WO2017169451A1 - Surface protection film - Google Patents
Surface protection film Download PDFInfo
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- WO2017169451A1 WO2017169451A1 PCT/JP2017/007629 JP2017007629W WO2017169451A1 WO 2017169451 A1 WO2017169451 A1 WO 2017169451A1 JP 2017007629 W JP2017007629 W JP 2017007629W WO 2017169451 A1 WO2017169451 A1 WO 2017169451A1
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- WIPO (PCT)
- Prior art keywords
- protective film
- surface protective
- density polyethylene
- back layer
- layer
- Prior art date
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Classifications
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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
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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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- 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
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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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
- 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
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/06—Polyethene
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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
- C09J131/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Adhesives based on derivatives of such polymers
- C09J131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09J131/04—Homopolymers or copolymers of vinyl acetate
-
- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
Definitions
- the present invention relates to a surface protective film, and more particularly to a surface protective film excellent in transparency even after being heat-molded in a state of being bonded to a resin plate.
- Resin plates and metal plates are generally transported and transported with a surface protective film bonded to prevent scratches on the surface.
- the surface protective film is required to have an adhesive property that matches the adherend.
- the resin plate is often exposed to secondary processing such as printing and heat molding while the surface protective film is bonded, and suitability for heat molding is required.
- the use of resin plates such as polycarbonate and polymethyl methacrylate with such heat molding is diverse, including nameplates, bathtubs, helmets, and carrier bag exteriors.
- the surface protective film pasted on one side of the resin plate the surface opposite to the resin plate is subjected to processing such as printing or coating, and then laminated with another base resin sheet, and the surface protective film
- it is integrally molded at a temperature of 100 ° C. to 200 ° C. with the surface bonded with the product being the front surface of the product.
- the final products of these resin plates are often lined up in stores with the surface protective film bonded, and the beauty of the front surface with the surface protective film affects the appeal to customers. Therefore, the surface protective film may be required to have high transparency after heat molding in addition to followability to heat molding.
- the surface protection film using a general olefin-based resin for the back layer as shown in Patent Documents 1 and 2 has a high haze after heat molding and is far from the required high transparency.
- those using low density polyethylene for the back layer are suitable for heat molding because the film has a low tensile elastic modulus and stretches well when the film is pulled.
- the haze of the subsequent surface protective film is as high as 4 to 8%.
- the center line average roughness (Ra) of the surface roughness of the back surface layer is about 0.05 ⁇ m, the back surface layer and the adhesive layer of the surface protection film are difficult to slip, and air is trapped when the surface protection film is wound on the product roll. In some cases, the surface protective film is deformed and wrinkles occur when it is bonded to the resin plate.
- the object of the present invention is to eliminate the above-mentioned problems in the prior art, maintain high transparency with low haze after heat molding, and air inside the roll when the surface protective film is wound into a roll.
- An object of the present invention is to provide a surface protective film capable of suppressing stagnation and preventing deformation of the film.
- a surface protective film comprising an adhesive layer, an intermediate layer and a back layer, the back layer comprising a polyolefin resin composition containing 0.3 to 10% by weight of a fluorine-based mold release agent,
- the constituent resin is mainly low-density polyethylene, has a haze of 10% or less after heating at 160 ° C. for 1 minute or longer and gradually cooling, and a haze after heating and cooling at 200 ° C. for 1 minute or longer is 5%.
- a surface protective film characterized by: (2) The surface protective film according to (1), wherein the back layer has a centerline surface roughness (Ra) of 0.15 ⁇ m or less. (3) The surface protective film according to (1) or (2) above, wherein inorganic particles having a particle size of 5 ⁇ m or more are added to the back layer. (4) The surface protective film according to any one of (1) to (3), wherein the polyolefin resin of the back layer is a high-pressure low-density polyethylene having a density of 0.90 to 0.93 g / cm 3. . (5) The surface protective film according to any one of the above (1) to (3), wherein the polyolefin resin of the back layer is a polypropylene random copolymer.
- the low density polyethylene constituting the intermediate layer is a high pressure method low density polyethylene having a density of 0.90 to 0.93 g / cm 3 or a straight chain having a density of 0.88 to 0.93 g / cm 3.
- the surface protective film according to any one of the above (1) to (6), wherein the resin constituting the adhesive layer is an ethylene / vinyl acetate copolymer or linear low-density polyethylene.
- the surface protective film according to any one of the above (1) to (8) is bonded to one side of a resin plate made of polycarbonate or polymethyl methacrylate, and the printed layer and acrylonitrile / butadiene / A structure in which a styrene copolymer or polycarbonate is laminated.
- the surface protective film of the present invention has the following effects. (1) The surface protective film of the present invention has low haze after heat molding, and can maintain the appearance of the heat molded product beautifully. (2) The surface protective film of the present invention can be easily discharged of air entering between the films when the surface protective film is wound up, and the roll is not deformed due to air accumulation and is uniformly bonded to the adherend without wrinkles. can do.
- the surface protective film of the present invention is a laminated film comprising a back layer, an intermediate layer and an adhesive layer.
- Surface protection film used at the time of heat molding by suppressing the trouble of roll shape at the time of winding by making the surface protection films easy to slide with the back layer and expressing the characteristics of tensile strength under high temperature environment by the intermediate layer
- the adhesive layer can be designed independently of the intermediate layer and the back layer, focusing on the adhesive properties.
- the surface protective film of the present invention is applied to the surface of a resin plate made of polycarbonate, polymethyl methacrylate resin, etc., and then the resin plate is heat-molded to continue protecting the surface until the final product using the resin plate Therefore, at the time of heat molding, it is necessary not to be broken while following the resin plate, and to maintain a beautiful surface of the final product with the resin plate exposed on the surface.
- the adhesive layer of the surface protective film of the present invention can be co-extruded and laminated with the intermediate layer and the back layer by an inflation method such as ethylene / vinyl acetate copolymer or linear low density polyethylene, or a T-die method. Any resin may be used. However, in consideration of molding in an environment of 100 ° C. to 200 ° C., linear low-density polyethylene that is less prone to sticking by heating is particularly preferably used.
- linear low density polyethylene examples include ethylene / butene copolymer, ethylene / pentene copolymer, ethylene / hexene copolymer, ethylene / 4-methyl-1-pentene copolymer, and ethylene / octene copolymer.
- a polymer etc. can be mentioned.
- terpene resin groups such as hydrogenated terpene phenol and terpene styrene resin, tackifiers such as rosins such as polymerized rosin and hydrogenated rosin, styrene elastomers and urethane elastomers, etc. May be added, and various additives such as an ultraviolet absorber may be added as long as the adhesiveness is not impaired.
- the intermediate layer in the present invention is required to be resistant to tearing of the surface protective film during heat molding and to have low haze after heat molding.
- the resin constituting the intermediate layer is mainly composed of low-density polyethylene that hardly undergoes crystallization even during slow cooling from a high temperature (100 ° C. to 200 ° C.) or that does not easily form large-size crystals. is important.
- “mainly” means that the main raw material is contained in an amount of 50% by weight or more.
- the edge or the like is reused as a recovered raw material in the intermediate layer.
- the recovered raw material and the new raw material are blended based on the above guidelines.
- the resin constituting the intermediate layer in the present invention mainly composed of low-density polyethylene, the center line surface roughness (Ra) of the back layer described later can be reduced, and the glossy surface without dullness.
- a protective film can be obtained.
- low density polyethylene high pressure method low density polyethylene or linear low density polyethylene is preferably used, but both resins have low tensile elastic modulus compared to other materials and excellent elongation of the film during heat molding. Because of its excellent transparency and low haze, it is optimally used for the required characteristics during heat molding.
- the high-pressure low-density polyethylene used for the intermediate layer of the surface protective film of the present invention preferably has a density in the range of 0.90 to 0.93 g / cm 3 . If the density of the low density polyethylene is more than 0.93 g / cm 3 , the crystal size increases in the annealing step after heat molding, and the amount of incident light that is scattered / reflected and transmitted is reduced. It will be high. If the density of the high-pressure low-density polyethylene is less than 0.90 g / cm 3 , it will have properties similar to rubber, and the elongation at break will be too high to cut the surface protective film.
- the density of the linear low density polyethylene used for the intermediate layer of the surface protective film of the present invention is preferably in the range of 0.88 to 0.93 g / cm 3 .
- the reason for the upper limit and the lower limit is the same as in the case of using the high pressure method low density polyethylene.
- the tensile elastic modulus is remarkably lowered and the surface protective film becomes softer than when high-density polyethylene or polypropylene is used. . If the surface protective film is soft, air is difficult to escape when the film is wound up as a product roll after film formation. If the surface protective film is bonded to the adherend while it is deformed, wrinkles and protrusions may enter and the appearance may not be good, and unexpected problems may occur during heat molding. Therefore, the back layer is designed as follows.
- the back layer in the present invention comprises a polyolefin resin composition containing 0.3 to 10% by weight of a fluorine-based mold release agent.
- a fluorine-based mold release agent When the addition amount of the fluorine-based mold release agent is less than 0.3% by weight, the slippage between the surface protection films is poor, and when the film is wound up as a product roll after film formation, it is difficult for air to escape and air accumulation occurs.
- the surface protection film may be deformed. Further, even if 10% by weight or more is added, the effect of slipperiness is peaked, and on the contrary, it may be scattered at the time of film formation or deposited on the die to contaminate the process.
- the polyolefin resin used for the back layer is not particularly limited as long as it can be co-extruded and laminated with an intermediate layer resin or adhesive layer resin and a T-die or inflation die.
- a copolymer is desirable.
- linear low-density polyethylene stickiness appears on the back layer, and when the surface protective film is wound up in a roll shape, the air inside the roll does not escape and air accumulation occurs, causing the film to deform, and the adherend Wrinkles will be included when pasting to the product, detracting from the beauty of the product.
- high-density polyethylene it is not desirable because the surface protection film comes into contact with and rubbing with the guide roll during winding or laminating, and the resin is scraped and white powder appears.
- the high-pressure low-density polyethylene used for the back layer in the present invention preferably has a density in the range of 0.90 to 0.93 g / cm 3 . If the density is more than 0.93 g / cm 3 , the crystal size increases in the slow cooling stage after heat forming, and the amount of incident light that is scattered and reflected more and transmitted is reduced, resulting in an increase in haze. . Conversely, if it is less than 0.90 g / cm 3, it will have properties similar to rubber, and when used for the back layer, the resin will become sticky and sticky, and the surface protection film will be rolled. When the film is wound on, the air inside the roll does not escape and air accumulation occurs and the film is deformed. In addition, the breaking elongation becomes too high and the surface protective film cannot be cut.
- the polypropylene-based random copolymer used for the back layer in the present invention is specifically an ethylene / propylene random copolymer (hereinafter referred to as “EPC”) which is a copolymer of a propylene monomer and an ethylene monomer.
- EPC ethylene / propylene random copolymer
- EPBC ethylene / propylene / butene random copolymer
- a fluorine-based mold release agent is used that does not increase the surface roughness of the film and keeps the haze low, and the resin is not easily deteriorated even at a high temperature and is not easily removed from the back layer.
- fluorine-based mold release agent examples include polyvinylidene fluoride, chlorotrifluoroethylene / ethylene copolymer, tetrafluoroethylene / hexafluoropropylene copolymer, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, ethylene / tetra Fluoroethylene copolymers, tetrafluoroethylene / perfluoroalkoxyethylene copolymers, terpolymers made of tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride, and polyfluorohydrocarbon groups and polyoxyethylene groups Mention may be made of fluorine-containing compounds.
- examples of the fluorine-containing compound having a polyfluorohydrocarbon group and a polyoxyethylene group include a (meth) acrylic acid ester having a C 1-18 perfluoroalkyl group as the monomer (a). It can be obtained by copolymerizing the monomers (b) and (c) described later with (meth) acrylic acid ester having a polyoxyethylene group.
- fluorine-based release agents the above-mentioned fluorine-containing compounds having a polyfluorohydrocarbon group and a polyoxyethylene group are preferable because they do not cause transfer contamination to the adhesive layer and are excellent in unwinding characteristics.
- the perfluoroalkyl group of the monomer (a) preferably has 1 to 18 carbon atoms, more preferably 1 to 6 carbon atoms. Such a perfluoroalkyl group may be linear or branched. These may be used alone or in combination of two or more.
- Such (meth) acrylic acid ester having a perfluoroalkyl group is commercially available from Kyoeisha Chemical Co., Ltd., or can be synthesized by a known method using a commercially available fluorine-containing compound as a raw material.
- the monomer (b) having a polyoxyethylene group those having a structure in which oxyethylene units (—CH 2 —CH 2 —O—) are linked in an amount of 1 to 30 are preferable. Those are more preferred.
- the chain may have an oxypropylene unit (—CH 2 —CH (CH 3 ) —O—).
- Preferable examples include polyethylene glycol monomethacrylate having 8 oxyethylene units.
- the monomer (b) may be used alone or in combination of two or more.
- Another monomer (c) having a polyoxyethylene group is a di (meth) having a structure in which 1 to 30 oxyethylene units are linked and having double bonds at both ends.
- Examples of acrylates and preferred specific examples include polyethylene glycol dimethacrylate having 8 linkages.
- Such monomer (c) can also be used alone or in combination of two or more.
- each of the monomers (a), (b), and (c) are as follows: monomer (a) is 1 to 80% by weight, monomer (b) is 1 to 80% by weight, monomer (C) is preferably 1 to 50% by weight.
- inorganic particles are preferably added to the back layer of the surface protective film of the present invention, and silica or zeolite having a particle size of 5 ⁇ m or more, preferably 6 to 20 ⁇ m, more preferably 7 to 15 ⁇ m is suitably used.
- the center line surface roughness (Ra) of the back layer of the present invention is preferably 0.15 ⁇ m or less.
- the center line surface roughness (Ra) of the back layer is higher than 0.15 ⁇ m, incident light is irregularly reflected on the surface of the back layer, the surface protection film looks dull, and the beauty of the surface protection film is impaired.
- Setting the center line surface roughness of the back layer to 0.15 ⁇ m or less is mainly made of a polyolefin resin used for the back layer that is difficult to crystallize, such as a high-pressure low-density polyethylene or a polypropylene random copolymer, This can be achieved by making the resin constituting the intermediate layer mainly composed of low-density polyethylene.
