JPH057807A - Masking material - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to reuse a masking material for protecting a predetermined portion during painting. For the above-mentioned purpose, the masking material of the present invention is made of a polyolefin having resistance to a solvent contained in a coating material, and an inorganic filler is mixed to improve heat resistance and strength. In order to prevent the paint adhering to the surface of the masking material from coming off during reuse and contaminating the surroundings, the surface of the masking material is subjected to a primer treatment.

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 that the predetermined position of the member is not coated with the coating.

[0002]

2. Description of the Related Art A masking material is provided with a pressure-sensitive adhesive layer on the masking material if the portion to be protected is planar, and is attached to the portion through the pressure-sensitive adhesive layer, and if it is a hole, it is inserted into the masking material. It is attached by providing a portion and inserting the insertion portion, and if it is plate-like, it is attached by providing a fitting groove in the masking material and fitting the fitting groove in the portion, and it may be a convex shape. For example, it is attached by forming a fitting portion on the masking material and fitting the portion to the fitting portion. Then, the masking material is removed from the respective portions after the surface treatment.

As such a masking material, there has conventionally been provided a material made of a thermoplastic material mixed with an inorganic filler (Japanese Patent Laid-Open No. 126966/1990).
Among the thermoplastic materials, particularly polyolefin is rich in solvent resistance, and by mixing an inorganic filler, the polyolefin is mechanically reinforced, and further the thermal conductivity is increased and the heat resistance is also improved. The masking material can be reused.

[0004]

However, in the above-mentioned conventional masking material, the paint adheres to the surface of the masking material during coating to form a coating film, but the polyolefin has an affinity with the coating film. If it is reused with the coating film adhered, the pieces of the coating film may peel off from the surface of the masking material and contaminate the surroundings. However, it is extremely troublesome to peel off the coating film from the masking material each time it is reused, and it is necessary to apply the masking material to the coating process in a mass production line such as a production line of automobiles and home appliances. There was a big obstacle to reuse.

[0005]

As a means for solving the above-mentioned conventional problems, the present invention is to apply a primer treatment to the surface of a polyolefin mixed with an inorganic filler as a material for a masking material.

The polyolefin used in the present invention is, for example, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer and the like.

The inorganic filler to be filled in the above polyolefin is calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfite, magnesium hydroxide, aluminum hydroxide, magnesium oxide, titanium oxide, iron oxide, zinc oxide, alumina, silica. Inorganic powder such as diatomaceous earth, dolomite, gypsum, talc, clay, asbestos, mica, glass fiber, calcium silicate, bentonite, white carbon, carbon black, iron powder, aluminum powder, stone powder, blast furnace slag, fly ash Is. And the inorganic filler is usually added to the above-mentioned polyolefin.
-80% by weight, preferably about 10-60% by weight.

