Method of making a coated article and method of damping a substrate

Abstract

To provide a method capable of applying a damping material containing rubber, for example, regardless of the surface shape of an object article or a base material.SOLUTION: For example, a method of making an at least partially coated article comprising applying a liquid damping material comprising an organic solvent and a rubber to a surface of an article by spraying, brushing, dispensing, or dipping; or a method of damping a substrate comprising applying a liquid damping material comprising an organic solvent and a rubber to a surface of a substrate by spraying, brushing, dispensing, or dipping.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for producing a coated article and a method for damping a substrate. [Background technology]

[0002] Vibration of the item may cause deterioration or destruction of the item and may also result in noise or heat generation. Since it can be a cause of aging, reducing it is considered important in various fields. Rubber has the excellent ability to convert vibrations into thermal energy, making it a popular material for vibration damping. For example, as described in Patent Document 1, By attaching the vibration sheet to the surface of an item, the vibration of the item can be suppressed.

[0003] Vibration-damping sheets containing rubber are extremely effective because they can dampen vibrations simply by being attached to the object. While it is easy to use, it is limited to relatively flat surfaces. The eAxle (also written as "e-Axle") is considered to be the heart of electric vehicles. In this document, it is referred to as "eAxle." High frequency noise is seen as a problem, and it is desirable to suppress vibration in some way. Due to the surface shape with many convexities, the parts and areas to which the vibration damping sheet can be applied are limited. It is target. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-181155 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention is applicable to, for example, rubber-containing control materials, regardless of the surface shape of the target article or substrate. It provides a novel method by which vibration materials can be applied. [Means for solving the problem]

[0006] The manufacturing method of the present invention is, for example, to spray or brush a liquid vibration damping material containing an organic solvent and rubber. The method includes applying the composition to the surface of the article by painting, dispensing, or dipping.

[0007] The vibration-damping method of the present invention also includes, for example, spraying a liquid vibration-damping material containing an organic solvent and rubber. The method includes applying the composition to the surface of the substrate by brushing, using a dispenser, or dipping. do. [Effects of the Invention]

[0008] According to the present invention, for example, rubber can be applied to the surface of an article or substrate regardless of its surface shape. A method is provided for applying a vibration-damping material comprising: [Brief explanation of the drawings]

[0009] [Figure 1] 3A to 3C are diagrams illustrating an example of a process for applying a damping material to an article in the first embodiment. [Figure 2] FIG. 2 is a diagram further illustrating FIG. 1. [Figure 3] 10A to 10C are schematic diagrams showing an example of a process for applying a damping material to an article in the second embodiment. [Figure 4] 10A to 10C are diagrams illustrating an example of a process for applying a damping material to an article in the third embodiment. [Figure 5] 10 is a flowchart illustrating an example of a procedure for carrying out the method according to each embodiment. [Figure 6] 10 is a graph showing the influence of film thickness on vibration damping effect. [Figure 7] 10 is a graph showing the influence of the content of adhesive components on vibration damping effect.

[0010] Exemplary embodiments of the present invention are listed below. [1] A method for producing an at least partially coated article, comprising: Liquid damping materials containing organic solvents and rubber are sprayed, brushed, dispensed, or applied by de- applying the composition to the surface of the article by tipping. [2] A method for damping vibration of a substrate, comprising: Liquid damping materials containing organic solvents and rubber are sprayed, brushed, dispensed, or applied by de- applying the composition to the surface of the substrate by tipping. [3] In the above process, the film thickness is 0.5 mm or more by one application. [1] Also is the method described in [2]. [4] Any of [1] to [3], wherein the surface is degreased and / or cleaned before the step. The method according to any one of the preceding claims. [5] The method according to any one of [1] to [4], wherein the step is carried out using a pressure-feed spray gun. How to do it. [6] Viscosity of the damping material at 23°C (using a B-type rotational viscometer at a rotation speed of 6r The viscosity of the polymer (measured as a function of the viscosity in pm) is 1,500 mPa·s or more, and any of [1] to [5] The method according to any one of the preceding claims. [7] The vibration-damping material according to any one of [1] to [6], wherein the solid content concentration of the vibration-damping material is 10% by mass or more. How to post. [8] Any of [1] to [7], wherein the rubber is butyl rubber or halogenated butyl rubber. The method according to any one of the preceding claims. [9] The method according to any one of [1] to [8], wherein the vibration-damping material further contains an adhesive component.

[10] The method according to any one of [1] to [9], wherein the vibration-damping material further contains a filler. .

