WO2014054701A1 - Film de protection de surface auto-adhésif - Google Patents

Film de protection de surface auto-adhésif Download PDF

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Publication number
WO2014054701A1
WO2014054701A1 PCT/JP2013/076839 JP2013076839W WO2014054701A1 WO 2014054701 A1 WO2014054701 A1 WO 2014054701A1 JP 2013076839 W JP2013076839 W JP 2013076839W WO 2014054701 A1 WO2014054701 A1 WO 2014054701A1
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WIPO (PCT)
Prior art keywords
film
mass
adhesive
layer
resin
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PCT/JP2013/076839
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English (en)
Japanese (ja)
Inventor
茂知 山本
大木　祐和
松田　明
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東洋紡株式会社
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Priority to JP2014539791A priority Critical patent/JPWO2014054701A1/ja
Publication of WO2014054701A1 publication Critical patent/WO2014054701A1/fr

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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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
    • C08L53/025—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes modified
    • 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
    • C09J123/08—Copolymers of ethene
    • C09J123/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C09J123/0815—Copolymers of ethene with aliphatic 1-olefins
    • 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
    • C09J153/02—Vinyl aromatic monomers and conjugated dienes
    • C09J153/025—Vinyl aromatic monomers and conjugated dienes modified
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/241—Polyolefin, e.g.rubber
    • C09J7/243—Ethylene or propylene polymers
    • 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
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
    • 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
    • C09J2423/04—Presence of homo or copolymers of ethene
    • 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
    • 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
    • C09J2453/00—Presence of block copolymer

Definitions

  • the present invention relates to a self-adhesive surface protective film (adhesive film).
  • 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 plate (for example, for building materials), an aluminum plate, a decorative plywood, a steel plate, and a glass plate.
  • Home appliances, precision machinery, to protect the surface of automobile bodies during manufacturing, to protect articles from being scratched when stacked, stored, transported, transported in the manufacturing process, and articles Can be suitably used for protecting from scratches during secondary processing (for example, bending or pressing).
  • the above-described coverings have been diversified, and not only those having a smooth covering surface but also many having surface irregularities.
  • 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 shows a strong adhesive force to the covering, and can be used for various coverings, while storing the adhesive film in a roll state, and then paying out the film,
  • the present invention comprises a base material layer made of a polypropylene resin having a pressure-sensitive adhesive layer on one side and a release layer on the other side by co-extrusion, and has a maximum adhesive strength to an acrylic plate of 800 cN / 25 mm or more.
  • the present invention relates to a self-adhesive surface protective film characterized by having a delivery sound of less than 90 dB when a film roll having a width of 550 mm and a winding length of 1000 m is fed out at a speed of 20 m / min for 300 m.
  • the adhesive film has a strong adhesive force to the covering and can be used for various coverings.
  • the self-adhesive surface protective film can be obtained which is difficult to cause problems such as stretching or deforming, and that the working environment is hardly deteriorated because the payout sound does not become too large, and that the workability of the film is excellent.
  • the resin constituting the adhesive layer includes at least a styrene elastomer and a polyethylene resin, and the content of the styrene elastomer in the adhesive layer is 35% by mass to 99% by mass, and the polyethylene resin is contained.
  • the amount is preferably 1% by mass or more and 65% by mass or less, and the sum of the ethylene component and the polyethylene resin in the styrene elastomer is preferably 35% by mass or more and less than 70% by mass in the adhesive layer component.
  • the MFR (190 ° C., 2.16 kgf) of the polyethylene resin in the adhesive layer is preferably 0.5 to 8 g / 10 min.
  • the MFR (230 ° C., 2.16 kgf) of the styrene elastomer in the adhesive layer is preferably 0.5 to 8 g / 10 min.
  • the MFR (230 ° C., 2.16 kgf) of the polypropylene resin in the base material layer is 1.0 to 15 g / 10 min.
  • the resin used for the release layer is preferably a non-silicone resin.
  • the pressure-sensitive adhesive film according to the present invention exhibits a strong adhesive force to the covering, and can be used for various coverings.
  • the film is partially In particular, there is an advantage that problems such as stretching and deformation are unlikely to occur, the feeding sound does not become too large, the working environment is unlikely to deteriorate, and the film processing suitability is excellent.
