TW200730887A - A method for producing the light diffusing film, and the light diffusing film - Google Patents
A method for producing the light diffusing film, and the light diffusing filmInfo
- Publication number
- TW200730887A TW200730887A TW095149201A TW95149201A TW200730887A TW 200730887 A TW200730887 A TW 200730887A TW 095149201 A TW095149201 A TW 095149201A TW 95149201 A TW95149201 A TW 95149201A TW 200730887 A TW200730887 A TW 200730887A
- Authority
- TW
- Taiwan
- Prior art keywords
- light diffusing
- diffusing film
- light
- producing
- longitudinal
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
-
- 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
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
-
- 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
- B29K2067/00—Use of polyesters 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Optical Elements Other Than Lenses (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
To provide a process for producing a light diffusing film having excellent heat resistance and light transmittance of biaxially oriented film origin, and having excellent mechanical strength and light transmissivity, and a light diffusing film obtained therefrom. The process for producing a light diffusing film is characterized in that the light diffusing film having a light diffusing layer obtained by biaxially stretching an unextended sheet which consists of a mixture comprising 50 to 99% by mass of a crystalline polyester and 1 to 50% by mass of a light diffusing additive, and the above biaxial stretching is conducted at a stretch ratio in longitudinal and transversal directions of 2.5 times or more respectively and at a stretch velocity of less than 300%/sec. The light diffusing film is characterized in that it is made by the above process and has a total light transmissivity, of 85% or more, a haze of 50% or more, a dimensional change ratio at 150° C in the longitudinal and transversal directions of 3% or less respectively, and a tensile strength in the longitudinal and transversal directions of 100 MPa or more.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005378311 | 2005-12-28 | ||
JP2005378312A JP4715510B2 (en) | 2005-12-28 | 2005-12-28 | Light diffusion film |
JP2005378313A JP4715511B2 (en) | 2005-12-28 | 2005-12-28 | Light diffusion film |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200730887A true TW200730887A (en) | 2007-08-16 |
TWI350388B TWI350388B (en) | 2011-10-11 |
Family
ID=38218074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW095149201A TWI350388B (en) | 2005-12-28 | 2006-12-27 | A method for producing the light diffusing film, and the light diffusing film |
Country Status (2)
Country | Link |
---|---|
TW (1) | TWI350388B (en) |
WO (1) | WO2007074853A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008093478A1 (en) * | 2007-01-31 | 2008-08-07 | Toyo Boseki Kabushiki Kaisha | Surface light-diffusing polyester film |
JP4370538B1 (en) * | 2008-08-06 | 2009-11-25 | 東洋紡績株式会社 | Surface light diffusing polyester film |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3921790B2 (en) * | 1998-03-19 | 2007-05-30 | 東レ株式会社 | Light diffusion polyester film |
JP4517442B2 (en) * | 2000-03-28 | 2010-08-04 | 東レ株式会社 | Method for producing laminated light diffusing film |
JP3912159B2 (en) * | 2002-03-29 | 2007-05-09 | Jsr株式会社 | Optical film, method for producing the same, and polarizing plate |
JP2004174788A (en) * | 2002-11-26 | 2004-06-24 | Toray Ind Inc | Biaxially oriented laminated polyester film |
JP2005181648A (en) * | 2003-12-19 | 2005-07-07 | Mitsubishi Polyester Film Copp | Light scattering polyester film for prism sheet |
-
2006
- 2006-12-27 TW TW095149201A patent/TWI350388B/en not_active IP Right Cessation
- 2006-12-27 WO PCT/JP2006/326013 patent/WO2007074853A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
TWI350388B (en) | 2011-10-11 |
WO2007074853A1 (en) | 2007-07-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |