WO2017038955A1 - Rouleau de film d'alcool polyvinylique - Google Patents

Rouleau de film d'alcool polyvinylique Download PDF

Info

Publication number
WO2017038955A1
WO2017038955A1 PCT/JP2016/075731 JP2016075731W WO2017038955A1 WO 2017038955 A1 WO2017038955 A1 WO 2017038955A1 JP 2016075731 W JP2016075731 W JP 2016075731W WO 2017038955 A1 WO2017038955 A1 WO 2017038955A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
roll
pva
winding
less
Prior art date
Application number
PCT/JP2016/075731
Other languages
English (en)
Japanese (ja)
Inventor
佐藤　直人
弘治 笹井
秀行 秦
正次 亀岡
高士 ▲はま▼岡
翔太 山本
Original Assignee
株式会社クラレ
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 株式会社クラレ filed Critical 株式会社クラレ
Priority to CN201680051126.9A priority Critical patent/CN107922142B/zh
Priority to KR1020197038870A priority patent/KR102375984B1/ko
Priority to KR1020187007187A priority patent/KR20180039151A/ko
Priority to JP2017538118A priority patent/JP6815321B2/ja
Publication of WO2017038955A1 publication Critical patent/WO2017038955A1/fr

Links

Images

Classifications

    • 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
    • B65H18/28—Wound package of webs
    • 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
    • B65H18/16—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web by friction roller
    • 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
    • B65H18/26—Mechanisms for controlling contact pressure on winding-web package, e.g. for regulating the quantity of air between web layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/175—Plastic
    • B65H2701/1752—Polymer film

