WO2013065578A1 - ポリオレフィン系フィルム - Google Patents

ポリオレフィン系フィルム Download PDF

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Publication number
WO2013065578A1
WO2013065578A1 PCT/JP2012/077619 JP2012077619W WO2013065578A1 WO 2013065578 A1 WO2013065578 A1 WO 2013065578A1 JP 2012077619 W JP2012077619 W JP 2012077619W WO 2013065578 A1 WO2013065578 A1 WO 2013065578A1
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Prior art keywords
resin
film
styrene
layer
release layer
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PCT/JP2012/077619
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English (en)
French (fr)
Japanese (ja)
Inventor
茂知 山本
大木　祐和
多賀　敦
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東洋紡株式会社
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=48191927&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2013065578(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 東洋紡株式会社 filed Critical 東洋紡株式会社
Priority to KR1020147011151A priority Critical patent/KR101978535B1/ko
Priority to CN201280052752.1A priority patent/CN103906818B/zh
Publication of WO2013065578A1 publication Critical patent/WO2013065578A1/ja

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • 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
    • 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
    • C09J125/00—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 aromatic carbocyclic ring; Adhesives based on derivatives of such polymers
    • C09J125/02—Homopolymers or copolymers of hydrocarbons
    • C09J125/04—Homopolymers or copolymers of styrene
    • 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
    • C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—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
    • 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
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2405/00—Adhesive articles, e.g. adhesive tapes
    • 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
    • C09J2423/006—Presence of polyolefin in the substrate
    • 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
    • C09J2423/106—Presence of homo or copolymers of propene in the substrate

Definitions

  • the present invention relates to a polyolefin film.
  • the polyolefin film of the present invention is a member such as a prism sheet used for optical applications, a synthetic resin plate (for example, for building materials), a stainless plate (for example, for building materials), an aluminum plate, a decorative plywood, a steel plate, It can be used for glass plates, home appliances, precision machines, etc.
  • the polyolefin-based film protects the surface of the automobile body during production, protects the product from being scratched when stacked, stored, transported, or transported in the manufacturing process, and the product. Can be suitably used for protecting from scratches during secondary processing (for example, bending or pressing).
  • the above-mentioned coverings have been diversified, and not only those with a smooth coating surface but also many surface irregularities can be seen.
  • Examples of the covering having surface irregularities include a prism type lens portion of a prism sheet used for an optical member.
  • the adhesive layer has a high adhesive force so that the adhesive force can be obtained even if the contact area is small. Can be considered.
  • the problem to be solved by the present invention is that the adhesive film is stored in a roll state while showing strong adhesive strength to the covering and can be used for various coverings. It is an object of the present invention to provide a self-adhesive surface protective film which is less prone to problems such as partial elongation or deformation and has excellent processability of the film. That is, an object of the present invention is to provide a polyolefin-based film having good releasability and film-forming properties without causing surface roughness transfer and without suppressing adhesiveness.
  • the resin constituting the adhesive layer is a styrene elastomer (provided that a block copolymer of a styrene polymer block and an olefin polymer block, a random copolymer of a styrene polymer block, styrene and an olefin).
  • a block copolymer with a polymer block and / or a hydrogenated product thereof) and a polyolefin resin and the blending amount of the polyolefin resin is 5% in the resin component constituting the adhesive layer % To 25% by weight, and the resin constituting the release layer contains at least a polypropylene resin and an ⁇ -olefin (co) polymer having 4 or more carbon atoms, and an ⁇ -olefin (co) heavy having 4 or more carbon atoms.
  • a piece of a base material layer made of a polypropylene resin in which the blending amount is 5% by weight or more and less than 25% by weight in the resin component constituting the release layer The present invention relates to a polyolefin-based film comprising a pressure-sensitive adhesive layer on the surface and a release layer on the opposite surface laminated by coextrusion.
  • the ⁇ -olefin copolymer having 4 or more carbon atoms is preferably a 4-methylpentene-1 (co) polymer.
