JP2011068822A - Adhesive film with separator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adhesive film with a separator that is easy to peel at a temperature of about 15-35°C and is excellent in workability of temporary attachment such that there is no gap between an adhesive layer and a separator at high temperatures. <P>SOLUTION: The adhesive film with a separator includes: a polyester separator (A) which comprises a polyester film and is obtained by applying a non-silicone-based mold release agent to at least one surface of the polyester film; and a film-like adhesive layer (B) including synthetic rubber as an indispensable component, wherein separator release force is 0.01-3.0 N/50 mm at 23°C and 6.0-50.0 N/50 mm at 80-130°C. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an adhesive film excellent in workability such as temporary workability using a non-silicone separator.

  FPC and R-F for the purpose of reinforcing FPC and R-F, as well as flexible printed wiring boards (hereinafter referred to as FPC), rigid flex wiring boards (hereinafter referred to as R-F), and multilayers of rigid wiring boards. A film adhesive is suitably used for bonding a glass epoxy composite substrate, a metal plate such as stainless steel, a metal foil, a plastic film such as polyimide, and the like. The adhesive film has a configuration in which a separator is laminated on one side or both sides of the film adhesive. Film adhesives need to be repaired when they are aligned with the adherend to be bonded. Therefore, it is difficult to repair if there are many tacks, and those with little tack at room temperature (25 ° C) are suitable. It is used.

  Examples of the separator used for the film adhesive include a separator coated with a general silicone release agent. However, in the case of a silicone release agent, a phenomenon in which the silicone resin composition moves to the adhesive layer occurs, which may cause siloxane gas generation, and may cause corrosion, malfunction, or malfunction inside the electronic device. . The amount of impurities such as volatile organic compounds such as siloxane gas and ionic impurities is kept to a relatively low level within the range where there are no practical problems. In the case of electronic device applications, it is not suitable because it is not designed to an extremely low level that can be sufficiently handled. In addition, with a silicone-based release agent, the release force is light, the separator and the adhesive layer are easily peeled off, and there is a problem that the separator may be peeled off during the operation of, for example, a slit when formed into a predetermined shape. Arise.

  As a separator that does not use a silicone release agent, there is a fluorine separator coated with a fluorine release agent, but it is expensive and has the disadvantage of low versatility. Furthermore, a fluorine release agent is applied. Since the release force of the separator is too low, it causes a problem of peeling as described above, which is not preferable.

  Further, when the adhesive film with a separator is bonded to an adherend such as a wiring board, temporary attachment is generally performed at a high temperature of 80 to 130 ° C. In the case where separators are attached to both surfaces, the temporary work is performed after removing one of the separators. This tacking work is generally bonded with a press or the like, but often, a high temperature such as 80 to 130 ° C. applied during the tacking work causes floating between the adhesive film and the separator, and bubbles may enter. is there. For this reason, wrinkles are generated due to the collapse of the remaining bubbles or bubbles after pressing, which may impair the appearance of the product.

  Further, since the separator needs to be peeled off after the adhesive and the adherend are temporarily attached, it is required that the adhesive film and the separator can be easily peeled off at a temperature of about 15 to 35 ° C. For this reason, when a polyester film or polyolefin film to which a release agent is not applied is used as a separator, there is a problem that floating does not occur in the tacking operation but cannot be peeled off at the above temperature.

  For applications to these wiring boards, etc., an adhesive film with a separator coated with a silicone-based release agent has been proposed, but it cannot be applied to parts where silicone-based separators cannot be used, such as around hard disks (Patent Literature). 1).

  Moreover, although there exists patent document 2 as an adhesive film with a separator using an alkyd type mold release agent, although the punching workability | operativity at room temperature is excellent, there exists a tendency for the tackiness at high temperature to be inferior and to raise easily. is there.

JP 2007-69380 A JP 2009-73971 A

  In view of the above, the present invention provides an adhesive film with a separator that is easy to peel off at a temperature of about 15 to 35 ° C., and has excellent temporary workability that does not float between the adhesive layer and the separator at a high temperature. For that purpose.

