JP2010228798A - Heat insulating container, method for manufacturing heat insulating container, method for bonding molded article made of resin with high melting point, and molded article made of resin with high melting point - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide stably a heat insulating container achieving an internal container which has a small variation of strength and is highly reliable by applying an anti-oxidant on a bonding point in a non-contacting hot plate welding of a resin with a high melting point such as polyphthalamide resin to control thermal decomposition of the resin at a higher temperature than the melting point. <P>SOLUTION: In the heat insulating container 1 storing a liquid at a maintained temperature, the internal container 10 provided in the heat insulating container 1 to store the liquid forms a liquid storing space by jointing a jointing member made of polyphthalamide containing a glass fiber, and jointing of the jointing member is performed by jointing a jointing part coated with the anti-oxidant by the non-contacting hot plate welding method. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a heat insulating container that retains and retains liquid, and particularly relates to a heat insulating container that retains and retains coolant for a vehicle engine and a method for manufacturing the same.

  In recent years, there has been a strong demand for lower fuel consumption of vehicle engines as a countermeasure against global warming. In particular, improving the fuel efficiency during warm-up operation immediately after engine startup has become a major issue. In order to improve the fuel efficiency immediately after the start of the vehicle engine, the coolant of the vehicle engine (long life coolant: hereinafter referred to as LLC) is kept warm and stored, and the LLC kept warm at the time of engine start is stored in the engine. As a heat insulating container necessary to circulate and promote engine warm-up, an inner container that stores liquid and a surrounding outer sheet is wrapped with a sheet-shaped outer packaging material, and a vacuum insulation space is provided between the inner container and the outer packaging material. There is known a heat insulating container that forms (Patent Document 1).

  In addition, as a material for the LLC storage inner container, a polyphthalamide resin containing glass fiber that is lightweight, has high heat resistance and high strength and has excellent chemical resistance such as LLC is used. A container having a space inside the resin is produced by joining two or more molded bodies obtained by an inexpensive injection molding method. However, in an LLC storage container, the internal pressure exceeds atmospheric pressure. Since it raises, high intensity | strength is requested | required of the junction part.

JP 2008-105748 A JP-A-8-294970 JP 2008-213430 A JP 2006-123378 A JP 2006-346944 A

  As a high-strength bonding method for resin, welding to heat and melt the bonded portion is widely used. Depending on the type of resin used, the shape of the bonded part, etc., `` vibration welding '', `` ultrasonic welding '', `` It is selected from various methods such as “electromagnetic induction heating type welding” and “non-contact type hot plate welding”. Next, problems in the case of welding a polyphthalamide resin containing glass fibers are listed.

  First, when “vibration welding” (Patent Document 2) is selected, before the polyphthalamide reaches the melting point and completely melts, the glass fiber contained when the resin is softened is extruded to generate brittle burrs. To do. Although the burr generated on the outer periphery of the container can be easily removed, it is difficult to completely remove the burr generated inside the container, and it may remain inside the product and be mixed into the LLC.

  In “ultrasonic welding” (Patent Document 3), the welding machine includes an ultrasonic oscillator that generates ultrasonic vibrations and a horn that amplifies the generated vibrations. This horn requires an individual shape design depending on the workpiece shape, workpiece mass, etc., and is not suitable for changing the shape in a short period of time or manufacturing a variety of products. Moreover, in addition to the complicated container shape that matches the shape of the space, it is necessary to join a partition plate having a thickness different from that of the outer wall provided inside the container to the heat insulating container installed in the engine room at the same time. It is difficult to transmit ultrasonic vibrations uniformly to all the joint surfaces.

