer peels off, there is no wax inside, so the performance does not recover. In addition, since the olefin-based wax which has been heated to become a liquid is applied to the resin by using a spray spray, a roller or the like and co-extrusion, the number of processes is increased.

  In addition, since the laminate described in Patent Document 2 has a coating layer containing paraffin wax applied to the surface of the seal layer, the post-process is added, the number of processes is increased, and the appearance may be changed. . Moreover, since it is coated, paraffin wax exists only on the surface, and when the surface wax layer peels off or loses, the performance does not recover because there is no wax inside.

  In order to solve the above-mentioned conventional subject, it is a forming object containing base resin and olefin system wax, and forming an olefin system wax layer in at least one copy of the surface of an forming object at the time of forming, thickness of the olefin system wax It is a molded object which is more than 0 and less than 500 nm.

  In the molded article of the present disclosure, since an olefin wax layer is formed on the surface at the time of molding, the lubricating property, the water repellency, the antifouling property, the sliding property and the like can be obtained without increasing the number of steps. In addition, since an olefin wax is also present inside the resin, it is excellent in antifouling property also with time. In addition, since the thickness of the wax layer is thin, the characteristics of the resin can be utilized.

Illustration of the falling angle (A) is a cross-sectional view showing a state in which a layer of olefin wax 5 is uniformly formed on the surface of molded body 3, (b) and (c) are layers of olefin wax 5 on the surface of molded body 3 Is a sectional view showing a partially formed state of Photomicrograph of a molding containing an olefin wax Photomicrograph of a molded product containing no olefin wax Toilet device and perspective view of its members Partial cross section of toilet seat

  The first disclosed molded article is a molded article containing a base resin and an olefin wax, and an olefin wax layer is formed on at least a part of the surface of the molded article during molding, and the thickness of the olefin wax is 0. It is a molded object which is larger than 500 nm.

  By forming the olefin-based wax layer on the surface, synovial property and the like can be obtained. In addition, since an olefin-based wax layer can be obtained at the time of molding, additional steps such as coating do not occur, and the number of processes does not increase.

  In addition, by forming a thin olefin wax layer on the surface of the molded product at the time of molding and dispersing the olefin wax also inside the molded product, it is possible to obtain a molded product excellent in both initial performance and time-lapse performance. it can.

  In addition, since the olefin wax layer is thin, it is possible to maintain the characteristics of the base resin, such as appearance and strength as much as possible. Furthermore, the possibility of peeling and the like is low because the olefin wax layer and the base resin are integrated.

  Moreover, since it is excellent also in slidability, even when dirt adheres to the surface, the surface slipperiness is good and the wiping performance is improved.

  In the second disclosed molded article, the falling angle of droplets on the surface of the molded article is 90 ° or less.

As a result, it is possible to obtain a molded article in which the droplets adhering to the surface of the molded article are easily slipped off and dirt is less likely to adhere.

  In the third disclosed molded article, the melting point of the olefin wax is lower than the melting point of the base resin, and is 40 ° C. or higher.

  Since the melting point of the olefin wax is lower than the melting point of the base resin, the base resin is solidified first during molding, and the additive is extruded by the injection pressure while maintaining the fluidity, so it is considered that the additive easily moves to the surface. Therefore, it is considered that the additive is more likely to be distributed on the surface than in the inside of the molded body, and the effect of the additive is likely to be exhibited.

  In addition, since the wax on the surface does not liquefy when the dirt adheres because it is solid at normal temperature by having a melting point of 40 ° C. or higher, it is difficult to wipe the wax together at the time of wiping the dirt, There is no decline in sex.

  Moreover, since it is hard to liquefy, even if it uses for the part which a person touches, the surface does not stick easily and it can be used comfortably.

  In the molded body disclosed in the fourth, the base resin is polypropylene.

