WO2016142966A1 - 接着シート - Google Patents
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- WO2016142966A1 WO2016142966A1 PCT/JP2015/001336 JP2015001336W WO2016142966A1 WO 2016142966 A1 WO2016142966 A1 WO 2016142966A1 JP 2015001336 W JP2015001336 W JP 2015001336W WO 2016142966 A1 WO2016142966 A1 WO 2016142966A1
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- adhesive
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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
- C09J7/10—Adhesives in the form of films or foils without carriers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
- C08G63/183—Terephthalic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- 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
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/10—Homopolymers or copolymers of propene
- C09J123/12—Polypropene
-
- 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
- C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
- C09J167/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
- C09J201/00—Adhesives based on unspecified macromolecular compounds
-
- 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
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
-
- 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
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/405—Adhesives in the form of films or foils characterised by release liners characterised by the substrate of the release liner
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
-
- 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
- C09J2417/00—Presence of reclaimed rubber
-
- 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
- C09J2423/00—Presence of polyolefin
- C09J2423/10—Presence of homo or copolymers of propene
- C09J2423/105—Presence of homo or copolymers of propene in the release coating
-
- 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
- C09J2467/00—Presence of polyester
- C09J2467/005—Presence of polyester in the release coating
Definitions
- This invention relates to an improved adhesive sheet used when joining unvulcanized rubber to metal.
- Patent Document 1 when bonding a metal and an unvulcanized rubber through an adhesive, the adhesive is heated and pressurized to vulcanize the rubber, There is a method of bonding to metal.
- the solvent-dispersed vulcanized adhesive is obtained by dispersing or dissolving a filler, a crosslinking agent, a stabilizer, and the like in an organic mixed solvent in an adhesive polymer compound.
- a volatile organic compound hereinafter “VOC”
- VOC volatile organic compound
- Patent Document 2 as an adhesive sheet for joining unvulcanized rubber to metal, a release film made of a polymer compound, and a solvent having reactivity with rubber on one surface of the release film
- the coated adhesive layer was dried by applying a dispersion-type vulcanized adhesive, and after drying the coated adhesive layer, the reactivity of the metal on the surface opposite to the release film of the coated adhesive layer was increased. What is provided with the base-coat adhesive bond layer which applied and dried the adhesive which has is disclosed.
- This adhesive sheet is set with a metal to which the rubber is to be attached, and the upper surface of the adhesive sheet is fixed by pressing the surface opposite to the upper adhesive layer of the adhesive sheet against the metal.
- a rubber mat is placed on the release film, and the metal is heated while being uniformly pressurized.
- the release film of the adhesive sheet is peeled off from the overcoat adhesive layer.
- pressure is applied while heating the unvulcanized rubber so that the uncoated rubber is vulcanized and the top adhesive layer and the rubber are fixed together so that the rubber adheres to the metal. It functions.
- VOC since VOC is removed in advance at the manufacturing stage of the adhesive sheet, there is an advantage that VOC can be reduced when rubber is bonded to metal.
- JP 2001-260233 A Japanese Patent No. 4681634
- An adhesive sheet for joining unvulcanized rubber to a metal comprising a first film layer made of polypropylene and a second film layer made of polyethylene terephthalate, and a release film formed as an integral film, On the side of the first film layer of the release film, a topcoat adhesive layer obtained by applying and drying a solvent-dispersed vulcanized adhesive having reactivity with the unvulcanized rubber, and the topcoat adhesive layer
- a topcoat adhesive layer obtained by applying and drying a solvent-dispersed vulcanized adhesive having reactivity with the unvulcanized rubber, and the topcoat adhesive layer
- a step of heating a metal while placing a rubber mat on the film while uniformly pressing, a step of peeling the film from the overcoat adhesive layer after the undercoat adhesive layer is fixed to the metal, and a surface on which the film is peeled off The problem is solved by a method of bonding unvulcanized rubber to a metal comprising a step of pressing the unvulcanized rubber while heating to vulcanize the unvulcanized rubber and fixing the top adhesive layer and the rubber together.
- an adhesive sheet having a release film that is easy to peel off from the top adhesive layer but does not generate wrinkles.
- FIG. 1 and FIG. 2 show the configuration of the adhesive sheet 1 of the present invention.