[0011] The method according to the present invention comprises spraying, brushing, or applying a liquid vibration-damping material containing an organic solvent and rubber. A process of applying the coating to the surface of an article or substrate by a dispenser or dipping (hereinafter Hereinafter, the first to third embodiments will be described. The coating process in the embodiments will be explained in order, and the matters common to all the embodiments (vibration damping Details of the materials and other processes will be discussed later.

[0012] [First embodiment] First, the method according to the first embodiment will be described in detail with reference to FIGS. 1 and 2. FIG. 1 shows a process for applying a damping material 1 to a surface 11 of an article 10 in this embodiment. 2 is a diagram showing an example of a process for producing a semiconductor device according to the present invention.

[0013] In this embodiment, a liquid damping material 1 is sprayed using a pressure-feed spray gun (spray gun 2). By spraying, the damping material 1 is applied to the surface 11 of the article 10. The liquid to be applied is stored in a tank or container, and the container is pressurized with air. The spray gun is a type that supplies the liquid to the spray gun. The product 10 is an eAxle unit and has a surface 11 with a concave and convex shape. The LE unit is a drive unit for electric vehicles, etc., and consists of a motor, inverter, and deceleration The machine is integrated.

[0014] As shown in FIG. 1, the spray gun 2 includes a body 21, a trigger 22, a paint nipple 23, an air Air nipple 24, air volume adjustment knob 25, discharge volume adjustment knob 26, pattern adjustment knob 2 7, and a nozzle 28. The air hose 5 is connected to the air nipple 24, and the liquid hose The spray gun 2 is connected to the air hose 5 and the liquid hose 6 of the spray gun 2. The spray gun 2 is connected to the container 3 via the nozzle 6. For example, the container 3 may not be connected to the air hose 5. The compressor 4 is connected to the power supply 8 (see Figure 2) via the It uses power supplied by the The air compressed in the compressor 4 is sent through the air hose 7 to the container. 3, pressurizing the internal space of the container 3 (air 9a in FIG. 2).

[0015] When the trigger 22 of the spray gun 2 is pulled, the vibration damping material 1 is supplied to the spray gun 2 via the liquid hose 6. The compressed air is then introduced into the spray gun 2 via an air hose 5. The air (air 9b in FIG. 2) comes into contact with the damping material 1 inside the spray gun 2, The air is sprayed from the nozzle 28 together with the material 1. At this time, the amount of sprayed air is adjusted by the air amount adjusting knob. The amount of the damping material 1 is adjusted by adjusting the length of the approximately elliptical injection pattern by adjusting the discharge amount adjusting knob 26. The diameter can be changed using the pattern adjustment knob 27.

[0016] The sprayed mist or droplet-like vibration damping material 1 is applied to at least the surface 11 of the target article 10. When the organic solvent in the coating film evaporates, the coating film changes to the shape of the surface 11. This creates a rubber sheet that conforms to the shape of the surface, and exerts a vibration-damping effect. A coated article is produced.

[0017] According to the method of this embodiment, even on the surface 11 having an uneven shape, Naturally, the article 10 to be coated is eAxl. The present invention is not limited to the e-unit, but may be applied to any item for which vibration suppression is required. For example, , the article 10 is an automobile, a railway vehicle, a household electrical appliance, an office appliance, a housing facility or a machine tool. The object may be any of various parts used in the fields of machinery, etc. Regardless of the surface shape of the rubber-containing damping material 1, the method can be suitably used for articles having an uneven surface or a curved surface.

[0018] Even if a portion of the surface 11 of the article 10 is coated by the method according to the present embodiment, The entire surface 11 of the article 10 may be coated. This method is particularly effective when the surface is uneven or curved. It may be applied to a flat surface.

[0019] The surface 11 of the article 10 that is subjected to the coating process may be made of any material. For example, the portion of the surface 11 of the article 10 that is subjected to the coating process may be made of a pure metal. Alternatively, it may be formed of a metal material such as an alloy, a metal oxide, a ceramic, or It may be made of a non-metallic inorganic material such as glass, or may be made of a polymer material such as resin. It may be done.

[0020] The method according to this embodiment also has an aspect of being a method for damping vibrations of a substrate. The substrate to which this method is applied is a substrate used in an article that requires vibration suppression, or For example, the substrate may be a substrate that constitutes a part of an article such as an automobile, a railway vehicle, Various parts used in fields such as home appliances, office equipment, housing facilities, and machine tools The substrate may be a substrate provided in the device or a substrate used in the production of the device. Therefore, the present method can suppress vibrations regardless of the surface shape of the target substrate. It can be suitably used for substrates having an uneven surface or a curved surface.

