WO2023058575A1 - Film de résine long, moleté - Google Patents

Film de résine long, moleté Download PDF

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Publication number
WO2023058575A1
WO2023058575A1 PCT/JP2022/036726 JP2022036726W WO2023058575A1 WO 2023058575 A1 WO2023058575 A1 WO 2023058575A1 JP 2022036726 W JP2022036726 W JP 2022036726W WO 2023058575 A1 WO2023058575 A1 WO 2023058575A1
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WO
WIPO (PCT)
Prior art keywords
knurl
film
height
resin film
roll
Prior art date
Application number
PCT/JP2022/036726
Other languages
English (en)
Japanese (ja)
Inventor
尭永 阿部
準二 石川
渉 中嶋
雅己 小堂
Original Assignee
東洋紡株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 東洋紡株式会社 filed Critical 東洋紡株式会社
Priority to CN202280066878.8A priority Critical patent/CN118076469A/zh
Priority to KR1020247014800A priority patent/KR20240070682A/ko
Priority to JP2023552850A priority patent/JPWO2023058575A1/ja
Publication of WO2023058575A1 publication Critical patent/WO2023058575A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/14—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web
    • B65H18/20—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web the web roll being supported on two parallel rollers at least one of which is driven
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating

Definitions

  • the present invention relates to a long film wound into a roll. More specifically, the present invention relates to a knurled long film.
  • the present invention was made against the background of such problems of the prior art.
  • the main object of the present invention is to suppress electrification at the time of unwinding up to the core of a long film wound into a roll, even if it is produced using a knurl with a shape that is relatively easy to process.
  • To provide a long film having knurls that are resistant to crushing, and furthermore, to provide a long film in which the occurrence of winding misalignment and wrinkles during storage and transportation is suppressed, and high flatness is maintained. is.
  • Section 1 A long resin film wound into a roll, The elongated resin film is knurled near both ends of the film width.
  • the knurl at the right end is referred to as the right knurl
  • the knurl at the left end is referred to as the left knurl.
  • the elongated resin film according to Item 1 wherein both the right knurl and the left knurl have a knurl height (Hnb) of the winding core of 0.5 to 4 ⁇ m.
  • Item 3. Item 3. The elongated shape according to Item 1 or 2, wherein the knurl height (Hnb) of the winding core/the knurl height (Hne) of the surface layer is 0.3 to 0.9 for both the right knurl and the left knurl. resin film. Section 4. 4. The elongated resin film according to any one of Items 1 to 3, wherein the surface layer portion has a knurl height (Hne) of 1.2 to 6 ⁇ m. Item 5.
  • Knurl height of the winding core of the right knurl Hnbr Knurl height of the winding core of the left knurl: Hnbl Knurl height of the surface layer of the right knurl: Hner Knurl height of the surface layer of the left knurl: Hnel
  • Hnel Any of items 1 to 4, wherein the absolute value of the left and right knurl height uniformity of the winding core obtained by (Hnbr - Hnbl) / [(Hnbr + Hnbl) / 2] is 0.3 or less A long resin film as described. Item 6. Item 6.
  • Item 7. Item 7. The long resin film according to any one of Items 1 to 6, wherein when the winding outer surface of the long resin film is the A surface and the winding inner surface is the B surface, at least one of the A surface and the B surface is a coating layer. .
  • a method for producing a laminated film comprising: Item 10. Item 9. The production method according to Item 9, wherein the laminated film is a polarizer protective film. Item 11. Item 9. The manufacturing method according to Item 9, wherein the laminated film is for thin film layer transfer.
  • the long film wound into a roll of the present invention the occurrence of winding misalignment and wrinkles during storage and transportation is suppressed, and the film surface is free from scratches and has excellent flatness.
  • the charge amount when unwound is small, the coating film is less repelled when coated, and the end of the long film A coating film with excellent thickness accuracy can be provided.
  • the film is preferably a long film wound into a roll.
  • the film is preferably a resin film, and the resin is preferably at least one selected from polyester, polycycloolefin, triacetylcellulose, acrylic, polycarbonate, polyamide, polyimide, and polypropylene. Polyester, polycycloolefin, and triacetyl cellulose are more preferred, and polyester is even more preferred. In the case of polyester, it is preferably at least one selected from polyethylene terephthalate and polyethylene naphthalate.
  • the film may be an unstretched film or a stretched film (uniaxially stretched or biaxially stretched film).
  • a stretched film is preferred, and a stretched polyester film is particularly preferred.
  • the lower limit of the film width is preferably 500 mm, more preferably 800 mm, even more preferably 1000 mm, particularly preferably 1200 mm.
  • the upper limit of the film width is preferably 4000 mm, more preferably 3500 mm, even more preferably 3000 mm, particularly preferably 2700 mm, most preferably 2500 mm.
  • the lower limit of the film length is preferably 1000m, more preferably 1500m, still more preferably 2000m.
  • the upper limit of the film length is preferably 20,000 m, more preferably 15,000 m, still more preferably 10,000 m, and particularly preferably 7,000 m.
  • the lower limit of the film thickness is preferably 25 ⁇ m, more preferably 30 ⁇ m, still more preferably 35 ⁇ m, particularly preferably 40 ⁇ m, most preferably 45 ⁇ m.
  • the upper limit of the film thickness is preferably 200 ⁇ m, more preferably 150 ⁇ m, still more preferably 100 ⁇ m, particularly preferably 90 ⁇ m, most preferably 80 ⁇ m. Handling is facilitated by adjusting the thickness to be less than or equal to the above.
  • the composition of the A side and the B side may be the same or different. If the compositions of the A side and the B side are different, the charge tends to increase when the film is unwound.
  • the present invention is preferably applied to such films in which the A-side and B-side compositions are different.
  • the case where the A side and the B side have different compositions is, for example, when different raw material resins are laminated by co-extrusion, when a coat layer is provided only on one side of the A side or B side, and when the A side and the B side have different compositions.
  • the present invention is preferably applied to both surfaces of which coating layers having different compositions are provided.
  • the layers forming the A side and the B side have different resin compositions.