  Furthermore, since “electromagnetic induction heating type welding” (Patent Document 4) heats a non-heated object arranged in a coil using electromagnetic induction, the object to be heated needs to be a conductor. In the case of welding between resins, it is necessary to arrange a metal wire or the like that becomes a non-heated material at the joint. Similarly to ultrasonic welding, if it is a simple shape, it can generate heat uniformly without any problems, but it is also a complicated shape and a partition plate with a different thickness from the outer wall provided inside the container can be used at the same time. It is difficult to apply to the invention of the present application that needs to be joined.

In view of the above-mentioned problems, the “non-contact type hot plate welding method” (Patent Document 5) is most suitable for the present invention.
Here, the "non-contact type hot plate welding method" is arranged with the resin joints facing each other, and after inserting the hot plate between them and heating and melting the joints in a non-contact manner, This is a welding method in which the hot plate is removed and the joints are pressure-bonded. By using this method, polyphthalamide resin can be easily welded, and it is possible to cope with complex shapes and simultaneously weld partition plates having different thicknesses from the outer wall provided inside the container. .

  However, when the area of the joint portion is increased, there is a problem that partial strength variation is greatly generated, and stable manufacturing is difficult. This is because polyphthalamide has a melting point of about 320 ° C., and a high melting point resin has a small difference between the melting point and the thermal decomposition temperature. In order to perform reliable welding, the temperature of the joint portion must reach the melting point, and if the melting point is lower than the melting point, the strength is lowered. If the area of the joint portion increases, it is difficult to heat all of the joint portions to a uniform temperature. Therefore, it is considered that the joint surface varies in temperature and causes a partial decrease in strength.

  Therefore, in view of the above problems, the present invention is a non-contact type hot plate welding of a high melting point resin such as a polyphthalamide resin. By applying an anti-aging agent to the joint, the heat of the resin at a temperature exceeding the melting point is obtained. By controlling the decomposition, an object is to realize a highly reliable inner container with small variation in strength and to stably provide a heat insulating container.

In order to achieve the above object, the first invention is a heat insulating container for storing and storing a liquid, and the inner container provided inside the heat insulating container for storing the liquid is made of a high melting point resin containing reinforcing fibers. The liquid storage space is formed by joining a plurality of joining members. The joining of the joining members is obtained by joining the joints coated with the anti-aging agent by the non-contact hot plate welding method. It is the heat insulation container characterized by this.
According to a second aspect of the present invention, the joining portion of the joining member includes a partition plate portion provided for partitioning the inside of the inner container in addition to the outer wall portion that forms the liquid storage space of the inner container. It is the same insulated container.
A third invention is the heat insulating container, wherein the high melting point resin is a polyphthalamide resin.
According to a fourth aspect of the present invention, the anti-aging agent is selected from an amine-ketone system, an aromatic secondary amine system, a benzimidazole system, a dithiocarbamate system, and a phosphorous acid system, and the thermal decomposition temperature is 320 ° C. or higher. It is the heat insulation container characterized by having.
5th invention is the manufacturing method of the heat insulation container which heat-retains liquid, Comprising: The internal container provided in a heat insulation container in order to store a liquid reinforces an internal container by joining several joining members An inner container having a liquid storage space by molding a bonding member made of a high melting point resin containing fibers, applying an anti-aging agent to the bonding portion of the bonding member, and then bonding by a non-contact hot plate welding method It is produced as follows. It is the manufacturing method of the heat insulation container characterized by the above-mentioned.
A sixth invention is a method for producing the heat insulating container, wherein the anti-aging agent is applied by impregnating the joint with a 0.1 to 5 wt% anti-aging agent solution using an organic solvent as a solvent.

