WO2022075250A1 - 外装フィルム - Google Patents

外装フィルム Download PDF

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Publication number
WO2022075250A1
WO2022075250A1 PCT/JP2021/036596 JP2021036596W WO2022075250A1 WO 2022075250 A1 WO2022075250 A1 WO 2022075250A1 JP 2021036596 W JP2021036596 W JP 2021036596W WO 2022075250 A1 WO2022075250 A1 WO 2022075250A1
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WO
WIPO (PCT)
Prior art keywords
layer
exterior film
sensitive adhesive
pressure
foam
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Application number
PCT/JP2021/036596
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English (en)
French (fr)
Japanese (ja)
Inventor
麻由 金子
丘雅 加瀬
Original Assignee
リンテック株式会社
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Application filed by リンテック株式会社 filed Critical リンテック株式会社
Priority to JP2022555461A priority Critical patent/JPWO2022075250A1/ja
Publication of WO2022075250A1 publication Critical patent/WO2022075250A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J11/00—Removable external protective coverings specially adapted for vehicles or parts of vehicles, e.g. parking covers
    • B60J11/04—Removable external protective coverings specially adapted for vehicles or parts of vehicles, e.g. parking covers for covering at least the roof of the vehicle, e.g. for covering the whole vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation

Definitions

  • the present invention relates to an exterior film.
  • the thickness of the roof panel has become thinner from the viewpoint of reducing the weight of vehicles such as automobiles. For this reason, rain noise and the like are easily transmitted to the vehicle interior, and various studies have been conducted to improve the soundproofing performance of the vehicle interior.
  • Patent Document 1 a configuration in which a foam is arranged on the inner surface side (vehicle interior side) of a vehicle body is known.
  • the inventors exhibit soundproofing performance against external noise and engine noise of the vehicle to some extent, but rain noise comes into direct contact with the vehicle body. It was found that the sound absorption performance was still unsatisfactory.
  • the present invention has been invented in order to solve the above problems, and an object of the present invention is to provide an exterior film capable of suitably absorbing rain sound.
  • the exterior film according to the present invention that achieves the above object is an exterior film that is attached to the outside of the vehicle body of the vehicle, and includes an air layer, a sound absorbing layer that absorbs rain sound, and the vehicle body of the sound absorbing layer. It has a weather resistant layer provided on the opposite side to the surface.
  • the exterior film described above rain does not come into direct contact with the car body, but comes into contact with the exterior film located outside the car body. Since the exterior film according to the present invention has a sound absorbing layer, rain sound can be suitably absorbed.
  • XY indicating a range means "X or more and Y or less”.
  • the operation and the measurement of physical properties are performed under the conditions of room temperature (20 to 25 ° C.) / relative humidity of 45 to 55%.
  • FIG. 1 is a schematic view showing how the exterior film 1 according to the present embodiment is attached to the top plate R (corresponding to the vehicle body) of the automobile C.
  • FIG. 2 is a schematic cross-sectional view showing the exterior film 1 according to the present embodiment.
  • the exterior film 1 is attached to the top plate R of the automobile C.
  • the release liner 70 is peeled off and the third adhesive layer 60 side is attached to the top plate R.
  • the top plate R of the automobile C when the exterior film 1 is attached has the rust preventive electrodeposition coating (undercoat) even after the rust preventive electrodeposition coating (undercoat) has been applied. It may be in a state after being coated with an intermediate coat and a top coat.
  • the exterior film 1 has a weather resistant layer 10, a first adhesive layer 20, a colored layer 30, a second adhesive layer 40, and a sound absorbing layer 50 in this order from the top. And a third pressure-sensitive adhesive layer 60 and a release liner 70.
  • the weather resistant layer 10 is provided for the purpose of enhancing the weather resistance.
  • the sound absorbing layer includes an air layer, and the air layer attenuates the energy of sound. However, when the air layer is blocked by rain or the like, the sound absorbing effect is significantly reduced. Therefore, the weatherproof layer 10 is an essential configuration for maintaining the effect of the sound absorbing layer.