Definitions

  • the present invention relates to a roll of a polyvinyl alcohol film having a good appearance and a method for producing the roll.
  • a polarizing plate which is a basic component of a liquid crystal display (LCD) such as a liquid crystal television or a liquid crystal monitor, is generally dyed on a polyvinyl alcohol film (hereinafter, “polyvinyl alcohol” may be abbreviated as “PVA”).
  • PVA polyvinyl alcohol
  • a polarizing film by uniaxial stretching and further fixing treatment with a boron compound or the like as required, and then bonding a protective film such as a cellulose triacetate (TAC) film on the surface of the obtained polarizing film Manufactured.
  • TAC cellulose triacetate
  • the PVA film is usually stored or transported in the form of a roll in which a long PVA film is wound around a cylindrical core (see, for example, Patent Document 2).
  • a roll of a PVA film having a wider width, a longer winding length and excellent quality is required. ing.
  • Patent Document 2 discloses a method of passing a PVA film between a guide roll attached to a cylindrical core tube and the core tube and winding the PVA film around the cylindrical core tube, the guide roll and the cylinder A winding method is described in which the guide core and the cylindrical core tube are in contact with each other via the PVA film, in a non-contact state in which the cylindrical core tube is installed at a distance.
  • a slight wrinkle or eccentricity in which the center of gravity of the roll is shifted occurs, and a roll having a good appearance shape cannot be obtained.
  • a roll of PVA film is used as a raw fabric, there is a problem that the uniformity of the PVA film is impaired due to fluctuations occurring when the PVA film is unwound.
  • the present invention has been made to solve the above-described problems, and provides a roll of a PVA film having a good appearance shape that is less likely to cause wrinkles and eccentricity even when the PVA film is thin and the winding length is long.
  • the purpose is to do.
  • the present inventors have solved the above problems by setting the interval (the thickness of the air layer) between the PVA films wound around the roll to a specific range. As a result of further investigation based on this finding, the present invention was completed.
  • the present invention [1] A roll formed by winding a PVA film having a thickness of 45 ⁇ m or less and a length of 2,000 m or more, and an average interval between adjacent films is 5 ⁇ m or less; [2] The roll of the above [1], wherein the width of the PVA film is 2 m or more; [3] The roll of [1] or [2] above, wherein the content of the plasticizer in the polyvinyl alcohol film is 1 to 30% by mass; [4] The roll according to any one of [1] to [3], wherein the content of the surfactant in the polyvinyl alcohol film is 0.01 to 1.0% by mass; [5] The roll according to any one of the above [1] to [4], wherein the width of the polyvinyl alcohol film is 2 m or more; [6] The roll according to any one of [1] to [5] above, wherein the PVA film is a raw film for producing an optical film; [7] The roll of the above [6], wherein the optical
  • a roll of a PVA film having a good appearance shape even when the PVA film is thin and the winding length is long is provided. According to the manufacturing method of the present invention, such a roll is efficiently manufactured.
  • FIG. 1 it is an example of the schematic diagram of the film roll 1 and the contact roll 2 seen from the direction 11 of the tangent 10 of the contact roll 2 in the position where the contact roll 2 contacts the film roll 1.
  • FIG. 1 it is an example of the schematic diagram of the film roll 1 and the contact roll 2 seen from the horizontal direction 12.
  • the roll of the present invention is formed by winding a PVA film having a thickness of 45 ⁇ m or less and a length of 2,000 m or more. And in the roll of this invention, the average space
  • a metal core is more preferable because it is less susceptible to wear and the like even after repeated use.
  • the proportion of the mass of the metal and plastic with respect to the total mass of the cylindrical core is preferably 50% by mass or more, more preferably 80% by mass or more, and further preferably 95% by mass or more.
  • the amount is preferably 100% by mass.
  • Examples of the metal include iron, stainless steel, and aluminum. One of these may be used alone, or two or more may be used in combination. Among these, aluminum and iron are preferable from the viewpoints of strength, lightness, and price.
  • plastic examples include polyvinyl chloride, polyvinylidene chloride, polyester, polycarbonate, polyamide, epoxy resin, polyurethane, polyurea, and silicone resin. One of these is used alone. Moreover, you may use 2 or more types together. Of these, polyvinyl chloride is preferred.
  • the plastic is also preferably a fiber reinforced plastic (FRP) such as a carbon fiber reinforced plastic from the viewpoint of strength and the like.
  • FRP fiber reinforced plastic
  • the length of the cylindrical core is not particularly limited, but it is preferably 5 to 100 cm longer than the width of the PVA film to be wound from the viewpoint of handleability and the like, and is preferably 10 to 45 cm. Is more preferable, and it is more preferable that the length is within a range of 15 to 30 cm.
  • the diameter of the cylindrical core is not particularly limited, but the outer diameter is preferably in the range of 50 to 800 mm, more preferably in the range of 80 to 500 mm, from the viewpoints of strength and handleability.
  • the thickness is more preferably in the range of 100 to 300 mm, and particularly preferably in the range of 150 to 250 mm.
  • the thickness of the cylindrical core is preferably in the range of 2 to 50 mm, more preferably in the range of 3 to 20 mm, and more preferably in the range of 4 to 10 mm from the viewpoints of strength, handleability, and the like. More preferably, it is within.
  • PVA constituting the PVA film used in the present invention includes, for example, unmodified PVA obtained by saponifying a polyvinyl ester obtained by polymerizing vinyl ester, and a modified copolymer obtained by graft copolymerization with a main chain of PVA.
  • PVA a modified polyvinyl ester obtained by saponifying a modified polyvinyl ester obtained by copolymerizing a vinyl ester and a comonomer, a part of hydroxyl groups of the modified PVA, unmodified PVA or modified PVA is cross-linked with aldehydes such as formalin, butyraldehyde, benzaldehyde, etc.
  • aldehydes such as formalin, butyraldehyde, benzaldehyde, etc.
  • a polyvinyl acetal resin etc. can be mentioned.
  • the amount of modification in the PVA is preferably 15 mol% or less, and more preferably 5 mol% or less.