  • the surface roughness (SRa) of the release layer is preferably 0.20 ⁇ m or more and 0.50 ⁇ m or less.
  • the MFR (230 ° C., 2.16 Kgf) of the polypropylene resin used for the base material layer and the release layer is 1.0 to 15 g / 10 min.
  • the MFR (230 ° C., 2.16 Kgf) of the styrene elastomer used for the adhesive layer is preferably 0.5 to 20 g / 10 min.
  • the polyolefin-based film according to the present invention exhibits a strong adhesive force to the covering and can be used for various coverings, but when the adhesive film is stored in a roll state and then the film is fed out, the film is partially It has the advantage that the film is not easily stretched or deformed, and is excellent in processability of the film. That is, according to the present invention, it is possible to provide a polyolefin-based film having good releasability and film-forming properties without causing surface roughness transfer and without suppressing adhesiveness.
  • FIG. 1 is a schematic diagram of a measurement sample.
  • the polyolefin-based film of the present invention requires a base material layer mainly composed of a polypropylene-based resin.
  • the polypropylene-based resin used here include crystalline polypropylene, random copolymerization of propylene and a small amount of ⁇ -olefin, block More specifically, the crystalline polypropylene resin contains n-heptane-insoluble isotactic propylene homopolymer or propylene in an amount of 60% by weight or more, which is used in ordinary extrusion molding.
  • the base material layer preferably contains 50% by weight or more of propylene units, more preferably 60% by weight or more. If the propylene content is less than 50% by weight, the film may have a low feeling and may be difficult to handle.
  • the insolubility of n-heptane is indicative of the crystallinity of polypropylene and at the same time indicates safety.
  • n-heptane insolubility (at 25 ° C., 60 ° C. according to Ministry of Health and Welfare Notification No. 20 in February 1982). It is a preferred embodiment to use one that is compatible with an elution amount of 150 ppm or less (30 ppm or less when the operating temperature exceeds 100 ° C.)).
  • the ⁇ -olefin copolymerization component of the copolymer of propylene and other ⁇ -olefins includes ⁇ -olefins having 2 to 8 carbon atoms such as ethylene, 1-butene, 1-pentene, 1-hexene, 4 C4 or higher ⁇ -olefins such as -methyl-1-pentene are preferred.
  • the copolymer is preferably a random or block copolymer obtained by polymerizing one or more of the ⁇ -olefins exemplified above with propylene.
  • the melt flow rate (MFR: 230 ° C., 2.16 Kgf) of the polypropylene resin used is preferably in the range of 1.0 to 15 g / 10 minutes, more preferably in the range of 2.0 to 10.0 g / 10 minutes. Further, two or more kinds of copolymers of propylene and other ⁇ -olefins can be mixed and used. Furthermore, the waste film produced when the film obtained in the present invention is processed into a product can be re-granulated as a recovered raw material and added to the base material layer. By using the recovered raw material, the production cost can be reduced.
  • the pressure-sensitive adhesive layer in the present invention requires a styrene-based elastomer and a polyolefin-based resin, and it is necessary to use a styrene-based elastomer in order to develop a high adhesive force. Further, considering the adhesive strength and the roll-out property of the film from the roll state, it contains 5% by weight or more and 25% by weight or less of polyolefin resin. By adding the polyolefin-based resin, it is possible to reduce the peeling force from the pressure-sensitive adhesive side to the release surface. Further, a tackifier resin and a softener can be mixed as needed for controlling the adhesive strength.
  • Styrenic elastomers are ABA type block polymers such as styrene-butadiene-styrene, styrene-isoprene-styrene, styrene-ethylene / butylene copolymer-styrene, styrene-ethylene / propylene copolymer-styrene, styrene -Butadiene block, styrene-isoprene, styrene-ethylene / butylene copolymer, AB block polymer such as styrene-ethylene / propylene copolymer, styrene random copolymer such as styrene-butadiene rubber, and hydrogenation thereof You can list things.
