JP4633532B2 - Airtight switch parts - Google Patents

Description

  The present invention relates to an airtight switch component having excellent durability, particularly in the automotive field where heat resistance and chemical resistance are required.

Conventionally, switch parts having metal terminal inserts include inorganic fillers such as polyamide 66, polyamide 6 or polybutylene terephthalate, glass fiber (hereinafter sometimes abbreviated as GF), talc, kaolin clay, mica, calcium carbonate, etc. Are used alone or in combination. However, polyamide 66 or polyamide 6 alone has not reached fluidity in the molding of a thin part having a metal insert, and there is a problem that mold transfer failure and sink marks frequently occur and wear on the sliding part increases. there were. There was also a problem with calcium chloride resistance in the environment outside the vehicle.
In order to solve this problem, a proposal has been made to use a semi-aromatic polyamide blended with polyamide 6I and / or polyamide 6T (see, for example, Patent Document 1). This eliminates mold transfer defects and sink marks, but improves the wear resistance of the sliding part. However, in order to satisfy the dimensional accuracy, kaolin clay, calcium carbonate, etc., formulated in combination with GF Mineral fillers are inferior in mechanical properties compared to glass fillers, and in particular, in terms of weldability, the strength of the welded portion tends to vary.

When it comes into contact with calcium chloride in a high temperature and high humidity environment, cracks may occur from the vicinity of the welded portion, and eventually defects such as poor insulation may occur. Further, the welding strength is more conspicuous in the case of laser welding, and the plate-like mineral filler has a large shielding property against laser light, so that there is a quantitative limitation on its use as a transmission material. For this reason, two different materials had to be used on the laser absorption side and transmission side.
In this invention, it corresponds to the case where the molded product 1 in which the metal terminal is insert-molded and the molded product 2 that hermetically protects the metal terminal are welded. On the other hand, with regard to laser welding, a proposal for blending a thermoplastic resin composition with a filler that transmits laser light (see, for example, Patent Document 2) and a combination of a fibrous glass filler that transmits laser light and a non-fibrous glass filler. Although the material which was excellent in the low curvature property by the type | system | group is also proposed (for example, refer patent document 3), all had the subject regarding the surface of shaping | molding fluidity | liquidity and a sliding characteristic regarding this use.
Japanese Patent No. 3309347 JP 2004-250621 A JP 2004-315776 A

  The present invention achieves durability by using a thermoplastic resin composition having excellent weldability without impairing thin moldability, low warpage, surface smoothness, chemical resistance, electrical properties, and abrasion resistance. An object is to provide an excellent airtight switch component.

As a result of intensive studies, the inventors have mixed a thermoplastic resin having a certain range of melting point and crystallization temperature and a glass filler composed of two different shapes blended in a specific ratio, The present inventors have found that the above problem can be solved without impairing the conventional characteristics, and have reached the present invention.
That is, the present invention
1. A molded article in which a molded article 1 made of a resin composition in which a metal terminal is insert-molded and a molded article 2 made of a resin composition that hermetically protects the metal terminal portion are welded together to form a thermoplastic resin ( A) Mixing ratio of the fibrous glass filler (B) having an average fiber diameter of 0.1 to 50 μm and the non-fibrous glass filler (C) having an average particle diameter of 0.1 to 1000 μm with respect to 100 parts by weight (B) / A switch component comprising (C) a resin composition containing 10 to 200 parts by weight of a mixture of 0.1 to 10,
However, the resin composition (A) has a melting point (Tm) of 170 to 260 ° C. and a crystallization temperature (Tc) of 220 ° C. or less and satisfies the following formula.
Tm (melting point) ≧ Tc (crystallization temperature) + 20 ° C.
2. 2. The switch component according to the above 1, wherein the thermoplastic resin (A) is a copolymer and / or a mixture of at least one aliphatic polyamide and at least one aromatic polyamide,
3. 2. The switch component according to 1 above, wherein the thermoplastic resin (A) is a polyester resin,
4). The switch component according to any one of 1 or 2 above, wherein the aliphatic polyamide described in 2 is selected from polyamide 66, polyamide 6, polyamide 610, and polyamide 612,
5. The switch component according to any one of 1 or 2 above, wherein the aromatic polyamide described in 2 is selected from polyamide 6T, polyamide 6I, and polyamide MXD6,
6). 3. The polyester resin as described in 3 above is one or more selected from polybutylene terephthalate, polyethylene terephthalate, a copolymer of polybutylene terephthalate, and a copolymer of polyethylene terephthalate. Switch parts as described in
7). The switch component according to any one of the above 1 to 6, which is a molded body welded by a laser welding method,
It is.