  • an adhesive layer is laminated on one side of a base material layer made of a polypropylene resin, and a release layer is laminated on the opposite side by coextrusion, and the maximum adhesive force to an acrylic plate is 800 cN / 25 mm or more, and the film width Is a self-adhesive surface protective film (adhesive film) characterized in that a delivery sound when a film roll having a roll length of 550 mm and a winding length of 1000 m is fed out by 300 m at a speed of 20 m / min is less than 90 dB.
  • a self-adhesive surface protective film as characterized in that a delivery sound when a film roll having a roll length of 550 mm and a winding length of 1000 m is fed out by 300 m at a speed of 20 m / min is less than 90 dB.
  • the adhesive strength of the pressure-sensitive adhesive film of the present invention is preferably in the range of 800 to 1200 cN / 25 mm with respect to the acrylic plate at 23 ° C. in view of use in various coatings.
  • the acrylic board used for this evaluation uses what contains methacrylic resin 88 mass% or more.
  • the adhesive strength is less than 800 cN / 25 mm, turning may occur when protecting depending on the covering, and the function as a protective film may not be carried.
  • the adhesive strength exceeds 1200 cN / 25 mm, there is a possibility that the film cannot be smoothly peeled when the film is peeled from the covering.
  • the adhesive strength with respect to the prism sheet is in a range of 2 to 20 cN / 25 mm at 23 ° C. in consideration of the use.
  • the adhesive strength is less than 2 cN / 25 mm, turning or the like occurs when protecting, and the function as a protective film cannot be carried.
  • the adhesive strength exceeds 20 cN / 25 mm, there is a possibility that the film cannot be smoothly peeled when the film is peeled off.
  • the adhesive force can be appropriately set by changing the resin composition, thickness, etc. of the adhesive layer.
  • the feeding sound of the pressure-sensitive adhesive film of the present invention is preferably less than 90 dB when a film roll having a film width of 550 mm and a winding length of 1000 m is fed at a speed of 20 m / min and less than 90 dB, considering the working environment. If the delivery sound is 90 dB or more, it is not preferable because it is necessary to wear a soundproofing protector. More preferably, it is 88 dB or less, More preferably, it is 85 dB or less. On the other hand, although the delivery sound has never been small, since it is a film having an adhesive layer that adheres strongly to the acrylic plate, a practical value of about 70 dB is the lower limit of the delivery sound.
  • the pressure-sensitive adhesive film of the present invention requires a base material layer mainly composed of a polypropylene resin.
  • the polypropylene resin used here include crystalline polypropylene, random copolymers of propylene and a small amount of ⁇ -olefin, and blocks. More specifically, as a crystalline polypropylene resin, it contains n-heptane-insoluble isotactic propylene homopolymer or propylene in an amount of 60% by mass or more, which is used in ordinary extrusion molding.
  • the base material layer preferably contains 60% by mass or more of propylene units, more preferably 70% by mass or more.
  • the propylene unit is less than 60% by mass, the film loses its sensation and may be difficult to handle.
  • the propylene unit amount is less than 60% by mass or a polyethylene resin is used, the film becomes flexible and easily stretched, and the film partially stretches or deforms when the film is fed out. Is more likely to occur.
  • n-heptane insolubility 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.
  • 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, and 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.
  • Adhesive layer As the resin constituting the adhesive layer of the present invention, it is preferable to use a styrene-based elastomer in order to develop a high adhesive force. Moreover, in order to express the adhesiveness and the roll-out property of the film from the roll state, it is preferable to add a polyethylene resin. Furthermore, by adding a polyethylene-based resin, it is possible to reduce the peeling force from the pressure-sensitive adhesive side to the release surface while maintaining the pressure-sensitive adhesive force with the covering. For controlling the adhesive strength, polyolefin resins other than polyethylene resins, tackifier resins, softeners, polystyrene, and the like can be mixed as necessary.
  • Styrenic elastomers are ABA type block polymers such as styrene-butadiene-styrene, AB type block polymers such as styrene-butadiene copolymers, and random co-polymerization of styrene polymer blocks with styrene and butadiene.
  • examples thereof include a hydrogenated product such as a block copolymer with a combined block, and a hydrogenated product of a styrene random copolymer such as styrene-butadiene rubber.
  • the polyethylene resin examples include low density polyethylene and a copolymer of ethylene and ⁇ -olefin.
  • low-density polyethylene especially linear low-density polyethylene called LLDPE
  • ultra-low-density polyethylene called VLDPE reduce the peel strength of the film from the roll state while maintaining the adhesive strength. It is further preferable to improve the feeding property.
  • LLDPE linear low-density polyethylene
  • VLDPE ultra-low-density polyethylene
  • the ⁇ -olefin is not particularly limited, and examples thereof include 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, and 1-octene.
  • the amount of the styrenic elastomer in the adhesive layer is preferably 35% by mass or more and 99% by mass or less in order to reduce the expression of high adhesive force and the peel strength of the film from the roll state and to express the feeding property. It is. If it is less than 35% by mass, the adhesive strength is lowered and it is difficult to obtain the required adhesive strength.
  • the amount of styrene-based elastomer in the adhesive layer is preferably in the range of 40% by mass to 90% by mass.
  • the amount of the polyethylene-based resin in the adhesive layer is preferably 1% by mass or more and 65% by mass or less in order to reduce the expression of high adhesive force and the peeling force of the film from the roll state and to express the feeding property. It is. When the amount of the polyethylene resin in the adhesive layer exceeds 65% by mass, the adhesive strength is lowered, and it becomes difficult to obtain the required adhesive strength.
  • the amount of the polyethylene resin in the adhesive layer is preferably in the range of 3% by mass to 60% by mass.
  • the sum of the ethylene component and the polyethylene resin in the styrene elastomer is in the range of 35% by mass or more and less than 70% by mass in the adhesive layer component.
  • the adhesive strength is lowered and sufficient adhesive strength cannot be obtained.
  • the sum of the ethylene component and the polyethylene-based resin is less than 35% by mass in the adhesive layer component, the peeling force of the film adhesive layer on the release layer is increased.
  • the sum of the ethylene component and the polyethylene resin is 40% by mass or more and 65% by mass or less in the adhesive layer component. More preferably, the sum of the ethylene component and the polyethylene resin is preferably 45% by mass or more and 63% by mass or less in the adhesive layer component.
  • the melt flow rate (MFR: 230 ° C., 2.16 kgf) of the styrene elastomer to be used is preferably in the range of 0.5 to 8 g / 10 minutes, and 2.0 to 7.0 g / 10 minutes in terms of film forming properties. The range of is more preferable.
  • the melt flow rate (MFR: 190 ° C., 2.16 kgf) of the polyethylene resin used is preferably in the range of 0.5 to 8 g / 10 minutes, more preferably in the range of 0.8 to 7.0 g / 10 minutes. By making it the said range, it becomes easy to perform the film-forming which made the thickness of each layer uniform.
  • the styrene component in the styrene-based elastomer is desirably 5% by mass or more and 40% by mass or less. If it is less than 5% by mass, granulation at the time of producing a resin (pellet) becomes difficult, and if it exceeds 40% by mass, the adhesive strength is lowered and it becomes difficult to obtain the required adhesive strength.
  • the styrene component in the styrene elastomer is more preferably in the range of 10% by mass to 30% by mass.
  • the ethylene component in the styrenic elastomer is easily mixed with the polyethylene resin when the polyethylene resin is added. It seems to be easy to grow.
  • the ethylene component in the styrene-based elastomer is desirably 15% by mass or more and 70% by mass or less. Moreover, since it is thought that the ethylene component in a styrene-type elastomer has contributed greatly to adhesive force expression, when it exceeds 70 mass%, when a polyethylene-type resin is added on the following conditions, it will become difficult to reduce adhesive force. There is a tendency.
  • the ethylene component in a polyethylene-type resin is 70 mass% or more.
  • the ethylene component of the polyethylene resin is more preferably 75% by mass or more, and still more preferably 80% by mass or more.
  • 98 mass% or less is preferable, as for the ethylene component of a polyethylene-type resin, More preferably, it is 96 mass% or less, More preferably, it is 95 mass% or less.
  • the resin in which the ethylene component in the polyethylene resin is 70% by mass or more include CX3007 and VL100 manufactured by Sumitomo Chemical.
  • the component other than the ethylene component in the polyethylene resin is preferably less than 30% by mass, more preferably 25% by mass or less.
  • the density of the polyethylene resin is preferably 850 to 920 kg / m 3 , more preferably 860 to 910 kg / m 3 , and most preferably 880 to 906 kg / m 3 . By making it the said range, it becomes easy to make favorable adhesiveness and feeding property compatible.
  • the flexural modulus of the polyethylene resin is desirably 10 MPa or more and less than 90 MPa. When it is 10 MPa or more, the film feedability from the roll state is further improved, and when it is less than 90 MPa, the adhesive strength is further improved.
