JP2001271402A - Heat exchange tank for warm water washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchange tank for warm water washing device made of nylon resin having excellent and balanced original characteristics of nylon resin such as molding property, thermal resistance property, toughness, and characteristic against creep and being suitable for vibration welding. SOLUTION: The purpose can be achieved in such a manner that glass fiber reinforced nylon resin contains a specific plasticizer for polyamide and a copper compound and length distribution of the contained glass fiber is controlled to a specific scope. An upper tank 3 and a lower tank 4 made of glass fiber having an average fiber size of 5 to 15 μm of 10 to 150 pts.wt., to nylon resin of 100 pts.wt., are integrated by welding to produce a heat exchange tank. Furthermore, the nylon resin favorably contain plasticizer of 1 to 50 pts.wt., and a copper compound of 0.01 pts,wt., or more. Preferably, average fiber length per weight of glass fiber in the component is in a scope of 100 to 400 μm, and a ratio of glass fiber having fiber length of 60 μm or less occupies 10 to 50 wt.% of total glass fiber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange tank for a hot water washing apparatus, which is excellent in heat resistance, surface appearance of a moldable product, dimensional stability, and vibration welding property, and more particularly, to an upper part after melt molding. The present invention relates to a heat exchange tank for a hot water washing device, which is made of a nylon resin composition obtained by vibration welding a tank and a lower tank.

[0002]

2. Description of the Related Art Nylon resin is used as a heat exchange tank in a hot water washing apparatus because of its excellent injection moldability, heat resistance, toughness, and creep resistance.

[0003]

However, in a conventional heat exchange tank using glass fiber reinforced nylon resin, the upper tank and the lower tank are welded by a vibration welding method or the like, but the strength of the welded portion is low. If insufficient, it may burst due to aging. Therefore, in order to maintain the strength of the welded portion, it was necessary to control the welding allowance within a specific range. For this reason, the upper tank and the lower tank must be manufactured very precisely, and the yield has been significantly reduced. The present invention aims to improve the vibration welding property, which was a problem in the conventional nylon resin described above, and furthermore, has excellent balance with the inherent properties of the nylon resin such as moldability, heat resistance, toughness, and creep resistance. Another object of the present invention is to provide a heat exchange tank for a hot water washing device made of nylon resin, which is also suitable for vibration welding.

[0004]

The inventors of the present invention have studied to solve the above-mentioned problems, and as a result, as necessary, in a glass fiber reinforced nylon resin, the length distribution of glass fibers contained therein has been specified. It has been found that the object can be achieved by controlling the range, and the present invention has been achieved. That is, the present invention relates to (1) (A) 100 parts by weight of nylon resin,
(B) Glass fibers 10 to 15 having an average fiber diameter of 5 to 15 μm
A heat exchange tank for a hot water washing device, wherein an upper tank and a lower tank each comprising 0 parts by weight are integrated by welding. (2) The heat exchange tank for a hot water washing apparatus according to the above (1), further comprising (C) 1 to 50 parts by weight of a plasticizer. (3) The heat exchange tank for a hot water washing apparatus according to the above (2), further comprising (D) at least 0.01 part by weight of a copper compound. (4) (D) the amount of copper compound added is (A) nylon resin 1
The heat exchange tank for a hot water washing device according to (3), wherein the amount is 0.01 to 3 parts by weight with respect to 00 parts by weight. (5) The weight average fiber length of the glass fibers in the composition is 100
The ratio of glass fibers having a fiber length of 60 μm or less is within a range of from 400 μm to
The heat exchange tank for a hot water washing device according to any one of the above (1) to (4), wherein (6) The heat exchange tank according to any one of (1) to (5), wherein the nylon resin is at least one selected from aliphatic nylon resins having a melting point of 200 ° C. or higher. (7) The hot water washing apparatus according to any one of (1) to (6), wherein the nylon resin is at least one selected from nylon 66, nylon 6, and copolymerized nylon containing these as a main component. Heat exchange tank. (8) Copolymer nylon is composed of nylon 6 and nylon 66
The heat exchange tank for a hot water washing device according to the above (7), which is a copolymer comprising components. (9) The heat exchange tank according to (8), wherein the copolymerized nylon is a copolymer composed of 98 to 80% by weight of nylon 6 component and 2 to 20% by weight of nylon 66 component. (10) Copolymer nylon is nylon 66 component 98-80
(8) The heat exchange tank for a hot water washing apparatus according to the above (8), which is a copolymer composed of 2% by weight and 2 to 20% by weight of a nylon 6 component. (11) The above (1) to (1), wherein the copper compound is a monovalent copper compound.
(10) The heat exchange tank for a hot water washing device according to any of (10). (12) The heat exchange tank according to (11), wherein the monovalent copper compound is cuprous halide. (13) An object of the present invention is to provide the heat exchange tank for a hot water washing apparatus according to any one of (1) to (12), wherein the upper tank and the lower tank are integrated by vibration welding.