  • the melt flow rate (MFR: 230 ° C., 2.16 Kgf) of the styrene elastomer used is preferably in the range of 0.5 to 20 g / 10 minutes, more preferably in the range of 2.0 to 10.0 g / 10 minutes.
  • the range of 3 to 10 g / 10 min is more preferable, and the range of 4 to 7 g / 10 min is particularly preferable.
  • the amount of the styrenic elastomer in the adhesive layer is preferably 45% by weight or more, more preferably 50% by weight or more, still more preferably 60% by weight or more, particularly preferably 70% by weight or more, preferably 99% by weight or less, more preferably. Is 98% by weight or less, more preferably 97% by weight or less, particularly preferably 96% by weight or less, and most preferably 95% by weight or less.
  • the styrene component in the styrene-based elastomer is desirably 5% by weight or more and 30% by weight or less. If it is less than 5% by weight, granulation at the time of producing the resin becomes difficult, and if it exceeds 25% by weight, the adhesive strength is lowered and it becomes difficult to obtain the required adhesive strength.
  • the styrene component in the styrene elastomer is preferably 10% by weight or more and 20% by weight or less, more preferably 10% by weight or more and 15% by weight or less.
  • the component other than the styrene component in the styrene elastomer is preferably composed of components such as ethylene and butylene, and the amount of the component other than the styrene component is preferably 70 to 95% by weight, more preferably in the styrene elastomer. Is 75 to 90% by weight, more preferably 80 to 90% by weight, still more preferably 85 to 90% by weight.
  • the polyolefin-based resin is not particularly limited, and is a crystalline polypropylene, a copolymer of propylene and a small amount of ⁇ -olefin, a low density polyethylene, a high density polyethylene, a copolymer of ethylene and a small amount of ⁇ -olefin, an ethylene and a non-olefin.
  • a copolymer with a saturated carboxylic acid or an unsaturated carboxylic acid ester, polystyrene and the like can be mentioned.
  • the base material layer is composed of a polypropylene resin
  • a polypropylene resin can be suitably used from the viewpoint of melt viscosity and the like.
  • the melt flow rate (MFR: 230 ° C., 2.16 Kgf) of the polyolefin resin used is preferably in the range of 1.0 to 100.0 g / 10 minutes, more preferably in the range of 2.0 to 30.0 g / 10 minutes.
  • the range of 2 to 10 g / 10 min is more preferable, and the range of 2 to 7 g / 10 min is particularly preferable.
  • the blending amount of the polyolefin-based resin in the adhesive layer (the resin component constituting the adhesive layer) is in the range of 5% by weight or more and 25% by weight or less.
  • the blending amount of the polyolefin resin exceeds 25% by weight, the adhesive strength is lowered depending on the resin used, and sufficient adhesive strength cannot be obtained.
  • the blending amount of the polyolefin resin is less than 5% by weight, it does not contribute to the adhesive force change of the adhesive layer. Moreover, it does not contribute to the peeling force with respect to the release layer of the film adhesive layer.
  • the blending amount of the polyolefin resin is preferably 6% by weight or more and 18% by weight or less, more preferably 6% by weight or more and 15% by weight or less.
  • the weight ratio of the styrene elastomer to the polyolefin resin in the adhesive layer is preferably 75/25 to 95/5, more preferably 82/18 to 94/6, and still more preferably 85. / 15 to 94/6.
  • the tackifying resin include aliphatic hydrocarbon resins, aromatic hydrocarbon resins, alicyclic hydrocarbon resins, terpene resins, coumarone / indene resins, styrene resins, rosin resins, and the like. Hydrocarbon resins (eg petroleum resins) are preferred.
  • the molecular weight of the tackifying resin is not particularly limited and can be set appropriately.However, if the molecular weight is small, there is a risk of causing material transfer from the adhesive layer to the adherend or heavy peeling, while the molecular weight is large. Therefore, the number average molecular weight of the tackifying resin is preferably about 1,000 to 100,000, since the effect of improving the adhesive force tends to be poor.
