WO2012060311A1 - インサート成形用積層接着フィルム - Google Patents
インサート成形用積層接着フィルム Download PDFInfo
- Publication number
- WO2012060311A1 WO2012060311A1 PCT/JP2011/075025 JP2011075025W WO2012060311A1 WO 2012060311 A1 WO2012060311 A1 WO 2012060311A1 JP 2011075025 W JP2011075025 W JP 2011075025W WO 2012060311 A1 WO2012060311 A1 WO 2012060311A1
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- WIPO (PCT)
- Prior art keywords
- adhesive film
- resin
- film
- insert molding
- laminated
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
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- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
- B29C45/14811—Multilayered articles
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14311—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles
-
- 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
- B29C45/1679—Making multilayered or multicoloured articles applying surface layers onto injection-moulded substrates inside the mould cavity, e.g. in-mould coating [IMC]
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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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/241—Polyolefin, e.g.rubber
- C09J7/243—Ethylene or propylene polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
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- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C2045/14114—Positioning or centering articles in the mould using an adhesive
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14311—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles
- B29C2045/14319—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles bonding by a fusion bond
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2715/00—Condition, form or state of preformed parts, e.g. inserts
- B29K2715/006—Glues or adhesives, e.g. hot melts or thermofusible adhesives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/58—Upholstery or cushions, e.g. vehicle upholstery or interior padding
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/02—2 layers
-
- 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
- B32B2405/00—Adhesive articles, e.g. adhesive tapes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2813—Heat or solvent activated or sealable
- Y10T428/2817—Heat sealable
- Y10T428/2826—Synthetic resin or polymer
Definitions
- the present invention relates to an adhesive film used in insert molding in which a metal member is placed in a mold and a thermoplastic resin is injection molded.
- a metal member is placed in a mold and a thermoplastic resin is injection molded.
- adhesive film for insert molding in which adhesive adhesive film made of modified polyolefin resin and thermoplastic resin film without adhesiveness are laminated, suitable as an adhesive layer to improve the adhesion between resin and metal member in insert molding Can be used for
- a composite product in which a metal member and a resin member are integrated is used for an automobile interior member or the like.
- a method for integrating the metal member and the resin member a method of bonding using an adhesive, a fixing member such as a folded piece or a nail is provided on the metal member and the resin member, and both are fixed using this fixing member. And a joining method using screws or the like.
- a composite product in which a metal member and a resin member are integrated without using an adhesive is formed by separately forming the metal member and molding the resin member, and then integrating the two. Therefore, there is a problem that the process is complicated and not economical.
- Patent Document 2 describes a method that does not use an adhesive, in which a surface of a metal material is processed to form ultra-fine irregularities and then the metal material is combined with a resin by insert molding. Yes.
- time passes after the surface treatment there is a concern that the adhesiveness is lowered due to oxidation of the metal surface.
- the present invention relates to a laminated adhesive film for insert molding in which a tacky adhesive film containing a modified polyolefin resin and a thermoplastic resin film having no tackiness are laminated, and a metal member by a VOC-free and highly productive method
- An object of the present invention is to provide a highly heat-resistant laminated adhesive film capable of forming an adhesive layer having good adhesion with a resin to be injection-molded.
- an adhesive film having adhesiveness containing a modified polyolefin-based resin in which a polar group is introduced into a polyolefin-based resin is used as a thermoplastic resin film having no adhesiveness. It has been found that by laminating, the workability when laminating the metal member and the adhesive film is drastically improved, and the metal member and the resin to be injection-molded are well bonded and have high heat resistance. Specifically, when the modified polyolefin-based resin has a specific melting point, heat of fusion, and surface smoothness, the adhesive film layer has tackiness, so that positioning is easy due to improved adhesion with the metal member in contact with the adhesive film layer.
- thermoplastic resin film which does not have property is laminated
- operativity improves, such as not sticking to a hand. Furthermore, in the heat bonding process after positioning, since the thermoplastic resin film having no tackiness is in the outermost layer, it is possible to greatly reduce the thermal deterioration of the adhesive film, and the destruction of the adhesive film layer of the insert molded body
- the present invention has been completed by finding that it is possible to reduce the peeling due to the above, and that the obtained insert molded body has heat resistance at a level that can be used as an automobile member.
- the present invention has the following configuration.
- a tacky adhesive film containing a modified polyolefin resin graft-modified with a monomer containing an ethylenic double bond and a polar group in the same molecule is laminated with a non-tacky thermoplastic resin film.
- a laminated adhesive film for insert molding characterized in that the film satisfies the following conditions. 1) Melting point of modified polyolefin resin is 120 ° C. or higher 2) Heat of fusion of modified polyolefin resin is 20 J / g or less 3) Arithmetic average surface roughness of adhesive film surface is 0.6 ⁇ m or less (2).
- the adhesive film contains a modified polyolefin resin graft-modified with an aromatic vinyl monomer and a monomer containing an ethylenic double bond and a polar group in the same molecule
- the monomer containing the ethylenic double bond and the polar group in the same molecule is at least one selected from (meth) acrylic acid, maleic anhydride, and glycidyl (meth) acrylate ( The laminated adhesive film for insert molding according to 1) or (2).
- thermoplastic resin film having no adhesiveness is a polyamide resin film.
- thermoplastic resin film having no adhesiveness is a polyamide-based resin.
- thermoplastic resin film having no adhesiveness is a polypropylene resin film.
- the adhesive film portion After laminating the laminated adhesive film for insert molding according to any one of (1) to (8) so that the adhesive film surface having adhesiveness is in contact with the metal member, the adhesive film portion is heated to melt and adhere to the metal member.
- the adhesive film laminated metal member for insert molding is placed in the mold so that the thermoplastic resin film surface having no adhesiveness is on the void side in the mold, and is the same type as the thermoplastic resin film having no adhesiveness. Insert molding method for injection molding of resin.
- the laminated adhesive film for insert molding according to the present invention When the laminated adhesive film for insert molding according to the present invention is used, it is possible to form an adhesive layer having good adhesion with the injection resin on the metal member by a method of high productivity and VOC-free in insert molding with the metal member. It becomes.
- the polyolefin resin before graft modification (hereinafter referred to as a raw material polyolefin resin) is, for example, any of polyethylene, polypropylene, poly-1-butene, polyisobutylene, propylene and ethylene and / or 1-butene.
- Random or block copolymers in proportions, ethylene-propylene-diene terpolymers with a diene component of 50% by weight or less in any proportion of ethylene and propylene, polymethylpentene, cyclopentadiene and ethylene and And / or a cyclic polyolefin such as a copolymer with propylene, a random copolymer of ethylene or propylene with 50% by weight or less of a vinyl compound, a block copolymer, and the like.
- olefin-based elastomers are preferably used from the viewpoint of improving the adhesion between the adhesive film and the substrate described later.
- the olefin elastomer is an ⁇ -olefin polymer or copolymer having 2 to 20 carbon atoms, and specifically includes an ethylene / propylene copolymer, an ethylene / 1-butene copolymer, and an ethylene / 1-hexene.
- Copolymer ethylene / 4-methylpentene-1 copolymer, ethylene / 1-octene copolymer, propylene homopolymer, propylene / ethylene copolymer, propylene / ethylene / 1-butene copolymer, 1- Butene homopolymer, 1-butene / ethylene copolymer, 1-butene / propylene copolymer, 4-methylpentene-1 homopolymer, 4-methylpentene-1 / propylene copolymer, 4-methylpentene- 1,1-butene copolymer, 4-methylpentene-1, propylene / 1-butene copolymer, propylene / 1-butene copolymer, ethylene Vinyl acetate copolymer, ethylene-methacrylic acid copolymer, methyl ethylene-methacrylic acid copolymers.
- a polyolefin resin into which a polar group is introduced can be used because it is easily compatible with a monomer containing an ethylenic double bond and a polar group, which will be described later, in the same molecule.
- Specific examples of polyolefin resins having polar groups introduced include acid-modified polypropylene such as maleic anhydride-modified polypropylene, maleic acid-modified polypropylene, and acrylic acid-modified polypropylene; ethylene / vinyl chloride copolymer, ethylene / vinylidene chloride copolymer Polymer, ethylene / acrylonitrile copolymer, ethylene / methacrylonitrile copolymer, ethylene / vinyl acetate copolymer, ethylene / acrylamide copolymer, ethylene / methacrylamide copolymer, ethylene / acrylic acid copolymer, ethylene / Methacrylic acid copolymer, ethylene / maleic acid copoly
- Examples of the other resin or rubber include poly ⁇ -olefins such as polypentene-1 and polymethylpentene-1, ethylene such as propylene / butene-1 copolymer having a propylene content of less than 75% by weight, or ⁇ - Olefin / ⁇ -olefin copolymer; ethylene or ⁇ -olefin / ⁇ -olefin / diene monomer copolymer such as ethylene / propylene / 5-ethylidene-2-norbornene copolymer having a propylene content of less than 75% by weight Polymer; Polydiene copolymer such as polybutadiene and polyisoprene; Vinyl monomer / diene monomer random copolymer such as styrene / butadiene random copolymer and styrene / isoprene random copolymer; Styrene / butadiene / sty
- the amount of these other resins or rubbers added to the raw material polyolefin resin is different depending on the type of this resin or the type of rubber, and may be within the range not impairing the effects of the present invention as described above.
- the content is preferably about 25% by weight or less.
- the raw material polyolefin-based resin (which may contain various additive materials) may be in the form of particles or pellets, and the size and shape are not particularly limited.
- this additive material is added when the raw polyolefin resin is melted even if it is previously added to the raw polyolefin resin. It may be a thing.
- the propylene unit is a majority amount in that radicals are easily generated in the raw material polyolefin resin.
- the majority amount means that the propylene component is 50% by weight or more based on the polyolefin resin.
- ⁇ Monomer containing ethylenic double bond and polar group in the same molecule As the monomer containing an ethylenic double bond and a polar group in the same molecule for graft modification of the raw material polyolefin resin, various monomers can be used without any particular limitation.
- the polar group a carboxylic acid, an acid anhydride, or a derivative thereof can be preferably used.
- Such monomers include acrylic acid, methacrylic acid, maleic acid, fumaric acid, tetrahydrophthalic acid, itaconic acid, citraconic acid, crotonic acid, isocrotonic acid, norbornene dicarboxylic acid, bicyclo [2,2, 1]
- Unsaturated carboxylic acids such as hept-2-ene-5,6-dicarboxylic acid, or acid anhydrides or derivatives thereof (for example, acid halides, amides, imides, esters, etc.).
- the compound include maleenyl chloride, maleenylimide, maleic anhydride, itaconic anhydride, citraconic anhydride, tetrahydrophthalic anhydride, bicyclo [2,2,1] hept-2-ene-5,6-dicarboxylic acid Anhydride, dimethyl maleate, monomethyl maleate, diethyl maleate, diethyl fumarate, dimethyl itaconate, diethyl citraconic acid, dimethyl tetrahydrophthalate, bicyclo [2,2,1] hept-2-ene-5,6-dicarboxylic acid Dimethyl acid, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, glycidyl (meth) acrylate, monoglycidyl maleate, diglycidyl maleate, monoglycidyl itaconate, diglycidyl itaconate, monoglycidyl allyl succinate, ally
- the amount of the monomer containing an ethylenic double bond and a polar group in the same molecule is not particularly limited, but is preferably 0.1 to 20 parts by weight with respect to 100 parts by weight of the raw material polyolefin resin. When the amount is less than 0.1 part by weight, the adhesiveness when the adhesive film is formed is not sufficient. When the amount is more than 20 parts by weight, a large amount of residual monomer is generated, which adversely affects physical properties.
- a monomer containing an ethylenic double bond and a polar group in the same molecule is graft-modified to the raw material polyolefin resin
- other monomers may be used as long as the object of the present invention is not impaired.
- Other monomers include hydroxyl group-containing ethylenically unsaturated compounds, amino group-containing ethylenically unsaturated compounds, aromatic vinyl monomers, conjugated diene compounds, vinyl ester compounds, vinyl chloride, oxazoline group-containing unsaturated monomers. Examples include masses.
- molecular chain scission is suppressed during grafting to polypropylene or other molecular chain-breaking polyolefin, and the same ethylenic double bond and polar group are maintained while maintaining a high molecular weight. It is preferable because the monomer contained in the molecule can be introduced at a high ratio.
- aromatic vinyl monomers examples include styrene; methyl styrene such as o-methyl styrene, m-methyl styrene, p-methyl styrene, ⁇ -methyl styrene, ⁇ -methyl styrene, dimethyl styrene, and trimethyl styrene; o Chlorostyrenes such as chlorostyrene, m-chlorostyrene, p-chlorostyrene, ⁇ -chlorostyrene, ⁇ -chlorostyrene, dichlorostyrene, trichlorostyrene; o-bromostyrene, m-bromostyrene, p-bromostyrene, dibromo Bromostyrene such as styrene and tribromostyrene; fluorostyrene such as o-fluorostyrene, m-fluorostyrene, p-fluor
- the amount of the aromatic vinyl monomer added is preferably 0.01 to 10 parts by weight, and more preferably 0.1 to 5 parts by weight with respect to 100 parts by weight of the polyolefin resin. If the amount added is too small, the graft ratio of the monomer containing an ethylenic double bond and a polar group in the same molecule tends to be poor. On the other hand, when the addition amount exceeds 10 parts by weight, the graft efficiency of the monomer containing an ethylenic double bond and a polar group in the same molecule reaches a saturation range.
- radical polymerization initiator examples include organic peroxides and azo compounds.
- Illustrative examples include ketone peroxides such as methyl ethyl ketone peroxide and methyl acetoacetate peroxide; 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane, 1,1-bis (t- Peroxyketals such as butylperoxy) cyclohexane, n-butyl-4,4-bis (t-butylperoxy) valerate, 2,2-bis (t-butylperoxy) butane; permethane hydroperoxide, 1 , 1,3,3-tetramethylbutyl hydroperoxide, diisopropylbenzene hydroperoxide, cumene hydroperoxide, and other hydroperoxides; dicumyl peroxide, 2,5-dimethyl-2,5-di (t-butyl Peroxy) hexane, ⁇ , ⁇ '-bis ( Dialkyl such as -butylperoxy-m-iso
- radical polymerization initiators include 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane, 1,1 Peroxyketals such as bis (t-butylperoxy) cyclohexane, n-butyl-4,4-bis (t-butylperoxy) valerate, 2,2-bis (t-butylperoxy) butane; dicumyl Peroxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, ⁇ , ⁇ '-bis (t-butylperoxy-m-isopropyl) benzene, t-butylcumyl peroxide, di Dialkyl peroxides such as t-butyl peroxide and 2,5-dimethyl-2,5-di (t-butylperoxy) hexyne-3 Diacyl peroxides such as benzo
- the addition amount of the radical polymerization initiator is preferably in the range of 0.01 to 10 parts by weight, and preferably in the range of 0.2 to 5 parts by weight with respect to 100 parts by weight of the polyolefin resin. Further preferred. If it is less than 0.01 part by weight, the modification does not proceed sufficiently, and if it exceeds 10 parts by weight, fluidity and mechanical properties may be lowered.
- ⁇ Modified polyolefin resin is a resin obtained by graft-modifying a polyolefin resin (raw polyolefin resin) with a monomer containing an ethylenic double bond and a polar group in the same molecule. However, a composition in which an unmodified polyolefin-based resin is blended with a graft-modified resin is included as long as it satisfies the melting point and heat of fusion defined below.
- the modified polyolefin resin in the present invention has a melting point of 120 ° C. or higher, preferably 125 ° C. or higher and 165 ° C. or lower, more preferably 130 ° C. or higher and 160 ° C. or lower.
- the melting point is less than 120 ° C., the heat resistance required for automobile members and the like is insufficient, and the metal member and the molded member may peel off in a high temperature atmosphere.
- fusing point is higher than 165 degreeC, manufacture of raw material polyolefin resin is technically difficult.
- the modified polyolefin resin in the present invention has a heat of fusion of 20 J / g or less, preferably 0.1 J / g or more and 18 J / g or less, more preferably 0.2 J / g or more and 15 J / g or less. If the heat of fusion exceeds 20 J / g, the adhesiveness is insufficient, so that the initial adhesion between the adhesive film layer and the substrate in contact with the adhesive film layer is not sufficiently obtained, and the working efficiency is greatly reduced such as difficulty in positioning. . In addition, it is technically difficult to produce a raw material polyolefin resin having a heat of fusion of less than 0.1 J / g. Furthermore, the heat resistance is insufficient, and the metal member and the molded member may peel off in a high temperature atmosphere. is there. The melting point and the heat of fusion can be determined, for example, by the method described in Examples described later.
- the melting point and heat of fusion of the modified polyolefin resin can be easily achieved by using a raw material polyolefin resin having the characteristics. Furthermore, it is also possible to adjust the melting point and heat of fusion of the modified polyolefin resin by mixing a plurality of raw material polyolefin resins or by modifying the modified polyolefin resin with an unmodified or modified polyolefin resin. .
- a plurality of polyolefin resins are used, if the polyolefin resins having a majority of propylene units are mixed, the melting point of the mixture is close to the melting point of the polyolefin resin having a high melting point, and the heat of fusion is the heat of fusion of each resin. Since the value is close to the arithmetic average of, it is possible to easily adjust based on these findings.
- modified polyolefin resin can also be used by mixing with a thermoplastic resin other than the polyolefin resin.
- thermoplastic resin mixed with the modified polyolefin resin examples include vinyl monomers / diene monomer random copolymers such as styrene / butadiene random copolymer and styrene / isoprene random copolymer; styrene / butadiene / Styrene block copolymer, vinyl monomer / diene monomer / vinyl monomer block copolymer such as styrene / isoprene / styrene block copolymer; hydrogenation (styrene / butadiene random copolymer), hydrogenation Hydrogenation (vinyl monomer / diene monomer random copolymer) such as (styrene / isoprene random copolymer); Hydrogenation (styrene / butadiene / styrene block copolymer), Hydrogenation (styrene / isoprene random cop
- vinyl monomers such as styrene / butadiene / styrene block copolymers, styrene / isoprene / styrene block copolymers, etc. / Diene monomer / vinyl monomer block copolymer, hydrogenation (styrene / butadiene / styrene block copolymer), hydrogenation (styrene / isoprene / styrene block copolymer), etc. (vinyl) Monomer / diene monomer / vinyl monomer block copolymer) is preferred.