  Since the base resin is polypropylene, it does not repel the olefin wax and disperses inside as well, even if the surface is scraped by abrasion etc., the olefin wax easily stays inside and the durability is also excellent. A molded body can be obtained. In addition, since the Tg of polypropylene is about 0 ° C., the olefin wax can also move to the surface of the amorphous part of polypropylene around normal temperature, so that the performance is excellent over time.

  Moreover, since it is a resin excellent in chemical resistance, it is excellent in durability even in a part that touches a detergent or a drug.

  The household appliances disclosed in the fifth use the molded body described above.

  By using the above-described molded article for household appliances, the droplets adhering to the surface are likely to slide down the surface, so the contamination is difficult to adhere, and even when the contamination is adhered, the wiping performance improvement effect can be expected.

  Therefore, it is possible to obtain a home appliance which is extremely excellent in antifouling properties.

  Among them, the adhesion suppressing effect is particularly excellent for not only horizontal members but also members or products having an inclination or members or products having a surface to be antifouling directed downward.

  Moreover, since a function is given at the time of shaping | molding, the additional process of coating etc. is not required, it does not lead to a man-hour increase and it is easy to introduce also into a household appliance.

  The toilet member disclosed in the sixth uses the molded body described above.

  In particular, when the molded body is used as a toilet member, it is difficult for urine stains and the like to adhere, and even when it adheres, it is easy to wipe off, and the antifouling effect is high.

  The seventh disclosed toilet seat is a toilet seat using the molded body described above, wherein the toilet seat is composed of a lower part and an upper part, and the lower part is molded using a resin containing an olefin wax, the upper part The part is a toilet seat molded using a resin containing no olefin wax.

  The lower part is installed facing the toilet bowl, and the upper part is a seat. Therefore, resin containing wax is used to impart a liquid adhesion suppression function to the lower part where urine stains are easily scattered, and the upper part is made of resin that does not contain wax, so it is more cost-effective. Excellent.

  In the toilet seat disclosed in the eighth aspect, a heater or a tape is attached to the upper part.

  Parts molded with resin containing olefin wax have good slipperiness and it becomes difficult to get tape etc. However, since the upper part does not contain olefin wax, it peels off the tape for sticking heater or heater etc. This is suppressed.

  In the toilet seat disclosed in the ninth aspect, the surface of the upper part is kept at 35 ° C to 40 ° C by a heater.

  Since paraffin wax having a melting point of 40 ° C. or higher is used, the paraffin on the surface does not become liquid even when heated by a heater, and the wax is not wiped together when wiping off dirt, Stain resistance is unlikely to decrease.

  The toilet seat of the tenth disclosure contains an antibacterial agent in the upper part.

  Both the upper part and the lower part may contain an antibacterial agent, but when an olefin wax and an antibacterial agent are used in combination, either the olefin wax or the antibacterial agent comes out on the surface, and either one is less effective. There is also the possibility. Since the upper part is a part that is directly touched by people, the effect of the antibacterial agent can be exhibited as much as possible, and therefore the effect of the antibacterial agent can be easily exhibited without containing an olefin wax.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited by the embodiment.

Embodiment 1
The molded body 3 disclosed in the present invention is assumed to be used for products, parts, structures and the like for which antifouling properties and droplet adhesion suppression are required, but is not limited thereto.

  The material of the base of the molded body 3 is not particularly specified as long as the molded body 3 can maintain its shape in a durable manner. The molded body 3 can be freely selected in consideration of the required appearance quality, mechanical physical properties, water repellency, durability, functionality, transparency, cost and the like.

  For example, polyethylene, polypropylene, polystyrene, AS resin, ABS resin, acrylic resin, polycarbonate, polyethylene terephthalate, polymethyl methacrylate, polyamide, polyvinyl chloride, polyacetal, polyvinyl alcohol, polylactic acid, polyester, polytetrafluoroethylene, polymethyl It can be appropriately selected from pentene, cycloolefin polymer, polyphenylene sulfide, polysulfone, polyamide imide and the like, and it is not particularly specified.

