JP2000197838A - Masking material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To repeatedly use a masking material for protecting a prescribed position even in surface treatment having a high temperature heating process by forming the masking material of a polyamide having a repeating units expressed by a specified formula to prevent the prescribed position from being coated during coating. SOLUTION: In order to prevent deformation in a surface treatment process in which heating at least 150 deg.C is required and to improve dimensional stability in water absorption and heating, a polyamide (a) having a repeating unit expressed by the formula is used for a masking material. Preferably, a polymer alloy of the polyamide is used. The polyamide (a) is generally prepared by the polycondensation of nonanediamine (H2N-(CH2)9-NH2) and terephthalic acid. The polyamide (a), another thermoplastic polymer, and others are used for the polymer alloy.

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 predetermined position of a member so as to prevent the coating from being applied to the predetermined position.

[0002]

2. Description of the Related Art A masking material is provided with an adhesive layer on the masking material if the portion to be protected is planar or a hole, and is attached to the portion or the hole via the pressure-sensitive adhesive layer. For example, the masking material is provided with an insertion portion and the insertion portion is inserted by inserting the insertion portion. If the masking material is plate-shaped, the masking material is provided with a fitting groove, and the masking material is mounted by fitting the fitting groove into the portion. If it is convex, a fitting portion is formed on the masking material, and the fitting is performed by fitting the portion to the fitting portion. Then, the masking material is removed from the portions after the surface treatment. As such a masking material, a material using a polyamide such as 6-nylon or 6,6-nylon as a material plastic has been proposed.

[0003]

However, the above-mentioned conventional masking material using a polyamide as a plastic material has insufficient heat resistance and is likely to be deformed in a surface treatment step requiring heating at 150 ° C. or more. There is
There is also a disadvantage that dimensional stability at the time of water absorption or heating is poor.

[0004]

In order to solve the above-mentioned conventional problems, the present invention has the following general formula (a):

Embedded image And a masking material characterized by using a polyamide made of a polymer alloy containing the above-mentioned polyamide as a material.

Hereinafter, the present invention will be described in detail. The material plastic used for the masking material of the present invention has the following general formula (a)

Embedded image (Hereinafter, referred to as “polyamide a”) or a polymer alloy containing the polyamide a. The polyamide a can be generally produced by polycondensing nonanediamine (H ₂ N— (CH ₂ ) ₉ —NH ₂ ) with terephthalic acid.

The above-mentioned polymer alloys include the above-mentioned polyamide a and other thermoplastics, 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, polyamide (PA) other than the above polyamide a, polyester (PE), polyacetal (P
OM), polycarbonate (PC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polysulfone (PSF), polyethersulfone (PES), 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. Polymer alloys with engineering plastics can be used.

[0007] Two or more kinds of the above-mentioned plastic materials may be mixed, or a foam may be used. Further, the material plastic includes calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfite, magnesium hydroxide, aluminum hydroxide, magnesium oxide, titanium oxide, iron oxide, zinc oxide, alumina, silica, diatomaceous earth, dolomite, Gypsum, talc, clay, asbestos,
Fillers such as mica, calcium silicate, bentonite, white carbon, carbon black, iron powder, aluminum powder, stone powder, blast furnace slag, fly ash, synthetic fiber, vegetable fiber, glass fiber, carbon fiber, ceramic fiber, whisker, A nonwoven fabric, a knitted fabric, or the like made of the above fibers may be mixed. The filler, the nonwoven fabric or the knitted fabric is usually mixed in an amount of about 10 to 200% by weight based on the material plastic.

Further, polyethylene, polypropylene, ethylene-propylene copolymer,
Thermoplastics such as polyolefins such as ethylene-vinyl acetate copolymer, polyvinyl chloride, polystyrene, polymethacrylate, polyvinylidene chloride, styrene-butadiene copolymer, polyester, polyamide or foams of the above thermoplastics, polyurethane foam One or more of the bodies may be mixed or laminated.

The surface of the above-mentioned plastic material is subjected to a treatment such as a corona discharge treatment or a primer treatment to further increase the affinity for the paint or the adhesive, or subjected to a release treatment to decrease the affinity for the paint or the adhesive. Or you may be. By increasing the affinity for paints and adhesives, when reusing the masking material, it prevents the paint film adhered to the masking material from being turned up by spray pressure, etc., and from scattering and contaminating surrounding coating parts. can do.

