WO2012043152A1 - マスキング材、マスキング材の製造方法およびマスキング方法 - Google Patents
マスキング材、マスキング材の製造方法およびマスキング方法 Download PDFInfo
- Publication number
- WO2012043152A1 WO2012043152A1 PCT/JP2011/070135 JP2011070135W WO2012043152A1 WO 2012043152 A1 WO2012043152 A1 WO 2012043152A1 JP 2011070135 W JP2011070135 W JP 2011070135W WO 2012043152 A1 WO2012043152 A1 WO 2012043152A1
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- WO
- WIPO (PCT)
- Prior art keywords
- masking
- masking material
- peelable protective
- temperature
- resin
- Prior art date
Links
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
- B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
- B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
- B05B12/24—Masking elements, i.e. elements defining uncoated areas on an object to be coated made at least partly of flexible material, e.g. sheets of paper or fabric
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0205—Magnetic circuits with PM in general
- H01F7/021—Construction of PM
- H01F7/0215—Flexible forms, sheets
Definitions
- the present invention relates to a masking material for masking a portion where a paint is not desired to be applied during coating, a method for manufacturing the masking material, and a masking method.
- a masking tape is generally used for masking a portion where a paint is not desired to be applied during painting.
- the masking tape is composed of a tape base material, an adhesive layer, and a release paper.
- the release paper is peeled off, and the masking tape is applied to the masked portion using the adhesive force of the exposed adhesive layer. Then, it is peeled off from the masked portion after painting and discarded.
- both the release paper and the masking tape after painting are wastes to be discarded, which is a waste of resources.
- the masking tape that has been applied once is peeled off and then reapplied, it may not be possible to reapply due to a decrease in the adhesive strength of the adhesive layer.
- a desired adhesive strength cannot be obtained unless the oil content in the masked portion is removed.
- Patent Documents 1 and 2 propose using a sheet containing magnetic powder as a masking sheet. According to such a masking sheet, it is possible to save the masking work by using magnetic force.
- the masking sheet described in Patent Document 1 is chlorinated polyethylene, nitrile rubber (NBR), ethylene-propylene-diene rubber (EPDM), chlorinated polyethylene (CPE), ethylene-vinyl acetate copolymer (EVA), chlorinated.
- soft plastics such as sulfonated polyethylene and soft vinyl chloride are used as the main resin component, the heat resistance is low.
- the masking sheet is deformed or melted. In particular, when the masking sheet is melted, the masking sheet is fused to the masked portion, and the masked portion is contaminated.
- the masking sheet described in Patent Document 2 has heat resistance by using a resin composed of an ethylene-methyl acrylate copolymer and an ethyl acrylate polymer as a main resin component.
- a resin composed of an ethylene-methyl acrylate copolymer and an ethyl acrylate polymer as a main resin component.
- the paint adhering to the masking sheet is not easily peeled off, if the masking sheet is repeatedly used, the thickness of the coating film adhering to the masking sheet increases and cannot be used for masking.
- the present invention has been made in view of such a situation, and uses a masking material that is excellent in heat resistance and can be used repeatedly, a method for producing such a masking material, and such a masking material.
- An object is to provide a masking method.
- the present invention is a masking material used under a heating step, and a resin having a melting point higher than the temperature of the heating step as a main resin component,
- a masking material comprising: a base material containing a magnetic material having a Curie temperature higher than a temperature; and a peelable protective layer made of a peelable protective material formed on one surface of the base material.
- this invention is a masking material used under a heating process, Comprising: Resin which has melting
- a masking material comprising a base material containing a magnetic material, wherein a peelable protective material is applied on one side of the base material at any stage before coating (Invention 2).
- the base material of a masking material uses resin which has melting
- the magnetic body contained in the base material has a Curie temperature higher than the temperature of the heating process, the magnetic force is reduced during the heating process, and the masking material does not leave the masked portion.
- the paint attached to the masking material can be removed by peeling the peelable protective layer (peelable protective material) from the substrate after painting. By repeating re-formation (re-coating), the masking material can be used repeatedly.
- the resin is preferably a polyamide resin (Invention 3).
- the peelable protective material is preferably a sealer material or a strippable paint (Invention 4).
- the dimensional change rate in the masking surface direction by the heating step is preferably 1.0% or less (Invention 5).
- the magnetic fixing force to the stainless steel plate is preferably 3 to 20 N / 40 mm (Invention 6).
- the present invention is a method for producing a masking material used under a heating step, wherein a resin having a melting point higher than the temperature of the heating step is a main resin component, and the curie is higher than the temperature of the heating step.