[0005]

Embodiments of the present invention will be described below. In the present invention, “weight” means “mass”. The nylon resin (A) used in the present invention is a nylon containing amino acids, lactams or diamines and dicarboxylic acids as main components. Representative examples of the main components include amino acids such as 6-aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, and paraaminomethylbenzoic acid, lactams such as ε-aminocaprolactam and ω-laurolactam, and tetramethylene. Diamine, hexamerenediamine, 2-methylpentamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4- / 2,4,4-trimethylhexamethylenediamine, 5-methylnonamethylenediamine, metaxylenediamine , Para-xylylenediamine, 1,3-bis (aminomethyl) cyclohexane,
1,4-bis (aminomethyl) cyclohexane, 1-amino-3-aminomethyl-3,5,5-trimethylcyclohexane, bis (4-aminocyclohexyl) methane, bis (3-methyl-4-aminocyclohexyl) methane , 2,2-bis (4-aminocyclohexyl) propane, bis (aminopropyl) piperazine, aminoethylpiperazine, and other aliphatic, alicyclic, and aromatic diamines, and adipic acid, speric acid, azelaic acid, and sebacic acid , Dodecane diacid, terephthalic acid, isophthalic acid, 2-chloroterephthalic acid, 2-methylterephthalic acid, 5-methylisophthalic acid, 5-sodium sulfoisophthalic acid, hexahydroterephthalic acid, aliphatics such as hexahydroisophthalic acid, Alicyclic and aromatic dicarboxylic acids are exemplified by the present invention. Information, it is possible to use nylon homopolymers or copolymers derived from these raw materials each alone or in the form of mixtures.

In the present invention, particularly useful nylon resins are nylon resins having a melting point of 200 ° C. or more and excellent in heat resistance and strength. Specific examples include polycaproamide (nylon 6) and polyhexamethylene. Adipamide (nylon 66), polytetramethylene adipamide (nylon 46), polyhexamethylene sebacamide (nylon 610), polyhexamethylene dodecamide (nylon 612), polyhexamethylene adipamide / polyhexamethylene Terephthalamide copolymer (nylon 66 /
6T), polyhexamethylene adipamide / polyhexamethylene isophthalamide copolymer (nylon 66/6
I), polyhexamethylene adipamide / polyhexamethylene terephthalamide / polyhexamethylene isophthalamide copolymer (nylon 66 / 6T / 6I), polyxylylene adipamide (nylon XD6) and mixtures or copolymers thereof Is mentioned.

More preferred are nylon 6, nylon 66, nylon 610, nylon 6/66.
Examples thereof include copolymers and nylon 6/12 copolymers, and particularly preferred are nylon 6, nylon 66 and copolymerized polyamides containing these as main components, for example, nylon 6/66 copolyamide. Those comprising 98 to 80% by weight of the component and 2 to 20% by weight of the other component can be mentioned. Further, it is practically suitable to use these nylon resins as a mixture depending on required properties such as moldability, heat resistance, and vibration welding property.

The degree of polymerization of these nylon resins is not particularly limited, and the relative viscosity measured at 25 ° C. in a 1% concentrated sulfuric acid solution is in the range of 1.5 to 5.0, especially 2.0 to 4.0. Those in the range of 0 are preferred.

The plasticizer (C) used in the present invention is not particularly limited as long as it is a plasticizer effective for a nylon resin. The compound represented by the following formula (I), a polyhydric alcohol or a polyalkylene glycol and derivatives thereof Can be preferably exemplified.

[0010]

Embedded image

(Wherein R1 to R6 are

Embedded image A sulfonamide group, -OH group, -COOR9
An ester group represented by the formula, hydrogen, a halogen group, and having 1 to 1 carbon atoms
A group selected from 20 alkyl groups, alkenyl groups, aralkyl groups, and aromatic groups. Here, R7 and R8 represent hydrogen or a group selected from an alkyl group having 1 to 20 carbon atoms, an alkenyl group, an aralkyl group, and an aromatic group. R9 represents a group selected from an alkyl group having 1 to 20 carbon atoms, an alkenyl group, an aralkyl group, and an aromatic group. However, R1 to R6
At least one of the above is a sulfonamide group, -OH
Or a group selected from the above ester groups. )

Specific examples of the compound of the above formula (I) include:
Aromatic sulfonamides such as N-butylbenzenesulfonamide, N-ethylbenzenesulfonamide, N-ethyl-o, p-toluenesulfonamide, N, N'-dibutylbenzenesulfonamide and N-propylbenzenesulfonamide; And hydroxybenzoic acid esters such as hydroxybenzoic acid-n-octyl ester and p-hydroxybenzoic acid-2-ethylhexyl ester.

The polyhydric alcohol is a compound having two or more hydroxyl groups in a molecule, and specific examples thereof include ethylene glycol, glycerin, 2-methyl-
2,4-pentanediol, 2,2,4-trimethyl-
1,3-pentanediol and the like.

Further, polyalkylene glycol and derivatives thereof are polyalkylene glycol having a molecular weight of 200 to 6000 and the terminal portion of the polyalkylene glycol is modified into a structure of carboxylic acid, carboxylic acid ester, ether, amine, epoxy or the like. Specifically, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, polyethylene glycol / propylene glycol copolymer, and one or both terminals of these polyalkylene glycols are carboxylic acid, carboxylic acid ester, ether, It is modified to a structure such as amine or epoxy.

Specific examples of the modified polyalkylene glycol include polyethylene glycol benzoate, polyethylene glycol fatty acid ester, terminal carboxylated polyethylene glycol and its alkyl ester, terminal aminated polyethylene glycol, terminal epoxidized polyethylene glycol, and polyethylene glycol alkyl. Ether, polypropylene glycol benzoate, polypropylene glycol fatty acid ester, terminal carboxylated polypropylene glycol and its alkyl ester, terminal aminated polypropylene glycol, terminal epoxidized polypropylene glycol,
Polypropylene glycol alkyl ether, polytetramethylene glycol benzoate, polytetramethylene glycol fatty acid ester, terminal carboxylated polytetramethylene glycol and its alkyl ester, terminal aminated polytetramethylene glycol, terminal epoxidized polytetramethylene glycol, polytetra Examples include methylene glycol alkyl ether.

Among these plasticizers, N-butylbenzenesulfonamide, N-ethylbenzenesulfonamide,
N-ethyl-o, p-toluenesulfonamide, N,
Aromatic sulfonamides such as N′-dibutylbenzenesulfonamide, N-propylbenzenesulfonamide,
Polyethylene glycol derivatives such as polyethylene glycol benzoate, polyethylene glycol fatty acid ester, terminally carboxylated polyethylene glycol and its alkyl ester, polypropylene glycol such as polypropylene glycol benzoate, polypropylene glycol fatty acid ester, terminally carboxylated polypropylene glycol and its alkyl ester Particularly preferred are derivatives, polytetramethylene glycol benzoates, polytetramethylene glycol fatty acid esters, polytetramethylene glycol derivatives such as terminally carboxylated polytetramethylene glycol and alkyl esters thereof.