  The resin composition constituting the airtight switch part of the present invention has an effect of being excellent in laser weldability without impairing the characteristics of the conventional in-vehicle switch part.

Hereinafter, the present invention will be described in detail.
The molded body in the present invention is a molded body composed of two resin compositions integrated by welding. A molded product 1 made of a resin composition is an electrode plate on which metal terminals are arranged, and the movable element performs a switching function by sliding a contact on the electrode plate. Therefore, the molded product 1 is insert-molded with complicated metal terminals, and the resin material is required to have a thin-wall moldability. In addition, surface smoothness (mold transferability) and low warpage are also important in order to suppress contact wear during sliding.
The molded product 2 made of the resin composition is used for isolating and protecting the electrode plate from the external atmosphere, and is a molded product without a metal terminal. The shape of the molded product 2 is not limited in terms of function, but considering the weldability with the molded product 1, a shape excellent in low warpage is preferable. As the resin material, a material excellent in welding with the molded product 1, low warpage, and surface smoothness, preferably the same material as the molded product 1 is used. However, in the case of laser welding, it is necessary to divide the molded product 1 and the molded product 2 into a laser absorption side and a transmission side. In that case, various additives, colorants, plasticizers, nucleating agents, lubricants, stabilizers, antioxidants, ultraviolet absorbers, difficult to the laser absorption side and / or transmission side materials, as long as the desired properties are not impaired. A flame retardant, a mineral filler, etc. can be mix | blended suitably.

The molded product in which the molded product 1 and the molded product 2 are integrated by welding, that is, an airtight switch component, is preferably a vehicle-mounted switch component and a switch component for controlling the position. The mounting position is always exposed to heat from the engine and transmission and the environment outside the vehicle in the lower part of the vehicle. Therefore, the switch component is also required to have heat deterioration characteristics and calcium chloride resistance. These required properties are achieved by the following resin composition.
The component (A) in the present invention has a melting point of 170 to 260 ° C. and a crystallization temperature of 220 ° C. or less in the final resin composition, and the relationship between the melting point and the crystallization temperature is expressed by the formula Tm (melting point) ≧ Tc (crystallization temperature). ) A thermoplastic resin satisfying + 20 ° C. A thermoplastic resin having a melting point of 190 to 250 ° C. and a crystallization temperature of 210 or less, more preferably a melting point of 210 to 245 ° C. and a crystallization temperature of 200 to 160 ° C. According to the Japanese Industrial Standard (JIS) K-7121, the melting point and crystallization temperature used in the present invention were held at 300 ° C. for 3 minutes by DSC, and then lowered to 100 ° C. at a temperature lowering rate of 20 ° C./min. The crystallization peak top temperature that appears at this time is taken as the crystallization temperature, and further maintained at 100 ° C. for 3 minutes, and then the melting peak top temperature that appears when the temperature is raised to 300 ° C. at a temperature increase rate of 20 ° C./min is defined as the melting point. To do.