- a method for producing a masking material characterized in that a substrate containing a magnetic material having a temperature is produced, and a peelable protective material is applied on one side of the substrate at any stage before coating ( Invention 7).
- the base material is preferably formed by injection molding (Invention 8).
- the present invention relates to a masking method for masking a member containing a magnetic material in a painting operation including a heating step, wherein a resin having a melting point higher than the temperature of the heating step is a main resin component And a base material containing a magnetic material having a Curie temperature higher than the temperature of the heating step, wherein the base material magnetized by the magnetic material is magnetically fixed to a masked portion, and is optionally coated before coating.
- a peelable protective material is applied to the surface of the base material to form a masking material having a peelable protective layer, and after coating, the masking material is removed from the masked portion, and at any stage after painting.
- the masking method is characterized by peeling the peelable protective layer from the surface of the base material in the masking material (Invention 9).
- the masking target may be a steel sheet for automobile after undercoating (Invention 10).
- the masking material according to the present invention is excellent in heat resistance and can be used repeatedly. Moreover, according to the manufacturing method of the masking material which concerns on this invention, the above masking materials can be manufactured. Furthermore, according to the masking method of the present invention, the masking material can be used repeatedly.
- the masking material 1 As shown in FIG. 1, the masking material 1 according to this embodiment includes a base material 2 and a peelable protective layer 3 formed on one surface (upper surface in FIG. 1) of the base material 2. .
- This masking material 1 is used in a heating process, for example, a heat curing process (baking process) of a paint.
- the base material 2 contains a resin having a melting point higher than the temperature of the heating process as a main resin component. By using such a resin, even if the masking material 1 is used under a heating process, the base material 2 is not deformed or melted, and the masking material 1 has excellent heat resistance. It can be used repeatedly.
- the “main resin component” in this specification refers to a main resin component among the resins constituting the base material.
- the resin constituting the base material 2 may consist of only the main resin component described above, or may be a mixture of the main resin component and another resin as long as the heat resistance of the base material 2 is not adversely affected. Also good.
- the temperature of the heating step such as the coating baking step is usually 120 to 160 ° C.
- a resin having a melting point higher than that temperature may be used, preferably 170 ° C. or higher, particularly preferably 180 ° C. or higher, Preferably, a resin having a melting point of 200 ° C. or higher is used.
- nylon resins such as nylon 4, nylon 6, nylon 46, nylon 66, nylon 610, nylon 69, nylon 612, nylon 1212, nylon 11, nylon 12, nylon MXD6, nylon 6T, and the like.
- a polyamide resin excellent in dimensional stability and chemical resistance is preferable, and nylon 6 is particularly preferable.
- the melting point of polyamide resin is generally 170 ° C. or higher, and the melting point of nylon 6 is about 220 ° C.
- the base material 2 contains the above-mentioned resin as a main resin component and contains a magnetic material having a Curie temperature higher than the temperature of the heating step.
- the magnetic material is magnetized, so that the masking material 1 can be magnetically fixed to a member containing a magnetic material such as a steel plate or steel material. Thereby, it is possible to easily attach the masking material 1 to the masked portion and remove the masking material 1 from the masked portion.
- the magnetic material needs to have a Curie temperature higher than the temperature of the heating process.
- the temperature of the heating process such as the paint baking process is usually 120 to 160 ° C. Therefore, the Curie temperature of the magnetic material needs to be higher. This is because if the Curie temperature of the magnetic material is lower than the temperature of the heating step, the magnetic force of the magnetized magnetic material is reduced during the heating step, and the masking material 1 is detached from the masked portion. .
- magnétique materials examples include metals such as iron, nickel and cobalt, and alloys (eg, stainless steel) or oxides thereof, or ferrites such as strontium ferrite, barium ferrite, manganese zinc ferrite, nickel zinc ferrite, and copper zinc ferrite.
- magnetic materials such as an alnico type such as an aluminum-nickel-cobalt alloy and a rare earth type such as a rare earth-transition metal type (eg, SmCo type, SmFeN type, NbFeB type).
- a ferrite type is preferable, and among them, strontium ferrite and barium ferrite are more preferable.
- the shape of the magnetic material a powder shape is preferable.
- the particle diameter is preferably 0.1 to 100 ⁇ m, particularly preferably 0.5 to 20 ⁇ m, and further preferably 0.5 to 3 ⁇ m.
