JP2000079363A - Masking material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make fixing with a pressure sensitive adhesive tape, and the like, after fitting to parts to be masked unnecessary and to simplify masking by bonding plastic moldings in which the parts to be masked are placed to be coated and protected by at least one means of adhesion by an adhesive, welding by a solvent, or fusion by heat to each other. SOLUTION: A frame body engagement part 11 to be engaged with the frame body 60 of a window frame 6 and a flange engagement part 61 to be engaged with the flange 61 of the window frame 6 are formed between two moldings 2, 3 to fit the shape of the window frame 6 of a part to be masked. In the moldings 2, 3, the hook tip part 21 of the molding 2 and the upper end part 31 of the molding 3 are bonded with an adhesive 4 to each other. After a masking material 1 being fitted to the window frame 6 with the engagement parts 11, 61 engaged with the window frame body 60 and the window flange 61, respectively, since the moldings 2, 3 are sealed by an adhesive 4 in spray coating, coating mist is prevented from entering the window frame 6. In this way, fixing with a pressure sensitive adhesive tape, and like, after fitting to the part 6 to be masked is made unnecessary, and masking can be carried out simply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a masking material used for protecting a door frame or the like from being painted, for example, when painting an automobile.

[0002]

2. Description of the Related Art As shown in FIG. 11, for example, a thin flange 61 for attaching a weather strip is provided at an edge of a window frame 6 of an automobile door. The masking material 1P used to protect the window frame 6 having such a shape from surface treatment such as painting is a flange that fits with the flange 61 of the window frame 6 so as to conform to the shape of the window frame 6. It is necessary to form the fitting portion 12P.

Conventionally, the masking material 1P is formed by, for example, vacuum forming using a thermoplastic plastic sheet. The masking material 1P having such a flange fitting portion 12P is integrally formed by vacuum forming or the like. In the case of forming by molding, the flange fitting portion 12P becomes a deep drawing forming portion, and it is difficult to obtain an accurate shape of this portion, and it is also difficult to release the mold. For this reason, the masking material 1P is formed so as to be divided into two at a position corresponding to the edge of the flange 61 so as to eliminate the deep drawing portion.

[0004]

In such a masking material 1P, after each molded product 2P, 3P is attached to the window frame 6, the edges of the molded products 2P, 3P are mutually bonded by an adhesive tape 7P. Since it was fixed, the labor was large and a lot of time was spent in the masking process. In particular, when masking is performed on a continuous mass production line such as an automobile manufacturing plant, smooth operation has been significantly impeded.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a masking material which can be easily masked without requiring fixing with an adhesive tape or the like after being attached to a masked portion.

[0006]

In order to solve the above-mentioned problems, the present invention provides a masking material (1) for covering and protecting a masked part (6) between a plurality of plastic moldings (2, 3). Wherein the plurality of plastic molded articles (2, 3) are joined to each other by at least one of adhesion by an adhesive (4), welding by a solvent, and fusion by heat. (1) is provided. Here, the term “plurality” is not limited to 2 and refers to any integer of 2 or more.

According to the masking material (1), since it is not necessary to join the plastic moldings (2, 3) to each other with an adhesive tape or the like after the masking material (6) is attached, the masking can be easily performed. It can be carried out.

[0008] The adhesive (4) may be impregnated in the base material, or may be applied to both surfaces of the base material. As described above, a material obtained by impregnating the base material (5) with the adhesive (4) (adhesive-impregnated base material) or a material obtained by applying the adhesive (4) to both surfaces of the base material (5) (double-sided tape) is used. This prevents the adhesive (4) from sticking out due to the application of the adhesive,
The plastic molded articles (2, 3) can be easily joined to each other.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 shows a masking material according to an embodiment of the present invention. The masking material 1 is used to protect a part of a window frame 6 of an automobile door from surface treatment such as painting as shown in FIG. Flanges 61 for attaching strips
Is provided.

The masking material 1 is composed of two plastic moldings 2 and 3 divided at a position corresponding to the end of the flange 61 so as to conform to the shape of the window frame 6 which is the portion to be masked. A body fitting portion 11 fitted to the body 60 of the window frame 6 and a flange fitting portion 61 fitted to the flange 61 of the window frame 6 are formed between the two molded products 2 and 3. Have been.
A hook 20 having a U-shaped cross section is formed at the edge of the flange fitting portion 61 of one molded product 2.
3 are formed between the tip 21 of the hook 20 of the molding 2 and the molding 3
And an upper end portion 31 of the second member.