  • the resin constituting the weather resistant layer 10 include well-known resins such as fluororesin, vinyl chloride resin, urethane resin, and acrylic resin, or mixed resins containing two or more of them.
  • the weatherproof layer 10 may be a laminated body of resin layers in which each resin layer is laminated. As the weather resistant layer 10, a laminate composed of a fluororesin layer and an acrylic resin layer is particularly preferable.
  • the fluororesin layer ensures antifouling property and weather resistance, while the acrylic resin layer improves the adhesiveness with the first pressure-sensitive adhesive layer 20. Therefore, in the laminate composed of the fluororesin layer and the acrylic resin layer, it is preferable that the acrylic resin layer is arranged on the first pressure-sensitive adhesive layer 20 side. Further, the acrylic resin layer is easy to add an additive such as an ultraviolet absorber, and is easy to enhance the function as the weather resistant layer 10.
  • fluororesin examples include polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, ethylene-chlorotrifluoroethylene copolymer, tetrafluoroethylene-perfluoroalkoxyethylene copolymer, and tetrafluoroethylene-hexafluoropropylene copolymer. , Polychlorotrifluoroethylene and the like.
  • the average value in the wavelength region of 300 nm to 380 nm is 20% or less.
  • the ultraviolet transmittance can be measured using a spectrophotometer. By setting the ultraviolet transmittance to 20% or less in this way, the amount of ultraviolet rays incident on the sound absorbing layer 50 can be reduced, and deterioration of the sound absorbing layer 50 can be suppressed.
  • the Young's modulus of the weatherproof layer 10 is preferably 100 MPa or more and 4000 MPa or less. According to this configuration, even if an external force is applied to the exterior film 1 arranged outside the vehicle, the sound absorbing layer 50 is not easily deformed, so that the exterior film 1 can be prevented from wrinkling.
  • the weather resistant layer 10 By providing the weather resistant layer 10 in this way, it is possible to suitably suppress the sound absorbing layer 50 from being flooded by rain and losing the sound absorbing function.
  • the thickness of the weather resistant layer 10 is not particularly limited, but is, for example, 30 to 75 ⁇ m. For example, if the thickness of the weather resistant layer 10 is thinner than 30 ⁇ m, the weather resistance may not be suitably exhibited. Further, for example, when the thickness of the weather resistant layer 10 is thicker than 75 ⁇ m, the curved surface followability to the top plate R deteriorates, and there is a possibility that the weather resistant layer 10 cannot be suitably attached to the top plate R.
  • the first pressure-sensitive adhesive layer 20 adheres the weather-resistant layer 10 and the colored layer 30.
  • the pressure-sensitive adhesive used for the first pressure-sensitive adhesive layer 20 is not particularly limited, and is an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, a polyester-based pressure-sensitive adhesive, and a styrene-diene block co-weight.
  • a combined pressure-sensitive adhesive, a vinyl alkyl ether-based pressure-sensitive adhesive, or the like can be used.
  • the above-mentioned pressure-sensitive adhesive may be used alone or in combination of two or more.
  • an acrylic pressure-sensitive adhesive can be particularly preferably used from the viewpoint of adhesive reliability.
  • the acrylic polymer constituting the acrylic pressure-sensitive adhesive contains a (meth) acrylic acid alkyl ester having adhesiveness as the main component of the monomer, and is a monomer copolymerizable with the (meth) acrylic acid alkyl ester as needed. It is formed by using (copolymerizable monomer).
  • Examples of the adhesive (meth) acrylic acid alkyl ester include methyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and octyl (meth) acrylate. These may be used alone or in combination of two or more.
  • the monomer copolymerizable with the (meth) acrylic acid alkyl ester include (meth) acrylic acid, maleic acid, fumaric acid, crotonic acid, itaconic acid, myristoleic acid, and palmitoleic acid.
  • carboxylic acid anhydride group-containing monomers such as maleic acid anhydride, itaconic acid anhydride; 2-hydroxyethyl (meth) acrylic acid, (meth) acrylic acid 2 -Hydroxypropyl, hydroxyalkyl (meth) acrylates such as 4-hydroxybutyl (meth) acrylate, hydroxyl group-containing monomers such as glycerin dimethacrylate; vinyl acetate, styrene, acrylonitrile and the like. These may be used alone or in combination of two or more.
  • the weight average molecular weight of the acrylic polymer is not particularly limited, but is preferably 100,000 to 1,000,000.
  • the weight average molecular weight is a polystyrene-equivalent value measured by a gel permeation chromatography (GPC) method.
  • the pressure-sensitive adhesive preferably contains a cross-linking agent in addition to the acrylic polymer.
  • the cross-linking agent include isocyanate-based cross-linking agents, epoxy-based cross-linking agents, and metal chelate-based cross-linking agents.
  • the amount of the cross-linking agent added is preferably 0.001 to 10 parts by mass, more preferably 0.005 to 2.0 parts by mass with respect to 100 parts by mass of the acrylic polymer.
  • the first pressure-sensitive adhesive layer 20 contains a light stabilizer, an antioxidant, a colorant, a filler, an antistatic agent, a tack fire, a wetting agent, a leveling agent, a thickener, an antifoaming agent, and a preservative, if necessary. Etc. can be added as appropriate.
  • the thickness of the first pressure-sensitive adhesive layer 20 is not particularly limited, but is preferably in the range of 10 to 100 ⁇ m from the viewpoint of tackiness and thinning.
  • the colored layer 30 is a concealing layer that prevents the sound absorbing layer 50 from being seen through the weather resistant layer 10. Therefore, it is preferable that the colored layer 30 has a high hiding rate. If the "concealment rate" is defined more quantitatively, the concealment rate of the colored layer 30 according to the present invention is 70% or more.
  • the "concealment rate” is an index showing the ability to shield the color of the background, and is defined by JIS K5600-4-1: 1999. After the exterior film 1 is attached to the white part and the black part of the concealment rate test paper, the tristimulus values YW and YB, respectively, are measured and calculated as a percentage of the concealment rate ratio YB / YW. This hiding rate is preferably 75% or more, more preferably 78% or more.
  • the colored layer 30 may be a layer containing a black pigment such as carbon black, for example. By having such a configuration, in the exterior film 1 of the present embodiment, the colored layer 30 exhibits a black color.
  • the colored layer 30 has a reflection density of 0.5 or more.
  • This reflection density is preferably 0.8 or more, more preferably 1.0 or more, still more preferably 1.3 or more, particularly preferably 1.7 or more, and most preferably 2.0. That is all.
  • the colored layer 30 is made black, and carbon black, which is a carbon particle, is added to the colored layer 30 as a means for making the colored layer 30 function as a concealing layer.
  • carbon black various types such as oil furnace black, channel black, lamp black, thermal black, and acetylene black are known. In this embodiment, any of them can be used.
  • the colored layer is not limited to black.
  • the colorants contained in the colored layer include graphite (graphite), copper oxide, manganese dioxide, aniline black, perylene black, titanium black, cyanine black, activated carbon, and ferrite (non-magnetic ferrite, magnetic).
  • magnetite magnetite, chromium oxide, iron oxide, molybdenum disulfide, chromium complex, composite oxide-based black dye, anthraquinone-based organic black dye, and the like can be mentioned.
  • the average particle size of the carbon particles is preferably 10 to 100 nm, more preferably 20 to 80 nm, and particularly preferably 25 to 70 nm.
  • the value of the average particle size of the carbon particles for example, several to several tens of carbon particles are randomly selected from photographs taken by an electron microscope, and the particle size (contour) of the selected individual carbon particles is selected. It can be obtained by calculating the arithmetic mean value from the maximum length connecting any two points on the line).
  • the content of the black pigment contained in the colored layer 30 is not particularly limited, and a desired hiding rate can be appropriately set in an amount that can be achieved.