  • Examples of the vinyl ester used in the production of PVA include vinyl formate, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl valelate, vinyl pivalate, vinyl laurate, vinyl stearate, vinyl benzoate, and versatic.
  • a vinyl acid etc. can be mentioned.
  • These vinyl esters can be used alone or in combination. Of these vinyl esters, vinyl acetate is preferred from the viewpoint of productivity.
  • Examples of the above-mentioned comonomer include olefins having 2 to 30 carbon atoms such as ethylene, propylene, 1-butene and isobutene ( ⁇ -olefin and the like); acrylic acid or a salt thereof; methyl acrylate, ethyl acrylate, Acrylic esters such as n-propyl acrylate, i-propyl acrylate, n-butyl acrylate, i-butyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate, dodecyl acrylate, octadecyl acrylate, etc.
  • acrylic acid having 1 to 18 carbon atoms of acrylic acid methacrylic acid or a salt thereof; methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, i-propyl methacrylate, n-butyl methacrylate, i -Butyl, tert-butyl methacrylate, methacrylate Methacrylic acid esters such as 2-ethylhexyl phosphate, dodecyl methacrylate, octadecyl methacrylate (for example, alkyl esters of 1 to 18 carbon atoms of methacrylic acid); acrylamide; N-methylacrylamide, N-ethylacrylamide, N, N Acrylamide derivatives such as dimethyl acrylamide, diacetone acrylamide, acrylamide propane sulfonic acid or salts thereof, acrylamide propyl dimethylamine or salts thereof, N-methylol acrylamide or derivatives thereof;
  • the degree of polymerization of PVA is preferably 1,000 or more, more preferably 1,500 or more, and more preferably 2,000 or more, from the viewpoint of the polarizing performance and durability of the obtained polarizing film. Further preferred. Moreover, from the viewpoint of ease of production for obtaining a homogeneous PVA film, stretchability, etc., the degree of polymerization of PVA is preferably 8,000 or less, and more preferably 6,000 or less.
  • the polymerization degree of PVA in this specification means an average polymerization degree measured according to the description of JIS K6726-1994, and is obtained from the intrinsic viscosity measured in water at 30 ° C. after re-saponifying and purifying PVA. .
  • the saponification degree of PVA is preferably 95 mol% or more, more preferably 98 mol% or more, and more preferably 99 mol% or more from the viewpoint of the polarizing performance and durability of the obtained polarizing film. Further preferred.
  • the saponification degree of PVA in this specification is the number of moles of the vinyl alcohol unit relative to the total number of moles of structural units (typically vinyl ester units) and vinyl alcohol units that can be converted to vinyl alcohol units by saponification. The ratio (mol%) which occupies.
  • the saponification degree of PVA can be measured according to the description of JIS K6726-1994.
  • PVA polymerization degree, a saponification degree, a modification degree, etc. differ
  • the PVA content in the PVA film is preferably in the range of 50 to 100% by mass, more preferably in the range of 80 to 100% by mass, and in the range of 85 to 100% by mass. Further preferred.
  • the film preferably contains a plasticizer.
  • Preferred plasticizers include polyhydric alcohols, and specific examples include ethylene glycol, glycerin, diglycerin, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and trimethylolpropane.
  • the PVA film can contain one or more of these plasticizers.
  • these plasticizers one or more of glycerin, diglycerin, and ethylene glycol are preferably used from the viewpoint of stretchability improvement effect when the PVA film is stretched and used, and glycerin is more preferable. Preferably used.
  • the content of the plasticizer in the PVA film is preferably in the range of 1 to 30% by mass.
  • the content of the plasticizer in the PVA film is less than 1% by mass, since the flexibility of the film is insufficient, there is a problem that the film is broken at the time of winding or the stretchability at the time of producing the polarizing plate is poor.
  • the content is more preferably 5% by mass or more, and further preferably 10% by mass or more.
  • the content of the plasticizer in the PVA film exceeds 30% by mass, the bleed out occurs during storage of the roll, and the uniformity of the physical properties may be impaired in the plane of the PVA film, The problem that film sticking easily occurs.
  • the content is more preferably 20% by mass or less, and further preferably 15% by mass or less.
  • the PVA film preferably contains a surfactant from the viewpoints of handleability and improvement in peelability from a film forming apparatus when the PVA film is produced.
  • a surfactant from the viewpoints of handleability and improvement in peelability from a film forming apparatus when the PVA film is produced.
  • anionic surfactant examples include carboxylic acid types such as potassium laurate; sulfate ester types such as octyl sulfate; sulfonic acid types such as dodecylbenzene sulfonate and the like.
  • nonionic surfactants include alkyl ether types such as polyoxyethylene lauryl ether and polyoxyethylene oleyl ether; alkyl phenyl ether types such as polyoxyethylene octyl phenyl ether; alkyl ester types such as polyoxyethylene laurate.
  • Alkylamine type such as polyoxyethylene lauryl amino ether
  • alkylamide type such as polyoxyethylene lauric acid amide
  • polypropylene glycol ether type such as polyoxyethylene polyoxypropylene ether
  • alkanolamide type alkanolamide type
  • allyl phenyl ether type such as polyoxyalkylene allyl phenyl ether.
  • the PVA film can contain one or more of these surfactants.
  • these surfactants nonionic surfactants are preferred because of their excellent effect of reducing film surface abnormalities during film formation, and alkanolamide type surfactants are particularly preferred, and aliphatic carboxylic acids (for example, Further, dialkanolamides (for example, diethanolamide and the like) of C8-30 saturated or unsaturated aliphatic carboxylic acid and the like are more preferable.
  • the surfactant content in the PVA film is preferably in the range of 0.01 to 1% by mass.
  • the handleability of a PVA film and the peelability from the film forming apparatus at the time of manufacturing a PVA film may deteriorate more, or blocking may generate
  • the content of the surfactant is more preferably 0.02% by mass or more, and further preferably 0.05% by mass or more.
  • the content of the surfactant is more preferably 0.5% by mass or less, and further preferably 0.3% by mass or less.