- the surface protective film of the present invention has a haze after heating and annealing at 160 ° C. of 1 minute or more and 10% or less, and a haze after heating and annealing at 200 ° C. of 1 minute or more is 5% or less. It is characterized by.
- the haze after heating and slow cooling under each condition is higher than 10% and 5%, the transparency is poor and the beauty of the adherend cannot be visually recognized.
- gradual cooling refers to cooling from room temperature to room temperature by simply immersing it in water, for example, without rapidly cooling, without using a special cooling method, simply by air cooling, spraying, or simply leaving it alone. Represents what to do.
- the resin constituting the intermediate layer is mainly composed of low-density polyethylene, and the resin constituting the back layer is subjected to the slow cooling step after thermoforming. This can be achieved by selecting from low density polyethylene or polypropylene random copolymer that does not increase the crystal size, and setting the center line surface roughness (Ra) of the back layer to 0.15 ⁇ m or less.
- the thickness of the surface protective film of the present invention is preferably 30 to 90 ⁇ m from the viewpoint of handling, and the ratio of the thickness of the back layer, the intermediate layer and the adhesive layer to the thickness of the surface protective film is 5 to 20%: 50 to 80 %:
- the range of 10 to 45% is preferable from the balance of mechanical properties and adhesive properties, and more preferably 7 to 10%: 65 to 75%: 15 to 25%.
- the surface protective film of the present invention is an antistatic material for preventing static electricity generated when the surface protective film is peeled, within a range that does not impair transparency, glossiness, surface roughness, and spreadability during heat molding. It is also possible to add an agent, recovery of excess film generated during the formation of the surface protective film, a pigment for coloring the film, an antioxidant for preventing thermal deterioration during heat molding, and the like.
- the surface protective film is stored for 3 days or more after creation in a room temperature of 23 ° C. and in a humidity of 50 RH%, and then a polycarbonate plate “Panlite” manufactured by Teijin Limited having a thickness of 0.5 mm and a width of 50 mm. It was pasted at a pasting pressure of 9,100 N / m and a pasting speed of 300 cm / min. Thereafter, it is stored for 15 minutes in each of the hot air dryers that have been kept at 100 ° C., 120 ° C., 140 ° C., and 160 ° C., and for 2 minutes in each of the hot air dryers that are kept at 180 ° C. and 200 ° C. After storing and taking out a sample from a hot air dryer, after storing for 24 hours at 23 degreeC atmosphere, the surface protection film was peeled off and the haze of the surface protection film was measured.
- Friction coefficient The surface protective film was stored for 3 days or more after preparation in a room temperature of 23 ° C. and a humidity of 50 RH%, and then the back layer surface and the adhesive layer surface of the surface protective film were overlapped to measure the friction coefficient. .
- Example 1 87% by weight of high-pressure low-density polyethylene having a density of 0.924 g / cm 3 and MFR (Melt Flow Rate) at 190 ° C. of 4.5 g / 10 minutes, and an average particle diameter of 88% by weight of the low-density polyethylene
- a composition comprising 13% by weight of a master batch of a mixed composition comprising 6% by weight of 11 ⁇ m silica and 6% by weight of a fluorine-containing compound having a polyfluorohydrocarbon group and a polyoxyethylene group is used as the back layer, and the density is 0.924 g. / cm 3, MFR under 190 ° C.
- a high-pressure low-density polyethylene is 7.5 g / 10 min and an intermediate layer, density 0.922 g / cm 3, linear ethylene-hexene copolymer having a melting point of 121 ° C.
- the back layer thickness ratio is 8%
- the intermediate layer thickness is 72%
- the adhesive layer thickness ratio is 20%
- the total thickness is 4
- a coextruded surface protective film was prepared to have a thickness of 0 ⁇ m.
- a fluorine-containing compound having a polyfluorohydrocarbon group and a polyoxyethylene group is a C 6 F 13 perfluorocarbon monomer as monomer (a).
- Example 2 As a back layer, a propylene / ethylene / butene random copolymer (EPBC) having a density of 0.900 g / cm 3 and a melting point of 148 ° C., 87% by weight, 88% by weight of EPBC and 6% by weight of silica having an average particle diameter of 11 ⁇ m,
- EPBC propylene / ethylene / butene random copolymer
- Example 1 A surface protective film was prepared in the same manner as in Example 1 except that 13% by weight of a master batch of a mixed composition comprising 6% by weight of a fluorine-containing compound having the same polyfluorohydrocarbon group and polyoxyethylene group was used. .
- Example 3 The density is linear low density polyethylene 87 wt% which is 0.920 g / cm 3 as an adhesive layer, terpene resin 3 wt% is a tackifier, and high-pressure low density polyethylene having a density of 0.924 g / cm 3 A surface protective film was prepared in the same manner as in Example 1 except that an adhesive layer-forming resin composition consisting of 10% by weight was used and a linear low density polyethylene having a density of 0.930 g / cm 3 was used as the intermediate layer. .
- Example 4 A surface protective film was prepared in the same manner as in Example 2 except that a linear low density polyethylene having a density of 0.930 g / cm 3 was used as the intermediate layer.
- Example 5 Silica having 87% by weight of low density polyethylene having a density of 0.900 g / cm 3 , 88% by weight of the low density polyethylene, 6% by weight of a fluorine-containing compound having polyfluorohydrocarbon groups and polyoxyethylene groups, and a particle size of 10 ⁇ m a composition comprising the masterbatch 13% by weight consisting of 6 wt% and the back layer, the linear low density polyethylene density is 0.880 g / cm 3 as an intermediate layer, density of 0.922 g / cm 3 A linear low density polyethylene is used as an adhesive layer and a T-die type composite film forming machine is used. The back layer thickness ratio is 8%, the intermediate layer thickness is 72%, the adhesive layer thickness ratio is 20%, and the total thickness. A co-extruded surface protective film was prepared so as to be 40 ⁇ m.
- CH 2 CHCOOC 2 H 4 C 8 F 17 is 10 as the perfluoroalkyl acrylate of the monomer (a).
- Example 6 87% by weight of high-pressure low-density polyethylene having a density of 0.930 g / cm 3 , 6% by weight of a fluorine-containing compound having a polyfluorohydrocarbon group and a polyoxyethylene group as in Example 5, and a particle size of 10 ⁇ m
- a composition comprising 13% by weight of a masterbatch containing 7% silica (the base resin is the high-pressure low-density polyethylene) is used as a back layer, and a linear low-density polyethylene having a density of 0.930 g / cm 3 is used as an intermediate layer.
- composition comprising 90% by weight of a linear low density polyethylene having a density of 0.922 g / cm 3 and 10% by weight of a masterbatch of 20% by weight of a terpene tackifier (the base resin is the above linear low density polyethylene).
- the back layer thickness ratio is 8%
- the intermediate layer thickness is 72%
- the adhesive layer thickness ratio is 20%
- the total thickness is So as to be 0 ⁇ m created a coextruded surface protective film.