As a result of intensive studies, the present inventors have found that the above problems can be solved by the following means, and have reached the present invention.
The present invention includes [1] a polyester separator (A) comprising a polyester film, and a non-silicone release agent applied to at least one surface of the polyester film, and a film-like adhesive comprising a synthetic rubber as an essential component. The separator release force at 23 ° C. with the layer (B) is 0.01 to 3.0 N / 50 mm, and the separator release force at 80 to 130 ° C. is 6.0 to 50.0 N / 50 mm. It is related with the adhesive film with a separator characterized.
The present invention also provides: [2] a paper separator (C) obtained by applying a non-silicone release agent to a surface of a paper having a polyolefin film laminated on at least one side of the paper, and a film having a synthetic rubber as an essential component. The separator release force at 23 ° C. with the adhesive layer (B) is 0.01 to 3.0 N / 50 mm, and the separator release force at 80 to 130 ° C. is 6.0 to 50.0 N / 50 mm. The present invention relates to an adhesive film with a separator.
The present invention also provides [3] a paper separator (D) obtained by applying a non-silicone release agent to a surface of a paper having a polyester film laminated on at least one side of the paper, and a film having a synthetic rubber as an essential component. The separator release force at 23 ° C. with the adhesive layer (B) is 0.01 to 3.0 N / 50 mm, and the separator release force at 80 to 130 ° C. is 6.0 to 50.0 N / 50 mm. The present invention relates to an adhesive film with a separator.
[4] The separator-attached adhesive film according to any one of [1] to [3], wherein the non-silicone release agent is an alkyd release agent. The present invention relates to an adhesive film.

  The adhesive film with a separator of the present invention is easy to peel off at a temperature of about 15 to 35 ° C. and has a high release force at a high temperature, so that it does not float in a temporary press or punching operation at a high temperature. Moreover, since a non-silicone separator is used, it can be used for electronic materials such as a wiring board.

It is a figure explaining the measuring method of mold release force.

Hereinafter, the present invention will be described in more detail.
The polyester film used for the polyester separator (A) comprising the polyester film of the present invention and having a non-silicone release agent applied to at least one surface of the polyester film is composed of polyethylene terephthalate, ethylene terephthalate and ethylene isophthalate. Copolymer, polybutylene terephthalate and its copolymer, polytrimethylene terephthalate and its copolymer, polybutylene naphthalate and its copolymer, polyethylene naphthalate and its copolymer, polyhexamethylene naphthalate and its copolymer A polymer can be mentioned.
The thickness of the polyester film is preferably 5 to 200 μm, and more preferably 20 to 150 μm. When the thickness is 5 μm or more, the film tends to be difficult to tear when peeled, and when the thickness is 200 μm or less, the flexibility tends to be better.

Polyester separator (A) formed by applying a non-silicone release agent on at least one side of a polyester film used in the present invention, and a non-silicone release agent applied on a surface of a paper laminated with a polyolefin film on at least one side The release agent applied to the paper separator (D), and the paper separator (D) formed by applying a non-silicone release agent to the surface on which the polyester film is laminated on at least one side of the paper, There must be a non-silicone release agent. When a silicone-based mold release agent is used, there are problems associated with volatilization of low molecular silicones in specific electronic material applications. Furthermore, it is difficult to increase the releasing force at high temperatures.
As the non-silicone release agent, polyolefin and amino alkyd release agents are known, and amino alkyd release agents having a long-chain alkyl group are particularly preferable. The release agent layer may contain various additives such as other resin components, plasticizers and stabilizers.

The alkyd release agent used as the release agent in the present invention is preferably designed so that the wettability of the surface at 80 to 130 ° C. is high so that the separator release force at 80 to 130 ° C. is increased. Examples of this method include adjusting the crosslinking density and controlling the length of the long-chain alkyl group. That is, by adjusting the crosslink density of the amino alkyd resin and controlling the length of the long-chain alkyl group, the degree of freedom of the molecular chain greatly varies depending on the temperature, and as a result, the release force can be adjusted.
Alkyd release agents having such release power are available from Hitachi Chemical Polymer Co., Ltd. as “Tesfine” series of long-chain alkyl group-containing aminoalkyd resins. It can be obtained by using.