  • Coating layer Preferred examples of the coat layer include an easy adhesion layer, an easy slip layer, a smoothing layer, a hard coat layer, an orientation control layer, and the like.
  • the coat layer may be provided in-line during film formation, or may be provided off-line after film formation.
  • the resin used for the coating layer include polyester, acrylic, polyurethane (polyester polyurethane, polycarbonate polyurethane, polyether polyurethane, etc.), ethylene vinyl acetate copolymer, polyamide, styrene acrylic copolymer, polyvinyl alcohol, and the like.
  • the coat layer may be a layer composed of a photocurable resin such as a hard coat layer.
  • the photocurable resin may be a monomer or oligomer of a double bond-containing compound.
  • the resin used in the coating layer contains a cross-linking agent.
  • cross-linking agents include isocyanates, amino resins such as melamine, oxazoline compounds, and epoxy resins.
  • monomers or oligomers of compounds containing multiple double bonds such as trimethylolpropane triacrylate, pentaerythritol tetraacrylate, acrylic-modified polyurethane, and acrylic-modified epoxy resin may be used.
  • the coating layer may contain particles, surfactants, leveling agents, antistatic agents, catalysts, etc. as additives.
  • the lower limit of the coat thickness is preferably 0.001 ⁇ m, more preferably 0.005 ⁇ m, still more preferably 0.01 ⁇ m, and particularly preferably 0.02 ⁇ m.
  • the upper limit of the coat thickness is preferably 10 ⁇ m, more preferably 5 ⁇ m, still more preferably 3 ⁇ m, particularly preferably 2 ⁇ m, and most preferably 1 ⁇ m.
  • the upper limit of the arithmetic mean roughness (Sa) of at least one surface of the film is preferably 15 nm, more preferably 10 nm, still more preferably 5 nm, particularly preferably 4 nm, most preferably 3 nm. .
  • the lower limit of Sa on at least one surface of the film is preferably 0.2 nm, more preferably 0.4 nm, still more preferably 0.5 nm.
  • the upper limit of the root-mean-square roughness (Sq) of at least one surface of the film is preferably 30 nm, more preferably 20 nm, still more preferably 15 nm, particularly preferably 10 nm, and most preferably 7 nm. be.
  • the lower limit of Sq on at least one side of the film is preferably 0.3 nm, more preferably 0.5 nm, still more preferably 0.7 nm. Sa and Sq on both sides of the film are more preferably within the above range. By setting the Sa and Sq of the film within the above ranges, even if the knurls are somewhat crushed at the roll core during storage or transportation, an excessive rise in peel electrification is suppressed and uniform slipping property is achieved. By giving it, it is possible to reduce the abnormality of the roll shape. Moreover, when used as an optical film or release film, high transparency can be ensured, and when coated on a film, defects can be prevented from occurring in the coating film.
  • Sa and Sq were measured using a non-contact surface profile measurement system (VertScan R550H-M100 manufactured by Ryoka Systems Co., Ltd.) according to ISO 25178, as described in the Examples.
  • Both ends of the film are preferably knurled and then wound into a roll.
  • the method of knurling is not particularly limited, and includes a method of deforming the film by pressing it against a knurl, a method of irradiating a laser beam to create a bulge around the hole, a method such as an inkjet method, and an ultraviolet curable resin or hot melt.
  • a method of providing resin dots can be used. By these methods, dot-like projections can be provided on the film surface.
  • Knurling is preferably provided on both ends in the width direction of the film.
  • the lower limit of the distance between the edge of the film and the knurl position is preferably 0.5 mm, more preferably 1 mm.
  • the upper limit of the distance between the edge of the film and the knurl position is preferably 20 mm, more preferably 15 mm, and still more preferably 10 mm.
  • the lower limit of the width of the knurled portion is preferably 3 mm, more preferably 5 mm, and even more preferably 7 mm. By making it more than the above, it is possible to make the knurl difficult to crush.
  • the upper limit of the knurl width is preferably 30 mm, more preferably 25 mm, still more preferably 20 mm. By adjusting the thickness to the above range or less, the degree of knurl crushing can be optimized and the effective width of the film can be ensured.
  • the lower limit of the distance between the knurled protrusions is preferably 0.5 mm, more preferably 0.6 mm, and even more preferably 0.7 mm.
  • the upper limit of the distance between the knurled protrusions is preferably 3 mm, more preferably 2.5 mm, even more preferably 2 mm, and particularly preferably 1.5 mm.
  • the distance between the knurled projections is the distance between the center points of the projections.
  • the lower limit of the density of the knurled protrusions is preferably 10/cm 2 , more preferably 15/cm 2 , even more preferably 25/cm 2 , and particularly preferably 40/cm 2 . Yes, most preferably 60/cm 2 .
  • the upper limit of the density of knurled protrusions is preferably 400/cm 2 , more preferably 300/cm 2 , even more preferably 250/cm 2 , particularly preferably 200/cm 2 , and most preferably. is 160/cm 2 .
  • the resistance to crushing of the knurls can be adjusted by adjusting the density of the convex portions of the knurls.
  • knurls By keeping the knurls within the above range, it is possible to improve the resistance to crushing by relatively simple knurling without applying an excessive load to the apparatus. Makes adjustments easier. In addition, knurling that does not easily collapse can be easily performed within the range of an appropriate ratio of the height of each knurl to the area of the convex portion.
  • the arrangement of the knurled protrusions is not particularly limited, and may be arranged vertically and horizontally, arranged in a zigzag arrangement in which adjacent uneven arrangements are shifted by half a cycle, or arranged in a 1/3 or 1/4 adjacent uneven arrangement. Any of the staggered oblique arrangements are possible.
  • the material of the knurling is preferably metal.
  • the metal include SUS, stainless steel, aluminum, titanium, and hard chromium.
  • the surface of the knurling may be plated.
  • the lower limit of the knurl diameter is preferably 3 cm, more preferably 5 cm.
  • the upper limit of the knurl diameter is preferably 30 cm, more preferably 25 cm, even more preferably 20 cm.
  • a knurling machine having an appropriate size can be obtained by setting the above range.
  • the lower limit of the knurl thickness is preferably 3 mm, more preferably 5 mm, and even more preferably 7 mm.
  • the upper limit of the thickness of the knurling is preferably 50 mm, more preferably 40 mm, still more preferably 30 mm.
  • protrusions are provided on the outer peripheral portion of the knurling according to the arrangement of the knurled protrusions to be imparted.
  • the lower limit of the height of the knurling protrusions is preferably 0.05 mm, more preferably 0.1 mm, even more preferably 0.15 mm, and particularly preferably 0.2 mm.
  • the upper limit of the height of the knurling protrusions is preferably 3 mm, more preferably 2.5 mm, still more preferably 2 mm, and particularly preferably 1.5 mm.
  • the shape of the knurled protrusions may be circular, elliptical, triangular, square, rectangular, rhombic, trapezoidal, pentagonal, hexagonal, or more polygonal, when viewed from above.
  • a rhombus is preferred.
  • the three-dimensional shape may be a pyramid shape such as a cone or a polygonal pyramid, or a truncated pyramid shape such as a truncated cone or a polygonal truncated pyramid.
  • a knurl provided in a truncated cone shape tends to be less likely to be crushed, and can be appropriately selected.
  • the area of each flat portion of the upper surface of the projections of the knurling is preferably 40000 ⁇ m 2 or more, more preferably 50000 ⁇ m 2 or more, still more preferably 60000 ⁇ m 2 or more, particularly preferably 70000 ⁇ m 2 or more, and 80000 ⁇ m. 2 or more is most preferred.
  • the area of each flat portion of the upper surface of the projections of the knurls is preferably 200,000 ⁇ m 2 or less, more preferably 170,000 ⁇ m 2 or less, even more preferably 150,000 ⁇ m 2 or less, and particularly preferably 130,000 ⁇ m 2 or less.
  • the angle of the slope of the projections of the knurling is preferably 25 degrees or more and less than 90 degrees, more preferably 30 degrees or more and 80 degrees or less, and still more preferably 40 degrees or more and 70 degrees or less. is.
  • the angle of the slope of the projections of the knurling is 45 degrees or less, the area of each flat portion of the upper surface of the projections of the knurling may be 10000 ⁇ m 2 or more and less than 40000 ⁇ m 2 .
  • the angle of the slope of the projection of the knurling is the angle of the plane with the largest angle.
  • the total area of the flat portions on the upper surface of the projections of the knurling is preferably 1% or more, more preferably 3%, with respect to the area of the outer periphery of the knurling where the projections are provided. Above, more preferably 5% or more, particularly preferably 8% or more, and most preferably 10% or more.
  • the total area is preferably 50% or less, more preferably 40% or less, still more preferably 30% or less, and particularly preferably 20% or less.
  • the thickness By setting the thickness within the above range, the effect of the truncated cone shape can be exhibited more reliably, and knurling that is resistant to crushing can be easily performed within the range of an appropriate ratio of the height per knurl to the area of the convex portion. In addition, waviness due to elongation of the knurled portion can also be suppressed.
  • the angle of the crest is preferably 30 degrees or more, more preferably 60 degrees or more, still more preferably 80 degrees or more, particularly preferably 90 degrees or more, and most preferably 100 degrees or more.
  • the angle of the peak is the angle of the peak in the cross section where the angle of the peak is the smallest when the cross section is taken in the vertical direction passing through the peak. Since the peak may be rounded, the angle of the peak is defined as the angle of two straight lines connecting the peak and a point 50 ⁇ m below the hillside to the left and right of the peak.
  • the film When knurling, the film may be sandwiched between knurls and knurled on both sides. In this case, it may be a pair of knurls that mesh with the unevenness of each other's knurls, or a pair of knurls that perform knurling independently of each other without meshing. Further, on the opposite side of the knurling, only one side may be knurled using a smooth roll.
  • a method of knurling only one side by using a smooth roll on the opposite side of the knurl is used from the viewpoint of generating a larger strain for the same knurl height and forming protrusions that are resistant to crushing. more preferred.
  • Knurling requires the film to be strongly pressed against the knurling, and the height of the knurls can be adjusted with this pressing force.
  • the lower limit of the pressing force is preferably 20N, more preferably 40N, still more preferably 50N.
  • the upper limit of the pressing force is preferably 2000N, more preferably 1500N, still more preferably 1000N.
  • knurling When knurling is performed by knurling, there are two methods: a method in which the knurling is not heated (cold knurling method) and a method in which the knurling is heated to the softening temperature (for example, the glass transition temperature (Tg)) of the film or higher (hot knurling method).
  • Tg glass transition temperature
  • hot knurling method the hot knurling method tends to make the knurls less likely to be crushed, but it is necessary to control the knurl surface temperature according to the knurl processing speed, and the knurls are retracted so that the film does not fuse when the table stops due to breakage. complex process control may be required.
  • the present invention it is possible to form knurls that are resistant to crushing even by the cold knurling method by appropriately selecting the shape of the knurling protrusions, and the cold knurling method is preferable from the viewpoint of simplicity of process control.
  • the lower limit of the surface temperature of the knurling is preferably 10°C, more preferably 20°C.
  • the surface temperature of the knurling is preferably equal to or higher than the Tg of the film resin, more preferably (Tg+20°C) or higher, still more preferably (Tg+50°C) or higher.
  • the surface temperature of the knurling is preferably below the melting point, more preferably below (melting point ⁇ 10° C.), further preferably below (melting point ⁇ 20° C.).
  • the knurl surface temperature is preferably 80 to 250°C, more preferably 100 to 240°C, and even more preferably 120 to 230°C.
  • a method of flowing heated fluid such as oil into the knurling, induction heating, infrared heating, hot air, etc. are used.
  • the edge of the film may be preheated with infrared rays or hot air.
  • the lower limit of the knurling speed is preferably 20 m/min, more preferably 30 m/min, and still more preferably 50 m/min.
  • the upper limit of the knurling speed is preferably 800 m/min, more preferably 600 m/min, and still more preferably 500 m/min.
  • the speed of knurling is limited by the processing speed associated with knurling, such as slitting and coating. Further, for example, the knurl height can be adjusted by adjusting the pressing pressure of the knurl or the like, the knurl surface temperature, and the knurling speed.
  • the lower limit of the knurl height immediately after knurling is preferably 1.5 ⁇ m, more preferably 2 ⁇ m, and still more preferably 2.5 ⁇ m.
  • the upper limit of the knurl height immediately after knurling is preferably 15 ⁇ m, more preferably 12 ⁇ m, even more preferably 10 ⁇ m, particularly preferably 7 ⁇ m, most preferably 6 ⁇ m.
  • Freshly knurled knurls may have portions that easily collapse when wound into a roll. This is because, in the case of cold knurling, the film is pushed out to the opposite side of the knurling by the protrusions of the knurling to form knurling, but even the extruded knurling has portions that are easily dented by pressure, and in the case of hot knurling, However, the protrusions on the opposite side of the knurling are also crushed, and the resin builds up around the knurling protrusions. , that a portion with a high swelling is easily collapsed even with a low pressure, and the like.
  • the initial knurl height is measured from the outermost layer of the film immediately after being wound into a roll.
  • the initial knurl height is preferably adjusted so as to be the knurl height of the surface layer portion and the winding core portion, which will be described later, in consideration of the above.
  • the knurled film is preferably wound into a roll on a cylindrical core.
  • the lower limit of the winding tension is preferably 50 N/m, more preferably 60 N/m, still more preferably 70 N/m, particularly preferably 80 N/m, most preferably 90 N/m.
  • the upper limit of the winding tension is preferably 330 N/m, more preferably 300 N/m, still more preferably 270 N/m, particularly preferably 250 N/m, most preferably 230 N/m.
  • the lower limit of the winding contact pressure of the touch roll is preferably 30 N/m, more preferably 40 N/m, even more preferably 50 N/m, particularly preferably 60 N/m.
  • the upper limit of the winding contact pressure of the touch roll is preferably 600 N/m, more preferably 500 N/m, even more preferably 400 N/m, particularly preferably 300 N/m.
  • the right side, left side, surface layer portion, and winding core portion are as follows.
  • Right side The right end when the observer faces the roll and the film is unwound from the top of the roll toward the front.
  • Left side The left end portion when the film is unwound so that the observer faces the roll and the film is unwound from the top of the roll toward the front.
  • Surface layer 100 ⁇ 1 m from the winding end of the film wound into a roll.
  • Winding core part A part 100 ⁇ 1 m from the winding start of the film wound into a roll.
  • Knurl height on the right side of the surface layer Hner Knurl height on the left side of the surface layer: Hnel
  • Hne represents the knurl height of the surface layer without limiting the left and right sides
  • Knurl height on the right side of the winding core Hnbr Knurl height on the left side of the winding core: Hnbl
  • Hnb represents the knurl height of the winding core without limiting the left and right sides.
  • Hnser Height per knurl on the left side of the surface layer Hnsel Note that Hnse represents the height of each knurl on the surface layer without limiting the left and right sides.
  • Convex area per knurl on the right side of the surface layer Anser Convex area per knurl on the left side of the surface layer: Ansel Also, Anse represents the convex area per knurl of the surface layer without limiting the left and right.
  • the film In knurling by knurling, the film is usually pushed into the ridges of the knurling, stretching the molecules and forming knurls as protrusions on the opposite side of the knurling.
  • the height per knurl and the convex area per knurl as referred to in the present invention may be measured at the knurl formed on the opposite side of the knurl.
  • the resin is usually extruded on the knurling side to form a convex shape around the crest of the knurling, but a convex portion is also formed on the opposite side of the knurling. .
  • the relationship between the height of each knurl and the area of the convex portion of the present invention can be applied to the convex portion on the opposite side of the knurl.
  • the lower limit of the ratio (Hnse/Anse) of the height per knurl (Hnse) to the convex area (Anse) per knurl in the surface layer is preferably 1.5 for both the right and left knurls.
  • ⁇ 10 -5 / ⁇ m more preferably 1.7 ⁇ 10 -5 / ⁇ m, still more preferably 2 ⁇ 10 -5 / ⁇ m, particularly preferably 2.3 ⁇ 10 -5 / ⁇ m and most preferably 2.5 ⁇ 10 ⁇ 5 / ⁇ m.
  • the upper limit of the ratio of the height per knurl to the convex area per knurl (Hnse/Anse) of the surface layer is preferably 17.5 ⁇ 10 ⁇ 5 / ⁇ m for both the right and left knurls. More preferably 15 ⁇ 10 ⁇ 5 / ⁇ m, still more preferably 12 ⁇ 10 ⁇ 5 / ⁇ m, particularly preferably 10 ⁇ 10 ⁇ 5 / ⁇ m, most preferably 7 ⁇ 10 ⁇ 5 / ⁇ m ⁇ m.
  • the lower limit of the density of protrusions of knurls on the surface layer is preferably 10/cm 2 , more preferably 15/cm 2 , still more preferably 25/cm 2 , and particularly preferably 40/cm 2 . cm 2 , most preferably 60/cm 2 .
  • the upper limit of the density of knurled protrusions on the surface layer is preferably 400/cm 2 , more preferably 300/cm 2 , even more preferably 250/cm 2 , and particularly preferably 200/cm 2 . , most preferably 160/cm 2 .
  • the crushability of the knurls and the appearance of the film roll can be adjusted by the ratio of the height per knurl to the area of the projections per knurl (Hnse/Anse).
  • the ratio (Hnse/Anse) of the height of each knurl on the surface layer to the area of the convex portion of each knurl (Hnse/Anse) within the above range, the crushing of the knurls in the winding core can be effectively suppressed, and the It is possible to reduce the amount of charge, prevent scratches on the surface of the film, prevent misalignment and wrinkles, and ensure flatness.
  • knurling can be performed in a stable state even by using a knurl having a shape that is relatively easy to process.
  • the contact area between the film and the knurled protrusions during knurling must be
  • it is preferable to make the protrusions of the knurls have a truncated conical shape, particularly preferably to increase the tip angle of the conical protrusions and to increase the tip area of the trapezoidal protrusions.