As the primer used for the primer treatment applied to the surface of the polyolefin mixed with the above-mentioned inorganic filler, chlorinated polypropylene, modified polyolefin or olefin copolymer such as ethylene-vinyl acetate copolymer, styrene-butadiene rubber, Acrylonitrile-butadiene rubber, chloroprene rubber, synthetic rubber such as polybutadiene, acrylic synthetic resin, vinyl synthetic resin, acrylic synthetic resin containing amino group, amide group, etc., vinyl synthetic resin, amino synthetic resin or epoxy Synthetic rubber such as resin or synthetic resin based primer,
Or aluminum isopropylate, aluminum alcoholate or aluminum chelate compound such as aluminum trisacetylacetonate, 2-ethylhexyl lead, alkyl metal such as hexadecyl lithium, dibutyltin diacetate, organotin compound such as di-n-butyltin dioxide, methyl. Silane compounds such as vinyldichlorosilane, metal complex salts of 1,3-dicarbonyl such as lithium acetylacetone and beryllium acetylacetone, organic titanium compounds such as tetrabutyl titanate, boric acid such as tri-n-butyl borate and triphenyl borate. Compounds, trioleyl phosphate, tridecyl phosphate and other phosphate esters, magnesium stearate, carboxylic acid metal salts such as cobalt naphthenate, and n-dodecyl mercapto potassium salt Genus thioalcoholates, thiodicarboxylates such as zinc 2-ethylhexanedithioate, nickel dimethyldithiocarbamate, metal salts of dithiocarbamate such as copper dimethyldithiocarbamate, metal salts of sulfonate such as nickel benzenesulfonate, vanadium dibutyl phosphate, etc. There are low molecular weight primers such as metal salts of organic phosphates, and the above primers are used as one kind or as a mixture of two or more kinds. As the above-mentioned primer, a synthetic resin or rubber having good adhesiveness to both a paint vehicle of polyolefin or a synthetic resin other than polyolefin generally used as an adhesive, or the above-mentioned various primers is used. Particularly desirable as the primer is an acrylic synthetic resin or an amino synthetic resin containing a quaternary ammonium salt. In order to perform the primer treatment using one or a mixture of two or more of the above-mentioned various primers, a solution or emulsion (latex) of one or a mixture of two or more of the above-mentioned various primers is used as a material for the masking material. Apply to the surface and dry. Prior to the primer treatment, the surface of the polyolefin may be subjected to an affinity treatment. As the affinity treatment applied to the surface of the polyolefin, there are a flame treatment and a sulfuric acid treatment for slightly carbonizing the surface to give affinity, and a corona discharge treatment for roughening and slightly carbonizing the surface.

In order to manufacture a masking material from a polyolefin mixed with the above-mentioned inorganic filler, a method of forming a film or sheet into a predetermined shape by vacuum forming is usually the most suitable method for mass production. Alternatively, press molding, blow molding, injection molding or the like may be applied. The above-mentioned primer treatment is preferably performed before molding the masking material, but may be performed after molding the masking material.

The above masking material may be colored by coloring with a pigment or dye for identifying the masking site, and further, flame retardant, flame retardant, insect repellent, preservative, antiaging agent, ultraviolet absorber, A third component such as a foaming agent such as a chemical foaming agent or a capsule-type foaming agent may be added to the composition. These third components may be added alone or in admixture of two or more.

[0011]

When the above-mentioned polyolefin is mixed with an inorganic filler, the polyolefin is mechanically reinforced and the thermal conductivity becomes high. Therefore, even when exposed to a high temperature of about 150 ° C., the masking material hardly deforms. Further, when the used masking material is incinerated, the combustion energy is reduced by the amount of the inorganic filler mixed. Further, since the surface of the masking material is subjected to a primer treatment, the adhesion of the coating film is improved and the peeling hardly occurs.

[0012]

Therefore, in the present invention, even if a masking material is used for coating including a heating step, the masking material can be reused without causing deformation, and waste of the plastic material is prevented. Further, since the combustion energy generated when the used masking material is incinerated is reduced, damage to the incinerator is reduced. When it is reused, the coating film attached to the surface of the masking material is not peeled off to contaminate the surroundings.

[0013]

【Example】

Masking Material A Masking Material A is applied to the flat portion of the member that should not be coated.

1 to 3 show a first embodiment of the present invention. In the figure, the masking material (31) is a primer prepared by applying a flame treatment to the surface of a polypropylene sheet mixed with 30% by weight of talc, then applying a 40% by weight solution of ethylene-vinyl acetate copolymer in toluene and drying. A rectangular box-shaped main body (31) A produced by vacuum forming after treatment (31) D, and an adhesive layer (31) B formed on the lower surface of the main body (31) A. The adhesive layer (31) B is covered with a releasable sheet (31) C such as polyethylene film, polypropylene film or release paper. Thus, in the masking material (31), the adhesive layer (31) B is a release sheet (3
1) Can be stacked because it is protected by C, transport,
It is convenient for storage.

