WO2008059868A1

WO2008059868A1 - Moistureproof insulating coating material supply apparatus

Info

Publication number: WO2008059868A1
Application number: PCT/JP2007/072084
Authority: WO
Inventors: Takuya Sugishita; Masahiro Kimura
Original assignee: Hitachi Chemical Company, Ltd.
Priority date: 2006-11-16
Filing date: 2007-11-14
Publication date: 2008-05-22
Also published as: TW200843865A; TWI350208B

Abstract

This invention provides a moistureproof insulating coating material supply apparatus which, even when a coating material dissolved in and diluted with a solvent is used, does not cause foaming of a coating material and can provide a highly reliable electric and electronic components subjected to insulation treatment with a high-quality insulating coating film. In the moistureproof insulating coating material supply apparatus, a flexible vessel deformable by the pressure of a high-pressure gas atmosphere within the pressure vessel is used as a coating material supply vessel, which is housed in the pressure vessel, is pressurized by a high-pressure gas within the pressure vessel and delivers the coating material within the vessel to the outside of the vessel through a coating material lead-out pipe. This vessel has a lid having such a construction that can shield the atmosphere within the pressure vessel and has the coating material lead-out pipe which has been hermetically passed through the lid.

Description

Specification

Moisture-proof insulating paint supply device

Technical field

TECHNICAL FIELD [0001] The present invention relates to a moisture-proof insulating paint supply device, and more particularly to a moisture-proof insulating paint supply device suitable for delivering a paint for moisture-proof insulation of a circuit board in an electric / electronic component. Background art

[0002] A mounting circuit board is mounted on various electric devices, and the mounting circuit board is subjected to insulation treatment for the purpose of protecting it from moisture, dust, gas, and the like. For this insulation treatment, a protective coating treatment with a paint such as acrylic resin or urethane resin is widely employed (Patent Document 1). As coating methods for performing such a protective coating treatment, a dipping method, a brush coating method, a spray method, a drawing coating method, and the like are generally known.

[0003] Recently, electrical devices in recent years tend to be smaller and lighter and multi-functional, and the circuit boards are also mounted with high density in order to cope with the downsizing and higher functionality of the mounted circuit boards. . For the protective coating treatment of such a high-density circuit board, a drawing coating method is preferably used because fine control of the coating location is easy.

[0004] As a method of supplying paint to the above-mentioned drawing application method, there are a method of installing a small paint supply container at the upper part of the paint discharge part, and a large paint supply container at a place away from the paint discharge part. There is a method of feeding paint with a tube after installing. Of these, the method of supplying paint with a large paint supply container is more efficient because the frequency of paint replenishment is reduced.

[0005] As a moisture-proof insulating paint supply device that supplies paint in the large paint supply container, there is a conventional structure shown in FIG.

As shown in FIG. 1, a conventional moisture-proof insulating paint supply device includes a moisture-proof insulating paint supply container 2 filled with a moisture-proof insulating paint 1, a pressure container 3 that houses the supply container 2, A high-pressure gas introduction pipe 5 for introducing a chemically inert high-pressure gas 4 such as air or nitrogen gas into the pressure vessel 3 and the pressure vessel 3 are hermetically penetrated, and the paint in the supply vessel 2 1 It consists of a paint outlet pipe 6 with a tip inserted inside! The supply container 2 is a glass bottle, a metal can, a container made of synthetic resin such as polyethylene or polypropylene, and the like. In other words, it is formed thick so as not to be easily deformed. A lid (not shown) is screwed into the opening of the supply container 2 and is sealed by the lid during storage, thereby preventing the moisture-proof insulating paint 1 of the contents from deteriorating. The pressure vessel 3 is an openable and closeable sealed vessel made of metal such as stainless steel, and is a simple pressure vessel that can withstand a relatively light internal pressure of about OMPa. The high-pressure gas introduction pipe 5 is a tube made of metal or synthetic resin, and airtightly penetrates the upper wall of the pressure vessel 3, and the high-pressure gas of about 0.3 MPa is inserted into the pressure vessel 3. Is introduced. The paint outlet pipe 6 is a tube made of a metal such as stainless steel or a synthetic resin such as polytetrafluoroethylene, and airtightly penetrates the upper wall of the pressure vessel 3, and the tip thereof is the supply vessel 2. It is located near the bottom of the inside.