Examples of the primer used in the above-mentioned primer treatment include chlorinated polypropylene, modified polyolefin or olefin copolymer such as ethylene-vinyl acetate copolymer, styrene-butadiene rubber, acrylonitrile-butadiene rubber, chloroprene rubber and polybutadiene. Synthetic rubber or synthetic resin primer such as synthetic rubber, acrylic synthetic resin, vinyl synthetic resin, or acrylic synthetic resin containing amino group, amide group, etc., vinyl synthetic resin, amino synthetic resin or epoxy resin Or an aluminum alcoholate or aluminum chelate compound such as aluminum isopropylate or aluminum trisacetylacetonate; an alkyl metal such as 2-ethylhexyl lead or hexadecyl lithium; Acetate, organic tin compounds such as di-n-butyltin dioxide, silane compounds such as methylvinyldichlorosilane, acetylacetone lithium, metal complex salts of 1,3-dicarbonyl such as acetylacetone beryllium, and organic titanium compounds such as tetrabutyltitanate; Boric acid compounds such as tri-n-butyl borate and triphenyl borate; phosphoric acid esters such as trioleyl phosphate and tridecyl phosphate; metal carboxylates such as magnesium stearate and cobalt naphthenate; n-dodecyl mercapto Metal thioalcoholates such as potassium salts, thiodicarboxylates such as zinc 2-ethylhexanedithioate, metal dithiocarbamates such as nickel dimethyldithiocarbamate and copper dimethyldithiocarbamate, and gold sulfonates such as nickel benzenesulfonate Salt, there are primers low molecular weight such as organic phosphoric acid metal salts such as dibutyl phosphate vanadium, the primer is used as one or a mixture of two or more. The primer is a synthetic resin or rubber having good adhesiveness to both the polyamide a or the polymer alloy paint vehicle or a synthetic resin other than the polyamide a or the polymer alloy generally used as an adhesive, or the various primers described above. Is used. Particularly preferable examples of the primer include acrylic synthetic resins and amino synthetic resins containing quaternary ammonium salts. In order to perform the primer treatment using one or a mixture of two or more kinds of the above-mentioned various primers, a solution or an emulsion (latex) of a mixture of one or more kinds of the above-mentioned various kinds of primers is used as a plastic material as a material of the above-mentioned masking material. Apply to surface and dry. Prior to the primer treatment, the surface of the plastic material may be subjected to an affinity treatment. Examples of the affinity treatment applied to the surface of the material plastic made of polyamide a include a flame treatment for giving an affinity by slightly carbonizing the surface, a sulfuric acid treatment, and a corona discharge treatment for roughening and slightly carbonizing the surface.

The release agent used for the surface treatment of the above-mentioned material plastics includes a silicone release agent, a fluorine release agent, a fatty acid salt release agent, a paraffin release agent, a wax release agent and the like. There is. In order to perform the release treatment using one or a mixture of two or more of the various release agents, a solution or emulsion (latex) or a melt of a mixture of one or two or more of the various primers is subjected to the masking. Apply to plastic surface as material and dry.

The above-mentioned plastic material may be colored with a pigment or a dye to identify a masking portion and may be color-coded. Further, a flame retardant, a flame retardant, an insect repellent, a preservative,
A third component such as an anti-aging agent, an ultraviolet absorber, a foaming agent such as a chemical foaming agent or a capsule foaming agent may be added. These third components may be added alone or in admixture of two or more.

In order to produce a masking material from the above-mentioned plastic material, a method of forming a film or a sheet into a predetermined shape by vacuum forming is usually the most suitable method for mass production. Blow molding, injection molding and the like may be applied. The plastic film or sheet may be either a non-stretched type or a stretched type.

[0014]

The polyamide a is characterized by extremely high heat resistance (melting point: 308 ° C.), low water absorption, and excellent dimensional stability during water absorption and heating. Furthermore, it has a small specific gravity and is excellent in lightness, has a large allowable deformation amount until breakage, is excellent in impact resistance, and has high resistance to solvents such as alcohols and aromatic hydrocarbons. The polymer alloy containing the polyamide a has both the properties of the polyamide a and the properties of other resins constituting the polymer alloy. Therefore, the polyamide a or the polyamide a
A masking material made of a polymer alloy containing
It does not soften and deform even at a temperature of 50 ° C. or more, has excellent dimensional stability and durability, and has high mechanical strength.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Masking Material A] Masking material A is applied to a flat plate-shaped part which is not to be coated.