[0021] By the method according to this embodiment, a part of the substrate may be damped, or the entire substrate may be damped. The method may be used for substrates with complex shapes, particularly those with uneven or curved surfaces. Of course, this method is not applicable to flat substrates. The substrate to be subjected to this method may be made of any material. For example, the substrate may be made of a metallic material such as a pure metal or an alloy, or may be made of a metal oxide. The substrate may be made of a non-metallic inorganic material such as an oxide, ceramic, or glass, and may be made of a resin. The insulating film may be formed from a polymer material such as

[0022] As will be described later, from the viewpoint of productivity, it is preferable to obtain a thick coating film by applying the vibration-damping material 1 once. In this specification, the term "one-time application" does not mean so-called "multiple application." Not "one coat" i.e., multiple coats with active drying steps in between The film thickness refers to the film thickness after drying (after the organic solvent has evaporated).

[0023] In order to obtain a thick coating film by one application, it is preferable to use a vibration-damping material 1 having a high viscosity. According to the method of this embodiment, the coating step is carried out using a pressure-feed spray gun. For example, the viscosity at 23°C (using a B-type rotational viscometer and rotating in a No. 1 rotor) High viscosity control (viscosity at 6 rpm) is 1,500 mPa·s or more. Even when the vibration-damping material 1 is used, the vibration-damping material 1 can be applied to the surface 11 of the article 10 without any problems. This makes it possible to achieve a film thickness of, for example, 0.5 mm or more with a single application. This allows for the formation of a coating film of the desired thickness in a short time, dramatically improving productivity. .

[0024] [Second embodiment] Next, the method according to the second embodiment will be described in detail with reference to FIG. FIG. 3 shows an example of a process for applying the vibration-damping material 1 to the surface 11 of the article 10 in this embodiment. FIG.

[0025] In this embodiment, a gravity spray gun (spray gun 20) is used to spray the liquid damping material 1. The damping material 1 is applied to the surface 11 of the article 10 by spraying the damping material 1 onto the surface 11. As shown in FIG. The spray gun 20 is provided with a cup 30 that contains the liquid damping material 1. 20 is connected to the compressor 4 via an air hose (not shown). The compressor 4 is connected to a power source 8. The air compressed in the compressor 4 is supplied to an air hose The air is introduced into the spray gun 20 through the nozzle (air 90 in FIG. 3). Internally, air 90 is introduced into the interior of the spray gun 20 by gravity from the cup 30. The air comes into contact with the damping material 1 and is then sprayed from the nozzle together with the damping material 1 .

[0026] The sprayed mist or droplet-like vibration damping material 1 is applied to at least the surface 11 of the target article 10. When the organic solvent in the coating film evaporates, the coating film changes to the shape of the surface 11. This creates a rubber sheet that conforms to the shape of the surface, and exerts a vibration-damping effect. A coated article is produced.

[0027] According to the method of this embodiment, as with the method of the first embodiment, the uneven shape The vibration-damping material containing rubber can be easily applied to the surface 11 having the above-mentioned structure. The article 10 is the same as that described in the first embodiment. The method according to this embodiment is a method for damping vibrations of a substrate, similar to the method according to the first embodiment. In this case, the substrate to be treated is the same as that described in the first embodiment. It is the same as what was mentioned above.

[0028] The method according to this embodiment requires simpler equipment than the method using a pressure-feed spray gun. Therefore, it is particularly suitable for applications where multiple coatings are acceptable or where a thick coating is not required. In this case, it is advantageous to use a damping material 1 having a relatively low viscosity.

[0029] [Third embodiment] Next, the method according to the third embodiment will be described in detail with reference to FIG. 4 shows an example of a process for applying the vibration-damping material 1 to the surface 11 of the article 10 in this embodiment. FIG.

[0030] In this embodiment, a brush 101 is used to apply the liquid damping material 1 to the surface 11 of the article 10. As shown in FIG. 4, the worker P applies the vibration-damping material 1 contained in the container 102 with a brush. After the brush 101 is attached to the surface 11 of the article 10, the brush 101 is brought into contact with the surface 11 of the article 10. The vibration material 1 adheres to at least a part of the surface 11 of the target article 10, forming a coating film. When the organic solvent in the film volatilizes, the coating film becomes a rubber sheet that conforms to the shape of the surface 11, and performs vibration damping. In this way, an article having at least a portion coated thereon is produced. .