  • the amount of tackifying resin in the adhesive layer is preferably in the range of 5 wt% or more and 30 wt% or less.
  • the blending amount of the tackifying resin exceeds 30% by weight, the melt viscosity becomes extremely low due to the low molecular weight of the tackifying resin, and the main component is a polypropylene resin when performing coextrusion film formation using a T-die or the like. Lamination with the base material layer may be difficult. Moreover, there exists a possibility that it may not contribute to the adhesive force change of an adhesion layer as the compounding quantity of tackifying resin in an adhesion layer is less than 5 weight%.
  • the amount of the tackifying resin is more preferably 6% by weight or more and 25% by weight or less, still more preferably 6% by weight or more and 20% by weight or less, still more preferably 6% by weight or more and 15% by weight or less, particularly Preferably they are 6 weight% or more and 10 weight% or less.
  • the softening agent examples include low molecular weight diene polymers, polyisobutylene, hydrogenated polyisoprene, hydrogenated polybutadiene and derivatives thereof, and polybutene.
  • the molecular weight of the softening agent is not particularly limited and can be set appropriately, but if the molecular weight is small, there is a risk of causing material transfer from the adhesive layer to the adherend or heavy peeling, while the molecular weight is large.
  • the number average molecular weight of the softening agent is preferably about 1,000 to 100,000 because the effect of improving the adhesive force tends to be poor.
  • the tackifying resin and softening agent used in the adhesive layer are liquids or powders depending on the type, and there are things that contaminate the extruder during extrusion. Since such a problem is improved by using a tackifier resin or softener as a masterbatch with a polyolefin resin, it is preferable to use a tackifier resin or softener as a masterbatch with a polyolefin resin.
  • the weight ratio (styrene elastomer / tackifier resin / polyolefin resin) of the styrene elastomer, tackifier resin and polyolefin resin in the adhesive layer is preferably 45/25/30 to 90/5/5, more preferably 60/20/20 to 90/5/5, more preferably 70/15/15 to 90/5/5.
  • the adhesive strength of the polyolefin-based film of the present invention is preferably in the range of 200 to 900 cN / 25 mm with respect to the acrylic plate at 23 ° C. in consideration of use in various coatings.
  • the adhesive strength can be appropriately set by changing the resin composition, thickness, etc. of the adhesive layer.
  • the adhesive force is more preferably 300 cN / 25 mm or more and 900 cN / 25 mm or less, and still more preferably 400 cN / 25 mm or more and 800 cN / 25 mm or less.
  • the polyolefin film of the present invention may contain known additives as necessary.
  • a lubricant, an antiblocking agent, a heat stabilizer, an antioxidant, an antistatic agent, a light resistance agent, an impact resistance improvement agent and the like may be contained.
  • the low molecular weight substance on the surface of the adhesive layer is preferably less than 1 mg / m 2 .
  • the measurement of the low molecular weight substance on the surface of the adhesive layer was carried out by the following procedure. After the surface of the adhesive layer is washed with an organic solvent that does not erode the resin constituting the adhesive layer such as ethanol, the organic solvent is removed from the cleaning solution with an evaporator, and the residue obtained by weighing the residue is washed.
  • the polyolefin-based film of the present invention forms a release layer on the surface opposite to the adhesive layer laminated on one side of the base material layer, so that even if the adhesive films are stacked, there is little blocking between the adhesive films.
  • the adhesive film is stored in a roll state and then the film is fed out, problems such as partial elongation or deformation of the film hardly occur, and the processability of the film is excellent.
  • it is effective to form surface irregularities on the release layer to reduce the contact area with the adhesive layer.
  • an ⁇ -olefin (co) polymer having 4 or more carbon atoms such as a 4-methylpentene-1 (co) polymer can be preferably used.
  • Other examples include low-density polyethylene, high-density polyethylene, a copolymer of ethylene and a small amount of ⁇ -olefin, a copolymer of ethylene and vinyl acetate, polystyrene, a polyester-based resin, and a polyamide-based resin.