  • the PVA film further contains other components such as antioxidants, ultraviolet absorbers, lubricants, colorants, antiseptics, antifungal agents, other polymer compounds other than those described above, and moisture as necessary. May be.
  • the PVA film can contain one or more of these other components.
  • the production method of the PVA film is not particularly limited, and a production method in which the thickness and width of the film after film formation are more uniform can be preferably adopted.
  • the above-described PVA constituting the PVA film, and further if necessary A film-forming stock solution in which one or more of plasticizers, surfactants and the above-mentioned other components are dissolved in a liquid medium, PVA, and further plasticizers, surfactants, and other It can be produced using a film-forming stock solution containing one or more of components and liquid medium and in which PVA is melted.
  • the film-forming stock solution contains at least one of a plasticizer, a surfactant and the other components, it is preferable that these components are mixed uniformly.
  • liquid medium used for the preparation of the membrane forming stock solution examples include water, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, N-methylpyrrolidone, ethylene glycol, glycerin, propylene glycol, diethylene glycol, triethylene glycol, and tetraethylene glycol. , Trimethylolpropane, ethylenediamine, diethylenetriamine and the like, and one or more of them can be used. Among these, water and dimethyl sulfoxide are preferable, and water is more preferable.
  • the volatile fraction of the film-forming stock solution depends on the degree of polymerization of PVA, the film-forming method, the film-forming conditions, However, it is preferably 20% by mass or more, more preferably 25% by mass or more, still more preferably 30% by mass or more, particularly preferably 40% by mass or more, and 95% by mass. It is preferably at most mass%, more preferably at most 90 mass%, further preferably at most 85 mass%, particularly preferably at most 70 mass%.
  • the volatile fraction of the film-forming stock solution When the volatile fraction of the film-forming stock solution is above the above lower limit, the viscosity of the film-forming stock solution does not become too high, and filtration and defoaming are smoothly performed during preparation of the film-forming stock solution, and there are few foreign matters and defects. Is easy to manufacture.
  • the volatile fraction of the film-forming stock solution is not more than the above upper limit, the concentration of the film-forming stock solution does not become too low, and the production of an industrial PVA film becomes easy.
  • Examples of the film forming method for forming a PVA film using the above-described film forming stock solution include a cast film forming method, an extrusion film forming method, a wet film forming method, and a gel film forming method. These film forming methods may be used alone or in combination of two or more. Among these film forming methods, the cast film forming method and the extrusion film forming method are preferable from the viewpoint of obtaining a good PVA film.
  • a known film discharge device such as a T-shaped slit die, a hopper plate, an I-die, or a lip coater die is used.
  • the film-forming stock solution is uniformly discharged or cast on the peripheral surface of the first heated heated roll (or belt) located on the most upstream side, and discharged or cast on the peripheral surface of the first roll (or belt).
  • a method of passing through a hot air drying apparatus can be preferably employed industrially. Drying with a heated roll and drying with a hot air dryer may be performed in an appropriate combination.
  • the thickness of the PVA film in the roll of the present invention needs to be 45 ⁇ m or less.
  • a thin polarizing film can be produced efficiently.
  • a thin polarizing plate can be efficiently manufactured by using such a thin polarizing film.
  • according to the present invention even when the PVA film is thin and the winding length is long, a roll of the PVA film having a good appearance shape that is less likely to cause wrinkles and eccentricity is obtained.
  • the thickness of the PVA film is preferably 40 ⁇ m or less, more preferably 35 ⁇ m or less, further preferably 30 ⁇ m or less, particularly preferably 25 ⁇ m or less, and 20 ⁇ m or less. Most preferred.
  • the thickness of the PVA film is preferably 1 ⁇ m or more, more preferably 3 ⁇ m or more, still more preferably 5 ⁇ m or more, and particularly preferably 10 ⁇ m or more.
  • the winding length of the PVA film in the roll of the present invention is required to be 2,000 m or more.
  • the length of the PVA film is 2,000 m or more, even if the optical film such as a polarizing film to be manufactured has a large area, it is possible to efficiently and continuously manufacture a product having excellent optical performance uniformity. it can.
  • the PVA film is thin and the winding length is long, there is a problem that slight wrinkles and eccentricity are generated and a roll having a good appearance shape cannot be obtained.
  • the length of the PVA film is preferably 3,000 m or more, more preferably 4,000 m or more, further preferably 5,000 m or more, and 8,000 m or more. It is particularly preferable that it is 12,000 m or more.
  • the said length is preferably 30,000 m or less, and is 22,000 m or less. It is more preferable that The length of the PVA film may be 18,000 m or less, and further 15,000 m or less.
  • the width of the PVA film is not particularly limited, and can be, for example, 50 cm or more.
  • the width of the PVA film is not particularly limited, and can be, for example, 50 cm or more.
  • the width of the PVA film is preferably 2 m or more, more preferably 2.5 m or more, further preferably 2.7 m or more, particularly preferably 3 m or more. It may be 5 m or more.
  • variety is preferably 6 m or less, and more preferably is 5 m or less. More preferably, it is 4.2 m or less. From the point that a PVA film having a particularly excellent external shape can be obtained, it is preferably 4 m or less, and more preferably 3.8 m or less.
  • the average interval between adjacent films is 5 ⁇ m or less.
  • the average interval corresponds to the thickness of the air layer between the films.
  • the average interval is preferably 4.9 ⁇ m or less, more preferably 4.5 ⁇ m or less, further preferably 4.2 ⁇ m or less, 4 ⁇ m or less, and further 3.8 ⁇ m. It may be the following.
  • the average interval is preferably 2 ⁇ m or more, more preferably 2.5 ⁇ m or more, further preferably 3 ⁇ m or more, and particularly preferably 3.5 ⁇ m or more.