- the content of the magnetic substance in the base material 2 is preferably 300 to 800 parts by weight, particularly preferably 400 to 700 parts by weight, with respect to 100 parts by weight of the resin constituting the base material 2. More preferably, it is 600 parts by mass.
- the base material 2 may contain additives such as a dispersant in addition to the resin and the magnetic material.
- the thickness of the substrate 2 is preferably 1 to 3 mm, particularly preferably 1.5 to 2.0 mm.
- the thickness of the base material 2 is less than 1 mm, the strength as the masking material 1 may be insufficient, and it may be easily deformed at a high temperature.
- the thickness of the base material 2 exceeds 3 mm, the masking material 1 becomes unnecessarily thick and the material cost increases.
- peelable protective material constituting the peelable protective layer 3 a conventionally known sealer material or a strippable paint for automobiles can be used, and preferably a sealer material used for automotive sealing construction is used. it can. In particular, it is preferable to use an excess sealer material (dust sealer) at the time of sealing construction from the viewpoint of cost and effective utilization of materials.
- the peelable protective material is preferably excellent in heat resistance at the temperature of the heating process such as the paint baking process.
- the sealer material is preferably thermosetting, and the peelable protective layer 3 is excellent in heat resistance.
- Specific sealer materials include, for example, a vinyl chloride plastisol mainly composed of a vinyl chloride resin, an acrylic plastisol mainly composed of an acrylic resin, a composition in which a thermosetting material is blended with these plastisols, Examples include a thermosetting resin composition mainly composed of an epoxy resin, a thermosetting resin composition mainly composed of a polyurethane resin, and may be one-component or two-component. There may be. Among the above, from the viewpoint of peelability, heat resistance and workability, a composition in which a thermosetting material is blended with acrylic plastisol is preferable.
- the strippable paint for automobiles may be water-soluble or solvent-based.
- conventionally known ones such as latex type strippable paints such as halogenated hydrocarbons such as vinyl chloride and chloroprene, acrylic emulsion type strippable paints and the like can be used.
- the thickness of the peelable protective layer 3 is preferably 0.3 to 3.0 mm, particularly preferably 0.5 to 2.5 mm, and further preferably 1.5 to 2.0 mm. . If the thickness of the peelable protective layer 3 is less than 0.3 mm, sufficient strength as the peelable protective layer 3 may not be obtained, and when the peelable protective layer 3 is peeled off from the substrate 2 after coating. The peelable protective layer 3 may be torn and difficult to peel off. On the other hand, when the thickness of the peelable protective layer 3 exceeds 3.0 mm, the peelable protective layer 3 becomes unnecessarily thick and the material cost increases.
- the method for forming the peelable protective layer 3 is not particularly limited, and can be formed by applying a peelable protective material by a conventionally known method.
- a coating method such as a psley method, a curtain flow coater method, a roll coater method, a dipping method, and a machine coating by a robot can be used.
- the timing which forms the peelable protective layer 3 is not specifically limited. That is, the peelable protective layer 3 may be formed immediately after the production of the base material 2, or at any stage before painting, for example, before the base material 2 is attached to the masked part, or the base material 2 The peelable protective layer 3 may be formed at the stage of being attached to the masked portion.
- the dimensional change rate in the masking surface direction (in this embodiment, the planar direction of the masking material 1) by the heating process of the masking material 1 is preferably 1.0% or less in both the vertical direction and the horizontal direction, and is 0.5%. It is particularly preferable that the ratio is 0.1% or less. If the dimensional change rate of the masking material 1 is within the above range, it can be said that the dimensional stability of the masking material 1 is excellent, and the masking material 1 having a predetermined size can be used repeatedly.
- a resin constituting the base material 2 may be appropriately selected.
- it can be achieved by selecting a polyamide resin.
- the magnetic fixing force of the masking material 1 to the stainless steel plate is preferably 3 to 20 N / 40 mm, and particularly preferably 4 to 15 N / 40 mm.
- the magnetic fixing force of the masking material 1 is 4 N / 40 mm or more, the masking material 1 can be reliably attached to the masked portion when, for example, an automobile steel plate is to be masked. Further, since the magnetic fixing force of the masking material 1 is 20 N / 40 mm or less, excessive labor is not required when removing the masking material 1 from the masked portion.
- the magnetic fixing force (N / 40 mm) to the stainless steel plate is 100 mm long when the masking material 1 (width 40 mm ⁇ length 150 mm, thickness 1.5 mm) is applied to the stainless steel plate (1.5 mm thickness, SUS430 plate). Affixing (the remaining 50 mm is the gripping part), with the masking material 1 affixed to the stainless steel plate, the masking material 1 and the stainless steel plate are stretched in the opposite directions and in parallel at a speed of 300 mm / min. It is a value measured by pulling in the vertical direction.