- FIG. 1 shows a cross section of the adhesive sheet 1 of the present invention.
- an overcoat adhesive layer 11 is applied on a release film 10.
- a basecoat adhesive layer 12 is applied on the surface opposite to the surface on which the release film 10 is provided.
- FIG. 2 is an enlarged view of a part of the release film 10 in the adhesive sheet 1 of the present invention.
- the release film 10 includes a first film layer 10a made of polypropylene and a second film layer 10b made of polyethylene terephthalate.
- the release film 10 raises the temperature until it exceeds 100 degrees Celsius in the drying step after each of the top coating layer 11 and the base coating layer 12 is applied. For this reason, wrinkles are generated only after the topcoat adhesive layer 11 and the undercoat adhesive layer 12 are applied only with a polypropylene film having a low heat-resistant temperature. Polypropylene is soluble in ketone solvents. Therefore, the release film 10 is integrally formed as a single release film layer as a two-layer structure of a polypropylene film layer (first film layer) and a polyethylene terephthalate film layer (second film layer). Yes.
- a method of integrally forming a polypropylene film layer (first film layer) and a polyethylene terephthalate film layer (second film layer) as one release film layer for example, a method of bonding with an adhesive There is. That is, there is a method of forming the first film layer 10a and the second film layer 10b by press-bonding the adhesive 10c to either one of the first film 10a and the second film 10b.
- the adhesive 10c for example, an acrylic pressure-sensitive adhesive, which is a strong adhesive type adhesive having adhesiveness at room temperature, can be used.
- the first film 10a made of polypropylene has a thickness of 10 micrometers or more and 50 micrometers or less.
- the second film layer 10b which is polyethylene terephthalate, has a thickness in the range of greater than 10 micrometers and less than or equal to 300 micrometers.
- the first film layer 10a made of polypropylene functions to ensure releasability
- the second film layer 10b made of polyethylene terephthalate functions to reinforce the first film layer 10a. Therefore, the first film layer 10a may be selected to be thinner than the second film layer 10b.
- Another method for integrally forming a polypropylene film layer (first film layer) and a polyethylene terephthalate film layer (second film layer) as one release film layer is, for example, A method of forming a layer and a polyethylene terephthalate film layer by coextrusion is conceivable.
- a general coextrusion method can be used. These methods can be changed according to the purpose of use as follows. However, at least when the top coat adhesive layer 11 and the base coat adhesive layer 12 are formed, it is necessary to form them integrally as a release film. It is necessary that the top coat adhesive layer 11 and the base coat adhesive layer 12 are formed on the release film without any defects.
- the characteristic at the time of use of a release film layer can be varied with the way of the formation.
- the first film layer 10a and the second film layer 10b are formed as one release film layer
- the second film is applied after the top coat adhesive layer 11 and the undercoat adhesive layer 12 are applied to the release film.
- the 1st film layer 10a and the 2nd film layer 10b can be adhere
- the adhesive sheet can be used in a state where there is no hard second film layer 10b and the back is lined only with the soft first film layer 10a.
- the undercoat adhesive layer 12 when the undercoat adhesive layer 12 is attached to a metal, even if the place to be bonded is a complicated shape surface or the like, the undercoat adhesive layer 12 is bonded by the soft first film layer 10a only. It has features that are easy to adapt to the target shape. Moreover, since the soft 1st film layer 10a is excellent in mold release property, even after affixing the undercoat adhesive layer 12 to a metal, the top coat adhesive layer 11 is easy to peel off from a release film. An advantageous effect is obtained when the bonding target portion has a complicated shape.
- the first film layer 10a is soft when heated to a high temperature in order to bond the base coat adhesive layer 12 to metal and bond the top coat adhesive layer 11 to rubber. , Causing defects that easily cause wrinkles. Therefore, when the location to be bonded is not a complicated shape, the first film layer 10a and the second film layer 10b may be firmly fixed so that the second film layer 10b cannot be peeled from the first film layer 10a. .
- the second film layer 10b is firmly bonded to the first film layer 10a with an adhesive having medium to strong tackiness. In this case, the first film layer 10a and the second film layer 10b can be firmly fixed by coextrusion.
- the first film layer 10a and the second film layer 10b are in a state in which the second film layer 10b can be peeled from the first film layer 10a.