1 to 3 show a first embodiment of the present invention. In the figure, the masking material (31) is a square box-shaped main body (31
A) and an adhesive layer (31B) formed on the lower surface of the main body (31A), and the polyamide a (PA9, manufactured by Kuraray Co., Ltd.)
It is manufactured by vacuum forming a sheet of the polyamide a using T) as a material. The adhesive layer (31B) is covered with a release sheet (31C) such as a polyethylene film, a polypropylene film, or release paper. Thus, the masking material (31) has an adhesive layer (31B) with a release sheet (31C).
It can be stacked because it is protected by, it is convenient for transportation and storage.

As shown in FIG. 2, the masking material (31) is protected by peeling off the release sheet (31C) on the portion (2) of the member (1) where the flat coating should not be applied, and then peeling it off. I do. Then, a paint is sprayed on the surface of the member (1) by spraying. The portion (2) may be provided with a hole.
In this case, the inside of the hole is also protected by the masking material (31). After forming the coating film (4) in this manner, the masking material (31) is peeled off by a worker's hand before or after the heat treatment, for example, as shown in FIG.
The masking material (31) of the present embodiment is made of the sheet as described above, so that it can be easily vacuum formed and the masking material (31) can be reused without deformation even after the heat treatment. Further, the surface of the masking material (31) that has been subjected to silicon treatment has a reduced affinity for the paint, facilitates peeling of the paint, and is more convenient when the paint is peeled and the masking material is reused. It is.

FIG. 4 shows a second embodiment of the present invention.
In the masking material (32) of this embodiment, the main body (32A) is in the shape of a cylindrical container, and is produced by injection molding using the above-mentioned polyamide a as a material. An adhesive layer (3
2B) is formed, and the adhesive layer (32B) is a release sheet (32C).
Covered by The masking material (32) is used for protecting the flat portion of the member similarly to the masking material (31) of the first embodiment, and the portion may be provided with a hole. And, like the masking material of the first embodiment, vacuum forming is easy and reusable.

FIGS. 5 and 6 show a third embodiment of the present invention. In the figure, the masking material (33) is a square box-shaped main body.
(33A), a flange (33B) provided on the upper edge of the main body (33A), and an adhesive layer (33C) formed on the lower surface of the main body (33A). It is manufactured by vacuum forming the sheet. The adhesive layer (33C)
Is covered with a release sheet (33D). The masking material (33) is applied to the plate-like portion (2) of the member (1) in the same manner as the masking material (31) of the first embodiment, but as shown in FIG. Film by the collar (33B)
Since (4) is cut, the masking material (33) is coated with the coating film (4).
It can be easily detached by the operator's hand without being disturbed by the operator. And, like the masking material of the first embodiment, vacuum forming is easy and reusable. The masking material (33) is made of a plurality of masking materials from the sheet as shown in FIG.
It is desirable that (33) be arranged vertically and horizontally and vacuum formed integrally. In this case, the masking material (33) is provided with a groove or a groove (33E) on one or both sides of the flange portion (33B) so that each masking material (33) can be easily torn off by hand. The collar (33B)
The notch or groove (33E) may be formed integrally during vacuum forming of the masking material (33), or may be formed separately after vacuum forming.

FIG. 8 shows a fourth embodiment of the present invention. The masking material (34) of this embodiment has a rectangular box-shaped main body (34A) having a rectangular box-shaped handle (34D) standing upright from the bottom. ) And the body (3
4A) An adhesive layer (34B) formed on the lower surface, which is produced by vacuum-forming a sheet of polyamide a using the above-mentioned polyamide a as a material. The adhesive layer (34B) is covered with a release sheet (34C). The masking material (34) is used in the same manner as in the first embodiment, but the handle (34) is used.
D) makes it extremely easy to attach and detach. And the first
Like the masking material of the embodiment, it is easy to vacuum form and can be reused.

[Masking Material B] The masking material B is applied to a flat portion and a convex portion where the member is not to be coated. The masking material B is produced by vacuum molding using a two-layer sheet of a sheet made of the above-mentioned polyamide a and a sheet made of polyethylene terephthalate.