The amount of the plasticizer (C) is from 100 to 100 parts by weight of the nylon resin (A).
A range of parts by weight is selected, and a range of 2 to 30 parts by weight is particularly preferable. When the amount of the plasticizer is less than 1 part by weight, the obtained resin composition has insufficient vibration welding property, and when the amount exceeds 50 parts by weight, adverse effects such as volatilization during melt molding and a decrease in heat resistance become apparent. Not preferred.

In the present invention, the glass fiber used as the component (B) has a weight-average fiber length of 100 to 400 μm after melt-kneading with a nylon resin and a polyamide elastomer, particularly after being melt-kneaded once. ,
In addition, it is preferable that the ratio of the glass fiber having a fiber length of 60 μm or less is controlled to be in a range of 10 to 50% by weight in all the glass fibers. This is because high welding strength can be obtained when the upper tank and the lower tank are welded by vibration. Although the reason for this is not necessarily clear, it is considered that one of the causes is to affect the orientation behavior of glass fibers in the matrix resin layer melted by frictional heat due to vibration.

The preferred weight average fiber length of the glass fiber and the proportion of the glass fiber of 60 μm or less are 120 to 30 respectively.
0 μm and in the range of 15-40% by weight. If the weight average fiber length of the glass fiber is shorter than the above range, the strength of the resin composition is lowered, which is not preferable. On the other hand, if the proportion of the glass fiber having a size of 60 μm or less is less than the above range, the vibration welding property is lowered, which is not preferable. On the contrary, if the proportion is more than the above range, the mechanical strength is adversely affected.

It is preferable in terms of production efficiency to obtain a glass fiber reinforced nylon resin composition having such a fiber length distribution in one melt-kneading step, and as an example of an efficient method for realizing this, a strand length of 1 mm or more is used. A method in which glass fibers and glass fibers having a fiber length of 20 to 500 μm are used as raw materials as a mixture in an appropriate ratio can be mentioned.
When two or more types of glass fibers having different strand lengths are used in combination, it is also a preferable method to use glass fibers having different average diameters of 2 μm or more.
The total glass fiber content in the resin composition of the present invention is in the range of 10 to 150 parts by weight, more preferably 20 to 80 parts by weight, based on 100 parts by weight of the nylon resin.

Specific examples of the copper compound (D) used in the present invention include cuprous chloride, cupric chloride, cuprous bromide, cupric bromide and cuprous iodide. Cupric iodide, cupric sulfate, cupric nitrate, copper phosphate, cuprous acetate, cupric acetate, cupric salicylate, cupric stearate, cupric benzoate and the inorganic Complex compounds of copper halide with xylylenediamine, 2-mercaptobenzimidazole, benzimidazole and the like can be mentioned. Of these, monovalent copper compounds, particularly monovalent copper halide compounds, are preferred, and cuprous acetate, cuprous iodide and the like can be exemplified as particularly suitable copper compounds.

The amount of the copper compound added is 100
0.01 parts by weight or more based on parts by weight, preferably 0.0 parts by weight
The amount is 15 parts by weight or more, which is sufficient to improve the strength retention of the welded portion when the upper and lower tanks of the resin composition to be produced are annealed after being welded by the vibration welding method. If the addition amount of the copper compound is too small, it is inappropriate because the retention of the strength of the welded portion at the time of annealing after the welding is insufficient. The upper limit of the amount of the copper compound added is 3 parts by weight,
The amount is preferably 2 parts by weight, and if it is too much, metal copper is easily released at the time of melt molding, and the value of the product is reduced by coloring, which is not preferable.

In the present invention, it is possible to add an alkali halide in a form used in combination with a copper compound. Examples of the alkali halide compound include lithium chloride, lithium bromide, lithium iodide, potassium chloride, potassium bromide, potassium iodide, sodium bromide and sodium iodide, and potassium iodide, iodine Sodium chloride is particularly preferred.