[0007] In supplying the moisture-proof insulating paint 1, the supply container 2 is housed in the pressure container 3, the lid of the supply container 2 is removed, and the paint outlet pipe 6 is inserted into the container 2, A high pressure gas 4 is introduced into the container 3 through an introduction pipe 5. The lid of the supply container 2 is removed, and the pressure in the supply container 2 and the pressure in the pressure container 3 become common, so if the pressure in the pressure container 3 becomes higher than atmospheric pressure, The pressure is applied to the paint 1, and the paint 1 is sent through the paint outlet pipe 6 toward the application work place (not shown).

[0008] Patent Document 1: Japanese Patent Laid-Open No. 08-048938

Disclosure of the invention

Problems to be solved by the invention

In the conventional moisture-proof insulating paint supply apparatus as shown in FIG. 1, it has been found that there is a problem to be solved when the moisture-proof insulating paint is a specific paint. If the moisture-proof insulating paint is a solvent-type paint, especially a paint in which acrylic resin, urethane resin, etc. are dissolved and diluted with a solvent, the moisture-proof insulating paint supply device is used to supply the paint. If it is applied to this part, the paint will foam after application. Foaming of the paint after application is not preferable because it only deteriorates the appearance and also reduces the reliability of electrical and electronic parts to be protected.

[0010] The present invention solves the above-described problems of the prior art, and prevents moisture from being lost in highly reliable electrical and electronic parts that do not cause foaming even when a paint dissolved or diluted with a solvent is used. It is an object of the present invention to provide a supply container and a supply device for a moisture-proof insulating paint capable of performing edge processing.

Means for solving the problem

[0011] The present inventors have repeated experiments and studies to elucidate the cause of the problem in the moisture-proof insulating paint supply device of FIG. 1, that is, the problem that foaming occurs in the paint after coating. As a result, the high-pressure gas 4 introduced into the pressure vessel 3 comes into contact with the paint 1, dissolves in a small amount in the solvent in the paint 1, and the high-pressure gas 4 dissolved in this solvent requires the insulation treatment of the paint 1. It was confirmed that the foaming phenomenon force S was generated in order to separate it as a gas in the paint over time after it was applied to the site.

[0012] Therefore, the present inventors have conducted further experiments and studies to solve the above-mentioned problems, and have obtained the following knowledge. That is, as a supply container, a high pressure of about 0. OlMPa is used, and a flexible container easily deformed by atmospheric pressure is used, and a high pressure gas is introduced into the pressure container by inserting a paint outlet pipe in an airtight manner. The contact between the gas and the moisture-proof insulating paint can be cut off, and at the same time, the moisture-proof insulating paint can be derived, and the moisture and moisture-proof insulating paint supply device is used to supply and apply to the target location. It has been found that bubbles do not occur in the paint over time.

[0013] The present invention has been made on the basis of force and knowledge. That is, the moisture-proof insulating paint supply device according to the present invention includes a moisture-proof insulating paint supply container filled with a moisture-proof insulating paint, a pressure container that houses the supply container, and a high-pressure gas introduced into the pressure container. Moisture-proof insulating paint supply comprising a high-pressure gas inlet pipe for sealing and a paint lead-out pipe penetrating the pressure vessel in an airtight manner and inserting a tip into the coating material in the supply vessel The supply container is composed of a flexible container that can be deformed by pressurizing the atmosphere, the container is blocked from the atmosphere in the pressure container by a lid, and the lid is configured to connect the paint outlet pipe. It is characterized by being airtightly penetrated.