- the blending amount of the unmodified polyolefin resin and other thermoplastic resin mixed with the graft-modified polyolefin resin is 100 parts by weight of the graft-modified polyolefin resin from the viewpoint of adhesiveness when used as an adhesive film.
- the amount is preferably 0.1 to 50 parts by weight, more preferably 0.1 to 30 parts by weight.
- a tackifier may be blended for the purpose of improving the surface adhesive strength of the adhesive film.
- the tackifier include rosin resins (gum rosin, tall oil rosin, wood rosin, hydrogenated rosin, disproportionated rosin, polymerized rosin, maleated rosin, rosin ester, etc.), terpene phenol resin, terpene resin ( ⁇ -Polymers such as pinene, ⁇ -pinene and limonene), aromatic hydrocarbon modified terpene resins, petroleum resins (aliphatic, alicyclic, aromatic, etc.), coumarone / indene resins, styrene resins, phenols Resins (alkyl phenol, phenol xylene formaldehyde, rosin-modified phenol resin, etc.), xylene resins and the like can be mentioned, and these can be used alone or in combination of two or more.
- rosin resin terpene phenol resin, terpene resin, aromatic hydrocarbon modified terpene resin, petroleum resin, hydrogenated petroleum resin are preferable, and are compatible with the modified polyolefin resin of the present invention. And since it can contribute also to adhesion
- the blending amount of the tackifier mixed with the modified polyolefin resin is preferably 0.1 to 50 parts by weight, more preferably 0.1 to 100 parts by weight of the modified polyolefin resin from the viewpoint of heat resistance of the adhesive film. ⁇ 30 parts by weight is preferred.
- stabilizers such as antioxidants, metal deactivators, phosphorus processing stabilizers, UV absorbers, UV stabilizers, fluorescent brighteners, metal soaps, and antacid adsorbents, as necessary
- additives such as cross-linking agents, chain transfer agents, nucleating agents, lubricants, plasticizers, fillers, reinforcing materials, pigments, dyes, flame retardants, antistatic agents, etc. are added within a range that does not impair the effects of the present invention. May be.
- these stabilizers and additives may be added to the raw polyolefin resin in advance, or may be added when the raw polyolefin resin is graft-modified, After the modified polyolefin resin is produced, it may be added to the modified polyolefin resin by an appropriate method.
- the polymerization reaction for graft modification used in the present invention is not particularly limited, and solution polymerization, impregnation polymerization, melt polymerization and the like can be used.
- melt polymerization is simple and preferable.
- the heating temperature at the time of melt kneading is preferably 100 to 300 ° C. from the viewpoint that the raw polyolefin resin is sufficiently melted and is not thermally decomposed.
- the melt kneading time is usually 30 seconds to 60 minutes.
- melt kneading apparatus an extruder, a Banbury mixer, a mill, a kneader, a heating roll, or the like can be used. From the viewpoint of productivity, a method using a single-screw or twin-screw extruder is preferred. Moreover, in order to mix each material sufficiently uniformly, the melt kneading may be repeated a plurality of times.
- ⁇ Laminated adhesive film for insert molding In the present invention, an adhesive film having a tackiness containing a modified polyolefin resin is laminated with a thermoplastic resin film having no tackiness and used as a laminate adhesive film for insert molding.
- the metal member and the resin are integrally formed by insert molding.
- a method for insert molding using the laminated adhesive film for insert molding in the present invention will be described below. After laminating the laminated adhesive film for insert molding with an adhesive force so that the adhesive film surface is in contact with the metal member, the adhesive film portion is heated to melt and adhere to the metal member, and the insert adhesive film is laminated.
- the molded metal member is placed in the mold such that the thermoplastic resin film surface is on the in-mold void side, and resin injection molding is performed.
- the resin to be injection-molded is a resin having a high affinity with the thermoplastic resin film in the present invention, and is preferably the same type of resin.
- the thermoplastic resin film side of the laminated adhesive film for insert molding of the present invention is in contact with the injected resin, good adhesiveness can be exhibited between the injected resin and the laminated adhesive film for insert molding.
- the arithmetic average surface roughness of the adhesive film surface is 0.6 ⁇ m or less. Preferably, they are 0.01 micrometer or more and 0.5 micrometer or less.
- the arithmetic average surface roughness of the adhesive film surface is within the above range, tackiness will be exhibited, adhesion to metal members will be increased, and The workability is greatly improved, for example, it becomes possible to aim at a predetermined position.
- the expected performance is exhibited even when the arithmetic average surface roughness of the adhesive film surface is less than 0.01 ⁇ m, but the manufacturing cost increases, which is not economical.
- the arithmetic average surface roughness (Ra) in the present invention is a value specified in JIS B0601-1994, and is extracted from the roughness curve by a reference length in the direction of the average line and measured from the average line of the extracted part. The absolute values of deviations up to the curve are summed and averaged.
- the arithmetic average surface roughness can be determined by, for example, the method described in Examples described later.
- the method for controlling the arithmetic average surface roughness of the adhesive film surface within a predetermined range is not particularly limited.
- the adhesive film is laminated with a PET film having the above surface roughness during melt extrusion molding by the T-die method.
- thermoplastic resin film having no tackiness of the laminated adhesive film for insert molding in the present invention As a raw material of the thermoplastic resin film having no tackiness of the laminated adhesive film for insert molding in the present invention, a polypropylene resin or a polyamide resin is preferable. These resins are often used in the automotive field and the like, and are preferable because they exhibit good adhesiveness by selecting the same type of resin film as the resin that is integrally formed by insert molding.
- the laminated adhesive film for insert molding in the present invention has an appropriate hardness compared to a single-layer adhesive film because a thermoplastic resin film is laminated, and is easy to punch into a desired shape, Furthermore, it is excellent in workability because it does not stick to the hand during work.
- the material for the thermoplastic resin film of the laminated adhesive film for insert molding in the present invention is not particularly limited as long as it is not sticky and can be bonded to the modified polyolefin resin because it is selected according to the resin to be injection molded.
- These resins include polyethylene, polypropylene, polyolefins such as ethylene / vinyl acetate copolymer, polystyrene, styrene / acrylonitrile / butadiene copolymer, polyamide, polyester, polyimide, polycarbonate, polyphenylene ether, polyphenylene sulfide, and the like. Or 2 or more types are mentioned. Among these, a polypropylene resin or a polyamide resin is preferable.
- having an adhesive property is tested using a ball rolling device specified in JIS Z 0237 “Inclined Ball Tack Test Method” and is No. at 23 ° C. and an inclination angle of 5 °.
- What has a surface adhesive force of 3 or more means that it has surface adhesive force of less than the said range that it does not have adhesive force.
- the surface tackiness of the adhesive film surface having tackiness in the present invention is No. 1 from the viewpoint of adhesion to a metal member. 3 or more.
- the surface tack is NO. If it exceeds 24, it is not preferable because air easily accumulates between the adhesive film surface and the metal member in attaching to the metal member.
- the surface adhesiveness of the non-adhesive thermoplastic resin film in the present invention is No. because the adhesiveness to the hand is strong in the attaching operation to the metal member, and the workability is impaired. 2 or less.
- the level is preferably such that there is no stop of two balls.
- the polypropylene resin film in the present invention is not particularly limited.
- the film since the film has an appropriate hardness, workability is good, and thermal deterioration of the adhesive film due to gas barrier properties can be reduced. Therefore, a film having a heat of fusion of 40 J / g is preferable. Further, it may be a stretched film or an unstretched film.
- the polyamide resin film in the present invention is not particularly limited.
- polycaproamide nylon-6
- polyhexamethylene adipamide nylon-66
- polytetramethylene adipamide nylon- 46
- a film made of polydodecanamide nylon-12
- nylon-6 is preferable because it is relatively inexpensive and easily melts by the heat of the injection resin during insert molding. Further, it may be a stretched film or an unstretched film.
- the thickness of the laminated adhesive film for insert molding of the present invention is preferably from 30 ⁇ m to 300 ⁇ m, more preferably from 50 ⁇ m to 200 ⁇ m, since the adhesive force is sufficiently developed at the time of insert molding and the injection pressure is difficult to increase. Further, both the adhesive film layer and the thermoplastic resin film layer have a thickness of 10 ⁇ m or more.
- the method for producing the laminated adhesive film for insert molding according to the present invention is not particularly limited.
- the modified polyolefin resin is formed into a film using an extrusion molding machine, a calendar molding machine, an inflation molding machine, etc.
- examples thereof include a method of laminating with a plastic resin film, extrusion lamination of a modified polyolefin resin to a thermoplastic resin film, and co-extrusion of a modified polyolefin resin and a thermoplastic resin.
- a pressure-sensitive adhesive release separator on the adhesive film side.
- the separator for releasing the pressure-sensitive adhesive to be used is not particularly limited, but paper and PET film which have been release-treated by fluorine coating, silicone coating, embossing, blending with talc, etc. are preferably used.
- the metal member used in the insert molding using the laminated adhesive film for insert molding in the present invention is not particularly limited as long as the laminated adhesive film for insert molding of the present invention adheres, but for example, gold, silver,
- Examples include copper, tin, lead, steel, stainless steel, aluminum, aluminum alloy, galvalume steel, and galvanized steel. Of these, steel, stainless steel, aluminum, aluminum alloy, galvalume steel and galvanized steel are preferred. Note that two or more types of insert members made of metal may be used at the same time depending on the application.