In the present invention, it is also possible to add a fibrous / non-fibrous inorganic reinforcing material in addition to the above-mentioned specific glass fibers. Specific examples of such reinforcing agents include carbon fiber, potassium whisker, titanate, and the like. Zinc oxide whisker, aluminum borate whisker, aramid fiber, alumina fiber, silicon carbide fiber, ceramic fiber, asbestos fiber, stone fiber,
Fibrous fillers such as metal fibers, walasteinite, zeolite, sericite, kaolin, mica, clay, pyrophyllite, bentonite, asbestos, talc, silicates such as alumina silicate, alumina, silicon oxide, magnesium oxide, zirconium oxide Metal compounds such as titanium oxide and iron oxide; carbonates such as calcium carbonate, magnesium carbonate and dolomite; sulfates such as calcium sulfate and barium sulfate; hydroxides such as magnesium hydroxide, calcium hydroxide and aluminum hydroxide; Examples include non-fibrous fillers such as glass beads, ceramic beads, boron nitride, silicon carbide, and silica. These may be hollow, and two or more of these fillers may be used in combination. Further, it is more excellent to pre-treat and use these fibrous / non-fibrous fillers with coupling agents such as isocyanate compounds, organic silane compounds, organic titanate compounds, organic borane compounds and epoxy compounds. It is preferable from the viewpoint of obtaining high mechanical strength.

The addition of the alkoxysilane having at least one functional group selected from the group consisting of an epoxy group, an amino group, an isocyanate group, a hydroxyl group, a mercapto group and a ureide group to the nylon resin composition of the present invention is performed mechanically. Strength,
It is effective in improving toughness and the like. Specific examples of such compounds include γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane,
epoxy group-containing alkoxysilane compounds such as β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ
-Mercapto group-containing alkoxysilane compounds such as mercaptopropyltriethoxysilane; ureide group-containing such as γ-ureidopropyltriethoxysilane, γ-ureidopropyltrimethoxysilane, γ- (2-ureidoethyl) aminopropyltrimethoxysilane Alkoxysilane compound, γ-isocyanatopropyltriethoxysilane, γ-isocyanatopropyltrimethoxysilane, γ-isocyanatopropylmethyldimethoxysilane, γ-isocyanatopropylmethyldiethoxysilane, γ-isocyanatopropylethyldimethoxysilane, isocyanato group-containing alkoxysilane compounds such as γ-isocyanatopropylethyldiethoxysilane and γ-isocyanatopropyltrichlorosilane;
Amino-containing alkoxysilane compounds such as -aminoethyl) aminopropylmethyldimethoxysilane, γ- (2-aminoethyl) aminopropyltrimethoxysilane, γ-aminopropyltrimethoxysilane, γ-hydroxypropyltrimethoxysilane, γ- Examples include a hydroxyl group-containing alkoxysilane compound such as hydroxypropyltriethoxysilane.

Further, the nylon resin composition of the present invention includes a crystal nucleating agent such as talc, kaolin, an organic phosphorus compound, polyetheretherketone, a coloring inhibitor such as hypophosphite, a hindered phenol, a hindered amine and the like. Additives such as antioxidants, heat stabilizers, lubricants, UV inhibitors, colorants, etc. can be added.

The method for preparing the nylon resin composition of the present invention is not limited to a specific method. As a specific and efficient example, a mixture of the raw material nylon resin and glass fiber is prepared by using a single-screw or twin-screw extruder, Banbury. It is supplied to a known melt kneader such as a mixer, a kneader, and a mixing roll, and is supplied to a melting point of 220 to 33 depending on the melting point of the nylon resin used.
A method of melting and kneading at a temperature of 0 ° C. can be used. In this melt-kneading, in order to realize a preferable glass fiber length distribution, for example, when melt-kneading with a twin screw extruder, a part of the glass fibers is supplied from a resin raw material feeder together with a nylon resin, and the remaining glass fibers are extruded. Examples include a method of controlling the shearing history of glass fibers supplied from a side feeder at the tip of the machine and a method of using glass fibers having different fiber lengths as raw materials. In the present invention, the addition of a copper compound that is effective in maintaining the welding strength during the annealing treatment after the welding may be performed in any of the above-described melt-kneading processes.