  The alkyd release agent is obtained by mixing an alkyd resin with a curing component such as an amino resin and curing it. Alkyd resins may be known ones, but coconut oil or coconut oil fatty acid, soybean oil or soybean oil having an acid value of 1 to 30 mgKOH / g, a hydroxyl value of 50 to 300 mgKOH / g, and an oil length of 5 to 60 It is preferable to use a fatty acid, castor oil or castor oil fatty acid. Further, these alkyd resins may be modified with an acrylic resin, a polyester resin, an epoxy resin, a phenol resin, or the like, or may be used as a mixture.

  Alkyd resin refers to a synthetic resin obtained by a condensation reaction of a polyhydric alcohol and a polybasic acid, an invertible alkyd modified with a condensate of a dibasic acid and a dihydric alcohol or a non-drying oil fatty acid, and a dibasic Any convertible alkyd that is a condensate of an acid with a trivalent or higher alcohol can be used. For the synthesis of alkyd resins, a polyhydric alcohol and a polybasic acid or a method in which a modifier is added thereto and heat-condensed are widely used. Examples of the polyhydric alcohol include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, and trimethylene. Dihydric alcohols such as glycol, tetramethylene glycol, and neopentyl glycol, trihydric alcohols such as glycerin, trimethylolethane, and trimethylolpropane, diglycerin, triglycerin, pentaerythritol, pentaerythritol, dipentaerythritol, mannitol Polyhydric alcohols such as sorbit can be used.

  Polybasic acids include phthalic anhydride, terephthalic acid, succinic acid, adipic acid, sebacic acid and other saturated polybasic acids, maleic acid, maleic anhydride, fumaric acid, itaconic acid, citraconic anhydride, isophthalic acid, An unsaturated polybasic acid such as trimellitic anhydride, a polybasic acid by Diels-Alder reaction such as cyclopentadiene-maleic anhydride adduct, terpene-maleic anhydride adduct, rosin-maleic anhydride adduct, and the like can be used. In addition, benzoic acid may be used in combination.

  Examples of the modifier include coconut oil, linseed oil, tung oil, castor oil, dehydrated castor oil, and fatty acids such as octylic acid, lauric acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, Leostearic acid, ricinoleic acid, dehydrated ricinoleic acid and the like can be used.

  The oil length of the alkyd resin is preferably 0 to 60, and more preferably 5 to 60. The acid value of the alkyd resin is preferably 1 to 30 mgKOH / g, and more preferably 5 to 25 mgKOH / g. The hydroxyl value of the alkyd resin is preferably 50 to 300 mgKOH / g, more preferably 100 to 250 mgKOH / g. In addition, these alkyd resins may be modified or mixed with acrylic resin, polyester resin, epoxy resin, phenol resin, or the like.

  An amino resin refers to a resin obtained by a condensation reaction between a compound containing an amino group and an aldehyde, and includes aniline aldehyde resin, urea resin, melamine resin, and the like. As the amino resin, various commercially available amino resins may be used, or they may be synthesized according to a known method. As a synthesis method, for example, various amino resins synthesized using a prepolymer containing methylol or an ether thereof as a raw material resin can be used. More specifically, various known materials such as methylated melamine resin, butylated melamine resin, methylated urea resin, butylated urea resin, methylated benzoguanamine resin, butylated benzoguanamine resin can be used. From the viewpoint, a methylated melamine resin, particularly a methyl melamine resin containing at least one methylol group per triazine nucleus as a main component is particularly preferable. A methylated melamine resin particularly preferably used as an amino resin is usually obtained by adding formalin to melamine under basic conditions, and further by subjecting methanol to an ether reaction under acidic conditions. The amount of imino group, methylol group, and methyl ether group, which are functional groups of the amino resin, can be controlled by the difference in the amount of the carboxylic acid. The amount of methylol group per triazine nucleus can be calculated by titration analysis and instrumental analysis. Specifically, it can be calculated by measuring with a nuclear magnetic resonance apparatus or elemental analysis apparatus.

  The method for applying the alkyd release agent is not particularly limited, but a method of laminating a film on which alkyd release agent has been applied and dried in advance and a laminate of paper and film (polyolefin, polyester) are prepared. And then applying an alkyd release agent. The coating method can be performed by a known method such as a roll coater, a reverse roll coater, a comma type coater, a gravure coater, an air knife coater, a die coater, or a bar coater.

  Although the thickness of a mold release agent layer is not specifically limited, It is preferable that it is 0.05-10 micrometers, More preferably, it is more preferable that it is 0.1-0.5 micrometer. If it is less than 0.05 μm, the release force becomes too heavy with time, and if it is thicker than 10 μm, the punching property is lowered.

  The release force between the polyester film separator (A), paper separator (C) and paper separator (D) used in the present invention and the adhesive layer (B) containing synthetic rubber as an essential component is 23 ° C., respectively. 0.01 to 3.0 N / 50 mm. If it is less than 0.01 N / 50 mm, it will peel off at the time of a slit operation | work, and the problem that a foreign material will adhere to an adhesive bond layer (B) will arise. On the other hand, if it exceeds 3.0 N / 50 mm, there is a problem that it is difficult to peel off when the separator is peeled off at a temperature of about 15 to 35 ° C. after the temporary attachment.

  The release force between the polyester film separator (A), paper separator (C) and paper separator (D) used in the present invention and the adhesive layer (B) containing synthetic rubber as an essential component is 80 to 130, respectively. It is 6.0 to 50.0 N / 50 mm at ° C. If it is less than 6.0 N / 50 mm, there is a problem in that floating tends to occur between the separator and the adhesive layer at a high temperature of 80 to 130 ° C. when temporarily attaching an adherend such as a wiring board and an adhesive film with a separator. Become. Moreover, when larger than 50.0 N / 50mm, there exists a tendency for the temporary attachment of adherends, such as a wiring board, and an adhesive bond layer to fall. Furthermore, it becomes easy to receive the influence of the thermal contraction by a separator, and there exists a tendency for curvature to generate | occur | produce a to-be-adhered body and an adhesive film.

As an adhesive composition of the adhesive layer (B) which essentially requires a synthetic rubber used in the present invention, an acrylic adhesive, a urethane adhesive, a polyester adhesive, a rubber adhesive, an epoxy adhesive, NBR adhesives and the like can be mentioned. In the present invention, a thermosetting adhesive containing a synthetic rubber is preferable because it can be firmly fixed to an adherend by being cured by heat treatment. Examples of the thermosetting adhesive include those obtained by adding a curing component such as an epoxy resin or a phenol resin and a curing agent such as a peroxide, dicyandiamide, or isocyanate.
As synthetic rubber, acrylic rubber (ACM), acrylonitrile butadiene rubber (NBR), isoprene rubber (IR), urethane rubber (U), ethylene propylene rubber (EPM, EPDM), epichlorohydrin rubber (CO, ECO), chloroprene rubber (CR) ), Silicone rubber (Q), styrene butadiene rubber (SBR), butadiene rubber (BR), fluoro rubber (FKM), polyisobutylene, and the like.
Synthetic rubber is an essential component because it contributes to the film forming ability, stress relaxation, fluidity, and adhesive strength of the adhesive layer, and is preferably contained in the adhesive in an amount of 5 to 100% by mass.

  When a thermosetting adhesive is used for the adhesive layer (B) used in the present invention, the thermosetting temperature varies depending on the thermosetting resin, but is usually 50 to 200 ° C., and the time required for thermosetting. Is 0.5 to 300 minutes.

  The thickness of the adhesive layer (B) used in the present invention can be arbitrarily set depending on the application and is not particularly limited, but is preferably in the range of 1 to 200 μm, more preferably 5 to 100 μm. .

  Since the adhesive composition used in the adhesive layer (B) used in the present invention is 15 to 35 ° C. and aligns with the adherend, it is preferable that the tack at 15 to 35 ° C. is low. The glass transition temperature (Tg) of the agent is preferably -30 to 200 ° C. If it is less than −30 ° C., the tackiness is high and the workability is lowered, which is not suitable for this application. Moreover, when Tg exceeds 200 ° C., it becomes difficult to align the adhesive layer (B) and the adherend. More preferably, Tg is 0 to 150 ° C.

  The adhesive composition used in the adhesive layer (B) used in the present invention includes additives such as fluorine-based and vinyl resin-based antifoaming agents, brominated epoxy compounds, and acid-modified brominated epoxy as necessary. It is possible to add flame retardants such as compounds, antimony compounds, phosphate compounds of phosphorous compounds, aromatic condensed phosphate esters, halogen-containing condensed phosphate esters, nitrogen-containing compounds, pigments, fillers, adhesion promoters, etc. it can.

  Moreover, you may mix | blend additives, such as a diluent, a plasticizer, antioxidant, a filler, and a tackifier, with the adhesive composition used for an adhesive bond layer (B) as needed.

  In the adhesive composition used for the adhesive layer (B), when diluting each component, a solvent such as toluene, ethyl acetate, methyl ethyl ketone, methanol, dimethyl sulfoxide may be used.

Examples of the separator paper used in the present invention include high-quality paper, kraft paper, roll paper, and glassine paper. High-quality paper is preferable. The thickness of the polyester separator (A), the paper separator (C), and the paper separator (D) is not particularly limited, but can be used in the range of 10 to 200 μm in consideration of the punching workability and the strength of the separator, The thing of the range of 25-150 micrometers is used. If the thickness is less than 10 μm, the separator is likely to be broken. If the thickness exceeds 200 μm, the separator is too thick, making it difficult to roll, and problems such as an increase in the amount of separator waste occur.
Examples of the polyester film laminated on at least one side of the paper include the above-described polyester film.
Lamination of film and paper is not particularly limited. For example, a film-formed film is laminated to paper using an adhesive, or a resin melted directly on paper is laminated using a T-die coating device. A method is mentioned.

  The polyolefin film of the paper separator (C) is not particularly limited, but a polyolefin polymerized using a low molecular weight monomer is desirable. Examples thereof include polyethylene resin, polypropylene resin, ethylene propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-methyl methacrylate copolymer, and mixtures thereof.

  The polyester film used for the paper separator (D) includes polyethylene terephthalate, a copolymer of ethylene terephthalate and ethylene isophthalate, polybutylene terephthalate and its copolymer, polybutylene naphthalate and its copolymer, polyhexamethylene Examples thereof include naphthalate and copolymers thereof.

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.
Example 1
As a polyester separator (A) made of a polyester film and coated with a non-silicone release agent on at least one side of the polyester film, an alkyd release agent (HKP1, Hitachi) on one side of a polyethylene terephthalate film (thickness 50 μm). Coated to a polyethylene terephthalate separator pre-coated with Kasei Polymer Co., Ltd., and an acrylic rubber adhesive (Hybon 8805, manufactured by Hitachi Chemical Polymer Co., Ltd.) as an adhesive layer (B) is dried to a thickness of 25 μm. And it dried and formed the adhesive bond layer (B) and obtained the adhesive film with a separator.

(1) Measurement of release force Polyimide (Kapton 200H, 50 μm, manufactured by Toray DuPont Co., Ltd.) is roll-laminated (100 ° C., linear pressure 5 kg / cm, laminating speed 1 m / min) on the surface of the adhesive layer where no separator is attached. ) Was used as a test piece, and after making the test piece width 50 mm, using a tensile tester (manufactured by Shimadzu Corporation), the structure shown in FIG. The release force was measured. The peeling temperature was 23 ° C., 80 ° C., and 130 ° C., the peeling speed was 300 mm / min, and the specimen width was 50 mm. The measurement value was calculated by reading the midpoint of the chart and rounding the numerical value of JIS Z 8401.

(2) Appearance after temporary attachment Vacuum laminator (TM-VR02, manufactured by Meisei Electric Co., Ltd.) capable of applying vacuum pressure to polyimide (Kapton 200H, 50 μm, manufactured by Toray DuPont Co., Ltd.) on the surface of the adhesive layer without the separator. ). After tacking, it was confirmed whether there were any abnormal appearance such as wrinkles and bubbles. No abnormality indicates that no wrinkles or bubbles are observed.

(Example 2)
Polypropylene film (thickness 20 μm) on one side of high-quality paper (basis weight 52 g) as a paper separator (C) formed by applying a non-silicone release agent to at least one side of a high-quality paper. Acrylic rubber adhesive (Hybon 8805, Hitachi Chemical Polymer Co., Ltd.) as an adhesive layer (B) on a paper separator in which an alkyd release agent (HKP1, manufactured by Hitachi Chemical Polymer Co., Ltd.) has been applied in advance to the laminated surface. The product was dried and coated to a thickness of 25 μm to form an adhesive layer (B) to obtain an adhesive film with a separator.