- Example 7 Silica having a density of 0.900 g / cm 3 and a melting point of 145 ° C. of 87% by weight of EPBC, a fluorine-containing compound having the same polyfluorohydrocarbon group and polyoxyethylene group as in Example 2, and a particle size of 10 ⁇ m a composition comprising the masterbatch 13% by weight, containing 7% and the back layer, the linear low density polyethylene density is 0.880 g / cm 3 as an intermediate layer, density of 0.922 g / cm 3 straight Using a T-die type composite film forming machine with a chain low density polyethylene as the adhesive layer, the back layer thickness ratio is 8%, the intermediate layer thickness is 72%, the adhesive layer thickness ratio is 20%, and the total thickness is 40 ⁇ m. A coextruded surface protective film was prepared so that
- a pressure-sensitive adhesive layer comprising a composition comprising 90% by weight of a linear low density polyethylene having a density of 0.910 g / cm 3 and 10% by weight of a styrene / ethylene / butylene / styrene copolymer (abbreviated as SEBS).
- SEBS styrene / ethylene / butylene / styrene copolymer
- Example 9 94% by weight of high-pressure low-density polyethylene having a density of 0.924 g / cm 3 , 6% by weight of a fluorine-containing compound having the same polyfluorohydrocarbon group and polyoxyethylene group as in Example 1, and a particle size of 11 ⁇ m
- a surface protective film was prepared in the same manner as in Example 1 except that a composition comprising 6% by weight of a master batch containing 6% of silica (the base resin was the above-described high-pressure low-density polyethylene) was used as the back layer.
- Density is the back layer of high density polyethylene is 0.964 g / cm 3
- density of the high-pressure low-density polyethylene is 0.924 g / cm 3 as an intermediate layer
- linear density 0.922 g / cm 3 Low Using a T-die type composite film forming machine with density polyethylene as the adhesive layer, the back layer thickness ratio is 8%, the intermediate layer thickness is 72%, the adhesive layer thickness ratio is 20%, and the total thickness is 40 ⁇ m.
- a coextruded surface protective film was prepared.
- Comparative example 2 Comparative Example 1 except that the composition of the back layer was a propylene / ethylene block copolymer (abbreviated as B-PP) containing 15% by weight of an ethylene / propylene copolymer as a rubber component having a density of 0.900 g / cm 3. Similarly, a surface protective film was prepared.
- B-PP propylene / ethylene block copolymer
- a composition comprising 15.5% by weight of low-density polyethylene and 0.5% by weight of silica having a particle size of 3 ⁇ is used as a back layer and an intermediate layer, and a linear low-density polyethylene having a density of 0.922 g / cm 3 is used as an adhesive layer.
- Using a T-die type composite film forming machine coextruded surface protective film so that the back layer thickness ratio is 8%, the intermediate layer thickness is 72%, the adhesive layer thickness ratio is 20%, and the total thickness is 40 ⁇ m. Created.
- a composition consisting of 13% by weight of a master batch containing 7% of 10 ⁇ m silica (the base resin is the above-mentioned linear low density polyethylene) is used as the back layer, the density is 0.900 g / cm 3 , and ethylene / propylene is used as the rubber component.
- a co-extruded surface protective film was prepared so that the ratio was 8%, the intermediate layer thickness was 72%, the adhesive layer thickness ratio was 20%, and the total thickness was 40 ⁇ m.
- Tables 1 and 2 show the evaluation results of Examples 1 to 9 and Comparative Examples 1 to 5.
- LDPE refers to high-pressure low-density polyethylene
- LLDPE linear low-density polyethylene
- EVA ethylene / vinyl acetate copolymer
- EPBC propylene / ethylene / butene random copolymer
- Polymer refers to B-PP refers to propylene / ethylene block copolymer.
- the surface protective films obtained in Examples 1 to 9 all had a haze of less than 10% after heating at 160 ° C. and slow cooling, and less than 5% after heating at 200 ° C. and slow cooling. It is 15 ⁇ m or less, and there is no concern that the surface protective film after heat molding becomes cloudy and impairs transparency, and the appearance of final products such as helmets and carrier bag exteriors is not impaired.
- the coefficient of friction is 1.5 or less for both static friction coefficient and dynamic friction coefficient.
- the surface protective films obtained in the comparative examples all have a haze of 10% or more and a center line average roughness of 0.15 ⁇ m or more, and the transparency is insufficient, which impairs the appearance of the final product.
- the surface protective film obtained in Comparative Example 4 has both a static friction coefficient and a dynamic friction coefficient exceeding 1.5 and poor transparency, and air trapping occurs when the surface protective film is wound on a roll. The surface protective film is deformed, and all the required characteristics cannot be satisfied.
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Abstract
Description
(1)粘着層、中間層および背面層からなる表面保護フィルムであって、背面層はフッ素系離型剤を0.3重量%~10重量%含有したポリオレフィン樹脂組成物からなり、中間層を構成する樹脂は低密度ポリエチレンを主体としてなり、160℃で1分以上加熱し徐冷した後のヘイズが10%以下であり、200℃で1分以上加熱し徐冷した後のヘイズが5%以下であることを特徴とする表面保護フィルム。
(2)前記背面層の中心線表面粗さ(Ra)が0.15μm以下である、上記(1)記載の表面保護フィルム。
(3)前記背面層に粒径が5μm以上の無機粒子が添加されてなる、上記(1)または(2)に記載の表面保護フィルム。
(4)前記背面層のポリオレフィン樹脂が、0.90~0.93g/cm3の密度を有する高圧法低密度ポリエチレンである、上記(1)~(3)のいずれかに記載の表面保護フィルム。
(5)前記背面層のポリオレフィン樹脂が、ポリプロピレン系ランダム共重合体である、上記(1)~(3)のいずれかに記載の表面保護フィルム。
(6)前記中間層を構成する低密度ポリエチレンが、0.90~0.93g/cm3の密度を有する高圧法低密度ポリエチレンまたは0.88~0.93g/cm3の密度を有する直鎖状低密度ポリエチレンである、上記(1)~(5)のいずれかに記載の表面保護フィルム。
(7)前記粘着層を構成する樹脂が、エチレン・酢酸ビニル共重合体または直鎖状低密度ポリエチレンである、上記(1)~(6)のいずれかに記載の表面保護フィルム。
(8)前記フッ素系離型剤が、ポリフルオロ炭化水素基およびポリオキシエチレン基を有する含フッ素化合物である上記(1)~(7)のいずれかに記載の表面保護フィルム。
(9)上記(1)~(8)のいずれかに記載の表面保護フィルムがポリカーボネートまたはポリメタクリル酸メチルからなる樹脂板の片面に貼合され、その反対面に印刷層およびアクリルニトリル・ブタジエン・スチレン共重合体またはポリカーボネートが積層された構造体。
(10)上記(9)に記載の構造体を表面保護フィルムが貼合された面をおもて面として加熱成型して得られる成型体。 As a result of intensive research and development in order to solve the above problems, the present inventor has found that the object can be achieved by adopting the following configuration of the present invention.
(1) A surface protective film comprising an adhesive layer, an intermediate layer and a back layer, the back layer comprising a polyolefin resin composition containing 0.3 to 10% by weight of a fluorine-based mold release agent, The constituent resin is mainly low-density polyethylene, has a haze of 10% or less after heating at 160 ° C. for 1 minute or longer and gradually cooling, and a haze after heating and cooling at 200 ° C. for 1 minute or longer is 5%. A surface protective film characterized by:
(2) The surface protective film according to (1), wherein the back layer has a centerline surface roughness (Ra) of 0.15 μm or less.