- the first film layer 10a and This is done by adjusting the degree of adhesion of the adhesive between the second film layer 10b.
- the adhesive strength can be changed by changing the amount of the additive added to the acrylic resin, or the adhesive strength can be changed by changing the acrylic resin component itself of the adhesive.
- a high crystal type polypropylene whose crystallinity is 60% or more of the total volume as the material of the first film 10a.
- a high crystal type polypropylene is used, the releasability is further improved.
- Polypropylene is selected as the first film 10a to which the top adhesive layer 11 is bonded and releasability is required, and this is reinforced with the second film 10b made of polyethylene terephthalate. It is possible to achieve rigidity that does not cause This cannot be achieved with other polymer films.
- the top coat adhesive layer 11 is formed on the first film 10 a side of the release film 10.
- the top adhesive layer 11 is formed by applying a solvent-dispersed vulcanized adhesive having reactivity with unvulcanized rubber and drying it.
- the solvent-dispersed vulcanized adhesive is defined as a polymer compound having adhesiveness in which a filler, a crosslinking agent, a stabilizer, and the like are dispersed or dissolved in an organic mixed solvent.
- the topcoat adhesive layer 11 include chlorosulfonated polyethylene, chlorinated natural rubber, maleimide compounds, nitroso compounds, acid supplements, crosslinkers and crosslink accelerators for CSM rubber, carbon black, silica filler, and the like. It is a layer by the adhesive of the component containing at least 1 or more.
- the undercoat adhesive layer 12 is applied on the overcoat adhesive layer 11.
- the undercoat adhesive layer 12 is applied with an adhesive having reactivity with a metal and dried.
- Examples of the undercoat adhesive layer 12 include phenol and phenol-based derivative resins, bisphenol-based epoxy resins, polyfunctional aromatic epoxy resins, chlorinated natural rubber, chlorinated polyethylene, chlorinated polypropylene, chlorinated polyolefin, acid supplements, This is a layer made of an adhesive containing at least one amine-based curing agent, silica-based filler, carbon black and the like.
- FIG. 3 is a schematic view of an apparatus for producing the adhesive sheet 1 of the present invention. The same applies to the formation of either the top coat adhesive layer 11 or the base coat adhesive layer 12.
- the XX cross section is in the state of FIG.
- the XX cross-section of FIG. 3 when forming the undercoat adhesive layer 12 after the application of the topcoat adhesive layer 11 is the completed adhesive sheet 1 as shown in FIG.
- FIG. 5 is a work flow diagram showing the flow of the manufacturing process of the adhesive sheet 1.
- the release film 10 is manufactured.
- Adhesive 10c is adhered to the second film 10b.
- the second film 10b may have an adhesive layer in advance.
- one surface of the first film 10a is brought into contact with the adhesive 10c, and is formed as one release film 10 while applying pressure by pressing.
- the formed release film 10 is adjusted into a roll shape and wound around the roller 5.
- the release film 10 is continuously supplied from the roller 5 at a constant speed.
- a “solvent dispersion type vulcanizing adhesive” having reactivity with the rubber 30 is applied on the surface of the first film 10a constituting the release film 10 (S101).
- a solvent-dispersed vulcanized adhesive is uniformly applied at a predetermined thickness on one surface of a release film 10 supplied from a roller 5 at a constant speed.
- Various methods are conceivable as a method for uniformly applying the solvent-dispersed vulcanized adhesive with a predetermined thickness. Coating using a coating roller, coating by a micro gravure roll coating method using a micro gravure (registered trademark) head disposed in a coating apparatus, and slot die coating method using a slot die head disposed in a coating apparatus.
- FIG. 3 shows a method of applying a solvent-dispersed vulcanized adhesive onto one surface of the release film 10 that is continuously supplied by the slot die 6. It is preferable to manage the coating thickness of the solvent-dispersed vulcanized adhesive so that the thickness of the finally formed topcoat adhesive layer 11 is in the range of about 10 to 30 micrometers.
- a layer of a solvent-dispersed vulcanized adhesive as shown in FIG. 3 is formed on the release film 10 at the location of the section XX in FIG.
- the adhesive is dried so as to evaporate the solvent of the volatile component (S102).
- high temperature dry gas 7 is sprayed and heated for a predetermined time.
- the adhesive is held at 80 degrees Celsius for about 1 minute, and then held at 120 degrees Celsius for 3 to 4 minutes.
- the top coat adhesive layer 11 of the solvent dispersion type vulcanized adhesive is formed on one surface of the release film 10.
- the release film 10 on which the top adhesive layer 11 is formed is wound around the roller 8 while being pressed by the laminating roller 9.
- the undercoat adhesive layer 12 is formed.
- the undercoat adhesive layer 12 first applies an adhesive having reactivity with a metal (S103).
- the method for forming the undercoat adhesive layer 12 is the same as that for forming the topcoat adhesive layer 11.
- the release film 10 on which the top coat adhesive layer 11 is formed is continuously fed from the roller 5 at a constant speed so that the top coat adhesive layer 11 is on the nozzle 6 side. To supply. An adhesive is applied with a predetermined thickness on the surface of the top coat adhesive layer 11 of the release film 10 that is continuously supplied by the slot die 6.
- a layer of a solvent-dispersed vulcanized adhesive as shown in FIG. 3 is formed on the release film 10 at the location of the section XX in FIG. After the application, the adhesive is dried so as to evaporate the solvent of the volatile component (S104). As shown in FIG. 3, it dries by spraying the hot dry gas 7.
- FIG. 3 As a result, as shown in FIG. 3, a top coat adhesive layer 11 of the solvent dispersion type vulcanized adhesive is formed on one surface of the release film 10, and a base coat adhesive layer 12 is further formed thereon. .
- the release film 10 formed with the top coat adhesive layer 11 and the base coat adhesive layer 12 is wound around the roller 8 while being pressed by the laminating roller 9. Thereby, the adhesive sheet 1 is completed.
- FIG. 6 is a representative example of a work flow diagram showing a process of bonding the metal 20 and the unvulcanized rubber 30 using the adhesive sheet 1.
- FIG. 7 is another representative example of a work flow diagram showing a process of bonding the metal 20 and the unvulcanized rubber 30 using the adhesive sheet 1.
- FIG. 8 and FIG. 9 are diagrams showing steps in bonding the metal 20 and the unvulcanized rubber 30 using the adhesive sheet 1.
- the adhesive sheet 1 is pressed onto the metal 20 to be bonded.
- the surface of the undercoat adhesive layer 12 on the side opposite to the overcoat adhesive layer 11 is pressed against the metal 20 and fixed (S201).
- the rubber mat 14 is placed on the release film 10 and the metal 20 is heated while being uniformly pressed to transfer the undercoat adhesive layer 12 to the metal 20 (S202).
- the release film 10 is peeled off from the overcoat adhesive layer 11, and the surface of the release film 10 is peeled off.
- Unvulcanized rubber 30 is placed. Thereafter, the rubber 30 and the top coat adhesive layer 11 are pressurized while being heated, and the top coat adhesive layer and the rubber are fixed together with vulcanization of the unvulcanized rubber (S204).
- the second film layer is previously formed before the step (S201) of pressing and fixing the surface of the undercoat adhesive layer 12 to the metal 20. 10b is peeled off from the first film layer 10a. That is, in a state where the release film 10 in FIG. 8 is the second film layer 10b, steps S201 to S204 are performed thereafter.
- the step shown in FIG. 8 is not performed as in the step shown in FIG.
- the process shown in FIG. 9 can also be performed directly. That is, the top coat adhesive layer 11 and the base coat adhesive layer 12 are peeled off in advance from the release film 10 (S301). Of the peeled top coat adhesive layer 11 and the base coat adhesive layer 12, the base coat adhesive layer 12 is brought into contact with the metal 20 (S302). On the other hand, the rubber mat 14 is placed on the top coat adhesive layer 11 (S302). And the rubber mat 14 can be pressurized and the top coat adhesive layer 11 and the undercoat adhesive layer 12 can be pressurized simultaneously.
- the release film 10 having good releasability can be formed, and wrinkles do not occur in the release film 10, so that wrinkles do not occur in the transferred top coat adhesive layer 11 and undercoat adhesive layer 12.
- the layer thickness of the top coat adhesive layer 11 and the base coat adhesive layer 12 becomes uniform.
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Abstract
Description
5,8 ローラ
9 ラミネートローラ
10 離型フィルム
10a 第1フィルム
10b 第2フィルム
11 上塗接着剤層
12 下塗接着剤層
Claims (10)
- 未加硫ゴムを金属に接合する接着シートであって、
ポリプロピレンからなる第一フィルム層とポリエチレンテレフタレートからなる第二フィルム層とからなり、一体的なフィルムとして形成されている離型フィルムと、
前記離型フィルムの前記第一フィルム層の側に、前記未加硫ゴムと反応性を有する溶剤分散型加硫接着剤の塗布を行って乾燥させた上塗接着剤層と、
前記上塗接着剤層の乾燥後に、前記上塗接着剤層の上に前記金属と反応性を有する接着剤の塗布を行って乾燥させた下塗接着剤層とを備えることを特徴とする接着シート。 - 請求項1に記載の接着シートであって、
前記第一フィルム層の厚さは、前記第二フィルム層の厚さより薄い接着シート。 - 請求項1または2に記載の接着シートであって、
前記一体的なフィルムは、前記第一フィルム層と前記第二フィルム層とのいずれか一方に接着剤を塗布して、前記第一フィルム層と前記第二フィルム層とを圧着させて形成されたものであって、
前記上塗接着剤層と前記下塗接着剤層とが前記離型フィルムに形成された後に、第一フィルム層と前記第二フィルム層とが剥離可能である接着シート。 - 請求項1または2に記載の接着シートであって、
前記一体的なフィルムは、前記第一フィルム層と前記第二フィルム層とを、共押出しによって形成したものである接着シート。 - 請求項1から4のいずれか一項に記載の接着シートであって、
前記第一フィルム層は、10マイクロメートル以上50マイクロメートル以下となる厚さを有し、
前記第二フィルム層は、10マイクロメートルから300マイクロメートルの範囲の厚さを有する接着シート。 - 請求項1から5のいずれか一項に記載の接着シートであって、
前記離型フィルムは、20マイクロメートルから30マイクロメートルの厚さである接着シート。 - 請求項1から6のいずれか一項に記載の接着シートであって、
前記接着シートは、前記金属を下側にした状態で、その上面に前記下塗接着剤層の前記上塗接着剤層と反対側の面を前記金属に押し付けて固定し、この状態で前記離型フィルム上に前記ゴムを載せて均一に加圧しながら金属を加熱し、金属に下塗接着剤層が固着した後に、前記フィルムを前記上塗接着剤層から剥がし、前記離型フィルムを剥がした面上に前記未加硫ゴムを加熱しながら加圧して前記未加硫ゴムの加硫とともに前記上塗接着剤層と前記ゴムとを固着させることを特徴とする接着シート。 - 請求項1から7のいずれか一項に記載の接着シートであって、
前記溶剤分散型加硫接着剤の塗布は、塗布装置に配置される塗布ヘッドから前記溶剤分散型加硫接着剤を、連続的に供給される前記フィルム上に吐出することにより行い、
前記金属と反応性を有する接着剤の塗布は、前記フィルム上に塗布された前記溶剤分散型加硫接着剤を所定時間加熱した後に、塗布装置に配置される塗布ヘッドから前記金属と反応性を有する接着剤を、連続的に供給される前記フィルム上に形成された前記上塗接着剤層の上に吐出することにより行うことを特徴とする接着シート。 - 請求項1から8のいずれか一項に記載の接着シートであって、前記上塗接着剤層の厚さは10マイクロメートルから30マイクロメートルの範囲であって、前記下塗接着剤層の厚さは5マイクロメートルから25マイクロメートルの範囲であることを特徴とする接着シート。
- 請求項1から9のいずれか一項に記載の接着シートにより、未加硫ゴムを金属に接合する方法であって、
前記方法は、
前記金属の上面に、前記接着シートの前記下塗接着剤層を前記金属の前記上面に押し付けて固定する工程と、
前記離型フィルム上を均一に加圧しながら前記金属を加熱する工程と、
前記金属に下塗接着剤層が固着した後に、前記フィルムを前記上塗接着剤層から剥がす工程と、
前記フィルムを剥がした前記上塗接着剤層の面上に前記未加硫ゴムを加熱しながら加圧して前記未加硫ゴムの加硫とともに前記上塗接着剤層と前記ゴムとを固着させる工程と、
を備えることを特徴とする接着方法。
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US20180057719A1 (en) | 2018-03-01 |
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