The seventh invention is a method for joining a molded article made of a high melting point resin containing reinforcing fibers, wherein an anti-aging agent is applied to the joined portion of a joining member made of a high melting point resin containing reinforcing fibers, and then contactless A joining method for high-melting-point resin molded products, characterized in that the joining members are joined together by a hot plate welding method to obtain a molded product made of high-melting-point resin containing reinforcing fibers.
According to an eighth aspect of the present invention, there is provided the molded article made of the high melting point resin, wherein the anti-aging agent is applied by impregnating the joint part with an anti-aging agent solution of 0.1 to 5 wt% using an organic solvent as a solvent. It is a joining method.
A ninth invention is a molded article made of a high melting point resin containing a reinforcing fiber constituted by joining a plurality of joining members, and joining of the joining members is performed by joining a joint portion to which an anti-aging agent is applied. It is a molded article made of a high melting point resin characterized by being joined by a non-contact hot plate welding method.
According to a tenth aspect of the present invention, in the joint portion of the joining member, in addition to an outer portion that forms an outer structure of a high melting point resin molded product, an inner portion that forms the inner structure is also included. It is a molded product made of high melting point resin.
An eleventh invention is the molded article made of the high melting point resin, wherein the high melting point resin is a polyphthalamide resin.
In a twelfth aspect of the invention, the anti-aging agent is selected from amine-ketones, aromatic secondary amines, benzimidazoles, dithiocarbamates, and phosphorous acids, and the thermal decomposition temperature is 320 ° C. or higher. This is a molded product made of the same high melting point resin.

In addition, when the present invention is regarded as an invention related to the “inner container”, the following invention is also established.
(1) In a heat insulating container that retains and retains liquid, it is an inner container provided inside the heat insulating container for storing liquid, and the inner container joins a plurality of joining members made of high melting point resin containing reinforcing fibers. The liquid storage space is formed by connecting the joint member with an anti-aging agent-coated joint by a non-contact hot plate welding method. It is a container.
(2) The joining portion of the joining member includes a partition plate portion provided to partition the inside of the inner container in addition to the outer wall portion that forms the liquid storage space of the inner container ( 1) It is an internal container as described.
(3) The internal container according to (1) or (2), wherein the high melting point resin is a polyphthalamide resin.
(4) The anti-aging agent is selected from amine-ketone, aromatic secondary amine, benzimidazole, dithiocarbamate, and phosphorous acid, and has a thermal decomposition temperature of 320 ° C. or higher. The internal container according to any one of (1) to (3).
(5) A heat insulating container that retains and retains liquid, and is a method of manufacturing an inner container that is provided inside a heat insulating container for storing liquid, and the inner container is configured by joining a plurality of members. After forming a joining member made of a high melting point resin containing reinforcing fibers and applying an anti-aging agent to the joining part of the joining member, the joining part is joined by a non-contact hot plate welding method, and a liquid storage space is provided. It is characterized by producing an inner container.
(6) The inner container for an insulated container according to (5), wherein the anti-aging agent is applied by impregnating the bonding portion with an anti-aging agent solution of 0.1 to 5 wt% using an organic solvent as a solvent. It is a manufacturing method.

The present invention has the following effects.
(1) By using an anti-aging agent for non-contact hot plate welding of high melting point resin such as polyphthalamide resin, the strength variation of the joint is suppressed, and the heat insulating container containing the highly reliable inner container is stabilized. Can be supplied.
(2) By reducing the strength variation, the thickness of the outer wall of the inner container can be reduced, the amount of resin used can be reduced, and the manufacturing cost can be reduced.
(3) In addition, since it is possible to reliably weld a high melting point resin such as polyphthalamide resin by non-contact hot plate welding, it is possible to manufacture a complex-shaped inner container. For example, it becomes possible to produce an internal container having a complicated structure such as a partition plate inside the container. Further, it is possible to produce an inner container having a complicated outer shape (outer wall shape).