(3) The surface protective film according to (1) or (2) above, wherein inorganic particles having a particle size of 5 μm or more are added to the back layer.
(4) The surface protective film according to any one of (1) to (3), wherein the polyolefin resin of the back layer is a high-pressure low-density polyethylene having a density of 0.90 to 0.93 g / cm 3. .
(5) The surface protective film according to any one of the above (1) to (3), wherein the polyolefin resin of the back layer is a polypropylene random copolymer.
(6) The low density polyethylene constituting the intermediate layer is a high pressure method low density polyethylene having a density of 0.90 to 0.93 g / cm 3 or a straight chain having a density of 0.88 to 0.93 g / cm 3. The surface protective film according to any one of the above (1) to (5), which is a low-density polyethylene.
(7) The surface protective film according to any one of the above (1) to (6), wherein the resin constituting the adhesive layer is an ethylene / vinyl acetate copolymer or linear low-density polyethylene.
(8) The surface protective film according to any one of the above (1) to (7), wherein the fluorine-based mold release agent is a fluorine-containing compound having a polyfluorohydrocarbon group and a polyoxyethylene group.
(9) The surface protective film according to any one of the above (1) to (8) is bonded to one side of a resin plate made of polycarbonate or polymethyl methacrylate, and the printed layer and acrylonitrile / butadiene / A structure in which a styrene copolymer or polycarbonate is laminated.
(10) A molded body obtained by heat-molding the structure according to (9) above with a surface on which a surface protective film is bonded as a front surface.
(1)本発明の表面保護フィルムは、加熱成型後のヘイズが低く、加熱成型された製品の外観を美麗に保つことができる。
(2)本発明の表面保護フィルムは、表面保護フィルムの巻き取り時にフィルム間に入る空気の排出がされやすく、ロールに空気だまりによる変形がなく、被着体に対して均一にシワなく貼合することができる。 The surface protective film of the present invention has the following effects.
(1) The surface protective film of the present invention has low haze after heat molding, and can maintain the appearance of the heat molded product beautifully.
(2) The surface protective film of the present invention can be easily discharged of air entering between the films when the surface protective film is wound up, and the roll is not deformed due to air accumulation and is uniformly bonded to the adherend without wrinkles. can do.
本発明の表面保護フィルムは、背面層、中間層および粘着層からなる積層フィルムである。背面層により表面保護フィルム同士を滑りやすくすることで巻取り時のロール形状の不具合を抑制し、中間層により高温環境下の引っ張り強度の特徴を発現させることで加熱成型時に使用される表面保護フィルムとして好適に取り扱えるようにすることができ、粘着層は被着体との相性を考慮して粘着特性を中心に中間層、背面層とは独立に設計を行うことができる。 Hereinafter, the present invention will be described in detail together with embodiments.
The surface protective film of the present invention is a laminated film comprising a back layer, an intermediate layer and an adhesive layer. Surface protection film used at the time of heat molding by suppressing the trouble of roll shape at the time of winding by making the surface protection films easy to slide with the back layer and expressing the characteristics of tensile strength under high temperature environment by the intermediate layer In consideration of compatibility with the adherend, the adhesive layer can be designed independently of the intermediate layer and the back layer, focusing on the adhesive properties.
表面保護フィルムを、作成後3日以上、室温23℃、湿度50RH%雰囲気下で保管し、しかる後に厚さ0.5mm・幅50mmの帝人(株)製ポリカーボネート板「パンライト」に、貼込圧力9,100N/m、貼込速度300cm/分で貼付した。しかる後に予め100℃、120℃、140℃、160℃に保温しておいたそれぞれの熱風乾燥機内に15分間保管、また180℃、200℃に保温しておいたそれぞれの熱風乾燥機内に2分間保管し、熱風乾燥機より試料を取り出した後、23℃雰囲気下で24時間保管後、表面保護フィルムを剥離し表面保護フィルムのヘイズを測定した。 (1) Haze The surface protective film is stored for 3 days or more after creation in a room temperature of 23 ° C. and in a humidity of 50 RH%, and then a polycarbonate plate “Panlite” manufactured by Teijin Limited having a thickness of 0.5 mm and a width of 50 mm. It was pasted at a pasting pressure of 9,100 N / m and a pasting speed of 300 cm / min. Thereafter, it is stored for 15 minutes in each of the hot air dryers that have been kept at 100 ° C., 120 ° C., 140 ° C., and 160 ° C., and for 2 minutes in each of the hot air dryers that are kept at 180 ° C. and 200 ° C. After storing and taking out a sample from a hot air dryer, after storing for 24 hours at 23 degreeC atmosphere, the surface protection film was peeled off and the haze of the surface protection film was measured.
表面保護フィルムを、作成後3日以上、室温23℃、湿度50RH%雰囲気下で保管し、しかる後に小坂研究所製サーフコーダ-「ET4000A」を用い、中心線平均粗さ(Ra)および十点平均粗さ(Rz)を測定した。 (2) Roughness of the back layer The surface protective film was stored for 3 days or more after creation in a room temperature of 23 ° C. and a humidity of 50 RH%, and then the center line average roughness was measured using a surf coder “ET4000A” manufactured by Kosaka Laboratory. The thickness (Ra) and the ten-point average roughness (Rz) were measured.
表面保護フィルムを、作成後3日以上、室温23℃、湿度50RH%雰囲気下で保管し、しかる後に表面保護フィルムの背面層表面と粘着層表面を重ね、摩擦係数を測定した。 (3) Friction coefficient The surface protective film was stored for 3 days or more after preparation in a room temperature of 23 ° C. and a humidity of 50 RH%, and then the back layer surface and the adhesive layer surface of the surface protective film were overlapped to measure the friction coefficient. .
密度が0.924g/cm3、190℃下でのMFR(Melt Flow Rate)が4.5g/10分である高圧法低密度ポリエチレン87重量%と、該低密度ポリエチレン88重量%に平均粒子径11μmのシリカ6重量%、ポリフルオロ炭化水素基およびポリオキシエチレン基を有する含フッ素化合物6重量%からなる混合組成物のマスターバッチ13重量%からなる組成物を背面層とし、密度が0.924g/cm3、190℃下でのMFRが7.5g/10分である高圧法低密度ポリエチレンを中間層とし、密度0.922g/cm3、融点121℃であるエチレン・ヘキセン共重合体の直鎖状低密度ポリエチレンを粘着層としてTダイ型複合製膜機を用い、背面層厚さ比率が8%、中間層厚さが72%、粘着層厚さ比率が20%、総厚さが40μmとなるよう共押出し表面保護フィルムを作成した。 <Example 1>
87% by weight of high-pressure low-density polyethylene having a density of 0.924 g / cm 3 and MFR (Melt Flow Rate) at 190 ° C. of 4.5 g / 10 minutes, and an average particle diameter of 88% by weight of the low-density polyethylene A composition comprising 13% by weight of a master batch of a mixed composition comprising 6% by weight of 11 μm silica and 6% by weight of a fluorine-containing compound having a polyfluorohydrocarbon group and a polyoxyethylene group is used as the back layer, and the density is 0.924 g. / cm 3, MFR under 190 ° C. is a high-pressure low-density polyethylene is 7.5 g / 10 min and an intermediate layer, density 0.922 g / cm 3, linear ethylene-hexene copolymer having a melting point of 121 ° C. Using a T-die type composite film forming machine with a chain low density polyethylene as the adhesive layer, the back layer thickness ratio is 8%, the intermediate layer thickness is 72%, the adhesive layer thickness ratio is 20%, and the total thickness is 4 A coextruded surface protective film was prepared to have a thickness of 0 μm.
背面層として密度0.900g/cm3、融点148℃のプロピレン・エチレン・ブテンランダム共重合体(EPBC)87重量%と、前記EPBC88重量%に平均粒子径11μmのシリカ6重量%、実施例1と同様のポリフルオロ炭化水素基及びポリオキシエチレン基を有する含フッ素化合物6重量%からなる混合組成物のマスターバッチ13重量%を用いた以外は実施例1と同様とし、表面保護フィルムを作成した。 <Example 2>
As a back layer, a propylene / ethylene / butene random copolymer (EPBC) having a density of 0.900 g / cm 3 and a melting point of 148 ° C., 87% by weight, 88% by weight of EPBC and 6% by weight of silica having an average particle diameter of 11 μm, Example 1 A surface protective film was prepared in the same manner as in Example 1 except that 13% by weight of a master batch of a mixed composition comprising 6% by weight of a fluorine-containing compound having the same polyfluorohydrocarbon group and polyoxyethylene group was used. .
粘着層として密度が0.920g/cm3である直鎖状低密度ポリエチレン87重量%に、粘着付与剤であるテルペン樹脂3重量%、および密度が0.924g/cm3の高圧法低密度ポリエチレン10重量%とからなる粘着層形成用樹脂組成物を用い、中間層として密度0.930g/cm3の直鎖状低密度ポリエチレンとした以外は実施例1と同様とし、表面保護フィルムを作成した。 <Example 3>
The density is linear low density polyethylene 87 wt% which is 0.920 g / cm 3 as an adhesive layer, terpene resin 3 wt% is a tackifier, and high-pressure low density polyethylene having a density of 0.924 g / cm 3 A surface protective film was prepared in the same manner as in Example 1 except that an adhesive layer-forming resin composition consisting of 10% by weight was used and a linear low density polyethylene having a density of 0.930 g / cm 3 was used as the intermediate layer. .
中間層として密度0.930g/cm3の直鎖状低密度ポリエチレンとした以外は実施例2と同様とし、表面保護フィルムを作成した。 <Example 4>
A surface protective film was prepared in the same manner as in Example 2 except that a linear low density polyethylene having a density of 0.930 g / cm 3 was used as the intermediate layer.
密度が0.900g/cm3である低密度ポリエチレン87重量%と、該低密度ポリエチレン88重量%とポリフルオロ炭化水素基及びポリオキシエチレン基を有する含フッ素化合物6重量%および粒径10μmのシリカ6重量%をからなるマスターバッチ13重量%からなる組成物を背面層とし、密度が0.880g/cm3である直鎖状低密度ポリエチレンを中間層とし、密度が0.922g/cm3である直鎖状低密度ポリエチレンを粘着層としてTダイ型複合製膜機を用い、背面層厚さ比率が8%、中間層厚さが72%、粘着層厚さ比率が20%、総厚さが40μmとなるよう共押出し表面保護フィルムを作成した。 <Example 5>
Silica having 87% by weight of low density polyethylene having a density of 0.900 g / cm 3 , 88% by weight of the low density polyethylene, 6% by weight of a fluorine-containing compound having polyfluorohydrocarbon groups and polyoxyethylene groups, and a particle size of 10 μm a composition comprising the masterbatch 13% by weight consisting of 6 wt% and the back layer, the linear low density polyethylene density is 0.880 g / cm 3 as an intermediate layer, density of 0.922 g / cm 3 A linear low density polyethylene is used as an adhesive layer and a T-die type composite film forming machine is used. The back layer thickness ratio is 8%, the intermediate layer thickness is 72%, the adhesive layer thickness ratio is 20%, and the total thickness. A co-extruded surface protective film was prepared so as to be 40 μm.
密度が0.930g/cm3である高圧法低密度ポリエチレン87重量%と、実施例5と同様のポリフルオロ炭化水素基およびポリオキシエチレン基を有する含フッ素化合物を6重量%および粒径10μmのシリカ7%を含有するマスターバッチ(ベース樹脂は前記高圧法低密度ポリエチレン)13重量%からなる組成物を背面層とし、密度が0.930g/cm3である直鎖状低密度ポリエチレンを中間層とし、密度が0.922g/cm3の直鎖状低密度ポリエチレン90重量%とテルペン系粘着付与剤20重量%のマスターバッチ(ベース樹脂は上記直鎖状低密度ポリエチレン)10重量%からなる組成物を粘着層としてTダイ型複合製膜機を用い、背面層厚さ比率が8%、中間層厚さが72%、粘着層厚さ比率が20%、総厚さが40μmとなるよう共押出し表面保護フィルムを作成した。 <Example 6>
87% by weight of high-pressure low-density polyethylene having a density of 0.930 g / cm 3 , 6% by weight of a fluorine-containing compound having a polyfluorohydrocarbon group and a polyoxyethylene group as in Example 5, and a particle size of 10 μm A composition comprising 13% by weight of a masterbatch containing 7% silica (the base resin is the high-pressure low-density polyethylene) is used as a back layer, and a linear low-density polyethylene having a density of 0.930 g / cm 3 is used as an intermediate layer. And a composition comprising 90% by weight of a linear low density polyethylene having a density of 0.922 g / cm 3 and 10% by weight of a masterbatch of 20% by weight of a terpene tackifier (the base resin is the above linear low density polyethylene). Using a T-die type composite film forming machine with an adhesive layer as the adhesive layer, the back layer thickness ratio is 8%, the intermediate layer thickness is 72%, the adhesive layer thickness ratio is 20%, and the total thickness is So as to be 0μm created a coextruded surface protective film.