  • the lower limit of the height (Hnse) per knurl in the surface layer portion is preferably 2 nm, more preferably 2.5 ⁇ m, even more preferably 3 nm, particularly preferably 3.5 nm, and most preferably 4 nm.
  • the upper limit of the height (Hnse) per knurl in the surface layer portion is preferably 12 nm, more preferably 10 nm, still more preferably 9 nm, particularly preferably 8 nm, and most preferably 7 nm.
  • the lower limit of the convex area per surface knurl is preferably 20,000 ⁇ m 2 , more preferably 40,000 ⁇ m 2 , even more preferably 60,000 ⁇ m 2 , and particularly preferably 70,000 ⁇ m 2 .
  • the upper limit of the convex area per surface knurl is preferably 300,000 ⁇ m 2 , more preferably 270,000 ⁇ m 2 , even more preferably 250,000 ⁇ m 2 , particularly preferably 230,000 ⁇ m 2 , and most preferably 220,000 ⁇ m 2 . be.
  • the lower limit of the ratio of the knurled protrusion area of the surface layer per unit area is preferably 0.05, more preferably 0.06, even more preferably 0.07, and particularly preferably 0.08.
  • the upper limit of the ratio of the knurled protrusion area of the surface layer per unit area is preferably 0.35, more preferably 0.3, still more preferably 0.25, and particularly preferably 0.2.
  • the ratio of the knurl convex area per unit area can be obtained by the convex area per knurl x the number of knurl convex parts per unit area (number of knurl convex parts/unit area; density of knurl convex parts). can.
  • the area of protrusions per knurl is A ⁇ m 2 and the number of protrusions per unit area of knurls is N/ ⁇ m 2 (for example, in the case of the knurl having A-type protrusions in the example, 10 ⁇ 6 number/ ⁇ m 2 ), the ratio of the area of the knurled protrusions per unit area can be obtained by A ⁇ N.
  • each knurl convex area per unit area for example, to arrange knurls with small convex area at high density. is not sufficient, and it is preferable to increase the area of each knurled convex portion.
  • the present inventors discovered that the height of each knurl increases as the area of each knurl protrusion increases, which can deteriorate the winding appearance of the film roll. It has been found that it is more preferable to adjust the ratio of the convex area per area to the above range.
  • the height (Hnse) per knurl of the surface layer and the convex area (Anse) per knurl can be obtained using a scanning white light interference microscope. A detailed measurement method will be described later in Examples.
  • the knurls on the right side and the left side of the surface layer portion and the roll core portion of the long film wound into a roll are in the states described below.
  • the right side, left side, surface layer portion, and winding core portion are as follows.
  • Right side The right end when the observer faces the roll and the film is unwound from the top of the roll toward the front.
  • Left side The left end portion when the film is unwound so that the observer faces the roll and the film is unwound from the top of the roll toward the front.
  • Surface layer 100 ⁇ 1 m from the winding end of the film wound into a roll.
  • Winding core part A part 100 ⁇ 1 m from the winding start of the film wound into a roll.
  • the lower limit of the knurl height (Hnb) of the winding core is preferably 0.5 ⁇ m, more preferably 0.7 ⁇ m, even more preferably 0.9 ⁇ m for both the right and left knurls. It is preferably 1 ⁇ m, most preferably 1.1 ⁇ m.
  • the upper limit of the knurl height (Hnb) of the winding core is preferably 4 ⁇ m, more preferably 3.5 ⁇ m, even more preferably 3.2 ⁇ m, and particularly preferably 3.2 ⁇ m for both the right and left knurls. 3 ⁇ m.
  • the lower limit of the knurl height (Hne) of the surface layer is preferably 1.2 ⁇ m, more preferably 1.3 ⁇ m, still more preferably 1.4 ⁇ m, and particularly preferably both the right and left knurls. is 1.5 ⁇ m, most preferably 1.6 ⁇ m.
  • the upper limit of the knurl height (Hne) of the surface layer is preferably 6 ⁇ m, more preferably 5 ⁇ m, still more preferably 4 ⁇ m, and particularly preferably 3.7 ⁇ m for both the right and left knurls. , most preferably 3.5 ⁇ m.
  • the crushing of the knurl usually reaches a steady state in about one month after being wound into a roll. Therefore, it is preferable to measure the height per knurl, the convex area per knurl, and the knurl height after one month or more has elapsed after winding into a roll.
  • the lower limit of the residual ratio of nals is preferably 0.3, more preferably 0.35, still more preferably 0.4, and particularly preferably 0.4 for both right and left nals. 0.45.
  • the upper limit of the residual ratio of nals (Hnb/Hne) is preferably 0.9, more preferably 0.85, even more preferably 0.8, particularly preferably 0.8 for both right and left nals. 0.75, most preferably 0.7.
  • the knurl residual ratio (Hnb/Hne) can be set within a range depending on the type of knurl, initial knurl height, knurl shape, knurl width, uniformity of knurl height, winding tension, winding length, and the like.
  • the lower limit of the amount of reduction in knurl is preferably 0.2 ⁇ m, more preferably 0.23 ⁇ m, still more preferably 0.25 ⁇ m, and particularly preferably 0.25 ⁇ m for both right and left knurls. 0.28 ⁇ m, most preferably 0.3 ⁇ m.
  • the upper limit of the reduction in knurl (Hne-Hnb) is preferably 3 ⁇ m, more preferably 2.7 ⁇ m, even more preferably 2.5 ⁇ m, and particularly preferably 2.0 ⁇ m for both right and left knurls. 2 ⁇ m, most preferably 2 ⁇ m.
  • the knurl reduction amount (Hne-Hnb) is determined by the knurl type, initial knurl height, knurl shape, knurl width, knurl height uniformity, and winding. It can be within the range depending on the tension, winding length, etc.
  • the unwinding electrification amount is reduced, the film surface is prevented from being damaged, the winding shift and wrinkles are prevented, and flatness is ensured. can do.
  • These effects can be improved in a more preferable direction by setting the knurl height of the surface layer portion and the knurl reduction amount within the above ranges.
  • the knurl height of the winding core and the knurl height of the surface layer are determined by the ratio of the height per knurl to the convex area per knurl, as well as the type of knurl, initial knurl height, knurl shape, knurl width, It can be within the range depending on the winding tension, winding contact pressure, winding length and the like.
  • ) on the left and right sides of the winding core is preferably 0, more preferably 0.01.
  • ) on the left and right sides of the winding core is preferably 0.3, more preferably 0.25, It is more preferably 0.2, and particularly preferably 0.15.
  • ) on the left and right sides of the surface layer is preferably 0, more preferably 0.01.
  • ) on the left and right sides of the surface layer is preferably 0.3, more preferably 0.25, and further It is preferably 0.2, particularly preferably 0.15.
  • the amount of unwinding charge is reduced, and scratches, miswinding and wrinkles on the film surface are prevented, and flatness is improved. can be ensured, and meandering and slack can be prevented when the film is unwound from the roll and processed.
  • Differences in knurl height between left and right tend to occur due to differences in length in the width direction of the film, differences in physical properties such as elastic modulus, and differences in tension in the width direction during winding.
  • the difference between the left and right sides is minimized by precisely controlling the parallelism of the transport rolls until the film is wound up, and by controlling the temperature, etc., so that there is no difference in physical properties during film formation such as stretching and heat setting. can do.
  • the charge amount when unwinding is kept low to the core part, so when unwinding and processing such as coating, the coating liquid It is possible to obtain a flawless coating film with less repelling and thickness unevenness.
  • the upper limit of the unwinding charge amount at the winding core is preferably 25 kV, more preferably 20 kV, still more preferably 15 kV, and particularly preferably 12 kV in absolute value.
  • the absolute value of the lower limit of the unwinding charge amount at the winding core is preferably 0.1 kV, more preferably 0.5 kV.
  • the laminated film of the present invention is preferably obtained by applying a coating liquid to at least one surface of a long resin film to laminate a coating film.
  • a method for producing a laminated film may include a step (A) of unwinding a long resin film, and a step (B) of coating a coating liquid on at least one side of the unwound long resin film. preferable.
  • Resins used in coating liquids include resins such as polyester, acrylic resin, polyurethane (polyester polyurethane, polycarbonate polyurethane, polyether polyurethane), ethylene vinyl acetate copolymer, polyamide, styrene acrylic copolymer, polyvinyl alcohol, and radiation curing.
  • Acrylic monomers, acrylic oligomers, and polymerizable liquid crystal compounds are preferably used if a flexible coating film is to be provided. Among them, acrylic monomers, acrylic oligomers, and polymerizable liquid crystal compounds are preferably used.
  • a radiation-curable coating liquid may be solventless.
  • the lower limit of the thickness of the resulting coating film after drying is preferably 0.001 ⁇ m, more preferably 0.005 ⁇ m, even more preferably 0.01 ⁇ m, and particularly preferably 0.02 ⁇ m.
  • the upper limit of the thickness of the resulting coating film after drying is preferably 20 ⁇ m, more preferably 15 ⁇ m, even more preferably 10 ⁇ m, particularly preferably 7 ⁇ m, and most preferably 5 ⁇ m.
  • the resulting coating film is preferably an optically functional coating film such as a hard coat layer, an antiglare layer, an antireflection layer, a low reflection layer, and a retardation layer.
  • the coating film obtained may be an adhesive layer or a pressure-sensitive adhesive layer.
  • films provided with a coating film include antiglare films, low reflection films, antireflection films, transparent conductive film substrates, polarizer protective films, retardation films in which the retardation layer is made of a liquid crystal compound, and the like.
  • a thin layer transfer film for transferring the functional layer is preferred.
  • the central portion of the width of the knurl was observed with a scanning white light microscope, and the scanning measurement was carried out by arranging one knurl convex part at the center of the observation field.
  • a region excluding the knurled convex portion was selected and a quartic surface correction was performed.
  • the Peak value is read, and the average value measured at a total of 7 points along the MD at intervals of about 5 cm for each of the right and left sides of the film is the height per knurl (Hnse).
  • the area in the field of view was measured with a threshold value of 0.5 ⁇ m. It was defined as the convex area (Anse) per piece.
  • a sample used for measurement was wound into a roll, stored at room temperature for one month, and then unwound from the film, and sampled from the surface layer thereof.
  • the right side, left side, and surface layer are as follows.
  • Right side The right end when the observer faces the roll and the film is unwound from the top of the roll toward the front.
  • Left side The left end portion when the film is unwound so that the observer faces the roll and the film is unwound from the top of the roll toward the front.
  • Surface layer A portion of 100 m from the winding start of the film wound into a roll.
  • the abbreviations for the height per knurl at each location, the convex area per knurl, and their ratio are as follows.
  • Height per knurl on the right side of the surface layer Hnser Height per knurl on the left side of the surface layer: Hnsel Convex area per knurl on the right side of the surface layer: Anser Convex area per knurl on the left side of the surface layer: Ansel Ratio of height and convex area per knurl on the right side of the surface layer: Hnser/Anser Ratio of height and convex area per knurl on the left side of the surface layer: Hnsel/Ansel
  • Knurl height Digital micrometer (Sony Manufacturing Systems Inc. ⁇ -mate M-30 was used. The central part of the knurl width was measured at 10 points along the MD at intervals of about 5 cm, and the average value was taken as the knurl part thickness, Ten points were measured along the MD at intervals of about 5 cm about 1 cm inside from the knurl, and the average value was taken as the film portion thickness, and the knurl portion thickness - the film portion thickness was taken as the knurl height. The film was wound into a roll and stored at room temperature for 1 month.
  • the right side, left side, surface layer portion, and winding core portion are as follows.
  • Right side The right end when the observer faces the roll and the film is unwound from the top of the roll toward the front.
  • Left side The left end portion when the film is unwound so that the observer faces the roll and the film is unwound from the top of the roll toward the front.
  • Surface layer side 100 m from the winding end of the film wound into a roll.
  • Winding core part A part 100 m from the winding start of the film wound into a roll.