Sectional drawing which shows the example of heat insulation container which concerns on this invention Thermal analysis results of polyphthalamide (in air) Thermal analysis result of polyphthalamide (in nitrogen atmosphere) Structure diagram of 4,4'-bis (α, α-dimethylbenzyl) diphenylamine Explanatory drawing of inner container production (1) Explanatory drawing of inner container production (2) Explanatory drawing of inner container production (3) Explanatory drawing of inner container production (4) Cross-sectional view of laminate film as exterior material Illustration of non-contact hot plate welding Tensile strength measurement results (Example) Tensile strength measurement results (comparative example)

  An example of a heat insulating container of the present invention is shown in FIG. In the present invention, a heat insulating material 20 and a gas adsorbing material (getter material) 21 are arranged around the inner container 10 provided with the liquid inflow / outlet portion 13, wrapped in a sheet-shaped exterior material 30 and vacuum-sealed, The inner container 10 is covered with a vacuum heat insulating material without any gaps to provide a high performance heat insulating container 1. Further, the inner container 10 is made of resin, and in addition to being manufactured by an injection molding method, the sheet-like exterior material is flexible, and therefore has an advantage that it can cope with various shapes.

Here, the material of the inner container 10 is polyphthalamide resin (PPA), polyphenylene sulfide (PPS), polyether ether ketone (PEEK), polyamide, which has high heat resistance, high strength, and excellent chemical resistance such as LLC. A high melting point resin having a melting point of 250 to 340 ° C. such as 66 (PA66) or polyethylene terephthalate (PET) can be suitably used.
In addition, it is preferable to use those high melting point resins containing “reinforcing fibers”. This is because the strength of the inner container is increased. Here, as the “reinforcing fiber”, for example, the following may be used.
(1) Type: glass fiber, carbon fiber (2) Fiber length: preferably 1-20 mm, more preferably 3-10 mm
(3) Fiber diameter: preferably 1-20 μm, more preferably 5-10 μm
(4) Mixing ratio: preferably 10 to 60%, more preferably 30 to 50%

  Since the resin material used as the inner container 10 has a large gas permeation amount that permeates the material itself, it is necessary to control the gas permeation in order to maintain the vacuum degree of the vacuum heat insulating layer over a long period of time. By taking measures such as wrapping the inner container 10 with a laminate film that includes a metal layer formed on the resin surface by plating or the like, or a sheet-like gas barrier layer that will be described later, it is effective for maintaining the degree of vacuum over a long period of time. It is done.

The thermal analysis results (differential scanning calorimetry: DSC) of the polyphthalamide resin are shown in FIGS. FIG. 2 shows the result of measurement in the atmosphere, and FIG. 3 shows the result of measurement in a nitrogen atmosphere.
An endothermic reaction showing the melting point of the polyphthalamide resin is observed at about 320 ° C. After that, when measured in the atmosphere, an exothermic peak can be confirmed at about 400 ° C. and 490 ° C., and it can be seen that thermal decomposition proceeds continuously. On the other hand, when measured in a nitrogen atmosphere, the exothermic peak at about 400 ° C was not observed, and the exothermic energy at the exothermic peak at about 490 ° C also decreased, so this is a thermal decomposition reaction involving oxidation. It can be estimated easily. Therefore, it is considered that the welding range can be expanded by controlling or delaying this reaction.

First, it can be improved if the polyphthalamide resin is welded in a nitrogen atmosphere in the same manner as in the above measurement, but this is not realistic because the manufacturing equipment investment and running cost during the production increase. Thus, as a result of intensive studies by the inventors of the present application, the use of an anti-aging agent which is low in cost and has a large effect of preventing a decrease in strength has been achieved.
When oxygen is present in the resin, the carbon-hydrogen bond with the weakest binding force in the molecule is first broken by the action of heat, light, and catalyst, and hydrogen is released. This is called a free radical (free radical), and the deterioration progresses as the generation of free radicals spreads in a chain. The anti-aging agent has hydrogen in its molecule that easily reacts with free radicals such as -NH- and -OH, and reacts with free radicals generated in the resin to make it a stable substance, thereby progressing deterioration. It has the effect | action which controls.

  The type of anti-aging agent is not particularly limited as long as the antioxidant effect is high. For example, amine-ketone type 2,2,4-trimethyl-1,2-dihydroquinoline polymer, aromatic secondary Amine-based 4,4-bis (α, α-dimethylbenzyl) diphenylamine, N, N'-di-2-naphthyl-p-phenylenediamine, benzimidazole-based zinc salt of 2-mercaptobenzimidazole and 2-mercapto It may be selected from methyl benzimidazole zinc salt, dithiocarbamate-based nickel dibutyldithiocarbamate, phosphite-based tris (nonylphenyl) phosphate, etc. That's fine. For example, if a polyphthalamide resin having a melting point of 320 ° C. is used, 4,4′-bis (α, α-dimethylbenzyl) diphenylamine can be suitably used (FIG. 4). Here, you may mix and use anti-aging agent in multiple types.

  Here, it is desirable that the anti-aging agent at the joint (joint surface) is uniformly dispersed. The method of impregnating the joint surface in a solution prepared by dissolving an anti-aging agent in an organic solvent such as acetone, toluene, methyl ethyl ketone, xylene, and benzene is optimal in terms of uniform application and cost. The organic solvent to be used is not particularly limited as long as the antioxidant is dissolved, but as an example, acetone can be suitably used when 4,4′-bis (α, α-dimethylbenzyl) diphenylamine is used. In addition, when the concentration of the solution is low, the anti-oxidation effect is small, and when the concentration is high, the polyphthalamide resin (high melting point resin) is lowered in temperature by the endothermic reaction caused by melting the anti-aging agent during heating, and it takes time for melting. Therefore, it may be 0.1 to 20 wt%, preferably 0.5 to 10 wt%, more preferably 1 to 5 wt%.

Next, a method for manufacturing the inner container 10 will be described with reference to FIGS. In FIG. 5, a jig for fixing the workpiece is omitted.
First, the joining members (semi-divided products) 11 and 12 made of polyphthalamide resin (high melting point resin) constituting the inner container 10 are manufactured by an injection molding method (FIG. 5-1).
Next, after the joint portion (joint surface) of the joining members 11 and 12 is impregnated with the above-described anti-aging solution 50, the solvent is dried and removed (FIG. 5-2).

Thereafter, the joining portions (joint surfaces) of the two joining members (molded articles) 11 and 12 are set on the jig so as to be separated and face each other, and the heated hot plate 60 is inserted between the joining portions (joint surfaces) ( Fig. 5-3). At this time, the temperature of the joining surfaces (surfaces) of the joining members 11 and 12 may be −10 to + 100 ° C., more preferably +10 to + 50 ° C. of the melting point of the resin. Specifically, when joining a molded product made of polyphthalamide resin, it may be 630 to 700 ° C, and more preferably 660 to 690 ° C.
And the hot platen 60 was extracted from between joining parts (joining surface), and was pressurized (FIGS. 5-4), and when the temperature of the joining part (joining surface) fell sufficiently, it removed from the jig and set it as the internal container 10. FIG.

  In FIG. 5, in addition to the outer wall portion in which the inner container 10 forms a liquid storage space, a partition plate 14 provided for partitioning the inside of the inner container 10 is also included. In addition, the inner partition plate 14 must be joined. And this invention is very effective as a preparation method of the internal container (molded article) which also requires joining of such an internal structure. That is, in the “vibration welding method” described in the background art, burrs are generated at the welded (joined) portion (particularly when a resin containing reinforcing fibers is used), and burrs generated inside the container are It is difficult to remove, and in some cases, it may be mixed into the liquid to be kept warm as foreign matter. Further, in the “ultrasonic welding method” and the “electromagnetic induction heating type welding method”, it is difficult to join the outer wall portion and the partition plate portion having different thicknesses at the same time. On the other hand, if the “non-contact type hot plate welding method” according to the present invention is used, the internal container 10 having a complicated internal structure such as the partition plate 14 shown in FIG. 5 can be reliably produced. .