  • the flexural modulus of the polyethylene resin is more preferably in the range of 15 to 80 MPa, still more preferably in the range of 20 to 70 MPa.
  • the polyolefin resin other than the polyethylene resin is not particularly limited, and examples thereof include crystalline polypropylene, a copolymer of propylene and a small amount of ⁇ -olefin. Since these resins generally tend to decrease the adhesive strength only by blending in a small amount, it is preferable to blend in a proportion of 1% by mass or more and 20% by mass or less.
  • the tackifier resin examples include petroleum resins, aliphatic hydrocarbon resins, alicyclic hydrocarbon resins, aromatic hydrocarbon resins, terpene resins, coumarone / indene resins, styrene resins, rosin resins, and the like.
  • the molecular weight of the tackifying resin is not particularly limited and can be set as appropriate.However, if the molecular weight is small, there is a risk of causing material transfer from the adhesive layer to the coated body or heavy peeling, while the molecular weight is large.
  • the number-average molecular weight of the tackifying resin is preferably about 1,000 to 100,000 because it tends to be poor in the effect of improving the adhesive force. The number average molecular weight can be measured by gel permeation chromatography or the like.
  • the amount of tackifying resin in the adhesive layer is preferably in the range of 3% by weight to 20% by weight with respect to 100% by weight of the adhesive layer component. If the compounding amount of the tackifying resin is 20% by mass or more, the melt viscosity becomes extremely low because the molecular weight of the tackifying resin is low, and the main component is a polypropylene resin when performing coextrusion film formation using a T die or the like. In addition to the difficulty of lamination with the base material layer, the adhesive layer becomes sticky, and the film feedability from the roll state tends to be difficult to improve.
  • the blending amount of the tackifying resin is more preferably 5% by mass or more and 15% by mass or less.
  • the difference in melt viscosity between the base material layer and the adhesive layer can be achieved by adding about 1% to 15% by weight of polystyrene resin. Can be improved to facilitate lamination.
  • the blending amount of the polystyrene resin is more preferably 3% by mass or more and 12% by mass or less, and further preferably 5% by mass or more and 10% by mass 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. However, if the molecular weight is small, there is a risk of causing material transfer from the adhesive layer to the coated body or heavy peeling, etc.
  • the number average molecular weight of the softening agent is preferably about 1,000 to 100,000 because it tends to be poor in the effect of improving force. The number average molecular weight can be measured by the same method as in the case of the tackifier resin.
  • 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.
  • Such problems can be improved by using a tackifier resin or softener as a masterbatch with a polyethylene resin or polyolefin resin, so that the tackifier resin or softener can be a masterbatch with a polyethylene resin or polyolefin resin. It is more preferable to use it after making it.
  • the pressure-sensitive adhesive film of the present invention can 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.
  • these components have a relatively low molecular weight, and may bleed out to the surface of the adhesive layer to reduce the adhesive strength of the adhesive layer. Therefore, when an additive is used, 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.
  • the adhesive layer surface is washed with an organic solvent that does not corrode the resin constituting the adhesive layer, such as ethanol, and after removing the organic solvent from the cleaning solution with an evaporator, the residue is weighed and the obtained numerical value is washed. It was obtained by dividing by the surface area of the layer surface.
  • an organic solvent that does not corrode the resin constituting the adhesive layer
  • the residue is weighed and the obtained numerical value is washed. It was obtained by dividing by the surface area of the layer surface.
  • the residue is present in an amount of 1 mg / m 2 or more, foreign matter is present between the surface of the adhesive layer and the surface of the coated body, which reduces the contact area and decreases the van der Waals force. Is not preferable.
  • the pressure-sensitive adhesive film of the present invention forms a release layer made of a polypropylene-based resin that is a non-silicone resin on the surface opposite to the pressure-sensitive adhesive layer laminated on one side of the base material layer. Even if it piles up, blocking between adhesive films decreases. In particular, when the adhesive film is stored in a roll state and then fed out, problems such as partial stretching or deformation of the film hardly occur, and the film has excellent processability. In order to prevent blocking of the adhesive films even when the adhesive films are stacked, it is effective to form surface irregularities on the release layer to reduce the contact area with the adhesive layer.
  • ⁇ -olefin (co) polymers having 4 or more carbon atoms such as low density polyethylene and 4-methylpentene-1 (co) polymer are preferably used.