- the polypropylene resin used in the insert molding using the laminated adhesive film for insert molding in the present invention is not particularly limited.
- propylene homopolymer, propylene / ethylene copolymer, propylene / 1-butene copolymer is used.
- 1 type or 2 types or more of a polymer is mentioned, These may contain fillers, such as a talc, a kaolin, a mica, a montmorillonite, glass fiber, a carbon fiber, and a polyethylene-type resin.
- the polyamide resin used in the insert molding using the laminated adhesive film for insert molding in the present invention is not particularly limited.
- polycaproamide nylon-6
- polyhexamethylene adipamide nylon- 66
- polytetramethylene adipamide nylon-46
- polydodecanamide nylon-12
- these contain fillers such as talc, kaolin, mica, montmorillonite, glass fiber, carbon fiber and the like. Also good.
- the temperature is lowered at a rate of 10 ° C./min to 10 ° C., held at that temperature for 5 minutes, and then the melting point from the peak temperature of the melting peak when the temperature is raised from 40 ° C. to 210 ° C. at a rate of 10 ° C./min
- the amount of heat of fusion was determined from the amount of heat calculated from the area surrounded by.
- As the differential scanning calorimeter Shimadzu differential scanning calorimeter DSC-50 (manufactured by Shimadzu Corporation) was used. [Measurement of arithmetic average surface roughness] The arithmetic average surface roughness of the adhesive film was measured using “Color 3D Laser Microscope / VK-9500” manufactured by KEYENCE.
- the adhesive film surface of the film was measured according to JIS Z 0237 “Inclined ball tack test method” except that the inclination angle was set to 5 °.
- the adhesive film (A-1T) having a width of about 13 cm and a thickness of 50 ⁇ m was obtained by laminating the PET film after the release treatment from a T-type die attached to the tip of the die. The obtained adhesive film was heat laminated at 200 ° C.
- a laminated adhesive film (A-1L) was cut into a square with a side of 25 mm and attached by hand so that the adhesive film surface was in contact with the end of an aluminum plate (25 mm ⁇ 120 mm, thickness 1 mm). It could be attached easily, and the adhesive film surface showed good adhesion to the aluminum plate, and did not peel off even when shaken vigorously, and did not deviate from the desired position.
- the obtained adhesive film / aluminum laminate was heated in a hot air oven set at 200 ° C. for 3 minutes, and then the laminate adhesive film and the aluminum plate were peeled off at 100 ° C. The film was firmly bonded at a level that would destroy the material.
- An aluminum plate to which the laminated adhesive film is heat-bonded is mounted in a mold, and the cylinder temperature is 320 ° C., the injection speed is 100 mm / s, and the mold temperature by an injection molding machine (manufactured by Toyo Machine Metal Industry, mold clamping force 100 t).
- Glass fiber-reinforced nylon 6 resin manufactured by Unitika, A1022GFL, containing 30% glass fiber was insert molded at 40 ° C. to obtain an insert molded body made of an aluminum plate and nylon 6 resin. An attempt was made to peel off the joint surface of this insert molded body, but it was firmly bonded to such a level that the aluminum plate was deformed.
- the mold used for molding has a cavity size of 127 mm ⁇ 30 mm ⁇ 3 mm, and a depression that can fit an aluminum plate on one side of the mold exists at a position deviated from the cavity.
- the mold is clamped in a state where 68 mm of the aluminum plate in the longitudinal direction of 120 mm exists in the cavity. Insert molding was performed by inserting the aluminum plate so that the laminated adhesive film heat-bonded to the aluminum plate was present in the cavity.
- modified polyolefin resin pellets (A-2) (Product name TEX44XCT) was supplied and melt-kneaded, and then 5 parts of styrene and 5 parts of glycidyl methacrylate were added and melt-kneaded from the middle of the cylinder to obtain modified polyolefin resin pellets (A-2).
- the resulting resin had a melting point of 143 ° C. and a heat of fusion of 6 J / g.
- the adhesive film (A-2T) having a width of about 13 cm and a thickness of 50 ⁇ m was obtained by laminating on a PET film that had been released from the T-type die attached to the tip of the die.
- the obtained adhesive film was heat laminated at 200 ° C. to a polyamide resin film (Toyobo, N1100-25, biaxially stretched film, 25 ⁇ m thick) to obtain a laminated adhesive film (A-2L).
- the arithmetic average surface roughness of the adhesive film surface of this laminated adhesive film is 0.4 ⁇ m, and the surface adhesion is No. 4.
- the obtained laminated adhesive film (A-2L) was cut into a square with a side of 25 mm and attached by hand so that the adhesive film surface was in contact with the end of an aluminum plate (25 mm ⁇ 120 mm, thickness 1 mm). It could be attached easily, and the adhesive film surface showed good adhesion to the aluminum plate, and did not peel off even when shaken vigorously, and did not deviate from the desired position.
- the obtained adhesive film / aluminum laminate was heated in a hot air oven set at 200 ° C. for 3 minutes, and then the laminate adhesive film and the aluminum plate were peeled off at 100 ° C. The film was firmly bonded at a level that would destroy the material.
- modified polyolefin resin pellets (A -3).
- the resulting resin had a melting point of 143 ° C. and a heat of fusion of 6 J / g.
- the adhesive film (A-3T) having a width of about 13 cm and a thickness of 50 ⁇ m was obtained by laminating the PET film after the release treatment from a T-type die attached to the tip of the die.
- the obtained adhesive film was heat laminated at 200 ° C. to a polyamide resin film (Toyobo, N1100-25, biaxially stretched film, 25 ⁇ m thick) to obtain a laminated adhesive film (A-3L).
- the arithmetic average surface roughness of the adhesive film surface of this laminated adhesive film is 0.4 ⁇ m, and the surface adhesion is No. 4.
- the obtained laminated adhesive film (A-3L) was cut into a square with a side of 25 mm, and attached by hand so that the adhesive film surface was in contact with the end of an aluminum plate (25 mm ⁇ 120 mm, thickness 1 mm). It could be attached easily, and the adhesive film surface showed good adhesion to the aluminum plate, and did not peel off even when shaken vigorously, and did not deviate from the desired position.
- the obtained adhesive film / aluminum laminate was heated in a hot air oven set at 200 ° C. for 3 minutes, and then the laminate adhesive film and the aluminum plate were peeled off at 100 ° C. The film was firmly bonded at a level that would destroy the material.
- the adhesive film (A-4T) having a width of about 13 cm and a thickness of 50 ⁇ m was obtained by laminating to a release-treated PET film from a T-type die attached to the tip of the die. The obtained adhesive film was thermally laminated at 200 ° C.
- a laminated adhesive film (A-4L) was obtained on a polyamide resin film (Mitsubishi Resin, Diamilon C, unstretched film, 25 ⁇ m thick) to obtain a laminated adhesive film (A-4L).
- the arithmetic average surface roughness of the adhesive film surface of this laminated adhesive film is 0.4 ⁇ m, and the surface adhesion is No. 3.
- the obtained laminated adhesive film (A-4L) was cut into a square with a side of 25 mm and attached by hand so that the adhesive film surface was in contact with the end of an aluminum plate (25 mm ⁇ 120 mm, thickness 1 mm). It could be attached easily, and the adhesive film surface showed good adhesion to the aluminum plate, and did not peel off even when shaken vigorously, and did not deviate from the desired position.
- Example 5 By laminating the adhesive film (A-1T) of Example 1 on a polypropylene resin film (Toyobo, Pyrene Film-CTP1111, unstretched film, 50 ⁇ m thick) at 200 ° C., a laminated adhesive film (A- 5L) was obtained.
- the arithmetic average surface roughness of the adhesive film surface of this laminated adhesive film is 0.4 ⁇ m, and the surface adhesion is No. 4.
- the obtained laminated adhesive film (A-5L) was cut into a square with a side of 25 mm and attached by hand so that the adhesive film surface was in contact with the end of an aluminum plate (25 mm ⁇ 120 mm, thickness 1 mm). It could be attached easily, and the adhesive film surface showed good adhesion to the aluminum plate, and did not peel off even when shaken vigorously, and did not deviate from the desired position.
- the obtained adhesive film / aluminum laminate was heated in a hot air oven set at 200 ° C. for 3 minutes, and then the laminate adhesive film and the aluminum plate were peeled off at 100 ° C. The film was firmly bonded at a level that would destroy the material.
- the aluminum plate to which the laminated adhesive film is heat-bonded is mounted in a mold, and the cylinder temperature is 220 ° C., the injection speed is 100 mm / s, and the mold temperature by an injection molding machine (manufactured by Toyo Kikai Kogyo Co., Ltd., clamping force 100 t).
- Example 6 The adhesive film (A-2T) of Example 2 was heat laminated at 200 ° C. to a polypropylene resin film (Toyobo, Pyrene Film-CTP1111, unstretched film, 50 ⁇ m thick) to obtain a laminated adhesive film (A- 6L).
- the arithmetic average surface roughness of the adhesive film surface of this laminated adhesive film is 0.4 ⁇ m, and the surface adhesion is No. 4.
- the obtained laminated adhesive film (A-6L) was cut into a square with a side of 25 mm and attached by hand so that the adhesive film surface was in contact with the end of an aluminum plate (25 mm ⁇ 120 mm, thickness 1 mm).
- Example 7 The adhesive film of Example 3 (A-3T) was heat laminated at 200 ° C. to a polypropylene resin film (Toyobo, Pyrene film-CTP1111, unstretched film, 50 ⁇ m thick) to obtain a laminated adhesive film (A- 7L) was obtained.
- the arithmetic average surface roughness of the adhesive film surface of this laminated adhesive film is 0.4 ⁇ m, and the surface adhesion is No. 4.
- the obtained laminated adhesive film (A-7L) was cut into a square with a side of 25 mm, and attached by hand so that the adhesive film surface was in contact with the end of an aluminum plate (25 mm ⁇ 120 mm, thickness 1 mm). It could be attached easily, and the adhesive film surface showed good adhesion to the aluminum plate, and did not peel off even when shaken vigorously, and did not deviate from the desired position.
- the obtained adhesive film / aluminum laminate was heated in a hot air oven set at 200 ° C. for 3 minutes, and then the laminate adhesive film and the aluminum plate were peeled off at 100 ° C.
- Example 1 The adhesive film (A-1T) of Example 1 was applied to an aluminum plate in the same manner as in Example 1, and heated in a hot air oven set at 200 ° C. for 3 minutes. However, since the viscosity was lowered, when the heating time was set to 30 seconds, yellowing or lowering of viscosity was not observed, but it could be peeled off from the aluminum plate by hand and was not sufficiently bonded. Also, when this adhesive film was stuck on an aluminum plate, it was sticky to the hand, so workability was poor.
- B-2T a polypropylene-based resin film
- the arithmetic average surface roughness of the adhesive film surface of this laminated adhesive film is 0.4 ⁇ m, and the surface adhesion is No. 4.
- the obtained laminated adhesive film (B-2L) was cut into a square with a side of 25 mm, and attached by hand so that the adhesive film surface was in contact with the end of an aluminum plate (25 mm ⁇ 120 mm, thickness 1 mm). It could be attached easily, and the adhesive film surface showed good adhesion to the aluminum plate, and did not peel off even when shaken vigorously, and did not deviate from the desired position.
- the obtained adhesive film / aluminum laminate was heated in a hot air oven set at 200 ° C. for 3 minutes, and then the laminate adhesive film and the aluminum plate were peeled off at 100 ° C.
- Example 3 The adhesive film (A-1T) of Example 1 was heat laminated at 200 ° C. to a polypropylene resin film (Toyobo, Pyrene Film-CTP1111, unstretched film, 50 ⁇ m thick), and then the adhesive film surface was sandpaper. By roughening, a laminated adhesive film (B-3L) was obtained. The arithmetic average surface roughness of the adhesive film surface of this laminated adhesive film is 1.5 ⁇ m, and the surface adhesive strength is No. 1. Two balls did not stop and had low adhesive strength.
- the obtained laminated adhesive film (B-3L) was cut into a square with a side of 25 mm, and was tried to be attached by hand so that the adhesive film surface was in contact with the end of an aluminum plate (25 mm ⁇ 120 mm, thickness 1 mm).
- the laminated adhesive film floated from the aluminum plate and could not be attached.
- the film (B-4T) having a width of about 13 cm and a thickness of 50 ⁇ m was obtained by laminating on a PET film that had been released from the T-type die attached to the tip of the die.
- the obtained film was heat laminated at 200 ° C. to a polypropylene resin film (Toyobo, Pyrene Film-CTP1111, unstretched film, 50 ⁇ m thick) to obtain a laminated adhesive film (B-4L).
- the arithmetic average surface roughness of the adhesive film surface of this laminated adhesive film was 0.4 ⁇ m. Two balls did not stop and had low adhesive strength.
- the obtained laminated adhesive film (B-4L) was cut into a square with a side of 25 mm, and tried to be attached by hand so that the adhesive film surface was in contact with the end of an aluminum plate (25 mm ⁇ 120 mm, thickness 1 mm). Since the laminated adhesive film did not adhere to the aluminum plate at all, it could not be attached.
- the film (B-5T) having a width of about 13 cm and a thickness of 50 ⁇ m was obtained by laminating on a PET film which had been subjected to a release treatment from a T-type die attached to the tip of the die. The obtained film was heat-laminated at 200 ° C.
- the obtained laminated adhesive film (B-5L) was cut into a square with a side of 25 mm and attached by hand so that the adhesive film surface was in contact with the end of an aluminum plate (25 mm ⁇ 120 mm, thickness 1 mm). It could be attached easily, and the adhesive film surface showed good adhesion to the aluminum plate, and did not peel off even when shaken vigorously, and did not deviate from the desired position.
- the obtained adhesive film / aluminum laminate was heated in a hot air oven set at 200 ° C. for 3 minutes, and then the laminate adhesive film and the aluminum plate were peeled off at 100 ° C. Since it was softened, it easily peeled off.
- the laminated adhesive films shown in Examples 1 to 7 satisfied the constituent requirements described in the present invention, and exhibited good workability and particularly adhesiveness at high temperatures.
- Comparative Example 2 it can be seen that the polyolefin resin is not modified, and therefore does not exhibit adhesiveness to the metal member.
- Comparative Example 3 since the adhesive film surface was poor in smoothness, it did not adhere to the metal member.
- Comparative Example 4 it was a resin having a high heat of fusion, poor adhesion, and did not adhere to the metal member.
- Comparative Example 5 since the melting point of the adhesive film was low, the adhesive performance was greatly reduced under high temperature conditions.
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Abstract
Description
(1).エチレン性二重結合および極性基を同一分子内に含む単量体を用いてグラフト変性した変性ポリオレフィン系樹脂を含有する粘着性を有する接着フィルムと、粘着性を有しない熱可塑性樹脂フィルムが積層されたフィルムであり、以下の条件を満たすことを特徴とするインサート成形用積層接着フィルム。
1)変性ポリオレフィン系樹脂の融点が120℃以上
2)変性ポリオレフィン系樹脂の融解熱量が20J/g以下
3)接着フィルム面の算術平均表面粗さが0.6μm以下
(2).前記接着フィルムが、エチレン性二重結合および極性基を同一分子内に含む単量体と芳香族ビニル単量体を用いてグラフト変性した変性ポリオレフィン系樹脂を含有することを特徴とする(1)記載のインサート成形用積層接着フィルム。
(3).前記エチレン性二重結合および極性基を同一分子内に含む単量体が、(メタ)アクリル酸、無水マレイン酸、(メタ)アクリル酸グリシジルから選ばれる少なくとも1つであることを特徴とする(1)または(2)記載のインサート成形用積層接着フィルム。
(4).その合計厚みが30~300μmであることを特徴とする(1)~(3)記載のインサート成形用積層接着フィルム。
(5).粘着性を有しない熱可塑性樹脂フィルムが、ポリアミド系樹脂フィルムであることを特徴とする(1)~(4)記載のインサート成形用積層接着フィルム。
(6).インサート成形時に射出される樹脂がポリアミド系樹脂であることを特徴とする(1)~(5)記載のインサート成形用積層接着フィルム。
(7).粘着性を有しない熱可塑性樹脂フィルムが、ポリプロピレン系樹脂フィルムであることを特徴とする(1)~(4)記載のインサート成形用積層接着フィルム。
(8).インサート成形時に射出される樹脂がポリプロピレン系樹脂であることを特徴とする(1)~(4)及び(7)記載のインサート成形用積層接着フィルム。
(9).(1)~(8)記載のインサート成形用積層接着フィルムを、粘着性を有する接着フィルム面が金属部材と接触するよう積層した後、加熱して接着フィルム部を溶融して金属部材と接着し、該インサート成形用接着フィルム積層金属部材を、粘着性を有しない熱可塑性樹脂フィルム面が金型内空隙側となるよう金型内に設置して、粘着性を有しない熱可塑性樹脂フィルムと同種の樹脂を射出成形するインサート成形方法。
本発明においてグラフト変性する前のポリオレフィン系樹脂(以下、原料ポリオレフィン系樹脂と示す)とは、例えばポリエチレン、ポリプロピレン、ポリ-1-ブテン、ポリイソブチレン、プロピレンとエチレンおよび/または1-ブテンとのあらゆる比率でのランダム共重合体またはブロック共重合体、エチレンとプロピレンとのあらゆる比率においてジエン成分が50重量%以下であるエチレン-プロピレン-ジエン三元共重合体、ポリメチルペンテン、シクロペンタジエンとエチレンおよび/またはプロピレンとの共重合体などの環状ポリオレフィン、エチレンまたはプロピレンと50重量%以下のビニル化合物などとのランダム共重合体、ブロック共重合体などが挙げられる。
また、前記の添加材料(ほかの樹脂、およびゴム)を用いる場合は、この添加材料は予め原料ポリオレフィン系樹脂に添加されているものであっても、原料ポリオレフィン系樹脂を溶融するときに添加されるものであってもよい。
≪エチレン性二重結合および極性基を同一分子内に含む単量体≫
上記原料ポリオレフィン樹脂をグラフト変性するためのエチレン性二重結合および極性基を同一分子内に含む単量体としては特に限定なく種々のものを用いることができる。極性基としては、カルボン酸、酸無水物、またはその誘導体、等を好適に用いることができる。このような単量体の具体例としては、アクリル酸、メタクリル酸、マレイン酸、フマル酸、テトラヒドロフタル酸、イタコン酸、シトラコン酸、クロトン酸、イソクロトン酸、ノルボルネンジカルボン酸、ビシクロ[2,2,1]ヘプトー2-エン-5,6-ジカルボン酸などの不飽和カルボン酸、またはこれらの酸無水物あるいはこれらの誘導体(例えば、酸ハライド、アミド、イミド、エステルなど)が挙げられる。具体的な化合物の例としては、塩化マレニル、マレニルイミド、無水マレイン酸、無水イタコン酸、無水シトラコン酸、テトラヒドロ無水フタル酸、ビシクロ[2,2,1]ヘプトー2-エン-5,6-ジカルボン酸無水物、マレイン酸ジメチル、マレイン酸モノメチル、マレイン酸ジエチル、フマル酸ジエチル、イタコン酸ジメチル、シトラコン酸ジエチル、テトラヒドロフタル酸ジメチル、ビシクロ[2,2,1]ヘプトー2-エン-5,6-ジカルボン酸ジメチル、ヒドロキシエチル(メタ)アクリレート、ヒドロキシプロピル(メタ)アクリレート、(メタ)アクリル酸グリシジル、マレイン酸モノグリシジル、マレイン酸ジグリシジル、イタコン酸モノグリシジル、イタコン酸ジグリシジル、アリルコハク酸モノグリシジル、アリルコハク酸ジグリシジル、p-スチレンカルボン酸グリシジル、アリルグリシジルエーテル、メタアリルグリシジルエーテル、スチレン-p-グリシジルエーテル、p-グリシジルスチレン、3,4-エポキシ-1-ブテン、3,4-エポキシ-3-メチル-1-ブテン、ビニルシクロヘキセンモノオキシド、メタクリル酸アミノエチルおよびメタクリル酸アミノプロピルなどを挙げることができる。これらの中では、(メタ)アクリル酸、無水マレイン酸、(メタ)アクリル酸グリシジル、が好ましい。
≪ラジカル重合開始剤≫
ラジカル重合開始剤としては、有機過酸化物あるいはアゾ化合物などを挙げることができる。例示するならば、メチルエチルケトンパーオキサイド、メチルアセトアセテートパーオキサイドなどのケトンパーオキサイド;1,1-ビス(t-ブチルパーオキシ)-3,3,5-トリメチルシクロヘキサン、1,1-ビス(t-ブチルパーオキシ)シクロヘキサン、n-ブチル-4,4-ビス(t-ブチルパーオキシ)バレレート、2,2-ビス(t-ブチルパーオキシ)ブタンなどのパーオキシケタール;パーメタンハイドロパーオキサイド、1,1,3,3-テトラメチルブチルハイドロパーオキサイド、ジイソプロピルベンゼンハイドロパーオキサイド、クメンハイドロパーオキサイドなどのハイドロパーオキサイド;ジクミルパーオキサイド、2,5-ジメチル-2,5-ジ(t-ブチルパーオキシ)ヘキサン、α,α´-ビス(t-ブチルパーオキシ-m-イソプロピル)ベンゼン、t-ブチルクミルパーオキサイド、ジ-t-ブチルパーオキサイド、2,5-ジメチル-2,5-ジ(t-ブチルパーオキシ)ヘキシン-3などのジアルキルパーオキサイド;ベンゾイルパーオキサイドなどのジアシルパーオキサイド;ジ(3-メチル-3-メトキシブチル)パーオキシジカーボネート、ジ-2-メトキシブチルパーオキシジカーボネートなどのパーオキシジカーボネート;t-ブチルパーオキシオクテート、t-ブチルパーオキシイソブチレート、t-ブチルパーオキシラウレート、t-ブチルパーオキシ-3,5,5-トリメチルヘキサノエート、t-ブチルパーオキシイソプロピルカーボネート、2,5-ジメチル-2,5-ジ(ベンゾイルパーオキシ)ヘキサン、t-ブチルパーオキシアセテート、t-ブチルパーオキシベンゾエート、ジ-t-ブチルパーオキシイソフタレートなどのパーオキシエステルなどの有機過酸化物の1種または2種以上があげられる。
≪変性ポリオレフィン系樹脂≫
本発明における変性ポリオレフィン系樹脂は、ポリオレフィン系樹脂(原料ポリオレフィン系樹脂)に対し、エチレン性二重結合および極性基を同一分子内に含む単量体を用いてグラフト変性させた樹脂のことであるが、グラフト変性した樹脂に未変性のポリオレフィン系樹脂を配合した組成物についても、以下に定義する融点及び融解熱量を満たす範囲であれば含むものとする。
≪インサート成形用積層接着フィルム≫
本発明では、変性ポリオレフィン系樹脂を含有する粘着性を有する接着フィルムを、粘着性を有しない熱可塑性樹脂フィルムと積層しインサート成形用積層接着フィルムとして用いることを特徴とする。特に、金属部材と樹脂をインサート成形により一体成形する際に好適に使用することができる。
本発明におけるインサート成形用積層接着フィルムを用いてインサート成形する方法を以下に示す。インサート成形用積層接着フィルムを、接着フィルム面が金属部材と接触するよう粘着力にて積層した後、加熱して接着フィルム部を溶融して金属部材と接着し、該インサート成形用接着フィルムを積層した金属部材を、熱可塑性樹脂フィルム面が金型内空隙側となるよう金型内に設置して、樹脂の射出成形を行う。射出成形する樹脂は、本発明における熱可塑性樹脂フィルムと親和性の高い樹脂であり、好ましくは同種の樹脂である。
発明のインサート成形用積層接着フィルムは、接着フィルム面の算術平均表面粗さが0.6μm以下である。好ましくは、0.01μm以上0.5μm以下である。先述した変性ポリオレフィン系樹脂が所定の融解熱量を有することに加え、接着フィルム面の算術平均表面粗さが上記範囲内であれば粘着性が発現し、金属部材に対する密着性が高くなり、簡便に所定の位置に狙って貼り付けることが可能となるなど、作業性が大幅に向上する。また、接着フィルム表面の算術平均表面粗さが0.01μm未満でも期待する性能は発揮されるが、製造コストが高くなり経済的でない。