[0014] The operating atmospheric pressure in the high-pressure vessel is preferably 0.01 MPa to 3. OMPa, and the supply vessel can be easily deformed by the atmospheric pressure.

[0015] A base part may be formed in the supply container, and the lid may be airtightly fitted to the base part. The paint lead-out pipe is composed of a first paint lead-out pipe fixed to the pressure vessel and a second paint lead-out pipe detachably connected to the first paint lead-out pipe. The second paint lead-out tube may be attached to the lid body in an airtight manner.

[0017] The deformable body of the supply container is composed of at least one selected from the group consisting of polyolefin resin, acrylic resin, fluororesin, polyamide resin, polyester resin, silicone resin, and metal foil! / But! /

[0018] The thickness of the deformable main body of the supply container is preferably 10 m to 1 mm from the viewpoint of gas permeability resistance and deformability due to the pressure of the operating atmosphere.

The invention's effect

[0019] The moisture-proof insulating paint supply device of the present invention can install the paint in the pressure vessel together with the supply container, and can supply the paint continuously. Therefore, the replenishment frequency is low and the operation is simple. Since high-pressure gas does not come into direct contact, even when using paint that has been dissolved or diluted with a solvent, the high-pressure gas dissolves in the solvent, preventing foaming in the paint after application. Demonstrate. Therefore, it is possible to provide a highly reliable electrical / electronic component by performing the moisture / insulation treatment of the electrical / electronic component using the moisture-proof insulating paint supply device of the present invention.

Brief Description of Drawings

[0020] FIG. 1 is a schematic configuration diagram of a conventional moisture-proof insulating paint supply device.

FIG. 2 is a schematic configuration diagram of a moisture-proof insulating paint supply device of the present invention.

Explanation of symbols

[0021] 1 Moisture-proof insulating paint

2 Paint supply container

3 Pressure vessel

4 High pressure gas

5 High-pressure gas introduction pipe

6 Paint outlet pipe

6a First paint outlet pipe

6b Second paint outlet tube 10 Paint supply container

10a Container body of paint supply container

10b Base part of paint supply container

11 Lid

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 2 shows a configuration diagram of a moisture-proof insulating paint supply device according to the present invention. In FIG. 2, the same components as those shown in FIG.

[0023] The moisture-proof insulating paint supply device of the present invention is characterized in that the supply container 10 filled with the paint 1 is composed of a flexible container that can be deformed by the atmospheric pressure of the high-pressure gas 4 in the pressure container 3. And that the container 10 is shut off from the atmosphere in the pressure vessel 3 by the lid 11 and that the lid 11 allows the paint outlet pipe 6 to pass through in an airtight manner. .

[0024] A tube having a paint discharge section (not shown) attached to the tip is connected to the delivery tip of the paint outlet tube 6. In the present invention, the paint discharge section is not particularly limited, but a general paint discharge section for drawing application may be used. This consists of a valve for controlling the discharge of paint and a needle for adjusting the discharge amount, and is placed at the optimal discharge position by manual or automatic equipment.

[0025] As described above, the moisture-proof insulating paint supply device of the present invention prevents contact between the pressure container 3, the paint supply container 10 that can be deformed by the atmospheric pressure, and the paint and the atmosphere (high-pressure gas 4). It has a lid 11 that allows the paint to be delivered to the outlet pipe 6 and is held inside the paint supply container 10 by the high-pressure gas 4! /, And pressurizes and feeds the moisture-proof insulating paint 1 be able to. At this time, the high-pressure gas 4 and the moisture-proof insulating paint 1 are blocked by the paint supply container 10 and are not in direct contact with each other.

[0026] The pressure vessel 3 constituting the moisture-proof insulating paint supply device of the present invention has the introduction pipe 5 for the high-pressure gas 4 and the discharge pipe 6 for the paint 1 as described above, and further replaces the paint supply container 10. Therefore, it can be opened and closed. The inside of the pressure vessel 3 is pressurized by the high-pressure gas 4, and the pressure is usually 0.01 MPa to 3. OMPa. In other words, the minimum operating ambient pressure in the pressure vessel 3 is normally 0. OlMPa, and the supply vessel is easy at this atmospheric pressure. Can be transformed into One end of the high-pressure gas 4 introduction pipe 5 is opened in the container, and the other end is connected to a high-pressure gas 4 supply pipe (not shown).