  • the average distance between the adjacent films can be determined by the following method. That is, an average between the adjacent films in an outer diameter H (m) roll in which a PVA film having a length L (m) and a thickness M ( ⁇ m) is wound around a cylindrical core having an outer diameter D (m).
  • the manufacturing method of the present invention is a manufacturing method of a roll formed by winding a PVA film having a thickness of 45 ⁇ m or less and a length of 2,000 m or more, (A) In the winding process of the PVA film, a contact roll disposed substantially parallel to the axial direction of the film roll on the outer peripheral surface of the film roll (film-like portion) formed from the already wound PVA film The PVA film is wound up while contacting (B) The pressure between the film roll and the contact roll is 3 to 30 N per 1 m of the axial length of the film roll, (C) It is a manufacturing method whose winding speed is 30 m / min or less.
  • the PVA film used for producing the roll those described above as the PVA film used for producing the roll of the present invention can be used.
  • FIG. 1 is a schematic view showing an example of the touch winding method.
  • a contact roll 2 disposed substantially parallel to the axial direction of the film roll 1 is in direct contact with the outer peripheral surface of the film roll 1 formed from the already wound PVA film 3.
  • a roll is manufactured by further winding the PVA film 3 in a state.
  • the contact roll 2 to be used one that is longer than the axial length of the film roll 1 can be used.
  • the film roll 1 and the contact roll 2 are preferably in contact with each other over the entire axial direction of the film roll 1.
  • a near winding method as shown in a schematic diagram in FIG. 2 is known.
  • a space is formed between the outer peripheral surface of the film roll 1 formed from the already wound PVA film and the contact roll 2. Is held.
  • the length of the contact roll 2 is not particularly limited, but is preferably longer than the width of the film roll 1 within a range of 3 to 200 cm, more preferably within a range of 5 to 100 cm, and more preferably within a range of 10 to 50 cm. It is more preferable that the length is long.
  • the diameter of the contact roll 2 is not particularly limited, but from the viewpoint of strength, handleability, etc., the outer diameter is preferably in the range of 50 to 1000 mm, more preferably in the range of 75 to 800 mm. More preferably, it is within the range of 100 to 500 mm, and particularly preferably within the range of 125 to 350 mm.
  • the material of the surface layer of the contact roll 2 is not particularly limited, and examples thereof include rubber, resin, metal, etc. Among them, rubber is preferable.
  • the pressure between the film roll 1 and the contact roll 2 is the length of the film roll 1 in the axial direction.
  • the range is 3 to 30 N per meter.
  • the pressure may be referred to as “winding contact pressure”, and “N / m” may be used as a unit for indicating the pressure per 1 m in the axial length of the film roll.
  • the winding contact pressure is preferably 20 N / m or less, more preferably 10 N / m or less, and still more preferably 8 N / m or less. From the viewpoint of more efficiently producing the roll of the present invention, it is preferably 3.5 N / m or more, and more preferably 4 N / m or more.
  • the winding speed when winding the PVA film 3 is 30 m / min or less.
  • the winding speed is preferably 25 m / min or less.
  • the winding speed is preferably 9 m / min or more, and more preferably 15 m / min or more.
  • the winding tension when winding the PVA film 3 (the tension applied in the length direction of the PVA film 3 when winding the PVA film) is formed from the already wound PVA film. It is preferable to set it as 80 N or less per 1 m of axial lengths of the film roll 1.
  • N / m may be used as a unit for indicating the winding tension per 1 m in the axial direction of the film roll 1.
  • the winding tension is more preferably 75 N / m or less, and further preferably 70 N / m or less.
  • the winding tension is preferably 20 N / m or more, more preferably 40 N / m or more, and 45 N / m or more. More preferably, it is particularly preferably 50 N / m or more.
  • FIG. 3 is an example of a schematic diagram of the film roll 1 and the contact roll 2 viewed from the direction 11 of the tangent line 10 of the contact roll 2 at a position where the contact roll 2 contacts the film roll 1 in FIG.
  • the parallelism A between the axis of the film roll 1 and the axis of the contact roll 2, which is obtained from the distance between the axis of the film roll 1 and the axis of the contact roll 2 is preferably 0.7 mm or less.
  • the parallelism A is more preferably 0.5 mm or less, and further preferably 0.2 mm or less.
  • the parallelism A is determined by the distance ba from the one end b of the shaft 7 of the contact roll 2 to the shaft 6 of the film roll 1 and the axis of the film roll 1 from the other end b ′ of the shaft 7 of the contact roll 2.
  • the difference of distance b′ ⁇ a ′ up to 6 is shown.
  • One end b of the shaft 7 of the contact roll 2 is located closest to the end portion 8 of the PVA film 3, and the other end b ′ is located closest to the end portion 9 of the PVA film 3.
  • the distance b-a and the distance b'-a ' can be measured using a dial gauge.
  • FIG. 4 is an example of a schematic view of the film roll 1 and the contact roll 2 viewed from the horizontal direction 12 in FIG.
  • the axis of the film roll 1 when the film roll 1 and the contact roll 2 are viewed from the horizontal direction which is obtained from the level of the axis of the film roll 1 and the level of the axis of the contact roll 2.
  • the parallelism B of the axis of the contact roll 2 is preferably 0.2 mm or less.
  • the parallelism B is more preferably 0.15 mm or less, and further preferably 0.1 mm or less.
  • the parallelism B in the present invention will be specifically described below.
  • the axis 7 of the contact roll 2 is projected onto a plane including the axis 6 of the film roll 1 and perpendicular to the horizontal plane. Then, on the projection plane, a distance dc from one end d of the shaft 7 of the contact roll 2 to the shaft 6 of the film roll 1 and from the other end d ′ of the shaft 7 of the contact roll 2 to the shaft 6 of the film roll 1
  • the difference in distance d′ ⁇ c ′ is defined as parallelism B.
  • the parallelism B can be obtained by measuring the horizontal degrees in the axial direction of the film roll 1 and the contact roll 2 using a level.
  • the average distance between adjacent films is preferably 5 ⁇ m or less.
  • the average interval is preferably 4.9 ⁇ m or less, more preferably 4.5 ⁇ m or less, still more preferably 4.2 ⁇ m or less, even 4 ⁇ m or less, and even 3.8 ⁇ m or less.