- the magnetic force of the masking material 1 is preferably 20 to 100 mT. If the magnetic force of the masking material 1 is 20 mT or more, the masking material 1 can be reliably attached to the masked part (member containing a magnetic body). Further, since the magnetic force of the masking material 1 is 100 mT or less, no excessive labor is required when removing the masking material 1 from the masked portion.
- the magnetic force here refers to a magnetic force measured by a gauss meter at a distance of 1 cm from the surface of the masking material 1.
- the type and content of the magnetic material contained in the base material 2 may be appropriately selected and adjusted.
- the timing which magnetizes the magnetic body used with the base material 2 of the masking material 1 is not specifically limited. That is, the timing for magnetizing the magnetic material may be before compounding the resin of the base material 2 (in this case, the magnetic material magnetized in advance is mixed), or after the base material 2 or the masking material 1 is manufactured. Any stage before being attached to the masked part may be used. In the latter case, the magnetic material can be magnetized by using a known magnetizing / demagnetizing device or the like.
- the masking material 1 includes a plate-like main body portion 10 having a rectangular shape in plan view and two reinforcing rib portions 11 formed on one surface of the plate-like main body portion 10.
- the two reinforcing rib portions 11 are provided in parallel to each other along the longitudinal direction of the plate-like main body portion 10.
- the four corners of the plate-like main body 10 are rounded.
- the reinforcing rib portion 11 is not necessarily required, but is preferably provided when the base material 2 is thin and it is difficult to obtain a preferable strength as the masking material 1. Specifically, it is preferable to provide the reinforcing rib portion 11 when the thickness of the base material 2 (plate-shaped main body portion 10) is less than 2.5 mm, particularly less than 2.0 mm.
- the reinforcing rib 11 can be formed by injection molding simultaneously with the production of the substrate 2 described later.
- the size of the masking material 1 in the planar direction is not particularly limited, and may be set as appropriate according to the size of the masked portion.
- the size of the masking material 1 in the plane direction is preferably 30 to 70 cm ⁇ 120 to 200 cm, particularly 40 to 50 cm. ⁇ 140 to 180 cm is preferable.
- the masking material 1 described above can magnetically fix the masking material 1 to a member (masked portion) containing a magnetic material such as a steel plate or steel material by the magnetic force of the magnetic material contained in the base material 2. it can. Thereby, it is possible to easily attach the masking material 1 to the masked part and to remove the masking material 1 from the masked part, and it can be used repeatedly. Unlike the masking tape, the masking material 1 does not generate dust, can be easily reattached, and does not require degreasing work on the masked portion.
- the base material 2 of the masking material 1 has a resin having a melting point higher than the temperature in the heating process as a main resin component, it has excellent heat resistance and even when used under the heating process, has good dimensional stability. Can be used repeatedly.
- the said magnetic body contained in the base material 2 has Curie temperature higher than the temperature of a heating process, magnetic force falls in the middle of a heating process, and the masking material 1 remove
- the masking material 1 according to the present embodiment has the peelable protective layer 3 on the surface thereof, it is the peelable protective layer 3 to which the paint adheres by painting. Therefore, the paint adhered to the masking material 1 can be removed by peeling off the peelable protective layer 3 from the substrate 2. When the peelable protective layer 3 is peeled from the substrate 2, the peelable protective layer 3 may be formed on the substrate 2 again. Thus, the masking material 1 can be used repeatedly many times by repeating peeling and re-forming of the peelable protective layer 3.
- the manufacturing method of the masking material 1 which concerns on one Embodiment of this invention, and the masking method using the said masking material 1 are demonstrated below.
- the following method is merely an example, and the present invention is not limited to this.
- the masking target is not limited at all as long as it is a member containing a magnetic material such as a steel plate or steel material, and examples thereof include a steel plate for automobiles.
- the masked portion is exemplified by a planar portion of a steel plate for automobile after undercoating, but is not limited thereto.
- the substrate 2 may be manufactured by a conventionally known method such as calendar molding, injection molding, or extrusion molding, but is preferably manufactured by an injection molding method. Although it can also manufacture by an extrusion method, the plate-shaped main-body part 10 of the base material 2 obtained does not become flat in many cases. On the other hand, according to the injection molding method, the plate-like main body portion 10 of the obtained base material 2 becomes flat, and the masking material 1 can be securely adhered to the planar masked portion. Moreover, when providing the above-mentioned reinforcement rib 11, it is more preferable to manufacture the base material 2 by the injection molding method.