本発明におけるインサート成形用積層接着フィルムは、熱可塑性樹脂フィルムが積層されているため単層の接着フィルムに比べ適度な硬さを有しており、所望の形状への打ち抜き加工が容易であり、さらに作業時に手に粘着しないため作業性に優れる。
本発明における粘着性を有する接着フィルム面の表面粘着性は、金属部材への密着性の観点からNo.3以上である。一方、表面粘着性がNO.24を超えると、金属部材への貼り付けにおいて、接着フィルム面と金属部材の間で空気が溜まりやすいことから好ましくない。
[融点および融解熱量の測定]
融点および融解熱量は、示差走査熱量測定(DSC)において、試料1~10mgを40℃から210℃まで10℃/分の速度で昇温し、該温度で5分間保持後、ついで210℃から40℃まで10℃/分の速度で降温し、該温度で5分間保持後、再度40℃から210℃まで10℃/分の速度で昇温したときの融解ピークのピーク温度から融点を、ベースラインと囲まれた面積から算出される熱量から融解熱量を求めた。なお、示差走査熱量計は、島津示差走査熱量計DSC-50(島津製作所製)を使用した。
[算術平均表面粗さの測定]
接着フィルムの算術平均表面粗さは、KEYENCE製「カラー3Dレーザ顕微鏡・VK-9500」を使用して測定した。
[表面粘着力の測定]
傾斜角度を5°にする以外は、JIS Z 0237「傾斜式ボールタック試験法」に準じてフィルムの接着フィルム面を測定した。
(実施例1)
ポリプロピレンエチレンラバー(ダウケミカル製Versify3401.05、MFR=8、融点143℃、融解熱量8J/g)100部、1,3-ジ(t-ブチルパーオキシイソプロピル)ベンゼン(日油製:パーブチルP、1分間半減期175℃)0.5部をホッパー口よりシリンダー温度200℃、スクリュー回転数150rpmに設定した二軸押出機(44mmφ、L/D=38.5、(株)日本製鋼所製、製品名TEX44XCT)に供給して溶融混練した後、次いで、シリンダー途中よりスチレン3部、グリシジルメタクリレート5部を加え溶融混練して変性ポリオレフィン系樹脂ペレットを得た(A-1)。得られた樹脂の融点は143℃、融解熱量は6J/gであった。得られた樹脂ペレット(A-1)を、シリンダー及びダイス温度200℃、スクリュー回転数100rpmに設定した単軸押出機(東洋精機製、品名ラボプラストミル;φ20mm、L/D=20)のホッパーに投入し、ダイス先端に取り付けたT型ダイスより、離型処理したPETフィルムにラミネートする形で、幅約13cm、厚み50μmの接着フィルム(A-1T)を得た。得られた接着フィルムをポリアミド系樹脂フィルム(東洋紡製、N1100-25、二軸延伸フィルム、25μ厚)に200℃で熱ラミネートすることにより、積層接着フィルム(A-1L)を得た。この積層接着フィルムの接着フィルム面の算術平均表面粗さは0.4μmで、表面粘着力はNo.4であった。
得られた積層接着フィルム(A-1L)を一辺25mmの正方形に切り出し、アルミ板(25mm×120mm、厚み1mm)の端部に接着フィルム面が接触するように手で貼り付けた。容易に貼り付け可能であり、接着フィルム面はアルミ板に対し良好な密着性を示し、激しく振り回しても剥がれず、所望の位置からずれなかった。得られた接着フィルム/アルミ積層体を200℃に設定した熱風オーブン内にて3分間加熱を行ったのち、100℃の条件下で積層接着フィルムとアルミ板を剥がそうとしたが、ポリアミド系樹脂フィルムが材料破壊するレベルで強固に接着していた。
(実施例2)
ポリプロピレンエチレンラバー(ダウケミカル製Versify3401.05、MFR=8、融点143℃、融解熱量8J/g)100部、1,3-ジ(t-ブチルパーオキシイソプロピル)ベンゼン(日油製:パーブチルP、1分間半減期175℃)0.5部をホッパー口よりシリンダー温度200℃、スクリュー回転数150rpmに設定した二軸押出機(44mmφ、L/D=38.5、(株)日本製鋼所製、製品名TEX44XCT)に供給して溶融混練した後、次いで、シリンダー途中よりスチレン5部、グリシジルメタクリレート5部を加え溶融混練して変性ポリオレフィン系樹脂ペレットを得た(A-2)。得られた樹脂の融点は143℃、融解熱量は6J/gであった。得られた樹脂ペレット(A-2)を、シリンダー及びダイス温度200℃、スクリュー回転数100rpmに設定した単軸押出機(東洋精機製、品名ラボプラストミル;φ20mm、L/D=20)のホッパーに投入し、ダイス先端に取り付けたT型ダイスより、離型処理したPETフィルムにラミネートする形で、幅約13cm、厚み50μmの接着フィルム(A-2T)を得た。得られた接着フィルムをポリアミド系樹脂フィルム(東洋紡製、N1100-25、二軸延伸フィルム、25μ厚)に200℃で熱ラミネートすることにより、積層接着フィルム(A-2L)を得た。この積層接着フィルムの接着フィルム面の算術平均表面粗さは0.4μmで、表面粘着力はNo.4であった。
得られた積層接着フィルム(A-2L)を一辺25mmの正方形に切り出し、アルミ板(25mm×120mm、厚み1mm)の端部に接着フィルム面が接触するように手で貼り付けた。容易に貼り付け可能であり、接着フィルム面はアルミ板に対し良好な密着性を示し、激しく振り回しても剥がれず、所望の位置からずれなかった。得られた接着フィルム/アルミ積層体を200℃に設定した熱風オーブン内にて3分間加熱を行ったのち、100℃の条件下で積層接着フィルムとアルミ板を剥がそうとしたが、ポリアミド系樹脂フィルムが材料破壊するレベルで強固に接着していた。
(実施例3)
ポリプロピレンエチレンラバー(ダウケミカル製Versify3401.05、MFR=8、融点143℃、融解熱量8J/g)100部、1,3-ジ(t-ブチルパーオキシイソプロピル)ベンゼン(日油製:パーブチルP、1分間半減期175℃)0.1部、無水マレイン酸(和光純薬社製)10部をホッパー口よりシリンダー温度200℃、スクリュー回転数150rpmに設定した二軸押出機(44mmφ、L/D=38.5、(株)日本製鋼所製、製品名TEX44XCT)に供給して溶融混練した後、次いで、シリンダー途中よりスチレン5部を加え溶融混練して変性ポリオレフィン系樹脂ペレットを得た(A-3)。得られた樹脂の融点は143℃、融解熱量は6J/gであった。得られた樹脂ペレット(A-3)を、シリンダー及びダイス温度200℃、スクリュー回転数100rpmに設定した単軸押出機(東洋精機製、品名ラボプラストミル;φ20mm、L/D=20)のホッパーに投入し、ダイス先端に取り付けたT型ダイスより、離型処理したPETフィルムにラミネートする形で、幅約13cm、厚み50μmの接着フィルム(A-3T)を得た。得られた接着フィルムをポリアミド系樹脂フィルム(東洋紡製、N1100-25、二軸延伸フィルム、25μ厚)に200℃で熱ラミネートすることにより、積層接着フィルム(A-3L)を得た。この積層接着フィルムの接着フィルム面の算術平均表面粗さは0.4μmで、表面粘着力はNo.4であった。
得られた積層接着フィルム(A-3L)を一辺25mmの正方形に切り出し、アルミ板(25mm×120mm、厚み1mm)の端部に接着フィルム面が接触するように手で貼り付けた。容易に貼り付け可能であり、接着フィルム面はアルミ板に対し良好な密着性を示し、激しく振り回しても剥がれず、所望の位置からずれなかった。得られた接着フィルム/アルミ積層体を200℃に設定した熱風オーブン内にて3分間加熱を行ったのち、100℃の条件下で積層接着フィルムとアルミ板を剥がそうとしたが、ポリアミド系樹脂フィルムが材料破壊するレベルで強固に接着していた。
(実施例4)
実施例1の変性ポリオレフィン系樹脂ペレット(A-1)90部とプロピレン単独重合体ペレット(プライムポリマー製S119、MFR=60、融点164℃、融解熱量103J/g)10部の混合物をホッパー口よりシリンダー温度200℃、スクリュー回転数150rpmに設定した二軸押出機(44mmφ、L/D=38.5、(株)日本製鋼所製、製品名TEX44XCT)に供給して溶融混練して変性ポリオレフィン系樹脂ペレットを得た(A-4)。得られた樹脂の融点は161℃、融解熱量は14J/gであった。得られた樹脂ペレット(A-4)を、シリンダー及びダイス温度200℃、スクリュー回転数100rpmに設定した単軸押出機(東洋精機製、品名ラボプラストミル;φ20mm、L/D=20)のホッパーに投入し、ダイス先端に取り付けたT型ダイスより、離型処理したPETフィルムにラミネートする形で、幅約13cm、厚み50μmの接着フィルム(A-4T)を得た。得られた接着フィルムをポリアミド系樹脂フィルム(三菱樹脂製、ダイアミロンC、無延伸フィルム、25μ厚)に200℃で熱ラミネートすることにより、積層接着フィルム(A-4L)を得た。この積層接着フィルムの接着フィルム面の算術平均表面粗さは0.4μmで、表面粘着力はNo.3であった。
得られた積層接着フィルム(A-4L)を一辺25mmの正方形に切り出し、アルミ板(25mm×120mm、厚み1mm)の端部に接着フィルム面が接触するように手で貼り付けた。容易に貼り付け可能であり、接着フィルム面はアルミ板に対し良好な密着性を示し、激しく振り回しても剥がれず、所望の位置からずれなかった。得られた接着フィルム/アルミ積層体を200℃に設定した熱風オーブン内にて3分間加熱を行ったのち、100℃の条件下で積層接着フィルムとアルミ板を剥がそうとしたが、ポリアミド系樹脂フィルムが材料破壊するレベルで強固に接着していた。
(実施例5)
実施例1の接着フィルム(A-1T)をポリプロピレン系樹脂フィルム(東洋紡績製、パイレンフィルム-CT P1111、無延伸フィルム、50μ厚)に200℃で熱ラミネートすることにより、積層接着フィルム(A-5L)を得た。この積層接着フィルムの接着フィルム面の算術平均表面粗さは0.4μmで、表面粘着力はNo.4であった。
得られた積層接着フィルム(A-5L)を一辺25mmの正方形に切り出し、アルミ板(25mm×120mm、厚み1mm)の端部に接着フィルム面が接触するように手で貼り付けた。容易に貼り付け可能であり、接着フィルム面はアルミ板に対し良好な密着性を示し、激しく振り回しても剥がれず、所望の位置からずれなかった。得られた接着フィルム/アルミ積層体を200℃に設定した熱風オーブン内にて3分間加熱を行ったのち、100℃の条件下で積層接着フィルムとアルミ板を剥がそうとしたが、ポリプロピレン系樹脂フィルムが材料破壊するレベルで強固に接着していた。
(実施例6)
実施例2の接着フィルム(A-2T)をポリプロピレン系樹脂フィルム(東洋紡績製、パイレンフィルム-CT P1111、無延伸フィルム、50μ厚)に200℃で熱ラミネートすることにより、積層接着フィルム(A-6L)を得た。この積層接着フィルムの接着フィルム面の算術平均表面粗さは0.4μmで、表面粘着力はNo.4であった。