  Moreover, although a homopolymer, a block copolymer, a random copolymer etc. can be used as a polypropylene, a copolymer with other resin is used, or ethylene-propylene copolymer, a polybutadiene, a polyisoprene, a styrene- ethylene- butadiene- styrene A material blended with an elastomer such as a block copolymer (SEBS) can also be used.

  In addition, a mixture of plural types of resins may be used for the molded body.

  In order to impart the required mechanical properties, thermal properties, liquid repellency and the like, additives made of inorganic, organic and mixtures thereof may be contained in the molded body.

  For example, antioxidants, flame retardants, ultraviolet light absorbers, light stabilizers, metal deactivators, antistatic agents, antifogging agents, nucleating agents, antibacterial agents, antifungal agents, foaming agents, stabilizers, plasticizers, Fillers, reinforcing materials, fibers, pigments, rubber components, water repellents, slidability improvers, oils, etc. may be contained, or two or more of them may be contained.

  As the olefin-based wax, known ones can be used, and one having a melting point of 40 ° C. or more and a melting point of the base resin or less is used. For example, if the base resin is polypropylene, the melting point of polypropylene is often about 130-165 ° C.

  As the olefin-based wax, various olefin-based waxes can be used. For example, Nofalloy (registered trademark), High Wax (TM), etc. may be used. Moreover, you may use multiple types.

  The film pressure of the olefin-type wax layer formed on the surface of the molded body 3 is less than 500 nm. The olefin-based wax layer less than 500 nm may be formed on at least a part of the molded product, and if necessary, there may be a site without a wax layer or a site with a large film thickness.

  By setting the film thickness of the olefin wax layer to less than 500 nm, preferably 400 nm or less of the lower limit of visible light wavelength, the appearance of the paraffin wax layer on the surface is less affected, and the color, texture, gloss, etc. of the polypropylene resin The original appearance can be easily maintained.

  In the cross-sectional direction, there may be a concentration gradient in which the surface layer has a higher concentration of olefin wax and the center portion has a lower concentration of olefin wax.

  Furthermore, it is also possible to contain a silicone oil such as silicone oil or silicone resin, a fluorine-based or olefin-based water repellent additive.

  In addition, in order to improve the dispersibility and performance of the additive, for example, a material in which an olefin wax or the like is dispersed or bound in advance in a suitable resin may be used. At this time, the resin may be a plurality of types or polymers.

  Further, by adding an inorganic substance such as glass fiber or talc, it is also possible to improve strength and the like. In addition, fillers such as calcium carbonate, titanium oxide, zinc oxide, barium sulfate, mica, aluminum hydroxide, antimony oxide, calcium phosphate, glass balloons, pigments, flame retardants, etc. can also be used.

  Furthermore, an antimicrobial agent may be contained. As an antibacterial agent, one or more of Ag, Zn, Cu, etc., or those supported on a carrier such as silica, alumina, zeolite, phosphate, silicate, etc., or an organic antibacterial agent There are natural organic antimicrobial agents, etc., but they are not particularly designated.

  The molded body is produced by injection molding, extrusion molding, blow molding, compression molding or the like.

  For example, injection molding refers to melting a material in a heated cylinder, injecting and pressing the molten material into a mold, and cooling to obtain a molded article.

  Materials used for injection molding, that is, materials such as base resin, olefin wax and other additives, other resin materials, rubber materials, etc. are mixed in advance or mixed with a twin-screw kneader or the like to make the materials as homogeneous as possible It is desirable to pelletize. Alternatively, it is also possible to use olefin wax as a masterbatch.

  In the present embodiment, polypropylene is used as the base resin, and polypropylene having an MFR of 3 to 70 g / min is often used.

  In addition, molded articles as described above are casings or parts of household appliances such as washing machines, air conditioners, refrigerators, rice cookers, jar pots, mixers, toilet parts such as toilet seats and body cases, or floors or walls of bathrooms, Building materials such as ceilings and bathtubs, housing products, portable toilets and toilets for children, and also automobile parts, bumpers, containers for food and household goods, industrial products, cosmetics, etc. It can be used for the target product or part.