- a resin as a main resin component, a magnetic material (preferably magnetic powder), and an additive as required are melted using a Henschel mixer, a single or twin screw extruder, a Banbury mixer, a roll, or the like. After mixing, mold.
- the base material 2 is obtained as described above, if the magnetic material contained in the base material 2 is not magnetized, the magnetic material is magnetized by a known method.
- the obtained base material 2 is magnetically fixed to a portion to be masked, in this embodiment, a desired portion in the flat portion of the steel plate for automobiles that has been primed, for example, a portion in which a vehicle body number is engraved.
- a peelable protective material is applied to the surface of the substrate 2 to form the peelable protective layer 3.
- the peelable protective material may be applied by appropriately selecting the method described above.
- sealing may be applied to desired parts of automotive steel plates.
- a sealing operation is performed on a desired portion of a steel sheet for automobiles, and a sealer material (dust sealer) remaining during the sealing operation is applied to the surface of the substrate 2.
- the method for applying the sealer material is as described above.
- the sealer material is cured by heating.
- the temperature at this time is usually 130 to 150 ° C. In this way, the peelable protective layer 3 is formed, and the masking material 1 is obtained.
- the temperature at this time is usually 120 to 160 ° C. Since the base material 2 of the masking material 1 according to the present embodiment is excellent in heat resistance, it is not deformed or melted even in the above heating process, and therefore it is not fused to the masked portion. . Further, the magnetic force of the magnetic material contained in the base material 2 is not lowered, and the masking material 1 is not detached from the masked portion.
- the masking material 1 is removed from the masked part. After that, or when the above coating process is repeated, and the amount of coating material attached to the masking material 1 (peelable protective layer 3) increases, the peelable protective layer 3 is peeled from the surface of the substrate 2 in the masking material 1.
- the base material 2 from which the peelable protective layer 3 has been peeled is attached again to the masked portion in the same manner as described above. Since the masking material 1 is excellent in dimensional stability and easy to remove attached paint, it can be used repeatedly as described above.
- the masking material 1 may have only the plate-like main body 10 having a rectangular shape in plan view without the reinforcing rib portion 11, or may have a shape other than a rectangle, for example, an arbitrary polygonal shape, a circular shape, or an oval shape It may be a shape or the like. Further, the masking material 1 may not be a flat plate shape but may be an arbitrary three-dimensional shape such as an angle material shape or a channel material shape. Furthermore, the masking material 1 may be provided with a grip portion that can be gripped by a robot hand or the like.
- Example 1 Nylon 6 resin (melting point 220 ° C.) 16% (volume ratio) and strontium ferrite (SrO.6Fe 2 O 3 ) powder (average particle size 2 ⁇ m, Curie temperature 460 ° C.) 84% (volume ratio) as magnetic materials are mixed well.
- a composition was obtained. This composition was injection-molded to prepare a substrate having a size of 40 mm ⁇ 150 mm and a thickness of 1.5 mm. Next, a sealing material made of acrylic plastisol (manufactured by Sunstar Giken Co., Ltd., Penguin Seal # 2150) is applied to the substrate surface with a brush so as to have a thickness of 1.0 mm, thereby obtaining a masking material. It was.
- Example 2 Masking in the same manner as in Example 1 except that strippable paint (manufactured by Kansai Paint Co., Ltd., wrap guard LWG-20) was applied to the thickness of 0.5 mm as a peelable protective material instead of the sealer material. A material was prepared.
- strippable paint manufactured by Kansai Paint Co., Ltd., wrap guard LWG-20
- Magnetic force measurement> After performing the heating process and 20 cycles before the heating process, the magnetic force of the masking material was measured, and the magnetic force change before and after the heating process was confirmed. The magnetic force was measured at a distance of 1 cm from the surface of the masking material using a commercially available gauss meter (manufactured by Toyo Technica Co., Ltd., 5080 type handy gauss meter).
- the magnetic fixing force of the masking material was measured.
- the magnetic fixing force (N / 40 mm) was applied to a stainless steel plate (1.5 mm thickness, SUS430 plate) with a masking material (width 40 mm ⁇ length 150 mm, thickness 1.5 mm) 100 mm long, and using a tensile tester.
- the stainless steel plate and the masking material were pulled in the opposite direction and in parallel in the length direction at a speed of 300 mm / min and measured.
- the masking materials obtained in Examples 1 and 2 were excellent in heat resistance and could be used repeatedly. Further, there was no change in magnetic force due to heating, and the chemical resistance was excellent.
- the masking material of the present invention is suitably used for, for example, masking in a painting operation including a heating process of a steel plate for automobiles, or masking in an electrodeposition coating operation of an earth terminal portion.
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- Electromagnetism (AREA)
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Abstract
Description
〔マスキング材〕
図1に示すように、本実施形態に係るマスキング材1は、基材2と、基材2の片面(図1では上面)上に形成された剥離性保護層3とを備えて構成される。このマスキング材1は、加熱工程、例えば塗料の加熱硬化工程(焼付工程)等において使用されるものである。
寸法変化率(%)=(X2/X1)×100
本発明の一実施形態に係るマスキング材1の製造方法および当該マスキング材1を使用したマスキング方法について、以下説明する。なお、以下の方法はあくまでも一例であって、本発明はこれに限定されるものではない。マスキング対象としては、鋼板、鋼材等の磁性体を含む部材であれば何ら限定されないが、例えば、自動車用鋼板が挙げられる。本実施形態では、被マスキング部として、下塗後の自動車用鋼板の平面部を例示するが、これに限定されるものではない。
ナイロン6樹脂(融点220℃)16%(体積比)および磁性体としてストロンチウムフェライト(SrO・6Fe2O3)粉末(平均粒径2μm,キューリー温度460℃)84%(体積比)をよく混合し、組成物を得た。この組成物を射出成型して、40mm×150mmの大きさ、1.5mmの厚さの基材を作製した。次いで、剥離性保護材として、アクリル系プラスチゾルからなるシーラー材(サンスター技研社製,ペンギンシール#2150)を1.0mm厚になるように刷毛塗りで基材表面に塗布し、マスキング材を得た。
剥離性保護材として、シーラー材の替わりにストリッパブルペイント(関西ぺイント社製,ラップガードL WG-20)を0.5mm厚になるように塗布した以外は、実施例1と同様にしてマスキング材を作製した。
軟質塩化ビニル樹脂(融点120℃)15%(体積比)および磁性体としてストロンチウムフェライト(SrO・6Fe2O3)粉末(平均粒径2μm、キューリー温度、460℃)85%(体積)をよく混合し、組成物を得た。この組成物をカレンダー成形して、40mm×150mmの大きさ、1.5mmの厚さの基材を作製した。次いで、剥離性保護材として、アクリル系プラスチゾルからなるシーラー材(サンスター技研社製,ペンギンシール#2150)を1.0mm厚になるように刷毛塗りで塗布し、マスキング材を得た。
被着体としてのステンレス板(1.5mm厚,SUS430板)に、実施例1,2および比較例1で作製したマスキング材を貼り付け、スプレー塗装(塗料:アサヒペン社製,ラッカースプレー黒)を行った。この塗装では、加熱工程として160℃、4時間の加熱を行った。この加熱工程を1サイクルとし、20サイクルまで実施し、以下のようにして剥離性保護層の剥離性、繰り返し使用の可否、寸法変化率、外観変化、磁力および磁気的固定力を確認した。また、実施例1,2および比較例1で作製したマスキング材について、以下のようにして耐衝撃性および耐薬品性の試験を行った。結果を表1に示す。
加熱工程を20サイクル行った後に、マスキング材から剥離性保護層を剥離し、剥離性を確認した。
○:剥離性保護層が剥離可能であった。
×:剥離性保護層が剥離不可能であった。
加熱工程を20サイクル行った後に、マスキング材の被着体からの剥がれやすさを確認した。
○:マスキング材の被着体への融着なし。被着体への汚染性なし。
×:マスキング材の被着体への融着あり。
加熱工程を20サイクル行った後に、マスキング材の寸法変化を縦(150mm)方向および横(40mm)方向のそれぞれで測定し、寸法変化率(%)を求めた。また、外観変化を目視で確認した。なお、寸法変化率は以下の式により求めた。
寸法変化率(%)=(加熱工程20サイクル後の縦(横)方向の長さ/加熱工程前の縦(横)方向の長さ)×100
加熱工程前および加熱工程を20サイクル行った後に、マスキング材の磁力を測定し、加熱工程前後における磁力変化を確認した。磁力は市販のガウスメーター(東陽テクニカ社製,5080型ハンディガウスメーター)を使い、マスキング材の表面から1cm離れた距離で測定した。
加熱工程を20サイクル行った後に、マスキング材の磁気的固定力を測定した。磁気的固定力(N/40mm)は、ステンレス板(1.5mm厚,SUS430板)に、マスキング材(幅40mm×長さ150mm,厚み1.5mm)を100mm長で貼り付け、引張試験機によりステンレス板とマスキング材とを互いに反対方向に、かつ平行に速度300mm/minで長さ方向に引張り、測定した。
実施例1,2及び比較例1で作製したマスキング材を、コンクリート製の床から高さ1.5mの位置より落下させた。この床に対する落下試験を10回行い、破損状況を確認した。
実施例1,2及び比較例1で作製したマスキング材を、ラッカーシンナー並びに実施例1及び比較例1で使用したシーラー剤にそれぞれ2週間浸漬させた後の形状変化を確認した。
