Pressure-sensitive-adhesive-layer-attached polarizing film, and image display device
A pressure-sensitive-adhesive-layer-attached polarizing film is disclosed having an odd shape, and capable of reducing occurrence of a crack in a polarizer and preventing peeling and foaming of a pressure-sensitive adhesive layer and warpage of a polarizing film. This pressure-sensitive-adhesive-layer-attached polarizing film comprises a polarizing film, and a pressure-sensitive adhesive layer on one surface of the polarizing film. The pressure-sensitive-adhesive-layer-attached polarizing film has an odd shape other than a rectangular shape, and when a strain gauge is attached to a surface not having the pressure-sensitive adhesive layer of the polarizing film such that a measurement axis and an absorption axis of the polarizing film intersect at right angles and strain amounts are measured, a difference between a strain amount at −40° C. and a strain amount at 85° C. is 3000με or less, and the creep value of the pressure-sensitive adhesive layer at 85° C. is 15-600 μm inclusive.
1. A pressure-sensitive-adhesive-layer-attached polarizing film comprising:
a polarizing film; and
a pressure-sensitive adhesive layer on one surface of the polarizing film, and having an irregular shape other than a solid rectangular shape, wherein
when a strain gauge is bonded to a surface not having the pressure-sensitive adhesive layer of the polarizing film such that a measurement axis and an absorption axis of the polarizing film intersect at right angles and strain amounts are measured, a difference between a strain amount at −40° C. and a strain amount at 85° C. is 3000με or less, and
a creep value of the pressure-sensitive adhesive layer at 85° C. is 15 μm or more and 200 μm or less.
2. The pressure-sensitive-adhesive-layer-attached polarizing film according to claim 1 , wherein the strain amount at −40° C. is −4000με or more.
3. The pressure-sensitive-adhesive-layer-attached polarizing film according to claim 2 , wherein
the polarizing film has at least a polarizer and a first protective film,
the first protective film is provided between the polarizer and the pressure-sensitive adhesive layer, and
a linear expansion coefficient of the first protective film is 7.0×10 −5 /K or less.
4. The pressure-sensitive-adhesive-layer-attached polarizing film according to claim 3 , wherein the first protective film is formed with a cellulose-based polymer.
5. The pressure-sensitive-adhesive-layer-attached polarizing film according to claim 4 , wherein the pressure-sensitive adhesive layer has a thickness of 2 μm or more and 30 μm or less.
6. The pressure-sensitive-adhesive-layer-attached polarizing film according to claim 3 , wherein the pressure-sensitive adhesive layer has a thickness of 2 μm or more and 30 μm or less.
7. The pressure-sensitive-adhesive-layer-attached polarizing film according to claim 2 , wherein the pressure-sensitive adhesive layer has a thickness of 2 μm or more and 30 μm or less.
8. The pressure-sensitive-adhesive-layer-attached polarizing film according to claim 1 , wherein
the polarizing film has at least a polarizer and a first protective film,
the first protective film is provided between the polarizer and the pressure-sensitive adhesive layer, and
a linear expansion coefficient of the first protective film is 7.0×10 −5 /K or less.
9. The pressure-sensitive-adhesive-layer-attached polarizing film according to claim 8 , wherein the first protective film is formed with a cellulose-based polymer.
10. The pressure-sensitive-adhesive-layer-attached polarizing film according to claim 9 , wherein the pressure-sensitive adhesive layer has a thickness of 2 μm or more and 30 μm or less.
11. The pressure-sensitive-adhesive-layer-attached polarizing film according to claim 8 , wherein the pressure-sensitive adhesive layer has a thickness of 2 μm or more and 30 μm or less.
12. The pressure-sensitive-adhesive-layer-attached polarizing film according to claim 1 , wherein the pressure-sensitive adhesive layer has a thickness of 2 μm or more and 30 μm or less.
13. An image display device having the pressure-sensitive-adhesive-layer-attached polarizing film according to claim 1 .