  • the average interval is preferably 2 ⁇ m or more, more preferably 2.5 ⁇ m or more, further preferably 3 ⁇ m or more, and particularly preferably 3.5 ⁇ m or more.
  • the use of the PVA film in the roll of the present invention is not particularly limited.
  • a film for drug packaging, a base film for hydraulic transfer, a base film for embroidery, a release film for artificial marble molding, a film for seed packaging, a waste container It can be used for various water-soluble films such as a bag film.
  • a roll having a good appearance shape that is less likely to cause wrinkles and eccentricity is provided. If such a roll is used, an optical film having excellent optical performance uniformity can be efficiently and continuously manufactured even in a large area. Therefore, it is preferable to use the PVA film as a raw film for producing an optical film.
  • Examples of such an optical film include a polarizing film and a retardation film, and a polarizing film is preferable.
  • Such an optical film can be produced, for example, by applying a treatment such as uniaxial stretching using the above PVA film.
  • the method for producing a polarizing film using a PVA film is not particularly limited, and any conventionally known method may be adopted.
  • the PVA film unwound from the roll of the present invention is used for dyeing and uniaxial stretching, or the PVA film containing the dye unwound from the roll of the present invention is used.
  • the method of giving uniaxial stretching is mentioned.
  • the PVA film unwound from the roll of the present invention is swelled, dyed, uniaxially stretched, and if necessary, a crosslinking treatment, a fixing treatment
  • Examples of the method include drying and heat treatment.
  • the order of each treatment such as swelling, dyeing, crosslinking treatment, uniaxial stretching, and fixing treatment is not particularly limited, and one or two or more treatments can be performed simultaneously. Also, one or more of each process can be performed twice or more.
  • the produced polarizing film is usually used in the form of a polarizing plate by laminating a protective film that is optically transparent and has mechanical strength on one or both sides.
  • a protective film a cellulose triacetate (TAC) film, a cycloolefin polymer (COP) film, an acetic acid / cellulose butyrate (CAB) film, an acrylic film, a polyester film, or the like is used.
  • TAC cellulose triacetate
  • COP cycloolefin polymer
  • CAB acetic acid / cellulose butyrate
  • acrylic film a polyester film, or the like
  • polyester film or the like
  • the adhesive for bonding include PVA adhesives and urethane adhesives, among which PVA adhesives are suitable.
  • the polarizing plate obtained as described above can be used as an LCD component after being coated with an acrylic adhesive or the like and bonded to a glass substrate. At the same time, it may be bonded to a retardation film, a viewing angle improving film, a brightness improving film, or the like.
  • Sample films of 15 cm ⁇ 15 cm were collected from the center and both ends of the film rolls obtained in the following examples and comparative examples.
  • a polarizing film was produced by performing a swelling process, a dyeing process, a crosslinking process, a stretching process, a fixing process process, and a drying process on the PVA film.
  • Four sample films were attached to a stretching jig. While immersed in water at a temperature of 30 ° C. for 1 minute, it was uniaxially stretched (first-stage stretching) in the length direction (MD) to 2.2 times the original length. Thereafter, while being immersed in a dyeing bath at a temperature of 30 ° C.
  • a sample film of 5 cm ⁇ 5 cm is sampled from the center of the obtained polarizing film so that it is in a crossed Nicol state on one polarizing plate (single transmittance 43.5%, polarization degree 99.9%). installed.
  • Using a backlight with a brightness of 15,000 candela observe the difference in brightness between the film collected from the center of the film roll and the film sampled from the end (transmission unevenness).
  • Optical unevenness was evaluated.
  • B There is a slight difference in brightness between the film collected from the center and the film collected from both ends due to the difference in transmittance.
  • Example 1 PVA film composed of PVA having a polymerization degree of 2,400 and a saponification degree of 99 mol% or more (thickness 30 ⁇ m, length 20,000 m, width 4.2 m, containing 10% by mass of glycerin as a plasticizer, and laurin as a surfactant
  • a roll was produced by winding up 0.1% by mass of acid diethanolamide) around a cylindrical core.
  • the contact roll (outside diameter: 210 mm, roll length: placed on the outer peripheral surface of the film roll formed from the already wound PVA film substantially parallel to the axial direction of the film roll. 4950 mm) was used, and a touch winding method for winding the PVA film was adopted. Specific conditions are shown in Table 1.
  • the average distance between adjacent films in the obtained roll was 4.15 ⁇ m.
  • the external shape was evaluated by the said method.
  • the polarizing film was produced and the optical unevenness was evaluated by the above method. The results are shown in Table 1.
  • Examples 2-8, Comparative Examples 2-5 The thickness of the PVA film used for the roll, the length, the width, the plasticizer content and the surfactant content, and the roll production conditions were changed in the same manner as in Example 1 except that the production conditions for the roll were changed as shown in Table 1. Fabrication and evaluation were performed. The results are shown in Table 1.
  • Comparative Example 1 PVA film composed of PVA having a polymerization degree of 2,400 and a saponification degree of 99 mol% or more (thickness 30 ⁇ m, length 20,000 m, width 3.3 m, containing 10% by mass of glycerin as a plasticizer, and laurin as a surfactant A roll was produced by winding up 0.1% by mass of acid diethanolamide) around a cylindrical core. Note that the near winding method was adopted as the winding method. Specific conditions are shown below.
  • Reference example 1 PVA film composed of PVA having a polymerization degree of 2,400 and a saponification degree of 99 mol% or more (thickness 60 ⁇ m, length 9,600 m, width 4.2 m, containing 10% by mass of glycerin as a plasticizer, and laurin as a surfactant
  • a roll was produced by winding up 0.1% by mass of acid diethanolamide) around a cylindrical core. Note that the near winding method was adopted as the winding method. Specific conditions are shown below.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Moulding By Coating Moulds (AREA)
  • Winding Of Webs (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