[0031] According to the method of this embodiment, as with the method of the first embodiment, the uneven shape The vibration-damping material containing rubber can be easily applied to the surface 11 having the above-mentioned structure. The article 10 is the same as that described in the first embodiment. The method according to this embodiment is a method for damping vibrations of a substrate, similar to the method according to the first embodiment. In this case, the substrate to be treated is the same as that described in the first embodiment. It is the same as what was mentioned above.

[0032] According to the method of this embodiment, the equipment is extremely simplified and, for example, Viscosity (using a B-type rotational viscometer with a No. 1 rotor at 6 rpm) When using a high viscosity damping material1 with a viscosity of 1,500 mPa·s or more, In this case, the vibration-damping material 1 can be applied to the surface 11 of the article 10 without any problems. It is possible to obtain a film thickness of, for example, 0.5 mm or more by applying the coating once. This is particularly useful in applications where automation is less of a requirement.

[0033] [Other embodiments] The coating step in the method of the present invention has been described above with reference to preferred embodiments. However, the application process is not limited to the above embodiment. In the case of low viscosity, it may be applied using a spray can. The application may be carried out by immersion or by dipping.

[0034] [Common matters] Next, in addition to the above embodiment, there are some points common to all embodiments of the present invention. We will explain about this.

[0035] The damping material used in the coating process contains an organic solvent and rubber, and is in a liquid state. The components contained in the vibration-damping material will be explained in detail below.

[0036] (organic solvent) The vibration-damping material contains an organic solvent, which dissolves or dissolves part or all of the rubber used. There is no particular limitation as long as the organic solvent is dispersible. Examples of the organic solvent include hexane, toluene, and the like. Among these, the solubility of rubber and From the viewpoint of complying with environmental regulations, it is preferable to use hexane as the organic solvent.

[0037] The content of the organic solvent in the vibration-damping material is not particularly limited. The viscosity of the damping material at 23°C (at 60 rpm using a B-type rotational viscometer) is, for example, 3 mPa. Amount to obtain a value of 10 mPa·s to 900 mPa·s. a·s, more preferably 50mPa·s to 800mPa·s Amount, more preferably an amount of 100 mPa·s to 600 mPa·s, particularly preferably The amount may be adjusted to 200 mPa·s to 300 mPa·s. The content of is measured by the viscosity of the damping material before application (23°C, B-type rotational viscometer, rotation speed 30 rpm) ) is, for example, 10 mPa·s to 2,000 mPa·s, preferably 20 m Pa·s to 1,800 mPa·s, more preferably 100 mPa·s to 1 , 600 mPa·s, more preferably 200 mPa·s to 1,200 mPa·s Pa·s, and particularly preferably 400 mPa·s to 600 mPa·s The content of the organic solvent may be determined based on the viscosity of the damping material before application (at 23°C). , B-type rotational viscometer, rotation speed 12 rpm) is, for example, 20 mPa·s to 4,000 mPa·s s, preferably 40 mPa s to 3,500 mPa s, More preferably, the viscosity is 200 mPa·s to 3,000 mPa·s, and even more preferably The amount is preferably 400 mPa·s to 2,000 mPa·s, and more preferably 800 mPa·s. The amount of the organic solvent may be adjusted to a value between 1,200 mPa·s and 1,200 mPa·s. The viscosity of the damping material before application (23°C, B-type rotational viscometer, rotation speed 6 rpm) is, for example, The amount is preferably 100 mPa·s to 10,000 mPa·s, and more preferably 200 mPa·s. s to 6,000 mPa·s, more preferably 500 mPa·s to 5,0 00mPa·s, more preferably 1,000mPa·s to 4,000mPa·s Pa·s, particularly preferably 1,500 mPa·s to 3,000 mPa·s The viscosity of the damping material at 23°C must be within an appropriate range. Appropriate film thickness that can easily achieve vibration damping effects with fewer applications or shorter application times In particular, the viscosity of the damping material at 23°C (measured using a B-type rotational viscometer) If the viscosity at 6 rpm is 1,500 mPa·s or more, it will As mentioned above, "one-time application" means , not so-called "multi-coating," i.e., multiple coats with active drying phases in between. This means that it is not an application of

[0038] The content of the organic solvent is, for example, 10% by mass to 60% by mass of the solid content of the vibration damping material. Preferably, it is 15% by mass to 50% by mass, more preferably, it is 25% by mass to 45% by mass, and particularly preferably Alternatively, the solid content may be 30% by mass to 40% by mass. This refers to the rubber contained in the damping material and the filler (if any) described below. By setting the concentration within an appropriate range, it becomes easier to obtain a desired viscosity. When the content is 30% by mass or more, a sufficient film thickness can be easily obtained by one coating.