  • 4-methylpentene-1 (co) polymer not only roughens the surface like a mat, but also improves the peelability by lowering the surface free energy of the film surface.
  • the release layer includes an ⁇ -olefin (co) polymer having 4 or more carbon atoms and a polypropylene resin (for example, propylene-ethylene block copolymer or homopolypropylene), an ⁇ -olefin having 4 or more carbon atoms ( Examples thereof include a combination of a (co) polymer, a polypropylene resin (for example, propylene-ethylene block copolymer or homopolypropylene) and low-density polyethylene.
  • a polypropylene resin for example, propylene-ethylene block copolymer or homopolypropylene
  • the blending amount of the ⁇ -olefin (co) polymer having 4 or more carbon atoms in the release layer is in the range of 5 wt% to 25 wt%.
  • the release layer is extruded on one side of the base material layer made of polypropylene resin by using a T die or the like.
  • the film forming property of the release layer is deteriorated.
  • the blending amount of the ⁇ -olefin (co) polymer having 4 or more carbon atoms is less than 5% by weight, it does not contribute to the improvement of the release force of the release layer.
  • the blending amount of the ⁇ -olefin (co) polymer having 4 or more carbon atoms is preferably 7% by weight or more and 24% by weight or less.
  • the molecular weight of the ⁇ -olefin (co) polymer having 4 or more carbon atoms may cause a substance transfer from the release layer to the adhesive layer if the molecular weight is small.
  • the molecular weight is preferably about 10,000 to 1,000,000.
  • the weight ratio of the polypropylene resin and the ⁇ -olefin (co) polymer having 4 or more carbon atoms in the release layer is preferably 95/5. To 75/25, more preferably 93/7 to 76/24.
  • the blending amount of the low density polyethylene is preferably 10 to 40% by weight, more preferably 15 to 35% by weight, in 100% by weight of the resin component constituting the release layer. It is.
  • the average surface roughness SRa of the release layer surface is preferably 0.20 ⁇ m or more and 0.50 ⁇ m or less. By doing so, blocking resistance and the protection performance of a to-be-adhered body can be improved.
  • the surface roughness of the release layer is lower than 0.20 ⁇ m, the feeding property of the film is deteriorated when the film is in a roll form.
  • the surface roughness of the release layer is higher than 0.50 ⁇ m, the surface irregularities of the release layer may be transferred to the surface of the adhesive layer, and the adhesive force may be significantly reduced.
  • the surface unevenness of the release layer is more preferably a surface having an average surface roughness SRa of 0.25 ⁇ m or more and 0.45 ⁇ m or less.
  • the peeling force of the pressure-sensitive adhesive surface of the polyolefin-based film of the present invention with respect to the release surface is preferably in the range of 200 cN / 25 mm or less at 23 ° C. from the viewpoint of the film payout property when the pressure-sensitive adhesive film is in roll form.
  • the peeling force can be appropriately set by changing the addition amount and surface roughness of the ⁇ -olefin copolymer having 4 or more carbon atoms in the release layer.
  • the lower limit of the peeling force with respect to the release surface of the pressure-sensitive adhesive surface of the pressure-sensitive adhesive film is about 1 cN / 25 mm, more preferably about 5 cN / 25 mm as a practical value.
  • the thickness of the adhesive layer of the polyolefin film in the present invention is preferably 1 ⁇ m or more and less than 30 ⁇ m.
  • the thickness of the adhesive layer is preferably 2 ⁇ m or more and 20 ⁇ m or less, more preferably 3 ⁇ m or more and 15 ⁇ m or less, and particularly preferably 4 ⁇ m or more and 8 ⁇ m or less.
  • the thickness of the base material layer of the polyolefin film of the present invention is preferably 5 ⁇ m or more and less than 100 ⁇ m, more preferably 10 ⁇ m or more and less than 75 ⁇ m, and further preferably 15 ⁇ m or more and less than 40 ⁇ m.