  The balance between the melting point and the crystallization temperature in the present invention is an important factor that determines the thin-wall formability, surface smoothness, easy weldability, and thermal deterioration characteristics. When the melting point is higher than 260 ° C., the weldability is adversely affected, and when it is lower than 170 ° C., the reliability of the heat deterioration property is lacking. On the other hand, if the crystallization temperature is higher than 220 ° C., the thin-wall moldability, surface smoothness and easy weldability are adversely affected. Furthermore, the relationship between the melting point and the crystallization temperature needs to satisfy the formula Tm (melting point) ≧ Tc (crystallization temperature) + 20 ° C., but when two or more thermoplastic resins are blended as described below, The above melting point and / or crystallization temperature may be detected, and in this case, the above relational expression is established for the melting point and crystallization temperature derived from each thermoplastic resin.

  The thermoplastic resin used in the present invention is not particularly limited as long as it satisfies the aforementioned melting point and crystallization temperature, but is preferably a polyamide resin or a polyester resin, and more preferably a polyamide resin. The polyamide resin is a copolymer of at least one kind of aliphatic polyamide and at least one kind of aromatic polyamide, and an aliphatic polyamide resin satisfying the aforementioned melting point and crystallization temperature may be mixed with the copolymer. it can. Specific examples of the aliphatic polyamide are one or more selected from polyamide 66, polyamide 6, polyamide 610, polyamide 612, polyamide 11 and polyamide 12, preferably polyamide 66, polyamide 6, polyamide 610 and polyamide 612. 1 or more types are preferably selected from polyamide 66 and polyamide 6 or polyamide 6.

  Specific examples of the aromatic polyamide include polyamide 6T obtained by polymerizing hexamethylenediamine and terephthalic acid, polyamide 6I obtained by polymerizing hexamethylenediamine and isophthalic acid, and polyamide obtained by polymerizing metaxylylenediamine and adipic acid. One or more selected from MXD6, preferably one selected from polyamide 6I and polyamide 6T, and more preferably polyamide 6I. The copolymer of the aliphatic polyamide and the aromatic polyamide is not limited to various combinations of the polyamides listed above, but is preferably polyamide 66 / 6I, 66 / 6I / 6T, 66/6 / 6I, 66/6 / 6I / 6T, MXD6 / 66, MXD6 / 6, MXD6 / 66/6, more preferably polyamide 66 / 6I, 66/6 / 6I, 66/6 / 6I / 6T, MXD6 / 66.

  Features of the above polyamide copolymer include the moldability, electrical properties, and low cost of the aliphatic polyamide, as well as the thin-wall moldability, low warpage, and low water absorption dimensions of the aromatic polyamide. It is to provide stability and calcium chloride resistance. The polyester resin is preferably at least one selected from polybutylene terephthalate (abbreviated as PBT), polyethylene terephthalate (abbreviated as PET), a PET copolymer and a PBT copolymer, and more preferably a copolymer of PBT and PBT. It is a copolymer of a polymer and PET. Although the polyester resin is inferior in molding fluidity and mechanical properties as compared with the polyamide resin, it can be suitably used for the part because it has excellent calcium chloride resistance and good weld deposit.

  (B) component in this invention is mix | blended mainly for the purpose of improving a mechanical characteristic and chemical resistance as a switch component, and is a fibrous glass filler with an average fiber diameter of 0.1-50 micrometers. Preferably, any of chopped strands, rovings and milled fibers having an average fiber diameter of 1 to 30 μm, more preferably an average fiber diameter of 5 to 20 μm may be used. When chopped strands are used, they can be appropriately selected and used within an average length of 0.1 to 7 mm. When the average fiber diameter is less than 0.1 μm, the substantial filler surface area increases, which adversely affects surface smoothness and low warpage. On the other hand, when the average fiber diameter exceeds 50 μm, the mechanical properties are inferior, and the thin molding fluidity is adversely affected.