[0039] (rubber) The vibration damping material includes rubber. In this specification, rubber means natural rubber or synthetic rubber. The rubber is preferably a synthetic rubber. Typically, the rubber is unvulcanized.

[0040] Examples of synthetic rubber include butyl rubber, halogenated butyl rubber, isoprene rubber, Butadiene rubber, styrene butadiene rubber, chloroprene rubber, nitrile rubber, polyisobutene Examples include ethylene, ethylene propylene rubber, norbornene rubber, acrylic rubber, and fluororubber. Among them, butyl rubber, halogenated butyl rubber, and chlorobutyl rubber are preferred from the viewpoint of excellent vibration damping properties. From the group consisting of propylene rubber, nitrile rubber, ethylene propylene rubber, and norbornene rubber At least one synthetic rubber selected from the group consisting of butyl rubber and halogenated butyl rubber is preferred. Halogenated butyl rubber is a rubber containing chlorine atoms and bromine atoms. It is a compound in which halogen atoms such as butyl groups are introduced, making butyl rubber excellent in heat resistance. The halogen content in the halogenated butyl rubber is not particularly limited, but for example, The halogenated butyl rubber may be, for example, 0.0% by mass to 2.5% by mass. Commercially available chlorinated chlorine compounds such as CIIR 1066 and BIIR 2244 manufactured by ENEOS Materials Co., Ltd. Butyl rubber or brominated butyl rubber may also be used.

[0041] In one embodiment of this method, the rubber is not a thermoplastic elastomer. In an embodiment, the rubber is not a polystyrene-based thermoplastic elastomer. In one embodiment, the rubber is not an olefinic thermoplastic elastomer. In one embodiment, the rubber is not a polyvinyl chloride-based thermoplastic elastomer. In one embodiment of the method, the rubber is not a polyurethane-based thermoplastic elastomer. In one embodiment of the method, the rubber is not a polyester-based thermoplastic elastomer. In one embodiment of the method, the rubber is not a polyamide-based thermoplastic elastomer. In one embodiment of the method, the rubber has no units derived from polyisocyanates. In one embodiment of the method, the damping material does not include an epoxy resin. In one embodiment, the damping material does not include a polyurethane resin. The damping material does not include polyvinyl halide resin. In one embodiment of the method, the damping material is free of polyester resin. Does not contain mido resin.

[0042] (adhesive component) The vibration-damping material may further contain an adhesive component. The adhesive component is a material that adheres the rubber to the surface of the article. There are no particular limitations on the adhesive component as long as it is a component that enhances adhesion to the surface. A coupling agent can be used.

[0043] Examples of the silane coupling agent include a silane coupling agent containing a vinyl group, Silane coupling agents containing amino groups or silane coupling agents containing epoxy groups Examples of vinyl silane coupling agents containing a vinyl group include: , vinyltrimethoxysilane, vinyltriethoxysilane, p-styryltrimethoxysilane Examples of amino group-containing aminosilane coupling agents include: , N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilane, N-2-( N-2-(aminoethyl)-3-aminopropyltrimethoxysilane 3-Aminopropyltriethoxysilane, 3-Aminopropyltrimethoxysilane, 3- Aminopropyltriethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane Examples of epoxy silane coupling agents containing epoxy groups include: For example, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyl Diethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropyltriethoxysilane Propylmethyldimethoxysilane, 3-glycidoxypropylethyldiethoxysilane, 2 -(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

[0044] As a silane coupling agent, KBM-903 (3-aminopropyl) manufactured by Shin-Etsu Chemical Co., Ltd. propyltriethoxysilane), KBM-403 (3-glycidoxypropyltriethoxysilane) commercially available silane coupling agents such as KBM-1003 (vinyltrimethoxysilane) and KBM-1003 (vinyltrimethoxysilane) A binder may also be used.

[0045] The content of the adhesive component in the vibration-damping material is not particularly limited. The amount is, for example, 0.1 to 15 parts by mass per 100 parts by mass of the solid content contained in the vibration-damping material. The content of the adhesive component in the vibration-damping material is 10 times the solid content of the vibration-damping material. It is preferable that the amount of the solids contained in the vibration-damping material is 0.2 to 12 parts by mass relative to 0 parts by mass. It is more preferable that the amount is 0.5 to 10 parts by mass per 100 parts by mass of the vibration-damping material. It is more preferable that the content is 1 part by mass to 8 parts by mass per 100 parts by mass of the solid content contained in It is particularly preferred that the amount of the compound is 1.5 to 6 parts by mass relative to 100 parts by mass of the solid content contained in the vibration-damping material. It is particularly preferable that the amount of the compound is 2 to 5 parts by mass relative to 100 parts by mass of the solid content contained in the vibration-damping material. The vibration damping effect of rubber is exerted in the interior of the rubber, at the interface between the rubber and the filler, and The friction generated at the interface between the rubber and the surface of the object converts kinetic energy into thermal energy. Therefore, the content of adhesive components in the vibration damping material is appropriate. The lower the degree, the easier it is for friction to occur at the interface, making it easier to achieve high vibration damping performance. Furthermore, simply from the viewpoint of vibration-damping performance, the vibration-damping material does not need to contain an adhesive component.

[0046] (filler) The vibration-damping material may further contain a filler. The friction at the interface between the rubber and the filler converts kinetic energy into thermal energy. The type of filler is not particularly limited. For example, granular fillers are available. Examples of fillers include needle-shaped fillers, layer-shaped fillers, and plate-shaped fillers.

[0047] Examples of granular fillers include carbon black. Examples of the layered filler include wollastonite. Examples of the layered filler include Graphite, montmorillonite, nontronite, beidellite, bentonite, bar Examples of the filler include miculite, mica, calcined clay, and talc. Examples of suitable inorganic fillers include kaolin, silica, alumina, boehmite, graphite, and talc. can be done.

[0048] The content of the filler in the vibration-damping material is not particularly limited. The amount is, for example, 50 to 500 parts by mass per 100 parts by mass of rubber contained in the vibration-damping material. It may be 60 parts by mass to 300 parts by mass, or 70 parts by mass to 200 parts by mass. Alternatively, the amount may be 80 parts by mass to 150 parts by mass.

[0049] (Other ingredients) Other components of the vibration damping material include rubber reinforcement, antioxidant, processing aid, foaming agent, and foaming aid. In addition, various known additives such as colorants, dispersants, flame retardants, tackifiers, and release agents can be used in the present invention. It may be contained as appropriate within a range that does not impair the properties.

[0050] The applied vibration-damping material is typically exposed on the surface of the article or substrate to provide vibration-damping performance. Therefore, in one embodiment of the method, the damping material is In one embodiment of the method, after the application step: No other layer is placed on the applied vibration-damping material, and no other article, part, component, or substrate is attached. Furthermore, in one embodiment of the method, the article produced is It is not a bundle layer damper.

[0051] In the coating process, the film thickness may be 0.5 mm to 3 mm, and 0.6 mm to 2.5 mm It may be 0.7mm to 2.2mm, or 0.8mm to 2mm. The thickness may be 0.9 mm to 1.8 mm, or 1 mm to 1.5 mm. By keeping the thickness within this range, it becomes easier to obtain vibration damping effects. It is the film thickness after drying. Also, the above film thickness may be obtained by one coating. In this case, productivity is significantly improved. To obtain the above coating film, a high viscosity damping material 1 is used and applied with a pressure-feed spray gun or brush. It is preferable to carry out the coating step by a method such as a roller.

[0052] (Other processes) In the method for manufacturing an article or a method for damping vibration of a substrate according to the present invention, the article or The surface of the substrate may be degreased and / or cleaned. The manufacturing method or the vibration damping method for the substrate is shown in the flowchart of FIG. 5, which includes a degreasing step S1 Alternatively, the cleaning step S2, the coating step S3, and the drying step S4 may be performed in this order.

[0053] ·Degreasing process The surface of the item may be exposed to oils such as lubricating oil, cutting oil, grinding oil, press oil, heat treatment oil, rust preventative oil, and hand grease. There may be grease on the surface. If grease is present, the damping material may not be able to This may result in poor adhesion, which may have a negative impact on the vibration damping effect, or the coating may peel off easily. The degreasing step S1 removes at least a part of the oil and grease adhering to the surface, and the oil and grease adhering to the surface are removed in the subsequent steps. This is done to improve the adhesion of the vibration-damping material.