  • the thickness of the base material layer is less than 5 ⁇ m, there is a problem that the waist feeling is weak, wrinkles etc. are easily formed when pasted to a covering as a protective film, and sufficient adhesive strength cannot be obtained. If it is above, the film is disadvantageous in terms of cost.
  • the thickness of the release layer of the polyolefin film of the present invention is preferably 1 ⁇ m or more and less than 30 ⁇ m.
  • the thickness of the release layer is preferably 2 ⁇ m or more and 20 ⁇ m or less, more preferably 3 ⁇ m or more and 15 ⁇ m or less, and particularly preferably 4 ⁇ m or more and 8 ⁇ m or less.
  • the polyolefin film of the present invention is composed of a base material layer, an adhesive layer, and a release layer containing the above resin component, and each layer may be one layer or two or more layers as long as the effect of the present invention is exhibited. Good.
  • the resin constituting each layer may be sent to a feed block type T-die while being in a molten state using, for example, a single-screw or twin-screw extruder, and laminated and extruded to form a polyolefin film having at least three layers.
  • the temperature of the extruder of each layer may be appropriately adjusted in consideration of the molding temperature of the components used in each layer in order to bring each layer into a molten state.
  • each layer may be adjusted in the range of 200 ° C. to 260 ° C. Also good.
  • the temperature of the T die may be the same as the above temperature.
  • the take-up speed from the T die to the casting roll may be such that each layer has a suitable thickness, for example, 10 m / min to 50 m / min, preferably 10 m / min to 30 m / min.
  • the polyolefin film of the present invention is preferably in the form of a roll in terms of handling.
  • the upper limit of the width and the winding length of the film roll is not particularly limited, but from the viewpoint of ease of handling, the width is generally 1.5 m or less, and the winding length is preferably 6000 m or less when the film thickness is 30 ⁇ m.
  • a winding core a plastic core and metal cores, such as 3 inches, 6 inches, and 8 inches, can usually be used.
  • the adhesive film of the present invention is a member such as a prism sheet used for optical applications, a synthetic resin plate (for example, for building materials), a stainless steel plate (for example, for building materials), an aluminum plate, a decorative plywood, a steel plate, and glass. It can be used for boards, home appliances, precision machines, etc.
  • the polyolefin film of the present invention protects the surface of the automobile body during production, protects against damage when stacking, storing, transporting, and transporting articles in the manufacturing process, and It can be used to protect an article from scratches during secondary processing (for example, bending or pressing).
  • the present invention will be further described with reference to examples.
  • the present invention is not limited to the following examples without departing from the gist thereof.
  • the evaluation method of the physical property in a following example and a comparative example is as follows.
  • 180 degree peeling means holding the peeling angle between the acrylic plate and the film at the time of measuring the resistance value at the time of peeling at 180 degrees.
  • a schematic diagram of the measurement sample is shown in FIG. The measurement was performed three times for one sample, and the average value was defined as the adhesive strength of the sample.
  • a test piece of 150 mm in the winding direction at the time of film production and 25 mm in a direction perpendicular thereto is cut out, and the release surface of the test piece attached to the adhesive surface and the acrylic plate with a double-sided adhesive tape is used.
  • a release surface using a rubber roll having a mass of 2000 g (with a spring hardness of 80 Hs on the roller surface and a width of 45 mm and a diameter (including the rubber layer) of 95 mm covered with a rubber layer having a thickness of 6 mm).
  • the test piece was reciprocated once at a speed of 5 mm / second and pressed.
  • Example 1 Preparation of base material layer 100 wt% of a homopolypropylene resin (manufactured by Sumitomo Chemical Co., Ltd .: FLX80E4, MFR: 7.5 g / 10 min) was melt-extruded at 240 ° C. with a 120 mm ⁇ single-screw extruder to obtain a base material layer.
