Coating Composition, Optical Film, Anti-reflection Film, Polarizing Plate, and Display Unit Using Them
a technology of anti-reflection film and coating composition, which is applied in the direction of polarizing elements, instruments, transportation and packaging, etc., can solve the problems of uneven leveling, uneven wind, and uneven drying, and achieve the effect of reducing drying unevenness and wind unevenness and not worsening level unevenness
Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- Publication Date
- 2007-12-20
Abstract
Description
TECHNICAL FIELD
[0001] The present invention relates to a coating composition, an optical film, an anti-reflection film, a polarizing plate, and a display unit using them. BACKGROUND ART
[0002] In recent years, the development of materials using various coating methods has been advanced. In particular, coating techniques of a thin layer of several micrometers to several hundred nanometers are required in the fields of optical film, printing and photolithography, and coating accuracy required is raised with thinning of films, enlarging of the size of substrates and the expedition of coating speed. Particularly in the manufacture of optical films, the control of film thickness is a very important point that influences optical performances, and demand for techniques capable of realizing high coating speed while maintaining high accuracy is becoming more and more high.
[0003] Anti-reflection films are generally arranged on the outermost surfaces of display units such as cathode ray tube...
Examples
example 1
[0410] An anti-reflection film sample was obtained by coating each of glare-proof hard coat layer coating solutions (HCL-2) to (HCL-8), and low refractive index layer coating solution (LL-2) as follows. Glare-proof hard coat layer coating solution used in each sample is shown in Table 1 below.
TABLE 1Coating SolutionCoatingSamplefor Glare-ProofFluorineSpeedWindLevelNo.RemarksHard Coat LayerPolymerI / O Value(m / min)UnevennessUnevennessProductivity101ComparisonHCL-2None—30x∘x102InventionHCL-3P-30.830∘∘∘103InventionHCL-4P-250.740∘∘∘104InventionHCL-5P-910.650∘∘∘105InventionHCL-6P-620.825∘∘∘106InventionHCL-7P-450.730∘∘∘107ComparisonHCL-8R-21.1830∘xx108InventionHCL-9P-1080.330∘∘∘109InventionHCL-10P-970.3130∘∘∘110ComparisonHCL-2None—25x∘x111InventionHCL-3P-30.815∘∘x112ComparisonHCL-8R-21.1810∘xx
(1) Coating of Glare-Proof Hard Coat Layer (Sample No. 101)
[0411] A triacetyl cellulose film having a thickness of 80 μm (TAC-TD80U, trade name, manufactured by Fuji Photo Film Co., Ltd.) in the fo...
example 2
[0414] Each anti-reflection film sample was obtained by coating hard coat layer coating solution (HCL-1), middle refractive index layer coating solution (ML-1), high refractive index layer coating solution (HL-1), (BL-2) or (HL-3), and low refractive index layer coating solution (LL-1) as follows. High refractive index layer coating solutions used in samples are as shown in Table 2.
TABLE 2Coating SolutionCoatingSamplefor High Refrac-FluorineSpeedWindLevelNo.Remarkstive Index LayerPolymerI / O Value(m / min)UnevennessUnevenness201ComparisonHL-1None—30x∘202InventionHL-2P-30.830∘∘203ComparisonHL-3R-21.330∘x
Manufacture of Anti-Reflection Film:
[0415] Hard coat layer coating solution (HCL-1) was coated on a triacetyl cellulose film having a thickness of 80 μm (TD-80UF, manufactured by Fuji Photo Film Co., Ltd.) with a micro gravure roll of a diameter of 50 mm and having a gravure pattern of line number 100 / inch and a doctor blade on the conditions of gravure rotation number of 90 rpm and ...