  • the content of the black pigment in the colored layer 30 is preferably 1 to 30 parts by mass, more preferably 5 to 20 parts by mass with respect to 100% by mass of the solid content constituting the colored layer 30. More preferably, it is 10 to 15 parts by mass.
  • the colored layer 30 preferably contains a binder.
  • the binder that can be used include vinyl chloride resin, acrylic resin, polyester resin, alkyd resin, epoxy resin, polyurethane resin and the like. These binders can also be used in combination with a cross-linking agent such as an amino resin, a methylolated melamine resin, an alkyl etherified melamine resin, a urea resin, and a polyisocyanate compound.
  • the blending amount of the binder is also not particularly limited, but as an example, the content of the binder in the colored layer 30 is preferably 3 to 40 parts by mass with respect to 100 parts by mass of the solid content constituting the colored layer 30. It is more preferably 5 to 35 parts by mass, and even more preferably 10 to 30 parts by mass.
  • the thickness of the colored layer 30 is not particularly limited, but is, for example, 30 to 75 ⁇ m.
  • the colored layer 30 may be a stabilizer (for example, Ba—Zn-based, etc.), a lubricant, a filler, a processing aid, a plasticizer, a softener, a metal powder, an anti-fog agent, an ultraviolet scattering agent, or an ultraviolet absorbing layer, if necessary.
  • An ultraviolet shielding agent such as an agent, an antioxidant, an antioxidant, a anti-twisting agent and the like may be appropriately contained.
  • the colored layer may be a printed layer formed on the transparent resin film.
  • the resin constituting the transparent resin film include vinyl chloride resin, acrylic resin, polyester resin, alkyd resin, epoxy resin, polyurethane resin and the like.
  • the colored layer may be a printed layer formed on the sound absorbing layer 50.
  • the printing method is not particularly limited, and may be a layer formed by screen printing, offset printing, flexographic printing, gravure printing, inkjet printing, spray coating, bar coating, or the like. Further, the colored layer may be formed as a film by a calendar method, an extrusion method, a solution casting method or the like.
  • the second adhesive layer 40 adheres the colored layer 30 and the sound absorbing layer 50.
  • the second pressure-sensitive adhesive layer 40 the same one as that of the first pressure-sensitive adhesive layer 10 can be used.
  • the sound absorbing layer 50 is provided with an air layer and can absorb rain sound.
  • the sound absorbing layer 50 is a foam layer.
  • the foam layer is formed of a foam such as a polyolefin foam such as acrylic foam, vinyl chloride foam, urethane foam, and polyethylene foam.
  • a foam such as a polyolefin foam such as acrylic foam, vinyl chloride foam, urethane foam, and polyethylene foam.
  • urethane foam and / or polyolefin foam are preferable because the effects of the present invention are further exhibited.
  • the foam layer a commercially available product may be used, and as the commercially available products, Calmflex (registered trademark) (manufactured by INOAC), Samperka (registered trademark) (manufactured by Sanwa Kako), Toray Pef (registered trademark) ( Toray Industries, Inc.), Softron (registered trademark) (Sekisui Chemical Co., Ltd.), XLIM (Sekisui Chemical Co., Ltd.), Volara (Sekisui Chemical Co., Ltd.), etc. may be mentioned.
  • the foam layer may be either an independent foam or a continuous foam, but an independent foam is preferable from the viewpoint of preventing water infiltration from the side surface. Further, the foam layer may have a structure in which an independent foam and a continuous foam are mixed.
  • the density of the foam layer is preferably, for example, 20 to 350 kg / m 3 , and more preferably 30 to 100 kg / m 3 . If the density of the foam layer is within this range, sound absorption can be suitably performed.
  • the density of the foam layer indicates the apparent density measured by the measuring method according to JIS K 7222: 2005.
  • the thickness of the foam layer is preferably 60 ⁇ m to 5 mm.
  • the foam layer may not be able to absorb sound suitably.
  • the curved surface of the top plate R may not be suitable for being followed and water may be infiltrated.