[0027] The paint outlet pipe 6 includes a first paint outlet pipe 6a fixed to the pressure vessel 3, and a second paint outlet pipe detachably connected to the first paint outlet pipe 6a. It is composed of 6b! The second paint outlet pipe 6b is attached to the lid body 11 in an airtight manner.

[0028] The paint supply container 10 includes a container body 10a and a base part 10b, and a handle or the like may be attached to the container body 10a if necessary. When the paint 1 is transported or stored, an airtight cap (not shown) can be fitted to the base part 10b, and the lid (connector) 11 is fitted to the base part 10b during use. The base part 10b can withstand the moisture-proof insulating paint 1 to be used, and the material that does not impair the adhesion to the lid 11 even if the container body 10a is deformed when the paint 1 is pressurized and fed. , And created with strength.

[0029] The container body 10a has sufficient strength and durability to store the moisture-proof insulating paint 1 to be used, and at the same time, quickly deforms when pressurized from the outside, and transmits the pressure to the internal paint. The power to do S. Furthermore, it can be continuously deformed as the paint 1 is delivered so that most of the paint 1 contained therein can be delivered.

[0030] Examples of the material constituting the container body 10a include polyolefin resins such as polyethylene, polypropylene, and polybutadiene, polymethyl (meth) acrylic acid, polyethyl (meth) acrylic acid, polybutyl (meth) acrylic acid, and the like. Acrylic resin, polytetrafluoroethylene, polyethylene tetrafluoroethylene, polyvinylidene fluoride, etc., polyamide, 6, polyamide, 66, polyamide, 12 polyamide, etc., resin, polyethylene terephthalate, polybutylene Examples thereof include polyester resins such as terephthalate, silicone resins such as methylphenylpolysilane, and metal foils such as aluminum foil. These may be used alone, or two or more kinds may be laminated to produce a laminate, and this laminate may be used. In particular, it is preferable to laminate materials having different properties such as strength, chemical resistance, and gas permeation resistance because the overall properties are improved. The optimum thickness of the container body 10a varies depending on these materials. Usually, a thickness of 10 111 to 1111 111, preferably 100 m to 300 m is used. If the container body 10a is too thin, sufficient strength and gas permeation resistance cannot be obtained. It becomes difficult to send paint 1 to the end.

[0031] The lid 11 is used by being fitted to the base part 10b of the supply container 10. As described above, the second paint outlet pipe 6b for delivering the paint 1 passes through the lid 11 in an airtight manner. One end of the second paint outlet pipe 6b is detachably connected to the first paint outlet pipe 6a fixed to the pressure vessel 3, and the tip of the other end opens near the bottom in the supply container 10. ing.

[0032] The moisture-proof insulating paint 1 used in the moisture-proof insulating paint supply apparatus of the present invention is not particularly limited, but is not limited to a paint obtained by dissolving and diluting an acrylic resin, urethane resin or the like with a solvent. The effect of the present invention is remarkable!

[0033] Examples of the electric and electronic parts to which the moisture-proof insulating paint is applied using the moisture-proof insulating paint supply device of the present invention include a microcomputer, a transistor, a capacitor, a resistor, a relay, a transformer, and a mounting circuit board on which these are mounted. In addition, lead wires, wires, lines, film substrates and the like that are joined to these electric and electronic components can also be included. Moreover, the signal input part of flat panel display panels, such as a liquid crystal display panel, a plasma display panel, an organic electoluminescence panel, and a fine red emission display panel, are mentioned.

Example

[0034] Examples of the present invention will be described below, but the examples shown below are only suitable examples for explaining the present invention, and do not limit the present invention. In the examples and comparative examples shown below, “parts” means “parts by weight”.