As shown in FIG. 2, the masking material (31) is adhered to the part (2) of the member (1) which should not be coated with a flat sheet after the release sheet (31) C is peeled off. Protect. Then, the paint is spray-painted 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, as shown in FIG. 3, for example.
The masking material (31) of this example is composed of a polypropylene sheet mixed with 30% by weight of talc as described above,
Therefore, the masking material (31) can be reused without being deformed even after the heat treatment.

The surface of the masking material (31) is treated with a primer (31) D with an ethylene-vinyl acetate copolymer.
Adhesion between the coating film (4) and the surface of the masking material (31) is good, and the coating film is reusable.
(4) Pieces do not peel off and contaminate the surrounding area.

FIG. 4 shows a second embodiment of the present invention.
In the masking material (32) of the present embodiment, a main body (32) A made of a polypropylene sheet mixed with 35% by weight of calcium carbonate has a cylindrical container shape, and the lower surface of the main body (32) A has an adhesive layer (32). B is formed, the adhesive layer (32) B is covered with a release sheet (32) C, and the masking material (32) is sprayed with a 20 wt% toluene solution of chlorinated polypropylene after molding. The primer treatment (32) D is performed by drying. The masking material (32) is used to protect the flat part of the member, like the masking material (31) of the first embodiment, and a hole may be provided in this part. It can be reused like the masking material of the first embodiment, and there is no contamination of the surroundings due to peeling of the coating film piece upon reuse.

FIG. 5 and FIG. 6 show a third embodiment of the present invention. In the figure, the masking material (33) is 40% by weight.
It is made by applying epoxy resin to the surface of a polypropylene sheet mixed with gypsum powder, applying a primer treatment by curing and drying (33) F, and then vacuum-forming it. And a collar portion (33) B provided around the upper edge of the main body (33) A and an adhesive layer (33) C formed on the lower surface of the main body (33) A, the adhesive layer (33) C being separated from each other. Type sheet (3
3) Covered by D. The masking material (33) is also applied to the flat plate-like portion (2) of the member (1) like the masking material (31) of the first embodiment, but as shown in FIG. Since the coating film (4) is cut by the collar portion (33) B of the masking material (33), the masking material (33) can be easily detached by an operator's hand without being disturbed by the coating film (4). And the first
It can be reused like the masking material of the example, and there is no contamination of the surroundings due to peeling of the coating film piece upon reuse. The masking material (33) is treated with the primer as shown in FIG.
It is desirable that a plurality of masking materials (33) be arranged vertically and horizontally from a polypropylene sheet coated with (33) F and be integrally vacuum-formed. In this case, the brim (3
3) A groove or a groove (33) E is provided on one side or both sides of B so that the individual masking materials (33) can be easily torn off by hand. The notch or groove (33) E of the collar portion (33) B is a masking material (33).
May be integrally formed at the time of vacuum forming, or may be separately formed after vacuum forming.

FIG. 8 shows a fourth embodiment of the present invention. The masking material (34) of the present embodiment is corona discharge treated on the surface of a polypropylene sheet mixed with 40% by weight of talc, and then the following amino A rectangular box-shaped body (34) A with a rectangular box-shaped handle (34) D standing upright from the bottom, which is manufactured by vacuum forming after applying primer treatment (34) E with a system-based synthetic resin. , The adhesive layer (34) B formed on the lower surface of the main body (34) A, and the adhesive layer (34) B is a release sheet (3
4) Covered by C. The amino synthetic resin used in this example is manufactured as follows.
The following composition is polymerized by heating to 75 ° C. in a reactor equipped with a thermometer, a stirrer and a condenser and stirring for 8 hours. Dimethylaminoethyl methacrylate 20 parts by weight Ethyl acrylate 20 parts by weight Azobis isobutyronitrile 0.2 parts by weight Ethyl acetate 60 parts by weight After polymerization, the dimethylaminoethyl group contained in the obtained copolymer is quaternized with acetic acid. To form a quaternary ammonium salt.
The masking material (34) is used in the same manner as in the first embodiment, but since it has the grip portion (34) D, it is extremely easy to attach and detach. It can be reused like the masking material of the first embodiment, and there is no contamination of the surroundings due to peeling of the coating film piece upon reuse.