  • the third adhesive layer 60 is a layer that adheres to the top plate R when the release liner 70 is peeled off.
  • the same pressure-sensitive adhesive as the first pressure-sensitive adhesive layer 10 can be used.
  • an acrylic pressure-sensitive adhesive can be particularly preferably used from the viewpoint of adhesive reliability.
  • the acrylic polymer constituting the acrylic pressure-sensitive adhesive contains a (meth) acrylic acid alkyl ester having adhesiveness as the main component of the monomer, and is a monomer copolymerizable with the (meth) acrylic acid alkyl ester as needed. It is formed by using (copolymerizable monomer).
  • the main component means that it is 50% by mass or more in the monomer, preferably 65% by mass or more, and more preferably 85% by mass or more.
  • acrylic polymer 100 parts by mass of (A) (meth) acrylic acid alkyl ester; and (B) carboxyl group-containing vinyl monomer 2 are preferable because the adhesiveness to the vehicle body (for example, a steel plate) is further improved. It is obtained by copolymerizing a monomer mixture containing parts by mass or more.
  • the (meth) acrylic acid alkyl ester is the same as that described in the column of the first pressure-sensitive adhesive layer.
  • carboxyl group-containing vinyl monomer examples include compounds having an ethylenic double bond and a carboxyl group in the same molecule.
  • Specific examples of the carboxyl group-containing vinyl monomer include (meth) acrylic acid, maleic acid, fumaric acid, crotonic acid, itaconic acid, myristoleic acid, palmitoleic acid, and oleic acid.
  • the carboxyl group-containing vinyl monomer is preferably (meth) acrylic acid, more preferably acrylic acid.
  • the content of the carboxyl group-containing vinyl monomer is preferably 2 parts by mass or more, and more preferably 2 to 15 parts by mass with respect to 100 parts by mass of the (meth) acrylic acid alkyl ester.
  • the monomer (copolymerizable monomer) copolymerizable with the (meth) acrylic acid alkyl ester is the same as that described in the column of the first pressure-sensitive adhesive layer.
  • the weight average molecular weight of the acrylic polymer used for the third pressure-sensitive adhesive layer 60 is not particularly limited, but is preferably 100,000 to 1,000,000.
  • the weight average molecular weight is a polystyrene-equivalent value measured by a gel permeation chromatography (GPC) method.
  • the glass transition temperature Tg of the acrylic polymer is preferably ⁇ 50 ° C. or higher.
  • the gasoline resistance of the pressure-sensitive adhesive layer is improved and the curved surface followability to the vehicle body is improved.
  • the glass transition temperature Tg of the acrylic polymer is preferably 10 ° C. or lower from the viewpoint of adhesiveness.
  • the adhesiveness and glass transition temperature can be adjusted by appropriately adjusting the type and content of the monomer type used, particularly the (meth) acrylic acid alkyl ester which is the main monomer.
  • the glass transition temperature of the acrylic polymer is calculated from the Tgn of each constituent polymer constituting the copolymer according to the following Fox formula.
  • the Tg value (Tgn) of the homopolymer of the monomer n is, for example, technical data of a monomer manufacturer such as Nippon Catalyst Co., Ltd., Mitsubishi Chemical Co., Ltd., Toa Synthetic Co., Ltd. and a polymer data handbook (published by Kobunshi, edited by the Polymer Society). Basic edition), January 1986 first edition), Polymer Handbook 4th edition (J. Brandrup, E. H. Immunogut, EA Grulke, 1999, Willy-Interscience).
  • the method for producing the acrylic polymer is not particularly limited, and conventionally known methods such as a solution polymerization method using a polymerization initiator, an emulsion polymerization method, a suspension polymerization method, a reverse phase suspension polymerization method, a thin film polymerization method, and a spray polymerization method are known.
  • the method can be used.
  • a method of initiating the polymerization with a polymerization initiator a method of initiating the polymerization by irradiating with radiation, an electron beam, ultraviolet rays or the like can also be adopted.
  • the solution polymerization method using a polymerization initiator is preferable because the molecular weight can be easily adjusted and impurities can be reduced.