The heat exchange tank composed of the nylon resin composition of the present invention thus obtained is excellent in heat resistance, product surface appearance, dimensional stability, and vibration welding property, and is excellent. It is particularly useful when the upper and lower tanks obtained by injection molding, extrusion molding, or blow molding are welded by a vibration welding method or the like.

[0029]

FIG. 1 shows a sanitary washing apparatus 1 using a heat exchange tank 2 according to the present invention. The sanitary washing device 1 is used by being installed above a toilet disposed in a toilet space. The sanitary washing device 1 is supplied with tap water to produce hot water, and has a built-in heat exchange tank 2 for storing and holding the hot water. The hot water is used to wash the human body through a washing nozzle (not shown).

FIGS. 2 and 3 are external perspective views showing the basic structure of the heat exchange tank 2. FIG. The heat exchange tank 2 is composed of an upper tank 3 and a lower tank 4. The heat exchange tank 2 has a heater 6 for heating water in the tank, a float switch 7 for detecting the presence or absence of water in the tank, and a water switch in the tank. Water inlet 8 for supplying water, nozzle for cleaning water in tank (not shown)
, A thermistor 10 for detecting the temperature of the hot water in the tank (in FIGS. 2 and 3, the position is shifted and actually arranged at the position shown in FIG. 4), Bimetal switch 1 for detecting abnormal temperature of hot water
1. Thermal fuse 12 for preventing ignition by empty cooking
Is provided.

FIG. 4 shows six views of the upper tank 2 (rear view is omitted), and FIG. 5 shows a perspective view. The upper tank 3 has an opening 3a for mounting the float switch 7 and an opening 3 for mounting the water inlet.
b, opening 3c for attaching a tapping part, opening 3 for attaching a thermistor
d, bimetal mounting opening 3e, welding flange 3f
(Joint surface) is provided, and an attachment portion 3h for attachment to the hot water cleaning device is integrally formed on the welding flange 3f (omitted in FIGS. 4 and 5). On the outer surface, reinforcing ribs 2g are formed in a lattice shape. Fig. 6 shows the lower tank 4
FIG. 7 shows a front view (rear view omitted) and FIG. 7 shows a perspective view. The lower tank 4 is provided with a heater insertion opening 4a, a temperature fuse mounting portion 4b, and a welding flange 4c (joining surface), and a welding rib 4d is protruded from the welding flange 4c. FIG. 8 is an enlarged cross-sectional view in a state where the welding flange 3f of the upper tank 3 and the welding flange 4c of the lower tank 4 are joined.

Examples of the resin used in the heat exchange tank 2 will be described below, and the present invention will be described more specifically. However, the present invention is not limited to these examples. In addition, the blending ratios shown in Examples and Comparative Examples are all parts by weight. In the following examples, evaluation of material strength, fluidity, and vibration welding strength was performed by the following method.

[Fiber Length Distribution] Approximately 1 g of the resin composition is burned in an electric furnace to remove the resin component, and the obtained glass fibers are photographed with a micrograph, and the length of each glass single fiber is measured. Asked by that. [Material strength] Measured according to the following standard method. Tensile strength: ASTM D638 Flexural modulus: ASTM D790 [Fluidity] Using a spiral flow measurement mold having a spiral shape with a width of 10 mm, a thickness of 2 mm and a total length of 600 mm,
Injection molding temperature 250 ° C (280 ° C for nylon 66)
When the material was injection-molded under the conditions of an injection molding pressure of 30 kgf / cm ² and a mold temperature of 80 ° C., the distance flowing in the mold was measured and used as an index of fluidity. The longer the flow length, the better the fluidity. [Measurement of Vibration Welding Strength] The shapes of the test pieces used for evaluating the welding strength are as shown in FIGS. A welding rib 4d having a width of 5 mm and a height of 2.5 mm is provided on the welding surface of the test piece shown in FIG.
Are melted and joined. A test piece having the shape shown in FIGS. 2 to 8 was molded and welded using a Branson 2850 type vibration welding apparatus under the following conditions. Vibration frequency: 240 Hz Pressure: 600 kgf Amplitude: 5 mm Welding margin: 1.5 mm The shape of the heat exchange tank obtained by welding is shown in FIGS. The obtained heat exchange tank 2 was filled with water, an internal pressure was applied to the heat exchange tank 2 in the water tank, and the pressure at the time of rupture was defined as the welding strength. Further, the welded test pieces were treated at 150 ° C. for 10 hours in a heating oven, the weld strength was measured, and the strength retention was calculated.