Masking Material B The masking material B is applied to the flat portions and convex portions of the member which should not be coated.

9 and 10 show a fifth embodiment of the present invention. In the figure, the masking material (35) is 35% by weight
Polyethylene sheet mixed with the above-mentioned calcium carbonate was subjected to corona discharge treatment, then subjected to a primer treatment (35) G with the same amino-based synthetic resin as in the fourth embodiment, and then vacuum-formed to produce a rectangular container. Body (35)
A and the collar portion (35) B formed on the outer periphery of the upper edge of the body (35) A
And a pressure-sensitive adhesive layer (35) C formed on the upper surface of the collar portion (35) B. The pressure-sensitive adhesive layer (35) C is covered with a release sheet (35) D. As shown in FIG. 10, the masking material (35) is prepared by peeling off the release sheet (35) D to form a flange (35) B and an adhesive layer (35) C on the upper surface.
Part of the member (1) that should not be coated with a flat plate
Stick it on (2). After the coating film (4) is formed by painting, the masking material (35) is removed by the hand of the operator. The portion (2) may be provided with a hole.
Further, as shown in FIG. 11, the masking material (35) of the present embodiment is adhered to the convex portion (21) of the surface of the member (1) to form the convex portion (2).
1) may be protected. Since the masking material (35) of this embodiment is composed of a polyolefin sheet mixed with an inorganic filler, it is not deformed by heat during the surface treatment and can be reused after being removed. Further, since the surface of the masking material (35) is subjected to the primer treatment (35) G, the adhesion between the coating film (4) and the masking material (35) surface is good, and the coating film ( 4) Pieces do not peel off and contaminate the surrounding area.

In the method of manufacturing the masking material (35) of the present embodiment, what is especially admired is that a plurality of masking materials (35) are arranged vertically and horizontally from the polyethylene sheet as shown in FIG. It is desirable to mold. In this case, make a notch (35) E in the release sheet (35) D, and correspondingly make a notch or groove (35) F on one or both sides of the brim (35) B of the masking material (35). It is provided so that the individual masking materials (35) can be easily torn off by hand. The notch or groove (35) F of the collar portion (35) B may be integrally formed during vacuum forming of the masking material (35), or may be separately formed after vacuum forming.

13 and 14 show a sixth embodiment of the present invention. In the figure, the masking material (36) is a polypropylene sheet mixed with 37% by weight of talc, subjected to corona discharge treatment, coated with an epoxy resin, cured and dried, and then subjected to primer treatment (36) F and vacuum forming. It is manufactured by
6) A and the collar portion (36) B formed on the outer periphery of the upper edge of the main body (36) A
And a bent portion (36) E formed on the outer periphery of the collar portion (36) B.
And a pressure-sensitive adhesive layer (36) C formed on the upper surface of the collar portion (36) B, the release layer (36) D is coated on the pressure-sensitive adhesive layer (36) C. The masking material (36) is peeled off from the release sheet (36) D, and the adhesive layer (36) C on the upper surface of the collar portion (36) B is used, for example, a member
It is attached to the portion (2) having the hole (22) of (1), and then the coating film (4) is formed by painting as shown in FIG.
Since the coating film (4) is cut by the bent portion (36) E of the collar portion (36) B of the masking material (36), the masking material (36) is disturbed by the coating film (4). It can be easily detached by hand without using. It can be reused like the masking material of the fifth embodiment, and there is no contamination of the surroundings due to peeling of the coating film piece upon reuse. The hole (22) does not have to exist 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.

15 and 16 show a seventh embodiment of the present invention. The masking material (37) of this example was subjected to corona discharge treatment on the surface of a polypropylene sheet mixed with 30% by weight of calcium carbonate, and then subjected to primer treatment (37) C using the amino synthetic resin of the fourth example. Manufactured by vacuum forming, the masking material (37) includes a container upper insertion part (37) A and a flange part (37) B formed on the outer periphery of the upper edge of the insertion part (37) A. Consists of. The masking material (37) is inserted into the hole (22) of the member (1) as shown in FIG.
The inside of the hole portion (22) is protected by being inserted through, and the periphery of the hole portion (22) is further protected by the collar portion (37) B. The masking material (37) is inserted into the hole (22) and then coated to form a coating film (4) as shown in FIG. 16. The inside of the hole (22) and the periphery of the hole (22) are formed. The coating film (4) is not formed on the film. Then, the masking material (37) is usually removed by the hand of the operator after the heat treatment of the coating film (4), but since the masking material (37) is made of a polyolefin sheet mixed with an inorganic filler, the heat treatment is performed. It does not deform and can be reused. Further, since the surface of the masking material (37) is subjected to the primer treatment (37) C, the adhesion between the coating film (4) and the masking material (37) surface is good, and the coating film ( 4) Pieces do not peel off and contaminate the surrounding area.

FIG. 17 shows an eighth embodiment of the present invention. The masking material (38) of this embodiment is made of a polypropylene sheet which has been subjected to the same primer treatment (38) D as in the seventh embodiment, and the container-like insertion portion (38) in which the handle portion (38) C is erected from the bottom. A and a collar portion (38) B formed on the outer periphery of the upper edge of the insertion portion (38) A. The masking material (38) is used in the same manner as in the seventh embodiment, but since it has the grip portion (38) C, it can be attached and detached very easily to the hole portion. It can be reused like the masking material of the seventh embodiment, and there is no contamination of the surroundings due to peeling of the coating film piece upon reuse.

18 and 19 show the ninth embodiment of the present invention. The masking material (39) of the present embodiment is a cylindrical container-like insertion portion (39) A made of a polypropylene sheet which has been subjected to the same primer treatment (39) D as in the seventh embodiment, and the insertion portion (39) A. Collar portion (39) B formed on the upper edge and the collar portion (39)
It consists of a rising part (39) C that stands up from the outer circumference of B. The masking material (39) is inserted into the hole portion (22) of the member (1) through the insertion portion (39) A as in the seventh embodiment, but is erected from the outer periphery of the collar portion (39) B. As shown in FIG. 19, the coating film (4) is cut by the rising portion (39) C thus formed, and thus the masking material (3
The exit of 9) is done smoothly. It can be reused like the masking material of the seventh embodiment, and there is no contamination of the surroundings due to peeling of the coating film piece upon reuse.

FIG. 20 shows a tenth embodiment of the present invention. The masking material (310) of the present embodiment is a cross-shaped container-like insertion portion (310) A made of a polypropylene sheet subjected to the same primer treatment (310) D as in the seventh embodiment, and the insertion portion (31).
The flange portion (310) B is formed at the upper edge of 0) A, and the peripheral wall portion (310) C is provided upright from the outer periphery of the flange portion (310) B. The masking material (310) is used in the same manner as in the ninth embodiment, except that the insertion part
Since the (310) A is cruciform, the outer periphery of the insertion part (310) A only partially contacts the inner wall of the hole, so it is easy to attach and detach, and the material is saved compared to the cylindrical container. It And the seventh
It can be reused like the masking material of the example, and there is no contamination of the surroundings due to peeling of the coating film piece upon reuse.

21 and 22 show the eleventh embodiment of the present invention. The masking material (311) of this example is the seventh
A container-like insertion part (311) A made of a polypropylene sheet subjected to the same primer treatment (311) I as in the example, and an upper flange part (311) B formed at the upper edge of the insertion part (311) A. And the upper collar part
(311) Peripheral wall portion (311) C hanging from the peripheral edge of B and the peripheral wall portion (31
1) C lower collar part (311) D extended from the lower edge of C and the main body (311) A
The handle portion (311) E protruding from the center of the bottom surface and the main body (31
1) Ribs (3 formed on the bottom surface of A and the upper collar portion (311) B (3)
11) F and (311) G, which are used in the same manner as in the eighth embodiment, but as shown in FIG. 22, for example, the coating film (4) applied to the member (1) is cut at the peripheral wall (311) ) C The lower collar portion (311) D extended from the lower edge is more completely carried out, so that the masking material (311) is detached from the hole portion (22) more completely. Further, since the masking material (311) is reinforced by the ribs (311) F and (311) G of the insertion portion (311) A bottom surface and the upper collar portion (311) B, it is difficult to be crushed or destroyed. It can be reused like the masking material of the seventh embodiment, and there is no contamination of the surroundings due to peeling of the coating film piece upon reuse.

23 and 24 show a twelfth embodiment of the present invention. The masking material (312) of this embodiment is the seventh
A cylindrical container-shaped insertion portion (312) A formed of a polypropylene sheet subjected to the same primer treatment (312) D as in the example and having vertical ribs (312) C formed on the outer periphery, and the insertion portion (312) A upper edge And a collar portion (312) B formed on the. The masking material (312) is the same as in the seventh embodiment, as shown in FIG.
The vertical ribs (3) of the masking material (312)
12) Since C is elastically pressed against the inner wall of the hole (22), it does not fall off before or during coating due to vibration, etc., and the vertical rib (312) C prevents the masking material (312) from falling off. Reinforced. It can be reused like the masking material of the seventh embodiment, and there is no contamination of the surroundings due to peeling of the coating film piece upon reuse.

Masking Material D The masking material D is applied to the eaves-like portion of the member which should not be surface-treated.

A thirteenth embodiment of the present invention is shown in FIGS. The masking material (313) of this example is No. 7
From a cylindrical container-shaped main body (313) A made of a polypropylene sheet subjected to the same primer treatment (313) C as in the example, and a fitting groove (313) B provided from the open end of the main body (313) A. Become. The masking material (313) is fitted to the eaves-like portion (23) of the member (1) through the fitting groove (313) B as shown in FIG. 26 to protect the portion (23) from painting. , A coating film on the part (23)
(4) is not formed. After the treatment, the masking material (313) is manually separated from the portion (23). It can be reused like the masking material of the seventh embodiment, and there is no contamination of the surroundings due to peeling of the coating film piece upon reuse.

FIG. 27 shows a fourteenth embodiment of the present invention. The masking material (314) of this embodiment is a rectangular box-shaped main body (314) A made of a polypropylene sheet subjected to the same primer treatment (314) C as in the seventh embodiment, and the open end of the main body (314) A. And a fitting groove (314) B provided in the same manner as in the thirteenth embodiment. It can be reused like the masking material of the seventh embodiment, and there is no contamination of the surroundings due to peeling of the coating film piece upon reuse.

28 to 33, the masking material A,
An example is shown in which B, C, and D are applied to the rust-proof, sound-proof and vibration-proof treatment of the underfloor (12) of the automobile body (11). In FIG. 28, the masking material of the present invention is used for A, B, C, and
Used for each part of D and E. That is, in FIG. 29, the hole (22) A in the portion A is a hole for inserting the spring shaft of the front wheel, and the periphery of the hole (22) A is the seat of the spring. The inside of and around the hole (22) A is protected by using the masking material (37) of the embodiment, and the component mounting bolt (21) A at the B portion in FIG. 30 belongs to the masking material B, for example, the sixth embodiment. The bolt (21) A is protected by using the masking material (36) of the example, and the draining hole (22) C of the portion C in FIG. 31 belongs to the masking material C, for example, the masking material (38) of the eighth embodiment. ) Using the drainage hole
(22) The inside of the C is protected, and in FIG. 32, the bracket for mounting parts (23) D in FIG. 32 has the masking material (3
13) to protect the bracket (23) D, and in FIG. 33, the component mounting screw hole (22) E in FIG. 33 is provided with, for example, the masking material (31) of the first embodiment belonging to the masking material A. Is used to protect the inside of the screw hole (22) E.

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) was subjected to corona discharge treatment on the surface of a polypropylene sheet mixed with 35% by weight of talc, and then subjected to primer treatment (315) F using the amino synthetic resin of the fourth embodiment. It is manufactured by vacuum forming, and includes a main body (315) A and an adhesive layer (315) B formed on the outer peripheral edge of the main body (315) A. The recess to which the masking material (315) is applied is shown in FIG. In the figure, (24) is an air intake under the bumper (13), and a pair of support posts (24) A are provided inside the air intake (24).
, (24) A, vertical rail (24) B, and horizontal rail (24) C. The masking material (315) is such an air intake (2
Proper fitting groove (315) C, (31
5) C, a vertical rail fitting groove (315) D, and a horizontal rail fitting groove (315) E are provided. The adhesive layer (315) B may be covered with a release sheet or a protective film. Masking material
(315) The release sheet is peeled off before use.
The masking material (315) is fitted inside the air intake (24) as shown in FIG. 37.
The columns (24) A and (24) A of the air intake (24) are fitted into the column fitting grooves (315) C and (315) C of 5), and the vertical and horizontal beam fitting grooves (3
15) D and (315) E are fitted with vertical rails (24) B and horizontal rails (24) C, and the masking material main body (315) A is attached via the adhesive layer (315) B.
The peripheral surface of the is closely attached to the air intake port (24). In this way, the masking material (315) A fits and closely contacts the inner shape of the air intake port (24). Masking material (315) for air intake
(24) After fitting inside, spray as shown in FIG. 37.
(5) is sprayed with paint to coat the periphery of the air intake port (24) and then heated to form a coating film (4) which is protected by a masking material (315). It is not formed inside the inlet (24). After 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. Since the masking material (315) is composed of a polyolefin sheet mixed with an inorganic filler, it can be reused without being deformed by heating after coating. Further, since the surface of the masking material (315) is subjected to the primer treatment (315) F, the adhesion between the coating film (4) and the masking material (315) surface is good, and the coating film ( 4) Pieces do not peel off and contaminate the surrounding area.

39 and 40 show a sixteenth embodiment of the present invention. The masking material 316 of this embodiment is used to protect a plurality of convex portions of the member. The masking material (316) was treated with the same primer (3) as in the fifteenth embodiment.
16) A main body (316) A, which is a vacuum-formed product of a polypropylene sheet coated with C, and a fitting portion (3) protruding from the main body (316) A.
It consists of 16) B and (316) B. The masking material (316) is a member
As shown in FIG. 40, a plurality of convex portions (25) which should not be subjected to the surface treatment of (1) are attached through the fitting portions (316) B and (316) B, as shown in FIG. ) To protect. It can be reused like the masking material of the fifteenth embodiment, and there is no contamination of the surroundings due to peeling of the coating film piece upon reuse.

41 to 43 show a seventeenth embodiment of the present invention. The masking material (317) of this embodiment is used to protect the flat portion of the member. The masking material (3
17) is composed of a main body (317) A made of a polypropylene sheet subjected to the same primer treatment (317) D as in the fifteenth embodiment, and an adhesive layer (317) B formed on the back surface of the main body (317) A. Becomes
The adhesive layer (317) B is covered with a release sheet (317) C. As shown in FIG. 42, the masking material (317) is prepared by removing the releasable sheet (317) C from the window (14) periphery (2) of the automobile (13).
It is attached to 7) via an adhesive layer (317) B. Then car
Paint (13) and heat to form coating (4). After coating, when the masking material (317) was peeled off from the peripheral edge (27) of the window (14), the peripheral edge (27) of the window (14) was protected by the masking material (317) during coating. The coating film (4) is not formed on the peripheral edge (27) and the masking material (317) is made of a polypropylene sheet mixed with an inorganic filler so that it can be reused without being deformed by heating after coating. .
Then, similar to the masking material of the fifteenth embodiment, peeling of the coating film piece does not cause contamination of the surroundings upon reuse.

[0038]

[Brief description of drawings]

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

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

FIG. 3 is a sectional view showing 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 of the 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 fifth embodiment in a masking state.

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

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

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

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

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

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

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

FIG. 18 is a ninth perspective view.

FIG. 19 is a sectional view of a masking state of the 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 the eleventh embodiment in a masking state.

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

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

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

FIG. 26 is a sectional view of the thirteenth embodiment in a masking state.

FIG. 27 is a perspective view of a fourteenth embodiment FIGS. 28 to 33 show an application example 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 diagram of section B

FIG. 31 is an explanatory diagram of part C

FIG. 32 is an explanatory view of section D

FIG. 33 is an explanatory diagram of part E

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

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

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

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

FIG. 38 is an explanatory view of the masking material peeling state of the fifteenth embodiment.

FIG. 39 is a perspective view of the 16th embodiment.

FIG. 40 is a sectional view of the 16th embodiment in a masking state.

FIG. 41 is a perspective view of the seventeenth embodiment.

FIG. 42 is a drawing for explaining the coating state of the seventeenth embodiment.

FIG. 43 is an explanatory diagram of the peeling state of the masking material according to the 17th embodiment.

[Explanation of symbols]

(31) Masking material (31) A body (31) D Primer treatment

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[Procedure amendment]

[Submission date] July 7, 1992

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

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

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

FIG. 3 is a sectional view showing 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 of the 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 fifth embodiment in a masking state.

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

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

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

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

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

FIG. 16 is a sectional view of a masking state of the 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 of the 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 the eleventh embodiment in a masking state.

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

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

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

FIG. 26 is a sectional view of the thirteenth embodiment in a masking state.

FIG. 27 is a perspective view of a fourteenth embodiment FIGS. 28 to 33 show an application example 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 diagram of section B

FIG. 31 is an explanatory diagram of part C

FIG. 32 is an explanatory view of section D

FIG. 33 is an explanatory diagram of part E

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

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

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

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

FIG. 38 is an explanatory view of the masking material peeling state of the fifteenth embodiment.

FIG. 39 is a perspective view of the 16th embodiment.

FIG. 40 is a sectional view of the 16th embodiment in a masking state.

FIG. 41 is a perspective view of the seventeenth embodiment.

FIG. 42 is a drawing for explaining the coating state of the seventeenth embodiment.

FIG. 43 is an explanatory diagram of the peeling state of the masking material according to the 17th embodiment.

[Explanation of symbols] (31) Masking material (31) A body (31) D Primer treatment

Claims (8)

[Claims] 1. A masking material characterized by using a polyolefin mixed with an inorganic filler as a material, the surface of which is treated with a primer. 2. The masking material according to claim 1, comprising a container-shaped main body and an adhesive layer formed on the lower surface of the main body. 3. The masking material according to claim 1, comprising a container-shaped main body, a flange portion formed on an outer periphery of an upper edge of the main body, and an adhesive layer formed on an upper surface of the flange portion. 4. The masking material according to claim 1, comprising a container-shaped insertion portion and a flange portion formed on an outer periphery of an upper edge of the insertion portion. 5. The masking material according to claim 1, comprising a container-shaped main body and a fitting groove provided from an opening end of the main body. 6. The masking material according to claim 1, wherein the masking material has a shape that fits properly into the inner shape of the recess to be protected. 7. The masking material according to claim 6, wherein an adhesive layer is formed on all or part of the surface of the masking material that contacts the inside of the recess. 8. The masking material according to claim 1, wherein one or more fitting portions having a shape that conforms to the convex portion to be protected are formed.