[0054] The degreasing method may be either a physical method or a chemical method. As a physical method, for example, a wet blasting method, a high pressure liquid injection method, etc. may be used. Examples of the chemical method include solvent degreasing, Examples of degreasing methods include emulsion degreasing, alkaline degreasing, and electrolytic degreasing. The fat may be applied by spraying, immersion, or other methods. Among the degreasing methods listed above, several methods may be performed sequentially, and several methods may be performed simultaneously. The laws may be combined.

[0055] Cleaning process The cleaning step S2 is performed by, for example, removing the degreasing components, dust, and other substances remaining in the degreasing step S1. Washing is carried out to remove other impurities. Washing may be carried out using water or an organic solvent. The cleaning step S2 may be carried out using a cleaning solution other than the cleaning solution. It may be carried out after the greasing step S1, or may be carried out simultaneously with the degreasing step S1. In this case, the degreasing step S1 and the cleaning step S2 are carried out in one step. may be regarded as having been

[0056] ·Coating process The coating step S3 involves coating the surface of an article or substrate with a liquid damping material containing an organic solvent and rubber. The details of this step are as described above.

[0057] ·Drying process The drying step S4 is a step of volatilizing the organic solvent of the vibration-damping material applied in the application step S3. The drying may be carried out under normal pressure or under reduced pressure. Drying may be carried out in a room temperature environment or in a high temperature environment.

[0058] Although the embodiment of the present invention has been described above by way of example, the present invention is not limited to the above-described embodiment. and any embodiment falling within the scope of the inventive concept and claims. and various modifications can be made within the scope of the present invention. [Example]

[0059] The present invention will be described in more detail below with reference to examples. is not limited in any way by

[0060] (Ingredients of vibration-damping material) In each example, the details of the components used to prepare the vibration-damping material are as follows: Rubber: Brominated butyl rubber (ENEOS Materials BIIR 2244) Organic solvent: hexane Adhesive component: Silane coupling agent (KBM-903 manufactured by Shin-Etsu Chemical Co., Ltd.) Filler: Mica (Yamaguchi Mica A-11)

[0061] (Differences depending on application method) Liquid vibration-damping material A (40 g of rubber, 40 g of filler, organic solvent) with a solid content of 20 mass% The liquid damping material B (rubber 90g, filler 330g) with a solid content of 35% by mass was 90 g of ethanol and 330 g of organic solvent were prepared. In the method using the Regan, it was possible to apply damping material A, but the damping material A had a higher viscosity. On the other hand, the method according to the first embodiment (pressure-feed spray gun) In the method according to the third embodiment (method using a brush), Material B was also able to be applied without any problems.

[0062] The various conditions when using a pressure-feed spray gun are as follows: Spray gun: Anest Iwata WIDER2-12G2P Pressurized container: PC-18D manufactured by Anest Iwata Corporation Compressor pressure: 0.3MPa Pressure inside the pressurized container: 0.1 MPa Discharge volume adjustment knob: 70% open Air volume adjustment knob: 50% open Pattern adjustment knob: 50% open

[0063] (effect of film thickness) The influence of the thickness of the damping material on the damping effect was evaluated. The vibration-damping material (rubber to filler mass ratio 1:1) is used, and the performance can be changed by changing the number of times it is applied. In addition, the vibration-damping material used in this evaluation did not contain any adhesive components. Measure the loss coefficient a of the substrate coated with the damping material, then remove the coating and measure the loss coefficient a of the substrate under the same conditions. The loss factor b of the specimen was measured, and the rate of change in the loss factor was calculated using the following formula (i) for evaluation. The higher the rate of change of the loss factor, the higher the vibration-damping effect of the vibration-damping material. {(ab) / b}×100(%) (i)

[0064] The results are shown in Figure 6. There is a drastic change (improvement) in the damping effect between film thicknesses of 0.5 mm and 1 mm. ) was recognized.

[0065] (Effect of adhesive component content) The influence of the adhesive component content on the vibration damping effect was evaluated by the rate of change in loss factor. The mass ratio of rubber to filler in the vibration damping material is fixed at 1:1, and the solid content (rubber and filler) is 1 The amount of adhesive component mixed per 0.00 mass parts was 5 mass parts (5 mass%; 1.6 mass% of the total vibration-damping material). % by mass, 10 parts by mass (10% by mass; 3.4% by mass of the entire damping material), and 20 parts by mass The evaluation was carried out using the mass portion (20 mass %; 7.2 mass % of the entire vibration-damping material). Throughout the evaluation, the film thickness was kept constant at 1 mm.