  • Other examples include linear low density polyethylene, high density polyethylene, copolymers of ethylene and a small amount of ⁇ -olefin, copolymers of ethylene and vinyl acetate, polystyrene, polyester resins, polyamide resins, and the like. It is done.
  • 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 three-dimensional average surface roughness SRa of the release layer surface is 0.10 ⁇ m or more and 0.50 ⁇ m or less. By doing so, blocking resistance and the protection performance of a covering can be improved.
  • the surface roughness of the release layer is lower than 0.10 ⁇ m, the film feedability may be deteriorated when the film is in roll form. If 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 three-dimensional average surface roughness SRa of the release layer surface means the average roughness at the center plane when the surface roughness curve is approximated by a sine curve, and can be measured by a surface roughness measuring device or the like.
  • the thickness of the pressure-sensitive adhesive layer of the pressure-sensitive adhesive film of 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 10 ⁇ m or less.
  • the thickness of the base material layer of the pressure-sensitive adhesive film of the present invention is preferably 5 ⁇ m or more and less than 100 ⁇ m, more preferably 10 ⁇ m or more and 75 ⁇ m or less, and further preferably 15 ⁇ m or more and 55 ⁇ m or less.
  • 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 pressure-sensitive adhesive film of the present invention is preferably 1 ⁇ m or more and less than 30 ⁇ m. If the thickness of the adhesive film is less than 1 ⁇ m, stable film formation by coextrusion becomes difficult, and if it is 30 ⁇ m or more, the film is disadvantageous in terms of cost.
  • the thickness of the release layer is more preferably 2 ⁇ m or more and 20 ⁇ m or less, and further preferably 3 ⁇ m or more and 15 ⁇ m or less.
  • the thickness of the self-adhesive surface protective film of this invention is 10 micrometers or more and 150 micrometers or less, More preferably, they are 15 micrometers or more and 120 micrometers or less, More preferably, they are 20 micrometers or more and 100 micrometers or less. If the total thickness of the film is too thin, it may be inferior in handling, and if it is too thick, the rigidity becomes high and handling properties are inferior, and the film may be disadvantageous in terms of cost.
  • the self-adhesive surface protective film of the present invention is composed of a substrate layer containing the above resin component, an adhesive layer, and a release layer, and the resin constituting each layer is, for example, a single-screw or biaxial extruder. It is obtained by being fed into a feed block type or multi-manifold type T die while being in a molten state and laminated and extruded with three or more 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. For example, it 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 pressure-sensitive adhesive film of the present invention is preferably in the form of a roll in terms of handling.
  • the upper limit of the width and winding length of the film roll is not particularly limited, but in view of ease of handling, generally, the width is 1600 mm or less, and the winding length is preferably 5000 m or less when the film thickness is 40 ⁇ 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 plate (for example, for building materials), an aluminum plate, a decorative plywood, a steel plate, and a glass plate.
  • a synthetic resin plate for example, for building materials
  • a stainless plate for example, for building materials
  • an aluminum plate for example, a decorative plywood, a steel plate, and a glass plate.
  • 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 polyester sheet having a thickness of 190 ⁇ m and a size of 25 mm ⁇ 170 mm is prepared as a grip margin for the measurement sample, and the adhesive film and the acrylic plate are bonded to the end of the measurement film on which the adhesive film is bonded with a width of 15 mm. Attached with cellophane tape as a grip for measurement.
  • 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.
  • Feeding sound from roll The feeding sound when a film roll having a film width of 550 mm and a winding length of 1000 m was fed 300 m at a speed of 20 m / min was measured.
  • a sound level meter Lion Co., Ltd., NL-20 was used as the delivery sound, the microphone was pointed directly below, 100 mm directly above the film roll and film peeling point, and La value at a position 50 mm away from the end of the film roll. (A characteristic) was measured.
  • Example 1 (Preparation of base material layer) 100% by mass of a homopolypropylene resin (manufactured by Sumitomo Chemical Co., Ltd .: FLX80E4, 230 ° C. MFR: 7.5 g / 10 min) was melt-extruded at 240 ° C. with a 90 mm ⁇ single screw extruder to obtain a base material layer.
  • Styrenic elastomer (Asahi Kasei Chemicals: Tuftec (registered trademark) H1221, styrene component ratio 12% by mass, ethylene component ratio 18% by mass, 230 ° C.
  • MFR 4.5 g / 10 min
  • 40% by mass and ethylene / ⁇ -olefin copolymer weight Combined (Sumitomo Chemical: CX3007, 190 ° C. MFR: 3.7 g / 10 min, flexural modulus: 26 MPa) 50% by mass and petroleum resin (Arakawa Chemical Industries: Alcon (registered trademark) P125) 10% by mass 40 mm ⁇ uniaxial It was melt-extruded at 210 ° C. with an extruder to form an adhesive layer.
  • the substrate layer thickness is 28 ⁇ m
  • the adhesive layer thickness is 6 ⁇ m
  • the release layer thickness is 6 ⁇ m
  • the film width is 600 mm
  • the film A three-kind three-layer unstretched film having a length of 1100 m was obtained. Further, this film was slit at a rate of 50 m / min by applying a contact pressure of 50 N to the film width with a rubber roll, and this film was slit at a speed of 50 m / min, whereby an unstretched film having a film width of 550 mm and a film length of 1000 m was obtained. Obtained.
  • Example 2 The base material layer and the release layer were the same as in Example 1, but the adhesive 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.
  • Styrene elastomer (Asahi Kasei Chemicals: Tuftec (registered trademark) H1221, styrene component ratio 12% by mass, ethylene component ratio 18% by mass, 230 ° C.
  • MFR 4.5 g / 10 min
  • ethylene / ⁇ -olefin copolymer 40% by mass of coalesced (manufactured by Sumitomo Chemical Co., Ltd .: CX3007, 190 ° C.
  • MFR 3.7 g / 10 min, flexural modulus: 26 MPa) was melt extruded at 210 ° C. with a 40 mm ⁇ single screw extruder to obtain an adhesive layer.
  • Example 3 The base material layer and the release layer were the same as in Example 1, but the adhesive 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.
  • Styrenic elastomer (Asahi Kasei Chemicals: Tuftec (registered trademark) H1221, styrene component ratio 12% by mass, ethylene component ratio 18% by mass, 230 ° C. MFR: 4.5 g / 10 min) 40% by mass and ethylene / ⁇ -olefin copolymer weight Combined (Sumitomo Chemical: VL100, 190 ° C.
  • MFR 0.8 g / 10 min, flexural modulus: 64 MPa) 50% by mass and petroleum resin (Arakawa Chemical Industries: Alcon (registered trademark) P125) 10% by mass 40 mm ⁇ uniaxial It was melt-extruded at 210 ° C. with an extruder to form an adhesive layer.
  • Example 4 With the base material layer and the release layer remaining in Example 1, the adhesive layer was changed to the following content, and a three-kind three-layer unstretched film was obtained by the same production method as Example 1.
  • Styrene elastomer (Asahi Kasei Chemicals: Tuftec (registered trademark) H1041, styrene component ratio 30% by mass, ethylene component ratio 49% by mass, 230 ° C. MFR: 5.0 g / 10 min) 85% by mass and ethylene / ⁇ -olefin copolymer Combined (Sumitomo Chemical: CX3007, 190 ° C.
  • Example 5 Example 1 except that the adhesive layer was changed to the following contents while the base material layer and the release layer were the same as in Example 1, the base material layer thickness was 24 ⁇ m, the adhesive layer thickness was 10 ⁇ m, and the release layer thickness was 6 ⁇ m.
  • Three types and three layers of unstretched films were obtained by the same production method.
  • Styrenic elastomer (Asahi Kasei Chemicals: Tuftec (registered trademark) H1221, styrene component ratio 12% by mass, ethylene component ratio 18% by mass, 230 ° C.
  • MFR 4.5 g / 10 min
  • 50% by mass and ethylene / ⁇ -olefin copolymer weight Combined (Sumitomo Chemical: CX3007, 190 ° C. MFR: 3.7 g / 10 min, flexural modulus: 26 MPa) 37% by mass and petroleum resin (Arakawa Chemical Industries: Alcon (registered trademark) P125) 13% by mass 40 mm ⁇ uniaxial It was melt-extruded at 210 ° C. with an extruder to form an adhesive layer.
  • Example 6 Example 1 except that the adhesive layer was changed to the following contents while the base material layer and the release layer were the same as those in Example 1, the base material layer thickness was 30 ⁇ m, the adhesive layer thickness was 4 ⁇ m, and the release layer thickness was 6 ⁇ m. Three types and three layers of unstretched films were obtained by the same production method. (Preparation of adhesive layer) Styrenic elastomer (Asahi Kasei Chemicals: Tuftec (registered trademark) H1221, styrene component ratio 12% by mass, ethylene component ratio 18% by mass, 230 ° C.
