Optical film and optical sheet
A technology of optical sheets and optical films, which is applied in optics, optical components, nonlinear optics, etc., and can solve the problems that the maintenance of polarization ability of polarizers may not be satisfied.
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Embodiment 1 and comparative example 1-1～1-5
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[0057] Dissolve 3 g of norbornene resin (manufactured by JSR Corporation, product name ARTON F5023) and 30 mg of the ultraviolet absorber described in Tables 1 to 3 in 7 g of solvent (toluene / cyclohexane = 9 / 1), and prepare by casting method A film with a thickness of 40 μm was used to obtain a square protective film test piece with a side length of 2 cm.
[0058] The protective film test piece obtained by the above-mentioned production method was bonded to a polarizing plate (manufactured by SANRITZ Co., Ltd., product name Varilight LL-81-18, thickness 100 μm) whose pigment was iodine, and tested in a weather resistance tester (Sunshine Weather-O- Meter) (83°C, no rain, carbon arc light source) after 240 hours, overlap with a polarizer that has not been irradiated with light, and measure the absorbance in the overlapping state where the transmittance reaches the lowest at each wavelength of 400nm, 550nm, and 700nm . If the absorbance retention rate is 100% compare...
Embodiment 2-1～2-7 and comparative example 2-1～2-4
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[0077] With respect to 100 parts by mass of triacetyl cellulose resin (manufactured by DAICEL Chemical Industry Co., Ltd., product name LT-35), the ultraviolet absorber described in Table 2 or Table 3 was blended in the compounding amount described in Table 2 or Table 3, except Except for this, a film test piece was produced by the same production method as the production method of the protective film in Example 1 above.
[0078] The light resistance was evaluated by the retention rate (%) of the total light transmittance (%) after 360 and 480 hours in a weathering tester (83°C, no rain, carbon arc light source) for the film test piece obtained by the above-mentioned production method sex. The results are recorded in Table 2 and Table 3 together.
[0079] Table 2
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[0081] table 3
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[0083] * 1: Compound No.10: Triazine compound
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Embodiment 3-1～3-6
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[0087] With respect to 100 parts by mass of the resin described in the following Table 4 or 5, the ultraviolet absorber described in Table 4 or 5 was blended with 0.2 parts by mass, except that it was produced in the same way as the production method of the protective film of the above-mentioned Example 1. Methods Thin film test pieces were fabricated.
[0088] For the film test piece obtained by the above-mentioned production method, the retention rate (%) of the total light transmittance (%) after 240, 360, and 480 hours was measured with a weathering tester (83°C, no rain, carbon arc light source) , to evaluate the lightfastness. The results are reported together in Tables 4 and 5.
[0089] However, the abbreviations of the used resins in the table are as follows.
[0090] TAC: Triacetyl cellulose resin: Daicel Chemical Industry Co., Ltd. product name LT-35
[0091] PC: polycarbonate resin: manufactured by Mitsubishi Engineering Plastics Co., Ltd., product nam...
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Abstract
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