FIGS. 9 and 10 show a fifth embodiment of the present invention. In the figure, the masking material (35) is a rectangular container-shaped main body (35A), a flange (35B) formed on the outer periphery of the upper edge of the main body (35A), and an adhesive layer formed on the upper surface of the flange (35B). (35
C), and the release layer (35D) is formed on the adhesive layer (35C).
Is coated. As shown in FIG. 10, the masking material (35) peels off the release sheet (35D) and applies a flat coating of the member (1) via the adhesive layer (35C) on the upper surface of the flange (35B). Attach it to the part that should not be (2). And the paint film by painting
After forming (4), the masking material (3
5) is removed. The portion (2) may be provided with a hole. Further, as shown in FIG. 11, the masking material (35) of this embodiment may protect the convex portion (21) by being applied to the convex portion (21) on the surface of the member (1). The masking material (35) of this embodiment is easy to vacuum form, does not deform even by heat during surface treatment, and can be reused after removal.

In the method of manufacturing the masking material (35) of this embodiment, it is particularly recommended that a plurality of masking materials (35) are arranged vertically and horizontally from the two-layer sheet as shown in FIG. It is desirable to perform vacuum forming. In this case, cuts (35E) are made in the release sheet (35D), and correspondingly, cuts or grooves (35F) are provided on one or both sides of the flange (35B) of the masking material (35). Masking material
(35) is easily torn off by hand. The cuts or grooves (35F) of the flange (35B) may be formed integrally during vacuum forming of the masking material (35), or may be formed separately after vacuum forming.

FIGS. 13 and 14 show a sixth embodiment of the present invention. In the figure, a masking material (36) is formed on a cylindrical container-shaped main body (36A), a flange (36B) formed on the outer periphery of an upper edge of the main body (36A), and further formed on an outer periphery of the flange (36B). Folded part (36E) and adhesive layer formed on the upper surface of the flange part (36B)
(36C) and the release layer (36C) is formed on the adhesive layer (36C).
D) is coated. The masking material (36) is a release sheet.
(36D) is peeled off and adhered, for example, to the portion (2) having the hole (22) of the member (1) via the adhesive layer (36C) on the upper surface of the flange portion (36B), and then as shown in FIG. A coating film (4) is formed by coating the coating material (4), and the coating film (4) is formed on the flange (3) of the masking material (36).
The masking material (36) can be easily detached by hand without being hindered by the coating film (4) because it is cut by the bent portion (36E) of 6B). And, like the masking material of the fifth embodiment, vacuum forming is easy and reusable. The hole (22) may not be present in the portion (2) of the member (1).

[Masking Material C] The masking material C is inserted into the hole of the member to protect the hole. The masking material C is manufactured by vacuum-forming a sheet of the polyamide a using the above-described polyamide a as a material.

FIGS. 15 and 16 show a seventh embodiment of the present invention. The masking material (37) of the present embodiment includes a container insertion portion (37A) and a flange (37B) formed on the outer periphery of the upper edge of the insertion portion (37A). The masking material (37) protects the inside of the hole (22) by being inserted into the hole (22) of the member (1) through the insertion portion (37A) as shown in FIG. The periphery of the hole (22) is protected by the flange (37) B. After inserting the masking material (37) into the hole (22), a coating film (4) is formed as shown in FIG. 16 by coating, and the inside of the hole (22) and the periphery of the hole (22) are formed. Does not form the coating film (4). The masking material (37) is usually removed by an operator after the heat treatment of the coating film (4), but the masking material (37) is easy to vacuum form and does not deform even by the heat treatment, and is reused. Is possible. Those that have been subjected to a primer treatment using an acrylic synthetic resin containing a quaternary ammonium salt on the surface of the masking material (37) further improve the adhesion of the paint,
Even after the heat treatment, there is no peeling of the paint from the surface of the masking material, and thus there is no contamination of the surroundings by the peeled paint, which is more convenient when the masking material is reused as it is.

FIG. 17 shows an eighth embodiment of the present invention. The masking material (38) of the present embodiment has a handle portion (38) from the bottom.
C) a container-shaped insertion portion (38A) in which the upright portion is erected, and the insertion portion (38A)
And a flange (38B) formed on the outer periphery of the upper edge. The masking material (38) is used in the same manner as in the seventh embodiment. However, since the masking material (38) has the handle (38C), it can be easily attached to and detached from the hole. And, like the masking material of the seventh embodiment, it is easy to vacuum form and can be reused.