  Next, an example of the exterior material 30 is shown in a schematic diagram (FIG. 6). The sheet-shaped exterior material 30 is a laminated film in which a plurality of films are laminated. The main purpose of the protective layer on the surface is to prevent the occurrence of defects such as holes and cracks in the gas barrier layer. When the adhesive layer is thermally welded, the adhesive layers are opposed to each other and heat is applied from the protective layer side of the surface. Therefore, the melting point of the protective layer is preferably at least 50 ° C. higher than the melting point of the adhesive layer. Polyethylene terephthalate and nylon can be preferably used. Next, since the gas barrier layer is intended for gas permeation control, a metal foil is desirable. An inexpensive aluminum foil can be suitably used, and the thickness may be 5 to 30 μm, more preferably 7 to 12 μm. Moreover, polyethylene, polypropylene, ethylene vinyl alcohol, etc. can be used conveniently for a contact bonding layer, and thickness is 30-30 micrometers desirable.

The heat insulating material 20 to be included is made of glass wool, rock wool, or ceramic fiber, and it is desirable to use glass wool having an average fiber diameter of 5 μm or less and dried adsorbed moisture in a high temperature atmosphere.
In addition, when a heat insulation layer is used for a long time, there exists a possibility that a vacuum degree may fall with the gas etc. which generate | occur | produce from the heat insulating material 20, the gas which permeate | transmits joining part resin, and the gas for adsorb | sucking the gas inside a heat insulation layer in order to prevent it The adsorbent 21 is indispensable. The gas adsorbent 21 is preferably calcium oxide that mainly adsorbs moisture, barium / lithium alloy that mainly adsorbs oxygen and nitrogen, and cobalt oxide that mainly adsorbs hydrogen. However, when each gas adsorbent 21 is enclosed alone, the barium / lithium alloy adsorbs moisture generated from the heat insulating material, and there is a problem that the target oxygen and nitrogen adsorbing capacity is lowered, so that barium / lithium is present. A three-layer structure including a calcium oxide layer and a cobalt oxide layer with an alloy layer as an intermediate layer is preferable (not shown).

  Originally, it should be noted regarding the welding of the inner container 10, but the container shape is complicated, and the results of measuring the tensile strength by cutting the outer wall are different from each other at the cutting points. Therefore, in order to clarify the effect of the anti-aging agent on the non-contact hot plate welding of the polyphthalamide resin, an example using a test piece is shown here.

A strength test piece (JIS K 7162) was produced by injection molding using a polyphthalamide resin. It cut | disconnected in the center part of this strength test piece, and this cutting location was made into the welding junction part. The bonding area is 4 × 10 mm and 40 mm ² .

  4,4'-bis (α, α-dimethylbenzyl) diphenylamine was used as an anti-aging agent and dissolved in acetone at a concentration of 3 wt%. The joint portion of the test piece was impregnated in this anti-aging solution, and allowed to stand at room temperature for about 30 minutes to evaporate acetone as a solvent, and then set on a welding jig. At this time, when the hot plate was inserted, the height was adjusted so that the distance between the hot plate upper side and the upper test piece was 1.5 mm, and the distance between the hot plate lower side and the lower test piece was 0.8 mm (FIG. 7). . A hot plate heated to 690 ° C. was inserted between the test pieces, and the joint was heated and melted. This heating time is performed in the range of 13 to 19 seconds. After heating, the hot plate was removed and pressurized, left for 30 seconds, then removed from the jig, and the tensile strength was measured. The measurement results of the tensile strength are shown in FIG.

[Comparative example]
As a comparative example, a welded test piece of polyphthalamide resin not using an anti-aging agent was prepared as in the example. All were performed under the same conditions as in the Examples except that the heating time was in the range of 12 to 21 seconds. The measurement result of tensile strength is shown in FIG.