[0066] The results are shown in Figure 7. Although adhesive components are useful in terms of adhesion of the vibration-damping material to the substrate, It was shown that the lower the content of adhesive components, the higher the vibration damping effect of the vibration damping material (adhesive components (See also the value of "1.0 mm" in Figure 6, which indicates a case where the content is 0 mass %.) As mentioned above, this is The lower the content of adhesive components, the more easily they adhere to the interface between the rubber and filler, and between the rubber and the surface of the product. This is thought to be because friction is more likely to occur in the

[0067] (Effect of solid content concentration on the viscosity of vibration damping material) As described above, by appropriately controlling the film thickness, it becomes easier to obtain the desired vibration damping effect. Here, the desired film thickness can be obtained by a small number of coatings or a short coating time. This is very important from the viewpoint of workability. For example, according to the study by the inventor, The viscosity at 23°C (using a B-type rotational viscometer at a rotation speed of 6 rpm) is When the viscosity is 1,500 mPa·s or more, a film thickness of 1 mm or more can be easily obtained with a single application. The viscosity of the vibration-damping material can be adjusted by changing the solid content by increasing or decreasing the amount of organic solvent used. Therefore, we will examine how the viscosity of the damping material changes depending on the solid content concentration. The solid content was evaluated by fixing the mass ratio of rubber to filler in the vibration damping material at 1:1. After that, the amount of solids relative to the organic solvent was changed. The vibration damping material used did not contain any adhesive components. was ranked No. 1.

[0068] The results are shown below. When the rotation speed is 60 rpm Solid content concentration 10% by mass or more: Viscosity 3mPa·s or more Solid content concentration 15% by mass or more: Viscosity 10mPa·s or more

[0069] When the solid concentration is 30% by mass Rotation speed 6 rpm: Viscosity 1,500 mPa·s Rotation speed 12 rpm: Viscosity 850 mPa·s Rotation speed 30 rpm: Viscosity 420 mPa·s Rotation speed 60 rpm: Viscosity 250 mPa·s

[0070] This evaluation showed that the viscosity of the damping material increased significantly as the solid content increased. Therefore, for example, productivity can be improved by obtaining a thick coating film in one application. If you want to increase the viscosity, you can use a damping material with a high solid content. High-strength damping materials may be difficult or impossible to apply with a spray can or gravity-fed spray gun. In that case, it is recommended to use a pressure-feed spray gun or a brush. This can be done.

[0071] The above verification has shown that the vibration damping effect can be obtained by the method of the present invention. According to the method, the vibration-damping effect is exerted by the coating film obtained by applying the liquid vibration-damping material. The vibration damping material containing rubber can be applied regardless of the surface shape of the target article or substrate. [Explanation of symbols]

[0072] 1... Vibration damping material, 2... Spray gun, 3... Container, 4... Compressor, 5... Air hose, 6...liquid hose, 7...air hose, 8...power supply, 9a, 9b...air, 10...item, 11...surface Surface, 20...spray gun, 30...cup, 90...air, 101...brush, 102...container, P ...Worker.

Claims

1. 1. A method for producing an at least partially coated article, comprising: Liquid damping materials containing organic solvents and rubber are sprayed, brushed, dispensed, or applied by de- applying the composition to the surface of the article by tipping.

2. A method for damping vibration of a substrate, comprising: Liquid damping materials containing organic solvents and rubber are sprayed, brushed, dispensed, or applied by de- applying the composition to the surface of the substrate by tipping.

3. 2. The method according to claim 1, wherein the thickness of the coating is 0.5 mm or more in one application.

2. The method according to claim 2.

4. 3. The method according to claim 1, wherein the surface is degreased and / or cleaned before the step. How to do it.

5. 3. The method of claim 1 or 2, wherein the step is carried out using a pressure-fed spray gun.

6. The viscosity of the vibration damping material at 23°C (using a B-type rotational viscometer at a rotation speed of 6 rpm) 3. The composition according to claim 1, wherein the viscosity of the composition is 1,500 mPa·s or more. How to do it.

7. The method according to claim 1 or 2, wherein the solid content of the vibration-damping material is 10% by mass or more.

8. 3. The method according to claim 1, wherein the rubber is a butyl rubber or a halogenated butyl rubber. How to do it.

9. The method of claim 1 or 2, wherein the vibration-damping material further comprises an adhesive component.

10. The method of claim 1 or 2, wherein the vibration-damping material further comprises a filler.

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