  • Knurl height on the right side of the surface layer Hner Knurl height on the left side of the surface layer: Hnel Knurl height on the right side of the winding core: Hnbr Knurl height on the left side of the winding core: Hnbl
  • Knurl height uniformity It is as follows. Core part left and right knurl height uniformity: absolute value of (Hnbr - Hnbl) / [(Hnbr + Hnbl) / 2] Surface layer part left and right knurl height uniformity: absolute value of (Hner - Hnel) / [(Hner + Hnel) / 2] value
  • the mixture was heated to 255° C., the pressure of the reaction system was gradually reduced, and the mixture was reacted under a reduced pressure of 30 Pa for 1 hour and 30 minutes to obtain a copolymerized polyester resin.
  • the resulting copolymerized polyester resin was pale yellow and transparent.
  • the reduced viscosity of the copolymerized polyester resin was measured, it was 0.70 dl/g.
  • the glass transition temperature by DSC was 40°C.
  • polyester aqueous dispersion 30 parts by mass of a polyester resin and 15 parts by mass of ethylene glycol n-butyl ether were placed in a reactor equipped with a stirrer, a thermometer and a reflux device, and the resin was dissolved by stirring while heating at 110°C. After the resin was completely dissolved, 55 parts by mass of water was gradually added while stirring the polyester solution. After completion of the addition, the mixture was cooled to room temperature while being stirred to obtain a milky white polyester water dispersion having a solid content of 30% by mass.
  • a coating liquid was prepared by mixing the following raw materials. The coating liquid was filtered through a 10 ⁇ m filter with a nominal filtration accuracy of 95% cut of 10 ⁇ m particles.
  • Water 40.61% by mass Isopropanol 30.00% by mass Polyester water dispersion 11.67% by mass Polyvinyl alcohol aqueous solution 15.00% by mass
  • Block isocyanate-based cross-linking agent (aqueous solution) 0.67% by mass Particles (silica sol with an average particle size of 100 nm, solid content concentration of 40% by mass) 1.25% by mass
  • Catalyst organotin compound solid content concentration 14% by mass
  • 0.3% by mass Surfactant sicon type, solid content concentration 10% by mass
  • a urethane resin containing an aliphatic polycarbonate polyol as a constituent component was produced by the following procedure. 43.75 parts by mass of 4,4-diphenylmethane diisocyanate, 12.85 parts by mass of dimethylolbutanoic acid, a number of 153.41 parts by mass of polyhexamethylene carbonate diol having an average molecular weight of 2,000, 0.03 parts by mass of dibutyltin dilaurate, and 84.00 parts by mass of acetone as a solvent were added, and the mixture was stirred at 75°C for 3 hours under a nitrogen atmosphere to form a reaction solution. reached the desired amine equivalent weight.
  • a dropping funnel 16 parts by mass of 2-isopropenyl-2-oxazoline as a polymerizable unsaturated monomer having an oxazoline group, methoxypolyethylene glycol acrylate (average number of moles of ethylene glycol added: 9 mol, Shin-Nakamura Chemical A mixture of 32 parts by mass of the product (manufacturer) and 32 parts by mass of methyl methacrylate was added and added dropwise over 1 hour at 70°C under a nitrogen atmosphere. After completion of the dropwise addition, the reaction solution was stirred for 9 hours and cooled to obtain a water-soluble resin having an oxazoline group with a solid content concentration of 40% by mass.
  • a coating liquid for forming a coating layer having excellent adhesion to the functional layer was prepared by mixing the following raw materials.
  • the coating liquid was filtered through a 10 ⁇ m filter with a nominal filtration accuracy of 95% cut of 10 ⁇ m particles.
  • the temperature was raised to 260° C. over 15 minutes, and 0.012 parts by mass of trimethyl phosphate was added. After 15 minutes, dispersion treatment was performed with a high-pressure disperser. After 15 minutes, the obtained esterification reaction product was transferred to a polycondensation reactor, and polycondensation reaction was performed at 280°C under reduced pressure.
  • the product is filtered through a NASLON filter with a 95% cut diameter of 5 ⁇ m, extruded from a nozzle in the form of a strand, and cooled and solidified using cooling water that has been previously filtered (pore size: 1 ⁇ m or less). , cut into pellets.
  • the resulting polyethylene terephthalate resin had an intrinsic viscosity of 0.68 dL/g and contained substantially no inert particles or internal precipitated particles (hereinafter abbreviated as PET).
  • PET pellets were dried at 135°C for 6 hours under reduced pressure (1 Torr), supplied to an extruder, and melted at 285°C.
  • Each of the molten polymers is filtered through a stainless steel sintered filter medium (nominal filtration accuracy: 5 ⁇ m, 95% cut of particles), extruded in sheet form from a die, and then cast at a surface temperature of 30° C. using an electrostatic casting method. It was wrapped around a drum, cooled and solidified to form an unstretched film.
  • the casting drum used had a surface roughness Ra of 2 nm or less and an Rz of 15 nm or less.
  • P1 was applied to one side of the unstretched PET film, and P2 was applied to the opposite side so that the coating amount after drying was 0.12 g/m 2 . Dried for seconds.
  • the unstretched film having the coating layer formed thereon was guided to a tenter stretching machine, and while holding the ends of the film with clips, was guided to a hot air zone at a temperature of 135° C. and stretched 4.0 times in the width direction.
  • a hot air zone at a temperature of 135° C. and stretched 4.0 times in the width direction.
  • it was treated at a temperature of 225 ° C. for 30 seconds, and then cut at both ends of the film cooled to 130 ° C. with a shear blade, and a tension of 0.5 kg / mm 2
  • the film was wound up to obtain a uniaxially oriented PET film A having a film thickness of 70 ⁇ m.
  • the intrinsic viscosity of the entire film was 0.65 dL/g.
  • the resulting film A was slit to a width of 1,300 mm, knurled at both ends, and wound up with the knurled surface facing outward to obtain a roll of 3,500 m in length.
  • the roll was placed in a polyethylene bag, the opening of which was tied with rubber, side plates larger than the outer diameter of the roll were fitted to both ends of the core, and the roll was stored at a temperature of 25°C.
