JP2016202753A - Heated toilet seat foam and heated toilet seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heated toilet seat foam capable of suppressing deformation of a foam, and achieving power saving of the heated toilet seat, even when it is used for a long period in a condition in which, a load similar to a body weight of a human being is applied in the vicinity of a heat source.SOLUTION: There are provided a heated toilet seat foam characterized in that, a heat deformation temperature (HDT) measured in accordance with JIS K 7191 is equal to or higher than 60°C, and a heated toilet seat containing the same heated toilet seat foam.SELECTED DRAWING: Figure 1

Description

  The present invention can achieve the suppression of foam deformation and the power saving of a heating toilet seat over a long period of time, even when used for a long period of time under a condition that a human body weight is applied near a heat source. The present invention relates to a foam for a heating toilet seat and a heating toilet seat.

  In recent years, studies on increasing energy efficiency in various fields have been conducted from the viewpoint of energy saving. In heating toilet seats, the point is how to transfer the heat of the heater to the seating surface without loss.

  In order to increase thermal efficiency, it is common to use a heat insulating material so that heat is not transmitted in a direction other than a desired direction, and a foam is often used as a heat insulating material because of its simplicity.

  As a method of using a foam, there is known a method of eliminating a hollow portion inside a toilet seat by integrally molding a foam and a heater (Patent Document 1). A method using a sheet in which a skin, a heat generating layer, and a foamed layer are laminated is also known (Patent Document 2).

Japanese Patent Laid-Open No. 11-299697 JP 2010-162072 A

However, in patent document 1, the detail regarding the foam which is a heat insulating material is not described, and long-term performance stability is not considered at all.
Patent Document 2 describes that the heat insulating layer is a thermoplastic resin. Here, the thermoplastic resin is deformed by heat, and the deformation temperature is determined by the melting point and glass transition temperature of the resin. And even if it is below a deformation temperature, a thermoplastic resin will deform | transform by being exposed to that temperature for a long period of time, or will deteriorate by oxidation etc. However, Patent Document 2 does not mention thermal insulation under conditions exposed to heat for a long period of time, and the energy saving effect cannot be sustained even in long-term use.

  Therefore, the present invention can achieve the suppression of foam deformation and the power saving of the heating toilet seat over a long period of time even when used for a long period of time under the condition that a load of about the human weight is applied near the heat source. An object is to provide a heating toilet seat foam and a heating toilet seat.

The present invention includes the following [1] to [5].
[1] A foam for heating toilet seats, wherein a deflection temperature under load (HDT) measured at a thickness of 10 mm in accordance with JIS K7191 is 60 ° C. or higher.
[2] The heating toilet seat foam according to [1], which is made of a thermoplastic resin.
[3] The foam for a heating toilet seat according to [1] or [2], wherein the thermoplastic resin includes a polyphenylene ether resin.
[4] The heating toilet seat foam according to [1] or [2], wherein the thermoplastic resin includes a polycarbonate resin.
[5] A heating toilet seat comprising the foam for heating toilet seat according to any one of [1] to [4].

  According to the present invention, the foam can be prevented from being deformed even if it is used for a long period of time under the condition that a human body weight is applied near the heat source, so that a gap is generated between the skin or the heater and the foam. This makes it possible to maintain excellent heat insulation, and achieve power saving over a long period of time.

It is a top view which shows the heating toilet seat of this embodiment containing the foam for heating toilet seats of this embodiment. (A) is sectional drawing when the foam for heating toilet seats of this embodiment is cut | disconnected by the surface along line II shown in FIG. 1, (b) is foaming for heating toilet seats of this embodiment. It is sectional drawing when the heating toilet seat of this embodiment containing a body is cut | disconnected by the surface in alignment with line II shown in FIG.

  Hereinafter, a mode for carrying out the present invention (hereinafter simply referred to as “the present embodiment”) will be specifically described. In addition, this invention is not limited to the following embodiment, It can implement by changing variously within the range of the summary.