(Examples 1 to 12, Comparative Examples 1 to 3) Nylon resin, plasticizer, glass fiber and copper compound were mixed as shown in the table, and the mixture was subjected to cylinder molding using a TEX30 twin screw extruder manufactured by Japan Steel Works. Melt kneading was performed at a temperature of 250 to 280 ° C and a screw rotation speed of 150 rpm. After drying the obtained pellets, various test pieces were prepared by injection molding (mold temperature: 80 ° C.). Fluidity of each sample, material strength,
The results of measuring the welding strength and the like were as shown in Tables 1 and 2. The type of nylon resin in the table is N
Nylon 6 having a relative viscosity of 2.70, N6 / 66 was a nylon 6/66 copolymer having a melting point of 217 ° C. and a relative viscosity of 2.65, and N66 was nylon 66 and N61 having a relative viscosity of 2.90.
0 represents nylon 610 having a relative viscosity of 2.70. Also,
PEG is polyethylene glycol bisbenzoic acid ester (polyethylene glycol part having a molecular weight of 600), BBSA is N-butylbenzenesulfonamide, and PPG is polypropylene glycol bisbenzoic acid ester (polypropylene glycol part having a molecular weight of 10).
00), PTMG represents polytetramethylene glycol bisbenzoate (molecular weight of the polytetramethylene glycol portion: 600), and POBO represents octyl p-oxybenzoate. The type of the copper compound is as follows.
Copper and KI represent potassium iodide, and the CuI complex represents a 1/1 complex of cuprous iodide / 2-mercaptobenzimidazole.

[0035]

[Table 1]

[0036]

[Table 2]

From Examples 1 to 4 and Comparative Examples 1 to 3, the compositions of the present invention are excellent in the balance between fluidity and material strength, have high welding strength, and particularly have a practical value of excellent weld strength after annealing. It is expensive. Further, from Examples 5 to 7 and Comparative Example 4, the compositions of the present invention in which glass fibers having a strand length of 1.5 mm and a strand length of 0.2 mm were used in combination had fluidity,
It has excellent welding strength, and particularly has excellent weld strength and high practical value. From Examples 8 to 12, the composition of the present invention is:
Excellent balance of fluidity and material strength, high welding strength,
In particular, the strength of the welded portion after annealing is excellent and of high practical value. In addition to the vibration welding, a similar effect can be obtained in hot plate welding.

[0038]

As described above, the heat exchange tank made of nylon resin of the present invention has heat resistance, fluidity, dimensional stability,
It has excellent weldability and is particularly useful when the upper and lower tanks obtained by injection molding, extrusion molding, or blow molding are welded by a vibration welding method or the like.

[Brief description of the drawings]

FIG. 1 is a side view of a sanitary washing device using a heat exchange tank of the present invention.

FIG. 2 is an external perspective view showing a basic configuration of a heat exchange tank of the present invention.

FIG. 3 is an external perspective view showing the basic configuration of the heat exchange tank of the present invention.

FIG. 4 is a view from above of the upper tank (rear view omitted).

FIG. 5 is a perspective view of an upper tank.

FIG. 6 is a six-sided view of the lower tank (rear view omitted).

FIG. 7 is a perspective view of a lower tank.