  • a homopolypropylene resin manufactured by Sumitomo Chemical Co., Ltd .: FLX80E4, MFR: 7.5 g / 10 min
  • Styrene elastomer manufactured by Asahi Kasei Chemicals: Tuftec (registered trademark) H1221, styrene copolymerization ratio 12 wt%, MFR: 4.5 g / 10 min
  • homopolypropylene resin Suditomo Chemical: FS2011DG3, MFR: 2.5 g / 10 minutes
  • 7.5 wt% of petroleum resin manufactured by Arakawa Chemical Industry: Alcon (registered trademark) P125
  • 7.5 wt% was melt extruded at 220 ° C. with a 90 mm ⁇ single screw extruder to form an adhesive layer.
  • the extruded film is drawn onto a casting roll at a temperature of 30 ° C. at a rate of 20 m / min, solidified by cooling, and a three-layer three-layer unstretched film having a substrate layer thickness of 28 ⁇ m, an adhesive layer thickness of 6 ⁇ m, and a release layer thickness of 6 ⁇ m.
  • Example 2 The adhesive layer and the base material layer were the same as in Example 1, but the release layer was changed to the following content, and a three-kind three-layer unstretched film was obtained by the same production method as in Example 1.
  • release layer Propylene-ethylene block copolymer (manufactured by Nippon Polypropylene: BC3HF) 56 wt%, low-density polyethylene resin (Ube Industries: R300) 20 wt%, and polymethylpentene (Mitsui Chemicals: RT31) 24 wt% in a 90 mm ⁇ single screw extruder 250 It was melt extruded at 0 ° C. to obtain a release layer.
  • Example 3 With the base material layer remaining in Example 1, the adhesive layer and the release layer were changed to the following contents, and an unstretched film of 3 types and 3 layers was obtained by the same production method as Example 1.
  • Styrene elastomer (Asahi Kasei Chemicals: Tuftec (registered trademark) H1221, styrene copolymerization ratio 12 wt%, MFR: 4.5 g / 10 min), petroleum resin (Arakawa Chemical Industries: Alcon (registered trademark) P125) and homopolypropylene A resin (Sumitomo Chemical: FS2011DG3, MFR: 2.5 g / 10 min) mixed at a ratio of 80 / 7.5 / 12.5 wt% was melt extruded at 220 ° C.
  • Example 4 With the base material layer remaining in Example 1, the adhesive layer and the release layer were changed to the following contents, and an unstretched film of 3 types and 3 layers was obtained by the same production method as Example 1.
  • Styrene elastomer (Asahi Kasei Chemicals: Tuftec (registered trademark) H1221, styrene copolymerization ratio 12 wt%, MFR: 4.5 g / 10 min) and homopolypropylene resin (Sumitomo Chemical: FS2011DG3, MFR: 2.5 g / 10 min)
  • FS2011DG3 homopolypropylene resin
  • Example 5 With the base material layer remaining in Example 1, the adhesive layer and the release layer were changed to the following contents, and an unstretched film of 3 types and 3 layers was obtained by the same production method as Example 1.
  • Styrene elastomer (Asahi Kasei Chemicals: Tuftec (registered trademark) H1221, styrene copolymerization ratio 12 wt%, MFR: 4.5 g / 10 min) and homopolypropylene resin (Sumitomo Chemical: FS2011DG3, MFR: 2.5 g / 10 min)
  • FS2011DG3 homopolypropylene resin
  • Example 6 With the base material layer remaining in Example 1, the adhesive layer and the release layer were changed to the following contents, and an unstretched film of 3 types and 3 layers was obtained by the same production method as Example 1.
  • Styrene elastomer (Asahi Kasei Chemicals: Tuftec (registered trademark) H1221, styrene copolymerization ratio 12 wt%, MFR: 4.5 g / 10 min) and homopolypropylene resin (Sumitomo Chemical: FS2011DG3, MFR: 2.5 g / 10 min)
  • Tuftec registered trademark
  • H1221 styrene copolymerization ratio 12 wt%
  • MFR 4.5 g / 10 min
  • homopolypropylene resin (Sumitomo Chemical: FS2011DG3, MFR: 2.5 g / 10 min)
  • Example 1 The base material layer and the adhesive layer were the same as in Example 1, but the release layer was changed to the following content, and a three-kind three-layer unstretched film was obtained by the same production method as in Example 1. (Production of release layer) 100% by weight of propylene-ethylene block copolymer (manufactured by Nippon Polypropylene: BC4FC) was melt extruded at 250 ° C. with a 90 mm ⁇ single-screw extruder to obtain a release layer.