The component (C) in the present invention is blended for imparting low warpage without impairing molding fluidity, mechanical properties, and surface smoothness, and is non-fibrous with an average particle size of 0.1 to 1000 μm. It is a glass filler. The average particle diameter is preferably 1 to 500 μm, the aspect ratio (particle diameter / thickness) is 10 or more, more preferably the average particle diameter is 5 to 400 μm, and the aspect ratio is 30 or more. When the average particle size is less than 0.1 μm, the mechanical properties are inferior, and when the average particle size is 100 μm, the thin molding fluidity is adversely affected.
The mixing ratio (B) / (C) of the component (B) and the component (C) in the present invention is 0.1 to 10. Preferably it is 0.2-5, More preferably, it is 0.5-2. When the mixing ratio (B) / (C) is less than 0.1, the mechanical characteristics and long-term heat resistance of the switch component cannot be satisfied. On the other hand, when the mixing ratio (B) / (C) exceeds 10, the low warpage property of the switch component is extremely deteriorated. The mixture of the component (B) and the component (C) in the present invention is 10 to 200 parts by weight, preferably 20 to 150 parts by weight, more preferably 30 to 100 parts by weight based on 100 parts by weight of the thermoplastic resin used in the present invention. It mix | blends in the ratio of a weight part. When the ratio of the mixture of component (B) and component (C) is less than 10 parts by weight, the switch part satisfies low warpage, dimensional stability, chemical resistance, electrical properties, mechanical properties, heat resistance, etc. When the amount exceeds 200 parts by weight, the flow of thin-walled molding is adversely affected, the amount of wear at the contact sliding portion of the switch component increases, and the molded product 1 and the molded product 2 are further increased. The strength of the welded part is reduced.

As the glass filler, those treated with a silane or titanate coupling agent can also be used. Moreover, inorganic fillers other than the component (B) and the component (C), particularly talc, kaolin clay, wollastonite, calcium carbonate, mica, and the like can be blended within a range not impairing the object of the present invention. In consideration of the thin-wall formability, mechanical properties, weldability and the like that are the characteristics of the present invention, 30 parts by weight or less is preferable.
The resin composition of the present invention has various additives as desired, for example, flame retardants, flame retardant dispersants such as polyalkylene alcohols or fatty acid esters, thermal stabilizers, ultraviolet absorbers, and oxidative degradation inhibitors. , Plasticizers, antistatic agents, weather resistance improvers, lubricants, mold release agents, fillers, dyes, pigments and the like, elastomers that improve impact resistance, other thermoplastic resins, etc. in a range that does not impair the purpose of the present invention Can be added.

  The method for producing the resin composition of the present invention may be performed by mixing and kneading the component (A), the component (B) and the component (C) and various additives used as desired. In that case, there is no restriction | limiting in particular in a mixing | blending procedure, a mixing method, and a kneading method. The resin composition is manufactured in a pellet form by a kneader, and the molded product 1 is manufactured by injection molding or compression insert molding in which the metal terminals are arranged in a mold. The pellets are manufactured by ordinary injection molding or compression molding. The method for welding the molded product 1 and the molded product 2 is not particularly limited, and an ultrasonic welding method, a laser welding method, a vibration welding method, a thermal welding method, a hot melt method, and the like are preferably used. The ultrasonic welding method and the laser welding method are preferable, and the laser welding method is more preferable.

EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited by these Examples. In addition, melting | fusing point of the raw material used for the present Example, crystallization temperature, and the evaluation method are as follows.
In accordance with Japanese Industrial Standard (JIS) K-7121, the melting point and crystallization temperature measured in this example were held at 300 ° C. for 3 minutes by DSC, and then lowered to 100 ° C. at a temperature lowering rate of 20 ° C./min. The crystallization peak top temperature that appears at this time is taken as the crystallization temperature, and further maintained at 100 ° C. for 3 minutes, and then the melting peak top temperature that appears when the temperature is raised to 300 ° C. at a temperature increase rate of 20 ° C./min is defined as the melting point. did.

