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US 8,999,464 B2Granted
Optical film and its production method, polarizer and liquid crystal display device
AssigneeFUJIFILM Corporation
InventorsHajime Nakayama, Katsumi Sasata
Life of this patent
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Abstract
An optical film having a core layer containing a (meth)acrylic resin having a lactone ring structure, and an outer layer containing a cellulose acetate with a thickness of from more than 3 μm to 20 μm on at least one side of the core layer is excellent in nonbrittleness and adhesiveness to a polarizing element.
Claims12
An optical film having three layers consisting of:
- a core layer containing a (meth)acrylic resin having a lactone ring structure and having a thickness of from 10 to 100 μm,
- wherein the lactone ring structure is represented by the following formula (1):
- wherein R1, R2 and R3 each independently represent a hydrogen atom, or an organic residue having from 1 to 20 carbon atoms;
- and
- two outer layers wherein each one outer layer is formed on both sides of the core layer, the outer layer containing a cellulose acetate and having a thickness of from more than 3 μm to 20 μm,
- wherein the cellulose acetate resin satisfies the following condition:
- 2.5≦TA2≦3.0
- wherein TA2 means the degree of substitution with acyl group having 2 carbon atoms, and
- wherein the proportion of the total thickness of the outer layers to the total thickness of the film is from 2 to 20%.
6 more elements
A polarizer having a polarizing element and an optical film, wherein the optical film has three layers consisting of:
- a core layer containing a (meth)acrylic resin having a lactone ring structure and having a thickness of from 10 to 100 μm,
- wherein the lactone ring structure is represented by the following formula (1):
- wherein R1, R2 and R3 each independently represent a hydrogen atom, or an organic residue having from 1 to 20 carbon atoms;
- and
- two outer layers wherein each one outer layer is formed on both sides of the core layer, the outer layer containing a cellulose acetate and having a thickness of from more than 3 μm to 20 μm,
- wherein the cellulose acetate resin satisfies the following condition:
- 2.5≦TA2≦3.0
- wherein TA2 means the degree of substitution with acyl group having 2 carbon atoms, and
- wherein the proportion of the total thickness of the outer layers to the total thickness of the film is from 2 to 20%.
6 more elements
A liquid crystal display device having an optical film having three layers consisting of:
- a core layer containing a (meth)acrylic resin having a lactone ring structure and having a thickness of from 10 to 100 μm,
- wherein the lactone ring structure is represented by the following formula (1):
- wherein R1, R2 and R3 each independently represent a hydrogen atom, or an organic residue having from 1 to 20 carbon atoms;
- and
- two outer layers wherein each one outer layer is formed on both sides of the core layer, the outer layer containing a cellulose acetate and having a thickness of from more than 3 μm to 20 μm on at least one side of the core layer,
- wherein the cellulose acetate resin satisfies the following condition:
- 2.5≦TA2≦3.0
- wherein TA2 means the degree of substitution with acyl group having 2 carbon atoms, and
- wherein the proportion of the total thickness of the outer layers to the total thickness of the film is from 2 to 20%.
6 more elements
Dependencies are inferred from the claim text.