FIG. 8 is an enlarged cross-sectional view in a state where the welding flange of the upper tank and the welding flange of the lower tank are joined.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sanitary washing apparatus 2 ... Heat exchange tank 2g ... Rib 3 ... Upper tank 3a ... Float switch mounting opening 3b ... Water inlet mounting opening 3c ... Hot water outlet mounting opening 3d ... Thermistor mounting opening 3e ... Bimetal mounting opening 3f ... welding flange (joining surface) 3h ... mounting part 4 ... lower tank 4a ... heater insertion opening 4b ... temperature fuse mounting part 4c ... welding flange (joining surface) 4d ... welding rib 6 ... heater 7 ... float switch 8 ... Water inlet 9 ... Hot water outlet 10 ... Thermistor 11 ... Bimetal switch 12 ... Thermal fuse

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08K 7/14 C08K 7/14 C08L 77/00 C08L 77/00 77/02 77/02 77/06 77 / 06 // (C08L 77/02 (C08L 77/02 77:06) 77:06) (C08L 77/06 (C08L 77/06 77:02) 77:02) B29K 77:00 B29K 77:00 309: 08 309: 08 B29L 22:00 B29L 22:00 F term (reference) 2D038 JB01 4F072 AA02 AA03 AA08 AA09 AB09 AB15 AD44 AE10 AE11 AF02 AF17 AK04 AK15 AL07 4F211 AA29 AB07 AB11 AB16 AB25 AD04 AG07 AH07 TA01 TC07 TD CL01W CL01X CL011 CL03W CL03X CL031 CL05W CL05X CL051 DD078 DF038 DG058 DH048 DL006 EG048 EG078 EH037 EH067 EH157 EV287 EZ008 FA046 FD016 FD023 FD027 GG01

Claims (13)

[Claims] An upper tank having an opening, and a lower tank having an opening all around the opening and joined to the upper tank, wherein the upper tank opening and the lower tank opening are welded to each other. In the heat exchange tank for the hot water washing apparatus to be formed, the upper tank and the lower tank are (A) 100 parts by weight of the nylon resin and (B) the average fiber diameter is 5 to 15
A heat exchange tank for a hot water washing device, wherein the heat exchange tank is formed of a resin composition containing 10 to 150 parts by weight of glass fiber having a diameter of 10 μm. 2. The heat exchange tank for a hot water washing device according to claim 1, wherein the upper tank and the lower tank are formed of a resin composition further containing (C) 1 to 50 parts by weight of a plasticizer. Heat exchange tank for hot water cleaning equipment. 3. The heat exchange tank according to claim 2, wherein the upper tank and the lower tank are formed of a resin composition further containing (D) 0.01 part by weight or more of a copper compound. Heat exchange tank for hot water washing equipment. 4. The heat exchange tank according to claim 3, wherein the amount of the copper compound (D) is 0.01 to 3 parts by weight based on 100 parts by weight of the nylon resin (A). 5. The glass fiber in the composition has a weight average fiber length in the range of 100 to 400 μm and a fiber length of 60.
The ratio of the glass fiber of μm or less is 10 to 5 of the total glass fiber.
The heat exchange tank for a hot water washing device according to any one of claims 1 to 4, wherein the heat exchange tank occupies 0% by weight. 6. The heat exchange tank for a hot water washing device according to claim 1, wherein the nylon resin is at least one selected from aliphatic nylon resins having a melting point of 200 ° C. or higher. 7. The hot water washing apparatus according to claim 1, wherein the nylon resin is at least one selected from nylon 66, nylon 6, and a copolymer polyamide containing these as a main component. For heat exchange tank. 8. The heat exchange tank for a hot water washing apparatus according to claim 7, wherein the copolymerized polyamide is a copolymer composed of a nylon 6 component and a nylon 66 component. 9. The heat exchange tank for a hot water washing apparatus according to claim 8, wherein the copolymerized polyamide is a copolymer comprising 98 to 80% by weight of nylon 6 component and 2 to 20% by weight of nylon 66 component. 10. The copolymer polyamide is nylon 66.
The hot water washing heat exchange tank according to claim 8, which is a copolymer comprising 98 to 80% by weight of the component and 2 to 20% by weight of the nylon 6 component. 11. The heat exchange tank for a hot water washing apparatus according to claim 1, wherein the copper compound is a monovalent copper compound. 12. The heat exchange tank according to claim 11, wherein the monovalent copper compound is cuprous halide. 13. The heat exchange tank for a hot water washing apparatus according to claim 1, wherein the upper tank and the lower tank are integrated by vibration welding.