(1) Molding fluidity: Molded product 1 in which a copper electrode plate is previously inserted in a mold and molded product 2 in which a copper electrode plate is not inserted are set to a cylinder temperature of 280 ° C. and a mold temperature of 80 ° C. using a NISSEI FE120 injection molding machine The injection speed, injection pressure, and holding pressure were appropriately adjusted so that the filling time was in the range of 0.8 to 1.3 seconds. The filling state of the obtained molded product 1 and molded product 2 was evaluated in the following four stages. (Note that the molded product 1 was dry blended with 0.1 parts by weight of carbon black with respect to 100 parts by weight of the resin composition described later before injection molding the molded product.)
A: Completely filled. Complete filling is possible even at a cylinder temperature of 270 ° C.
○: Completely filled under the above conditions.
Δ: Completely filled due to condition change (cylinder temperature increase), etc.
X: There is an unfilled portion under any molding condition.

(2) Low warpage: In the molded product 1 obtained in (1), the flatness in the vicinity of the sliding portion with the mover was measured using a Mitutoyo Co., Ltd. three-dimensional measuring device AE122.
(3) Surface smoothness: In the molded product 1 obtained in (1), using a surface roughness measuring device Surfcom 570A manufactured by Tokyo Seimitsu Co., Ltd. It was measured.
(4) Calcium chloride resistance: The molded product 1 obtained in (1) was left at 80 ° C. and 95% RH for 24 hours, and then immersed in a saturated calcium chloride aqueous solution at 23 ° C. for 1 minute. Thereafter, the surface condition after 20 cycles of the test with the following conditions as one cycle was evaluated in the following four stages.
1 cycle: 80 ° C., 95%, left for 1 hour → 23 ° C., left for 1 hour → 90 ° C., left for 1 hour → left for 23 ° C. for 1 hour.
A: No change in the surface state.
○: Slight cloudiness is confirmed on the surface, and there are no fine cracks.
(Triangle | delta): Cloudiness is confirmed on the surface and the fine crack has generate | occur | produced in a part of end surface of a molded article.
X: Fine cracks occur over the entire surface of the molded product.

(5) Mechanical properties: using IS50EP injection molding machine manufactured by Toshiba Machine Co., Ltd., setting the cylinder temperature to 280 ° C and the mold temperature to 80 ° C, so that the injection time, injection pressure, A tensile test piece was obtained by appropriately adjusting the holding pressure. The test was conducted according to ASTM D638.
(6) Thermal degradation characteristics: The test piece obtained in (5) was left in a hot air dryer at 150 ° C. for 1000 hours and then taken out, left at 23 ° C. and 50% RH for 1 hour, and conformed to ASTM D638. The test was conducted.
(7) Sliding characteristics: After the mover shown in FIG. 5 is attached to the molded product 1 obtained in (1) as shown in FIG. 1, a 0.2 kg weight is placed near the tip of the mover. As indicated by the arrow, sliding was reciprocated 10,000 times along the copper electrode plate of the molded product 1. Thereafter, as shown in FIG. 3, the maximum wear depth of the copper plate of the mover and the maximum wear depth Rmax of the resin of the molded product 1 were measured using a surface roughness measuring instrument Surfcom 570A manufactured by Tokyo Seimitsu Co., Ltd.

(8) Weldability: After fixing the molded product 1 and the molded product 2 with a jig as shown in FIG. 7, the output is 45 W, the wavelength is 940 nm, the control speed is 10 mm / s with a laser welding machine manufactured by LEISTER. The entire periphery of the molded product was irradiated under the conditions of After welding, the welding state was evaluated in the following four stages.
(Double-circle): It welds firmly over the perimeter of a molded article, and cannot be destroyed easily.
○: Although welded over the entire circumference of the molded product, it can be partially broken.
Δ: Although welded over the entire periphery of the molded product, it can be easily broken.
X: Almost no welding.