  Comparing FIG. 8 (Example) and FIG. 9 (Comparative Example), it can be seen that FIG. 8 (Example) can maintain a high strength of 2000 N or more over a longer time than FIG. 9 (Comparative Example). From these results, it was possible to confirm the effect of increasing the high strength range and reducing the strength variation by applying the anti-aging agent. According to the present invention, it can be expected that a highly reliable internal container can be stably supplied.

  According to this invention, it can utilize as a heat insulation container which heat-retains a liquid, and is applied to the heat insulation container which heat-retains the LLC of the vehicle engine especially. In addition, it can also be used for a heat retaining container such as an electric pot or a cold container such as a liquefied gas.

1 Insulated container 10 Inner container 11 Joining member (half product)
12 Joining parts (half-cut product)
13 Inlet / Outlet Portion 14 Partition Plate 15 Outer Wall 20 Heat Insulating Material 21 Gas Adsorbent (Getter Material)
30 exterior material 50 anti-aging solution 60 hot plate

Claims (12)

An insulated container for storing and storing liquid,
The internal container provided inside the heat insulating container for storing liquid is configured to form a liquid storage space by joining a plurality of joining members made of high melting point resin containing reinforcing fibers,
A heat insulating container characterized in that the joining of the joining members is a joining part to which an anti-aging agent is applied, joined by a non-contact hot plate welding method.   The partition part provided in order to partition the inside of an internal container other than the outer wall part which forms the liquid storage space of an internal container is also contained in the junction part of the said joining member, The inside is characterized by the above-mentioned. Insulated container.   The heat insulating container according to claim 1 or 2, wherein the high melting point resin is a polyphthalamide resin.   The anti-aging agent is selected from amine-ketones, aromatic secondary amines, benzimidazoles, dithiocarbamates, and phosphorous acids, and has a thermal decomposition temperature of 320 ° C. or higher. The heat insulation container in any one of Claim 1 to 3. A method for manufacturing an insulated container for storing and storing liquid,
An internal container provided inside the heat insulating container for storing liquid forms a joining member made of a high melting point resin containing reinforcing fibers constituting the internal container by joining a plurality of joining members, and joining the joining members A method for producing a heat-insulating container, characterized in that an anti-aging agent is applied to the part and then bonded by a non-contact hot plate welding method to produce an inner container having a liquid storage space.   6. The method for producing a heat-insulating container according to claim 5, wherein the anti-aging agent is applied by impregnating the joint with a 0.1 to 5 wt% anti-aging agent solution using an organic solvent as a solvent. A method of joining a molded article made of a high melting point resin containing reinforcing fibers,
After applying an anti-aging agent to the joint portion of the high melting point resin-containing joining member containing the reinforcing fiber, the joining members are joined to each other by a non-contact hot plate welding method, and the molded product made of the high melting point resin containing the reinforcing fiber A method of joining a molded product made of a high melting point resin, characterized in that:   8. The method for bonding a molded article made of a high melting point resin according to claim 7, wherein the anti-aging agent is applied by impregnating the bonding portion with an anti-aging solution of 0.1 to 5 wt% using an organic solvent as a solvent. . It is a molded product made of high melting point resin containing reinforcing fibers constituted by joining a plurality of joining members,
The high melting point resin molded product characterized in that the bonding of the bonding member is a bonding portion to which an anti-aging agent is applied, bonded by a non-contact hot plate welding method.   10. The high melting point according to claim 9, wherein the joint part of the joining member includes an inner part forming the internal structure in addition to the outer part forming the external structure of the high melting point resin molded product. Plastic molded product.   The molded article made of a high melting point resin according to claim 9 or 10, wherein the high melting point resin is a polyphthalamide resin.   The anti-aging agent is selected from amine-ketones, aromatic secondary amines, benzimidazoles, dithiocarbamates, and phosphorous acids, and has a thermal decomposition temperature of 320 ° C. or higher. The molded article made of a high melting point resin according to any one of claims 9 to 11.

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