  • ethyl acetate, toluene, methyl ethyl ketone or the like is used as a solvent, and preferably 0.01 to 0.50 parts by mass of a polymerization initiator is added to 100 parts by mass of the total amount of the monomers, and the reaction is carried out under a nitrogen atmosphere, for example. It is obtained by reacting at a temperature of 60 to 90 ° C. for 3 to 10 hours.
  • polymerization initiator examples include azo compounds such as azobisisobutyronitrile (AIBN), 2,2'-azobis (2-methylbutyronitrile), and azobiscyanovaleric acid; tert-butylperoxypivalate, tert. -Organic peroxides such as butylperoxybenzoate, tert-butylperoxy-2-ethylhexanoate, di-tert-butyl peroxide, cumene hydroperoxide, benzoyl peroxide, tert-butyl hydroperoxide; Examples thereof include inorganic peroxides such as hydrogen peroxide, ammonium persulfate, potassium persulfate and sodium persulfate. These may be used alone or in combination of two or more.
  • azo compounds such as azobisisobutyronitrile (AIBN), 2,2'-azobis (2-methylbutyronitrile), and azobiscyanovaleric acid
  • a chain transfer agent may be added to the monomer solution for the purpose of appropriately controlling the molecular weight of the acrylic polymer.
  • the chain transfer agent include n-dodecyl mercaptoethanol, 2-mercaptoethanol, ⁇ -mercaptopropionic acid, octyl ⁇ -mercaptopropionate, methoxybutyl ⁇ -mercaptopropionate, and trimethylolpropanetris ( ⁇ -thiopropionate).
  • Thiol compounds such as butyl thioglycolate, propanethiols, butanethiols and thiophosphite, and halogen compounds such as carbon tetrachloride can be mentioned. These may be used alone or in combination of two or more.
  • the pressure-sensitive adhesive used for the third pressure-sensitive adhesive layer 60 preferably contains a cross-linking agent in addition to the acrylic polymer.
  • the cross-linking agent include isocyanate-based cross-linking agents, epoxy-based cross-linking agents, and metal chelate-based cross-linking agents.
  • the amount of the cross-linking agent added is preferably 0.001 to 10 parts by mass, more preferably 0.005 to 2.0 parts by mass with respect to 100 parts by mass of the acrylic polymer.
  • the thickness of the third pressure-sensitive adhesive layer 60 is not particularly limited, but is preferably in the range of 10 to 100 ⁇ m from the viewpoint of tackiness and thinning.
  • the release liner 70 is a member having a function of protecting the third adhesive layer 60 and preventing a decrease in adhesiveness. Then, the release liner 70 is peeled off from the exterior film 1 when it is attached to the top plate R of the automobile C. Therefore, the exterior film 1 in the present embodiment includes a film that does not have the release liner 70.
  • the release liner 70 is not particularly limited, but is a polyester film such as polyethylene terephthalate, polybutylene terephthalate, or polyethylene naphthalate, or a plastic film such as a polyolefin film such as polypropylene or polyethylene; high-quality paper, glassin paper, kraft paper, etc. , Paper such as clay coat paper.
  • the thickness of the release liner 70 is usually about 10 to 400 ⁇ m. Further, the surface of the release liner 70 may be provided with a layer made of a release agent made of silicone or the like for improving the release property of the third pressure-sensitive adhesive layer 60. When such a layer is provided, the thickness of the layer is usually about 0.01 to 5 ⁇ m.
  • the method for stretching the exterior film 1 is not particularly limited, and examples thereof include TOM molding, insert molding, press molding, and in-mold molding.
  • the exterior film 1 according to the embodiment of the present invention has been described above through the embodiments, the present invention is not limited to the configuration described in the embodiments, and may be appropriately modified based on the scope of claims. Is possible.
  • the sound absorbing layer 50 was a foam layer.
  • the sound absorbing layer may be made of a non-woven fabric.