  • propylene-ethylene block copolymer manufactured by Nippon Polypropylene: BC4FC
  • Example 2 The base material layer and the adhesive layer were the same as in Example 1, but the release layer was changed to the following content, and a three-kind three-layer unstretched film was obtained by the same production method as in Example 1.
  • Homopolypropylene resin (Sumitomo Chemical: FLX80E4, MFR: 7.5 g / 10 min) 66 wt%, low density polyethylene resin (Ube Industries: R300) 30 wt%, polymethylpentene (Mitsui Chemicals: RT31) 4 wt% 90 mm ⁇ It was melt-extruded at 250 ° C. with a single screw extruder to form a release layer.
  • Example 3 Although the base material layer and the adhesive layer were the same as in Example 1, the release layer was changed to the following content, and an attempt was made to obtain an unstretched film of 3 types and 3 layers by the same production method as in Example 1. However, a film that could withstand the evaluation could not be obtained.
  • Homopolypropylene resin (Sumitomo Chemical: FLX80E4, MFR: 7.5 g / 10 min) 50 wt% and polymethylpentene (Mitsui Chemicals: RT31) 50 wt% were melt-extruded at 250 ° C in a 90 mm ⁇ single-screw extruder and released. A mold layer was used.
  • Example 4 With the base material layer remaining in Example 1, the adhesive layer and the release layer were changed to the following contents, and an unstretched film of 3 types and 3 layers was obtained by the same production method as Example 1.
  • 100 wt% of a styrene elastomer manufactured by Asahi Kasei Chemicals: Tuftec (registered trademark) H1221, styrene copolymerization ratio 12 wt%, MFR: 4.5 g / 10 min
  • Tuftec registered trademark
  • MFR 4.5 g / 10 min
  • the films obtained in Examples 1 to 6 had practically sufficient adhesive strength when used as a protective film, and when the film was fed out as a roll without transfer of surface roughness.
  • the peelability of the film was also good, and the film forming property was also good.
  • the films obtained in Comparative Examples 1 and 2 and 4 were not necessarily good in peelability when the film was fed out as a roll.
  • the film-forming property was poor and a film that could withstand the evaluation could not be obtained.
  • all the films obtained in the comparative examples were inferior in quality and low in practicality.
  • the polyolefin film of the present invention is used for synthetic resin plates (for example, for building materials), stainless steel plates (for example, for building materials), aluminum plates, decorative plywood, steel plates, glass plates, home appliances, precision machines, etc. Can do.
  • the polyolefin-based film of the present invention protects the surface of the automobile body during production, protects against scratches when stacking, storing, transporting, and transporting articles in the manufacturing process, and It can also be suitably used to protect the article from scratches during secondary processing (for example, bending or pressing), and greatly contributes to the industry.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Laminated Bodies (AREA)
  • Adhesive Tapes (AREA)
PCT/JP2012/077619 2011-10-31 2012-10-25 ポリオレフィン系フィルム WO2013065578A1 (ja)

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JP7287863B2 (ja) * 2018-08-09 2023-06-06 東レフィルム加工株式会社 積層フィルム
CN110872474A (zh) * 2018-08-31 2020-03-10 翊圣企业股份有限公司 切割片胶膜用基膜及其制作方法
CN113613890B (zh) 2019-03-29 2023-10-24 东丽薄膜先端加工股份有限公司 层叠膜
CN113727852A (zh) * 2019-04-17 2021-11-30 日东电工株式会社 多层共挤出膜和包括该多层共挤出膜的制品
CN112126364A (zh) * 2020-09-21 2020-12-25 广东东立新材料科技股份有限公司 一种粘结层组合物、自粘膜及其应用

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