(Example)
Hereinafter, examples according to the present disclosure will be more specifically described. The present invention is not limited by this embodiment.

  In FIG. 2, a part of cross-sectional schematic diagram of the molded object of this indication is shown.

  FIG. 2A is a cross-sectional view showing a state in which the layer of the olefin wax 5 is uniformly formed on the surface of the molded body 3. FIGS. 2B and 2C are cross-sectional views showing a state in which the layer of the olefin wax 5 is partially formed on the surface of the molded body 3.

  The molded body 3 is molded after kneading the olefin wax 5 into the base resin 4 at the time of kneading. By molding, a layer of olefin wax 5 is formed on the surface layer of the molded body 3. Since the melting point of the additive is lower than the melting point of the base resin at the time of molding, the base resin is solidified first at the time of molding, and the additive is extruded by injection pressure while maintaining fluidity, so it is considered to be easy to move to the surface . Therefore, it is considered that the additive is more likely to be distributed on the surface than in the inside of the molded product, and the effect of the additive is likely to be exhibited. The olefin-based wax 5 may be present continuously or discontinuously in the surface layer of the molded body 3 or in a dispersed state inside. The entire surface layer of the molded body 3 may not be covered with the olefin wax layer, and at least a part of the surface layer may be covered with a layer less than 500 nm. The wax layer may be dispersed like sea-island on the surface layer of the molded body 3.

  Although it is assumed that the olefin-based wax 5 layer is wiped off by cleaning the molded body 3 etc., the presence of the olefin-based wax also inside the molded body 3 keeps the performance to some extent even if the surface layer is wiped off Be done. Furthermore, it is also conceivable that the performance can be recovered by gradually bleeding the inside of the molded body 3 to the surface of the molded body 3 and maintaining the olefin-based wax 5 layer on the surface of the molded body 3.

  In addition, the olefin type wax 5 is represented typically in FIG. 2, and a shape and a magnitude | size are not the limits shown in FIG.

  The side surfaces of the molded body 3 are also in the same state.

In this embodiment, polypropylene as a base resin, olefin wax as an additive, an antioxidant and a reinforcing material, a rubber material, other additives, etc. are kneaded and pelletized by a twin-screw kneader, and then are injected by an injection molding machine. It shape | molded and obtained the molded object 3 of each Example. The melting point of polypropylene was about 160 ° C.

  At this time, additives that have already been made into a masterbatch, resins and additives that should not be mixed may be mixed before molding, without being biaxially mixed, and in particular those that are designated Absent.

  Next, the evaluation method of the synovial property on the surface of the molded body 3 will be shown below.

  The sliding angle of 5 μL of distilled water was selected as a representative index of synovial fluid. The contact angle meter DM-501 of Kyowa Interface Science Co., Ltd. was used for measurement of the falling angle. In the case where the droplet does not fall even when the substrate surface is vertical, it is described as> 90 °.

Example 1
The molded object 3 was produced by the said manufacturing method, and evaluation was performed.

  The molded product was formed into a flat plate by mixing and pelletizing 100 parts of polypropylene as the base resin 4, 1 part of the olefin wax 5 having a melting point of about 70 ° C., and other antioxidants, colorants and the like.

  The water sliding angle was 40 ° when it was performed at 5 μL.

(Example 2)
The molded object 3 was produced by the said manufacturing method, and evaluation was performed.

  Molded body 3 was prepared by mixing and pelletizing 100 parts of polypropylene as base resin 4, 1 part of olefin wax 5 having a melting point of about 70 ° C., 5 parts of talc, other antioxidants, coloring agents, etc. .

  The water sliding angle was 73 ° when it was performed at 5 μL.

(Example 3)
The molded object 3 was produced by the said manufacturing method, and evaluation was performed.

  Molded body 3 is mixed with 100 parts of polypropylene as base resin 4, 3 parts of olefin wax 5 having a melting point of about 70 ° C., 5 parts of talc, other antioxidants, coloring agents, etc. did.