得られた積層接着フィルム(A-6L)を一辺25mmの正方形に切り出し、アルミ板(25mm×120mm、厚み1mm)の端部に接着フィルム面が接触するように手で貼り付けた。容易に貼り付け可能であり、接着フィルム面はアルミ板に対し良好な密着性を示し、激しく振り回しても剥がれず、所望の位置からずれなかった。得られた接着フィルム/アルミ積層体を200℃に設定した熱風オーブン内にて3分間加熱を行ったのち、100℃の条件下で積層接着フィルムとアルミ板を剥がそうとしたが、ポリプロピレン系樹脂フィルムが材料破壊するレベルで強固に接着していた。
(実施例7)
実施例3の接着フィルム(A-3T)をポリプロピレン系樹脂フィルム(東洋紡績製、パイレンフィルム-CT P1111、無延伸フィルム、50μ厚)に200℃で熱ラミネートすることにより、積層接着フィルム(A-7L)を得た。この積層接着フィルムの接着フィルム面の算術平均表面粗さは0.4μmで、表面粘着力はNo.4であった。
得られた積層接着フィルム(A-7L)を一辺25mmの正方形に切り出し、アルミ板(25mm×120mm、厚み1mm)の端部に接着フィルム面が接触するように手で貼り付けた。容易に貼り付け可能であり、接着フィルム面はアルミ板に対し良好な密着性を示し、激しく振り回しても剥がれず、所望の位置からずれなかった。得られた接着フィルム/アルミ積層体を200℃に設定した熱風オーブン内にて3分間加熱を行ったのち、100℃の条件下で積層接着フィルムとアルミ板を剥がそうとしたが、ポリプロピレン系樹脂フィルムが材料破壊するレベルで強固に接着していた。
(比較例1)
実施例1の接着フィルム(A-1T)を、実施例1と同様にしてアルミ板に貼付し、200℃に設定した熱風オーブン内にて3分間加熱を行ったところ、接着フィルムが若干黄変し、低粘度化していたため、加熱時間を30秒としたところ、黄変や低粘度化は認められなかったが、アルミ板から手で剥がすことが可能であり、充分に接着していなかった。またこの接着フィルムをアルミ板に貼付する際、手に粘着するため、作業性は悪かった。
(比較例2)
変性ポリオレフィン系樹脂ペレット(A-1)の代わりに、未変性のポリプロピレンエチレンラバー(ダウケミカル製Versify3401.05、MFR=8、融点143℃、融解熱量8J/g)を用いて実施例1と同様にして厚み50μmのフィルム(B-2T、算術平均表面粗さは0.4μm)を得、ポリプロピレン系樹脂フィルム(東洋紡績製、パイレンフィルム-OT P2108、延伸フィルム、40μ厚)と200℃で熱ラミネートすることにより、積層接着フィルム(B-2L)を得た。この積層接着フィルムの接着フィルム面の算術平均表面粗さは0.4μmで、表面粘着力はNo.4であった。
得られた積層接着フィルム(B-2L)を一辺25mmの正方形に切り出し、アルミ板(25mm×120mm、厚み1mm)の端部に接着フィルム面が接触するように手で貼り付けた。容易に貼り付け可能であり、接着フィルム面はアルミ板に対し良好な密着性を示し、激しく振り回しても剥がれず、所望の位置からずれなかった。得られた接着フィルム/アルミ積層体を200℃に設定した熱風オーブン内にて3分間加熱を行ったのち、100℃の条件下で積層接着フィルムとアルミ板を剥がそうとすると、接着フィルム面とアルミ板の接着が弱いために、容易に剥がれてしまった。
(比較例3)
実施例1の接着フィルム(A-1T)をポリプロピレン系樹脂フィルム(東洋紡績製、パイレンフィルム-CT P1111、無延伸フィルム、50μ厚)に200℃で熱ラミネートした後、接着フィルム面をサンドペーパーで荒らすことにより、積層接着フィルム(B-3L)を得た。この積層接着フィルムの接着フィルム面の算術平均表面粗さは、1.5μmで、表面粘着力はNo.2ボールが停止せず、粘着力の低いものであった。
得られた積層接着フィルム(B-3L)を一辺25mmの正方形に切り出し、アルミ板(25mm×120mm、厚み1mm)の端部に接着フィルム面が接触するように手で貼り付けようとしたが、積層接着フィルムがアルミ板から浮いてしまい、貼り付けることができなかった。
(比較例4)
ランダムポリプロピレン(プライムポリマー製J229E、MFR=50、融点138℃)100部、1,3-ジ(t-ブチルパーオキシイソプロピル)ベンゼン(日油製:パーブチルP、1分間半減期175℃)0.5部をホッパー口よりシリンダー温度200℃、スクリュー回転数150rpmに設定した二軸押出機(44mmφ、L/D=38.5、(株)日本製鋼所製、製品名TEX44XCT)に供給して溶融混練した後、次いで、シリンダー途中よりスチレン5部、グリシジルメタクリレート5部を加え溶融混練して変性ポリオレフィン系樹脂ペレットを得た(B-4)。得られた樹脂の融点は138℃、融解熱量は50J/gであった。得られた樹脂ペレット(B-4)を、シリンダー及びダイス温度200℃、スクリュー回転数100rpmに設定した単軸押出機(東洋精機製、品名ラボプラストミル;φ20mm、L/D=20)のホッパーに投入し、ダイス先端に取り付けたT型ダイスより、離型処理したPETフィルムにラミネートする形で、幅約13cm、厚み50μmのフィルム(B-4T)を得た。得られたフィルムをポリプロピレン系樹脂フィルム(東洋紡績製、パイレンフィルム-CT P1111、無延伸フィルム、50μ厚)に200℃で熱ラミネートすることにより、積層接着フィルム(B-4L)を得た。この積層接着フィルムの接着フィルム面の算術平均表面粗さは、0.4μmであったが、表面粘着力はNo.2ボールが停止せず、粘着力の低いものであった。
(比較例5)
ポリプロピレンエチレンラバー(エクソンモービル製Vistamaxx6202、MFR=18、融点113℃)100部、1,3-ジ(t-ブチルパーオキシイソプロピル)ベンゼン(日油製:パーブチルP、1分間半減期175℃)0.5部をホッパー口よりシリンダー温度200℃、スクリュー回転数150rpmに設定した二軸押出機(44mmφ、L/D=38.5、(株)日本製鋼所製、製品名TEX44XCT)に供給して溶融混練した後、次いで、シリンダー途中よりスチレン5部、グリシジルメタクリレート5部を加え溶融混練して変性ポリオレフィン系樹脂ペレットを得た(B-5)。得られた樹脂の融点は113℃、融解熱量は0.5J/gであった。得られた樹脂ペレット(B-5)を、シリンダー及びダイス温度200℃、スクリュー回転数100rpmに設定した単軸押出機(東洋精機製、品名ラボプラストミル;φ20mm、L/D=20)のホッパーに投入し、ダイス先端に取り付けたT型ダイスより、離型処理したPETフィルムにラミネートする形で、幅約13cm、厚み50μmのフィルム(B-5T)を得た。得られたフィルムをポリプロピレン系樹脂フィルム(東洋紡績製、パイレンフィルム-CT P1111、無延伸フィルム、50μ厚)に200℃で熱ラミネートすることにより、積層接着フィルム(B-5L)を得た。この積層接着フィルムの接着フィルム面の算術平均表面粗さは、0.4μmで、表面粘着力はNo.5であった。
Claims (9)
- エチレン性二重結合および極性基を同一分子内に含む単量体を用いてグラフト変性した変性ポリオレフィン系樹脂を含有する粘着性を有する接着フィルムと、粘着性を有しない熱可塑性樹脂フィルムが積層されたフィルムであり、以下の条件を満たすことを特徴とするインサート成形用積層接着フィルム。
1)変性ポリオレフィン系樹脂の融点が120℃以上
2)変性ポリオレフィン系樹脂の融解熱量が20J/g以下
3)接着フィルム面の算術平均表面粗さが0.6μm以下
- 前記接着フィルムが、エチレン性二重結合および極性基を同一分子内に含む単量体と芳香族ビニル単量体を用いてグラフト変性した変性ポリオレフィン系樹脂を含有することを特徴とする請求項1記載のインサート成形用積層接着フィルム。
- 前記エチレン性二重結合および極性基を同一分子内に含む単量体が、(メタ)アクリル酸、無水マレイン酸、(メタ)アクリル酸グリシジルから選ばれる少なくとも1つであることを特徴とする請求項1または2記載のインサート成形用積層接着フィルム。
- その合計厚みが30~300μmであることを特徴とする請求項1~3記載のインサート成形用積層接着フィルム。
- 粘着性を有しない熱可塑性樹脂フィルムが、ポリアミド系樹脂フィルムであることを特徴とする請求項1~4記載のインサート成形用積層接着フィルム。
- インサート成形時に射出される樹脂がポリアミド系樹脂であることを特徴とする請求項1~5記載のインサート成形用積層接着フィルム。
- 粘着性を有しない熱可塑性樹脂フィルムが、ポリプロピレン系樹脂フィルムであることを特徴とする請求項1~4記載のインサート成形用積層接着フィルム。
- インサート成形時に射出される樹脂がポリプロピレン系樹脂であることを特徴とする請求項1~4及び請求項7記載のインサート成形用積層接着フィルム。
- 請求項1~8記載のインサート成形用積層接着フィルムを、粘着性を有する接着フィルム面が金属部材と接触するよう積層した後、加熱して接着フィルム部を溶融して金属部材と接着し、該インサート成形用接着フィルム積層金属部材を、粘着性を有しない熱可塑性樹脂フィルム面が金型内空隙側となるよう金型内に設置して、粘着性を有しない熱可塑性樹脂フィルムと同種の樹脂を射出成形するインサート成形方法。
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EP11837961.9A EP2636523A1 (en) | 2010-11-05 | 2011-10-31 | Laminated adhesive film for use in insert molding |
US13/882,888 US20130264741A1 (en) | 2010-11-05 | 2011-10-31 | Laminated adhesive film for use in insert molding |
KR1020137010449A KR20130129190A (ko) | 2010-11-05 | 2011-10-31 | 인서트 성형용 적층 접착 필름 |
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Also Published As
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CN104842502A (zh) | 2015-08-19 |
KR20130129190A (ko) | 2013-11-27 |
EP2636523A1 (en) | 2013-09-11 |
JP5755660B2 (ja) | 2015-07-29 |
US20130264741A1 (en) | 2013-10-10 |
JPWO2012060311A1 (ja) | 2014-05-12 |
CN103201111A (zh) | 2013-07-10 |
CN103201111B (zh) | 2015-04-29 |
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