WO2016132893A1 - Procédé de production d'un film allongé, étiré en oblique - Google Patents

Procédé de production d'un film allongé, étiré en oblique Download PDF

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Publication number
WO2016132893A1
WO2016132893A1 PCT/JP2016/053084 JP2016053084W WO2016132893A1 WO 2016132893 A1 WO2016132893 A1 WO 2016132893A1 JP 2016053084 W JP2016053084 W JP 2016053084W WO 2016132893 A1 WO2016132893 A1 WO 2016132893A1
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WO
WIPO (PCT)
Prior art keywords
film
group
stretching
long
stretched
Prior art date
Application number
PCT/JP2016/053084
Other languages
English (en)
Japanese (ja)
Inventor
大介 北條
Original Assignee
コニカミノルタ株式会社
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 コニカミノルタ株式会社 filed Critical コニカミノルタ株式会社
Publication of WO2016132893A1 publication Critical patent/WO2016132893A1/fr

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Classifications

    • 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
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors

Definitions

  • the elongation at break of the raw film used for the production of the long diagonally stretched film is as low as 2% or more and 25% or less, and the original film is difficult to stretch.
  • a durable strong film (long diagonally stretched film) can be produced, and fluctuations in the orientation angle ⁇ associated with long-term use can be suppressed. Therefore, even when a circularly polarizing plate is produced using the obliquely stretched film and this is applied to an organic EL display device for a long period of time, the above-described ghost phenomenon is suppressed by suppressing fluctuations in the orientation angle ⁇ of the film. Can be prevented from occurring.
  • X represents a nonmetallic atom belonging to Groups 14-16.
  • X is preferably ⁇ O, ⁇ S, ⁇ NRc, ⁇ C (Rd) Re.
  • Rc, Rd, and Re represent substituents, and examples thereof are synonymous with specific examples of the substituents represented by Wa and Wb.
  • L 1, L 2, R 1 , R 2, R 3, n is L 1, L 2, R 1 , same meanings as R 2, R 3, n in the general formula (A).
  • cellulose acetate propionate is particularly preferably used as the cellulose acylate.
  • cellulose acetate propionate 0 ⁇ Y ⁇ 2.5 and 0.5 ⁇ X ⁇ 3.0 (where 2.0 ⁇ X + Y ⁇ 3.0) are preferable, and 0 More preferably, 0.5 ⁇ Y ⁇ 2.0 and 1.0 ⁇ X ⁇ 2.0 (where 2.0 ⁇ X + Y ⁇ 3.0).
  • the substitution degree of the acyl group can be measured according to ASTM-D817-96, which is one of the standards established and issued by ASTM (American Society for Testing and Materials).
  • the number average molecular weight of cellulose acylate is preferably in the range of 60,000 to 300,000, since the mechanical strength of the resulting film becomes strong. More preferably, cellulose acylate having a number average molecular weight of 70,000 to 200,000 is used.
  • This long film may be a single layer or a laminated film of two or more layers.
  • the laminated film can be obtained by a known method such as a coextrusion molding method, a co-casting molding method, a film lamination method, or a coating method. Of these, the coextrusion molding method and the co-casting molding method are preferable.
  • the range of the defect is the size of the shadow when the defect is observed with the transmitted light of the differential interference microscope when the defect is a bubble or a foreign object.
  • the defect is a change in the surface shape, such as transfer of a roll flaw or an abrasion
  • the size is confirmed by observing the defect with the reflected light of a differential interference microscope.
  • the web peeled from the support is further dried, and finally the residual solvent amount is 3% by mass or less, preferably 1% by mass or less, more preferably 0.5% by mass.
  • the residual solvent amount is 3% by mass or less, preferably 1% by mass or less, more preferably 0.5% by mass. The following is preferable in obtaining a film having good dimensional stability.
  • the thermoplastic resin original film formed by such a melt casting film forming method has a feature that the thickness direction retardation (Rt) is small.
  • stretching conditions different from the solution casting film-forming method may be required.
  • both stretching in the film traveling direction and stretching in the film width direction may be performed simultaneously or sequentially.
  • it may be only extending

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polarising Elements (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

Dans la présente invention, un film allongé, étiré obliquement est produit par étirage d'un long film brut contenant une résine thermoplastique dans une direction oblique présentant un angle supérieur à 0° mais inférieur à 90° par rapport à la direction de la largeur. Le film brut utilisé pour produire le film allongé, étiré obliquement présente un allongement à la rupture de 2 à 25 %.
PCT/JP2016/053084 2015-02-17 2016-02-02 Procédé de production d'un film allongé, étiré en oblique WO2016132893A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015028598 2015-02-17
JP2015-028598 2015-02-17

Publications (1)

Publication Number Publication Date
WO2016132893A1 true WO2016132893A1 (fr) 2016-08-25

Family

ID=56692253

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/053084 WO2016132893A1 (fr) 2015-02-17 2016-02-02 Procédé de production d'un film allongé, étiré en oblique

Country Status (1)

Country Link
WO (1) WO2016132893A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110320584A (zh) * 2018-03-28 2019-10-11 柯尼卡美能达株式会社 斜向拉伸膜、偏光板、异形显示装置以及斜向拉伸膜的制造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009116347A (ja) * 2008-12-24 2009-05-28 Fujifilm Corp 光学補償シート、偏光板、楕円偏光板および液晶表示装置
JP2011218814A (ja) * 2011-06-21 2011-11-04 Fujifilm Corp 熱可塑性フィルムの製造方法
JP2013202979A (ja) * 2012-03-29 2013-10-07 Konica Minolta Inc 斜め延伸フィルムの製造方法および製造装置
WO2013161581A1 (fr) * 2012-04-25 2013-10-31 コニカミノルタ株式会社 Procédé de fabrication d'un film étiré obliquement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009116347A (ja) * 2008-12-24 2009-05-28 Fujifilm Corp 光学補償シート、偏光板、楕円偏光板および液晶表示装置
JP2011218814A (ja) * 2011-06-21 2011-11-04 Fujifilm Corp 熱可塑性フィルムの製造方法
JP2013202979A (ja) * 2012-03-29 2013-10-07 Konica Minolta Inc 斜め延伸フィルムの製造方法および製造装置
WO2013161581A1 (fr) * 2012-04-25 2013-10-31 コニカミノルタ株式会社 Procédé de fabrication d'un film étiré obliquement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110320584A (zh) * 2018-03-28 2019-10-11 柯尼卡美能达株式会社 斜向拉伸膜、偏光板、异形显示装置以及斜向拉伸膜的制造方法
CN110320584B (zh) * 2018-03-28 2021-09-14 柯尼卡美能达株式会社 斜向拉伸膜、偏光板、异形显示装置以及斜向拉伸膜的制造方法

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