FIGS. 18 and 19 show a ninth embodiment of the present invention. The masking material (39) of the present embodiment is provided with a cylindrical container-shaped insertion portion (39A), a flange portion (39B) formed on the upper edge of the insertion portion (39A), and an erect portion from the outer periphery of the flange portion (39B). Rising section (39C). The masking material (39) is inserted into the hole (22) of the member (1) through the insertion portion (39A) as in the seventh embodiment, but is erected from the outer periphery of the flange (39B). Rise (3
9C), the coating film (4) is cut as shown in FIG.
Thus, the detachment of the masking material (39) is performed smoothly.
And, like the masking material of the seventh embodiment, it is easy to vacuum form and can be reused.

FIG. 20 shows a tenth embodiment of the present invention. The masking material (310) of this embodiment includes a cruciform container-shaped insertion portion (310A) and a flange portion (3) formed on the upper edge of the insertion portion (310A).
10B) and a peripheral wall portion (310C) erected from the outer periphery of the flange portion (310B).
Consists of The masking material (310) is used in the same manner as in the ninth embodiment, but since the insertion portion (310A) has a cross shape, the insertion portion (3
10A) Since the outer periphery only partially touches the inner wall of the hole, desorption is easy, and the material is saved as compared with a cylindrical container. And, like the masking material of the seventh embodiment, it is easy to vacuum form and can be reused.

FIGS. 21 and 22 show an eleventh embodiment of the present invention. The masking material (311) of this embodiment has a container-like insertion portion (311A), an upper flange portion (311B) formed on the upper edge of the insertion portion (311A), and a hanging edge from the periphery of the upper flange portion (311B). Peripheral wall portion (311C), and a lower flange portion protruded from a lower edge of the peripheral wall portion (311C).
(311D), a handle (311E) protruding from the center of the bottom surface of the main body (311A), and ribs (311F) and (311F) formed on the bottom surface of the main body (311A) and the upper flange (311B), respectively. 311G), and is used in the same manner as in the eighth embodiment. However, as shown in FIG. 22, for example, the coating film (4) applied to the member (1) is cut from the lower edge of the peripheral wall (311C). The lower collar portion (311D) is more completely performed, and the detachment of the masking material (311) from the hole portion (22) is thus performed more completely. The masking material (31
1) is the rib (311A) on the bottom of the insertion part (311A) and the upper flange (311B).
F), (311G) is reinforced or crushed or destroyed. And, like the masking material of the seventh embodiment, it is easy to vacuum form and can be reused.

FIGS. 23 and 24 show a twelfth embodiment of the present invention. The masking material (312) of the present embodiment has a cylindrical container-shaped insertion portion (312A) having a vertical rib (312C) formed on the outer periphery,
The insertion portion (312A) includes a flange (312B) formed on the upper edge. The masking material (312) is the same as in the seventh embodiment shown in FIG.
Is inserted into the hole (22) of the member (1) as shown in FIG. 5, since the vertical rib (312C) of the masking material (312) elastically presses against the inner wall of the hole (22). The masking material (312) is reinforced by the vertical ribs (312C) without falling off before or during coating due to vibration or the like. And, like the masking material of the seventh embodiment, it is easy to vacuum form and can be reused.

[Masking Material D] The masking material D is applied to the eaves-like portion of the member which is not to be subjected to surface treatment. The material is made of the above-mentioned polymer alloy of polyamide a and polyphenylene oxide, and a sheet of the polymer alloy is vacuum formed. Manufactured by

FIGS. 25 and 26 show a thirteenth embodiment of the present invention. The masking material (313) of this embodiment comprises a cylindrical container-shaped main body (313A) and a fitting groove (313B) provided from the open end of the main body (313A). The above masking material (313)
Is the member (1) as shown in FIG. 26 through the fitting groove (313B).
To protect the portion (23) from painting, and the coating (4) is not formed on the portion (23). After the treatment, the masking material (313) is manually separated from the portion (23). And it is easy to vacuum form and reusable.

FIG. 27 shows a fourteenth embodiment of the present invention. The masking material (314) of the present embodiment is a square box-shaped main body (314A)
And a fitting groove (314B) provided from an open end of the main body (314A).
And used in the same manner as in the thirteenth embodiment. And, like the masking material of the thirteenth embodiment, vacuum forming is easy and reusable.

FIGS. 28 to 33 show the masking materials A,
An example is shown in which B, C, and D are applied to the rust prevention, soundproofing, and vibration-proofing treatment of the floor (12) of a vehicle body (11). In FIG. 28, the masking material of the present invention is A, B, C,
Used for each part of D and E. That is, in FIG. 29, the hole (22A) of the portion A is a hole for inserting the spring shaft of the front wheel, and the periphery of the hole (22A) is a spring seat. The inside of the hole (22A) and its surroundings are protected by using the masking material (37) of FIG. 30. In FIG. The bolt (21A) is protected by using (36), and in the drainage hole (22C) of the portion C in FIG. 31, the water is removed by using the masking material (38) belonging to the masking material C, for example, the eighth embodiment. Hole
(22C) Protecting the inside, and in FIG. 32, the masking material (3
13), the bracket (23D) is protected. In FIG. 33, the part mounting screw hole (22E) of the part E is formed by using the masking material (31) of the first embodiment belonging to the masking material A. The inside of the screw hole (22E) is protected.

FIGS. 34 to 38 show a fifteenth embodiment of the present invention. The masking material (315) of this embodiment is used to protect the concave portion of the member. The masking material (315) is manufactured by vacuum forming the same two-layer sheet as the masking material B, and includes a main body (315A) and an adhesive layer (315B) formed on the outer peripheral edge of the main body (315A). The recess to which the masking material (315) is applied is shown in FIG. In the figure, (24) is an air intake below the bumper (13), and inside the air intake (24) is a pair of columns (24A), (24A) and a vertical bar (24A).
B) and a crosspiece (24C) are provided. The masking material (315) fits into the inside shape of the air intake (24) so that the column fitting grooves (315C), (315C) and the vertical bar fitting groove (315C).
D), and a crosspiece fitting groove (315E). In addition,
The adhesive layer (315B) may be covered with a release sheet, a protective film, or the like. When using the masking material (315), the release sheet is peeled off. The above masking material (31
5) is fitted inside the air inlet (24) as shown in FIG. 37. At this time, the support fitting groove (315) of the masking material (315) is used.
(C) and (315C) are fitted with the columns (24A) and (24A) of the air intake (24), and the vertical and horizontal beam fitting grooves (315D) and (315E) are
4B) and the crosspiece (24C) are fitted together, and the surrounding surface of the masking material body (315A) is further interposed through the adhesive layer (315B).
In close contact. In this way, the masking material (315A) fits and closely adheres to the inner shape of the air inlet (24). After the masking material (315) is fitted inside the air inlet (24), the paint is sprayed by a spray (5) as shown in FIG. 37, and the periphery of the air inlet (24) is coated. (4), but the coating (4) is not formed inside the air inlet (24) protected by the masking material (315). After the coating, as shown in FIG. 38, the masking material (315) is peeled off from the inside of the air inlet (24) by the operator's hand. The masking material
(315) is easy to vacuum form and can be reused without being deformed by heating after painting.

FIGS. 39 and 40 show a sixteenth embodiment of the present invention. The masking material (316) of this embodiment is the first
It protects the bumper (13) as in the fifth embodiment,
The masking material (316) has an air inlet of the bumper (13).
(24) is formed with a fitting portion (316A) to be fitted, and the fitting portion (316
The lower edge of (A) is formed with a U-shaped flange (316B), and horizontal ribs (316C), (316D), vertical ribs (316E), (316F)
Are formed for reinforcement. The above masking material (31
6) is attached to the bumper (13) by fitting it to the air inlet (24) of the bumper (13) through the fitting portion (316A). At this time, the fitting of the masking material (316) is performed. Since the portion (316A) is reinforced by the flange (316B) and is prevented from being deformed, the fitting operation is easy. In this state, the surface of the flange (316B) and the lower edge of the air inlet (24) of the bumper (13) are substantially flush with each other as shown in FIG. 40, so that the surface can be easily stopped with adhesive tape (316G). You can wear it. The masking material (316) of the present embodiment is made of the polyamide a
Is the material.

FIGS. 41 to 43 show a seventeenth embodiment of the present invention. The masking material (317) of this embodiment is also a bumper.
(13) is protected. That is, the bumper (13) is provided with a pair of left and right air intakes (24), (24), and inside the air intakes (24), (24), vertical rails (24B), (24B) And (24C), (24C) are provided, and the air intakes (24), (2
As shown in FIG. 42, grooves (24A) and (24A) are formed on the upper edge of 4), and steps (24D) and (24D) are formed on the lower edge. The masking material (317) protects the air inlets (24), (24) of the bumper (13) from painting,
The masking material (317) has an air inlet for the bumper (13).
(24), A pair of left and right fitting parts (317A), (317A)
Are formed, fitting flanges (317B) and (317B) are formed on the upper edges of the fitting portions (317A) and (317A), and bent portions (317C) and ( 317C), and horizontal bar fitting portions (317D) and (317D) and vertical bar fitting portions (317E) and (317E). The masking material (317) is a bumper (13)
Fittings (317A) and (317A) into the air inlets (24) and (24) of the air inlets (24) and (24), and the horizontal rails (24C) and (24C) of the air inlets (24) and (24)
And the vertical bars (24B) and (24B) are connected to the horizontal bar fitting portions (317D) and (317D) of the masking material (317) and the vertical bar fitting portions (317E),
(317E) to be fitted to the bumper (13). At this time, as shown in FIG. 43, fitting of the upper edges of the fitting portions (317A) and (317A) of the masking material (317) is performed. Connect the mating flanges (317B) and (317B) to the air intakes (24) and (2
4) Fit into the upper edge grooves (24A), (24A) to hold the upper edge without using adhesive tape. In addition, fitting part (317A),
The lower edge of (317A) is reinforced by the bent portions (317C) and (317C) to prevent deformation, so that the fitting operation is easy. In this state, the surfaces of the bent portions (317C), (317C) and the steps (24D), (24D) of the air intakes (24), (24) of the bumper (13)
As shown in FIG. 43, it can be easily fixed from above with an adhesive tape (317F).
The masking material (317) of this embodiment is made of the above polyamide a.

FIGS. 44 and 45 show an eighteenth embodiment of the present invention. The masking material (318) of this embodiment is used for protecting a plurality of convex portions of the member. The masking material (318) is composed of a main body (318A), which is a vacuum formed product of the same laminated sheet as in the fifteenth embodiment, and fitting portions (318B) and (318B) projecting from the main body (318A). Become. The masking material (3
As shown in FIG. 45, the projections (25) to which the surface treatment of the member (1) should not be subjected are provided with the fitting portions (318B) and (318B).
To protect the projection (25). And fifteenth
Like the masking material of the embodiment, it is easy to vacuum form and can be reused.

FIGS. 46 to 48 show a nineteenth embodiment of the present invention. The masking material (319) of the present embodiment is used to protect the planar portion of the member. The masking material (3
19) is a main body (31) made of the same laminated sheet as in the fifteenth embodiment.
9A) and an adhesive layer (319B) formed on the back surface of the main body (319A), and the adhesive layer (319B) is covered with a release sheet (319C). The masking material (319) is removed from the window of the automobile (13) as shown in FIG. 47 by removing the release sheet (319C).
(14) It is attached to the peripheral edge (27) via an adhesive layer (319B). Thereafter, the automobile (13) is coated and heated to form a coating (4). After the coating, the masking material (319) is peeled off from the window (14) periphery (27).
As shown in FIG. 48, the coating (4) was not formed on the peripheral edge (27) because of the protection by the masking material (19).
(319) is easy to vacuum form and can be reused without being deformed by heating after painting.

In addition to the above embodiment, in the fifteenth embodiment, in order to fix the masking material (315) inside the air inlet (24), the masking material (315) is adhered to the outer peripheral edge of the main body (315A). A layer (315B) was formed. Instead of the adhesive layer (315B), a masking material (315) and an air inlet were used as shown in FIG.
The adhesive tape (315C) may be attached to the periphery of (24) for fixing. The adhesive tape (315C) may be adhered over the entire circumference of the masking material (315) or may be partially adhered. Further, as shown in FIG. 50, an adhesive tape (315D) for clearly separating the painted portion and the unpainted portion from above the adhesive tape (315C) may be attached. The adhesive tape (315D) for such a purpose is called a parting tape. The parting tape is used as needed even when the masking material (315) is fixed by the adhesive layer (315B).

[0042]

According to the present invention, it is possible to provide a masking material which can be used repeatedly even in a surface treatment having a high-temperature heating step.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is a sectional view of a masking state of the first embodiment.

FIG. 3 is a cross-sectional view of a peeled state of the first embodiment.