The two molded articles 2 and 3 are, for example, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl chloride copolymer, vinyl chloride resin, vinylidene chloride. Resin, styrene resin, acrylic resin, methacrylate resin, vinyl propionate resin, vinyl acetate-maleic acid resin, vinyl chloride-vinyl acetate resin, polyvinyl ether resin, polyester resin, polyamide resin, etc. Thermoplastic sheet, or polyamide (PA), polyester (PE), polyacetal (POM), polycarbonate (PC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polysulfone (PSF), polyethersulfone (PE) ), Polyphenylene oxide (PP
O), polyphenylene sulfide (PPS), polyarylate (PAR), polyetheretherketone (PE
EK), polyamide imide (PAI), polyimide (P
I), polyetherimide (PEI), polyaminobismaleimide, methylpentene copolymer (TPX), fluororesin such as cellulose acetate (CA), polyallylether, polytetrafluoroethylene (PTFE), amorphous polymer, polyaminobismaleimide, etc. Sheets of engineering plastics, or polymer alloys of the above engineering plastics and other thermoplastics, such as PPO-high impact polystyrene polymer alloy, PPO-polyamide polymer alloy, PE-high impact polystyrene polymer alloy, PE-polyamide polymer alloy, Nylon-modified polyolefin polymer alloy, nylon-acrylonitrile / styrene / butadiene copolymer (ABS) polymer Lee, nylon -PPO polymer alloy, POM thermoplastic polyurethane polymer alloy, PBT-acrylic rubber polymer alloy, PBT-A
BS polymer alloy, PBT-polyester ether elastomer polymer alloy, PBT-PET polymer alloy, PBT-PC polymer alloy, PPO-PTFE
Polymer alloy, PBT-PTFE polymer alloy, P
ET-PTFE polymer alloy, PET-PAR polymer alloy, PC-PTFE polymer alloy, PAR-P
It is manufactured by molding a plastic sheet such as a TFE polymer alloy or a nylon-PTFE polymer alloy by vacuum molding, press molding or the like. The plastic sheet may be one kind or a mixture of two or more kinds, and may have a multilayer structure.

The plastic sheets used in the molded articles 2 and 3 include, for example, calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfate, calcium sulfite, calcium phosphate, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, and oxide. Magnesium, titanium oxide, iron oxide, zinc oxide, alumina, silica, diatomaceous earth, dolomite, gypsum, talc, clay, asbestos,
Mica, glass fiber, carbon fiber, calcium silicate, benite, white carbon, carbon black, iron powder, aluminum powder, stone powder, blast furnace slag, inorganic fillers such as fly ash, cement, zirconia powder, cotton, hemp, wool, etc. Organic fibers such as natural fibers, polyamide fibers, polyester fibers, acrylic fibers, viscose fibers, acetate fibers, vinyl chloride fibers, vinylidene chloride fibers, asbestos fibers, glass fibers, carbon fibers, ceramic fibers, metal fibers, whiskers, etc. Add reinforcing materials such as organic fillers such as inorganic fiber, linter, linen, sisal, wood flour, coconut flour, walnut flour, starch, wheat flour to improve shape retention, dimensional stability, compression and tensile strength, etc. May be. The above fillers are usually
About 0.5 to 200% by weight is added. It may be colored with a pigment or a dye for the purpose of identifying the masking site and colored. Further, a plasticizer such as DOP or DBP, an antioxidant, an antistatic agent, a crystallization accelerator, a flame retardant, a flame retardant Agents, insect repellents, preservatives, waxes, lubricants, anti-aging agents, UV absorbers,
A foaming agent such as a chemical foaming agent or a capsule foaming agent may be added. These additives may be added alone or as a mixture of two or more.

The molded articles 2 and 3 may have been subjected to a pretreatment for improving adhesiveness, for example, a primer treatment or a plasma treatment. The primer used for the primer treatment may be appropriately selected according to the material of the molded products 2 and 3 and the type of the adhesive 4, and examples thereof include silicone-based, urethane-based, acrylic-based, and epoxy-based ones.
Such a pretreatment only needs to be performed on at least the bonding surfaces of the moldings 2 and 3.

An adhesive 4 for adhering the molded products 2 and 3 to each other
May be appropriately selected depending on the material of the molded products 2 and 3, for example, urea resin, melamine resin, phenol resin, resorcin resin, alkylresorcin resin,
Thermosetting adhesives such as epoxy resin, phenolic epoxy resin, furan resin, silicone resin, polyisocyanate, polyester polyisocyanate, polyethyleneimine, cellulose, polyvinyl acetate, vinyl acetate-vinyl chloride copolymer, polychlorinated Vinyl, polyvinyl formal, polyvinyl butyral, vinyl acetate-ethylene copolymer, acrylic resin, methacrylic resin, cyanoacrylate, polyamide resin, thermoplastic adhesive such as thermoplastic polyether, or natural rubber, chloride rubber,
Recycled rubber, styrene-butadiene rubber, nitrile rubber,
Rubber-based adhesives such as chloroprene rubber, butyl rubber, polyisobutylene rubber, polyurethane rubber, polysulfide rubber, and silicone rubber can be used, and various fillers may be added to the adhesive. The adhesive 4 may be liquid or semi-solid, and may be any of an emulsion type, a water-soluble type, and a solvent type.

Further, the adhesive 4 may be an adhesive, an acrylic resin, an epoxy, a natural rubber, a synthetic rubber, or the like, a thermosetting type, a photosensitive type, Any type such as a pressure type, a moisture absorption type, and a hot melt type may be used.

The adhesive 4 may be applied directly to the adhesive surface of the hook tip 21 of the molded article 2 and / or the adhesive surface of the upper end 31 of the molded article 3 as shown in FIG. As shown, a suitable base material 5 may be impregnated and adhered via the obtained adhesive impregnated base material, or may be applied to both surfaces of a suitable base material 5,
You may adhere | attach through the obtained double-sided tape. When the base material 5 is impregnated, the adhesive 4 is preferably liquid, and when applied to both surfaces of the base material 5, the adhesive 4 is preferably an adhesive.

The base material that can be impregnated with the adhesive 4 includes
Various materials such as paper, nonwoven fabric, woven / knitted fabric, various foams, string, thread, etc. can be used, and as a substrate on which the adhesive 4 can be applied, paper, nonwoven fabric, woven / knitted fabric, various foams, Various sheets such as various sheets and plastic films can be used. By using a material in which the base material is impregnated with the adhesive 4 (adhesive-impregnated base material) or a material coated on both surfaces of the base material (double-sided tape), the adhesive 4 is protruded by applying the adhesive. And the like can be prevented, and the moldings 2 and 3 can be easily joined to each other.

Although the molded products 2 and 3 in the present embodiment are adhered to each other by the adhesive 4, the present invention is not limited to this, and the molded products 2 and 3 may be welded by a solvent. Alternatively, they may be fused by heat, or may be joined by appropriately combining them.

The solvent used for welding the molded products 2 and 3 to each other may be any as long as it can dissolve and adhere the plastic constituting the molded products 2 and 3, and is appropriately selected according to the type of the plastic. And use it. Examples of such a solvent include hydrocarbon solvents such as benzene, toluene, xylene and hexane, methylene chloride, halogenated hydrocarbon solvents such as methyl chloride, methanol, ethanol, and the like.
One or two kinds of alcohol solvents such as cyclohexanol, ether / acetal solvents such as tetrahydrofuran and 1,4-dioxane, ketone solvents such as acetone, methyl ethyl ketone and cyclohexanone, and ester solvents such as ethyl acetate and methyl acetate. The above mixed solvents can be used. The fusion by heat is performed by hot air welding, infrared welding, inner surface heat irradiation welding, friction welding, flame welding, high frequency welding, high frequency sewing machine welding, microwave welding, ultrasonic welding,
It can be performed by various means such as ultrasonic welding.

The masking material 1 is composed of two plastic moldings 2 and 3, and is bonded by an adhesive 4 at the tip 21 of the hook 20 of the molding 2 and the upper end 31 of the molding 3. Therefore, each of the molded products 2 and 3 does not have a deep drawing portion, and can be easily formed by vacuum forming or press forming, and is easily released.

The masking material 1 is arranged such that the main body fitting portion 11 is fitted to the main body 60 of the window frame 6 and the flange fitting portion 61 is fitted to the flange 61 of the window frame 6 as shown in FIG. It is attached to the window frame 6. Since the two molded articles 2 and 3 constituting the masking material 1 are bonded to each other with the adhesive 4 in advance, there is no need to fix them with an adhesive tape or the like after attaching them to the window frame 6, and the window frame can be easily formed. 6 can be masked.

When the masking material 1 is attached to the window frame 6, spray coating is performed as shown in FIG. Since the joints between the moldings 2 and 3 of the masking material 1 are sealed by the adhesive 4, the paint mist does not enter the window frame 6 inside the masking material 1 during coating. In the present embodiment, since the joint between the molded products 2 and 3 is located at a position where the paint by spray coating is directly sprayed, the coating film 8 is formed on the joint. The masking material 1 can be used repeatedly, but by repeatedly using the masking material 1, the thickness of the coating film 8 formed on the joint portion between the molded products 2 and 3 increases, and the strength of the joint portion gradually increases. .

However, the joining portion of the molded product in the masking material of the present invention is not limited to the above-mentioned position (the side where the paint is sprayed on the flange fitting portion 12). For example, like a masking material 1a shown in FIG. 7, a flange 22a formed at the upper end of one molded product 2a and a hook 30a having a U-shaped cross section formed at the upper end of the other molded product 3a are flanged. Fitting portion
12a, or a hook having a U-shaped cross section formed at the upper end 23b of one molded product 2b and the upper end of the other molded product 3b, as in a masking material 1b shown in FIG.
30b may be joined to the flange fitting portion 12b on the side opposite to the paint spraying.

Further, the masking material 1c of the present invention is similar to that of FIG.
As shown in FIG. 5, a cushion material 9c may be provided inside each of the molding materials 2c and 3c. As the cushion material 9c, for example, a fiber woven fabric, nonwoven fabric, paper, foam, or the like is used, and two or more of these may be laminated. The cushion material 9c may be attached to a part of the inside of the molding materials 2c, 3c, or may be attached to the entire inner surface. By providing such a cushion material 9c inside the molding materials 2c and 3c, when the masking material 1c is attached to or detached from the masked portion 6, the masked portion 6 is not damaged. Sticking is prevented.

Further, as shown in FIG. 10, the masking material 1d of the present invention has a convex portion on the skirt portion 24d of the molding material 2d.
A hole 35d is provided at a position corresponding to the convex portion 25d of the skirt portion 34d of the molding material 3d, and after attaching the masking material 1d to the masked portion, the convex portion 25d of the molding material 2d is removed. By fitting into the hole 35d of the molding material 3d, the molding materials 2d, 3d may be fixed to each other.

The masking materials 1, 1a, 1 described above
Although b, 1c, and 1d mask a part of the window frame 6 of the automobile, the masking material of the present invention is not limited to this, and may be applied to any location.

[0027]

According to the masking material of the present invention, it is not necessary to fix with a pressure-sensitive adhesive tape or the like after attaching to the masked portion, and the masking can be performed easily.

[Brief description of the drawings]

FIG. 1 is a perspective view of a masking material according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a masked portion.

FIG. 3 is a perspective view showing a state before bonding of a masking material in FIG. 1;

FIG. 4 is a perspective view showing a state before bonding of a masking material in FIG. 1;

FIG. 5 is a cross-sectional view showing a state where the masking material in FIG. 1 is attached to a masked portion.

FIG. 6 is a cross-sectional view showing a state in which the masking material in FIG. 1 is attached to a masked portion and painting is performed.

FIG. 7 is a cross-sectional view showing a state in which a masking material according to another embodiment of the present invention is applied to a masked portion while being coated.

FIG. 8 is a cross-sectional view showing a state in which a masking material according to another embodiment of the present invention is applied to a masked portion while being coated.

FIG. 9 is a cross-sectional view showing a state in which a masking material according to another embodiment of the present invention is attached to a masked portion.

FIG. 10 is a perspective view showing a state before bonding of a masking material according to another embodiment of the present invention.

FIG. 11 is a perspective view of a conventional masking material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Masking material 2, 3 ... Plastic molding 4 ... Adhesive 5 ... Base material 6 ... Masked part (window frame)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D073 AA01 DB03 DB08 DB12 DB19 DB28 DB32 4D075 AD12 CA47 DA23 DB31 DC13 EA05

Claims (3)

[Claims] 1. A masking material for covering and protecting a masked portion by inserting a portion to be masked between a plurality of plastic molded products, wherein the plurality of plastic molded products are bonded by an adhesive,
A masking material which is joined by at least one of welding by a solvent or welding by heat. 2. The masking material according to claim 1, wherein the adhesive is impregnated in a substrate. 3. The masking material according to claim 1, wherein the adhesive is applied to both surfaces of the substrate.