  • the non-woven fabric include spunbond non-woven fabric, melt blown non-woven fabric, thermal bond non-woven fabric, chemical bond non-woven fabric, needle punch non-woven fabric, stitch bond non-woven fabric and the like.
  • the nonwoven fabric may be a laminate of a plurality of types of nonwoven fabrics.
  • Examples of the material constituting the non-polymer include a thermoplastic resin, and specific examples thereof include ⁇ -olefins such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene and 1-octene alone.
  • Polymers or copolymers of polyolefins [High-pressure low-density polyethylene, linear low-density polyethylene (LLDPE), high-density polyethylene, ethylene / propylene random copolymers, ethylene / 1-butene random copolymers, etc.
  • Homopolymer or ethylene-based polymer such as ethylene / ⁇ -olefin copolymer; propylene homopolymer (polypropylene), propylene / ethylene random copolymer, propylene / ethylene / 1-butene random copolymer (random polypropylene) ), Propylene block copolymers, propylene-based polymers such as propylene / 1-butene random copolymers; 1-butene homopolymers, 1-butene / ethylene copolymers, 1-butene / propylene copolymers, etc.
  • 1-Butene-based polymer 4-methyl-1-pentene homopolymer, 4-methyl-1-pentene / propylene copolymer, 4-methyl-1-pentene / ⁇ -olefin copolymer, etc.
  • 4- Polyethylene-based polymers such as methyl-1-pentene-based polymers]; polyesters (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamides (nylon-6, nylon-66, polymethoxylen adipamide, etc.), Examples thereof include polyvinyl chloride, polyimide, ethylene / vinyl acetate copolymer, polyacrylonitrile, polycarbonate, and polystyrene.
  • the basis weight of the non-woven fabric is preferably 20 to 800 g / m 2 and more preferably 150 to 500 g / m 2 from the viewpoint of sound absorption.
  • the bulk density of the nonwoven fabric is preferably 0.01 to 0.5 g / cm 3 , more preferably 0.05 to 0.2 g / cm 3 , from the viewpoint of sound absorption.
  • a composite material of the above-mentioned non-woven fabric and another material may be used.
  • RuBA® composite of PET non-woven fabric and PET special paper
  • the exterior film 1 has the colored layer 30, but does not have to have the colored layer. At this time, it is desirable that the top plate R of the automobile C when the exterior film 1 is attached is in a state after being coated with rust-preventive electrodeposition coating.
  • the first pressure-sensitive adhesive layer 10 is provided between the weather-resistant layer 10 and the colored layer 30, but when the weather-resistant layer 10 and the colored layer 30 are heat-sealed, the first pressure-sensitive adhesive is provided. No layers are provided.
  • the colored layer 30 is not limited to black as an example, but may be another colored layer.
  • Exterior film 10 Weatherproof layer, 30 colored layer, 50 soundproof layer, 60 Third adhesive layer (adhesive layer), C car (vehicle), R top plate (body).

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  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
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PCT/JP2021/036596 2020-10-09 2021-10-04 外装フィルム WO2022075250A1 (ja)

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Citations (4)

* Cited by examiner, † Cited by third party
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JPS5948150A (ja) * 1982-09-10 1984-03-19 加島　淳吉 発泡体層を含む積層体およびその製造方法
JPH06212546A (ja) * 1993-01-20 1994-08-02 Minnesota Mining & Mfg Co <3M> 難燃性メルトブローン不織布積層防音シート材料
JP2006206020A (ja) * 2005-01-26 2006-08-10 Nobuyoshi Ajiro 車のルーフ雨音を減少する方法。

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JPS58136438A (ja) * 1982-02-09 1983-08-13 モダン・プラスチック工業株式会社 自動車外装用粘着シ−トおよびその製造法
JPS5948150A (ja) * 1982-09-10 1984-03-19 加島　淳吉 発泡体層を含む積層体およびその製造方法
JPH06212546A (ja) * 1993-01-20 1994-08-02 Minnesota Mining & Mfg Co <3M> 難燃性メルトブローン不織布積層防音シート材料
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