The raw materials used in this example are shown below.
The component (A) used in this example is obtained by the following method, but is not limited to these production methods.
A-1: 4.0 kg of equimolar salt of adipic acid and hexamethylene diamine, 1.0 kg of equimolar salt of isophthalic acid and hexamethylene diamine, 0.2 kg of adipic acid, and 5.0 kg of pure water were fully charged in an autoclave. Stir. Thereafter, the temperature was raised from room temperature to 220 ° C. with stirring for about 1 hour while purging with nitrogen. At this time, although the internal pressure was 1.76 MPa-G due to the natural pressure of water vapor in the autoclave, the heating was further continued while removing water from the reaction system so that the pressure was not higher than 1.76 MPa-G. After 2 hours, when the internal temperature reached 260 ° C., the heating was stopped, the autoclave discharge valve was closed, and the system was cooled to room temperature over about 8 hours. After cooling, the autoclave was opened, and about 4 kg of polymer was taken out and ground. The obtained pulverized polymer was put in an evaporator and subjected to solid phase polymerization at 200 ° C. for 10 hours under a nitrogen stream. The ratio of the polyamide 66 / 6I copolymer obtained by solid phase polymerization was 80/20.

  A-2: 4.0 kg of equimolar salt of adipic acid and hexamethylene diamine, 1.4 kg of equimolar salt of isophthalic acid and hexamethylene diamine, 0.2 kg of adipic acid, and 5.0 kg of pure water were fully charged in an autoclave. Stir. Thereafter, the temperature was raised from room temperature to 220 ° C. with stirring for about 1 hour while purging with nitrogen. At this time, the internal pressure was 1.76 MPa-G due to the natural pressure of water vapor in the autoclave, but the heating was further continued while removing water from the reaction system so that the pressure was not higher than 1.76 MPa-G. After 2 hours, when the internal temperature reached 260 ° C., the heating was stopped, the autoclave discharge valve was closed, and the system was cooled to room temperature over about 8 hours. After cooling, the autoclave was opened, and about 4 kg of polymer was taken out and ground. The obtained pulverized polymer was put in an evaporator and subjected to solid phase polymerization at 200 ° C. for 10 hours under a nitrogen stream. The ratio of the polyamide 66 / 6I copolymer obtained by solid phase polymerization was 75/25.

  A-3: 3.5 kg of equimolar salt of adipic acid and hexamethylenediamine, 1.0 kg of equimolar salt of isophthalic acid and hexamethylenediamine, 0.5 kg of equimolar salt of terephthalic acid and hexamethylenediamine, and 0. 2 kg and 5.0 kg of pure water were charged into an autoclave and sufficiently stirred. Thereafter, the temperature was raised from room temperature to 220 ° C. with stirring for about 1 hour while purging with nitrogen. At this time, the internal pressure was 1.76 MPa-G due to the natural pressure of water vapor in the autoclave, but the heating was further continued while removing water from the reaction system so that the pressure was not higher than 1.76 MPa-G. After 2 hours, when the internal temperature reached 260 ° C., the heating was stopped, the autoclave discharge valve was closed, and the system was cooled to room temperature over about 8 hours. After cooling, the autoclave was opened, and about 4 kg of polymer was taken out and ground. The obtained pulverized polymer was put in an evaporator and subjected to solid phase polymerization at 200 ° C. for 10 hours under a nitrogen stream. The ratio of the polyamide 66 / 6I / 6T copolymer obtained by solid phase polymerization was 70/20/10.