[0035] (Preparation of moisture-proof insulating paint)

(Paint A)

Methaclinole Fuchinole 130, Methaclinole la Linole 104, Methaclinole 5 and 卜 Noren 150 parts were added to a 1 liter four-necked flask and heated to 90 ° C. while passing nitrogen gas. Polymerization proceeded while dropwise adding a solution in which 116 parts of butyl methacrylate, 100 parts of lauryl methacrylate, 5 parts of methacrylic acid and 3 parts of azobisisobutyronitrile were mixed and dissolved in 2 hours. Thereafter, the temperature was raised to 110 ° C., and the polymerization was completed by keeping the temperature for 2 hours, followed by cooling. When the temperature reached 50 ° C., 200 parts of toluene was added and stirred for 10 minutes to obtain a uniform solution (paint A). [0036] (Paint

G-2000 (Nippon Soda Co., Ltd. trade name, hydroxyl group-containing polybutagen) 281 parts, xylene 280 parts, tolylene diisocyanate 40 parts are mixed and stirred in a 1 liter four-necked flask and reacted at 70 ° C for 3 hours. It was. Thereafter, the synthesis temperature was lowered to 50 ° C., 100 parts of ethyl alcohol was added, and the mixture was reacted at 50 ° C. for 1 hour to obtain paint B.

[0037] (Example 1)

A deformable container with a capacity of ₄ liters consisting of a three-layer film with a base made of polypropylene and laminated with polyamide 66 / polyethylene terephthalate / polyethylene (thickness 15 ^ ΐη / 12μm / 90μm) Ichiken Co., Ltd., trade name “Haji Ibac”) was filled with 3 kg of the paint A, and a lid (connector) having a second paint outlet tube was fitted to the base. This paint supply container is left in a pressure vessel (made of SUS, capacity: 10 liters) in a state in which the contact between the surrounding gas and paint A is cut off, and the second paint lead pipe of the lid and the pressure container The first paint outlet pipe was connected and the pressure vessel was sealed. With the paint outlet pipe of the pressure vessel sealed with a valve, high pressure air with a pressure of 0.3 MPa was introduced from the high pressure gas inlet pipe of the pressure vessel, and the internal paint supply container was pressurized. Initially, 10 grams of paint A was extracted from the paint outlet tube at the pressurization time of 1st, 3rd, 5th and 7th.

[0038] (Example 2)

A deformable container with a capacity of ₄ liters consisting of a three-layer film with a base made of polypropylene and laminated with polyamide 66 / polyethylene terephthalate / polyethylene (thickness 15 ^ ΐη / 12μm / 90μm) Ichiken Co., Ltd., trade name “Haji Ibac”) was filled with 3 kg of the paint B, and a lid (connector) having a second paint outlet pipe was fitted to the base. This paint supply container is left in a pressure vessel (made of SUS, capacity: 10 liters) in a state where contact between the surrounding gas and paint B is cut off, and the second paint outlet pipe of the lid and the pressure container The first paint outlet pipe was connected and the pressure vessel was sealed. With the paint outlet pipe of the pressure vessel sealed with a valve, high pressure air with a pressure of 0.3 MPa was introduced from the high pressure gas inlet tube of the pressure vessel, and the internal paint supply container was pressurized. At the initial time, pressurization time 1 day, 3 days, 5 days and 7 days, 10 grams of paint B was extracted from the paint outlet tube.

[0039] (Comparative Example 1) Fill a polyethylene blow molded container with a capacity of 4 liters and a wall thickness of about 2 mm with 3 g of paint A, leave it in a pressure vessel (SUS, capacity 10 liters), and insert one end of the pipe into the paint A The other end was connected to the paint outlet tube of the pressure vessel. At this time, the inlet of the blow molded container was opened, and the surrounding gas and the paint A were kept in contact with each other. With the paint outlet pipe sealed with a valve, high-pressure air with a pressure of 0.3 MPa was introduced from the high-pressure gas inlet pipe of the pressure vessel and pressurized. In the initial stage, pressurization time 1 day, 3 days, 5 days, and 7 days, the paint outlet pipe force was also extracted 10 grams of paint A each.

