JP6121091B2 - 偏光子及びその製造方法 - Google Patents
偏光子及びその製造方法 Download PDFInfo
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- JP6121091B2 JP6121091B2 JP2011173834A JP2011173834A JP6121091B2 JP 6121091 B2 JP6121091 B2 JP 6121091B2 JP 2011173834 A JP2011173834 A JP 2011173834A JP 2011173834 A JP2011173834 A JP 2011173834A JP 6121091 B2 JP6121091 B2 JP 6121091B2
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Classifications
-
- 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
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00634—Production of filters
- B29D11/00644—Production of filters polarizing
-
- 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
-
- 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
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00865—Applying coatings; tinting; colouring
- B29D11/00894—Applying coatings; tinting; colouring colouring or tinting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
-
- 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
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- 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
-
- 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
- G02F1/133528—Polarisers
-
- 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
- B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
- B29K2033/04—Polymers of esters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/704—Crystalline
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Ophthalmology & Optometry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Nonlinear Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Materials Engineering (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
前記膨潤工程において、ポリビニルアルコール系フィルムを1.4〜2.4倍延伸することにより、ポリビニルアルコール系フィルムの結晶化度を25〜32%に制御することを特徴とする偏光子の製造方法、に関する。
幅20mm×長さ30mm×厚み75μmのPVAフィルム(クラレ社製、商品名:VF−PS#7500)を延伸機にセットし、当該PVAフィルムを25℃の水中で延伸しながら、小角X線散乱法(Spring-8のビームライン、BL40B2にて実施、X線波長λ=1Å)により結晶化度を測定した。各延伸倍率における結晶化度を表1に示す。
作製した偏光子を120℃で乾燥させ、偏光子の重量を測定した。次に、純水に前記偏光子を完全溶解させて得られた溶液に、マンニトールおよび滴定指示薬としてブロモチモールブルーを添加し、そして、NaOH(0.1mol/L)水溶液を滴下した。溶液の色がオレンジ色から青色に変色した時にNaOH水溶液の滴下を止めて滴下量を測定した。偏光子中のホウ素含有量は下記式により算出した。
ホウ素含有量(重量%)=0.1×{NaOH水溶液の滴下量(ml)/1000}×
10.81×{1/偏光子の重量(g)}×100
(偏光子の作製)
厚み75μmのPVAフィルム(クラレ社製、商品名:VF−PS#7500)を、25℃の温水(膨潤浴)中に浸漬して膨潤させつつ、元長に対して延伸倍率が1.4倍になるように流れ方向に延伸した。その後、PVAフィルムをヨウ素濃度0.04%、ヨウ化カリウム濃度0.4%を含む30℃のヨウ素水溶液(染色浴)中に60秒間浸漬して、染色しながら、元長に対して延伸倍率が3.3倍になるように流れ方向に延伸した。次に、前記フィルムをホウ酸4重量%及びヨウ化カリウム3重量%を含む30℃の水溶液に30秒間浸漬した。その後、前記フィルムをホウ酸4重量%及びヨウ化カリウム5重量%を含む60℃の水溶液(延伸浴)中に40秒間浸漬しながら、元長に対して延伸倍率が6倍になるように流れ方向に延伸した。その後、前記フィルムをヨウ化カリウム3重量%を含む30℃の水溶液中に10秒間浸漬して洗浄し、さらに、50℃で4分間乾燥して偏光子を得た。
実施例1の膨潤工程において、延伸倍率を表1に示すように変更した以外は実施例1と同様の方法で偏光子を作製した。
実施例および比較例で得られた偏光子について、下記光学特性について評価した。結果を表1に示す。
380〜780nmの波長光における偏光子の分光透過率を、積分球付き分光光度計(日本分光株式会社製、商品名:V7100)を用いて測定した。各直線偏光に対する透過率はグランテラ−プリズム偏光子を通して得られた完全偏光を100%として測定した。測定された分光透過率よりCIE1931 Yxy表色系に従い、C光源2°視野でのY値を算出した。これらを単体透過率(Ts(Y))、平行透過率(Tp(Y))、直交透過率(Tc(Y))とした。
Claims (1)
- ポリビニルアルコール系フィルムに、膨潤工程、染色工程、架橋工程および延伸工程を少なくとも施す偏光子の製造方法において、
前記膨潤工程において、ポリビニルアルコール系フィルムを1.6〜2.0倍(ただし、2.0倍を除く)延伸することにより、ポリビニルアルコール系フィルムの結晶化度を28〜31%に制御し、
前記染色工程において、浸漬時間は20〜240秒間とし、
ホウ素含有量が4〜5.5重量%であり、単体透過率が43.0%以上、かつ偏光度が99.99%以上である偏光子を得ることを特徴とする偏光子の製造方法。
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