IT1261430B - Produzione di fogli polarizzatori. - Google Patents

Produzione di fogli polarizzatori.

Info

Publication number
IT1261430B
IT1261430B ITRM930188A ITRM930188A IT1261430B IT 1261430 B IT1261430 B IT 1261430B IT RM930188 A ITRM930188 A IT RM930188A IT RM930188 A ITRM930188 A IT RM930188A IT 1261430 B IT1261430 B IT 1261430B
Authority
IT
Italy
Prior art keywords
production
polyvinyl alcohol
polarizing sheets
sheet
dichroic
Prior art date
Application number
ITRM930188A
Other languages
English (en)
Original Assignee
Agfa Gevaert Ag
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 Agfa Gevaert Ag filed Critical Agfa Gevaert Ag
Publication of ITRM930188A0 publication Critical patent/ITRM930188A0/it
Publication of ITRM930188A1 publication Critical patent/ITRM930188A1/it
Application granted granted Critical
Publication of IT1261430B publication Critical patent/IT1261430B/it

Links

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
    • 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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2029/00—Use of polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals or derivatives thereof as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0034—Polarising
    • 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
    • C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
    • C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
    • C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polarising Elements (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

Il procedimento per la produzione di un foglio polarizzatore a base di alcool polivinilico e di almeno una sostanza dicroica, mediante colaggio oppure estrusione di un miscuglio di alcool polivinilico-solvente, nel qual caso l'alcool polivinilico contiene la sostanza dicroica, mediante essiccamento e stiro del foglio di 300 fino a 1200%, nel quale in dipendenza dalla larghezza del foglio non stirato bo viene prevista una fenditura di stiro 1°, che soddisfa la condizione bo/1o < 3, porta a quozienti di estinzione dicroici più elevati.
ITRM930188A 1992-04-08 1993-03-24 Produzione di fogli polarizzatori. IT1261430B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4211779A DE4211779A1 (de) 1992-04-08 1992-04-08 Herstellung von Polarisationsfolien

Publications (3)

Publication Number Publication Date
ITRM930188A0 ITRM930188A0 (it) 1993-03-24
ITRM930188A1 ITRM930188A1 (it) 1994-09-24
IT1261430B true IT1261430B (it) 1996-05-23

Family

ID=6456374

Family Applications (1)

Application Number Title Priority Date Filing Date
ITRM930188A IT1261430B (it) 1992-04-08 1993-03-24 Produzione di fogli polarizzatori.

Country Status (6)

Country Link
US (1) US5326507A (it)
JP (1) JPH0651123A (it)
KR (1) KR100266849B1 (it)
BE (1) BE1006402A3 (it)
DE (1) DE4211779A1 (it)
IT (1) IT1261430B (it)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4434964A1 (de) * 1994-09-30 1996-04-04 Agfa Gevaert Ag Polarisationsfolie
JP4485045B2 (ja) * 2000-11-15 2010-06-16 株式会社クラレ 延伸加工用ビニルアルコール系重合体フィルムの製造法
AU2002355836B8 (en) * 2001-07-27 2008-02-21 Insight Equity, A.P.X, LP Light polarizing film with melanin
TWI247664B (en) * 2002-10-31 2006-01-21 Kuraray Co A process for producing polarizing film
US7354150B2 (en) * 2004-08-18 2008-04-08 Insight Equity A.P.X., L.P. Polarizing plate with melanin
US20080083998A1 (en) * 2006-10-06 2008-04-10 3M Innovative Properties Company Multiple draw gap length orientation process
US20080085383A1 (en) * 2006-10-06 2008-04-10 3M Innovative Properties Company Processes for improved optical films
KR101483806B1 (ko) * 2007-04-03 2015-01-16 코니카 미놀타 어드밴스드 레이어즈 인코포레이티드 셀룰로오스 에스테르 광학 필름, 해당 셀룰로오스 에스테르 광학 필름을 이용한 편광판 및 액정 표시 장치, 셀룰로오스 에스테르 광학 필름의 제조 방법, 및 공중합체
AU2010230351A1 (en) 2009-03-31 2011-10-06 Dsm Ip Assets B.V. Method and device for producing a polymer tape
KR102106174B1 (ko) 2013-07-08 2020-05-04 현대트랜시스 주식회사 테이퍼 롤러 베어링의 그리스 충진 장치
US10611106B2 (en) 2015-02-15 2020-04-07 Roger Wen Yi Hsu Methods and systems for making an optical functional film
US20160238859A1 (en) * 2015-02-15 2016-08-18 Roger Wen Yi Hsu Methods And Systems For Making An Optical Functional Film
EP3502768A1 (en) 2017-12-20 2019-06-26 Essilor International Polarized eyewear with selective blocking
EP3670146B1 (en) 2018-12-21 2023-04-12 Essilor International Method and system for producing a gradient polarisation film