[0040] (Comparative Example 2)

Fill a polyethylene blow molded container with a capacity of 4 liters and a wall thickness of about 2 mm with 3 g of paint B, leave it in a pressure vessel (SUS, capacity 10 liters), and insert one end of the pipe into paint B The other end was connected to the paint outlet tube of the pressure vessel. At this time, the inlet of the blow molded container was opened, and the surrounding gas and paint B were kept in contact with each other. With the paint outlet section sealed with a valve, high pressure air with a pressure of 0.3 MPa was introduced from the high pressure gas inlet tube of the pressure vessel and pressurized. At the initial time, pressurization time 1 day, 3 days, 5 days, and 7 days, 10 grams of paint discharge pipe force and paint B were extracted.

[0041] (Evaluation)

Each extracted paint sample was immediately poured gently into a tin metal shell with a diameter of 60 mm and a height of 10 mm without foaming, and spread evenly. The sample was left as it was for 15 minutes. The case where no bubbles were generated was marked with ◯, the case of 1-20 pieces was marked with △, and the case of more than 21 was marked with X. The results are shown below (Table 1).

[0042] [Table 1]

(table 1)

[0043] As is apparent from Table 1 above, when the coating material is supplied using the moisture-proof insulating coating material supply apparatus according to the present invention, a high-quality coating film in which bubbles are not generated in the cured coating material can be obtained. Industrial applicability

[0044] As described above, according to the moisture-proof insulating paint supply device according to the present invention, the paint can be installed together with its supply container, and the paint can be continuously supplied. Therefore, the replenishment frequency is low and the operation is simple. However, since the paint and the high-pressure gas do not come into direct contact with each other, it is possible to form a high-quality insulating coating without foaming the paint even when the paint is dissolved or diluted with a solvent. Therefore, if the moisture-proof insulation treatment of the electrical / electronic component is performed using the moisture-proof insulating paint supply device of the present invention, a highly reliable electrical / electronic component can be provided.

Claims

The scope of the claims

[1] A moisture-proof insulating paint supply container filled with moisture-proof insulating paint, a pressure container for housing the supply container, a high-pressure gas introduction pipe for introducing high-pressure gas into the pressure container, and the pressure A moisture-proof and insulating paint supply device having a paint outlet pipe penetrating the container in an airtight manner and having a tip inserted into the paint in the supply container;

The supply container is composed of a flexible container that can be deformed by the atmospheric pressure of the high-pressure gas in the pressure container, the container is shut off from the atmosphere in the pressure container by a lid, and the lid is the paint A moisture-proof insulating paint supply device characterized in that the lead-out pipe is airtightly penetrated.

[2] The moisture-proof insulating paint supply device according to claim 1, wherein an operating atmospheric pressure in the high-pressure vessel is 0.01 MPa to 3. OMPa.

[3] A base part is formed in the supply container, and the lid body is airtightly fitted to the base part.

The moisture-proof insulating paint supply device according to claim 1, wherein V is V.

[4] The paint lead-out pipe is composed of a first paint lead-out pipe fixed to the pressure vessel, and a second paint lead-out pipe detachably connected to the first paint lead-out pipe, 2. The moisture-proof insulating paint supply device according to claim 1, wherein the second paint lead-out pipe is attached to the lid body in an airtight manner.

[5] The deformable main body of the supply container is a polyolefin resin, an acrylic resin, a fluororesin

2. The moisture-proof insulating paint supply device according to claim 1, wherein the moisture-proof insulating paint supply device is composed of at least one selected from the group consisting of: a polyamide resin, a polyester resin, a silicone resin, and a metal foil.

6. The moisture-proof insulating paint supply device according to claim 5, wherein the deformable main body of the supply container has a thickness of 10 μm to 1 mm.