  • Tuftec registered trademark
  • MFR 4.5 g / 10 min
  • 40% by mass and ethylene / ⁇ -olefin copolymer weight Combined (Sumitomo Chemical: CX3007, 190 ° C. MFR: 3.7 g / 10 min, flexural modulus: 26 MPa) 55% by mass and petroleum resin (Arakawa Chemical Industries: Alcon (registered trademark) P125) 5% by mass 40 mm ⁇ uniaxial It was melt-extruded at 210 ° C. with an extruder to form an adhesive layer.
  • Example 4 The base material layer and the release layer were the same as in Example 1, but the adhesive 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.
  • Styrene elastomer manufactured by Asahi Kasei Chemicals: Tuftec (registered trademark) H1221, styrene component ratio 12 mass%, ethylene component ratio 18 mass%, 230 ° C. MFR: 4.5 g / 10 min
  • 40 mass% and homopolypropylene manufactured by Sumitomo Chemical: FLX80E4, 190 ° C.
  • Example 5 The base material layer and the release layer were the same as in Example 1, but the adhesive 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.
  • Hydrogenated random copolymer of styrene and butadiene manufactured by JSR: Dynalon (registered trademark) 1320P, styrene component ratio 10 mass%, ethylene component ratio 22 mass%, 230 ° C.
  • the films obtained in Examples 1 to 6 had practically sufficient adhesive strength when used as a protective film, and the delivery sound when the film was delivered as a roll was also good. .

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Adhesive Tapes (AREA)
  • Laminated Bodies (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

L'invention concerne un film de protection de surface auto-adhésif qui présente une forte adhésion sur un corps à recouvrir, avec lequel le film adhésif est stocké à l'état enroulé, tout en étant utilisable avec divers corps à recouvrir, qui n'est pas susceptible de poser des problèmes comme un étirement ou une déformation partielle du film lorsqu'il est tiré depuis son état enroulé, qui a peu de risque d'affecter négativement l'environnement de travail car l'étirement du film ne produit pas trop de bruit, et qui présente une excellente maniabilité du film. Le film de protection de surface auto-adhésif est caractérisé de la manière suivante : il est formé en utilisant une co-extrusion pour déposer une couche adhésive sur une surface d'une couche de substrat et une couche anti-adhésif sur sa surface opposée, ladite couche de substrat comprenant une résine de polypropylène ; l'adhésion maximale sur une feuille acrylique est d'au moins 800 cN/25 mm ; et le bruit produit par l'étirement du film est inférieur à 90 db lorsque 300 m d'un rouleau de film ayant une largeur de film de 550 mm et une longueur de rouleau de 100 m sont tirés à une vitesse de 20 m/min.
PCT/JP2013/076839 2012-10-05 2013-10-02 Film de protection de surface auto-adhésif WO2014054701A1 (fr)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
JP2016074788A (ja) * 2014-10-03 2016-05-12 味の素株式会社 保護フィルム付き接着シートの製造方法
JPWO2015194059A1 (ja) * 2014-06-18 2017-04-20 東洋紡株式会社 自己粘着性表面保護フィルム

Families Citing this family (1)

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JP2023007518A (ja) * 2019-12-16 2023-01-19 凸版印刷株式会社 積層体及びこのリサイクル方法、並びに再生樹脂組成物及びこれを含む物品

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JP2012087164A (ja) * 2010-10-15 2012-05-10 Dic Corp 表面保護フィルム
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JPH08510771A (ja) * 1993-06-02 1996-11-12 ミネソタ マイニング アンド マニュファクチャリング カンパニー 新規複合構造体
JPH0925465A (ja) * 1995-07-12 1997-01-28 Toray Ind Inc 表面保護フィルム
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2015194059A1 (ja) * 2014-06-18 2017-04-20 東洋紡株式会社 自己粘着性表面保護フィルム
JP2016074788A (ja) * 2014-10-03 2016-05-12 味の素株式会社 保護フィルム付き接着シートの製造方法

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JPWO2014054701A1 (ja) 2016-08-25
TW201418132A (zh) 2014-05-16
JP6508383B2 (ja) 2019-05-08
TWI607945B (zh) 2017-12-11

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