密度が0.900g/cm3、融点145℃であるEPBC87重量%と、実施例2と同様のポリフルオロ炭化水素基及びポリオキシエチレン基を有する含フッ素化合物を6重量%および粒径10μmのシリカ7%を含有するマスターバッチ13重量%からなる組成物を背面層とし、密度が0.880g/cm3である直鎖状低密度ポリエチレンを中間層とし、密度が0.922g/cm3の直鎖状低密度ポリエチレンを粘着層としてTダイ型複合製膜機を用い、背面層厚さ比率が8%、中間層厚さが72%、粘着層厚さ比率が20%、総厚さが40μmとなるよう共押出し表面保護フィルムを作成した。 <Example 7>
Silica having a density of 0.900 g / cm 3 and a melting point of 145 ° C. of 87% by weight of EPBC, a fluorine-containing compound having the same polyfluorohydrocarbon group and polyoxyethylene group as in Example 2, and a particle size of 10 μm a composition comprising the masterbatch 13% by weight, containing 7% and the back layer, the linear low density polyethylene density is 0.880 g / cm 3 as an intermediate layer, density of 0.922 g / cm 3 straight Using a T-die type composite film forming machine with a chain low density polyethylene as the adhesive layer, the back layer thickness ratio is 8%, the intermediate layer thickness is 72%, the adhesive layer thickness ratio is 20%, and the total thickness is 40 μm. A coextruded surface protective film was prepared so that
密度が0.930g/cm3である高圧法低密度ポリエチレン87重量%と、実施例1と同様のポリフルオロ炭化水素基及びポリオキシエチレン基を同時に有する含フッ素化合物を6重量%および粒径10μmのシリカ7%を含有するマスターバッチ(ベース樹脂は前記高圧法低密度ポリエチレン)13重量%からなる組成物を背面層とし、密度が0.880g/cm3である直鎖状低密度ポリエチレンの中間層を設け、密度0.910g/cm3の直鎖状低密度ポリエチレン90重量%及びスチレン・エチレン・ブチレン・スチレン共重合体(SEBSと略記する。)が10重量%からなる組成物を粘着層としてTダイ型複合製膜機を用い、背面層厚さ比率が8%、中間層厚さ比率が72%、粘着層厚さ比率が20%、総厚さが40μmとなるよう共押出し表面保護フィルムを作成した。 <Example 8>
87% by weight of a high-pressure low-density polyethylene having a density of 0.930 g / cm 3 , 6% by weight of a fluorine-containing compound having the same polyfluorohydrocarbon group and polyoxyethylene group as in Example 1, and a particle size of 10 μm The intermediate layer of a linear low density polyethylene having a density of 0.880 g / cm 3 with a composition comprising 13% by weight of a master batch containing 7% of silica (the base resin is the high pressure method low density polyethylene). A pressure-sensitive adhesive layer comprising a composition comprising 90% by weight of a linear low density polyethylene having a density of 0.910 g / cm 3 and 10% by weight of a styrene / ethylene / butylene / styrene copolymer (abbreviated as SEBS). Using a T-die type composite film forming machine, the back layer thickness ratio is 8%, the intermediate layer thickness ratio is 72%, the adhesive layer thickness ratio is 20%, and the total thickness is 40 μm. A coextruded surface protective film was prepared.
密度が0.924g/cm3である高圧法低密度ポリエチレン94重量%と、実施例1と同様のポリフルオロ炭化水素基及びポリオキシエチレン基を同時に有する含フッ素化合物を6重量%および粒径11μmのシリカ6%を含有するマスターバッチ(ベース樹脂は前記高圧法低密度ポリエチレン)6重量%からなる組成物を背面層とする以外は実施例1と同様とし、表面保護フィルムを作成した。 <Example 9>
94% by weight of high-pressure low-density polyethylene having a density of 0.924 g / cm 3 , 6% by weight of a fluorine-containing compound having the same polyfluorohydrocarbon group and polyoxyethylene group as in Example 1, and a particle size of 11 μm A surface protective film was prepared in the same manner as in Example 1 except that a composition comprising 6% by weight of a master batch containing 6% of silica (the base resin was the above-described high-pressure low-density polyethylene) was used as the back layer.
密度が0.964g/cm3である高密度ポリエチレンを背面層とし、密度が0.924g/cm3である高圧法低密度ポリエチレンを中間層とし、密度0.922g/cm3の直鎖状低密度ポリエチレンを粘着層としてTダイ型複合製膜機を用い、背面層厚さ比率が8%、中間層厚さが72%、粘着層厚さ比率が20%、総厚さが40μmとなるよう共押出し表面保護フィルムを作成した。 <Comparative Example 1>
Density is the back layer of high density polyethylene is 0.964 g / cm 3, density of the high-pressure low-density polyethylene is 0.924 g / cm 3 as an intermediate layer, linear density 0.922 g / cm 3 Low Using a T-die type composite film forming machine with density polyethylene as the adhesive layer, the back layer thickness ratio is 8%, the intermediate layer thickness is 72%, the adhesive layer thickness ratio is 20%, and the total thickness is 40 μm. A coextruded surface protective film was prepared.
背面層の組成物を、密度0.900g/cm3のゴム成分としてエチレン・プロピレン共重合体を15重量%含有するプロピレン・エチレンブロックコポリマー(B-PPと略称)とした以外は比較例1と同様とし、表面保護フィルムを作成した。 <Comparative example 2>
Comparative Example 1 except that the composition of the back layer was a propylene / ethylene block copolymer (abbreviated as B-PP) containing 15% by weight of an ethylene / propylene copolymer as a rubber component having a density of 0.900 g / cm 3. Similarly, a surface protective film was prepared.
密度が0.951g/cm3である高密度ポリエチレンを背面層および中間層とし、酢酸ビニル濃度が10重量%であるエチレン・酢酸ビニル共重合体を粘着層としてTダイ型複合製膜機を用い、背面層厚さ比率が8%、中間層厚さが72%、粘着層厚さ比率が20%、総厚さが40μmとなるよう共押出し表面保護フィルムを作成した。 <Comparative Example 3>
Using a T-die type composite film forming machine with a high-density polyethylene having a density of 0.951 g / cm 3 as a back layer and an intermediate layer and an ethylene / vinyl acetate copolymer having a vinyl acetate concentration of 10% by weight as an adhesive layer A co-extruded surface protective film was prepared so that the back layer thickness ratio was 8%, the intermediate layer thickness was 72%, the adhesive layer thickness ratio was 20%, and the total thickness was 40 μm.
密度が0.919g/cm3である高圧法低密度ポリエチレン67重量%と、密度が0.956g/cm3である高密度ポリエチレン17重量%、密度が0.921g/cm3である直鎖状低密度ポリエチレン15.5重量%、粒径3μのシリカ0.5%重量%からなる組成物を背面層及び中間層とし、密度0.922g/cm3の直鎖状低密度ポリエチレンを粘着層としてTダイ型複合製膜機を用い、背面層厚さ比率が8%、中間層厚さが72%、粘着層厚さ比率が20%、総厚さが40μmとなるよう共押出し表面保護フィルムを作成した。 <Comparative example 4>
A high-pressure low-density polyethylene 67 wt% density of 0.919 g / cm 3, high density polyethylene 17 wt% density of 0.956 g / cm 3, linear density is at 0.921 g / cm 3 A composition comprising 15.5% by weight of low-density polyethylene and 0.5% by weight of silica having a particle size of 3 μ is used as a back layer and an intermediate layer, and a linear low-density polyethylene having a density of 0.922 g / cm 3 is used as an adhesive layer. Using a T-die type composite film forming machine, coextruded surface protective film so that the back layer thickness ratio is 8%, the intermediate layer thickness is 72%, the adhesive layer thickness ratio is 20%, and the total thickness is 40 μm. Created.