  The contact angle / slip angle of water was 109 ° / 41 ° when it was carried out at 5 μL. Moreover, when it carried out by 20 microliters, it was 108 degrees / 18 degrees.

  In addition, the appearance was almost the same as that without the addition of the olefin wax.

  Moreover, cross-sectional TEM (transmission electron microscope) observation of the surface layer of the center part of the molded object 3 of a present Example was performed. The results are shown in FIG. FIG. 3 is a TEM cross-sectional photograph of a resin containing an olefin wax. Further, as a comparison, a TEM cross-sectional photograph of a resin not containing an olefin wax is shown in FIG.

  As pretreatment, epoxy resin embedding, staining, and ultrathin section preparation were performed. The magnification of the photograph is 100,000.

  In FIG. 3, it can be seen that a layer of olefin wax 7 is formed on the surface of polypropylene resin 6. The thickness of the layer of olefin wax 7 is about 40 nm. The portion 8 which looks black inside the polypropylene resin 6 is considered to be an inorganic substance or a rubber component. Also, although it is thought that an olefin wax is also present inside, it can not be confirmed in this photo. The reason may be that it does not exist in this area or cross section, or is not reflected because it is thin in density.

  On the other hand, FIG. 4 is a cross section of the resin to which the olefin wax is not added, and the wax layer can not be seen on the surface of the polypropylene resin 6. There is a thin black part on the surface, which is the effect of embedding in epoxy resin, and it is not paraffin because lamellar crystals are observed. The portion 8 which looks black inside the polypropylene resin 6 is considered to be an inorganic substance or a rubber component.

(Example 4)
The molded object 3 was produced by the said manufacturing method, and evaluation was performed.

  Molded body 3 was prepared by mixing and pelletizing 8 parts of olefin wax 5 having a melting point of about 70 ° C., 5 parts of talc, other antioxidants, coloring agents, etc. in 100 parts of polypropylene as base resin 4 to form a flat plate. .

  The water sliding angle was 45 ° when it was performed at 5 μL.

  Also, compared to Example 3, the film thickness seems to be slightly thicker.

(Comparative example 1)
The molded object 3 was produced by the said manufacturing method, and evaluation was performed.

  The molded body 3 knead | mixed and pelletized 5 parts of talc, other antioxidants, a coloring agent etc. with 100 parts of polypropylene as the base resin 4, and shape | molded the flat plate.

  The sliding angle of water was> 90 ° when performed at 5 μL.

  By not containing the olefin wax, the droplets did not slide down, tended to be in the adhered state, and the stain resistance was reduced.

(Comparative example 2)
An olefin wax was coated on a polypropylene resin to a thickness of about 10 μm.

  A whitish haze occurred on the surface, and in some places it became mottled and the appearance deteriorated.

Second Embodiment
FIG. 5 shows a toilet apparatus and its members using the material of the present invention.

  In FIG. 5, 9 is a toilet apparatus, 10 is a toilet seat, 11 is a main body, 12 is a toilet bowl, 13 is a toilet lid, 14 is a washing nozzle, and 15 is an operation unit.

  FIG. 6 is a partial cross-sectional view of the toilet seat.

  As shown in FIG. 6, the toilet seat 10 includes, from the upper surface side, an upper toilet seat casing 310, a toilet seat heater 330 in which a cord heater 332 is disposed on a heat spreader 331 made of aluminum foil, and a heat insulator 340 made of expanded polystyrene. Lower toilet seat casing 320 is configured as a main component.

  The material of the upper toilet seat casing 310 may be any material as long as the toilet member can maintain its shape in a durable manner, and is not particularly specified. The toilet member can be freely selected in consideration of the required appearance quality, mechanical physical properties, water repellency, durability, functionality, transparency, cost and the like. In the present embodiment, a polypropylene resin is used.

  The lower toilet seat casing 320 is formed by using a polypropylene resin as a base resin and kneading and pelletizing 3 parts of an olefin wax having a melting point of about 70 ° C. into 100 parts of a polypropylene resin, as in Example 3. There is.

  The lower toilet seat casing 320 is mixed with a sliding additive of olefin wax having a melting point of about 70 ° C. The olefin wax has a melting point lower than that of the polypropylene resin, so it is easy to be dispersed in the polypropylene resin at the time of kneading and molding, and a sufficient antifouling effect can be exhibited. Since the olefin wax has a low melting point and high fluidity in the resin composition at the time of molding, a phenomenon occurs in which the olefin wax moves toward the surface of the molded body. As a result, the proportion of the olefin-based wax present on the surface of the molded article is high, and a high degree of stain resistance and abrasion resistance can be achieved.

  The upper toilet seat casing 310 and the lower toilet seat casing 320, when completed, have their inner and outer peripheries joined to each other and have a hollow annular inside.

  In the toilet seat heater 330, a cord heater 332 covered with a soft vinyl chloride insulation coating is provided on the surface of a heat spreader plate 331 formed of a substantially horseshoe-shaped aluminum foil with a portion of the front cut off. It is provided so as to meander, and the heat generated by the cord heater 332 is conducted to the heat equalizing plate 331 and diffused to the entire surface of the heat equalizing plate 331. The seat heater 330 is provided with a cord heater 332 so that the entire seating surface can be heated, and in particular, the density is changed depending on the location so that the thighs and buttocks of the seated user can be comfortably heated. is there.

  Further, on the surface of the heat spreader plate 331, a thermistor as temperature detecting means (not shown) and a thermostat as overheat preventing means are installed, and the cord heater 332, the thermistor and the thermostat are connected by lead wires.

  The toilet seat heater 330 in the present embodiment maintains the upper surface of the upper toilet seat casing 310 in a state of being kept warm at the set temperature. The set temperature can be changed according to the preference of the user by an operation switch (not shown) and can be adjusted in the range of 35 ° C. to 40 ° C. The upper surface temperature of the upper toilet seat casing 310 is set to 40 ° C. in order to prevent a user from burns.

  The toilet seat heater 330 is attached to the upper toilet seat casing 310 with a double-sided tape or the like. In the lower toilet seat casing 320, since an olefin wax is kneaded, a double-sided tape or the like is easily peeled off. Since the toilet seat heater 330 is attached to the upper toilet seat casing 310 where the olefin wax is not kneaded, peeling of the toilet seat heater 330 is suppressed.

The heat insulating material 340 is integrally formed of expanded polystyrene foam which is an independent foam, and has a substantially horseshoe shape. The shapes of the inner circumference and the outer circumference of the heat insulating material 340 are formed to be substantially similar to the shapes of the inner circumference and the outer circumference of the upper toilet seat casing 310, and cover the front toilet side of the upper toilet seat casing 310 and the toilet seat heater 330 It has a shape that can

  The toilet seat heater 330 arranges the cord heater 332 so as to increase the calorific value of both sides in contact with the thighs of the seated user, and the heat insulator 340 insulates the main part of the toilet seat heater 330 It is a structure. An adiabatic space 305 is formed between the lower surface of the heat insulator 340 and the lower toilet seat casing 320.

  Heat transferred downward by radiation and convection from the toilet seat heater 330 is suppressed by the heat insulating material 340 from moving downward.

  By attaching the toilet seat heater 330 to the lower surface of the upper toilet seat casing 310 and arranging the heat insulating material 340 below the toilet seat heater 330, transfer of heat of the toilet seat heater 330 to the lower toilet seat casing 320 is suppressed.

  The lower toilet seat casing 320 is mixed with an olefin wax, and the proportion of the olefin wax on the surface of the lower toilet seat casing 320 is high. The paraffin wax of the lower toilet seat casing 320 becomes liquid at the melting point or a temperature close to the melting point. When the user wipes off the dirt on the lower toilet seat casing 320 in the liquid state, the sliding additive that has become fluid along with the dirt is also wiped off, and the stain resistance may be reduced.