10…板状本体部
11…補強リブ部
2…基材
3…剥離性保護層
Claims (10)
- 加熱工程下で使用されるマスキング材であって、
前記加熱工程の温度よりも高い融点を有する樹脂を主樹脂成分とし、前記加熱工程の温度よりも高いキューリー温度を有する磁性体を含有する基材と、
前記基材の片面上に形成された、剥離性保護材からなる剥離性保護層と
を備えたことを特徴とするマスキング材。 - 加熱工程下で使用されるマスキング材であって、
前記加熱工程の温度よりも高い融点を有する樹脂を主樹脂成分とし、前記加熱工程の温度よりも高いキューリー温度を有する磁性体を含有する基材を備えており、
前記基材の片面上には、塗装前の任意の段階で剥離性保護材が塗布される
ことを特徴とするマスキング材。 - 前記樹脂がポリアミド樹脂であることを特徴とする請求項1または2に記載のマスキング材。
- 前記剥離性保護材がシーラー材またはストリッパブルペイントであることを特徴とする請求項1~3のいずれか一項に記載のマスキング材。
- 前記加熱工程によるマスキング面方向の寸法変化率が1.0%以下であることを特徴とする請求項1~4のいずれか一項に記載のマスキング材。
- ステンレス板に対する磁気的固定力が3~20N/40mmであることを特徴とする請求項1~5のいずれか一項に記載のマスキング材。
- 加熱工程下で使用されるマスキング材の製造方法であって、
前記加熱工程の温度よりも高い融点を有する樹脂を主樹脂成分とし、前記加熱工程の温度よりも高いキューリー温度を有する磁性体を含有する基材を製造し、
塗装前の任意の段階で、前記基材の片面上に剥離性保護材を塗布する
ことを特徴とするマスキング材の製造方法。 - 前記基材を射出成形によって成形することを特徴とする請求項6または7に記載のマスキング材の製造方法。
- 磁性体を含む部材をマスキング対象とし、加熱工程を含む塗装作業にてマスキングを行うマスキング方法であって、
前記加熱工程の温度よりも高い融点を有する樹脂を主樹脂成分とし、前記加熱工程の温度よりも高いキューリー温度を有する磁性体を含有する基材であって、前記磁性体が磁化した前記基材を、被マスキング部に磁気的に固定させ、
塗装前の任意の段階で、前記基材の表面に剥離性保護材を塗布し、剥離性保護層を備えたマスキング材とし、
塗装後、前記マスキング材を前記被マスキング部から取り外し、
塗装後の任意の段階で、前記マスキング材における基材の表面から前記剥離性保護層を剥離する
ことを特徴とするマスキング方法。 - 前記マスキング対象が、下塗後の自動車用鋼板であることを特徴とする請求項9に記載のマスキング方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US13/822,387 US10130966B2 (en) | 2010-09-30 | 2011-09-05 | Masking material, method for producing masking material, and masking method |
CN201180047402.1A CN103189147B (zh) | 2010-09-30 | 2011-09-05 | 遮盖部件、遮盖部件的制造方法以及遮盖方法 |
CA2811416A CA2811416A1 (en) | 2010-09-30 | 2011-09-05 | Masking material, production method for masking material and masking method |
GB1304022.5A GB2497457A (en) | 2010-09-30 | 2011-09-05 | Masking material, method for producing masking material, and masking method |
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JP2010222362A JP5507402B2 (ja) | 2010-09-30 | 2010-09-30 | マスキング材、マスキング材の製造方法およびマスキング方法 |
JP2010-222362 | 2010-09-30 |
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WO2012043152A1 true WO2012043152A1 (ja) | 2012-04-05 |
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Country Status (6)
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US (1) | US10130966B2 (ja) |
JP (1) | JP5507402B2 (ja) |
CN (1) | CN103189147B (ja) |
CA (1) | CA2811416A1 (ja) |
GB (1) | GB2497457A (ja) |
WO (1) | WO2012043152A1 (ja) |
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JPWO2013168616A1 (ja) * | 2012-05-07 | 2016-01-07 | リンテック株式会社 | マスキング材、マスキング材の製造方法、マスキング部材、マスキング方法、および塗装部材の製造方法 |
JP6022202B2 (ja) * | 2012-05-07 | 2016-11-09 | リンテック株式会社 | マスキング材、マスキング方法、および部分的に塗膜が形成されていない塗装部材の製造方法 |
JP5934623B2 (ja) * | 2012-09-26 | 2016-06-15 | 株式会社キーレックス | エアブロー装置 |