Abstract

L'invention concerne : un rouleau obtenu par enroulement d'un film de PVA d'une longueur d'au moins 2 000 m et d'une épaisseur inférieure ou égale à 45 µm, où l'espace moyen entre films adjacents est inférieur ou égal à 5 μm ; et un procédé de fabrication d'un rouleau obtenu en enroulant un film de PVA d'une longueur d'au moins 2 000 m et d'une épaisseur inférieure ou égale à 45 µm, où un schéma d'enroulement par contact est utilisé, la pression entre un rouleau de film et un rouleau de contact est de 3 à 30 N par mètre de longueur axiale du rouleau de film, et la vitesse d'enroulement est inférieure ou égale à 30 m/min. Ainsi la présente invention concerne un rouleau de film de PVA qui a une apparence extérieure excellente et qui ne se ride pas et ne s'excentre pas facilement même lorsque le film de PVA est fin et a une grande longueur d'enroulement.
PCT/JP2016/075731 2015-09-02 2016-09-01 Rouleau de film d'alcool polyvinylique WO2017038955A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201680051126.9A CN107922142B (zh) 2015-09-02 2016-09-01 聚乙烯醇膜辊
KR1020197038870A KR102375984B1 (ko) 2015-09-02 2016-09-01 폴리비닐알코올 필름 롤
KR1020187007187A KR20180039151A (ko) 2015-09-02 2016-09-01 폴리비닐알코올 필름 롤
JP2017538118A JP6815321B2 (ja) 2015-09-02 2016-09-01 ポリビニルアルコールフィルムロール

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-172669 2015-09-02
JP2015172669 2015-09-02

Publications (1)

Publication Number Publication Date
WO2017038955A1 true WO2017038955A1 (fr) 2017-03-09

Family

ID=58187768

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/075731 WO2017038955A1 (fr) 2015-09-02 2016-09-01 Rouleau de film d'alcool polyvinylique

Country Status (5)

Country Link
JP (1) JP6815321B2 (fr)
KR (2) KR102375984B1 (fr)
CN (1) CN107922142B (fr)
TW (1) TWI666238B (fr)
WO (1) WO2017038955A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020054509A1 (fr) * 2018-09-11 2020-03-19 三菱ケミカル株式会社 Rouleau de film d'alcool polyvinylique et procédé de production associé

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002255409A (ja) * 2001-03-01 2002-09-11 Fuji Photo Film Co Ltd フイルムの巻き取り方法及びロール並びに保護フイルム
JP2006151569A (ja) * 2004-11-29 2006-06-15 Toray Ind Inc ロール、電気絶縁性シートの巻取装置および電気絶縁性シートロール体の製造方法
JP2009084127A (ja) * 2007-10-02 2009-04-23 Bridgestone Corp 合わせガラス中間膜用エチレン−酢酸ビニル共重合体樹脂フィルムロールの製造方法、及びこれにより得られる合わせガラス中間膜用エチレン−酢酸ビニル共重合体樹脂フィルムロール
JP2010111450A (ja) * 2008-11-04 2010-05-20 Kaneka Corp 樹脂フィルムロールの製造方法および樹脂フィルムロール
JP2013046966A (ja) * 2011-08-29 2013-03-07 Konica Minolta Advanced Layers Inc 光学フィルムの製造方法
WO2013146533A1 (fr) * 2012-03-28 2013-10-03 株式会社クラレ Film à base d'un polymère de type poly(alcool vinylique) et son procédé de production
WO2014132625A1 (fr) * 2013-02-27 2014-09-04 コニカミノルタ株式会社 Procédé de fabrication de rouleau de film optique
WO2015115359A1 (fr) * 2014-01-28 2015-08-06 株式会社クラレ Film maître permettant la production de film optique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3911465B2 (ja) * 2002-09-19 2007-05-09 日本合成化学工業株式会社 ポリビニルアルコール系フィルムの製法
DK1433730T3 (da) * 2002-10-25 2007-05-21 Reifenhaeuser Masch Opviklingsanordning og fremgangsmåde til udövelse af et opviklingsrörskifte i en opviklingsanordning
KR101515653B1 (ko) * 2007-05-14 2015-04-27 가부시키가이샤 구라레 수용성 폴리비닐알코올계 필름의 롤 형상물 및 그 보관 방법
KR101624072B1 (ko) 2012-09-26 2016-05-24 주식회사 쿠라레 폴리비닐알코올 필름 및 편광 필름
CN204211211U (zh) * 2014-09-25 2015-03-18 德清县兴士立塑料有限公司 一种涂布设备的收卷机构