(Example 3)
A polyethylene terephthalate film (thickness 20 μm) on one side of high-quality paper (basis weight 52 g) as a paper separator (C) formed by applying a non-silicone release agent to the surface of a high-quality paper laminated on at least one side of a polyester film Acrylic rubber adhesive (Hybon 8805, Hitachi Chemical Polymer Co., Ltd.) as an adhesive layer (B) on a paper separator in which an alkyd release agent (HKP1, manufactured by Hitachi Chemical Polymer Co., Ltd.) has been applied in advance to the laminated surface. The product was dried and coated to a thickness of 25 μm to form an adhesive layer (B) to obtain an adhesive film with a separator.

Example 4
As a polyester separator (A) made of a polyester film and coated with a non-silicone release agent on at least one surface of the polyester film, an alkyd release agent (HKP2, Hitachi) on one surface of a polyethylene terephthalate film (thickness 38 μm). Coated to a polyethylene terephthalate separator pre-coated with Kasei Polymer Co., Ltd., and an acrylic rubber adhesive (Hybon 8805, manufactured by Hitachi Chemical Polymer Co., Ltd.) as an adhesive layer (B) is dried to a thickness of 25 μm. And drying to form an adhesive layer (B) to obtain an adhesive film with a separator.

(Comparative Example 1)
In Example 1, as the polyester separator (A), a polyethylene terephthalate separator (50E0010CTR-4, manufactured by Fujimori Kogyo Co., Ltd.) in which a silicone-based release agent was previously applied to one side of a polyethylene terephthalate film (thickness 50 μm) was used. Produced a separator-attached adhesive film in the same manner as in Example 1.

(Comparative Example 2)
An adhesive film with a separator was produced in the same manner as in Example 1 except that a polyethylene terephthalate film (thickness 50 μm) was used as the polyester separator (A) in Example 1.

(Comparative Example 3)
In Example 2, as a paper separator (C) formed by applying a non-silicone release agent to a surface of a high-quality paper laminated on at least one surface of a high-quality paper, An adhesive film with a separator was produced in the same manner as in Example 2, except that a separator (WHB80A, manufactured by Sanei Kaken Co., Ltd.) having a silicone release agent applied to the surface was used.

  The evaluation results and formulations obtained in Examples 1 to 4 and Comparative Examples 1 to 3 are summarized in Table 1.

From Table 1, Comparative Example 1 and Comparative Example 3 using a silicone release agent had low release force at 80 ° C. and 130 ° C., and bubbles were generated in the appearance after provisional attachment, resulting in NG. Further, in Comparative Example 2 where no release agent was applied, the separator could not be peeled off, and the temporary work could not be performed.
On the other hand, in the adhesive film with a separator coated with an alkyd mold release agent, as shown in Examples 1 to 4, there is no generation of wrinkles or bubbles after temporary attachment, and the appearance is excellent. At a temperature of about 0 ° C., the release force is small and the separator is easy to peel off.

Claims (4)

23 of a polyester separator (A) made of a polyester film and coated with a non-silicone release agent on at least one side of the polyester film, and a film-like adhesive layer (B) containing synthetic rubber as an essential component Separator release force at 0.01 ° C. is 0.01 to 3.0 N / 50 mm, and separator release force at 80 to 130 ° C. is 6.0 to 50.0 N / 50 mm. . A paper separator (C) formed by applying a non-silicone release agent to a surface of a paper having a polyolefin film laminated on at least one side of the paper, and a film-like adhesive layer (B) containing synthetic rubber as an essential component Separator adhesion with separator release force at 23 ° C. of 0.01 to 3.0 N / 50 mm and separator release force at 80 to 130 ° C. of 6.0 to 50.0 N / 50 mm the film. A paper separator (D) formed by applying a non-silicone release agent to a surface of a paper having a polyester film laminated on at least one side of the paper, and a film-like adhesive layer (B) containing synthetic rubber as an essential component Separator adhesion with separator release force at 23 ° C. of 0.01 to 3.0 N / 50 mm and separator release force at 80 to 130 ° C. of 6.0 to 50.0 N / 50 mm the film. The adhesive film with a separator according to any one of claims 1 to 3, wherein the non-silicone release agent is an alkyd release agent.

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