  A-4: 3.75 kg of equimolar salt of adipic acid and hexamethylenediamine, 0.75 kg of equimolar salt of isophthalic acid and hexamethylenediamine, 0.5 kg of ε-caprolactam, 0.2 kg of adipic acid, and pure water 5. 0 kg was charged into an autoclave and sufficiently stirred. Thereafter, the temperature was raised from room temperature to 220 ° C. with stirring for about 1 hour while purging with nitrogen. At this time, the internal pressure was 1.76 MPa-G due to the natural pressure of water vapor in the autoclave, but the heating was further continued while removing water from the reaction system so that the pressure was not higher than 1.76 MPa-G. After 2 hours, when the internal temperature reached 260 ° C., the heating was stopped, the autoclave discharge valve was closed, and the system was cooled to room temperature over about 8 hours. After cooling, the autoclave was opened, and about 4 kg of polymer was taken out and ground. The obtained pulverized polymer was put in an evaporator and subjected to solid phase polymerization at 200 ° C. for 10 hours under a nitrogen stream. The ratio of the polyamide 66 / 6I / 6 copolymer obtained by solid phase polymerization was 75/15/10.

  A-5: 3.0 kg of equimolar salt of adipic acid and hexamethylenediamine, 1.0 kg of equimolar salt of isophthalic acid and hexamethylenediamine, 0.5 kg of equimolar salt of terephthalic acid and hexamethylenediamine, and ε-caprolactam 0 0.5 kg, 0.2 kg of adipic acid and 5.0 kg of pure water were charged into an autoclave and sufficiently stirred. Thereafter, the temperature was raised from room temperature to 220 ° C. with stirring for about 1 hour while purging with nitrogen. At this time, the internal pressure was 1.76 MPa-G due to the natural pressure of water vapor in the autoclave, but the heating was further continued while removing water from the reaction system so that the pressure was not higher than 1.76 MPa-G. After 2 hours, when the internal temperature reached 260 ° C., the heating was stopped, the autoclave discharge valve was closed, and the system was cooled to room temperature over about 8 hours. After cooling, the autoclave was opened, and about 4 kg of polymer was taken out and ground. The obtained pulverized polymer was put in an evaporator and subjected to solid phase polymerization at 200 ° C. for 10 hours under a nitrogen stream. The ratio of the polyamide 66 / 6I / 6T / 6 copolymer obtained by solid phase polymerization was 60/20/10/10.

A-6: Polyamide MXD6 / 66, trade name Reny 6002 [Mitsubishi Engineering Plastics Co., Ltd.]
A-7: Polyamide 66, trade name Leona 1300S [manufactured by Asahi Kasei Chemicals Corporation]
A-8: Polyamide 6, trade name 1013B [manufactured by Ube Industries, Ltd.]
A-9: PBT, trade name DURANEX 2002 [manufactured by Wintech Polymer Co., Ltd.]
Component (B): Fibrous glass filler, trade name CS03JA416 (average fiber diameter 10 μm) [manufactured by Asahi Fiber Glass Co., Ltd.]
Ingredient (C): Non-fibrous glass filler, trade name REFG-302 [manufactured by Nippon Sheet Glass Co., Ltd.]
Ingredient (D): Talc, trade name Hytron [manufactured by Takehara Chemical Industry Co., Ltd.]
Ingredient (E): Mica, trade name M-325CT [manufactured by Repco, Inc.]
Ingredient (F): Kaolin clay, trade name Translink 445 [manufactured by Engelhard]

[Example 1]
As component (A), 100 parts by weight of A-1 and 35 parts by weight of component (C), trade name Irgafos 168 (manufactured by Ciba Geigy) as an antioxidant is 2000 ppm relative to the polymer component, and trade name is calcium stearate as a lubricant. S [manufactured by Nippon Oil & Fats Co., Ltd.] is mixed in advance with a tumbler mixer with 1000 ppm of the polymer component, and is fed into a TEM35φ twin screw extruder (setting 280 ° C., screw rotation speed 300 rpm) manufactured by Toshiba Machine Co. Then, 35 parts by weight of the component (B) was supplied from the side feed, and the melt-kneaded product extruded from the spinning nozzle was cooled with water in a strand form and pelletized to obtain the resin composition of Example 1. The evaluation results are shown in Table 1.