密度が0.870g/cm3である直鎖状低密度ポリエチレン87重量%と、実施例1と同様のポリフルオロ炭化水素基及びポリオキシエチレン基を同時に有する含フッ素化合物を6重量%および粒径10μmのシリカ7%を含有するマスターバッチ(ベース樹脂は前記直鎖状低密度ポリエチレン)13重量%からなる組成物を背面層とし、密度が0.900g/cm3、ゴム成分としてエチレン・プロピレン共重合体を20重量%含有するプロピレン・エチレンブロックコポリマーを中間層とし、密度0.922g/cm3の直鎖状低密度ポリエチレンを粘着層としてTダイ型複合製膜機を用い、背面層厚さ比率が8%、中間層厚さが72%、粘着層厚さ比率が20%、総厚さが40μmとなるよう共押出し表面保護フィルムを作成した。 <Comparative Example 5>
87% by weight of linear low-density polyethylene having a density of 0.870 g / cm 3 , 6% by weight of a fluorine-containing compound having the same polyfluorohydrocarbon group and polyoxyethylene group as in Example 1, and a particle size A composition consisting of 13% by weight of a master batch containing 7% of 10 μm silica (the base resin is the above-mentioned linear low density polyethylene) is used as the back layer, the density is 0.900 g / cm 3 , and ethylene / propylene is used as the rubber component. Using a T-die type composite film forming machine with a propylene / ethylene block copolymer containing 20% by weight of a polymer as an intermediate layer and a linear low density polyethylene with a density of 0.922 g / cm 3 as an adhesive layer, A co-extruded surface protective film was prepared so that the ratio was 8%, the intermediate layer thickness was 72%, the adhesive layer thickness ratio was 20%, and the total thickness was 40 μm.
Claims (10)
- 粘着層、中間層および背面層からなる表面保護フィルムであって、背面層はフッ素系離型剤を0.3重量%~10重量%含有したポリオレフィン樹脂組成物からなり、中間層を構成する樹脂は低密度ポリエチレンを主体としてなり、160℃で1分以上加熱し徐冷した後のヘイズが10%以下であり、200℃で1分以上加熱し徐冷した後のヘイズが5%以下であることを特徴とする表面保護フィルム。 A surface protective film comprising an adhesive layer, an intermediate layer and a back layer, the back layer comprising a polyolefin resin composition containing 0.3 to 10% by weight of a fluorine-based mold release agent, and constituting the intermediate layer Is mainly composed of low density polyethylene, has a haze of 10% or less after heating at 160 ° C. for 1 minute or longer and gradually cooling, and a haze after heating at 200 ° C. for 1 minute or longer and 5% or less. A surface protective film characterized by that.
- 前記背面層の中心線表面粗さ(Ra)が0.15μm以下である、請求項1に記載の表面保護フィルム。 The surface protective film according to claim 1, wherein a center line surface roughness (Ra) of the back layer is 0.15 μm or less.
- 前記背面層に粒径が5μm以上の無機粒子が添加されてなる、請求項1または2に記載の表面保護フィルム。 The surface protective film according to claim 1, wherein inorganic particles having a particle size of 5 μm or more are added to the back layer.
- 前記背面層のポリオレフィン樹脂が、0.90~0.93g/cm3の密度を有する高圧法低密度ポリエチレンである、請求項1~3のいずれかに記載の表面保護フィルム。 The surface protective film according to any one of claims 1 to 3, wherein the polyolefin resin of the back layer is high-pressure low-density polyethylene having a density of 0.90 to 0.93 g / cm 3 .
- 前記背面層のポリオレフィン樹脂が、ポリプロピレン系ランダム共重合体である、請求項1~3のいずれかに記載の表面保護フィルム。 4. The surface protective film according to claim 1, wherein the polyolefin resin of the back layer is a polypropylene random copolymer.
- 前記中間層を構成する低密度ポリエチレンが、0.90~0.93g/cm3の密度を有する高圧法低密度ポリエチレンまたは0.88~0.93g/cm3の密度を有する直鎖状低密度ポリエチレンである、請求項1~5のいずれかに記載の表面保護フィルム。 The low density polyethylene constituting the intermediate layer is a high pressure method low density polyethylene having a density of 0.90 to 0.93 g / cm 3 or a linear low density having a density of 0.88 to 0.93 g / cm 3. The surface protective film according to any one of claims 1 to 5, which is polyethylene.
- 前記粘着層を構成する樹脂が、エチレン・酢酸ビニル共重合体または直鎖状低密度ポリエチレンである、請求項1~6のいずれかに記載の表面保護フィルム。 The surface protective film according to any one of claims 1 to 6, wherein the resin constituting the adhesive layer is an ethylene / vinyl acetate copolymer or linear low-density polyethylene.
- 前記フッ素系離型剤が、ポリフルオロ炭化水素基およびポリオキシエチレン基を有する含フッ素化合物である、請求項1~7のいずれかに記載の表面保護フィルム。 The surface protective film according to any one of claims 1 to 7, wherein the fluorine-based mold release agent is a fluorine-containing compound having a polyfluorohydrocarbon group and a polyoxyethylene group.
- 請求項1~8のいずれかに記載の表面保護フィルムがポリカーボネートまたはポリメタクリル酸メチルからなる樹脂板の片面に貼合され、その反対面に印刷層およびアクリルニトリル・ブタジエン・スチレン共重合体またはポリカーボネートが積層された構造体。 The surface protective film according to any one of claims 1 to 8 is bonded to one side of a resin plate made of polycarbonate or polymethyl methacrylate, and a printed layer and an acrylonitrile / butadiene / styrene copolymer or polycarbonate are opposite to the other side. A structure with stacked layers.
- 請求項9に記載の構造体を表面保護フィルムが貼合された面をおもて面として加熱成型して得られる成型体。 A molded body obtained by heat-molding the structure according to claim 9 with the surface on which the surface protective film is bonded as a front surface.
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010242079A (en) * | 2009-03-18 | 2010-10-28 | Sekisui Chem Co Ltd | Surface protective film |
WO2011122288A1 (en) * | 2010-03-31 | 2011-10-06 | 東レフィルム加工株式会社 | Surface protection film |
JP2012011735A (en) * | 2010-07-05 | 2012-01-19 | Toray Advanced Film Co Ltd | Surface protective film |
WO2015129426A1 (en) * | 2014-02-28 | 2015-09-03 | 東レフィルム加工株式会社 | Surface protection film for heating process |
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JP2000273203A (en) * | 1999-03-29 | 2000-10-03 | Nippon Polyolefin Kk | Polyethylene film |
JP2005028619A (en) * | 2003-07-08 | 2005-02-03 | Ci Sanplus Kk | Surface protective film |
US8765874B2 (en) * | 2008-01-28 | 2014-07-01 | Exxonmobil Chemical Patents Inc. | Ethylene based polymers and articles made therefrom |
JP2010280749A (en) * | 2009-06-02 | 2010-12-16 | Dainippon Printing Co Ltd | Adhesive film |
CN103865421A (en) * | 2010-03-31 | 2014-06-18 | 东丽薄膜先端加工股份有限公司 | Surface protection film |
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JP2010242079A (en) * | 2009-03-18 | 2010-10-28 | Sekisui Chem Co Ltd | Surface protective film |
WO2011122288A1 (en) * | 2010-03-31 | 2011-10-06 | 東レフィルム加工株式会社 | Surface protection film |
JP2012011735A (en) * | 2010-07-05 | 2012-01-19 | Toray Advanced Film Co Ltd | Surface protective film |
WO2015129426A1 (en) * | 2014-02-28 | 2015-09-03 | 東レフィルム加工株式会社 | Surface protection film for heating process |
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