  In the present embodiment, since the heat insulating material 340 is disposed below the toilet seat heater 330, the thermal influence of the toilet seat heater 330 on the lower toilet seat casing 320 is very small.

  Further, since the olefin wax having a melting point of about 70 ° C. is used, the lower toilet seat casing 320 does not reach the temperature at which the sliding additive becomes liquid even when the heat insulating material 340 is not used. For example, in summer, the toilet space is expected to reach 40 ° C. Even if it reaches 40 ° C., it does not become liquid because it uses an olefin wax having a melting point of about 70 ° C. . Therefore, even when cleaning is performed, the layer of the olefin wax formed on the surface of the lower toilet seat casing 320 is not wiped off. It is assumed that the layer of olefin wax on the surface of lower toilet seat casing 320 is gradually wiped off by cleaning for a long time use, but since olefin wax is also present inside, even if the surface layer is wiped off Antifouling performance is maintained.

  In the present embodiment, the sliding additive having a melting point of about 70 ° C. is used, but if the melting point is 55 ° C. or more, it does not become liquid even when the temperature of the toilet space reaches 40 ° C. Even if the user wipes off the dirt, the olefin-based wax on the surface of the lower toilet seat casing 320 is not wiped off. Alternatively, a sliding additive having a melting point of about 40 ° C. may be used. If the melting point is about 40 ° C., it is assumed that when the temperature in the toilet space reaches 40 ° C., part of the slidable additive becomes liquid. However, even if it becomes liquid, the decrease in antifouling property is suppressed because it is a small amount.

  Moreover, the toilet seat which consists of the lower toilet seat casing which does not contain an olefin wax in an actual toilet use environment, and the stain resistance were compared. In the toilet seat using the lower toilet seat casing containing the olefin wax, the adhesion of the urine stain was suppressed to about 1/2 or less as compared with the toilet seat not containing it, and the adhesion suppressing effect was confirmed. In addition, it was also confirmed that the attached dirt was easy to wipe off.

  As described above, since the molded product according to the present disclosure is resistant to liquid contamination and easy to wipe and clean, it can be used for household appliances, housing-related products, automobile parts, industrial machine parts, consumables, household goods, etc. It can be applied to applications.

DESCRIPTION OF SYMBOLS 1 droplet 2 molded object 3 molded object 4 base resin 5 olefin type wax 6 polypropylene resin 7 olefin type wax 8 inorganic substance or rubber component 9 toilet device 10 toilet seat 11 main body 12 toilet bowl 13 toilet lid 14 cleaning nozzle 15 operation part 305 heat insulation space 310 Upper toilet seat casing 320 Lower toilet seat casing 330 Toilet seat heater 331 Soaking plate 332 Code heater 340 Insulation material

Claims (10)

A molded article comprising a base resin and an olefin wax, wherein an olefin wax layer is formed on at least a part of the surface of the molded article during molding, and the thickness of the olefin wax is greater than 0 and less than 500 nm. The molded article according to claim 1, wherein the falling angle of droplets on the surface of the molded article is 90 ° or less. The molded article according to any one of claims 1 to 2, wherein the melting point of the olefin wax is lower than the melting point of the base resin and has a melting point of 40C or higher. The molded article according to any one of claims 1 to 3, wherein the base resin is polypropylene. The household appliance which used the molded object as described in any one of the said Claims 1-4. The member for toilets using the molded object as described in any one of the said Claims 1-4. It is a toilet seat using the molded object as described in any one of the said Claims 1-4, Comprising: The said toilet seat is comprised from a lower part and an upper part, and a lower part is shape | molded using resin containing an olefin wax. , The upper part is a toilet seat molded using resin that does not contain olefin wax. The toilet seat according to claim 7, wherein a heater or a tape is attached to the upper part. The toilet seat according to claim 8, wherein the upper part surface is kept at 35 ° C to 40 ° C by a heater. The toilet seat according to any one of claims 7 to 9, wherein the upper part comprises an antimicrobial agent.