  • the Sa of film A was 1.0 nm on the P1 surface and 1.2 nm on the P2 surface, and the Sq was 1.3 nm on the P1 surface and 1.5 nm on the P2 surface.
  • Film B was produced in the same manner as film A except that coating with coating liquid P1 was not performed (only one side was coated with P2) and the thickness was 50 ⁇ m, and slitting and knurling were performed in the same manner. and got a roll. During coating, the coating solution was circulated through a 10 ⁇ m filter. Sa of Film B was 0.8 nm on the uncoated side and 1.2 nm on the P2 side, and Sq was 1.1 nm on the P1 side and 1.5 nm on the P2 side.
  • the knurling was carried out by passing the left and right ends of the slit film between an upper roll with knurling and a lower roll with mirror finish, and adjusting the pressing pressure of the upper roll to adjust the height of the knurled portion. Heating of the knurling was performed by induction heating. Distance from knurled part and film edge: 3 mm Knurl processing speed: 185m/min
  • Square pyramid type (A type): base length 1000 ⁇ m ⁇ 1000 ⁇ m, height 900 ⁇ m Square pyramid type (B type): base length 1000 ⁇ m ⁇ 1000 ⁇ m, height 330 ⁇ m Square pyramid type (F type): square pyramid type (A type) polished to a height of 600 ⁇ m square pyramid type (G type): square pyramid type (A type) polished to a height of 700 ⁇ m or a thickness of 20 mm , 100 mm in diameter, and 20 protrusions of the following shape are arranged on the outer peripheral surface with a length of 10 mm at an angle of 45 degrees (20 x 20 protrusions for 10 mm x 10 mm).
  • Square pyramid type (C type) base length 500 ⁇ m ⁇ 500 ⁇ m, height 900 ⁇ m Alternatively, it has a disk shape with a thickness of 20 mm and a diameter of 100 mm, and 21 protrusions of the following shape are arranged on the outer peripheral surface at an angle of 45 degrees with a length of 10 mm (21 x 21 for 10 mm x 10 mm). protrude).
  • Square pyramid type (D type) base length 400 ⁇ m ⁇ 400 ⁇ m, height 900 ⁇ m Alternatively, it has a disk shape with a thickness of 20 mm and a diameter of 100 mm. protrude).
  • Examples 1-13, Comparative Examples 1-2 Using film A and film B, the results of knurling under each condition are shown in Table 1 as examples and comparative examples.
  • the film A and the film B were provided with a coating film as follows. Two rolls of the film were prepared under the same conditions. One was used for knurl height measurement, unwinding charge amount measurement, and evaluation of roll winding state, and the other was used for paint coating evaluation. board.
  • the winding tension was 150 N/m, which is the tension at the time of winding the film around a cylindrical core after knurling at both ends of the film.
  • the winding contact pressure was 130 N/m, which is the winding contact pressure of the touch roll when winding was performed while pressing the touch roll.
  • a roll of film A is unwound, and an antiglare layer paint having the following composition is applied to the easily adhesive layer P2 surface with a gravure coater, dried in an oven at 90 ° C., and then irradiated with ultraviolet rays to cure the coating film.
  • a glaring layer was provided.
  • (Composition of paint for antiglare layer) KAYARAD PET-30 manufactured by Nippon Kayaku Co., Ltd. 38.7 parts by mass Viscoat #360 manufactured by Osaka Organic Chemical Industry Co., Ltd. 9.7 parts by mass Eposter MA1006 manufactured by Nippon Shokubai Co., Ltd. 0.1 parts by mass Irgacure 184 1.5 Parts by mass Methyl isobutyl ketone 30.0 parts by mass Methyl ethyl ketone 20.0 parts by mass Fluorosurfactant 0.02 parts by mass
  • a roll of Film B was unwound, and a photo-alignment layer coating composition having the following composition was applied to the surface not provided with the easy-adhesion layer using a gravure coater, and dried at 80° C. to form a film having a thickness of 150 nm. Subsequently, it was irradiated with polarized UV light to obtain a substrate film laminated with a photo-alignment layer.
  • the polarization direction of the UV light was set at 45 degrees with respect to the longitudinal direction of the film B. (Paint for photo-alignment layer) Based on the descriptions of Examples 1, 2, and 3 of JP-A-2013-33248, a 5% by mass solution of a polymer represented by the following formula (1) in cyclopentanone was produced.
  • ⁇ There were several locations within 50 m where the antireflection state was slightly degraded. ⁇ : There were several locations within 50 m where the antireflection state was clearly degraded. x: There were places where the antireflection state was frequently degraded within 50 m.
  • the present invention it is possible to provide a film that suppresses the occurrence of winding misalignment and wrinkles during storage, transportation, etc., does not damage the film surface, and has excellent film flatness.
  • the amount of charge when the film is unwound is small, the coating film is less repelled when the film is coated, and a coating film with excellent thickness accuracy is provided to the end of the film. It is possible to provide a film that can be

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Abstract

L'invention a pour but de fournir, dans un long film enroulé en forme de rouleau, un long film dans lequel des stries sont peu susceptibles d'être écrasées et une accumulation statique pendant le déroulement est supprimée sur le noyau d'enroulement, et en outre, un long film dans lequel l'apparition d'un écart d'enroulement et d'un plissement est supprimée pendant le stockage et le transport et une planéité élevée est maintenue. L'invention concerne un long film de résine enroulé en forme de rouleau, le long film de résine étant caractérisé en ce qu'un moletage est effectué à proximité des deux bords de la largeur de film, et le rapport (Hnse/Anse) de la hauteur (Hnse) par strie de la partie de couche de surface et de la zone convexe (Anse) par strie étant de 1,5×10-5 à 17,5×10-5/μm à la fois pour les stries de droite et stries de gauche des stries de droite et stries de gauche. De plus, lorsqu'un observateur fait face au rouleau et que le film est déroulé vers l'avant depuis la partie supérieure du rouleau, les stries sur le bord droit sont appelées stries de droite et les stries sur le bord gauche sont appelées stries de gauche.
PCT/JP2022/036726 2021-10-06 2022-09-30 Film de résine long, moleté WO2023058575A1 (fr)

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