(Foam for heating toilet seat)
The foam of this embodiment is used suitably for a heating toilet seat.
And the foam for heating toilet seats of this embodiment is a thing whose load deflection temperature (HDT) in thickness of 10 mm is 60 degreeC or more.
The deflection temperature under load (HDT) is the temperature at which a sample is heated under a certain load and reaches a specified deflection, and is measured according to JIS K7191. Point to.

  In order for the foam to fulfill its function as a heat insulating material, it does not deform even if it is placed in the vicinity of the heater for a long period of time, and it needs to remain in close contact with the skin and does not cause an excessive gap with the heater. Thereby, since it can suppress that the heat of a heater is spread | diffused in directions other than a desired direction, the power consumption of a heater can be suppressed.

  Here, if the HDT is 60 ° C. or higher, it is not only deformed when heat is applied, but also deformation can be suppressed and heat insulation can be maintained even under load conditions due to human seating.

Furthermore, if the HDT is 60 ° C. or higher, it becomes easy to obtain an energy saving effect by thinning the skin in a heated toilet seat in which a foam is covered with the skin. That is, since foam is usually flexible and easily deforms when a load is applied, it is necessary to increase the thickness of the skin that plays a role in suppressing the deformation. It becomes difficult to make the epidermis thinner. Thereby, compared with the case where HDT is lower, since the heat from the heater is easily transmitted to the human body through the epidermis, the set temperature of the heater can be lowered and the power consumption can be suppressed.
Normally, the heater power is turned off when a person is not seated, and the power is turned on at the same time as the seating is started and heating starts.When the skin becomes thin, the speed at which the heat is transmitted from the heater increases. It is possible to shorten the time until the predetermined temperature is reached. Thereby, in addition to suppressing the heater power consumption, there is an advantage that the comfort of the user is increased.

  From the viewpoint of enhancing the effect of the present invention, the deflection temperature under load (HDT) of the foam for heating toilet seat of this embodiment is preferably 70 ° C. or more, and particularly preferably 80 ° C. or more. preferable.

Although the raw material of the foam for heating toilet seats of this embodiment is not specifically limited, For example, polyolefin resin, polystyrene resin, polyphenylene ether resin, polyamide resin, polyester resin, polyurethane resin, polycarbonate resin, etc. A synthetic resin, glass wool, etc. are mentioned.
These may be used alone or in combination of two or more.

  Among the raw materials, a thermoplastic resin is preferable from the viewpoint of processability, and among the thermoplastic resins, a polystyrene resin, a polyphenylene ether resin, and a polycarbonate resin are particularly preferable from the viewpoint of processability and heat insulation. From the balance between properties and rigidity, polyphenylene ether resins and polycarbonate resins are more preferable.

In the present specification, the polystyrene-based resin refers to a copolymer mainly composed of styrene and a styrene derivative in addition to a homopolymer of styrene and a styrene derivative.
Here, as styrene derivatives, o-methylstyrene, m-methylstyrene, p-methylstyrene, p-tert-butylstyrene, α-methylstyrene, β-methylstyrene, diphenylethylene, p-chlorostyrene, o-bromo Examples thereof include, but are not limited to, styrene and p-bromostyrene.

Examples of the homopolymer polystyrene-based resin include, but are not limited to, polystyrene, poly-α-methylstyrene, polychlorostyrene, and the like, and polystyrene is particularly preferable from the viewpoint of processability.
Examples of the copolymer polystyrene resin include, but are not limited to, for example, styrene-butadiene copolymer, styrene-acrylonitrile copolymer, styrene-maleic acid copolymer, styrene-maleic anhydride copolymer, styrene. -Maleimide copolymer, styrene-N-phenylmaleimide copolymer, styrene-N-alkylmaleimide copolymer, styrene-N-alkyl-substituted phenylmaleimide copolymer, styrene-acrylic acid copolymer, styrene-methacrylic acid Copolymer, styrene-methyl acrylate copolymer, styrene-methyl methacrylate copolymer, styrene-n-alkyl acrylate copolymer, styrene-n-alkyl methacrylate copolymer, ethyl vinyl benzene-divinyl benzene copolymer; Acrylonitrile bu Ternary copolymers such as diene-styrene (ABS), butadiene-acrylonitrile-α-methylbenzene copolymer; styrene graft polyethylene, styrene graft ethylene-vinyl acetate copolymer, (styrene-acrylic acid) graft polyethylene, styrene Examples include graft copolymers such as graft polyamide, and styrene-acrylonitrile copolymer, styrene-methacrylic acid copolymer, and styrene-grafted polyethylene are particularly preferable from the viewpoint of heat resistance and processability.
These may be used alone or in combination of two or more.

A rubber component may be added to the polystyrene resin for the purpose of improving impact resistance. The rubber component may be uniquely blended or may be impact resistant polystyrene (HIPS).
In addition, for the purpose of improving heat resistance, a compatible resin such as polyphenylene ether may be added to the polystyrene resin.

［式中、Ｒ¹、Ｒ²、Ｒ³及びＲ⁴は、それぞれ独立して、水素、ハロゲン、アルキル基、アルコキシ基、フェニル基、又はハロゲンと一般式（１）中のベンゼン環炭素との間に少なくとも２個の炭素原子を有するハロアルキル基若しくはハロアルコキシ基を示し、ここで、ベンゼン環のα位に位置する炭素原子は２個以下であり、ｎは、重合度を表す整数を示す。］ In this specification, the polyphenylene ether resin refers to a polymer represented by the following general formula (1).

[Wherein, R ¹ , R ² , R ³ and R ⁴ are each independently hydrogen, halogen, alkyl group, alkoxy group, phenyl group, or halogen and the benzene ring carbon in the general formula (1). A haloalkyl group or a haloalkoxy group having at least two carbon atoms in between is shown. Here, the number of carbon atoms located at the α-position of the benzene ring is 2 or less, and n represents an integer representing the degree of polymerization. ]

In the foam of this embodiment, among these, in the general formula (1), R ¹ and R ² are alkyl groups having 1 to 4 carbon atoms, and R ³ and R ⁴ are hydrogen or 1 carbon atom. Those having an alkyl group of ˜4 are preferred.

Examples of the polyphenylene ether resin include, but are not limited to, poly (2,6-dimethyl-1,4-phenylene) ether, poly (2,6-diethyl-1,4-phenylene) ether, and poly (2 -Methyl-6-ethyl-1,4-phenylene) ether, poly (2-methyl-6-propyl-1,4-phenylene) ether, poly (2,6-dipropyl-1,4-phenylene) ether, poly (2-ethyl-6-propyl-1,4-phenylene) ether, poly (2,6-dibutyl-1,4-phenylene) ether, poly (2,6-dilauryl-1,4-phenylene) ether, poly (2,6-diphenyl-1,4-diphenylene) ether, poly (2,6-dimethoxy-1,4-phenylene) ether, poly (2,6-diethoxy) 1,4-phenylene) ether, poly (2-methoxy-6-ethoxy-1,4-phenylene) ether, poly (2-ethyl-6-stearyloxy-1,4-phenylene) ether, poly (2,6 -Dichloro-1,4-phenylene) ether, poly (2-methyl-6-phenyl-1,4-phenylene) ether, poly (2,6-dibenzyl-1,4-phenylene) ether, poly (2-ethoxy) -1,4-phenylene) ether, poly (2-chloro-1,4-phenylene) ether, poly (2,6-dibromo-1,4-phenylene) ether, and the like, particularly from the viewpoint of workability. Poly (2,6-dimethyl-1,4-phenylene) ether is preferred.
These may be used alone or in combination of two or more.

  The weight average molecular weight of the polyphenylene ether resin is preferably 20,000 to 60,000.

  Polyphenylene ether resins can be mixed with one or more other resins. Examples of such resins include polystyrene resins, polyolefin resins typified by polypropylene, engineering plastic resins typified by polyamide, and polyphenylene. Examples thereof include super engineering plastic resins typified by sulfide, and among these, from the viewpoint of improving processability, it is preferable to mix with the above-mentioned polystyrene resin.

In this specification, the polycarbonate-based resin is a resin having a carbonate structure derived from bisphenols and phosgene (or diphenyl carbonate), and has a high glass transition point and heat resistance.
Examples of the polycarbonate resin include 2,2′-bis (4-hydroxyphenyl) propane (bisphenol A), 2,2′-bis (4-hydroxyphenyl) butane (bisphenol B), and 1,1′-bis. (4-hydroxyphenyl) ethane, bis (4-hydroxyphenyl) methane (bisphenol F), 1,1-bis (4-hydroxyphenyl) cyclohexane, 1,1-bis (4-hydroxyphenyl) cyclopentane, 1, Derived from 1-bis (4-hydroxyphenyl) -1-phenylmethane, 1,1-bis (4-hydroxyphenyl) -1-phenylethane, 1,2-bis (4-hydroxyphenyl) ethane, etc. Etc.

  Polycarbonate resins can be mixed with one or more other resins. Examples of such resins include polyethylene resins, polypropylene resins, acrylonitrile-butadiene-styrene copolymers (ABS resins), polystyrene resins. , Polyethylene terephthalate, polybutylene terephthalate, acrylonitrile-styrene copolymer (AS resin), syndiotactic polystyrene, polyphenylene oxide, polyacetal, polymethyl methacrylate, polyphenylene sulfide, polyethersulfone, polyarylate, polyamide, polyimide, polyethylene naphthalate A phthalate etc. are mentioned.

  As the polycarbonate-based resin, polycarbonate (PC) alone or PC / ABS is particularly preferable from the viewpoint of processability.

  It is preferable that content of the thermoplastic resin in the foam for heating toilet seats of this embodiment is 40 mass%-100 mass% with respect to 100 mass% of foam for heating toilet seats.

  In the case of using a polystyrene resin in the heating toilet seat foam of the present embodiment, the content of the polystyrene resin is 30 to 100 parts by weight with respect to 100 parts by weight of the thermoplastic resin from the viewpoint of processability and deflection temperature under load. It is preferable that it is a weight part.

  When the polyphenylene ether resin is used in the heating toilet seat foam of the present embodiment, the content of the polyphenylene ether resin is 10 parts by weight with respect to 100 parts by weight of the thermoplastic resin from the viewpoint of workability and deflection temperature under load. Preferably, the amount is 15 parts by weight or more, more preferably 90 parts by weight or less, and more preferably 85 parts by weight or less.

  When a polycarbonate resin is used in the heating toilet seat foam of the present embodiment, the content of the polyphenylene ether resin is from 80 parts by weight to 100 parts by weight of the thermoplastic resin from the viewpoint of processability and load deflection temperature. The amount is preferably 100 parts by weight.

It is preferable that the foam for heating toilet seats of this embodiment contains a flame retardant from a viewpoint of safety.
Examples of the flame retardant include an organic flame retardant and an inorganic flame retardant. Here, as the organic flame retardant, a halogen compound typified by a bromine compound, a non-phosphorus typified by a phosphorus compound, and a silicone compound are used. Examples of the inorganic flame retardant include metal hydroxides typified by aluminum hydroxide and magnesium hydroxide, antimony trioxide, and antimony compounds typified by antimony pentoxide.
These may be used alone or in combination of two or more.

  Among the above flame retardants, non-halogen compounds, phosphorus compounds, and silicone compounds are preferable from the viewpoint of environmental properties, and phosphorus compounds and silicone compounds are more preferable.

［式中、Ｑ¹〜Ｑ⁸は、それぞれ独立に、水素、ハロゲン、アルキル基、アルコキシ基、フェニル基を示し、ｍは、１以上の整数であり、ｎ１〜ｎ４は、それぞれ独立に１〜５の整数であり、ｎ５及びｎ６は、それぞれ独立に、１〜４の整数である。］ As the phosphorus-based flame retardant, phosphorus or a compound containing a phosphorus compound can be used.
Examples of phosphorus include red phosphorus.
Examples of phosphorus compounds include phosphate esters and phosphazene compound groups having a bond between a phosphorus atom and a nitrogen atom in the main chain. Here, as the phosphate ester, for example, trimethyl phosphate, triethyl phosphate, tripropyl phosphate, tributyl phosphate, tripentyl phosphate, trihexyl phosphate, tricyclohexyl phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, Examples include dildiphenyl phosphate, dicresyl phenyl phosphate, dimethyl ethyl phosphate, methyl dibutyl phosphate, ethyl dipropyl phosphate, hydroxyphenyl diphenyl phosphate, resorcinol bisdiphenyl phosphate, etc., and compounds modified with various substituents, Various condensation-type phosphate ester compounds are also included. Among these, as the phosphate ester, from the viewpoint of heat resistance, flame retardancy, and foamability, triphenyl phosphate and a phosphate ester compound represented by the following general formula (2) are preferable.

[Wherein, Q ^{1 to} Q ⁸ each independently represent hydrogen, halogen, an alkyl group, an alkoxy group, or a phenyl group, m is an integer of 1 or more, and n1 to n4 each independently represents 1 to And n5 and n6 are each independently an integer of 1 to 4. ]

In the foam of the present embodiment, among these, in the general formula (2), Q ^{1 to} Q ⁴ are preferably hydrogen or a methyl group, and Q ⁵ and Q ⁶ are preferably hydrogen. , Q ⁷ and Q ⁸ are preferably methyl groups.
Moreover, the phosphate ester compound represented by the general formula (2) may be a mixture of m-mers.

(Mono or poly) organosiloxane can be used for the flame retardant of the silicone compound.
Examples of (mono or poly) organosiloxanes include monoorganosiloxanes such as dimethylsiloxane and phenylmethylsiloxane, and polydimethylsiloxanes obtained by polymerizing these, polyphenylmethylsiloxane, and copolymers thereof. Examples thereof include siloxane.
In the case of organopolysiloxane, examples of the bonding group of the main chain or branched side chain include, but are not limited to, hydrogen, an alkyl group, and a phenyl group, and a methyl group, an ethyl group, a propyl group, and a phenyl group are preferable. As the terminal linking group, any of a hydroxyl group, an alkoxy group, an alkyl group, and a phenyl group may be used.
There is no restriction | limiting in particular in the shape of silicones, Arbitrary things, such as an oil form, a gum form, a varnish form, a powder form, a pellet form, can be utilized.

  In addition, in the foam for heating toilet seat of this embodiment, instead of or in addition to the above-mentioned flame retardant, conventionally known various flame retardants and flame retardant aids such as melamine, ammelide, ammelin, benzoguanamine, succino Cyclic nitrogen compounds such as compounds having a triazine skeleton such as guanamine, melamine cyanurate, melam, melem, methone, melon and their sulfates; alkali metal hydroxides such as aluminum hydroxide and magnesium hydroxide containing crystal water Alternatively, alkaline earth metal hydroxides; zinc borate compounds; zinc stannate compounds may be used. These may be used alone or in combination of two or more.

  In addition, the foam for heating toilet seats of this embodiment includes other thermoplastic resins, antioxidants, thermal stabilizers, antistatic agents, lubricants, pigments, dyes in addition to the above components in the base resin. Further, a weather resistance improver, an impact modifier, glass beads, inorganic fillers, nucleating agents such as talc, and the like may be added within a range that does not impair the object of the invention.

The expansion ratio of the heating toilet seat foam of the present embodiment is not particularly limited, but is preferably 3 cc / g or more from the viewpoint of easily maintaining rigidity while exhibiting excellent heat insulating properties. g or more, more preferably 5 cc / g or more, particularly preferably 50 cc / g or less, more preferably 45 cc / g or less, and 40 cc / g or less. Is particularly preferred.
The foaming ratio of the foam was determined by measuring the volume (cc) of the foam by a submersion method and dividing the volume by mass (cc / g).

The closed cell ratio of the heating toilet seat foam of the present embodiment is preferably 50% or more, more preferably 60% or more, and particularly preferably 70% or more, from the viewpoint of enhancing heat insulation. Higher is preferable.
The closed cell ratio (%) is calculated by the equation represented by the following equation (3).
S (%) = {(Vx−W / ρ) / (Va−W / ρ)} × 100 (3)
[Where Vx is the true volume of the foam (cm ³ ), Va is the apparent volume of the foam (cm ³ ), W is the weight of the foam (g), ρ Is the density (g / cm ³ ) of the foam base resin. ]

(Method for producing foam for heating toilet seat)
Next, the manufacturing method of the foam for heating toilet seats of this embodiment is demonstrated.

The foaming method of the foam of the present embodiment is not particularly limited, and examples thereof include an extrusion foaming method, a bead foaming method, an injection foaming method, and the like. Among these, the bead foaming method is preferable.
In the case of the extrusion foaming method, the foam is plate-shaped, and in order to process this, a punching process for cutting into a desired shape and a heat bonding process for pasting the cut parts are required. Since a mold having a desired shape is manufactured and filled with foam beads, it is easy to mold into a finer shape or a complicated shape. For example, a rib or hook shape is formed in one foam molded body. Can be combined in a complicated way. In addition, the injection foaming method can process complex shapes, but the bead foaming method makes it easy to adjust the expansion ratio. Furthermore, in the case of the extrusion foaming method and the injection foaming method, the resin is melted and foamed and molded, whereas in the case of the bead foaming method, the beads are filled and molded at room temperature, so molding This is advantageous in that the residual strain in the product is small and deformation and warping with time are unlikely to occur. Thus, the foam containing foam beads is a preferred form.

  In the bead foaming method, the foamed beads may be subjected to multi-stage foaming. Here, the foamed beads may be pressurized with a gas before foaming in each stage, and the foamed beads are molded into a molding die. The cavity may be filled and heated. The temperature condition, pressure condition, time condition and the like in each step in the method may be appropriately determined according to the purpose.

It does not specifically limit as a foaming agent used when manufacturing the foam for heating toilet seats of this embodiment, The gas generally used can be used.
Examples of the gas include air, carbon dioxide gas (for example, carbon dioxide), nitrogen gas, oxygen gas, ammonia gas, hydrogen gas, argon gas, helium gas, neon gas, and other inorganic gases; trichlorofluoromethane (R11), dichlorodifluoro Methane (R12), chlorodifluoromethane (R22), tetrachlorodifluoroethane (R112) dichlorofluoroethane (R141b) chlorodifluoroethane (R142b), difluoroethane (R152a), HFC-245fa, HFC-236ea, HFC-245ca, HFC-225ca Saturated hydrocarbons such as propane, n-butane, i-butane, n-pentane, i-pentane, neopentane; dimethyl ether, diethyl ether, methyl ethyl ether, isopropyl Ethers such as ether, n-butyl ether, diisopropyl ether, furan, furfural, 2-methylfuran, tetrahydrofuran, tetrahydropyran; dimethyl ketone, methyl ethyl ketone, diethyl ketone, methyl n-propyl ketone, methyl n-butyl ketone, methyl i-butyl ketone, Ketones such as methyl n-amyl ketone, methyl n-hexyl ketone, ethyl n-propyl ketone, ethyl n-butyl ketone; methanol, ethanol, propyl alcohol, i-propyl alcohol, butyl alcohol, i-butyl alcohol, t-butyl alcohol, etc. Alcohol: formic acid methyl ester, formic acid ethyl ester, formic acid propyl ester, formic acid butyl ester, formic acid amyl ester, propionic acid methyl ester, propio Carboxylic acid esters such as ethyl ester; methyl chloride, chlorinated hydrocarbons such as ethyl chloride.
These may be used alone or in combination of two or more.

The foaming agent preferably has no flammability and no flame support from the viewpoint of flame retardancy, and more preferably an inorganic gas from the viewpoint of gas safety.
In particular, inorganic gases are less soluble in resins than organic gases such as hydrocarbons, and the gas tends to escape from the resin after the foaming process or molding process, so there is an advantage that the dimensional stability of the molded product over time is further improved. . In addition, the inorganic gas is less susceptible to plasticization of the resin by the residual gas, and has an advantage that excellent heat resistance can be easily expressed from an earlier stage without passing through a process such as aging.
Among inorganic gases, carbon dioxide gas is preferred from the viewpoints of solubility in resins and ease of handling.

  The method of processing the foam obtained by the above-described manufacturing method into a desired shape such as the shape of a heated toilet seat is not particularly limited, but for example, a method of filling a mold with foam beads or molten resin, and molding, Examples include a method of cutting with a blade such as a saw blade or a die cutting blade, a method of cutting with a mill, and the like. It is also possible to adhere a plurality of foams by heat or an adhesive.

(Heating toilet seat)
In FIG. 1, the top view which shows the heating toilet seat of this embodiment containing the foam for heating toilet seats of this embodiment is shown. FIG. 2A shows a cross-sectional view of the foam for a heating toilet seat according to the present embodiment taken along a plane along line I-I shown in FIG. 1, and FIG. Sectional drawing when the heating toilet seat of this embodiment containing the foam for heating toilet seats is cut | disconnected by the surface which follows the line II shown in FIG. In addition, the unit of the numerical value in FIG. 2 is mm.
The heating toilet seat of this embodiment contains the foam for heating toilet seats of this embodiment, and contains a heater and a skin as needed.

  Although the heating toilet seat 10 of this embodiment is not particularly limited, as shown in FIG. 1, a composite is formed by embedding a general heater 2 in the heating toilet seat foam 1 of this embodiment that is appropriately molded, The composite can be manufactured by coating with a general resin skin 3.

  The thickness of the skin 3 and the temperature of the heater 2 are not particularly limited and may be appropriately determined according to the purpose.

  Next, the present invention will be described more specifically based on examples and comparative examples. However, the present invention is not limited to the following examples.

  The analysis methods used in the examples and comparative examples are described below.

(1) Foaming ratio The weight (g) of a 100 mm square sample with a thickness of 3 mm was measured, and the value (cc / g) obtained by dividing the sample volume (cc) measured by the submerging method by the weight (g) was defined as the foaming ratio. .

(2) Deflection temperature under load A test based on the flatwise method of JIS K7191 was performed, and the deflection temperature under load of the foam was measured. The test piece had a width of 13 mm, a thickness of 10 mm, a fulcrum distance of 64 mm, a bending stress applied to the test piece of 0.055 MPa, and the temperature (° C.) at which the deflection reached 0.34 mm was defined as the deflection temperature under load.

  The evaluation methods used in the examples and comparative examples are described below.

(3) Long-term dimensional stability A groove having a width of 61 mm, a length of 400 mm, and a thickness of 30 mm is formed as shown in FIG. 1, and, as shown in FIG. 2, the foam, silicon rubber heater (diameter 2. 5 mm) and a polypropylene toilet skin (thickness 3 mm) were combined to create a simulated toilet seat. Then, a 70 kg weight was placed on the simulated toilet seat, and the degree of deformation of the foam after 9000 hours of continuous operation at a heater temperature of 50 ° C. was visually evaluated. Moreover, the same evaluation was performed when the skin thickness was 2 mm.
◎: No deformation ○: Although it is slightly deformed, no gap is generated between it and the skin ×: There is a gap between the skin

(4) Thermal insulation after long-term use Place a 70 kg weight on the same simulated toilet seat created in (3), operate continuously for 9000 hours at a heater temperature of 50 ° C, and have a seating surface of 20 in a 0 ° C environment. The heater temperature (° C.) at which the temperature was reached was measured. Moreover, the same evaluation was performed when the skin thickness was 2 mm.
◎: No change from before continuous operation ○: Less than + 1 ℃ compared to before continuous operation ×: More than + 1 ℃ compared to before continuous operation

[Example 1]
In a pressure vessel, PSJ-polystyrene 685 (manufactured by PS Japan Co., Ltd.) as a polystyrene resin is accommodated, carbon dioxide (gas) as a blowing agent is injected, and the pressure is 3 MPa and the temperature is 10 ° C. The base resin pellets were impregnated with carbon dioxide over time and then foamed with pressurized steam.
The obtained beads were accommodated in a pressurizing / heating device, air was injected as a pressure source, the pressure was increased to 0.4 MPa over 1 hour, and then maintained at 0.4 MPa for 8 hours, followed by pressure treatment. .
This was filled into a molding die having water vapor holes and molded by heating with pressurized steam.
The physical properties of the obtained foam are as shown in Table 1. When this was used for evaluation, the foam did not deform and maintained excellent heat insulation properties at a thickness of 3 mm. When the skin thickness was 2 mm, the foam was slightly deformed, but the effect on the heat insulation decreased was small, and the heater temperature rise was 1 ° C or less compared to before continuous operation. There was no level.

[Example 2]
When the evaluation was performed in the same manner as in Example 1 except that the expansion ratio was changed as shown in Table 1, the result was the same as the result of Example 1.

[Examples 3 to 5]
Using PSJ-polystyrene 685 (manufactured by PS Japan Co., Ltd.) as the polystyrene resin and S201A (manufactured by Asahi Kasei Chemicals Co., Ltd.) as the polyphenylene ether resin, the base resin mixed while changing the ratio as shown in Table 1 was used. Then, the mixture was heated and melt-kneaded with an extruder and then extruded to prepare a base resin pellet. This was foamed and molded in the same manner as in Example 1.
Table 1 shows the physical properties of the obtained foam. As a result of evaluation using these, the foam did not deform and maintained excellent heat insulation properties in both cases of a skin thickness of 3 mm and 2 mm.

[Examples 6 and 7]
Using FPR3000 (manufactured by Mitsubishi Engineering Plastics) as a polycarbonate resin (PC), foaming and molding were performed in the same manner as in Example 1 (Example 6).
Table 1 shows the physical properties of the obtained foam. When the evaluation was performed using this, the foam did not deform and showed excellent heat insulation properties in both cases of the skin thickness of 3 mm and 2 mm.
Moreover, when MB3800 (manufactured by Mitsubishi Engineering Plastics Co., Ltd.) was used as the polycarbonate-based resin (PC / ABS), it was evaluated in the same manner as in Example 6 and showed excellent heat insulation (Example) 7).

[Comparative Example 1]
Using Suntec M1920 (manufactured by Asahi Kasei Chemicals Corporation) as a polyethylene resin, a foam was prepared and evaluated in the same manner as in Example 1. The foam contracted after continuous operation, and a gap was generated between the foam and the skin. did. As a result, the heat insulating property was lowered, and as a result, it was necessary to raise the heater temperature by 1 ° C. or more as compared to before the continuous operation.

[Comparative Example 2]
Using Polypropylene J227T (manufactured by Prime Polymer Co., Ltd.) as a polypropylene resin, a foam was prepared and evaluated in the same manner as in Example 1. The foam contracted after continuous operation, and there was a gap between it and the skin. Occurred. As a result, the heat insulating property was lowered, and as a result, it was necessary to raise the heater temperature by 1 ° C. or more as compared to before the continuous operation.

[Comparative Example 3]
When PSJ-polystyrene 685 (manufactured by PS Japan Co., Ltd.) was used as the polystyrene resin and the foaming ratio was changed as shown in Table 1, it was evaluated in the same manner as in Example 1, and the foam was found after continuous operation. Shrinkage occurred and a gap was generated between the skin. As a result, the heat insulating property was lowered, and as a result, it was necessary to raise the heater temperature by 1 ° C. or more as compared to before the continuous operation.

  According to the foam for a heated toilet seat and the heated toilet seat of the present invention, the foam can be prevented from being deformed even if it is used for a long time under the condition that a human body weight is applied near the heat source. Generation of a gap between the body and the body can be prevented, whereby excellent heat insulation can be maintained, and power saving can be achieved over a long period of time.

DESCRIPTION OF SYMBOLS 1 Foam for heating toilet seat 2 Heater 3 Skin 10 Heating toilet seat

Claims (5)

  A foam for heating toilet seats, wherein a deflection temperature under load (HDT) measured at a thickness of 10 mm in accordance with JIS K7191 is 60 ° C or higher.   The foam for heating toilet seats according to claim 1, comprising a thermoplastic resin.   The foam for heating toilet seats according to claim 1 or 2, wherein the thermoplastic resin includes a polyphenylene ether resin.   The foam for heating toilet seats according to claim 1 or 2, wherein the thermoplastic resin includes a polycarbonate-based resin.   The heating toilet seat characterized by including the foam for heating toilet seats as described in any one of Claims 1-4.

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