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002255409A (ja) * 2001-03-01 2002-09-11 Fuji Photo Film Co Ltd フイルムの巻き取り方法及びロール並びに保護フイルム
JP2006151569A (ja) * 2004-11-29 2006-06-15 Toray Ind Inc ロール、電気絶縁性シートの巻取装置および電気絶縁性シートロール体の製造方法
JP2009084127A (ja) * 2007-10-02 2009-04-23 Bridgestone Corp 合わせガラス中間膜用エチレン−酢酸ビニル共重合体樹脂フィルムロールの製造方法、及びこれにより得られる合わせガラス中間膜用エチレン−酢酸ビニル共重合体樹脂フィルムロール
JP2010111450A (ja) * 2008-11-04 2010-05-20 Kaneka Corp 樹脂フィルムロールの製造方法および樹脂フィルムロール
JP2013046966A (ja) * 2011-08-29 2013-03-07 Konica Minolta Advanced Layers Inc 光学フィルムの製造方法
WO2013146533A1 (fr) * 2012-03-28 2013-10-03 株式会社クラレ Film à base d'un polymère de type poly(alcool vinylique) et son procédé de production
WO2014132625A1 (fr) * 2013-02-27 2014-09-04 コニカミノルタ株式会社 Procédé de fabrication de rouleau de film optique
WO2015115359A1 (fr) * 2014-01-28 2015-08-06 株式会社クラレ Film maître permettant la production de film optique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020054509A1 (fr) * 2018-09-11 2020-03-19 三菱ケミカル株式会社 Rouleau de film d'alcool polyvinylique et procédé de production associé
CN112533848A (zh) * 2018-09-11 2021-03-19 三菱化学株式会社 聚乙烯醇系薄膜卷及其制造方法

Also Published As

Publication number Publication date
CN107922142B (zh) 2021-02-26
KR20200003279A (ko) 2020-01-08
JPWO2017038955A1 (ja) 2018-05-31
KR102375984B1 (ko) 2022-03-17
TWI666238B (zh) 2019-07-21
CN107922142A (zh) 2018-04-17
JP6815321B2 (ja) 2021-01-20
KR20180039151A (ko) 2018-04-17
TW201718732A (zh) 2017-06-01

Similar Documents

Publication Publication Date Title
CN107001667B (zh) 聚乙烯醇系聚合物膜及其制造方法
JP4195017B2 (ja) ポリビニルアルコール系フィルムロール
KR20130124585A (ko) 폴리비닐알코올계 중합체 필름 및 그 제조 방법
JP6716553B2 (ja) ポリビニルアルコール系重合体フィルム及びその製造方法
TW201420313A (zh) 聚乙烯醇系聚合物薄膜及其製造方法
CN111405972B (zh) 聚乙烯醇膜和其制造方法
WO2016093259A1 (fr) Film polymère à base d'alcool polyvinylique, et procédé de fabrication de celui-ci
KR20170095181A (ko) 폴리비닐알코올 필름
JP2023083360A (ja) ポリビニルアルコール系フィルム、偏光膜および偏光板、ならびにポリビニルアルコール系フィルムの製造方法
WO2018016542A1 (fr) Procédé de production de film de polarisation
JP3516397B2 (ja) ポリビニルアルコールフィルムの製造法
JP7335697B2 (ja) ポリビニルアルコール系フィルム、偏光膜および偏光板、ならびにポリビニルアルコール系フィルムの製造方法
JP2017102436A (ja) ポリビニルアルコール系フィルム、およびそれを用いた偏光膜、偏光板、ならびにポリビニルアルコール系フィルムの製造方法
JP2004020630A (ja) 光学用ポリビニルアルコールフィルムおよびその製造方法
TWI676638B (zh) 聚乙烯醇系薄膜、聚乙烯醇系薄膜之製造方法及偏光膜
WO2017038955A1 (fr) Rouleau de film d'alcool polyvinylique
JP5496731B2 (ja) 位相差フィルム
JP7375042B2 (ja) 光学用ポリビニルアルコールフィルムの製造方法
JP2004017321A (ja) 偏光フィルムの製造法
TWI772409B (zh) 聚乙烯醇系薄膜、偏光膜、偏光板及聚乙烯醇系薄膜之製造方法
JP2002144355A (ja) ビニルアルコール系重合体フィルムの製造法および偏光フィルム
JP7413116B2 (ja) 偏光フィルムの製造方法
JP2004020636A (ja) 偏光フィルムの製造法
JP2014006538A (ja) 位相差フィルム

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16841984

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2017538118

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 20187007187

Country of ref document: KR

Kind code of ref document: A

122 Ep: pct application non-entry in european phase

Ref document number: 16841984

Country of ref document: EP

Kind code of ref document: A1