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2344117A (en) * 1938-12-09 1944-03-14 Vierling Otto Method of making polarizing filters
US3015989A (en) * 1958-01-27 1962-01-09 Polaroid Corp Light-polarizing film materials and process of preparation
US3254562A (en) * 1961-10-26 1966-06-07 Polaroid Corp Process for polarizing ultraviolet light utilizing oriented, polyphenyl stained film
US3265777A (en) * 1963-07-29 1966-08-09 Alvin M Marks Light polarizing film and fibre forming method
DE1779150C2 (de) * 1968-07-12 1973-01-04 Kalle Ag, 6202 Wiesbaden-Biebrich Verfahren zum Herstellen monoaxial gestreckter Folienbändchen
US3613155A (en) * 1969-04-07 1971-10-19 Dan E Bloxsom Apparatus for stretching thermoplastic
US4134957A (en) * 1970-10-26 1979-01-16 Toyobo Co., Ltd. Method of stretching polypropylene films
SU404643A1 (ru) * 1971-08-30 1973-10-22 Устройство для растяжения полимерных поляроидных пленок
JPS5269477A (en) * 1975-12-09 1977-06-09 Toshiba Machine Co Ltd Method of manufacturing poly vinyl alcohol film
JPS53139678A (en) * 1977-05-11 1978-12-06 Toyobo Co Ltd Preparation of polyene polarizing film
JPS55135807A (en) * 1979-04-10 1980-10-23 Citizen Watch Co Ltd Production of color polarizing film
US4842781A (en) * 1984-02-29 1989-06-27 Mitsui Toatsu Chemicals, Inc. Colored polarizing film and method of making same
JPS62156602A (ja) * 1985-12-27 1987-07-11 Tsutsunaka Plast Kogyo Kk ニユ−トラルグレイ色偏光膜の製造方法
DE3615765A1 (de) * 1986-05-10 1987-11-12 Bayer Ag Polarisatoren auf polyacetylenbasis und ihre herstellung
JP2663440B2 (ja) * 1987-06-12 1997-10-15 三菱瓦斯化学株式会社 偏光フィルムの製造方法
DE3889256T2 (de) * 1987-07-03 1994-08-11 Unitika Ltd Polarisierende Folie und Verfahren zur Herstellung derselben.
US4895769A (en) * 1988-08-09 1990-01-23 Polaroid Corporation Method for preparing light polarizer
DE3905027A1 (de) * 1988-12-21 1990-06-28 Bayer Ag Hochwirksame polarisatoren
DE3905519A1 (de) * 1989-02-23 1990-08-30 Bayer Ag Hochwirksame polarisatoren
JPH03182701A (ja) * 1989-12-13 1991-08-08 Nippon Kayaku Co Ltd 延伸フィルム及びその製造法
JP3268556B2 (ja) * 1990-04-05 2002-03-25 株式会社クラレ 偏光フィルムの製造法

Also Published As

Publication number Publication date
US5326507A (en) 1994-07-05
ITRM930188A0 (it) 1993-03-24
JPH0651123A (ja) 1994-02-25
DE4211779A1 (de) 1993-10-14
KR100266849B1 (ko) 2000-09-15
BE1006402A3 (fr) 1994-08-16
ITRM930188A1 (it) 1994-09-24
KR930021360A (ko) 1993-11-22

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970429