CN107486362A (zh) * | 2017-09-22 | 2017-12-19 | 中国海洋石油总公司 | 防火漆喷涂遮盖的磁性固定器 |
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JPS61234972A (ja) * | 1985-04-12 | 1986-10-20 | Mitsubishi Heavy Ind Ltd | マスキング方法 |
JPH033458U (ja) * | 1989-06-02 | 1991-01-14 | ||
JPH0824773A (ja) * | 1994-07-20 | 1996-01-30 | Nagoya Yuka Kk | 塗装方法 |
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US3420692A (en) * | 1964-10-22 | 1969-01-07 | Armitage & Co John L | Process for obtaining low bake paint films of improved cure and abrasion resistance |
US3709956A (en) * | 1968-11-18 | 1973-01-09 | Ford Motor Co | Polyester-siloxane paint |
GB2168650A (en) * | 1984-12-21 | 1986-06-25 | Dahle Design | Masking stencil for air brush technique |
JPS61257259A (ja) | 1985-05-09 | 1986-11-14 | Mitsubishi Heavy Ind Ltd | マスキングシ−ト |
JPS63128071A (ja) * | 1986-11-18 | 1988-05-31 | Mitsubishi Gas Chem Co Inc | ポリアミド樹脂組成物 |
JPH047483Y2 (ja) | 1987-10-19 | 1992-02-27 | ||
US5702774A (en) * | 1991-03-11 | 1997-12-30 | Westinghouse Air Brake Company | Method of preventing wicking |
JP3102585B2 (ja) | 1991-09-04 | 2000-10-23 | シーアイ化成株式会社 | 耐熱・可とう性磁石組成物 |
EP1081721A3 (en) * | 1999-09-01 | 2001-07-25 | Toda Kogyo Corporation | Magnetic sheet |
US6350491B1 (en) * | 2000-04-24 | 2002-02-26 | Adac Plasitis, Inc | Painting apparatus and method |
US6894124B2 (en) * | 2000-11-01 | 2005-05-17 | Kansai Paint Co., Ltd. | High solid paint compositions |
JP3569896B2 (ja) * | 2001-07-25 | 2004-09-29 | ミネベア株式会社 | ポリアミド系プラスチック磁性材料、およびそれから作製された磁石 |
-
2010
- 2010-09-30 JP JP2010222362A patent/JP5507402B2/ja active Active
-
2011
- 2011-09-05 CA CA2811416A patent/CA2811416A1/en not_active Abandoned
- 2011-09-05 WO PCT/JP2011/070135 patent/WO2012043152A1/ja active Application Filing
- 2011-09-05 US US13/822,387 patent/US10130966B2/en active Active
- 2011-09-05 GB GB1304022.5A patent/GB2497457A/en not_active Withdrawn
- 2011-09-05 CN CN201180047402.1A patent/CN103189147B/zh not_active Expired - Fee Related
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JPS61234972A (ja) * | 1985-04-12 | 1986-10-20 | Mitsubishi Heavy Ind Ltd | マスキング方法 |
JPH033458U (ja) * | 1989-06-02 | 1991-01-14 | ||
JPH0824773A (ja) * | 1994-07-20 | 1996-01-30 | Nagoya Yuka Kk | 塗装方法 |
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CN103189147B (zh) | 2016-07-06 |
JP2012076007A (ja) | 2012-04-19 |
CN103189147A (zh) | 2013-07-03 |
JP5507402B2 (ja) | 2014-05-28 |
CA2811416A1 (en) | 2012-04-05 |
GB2497457A (en) | 2013-06-12 |
US10130966B2 (en) | 2018-11-20 |
US20130174976A1 (en) | 2013-07-11 |
GB201304022D0 (en) | 2013-04-17 |
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