[Examples 2 to 15]
As component (A), one or two of A-2 to A-9 shown in Table 1 are used instead of A-1, and components (B) to (F) are used as shown in Tables 1 and 2, respectively. A resin composition was obtained in the same manner as in Example 1 except that the formulation was changed. The evaluation results are shown in Tables 1 and 2.

[Comparative Examples 1-3]
Resin composition in the same manner as in Example 1 except that component (A) was changed to A-7 instead of A-1, combined use of A-1 and A-7, and combined use of A-2 and A-7. Got. The evaluation results are shown in Table 1.

[Comparative Examples 4 to 9]
When changing the compounding ratio of component (B) to component (F) and supplying component (B), it is from side feed, and when component (C) to component (F) is supplied, except from the feed hopper A resin composition was obtained in the same manner as in Example 1. The evaluation results are shown in Table 2.
Examples 1 to 15 are molding fluidity, low warpage, surface smoothness, calcium chloride resistance, mechanical properties, thermal deterioration properties, sliding properties, and laser weldability, which are performances for establishing the part. Excellent balance. Since Comparative Examples 1 to 3 have a high melting point and crystallization temperature, they adversely affect molding fluidity, low warpage, surface smoothness, laser weldability, and the like. Comparative Example 4 is the component (B) alone, and the low warpage is extremely deteriorated. Comparative Example 5 is relatively good in terms of performance balance, but has a disadvantage in terms of cost. In Comparative Examples 6 to 9, the components (D) to (F) are slightly inferior in mechanical properties and heat deterioration properties, and have a bad influence on laser weldability because the laser transmittance is extremely low.

  Since the airtight switch component formed of the resin composition of the present invention has excellent durability even in a harsh environment, it can be suitably used particularly in the automobile field.

It is the figure of the molded article 1 and the needle | mover in which the copper terminal was inserted. It is the figure of the molded article 2 for carrying out sealing protection of the molded article 1 by welding. It is AA sectional drawing of the molded article 1 in FIG. 1, and a needle | mover. It is AA sectional drawing of the molded article 1 in FIG. It is AA sectional drawing of the needle | mover in FIG. It is BB sectional drawing of the molded article 2 in FIG. It is AA, BB sectional drawing when the molded products 1 and 2 and the needle | mover are assembled | attached and welded.

Claims (7)

A molded article in which a molded article 1 made of a resin composition in which a metal terminal is insert-molded and a molded article 2 made of a resin composition that hermetically protects the metal terminal portion are welded together to form a thermoplastic resin ( A) Mixing ratio of the fibrous glass filler (B) having an average fiber diameter of 0.1 to 50 μm and the non-fibrous glass filler (C) having an average particle diameter of 0.1 to 1000 μm with respect to 100 parts by weight (B) / A switch component comprising a resin composition containing 10 to 200 parts by weight of a mixture in which (C) is 0.1 to 10.
However, the resin composition (A) has a melting point (Tm) of 170 to 260 ° C. and a crystallization temperature (Tc) of 220 ° C. or less and satisfies the following formula.
Tm (melting point) ≧ Tc (crystallization temperature) + 20 ° C. 2. The switch component according to claim 1, wherein the thermoplastic resin (A) is a copolymer and / or a mixture of at least one aliphatic polyamide and at least one aromatic polyamide. The switch component according to claim 1, wherein the thermoplastic resin (A) is a polyester resin. The switch component according to claim 1, wherein the aliphatic polyamide according to claim 2 is selected from polyamide 66, polyamide 6, polyamide 610 and polyamide 612. The switch component according to claim 1, wherein the aromatic polyamide according to claim 2 is selected from polyamide 6T, polyamide 6I, and polyamide MXD6. The polyester resin according to claim 3 is at least one selected from polybutylene terephthalate, polyethylene terephthalate, a copolymer of polybutylene terephthalate, and a copolymer of polyethylene terephthalate. The switch part described in any one. The switch component according to claim 1, wherein the switch component is a molded body welded by a laser welding method.

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