FIG. 4 is a perspective view of a second embodiment.

FIG. 5 is a perspective view of a third embodiment.

FIG. 6 is a sectional view of a masking state according to a third embodiment.

FIG. 7 is a perspective view of the third embodiment when integrally molded.

FIG. 8 is a perspective view of a fourth embodiment.

FIG. 9 is a perspective view of a fifth embodiment.

FIG. 10 is a sectional view of a masking state according to a fifth embodiment.

FIG. 11 is a sectional view showing another masking state of the fifth embodiment.

FIG. 12 is a perspective view of the fifth embodiment when integrally molded.

FIG. 13 is a perspective view of a sixth embodiment.

FIG. 14 is a sectional view of a masking state according to a sixth embodiment.

FIG. 15 is a perspective view of a seventh embodiment.

FIG. 16 is a sectional view of a masking state according to a seventh embodiment.

FIG. 17 is a perspective view of an eighth embodiment.

FIG. 18 is a perspective view of a ninth embodiment.

FIG. 19 is a sectional view of a masking state according to a ninth embodiment.

FIG. 20 is a perspective view of a tenth embodiment.

FIG. 21 is a perspective view of an eleventh embodiment.

FIG. 22 is a sectional view of a masking state according to an eleventh embodiment.

FIG. 23 is a perspective view of a twelfth embodiment.

FIG. 24 is a sectional view showing a masking state of the twelfth embodiment.

FIG. 25 is a perspective view of a thirteenth embodiment.

FIG. 26 is a sectional view of a masking state according to a thirteenth embodiment.

FIG. 27 is a perspective view of a fourteenth embodiment. FIGS. 28 to 33 show application examples of the present invention.

FIG. 28 is a perspective view of an automobile body.

FIG. 29 is an explanatory view of part A.

FIG. 30 is an explanatory view of part B.

FIG. 31 is an explanatory view of a part C.

FIG. 32 is an explanatory view of a portion D.

FIG. 33 is an explanatory view of a portion E.

FIG. 34 is a perspective view of the back side of the masking material of the fifteenth embodiment.

35 is a sectional view taken along line AA in FIG.

FIG. 36 is a partial perspective view around the air inlet of the bumper.

FIG. 37 is an explanatory view of a coating state of the fifteenth embodiment.

FIG. 38 is an explanatory diagram of a masking material peeling state according to a fifteenth embodiment.

FIG. 39 is a perspective view of a sixteenth embodiment before a masking material is attached.

FIG. 40 is a sectional view of a sixteenth embodiment in a state where a masking material is attached.

FIG. 41 is a perspective view of a seventeenth embodiment before a masking material is attached.

FIG. 42 shows a state before a masking material is attached in the seventeenth embodiment.
AA sectional view in FIG.

FIG. 43 is a view A- of the masking material mounted state of the seventeenth embodiment.
A sectional view

FIG. 44 is a perspective view of an eighteenth embodiment.

FIG. 45 is a sectional view showing a masking state of the eighteenth embodiment.

FIG. 46 is a perspective view of a nineteenth embodiment.

FIG. 47 is an explanatory view of a coating state of a nineteenth embodiment.

FIG. 48 is an explanatory view of a masking material peeling state according to a nineteenth embodiment.

FIG. 49 is an explanatory view of a state in which a masking material is fixed with an adhesive tape.

FIG. 50 is an explanatory view showing a state in which a parting tape is further attached.

[Explanation of symbols]

 31-319 Masking material 31A-319A Main body

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kunori Ito 213-5, Minamishibata-cho, Tokai City, Aichi Prefecture 5 Nagoya Yuka Co., Ltd. F-term (reference) 4D073 AA01 BB03 DB03 DB08 DB13 DB32 DB36 4J001 DA01 DB01 DC14 EB37 EC09 FA01 FB03 FC03 FD01 JA17 JA20 4J002 AA01X BB03X BB04X BB06X BB12X BB15X BC022 BD03X BD10X BE04X BF01X BG002 CB00X CF00X CF06X CF07X CF16X CG00X CH07X CH09X CL00X CL03CN03

Claims (2)

[Claims] 1. A compound represented by the following general formula (a): A masking material characterized by using a polyamide comprising a repeating unit represented by the following formula: 2. The following general formula (a): A masking material comprising a polymer alloy containing a polyamide comprising a repeating unit represented by the following formula: