Anti-reflection film, production of anti-reflection film, and multi-layer film producing apparatus
First Claim
1. An anti-reflection film producing method comprising:
- a coating applying step of applying coating solution to a long support, said coating solution containing a polymerizable compound, and at least first and second polymerization initiators which absorb actinic radiation of wavelength ranges different from one another and generate a radical in response thereto;
an ultraviolet radiation curing step of, after drying a coating layer formed by said coating applying step to a reference dry state, applying ultraviolet radiation to said coating layer, to obtain an anti-reflection layer by ultraviolet curing of said polymerizable compound;
wherein said ultraviolet radiation curing step includes first processing and second processing subsequent to said first processing;
in said first processing, two or more optical filters having wavelength selectivity are arranged in a web width direction of said long support, for adjusting a deviation of an amount of ultraviolet radiation to said coating layer in said web width direction into a range equal to or more than 1% and equal to or less than 10% of an average amount, and in said first processing, said radical is generated from said first polymerization initiator, wherein in said second processing, said radical is generated from said second polymerization initiator.
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Accused Products
Abstract
A coater overlays actinic radiation curable composition on a long support in a liquid phase to constitute a coating layer. The actinic radiation curable composition includes polymerizable compound, and a first polymerization initiator for reacting upon ultraviolet radiation of a first wavelength range, and for rendering the coating layer semi-cured in first-stage curing. A second polymerization initiator reacts upon ultraviolet radiation of a broad wavelength range covering the first wavelength range, and completely cures the coating layer in second-stage curing after the first-stage curing, to obtain an anti-reflection layer. For the first-stage curing, optical filters are combined with an ultraviolet radiation source for the broad wavelength range, and cause transmission of radiation of the first wavelength range for reaction only upon the first polymerization initiator. In one embodiment, the optical filters are arranged in a web width direction of the long support.
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Citations
16 Claims
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1. An anti-reflection film producing method comprising:
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a coating applying step of applying coating solution to a long support, said coating solution containing a polymerizable compound, and at least first and second polymerization initiators which absorb actinic radiation of wavelength ranges different from one another and generate a radical in response thereto; an ultraviolet radiation curing step of, after drying a coating layer formed by said coating applying step to a reference dry state, applying ultraviolet radiation to said coating layer, to obtain an anti-reflection layer by ultraviolet curing of said polymerizable compound; wherein said ultraviolet radiation curing step includes first processing and second processing subsequent to said first processing; in said first processing, two or more optical filters having wavelength selectivity are arranged in a web width direction of said long support, for adjusting a deviation of an amount of ultraviolet radiation to said coating layer in said web width direction into a range equal to or more than 1% and equal to or less than 10% of an average amount, and in said first processing, said radical is generated from said first polymerization initiator, wherein in said second processing, said radical is generated from said second polymerization initiator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification