Patent ID: 11866564
Assignee: TEIJIN LIMITED
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 8:
9. The polymer substrate with a hard coat layer according to claim 1, wherein the silicon oxide layer has a thickness of 2.5 to 9 μm, and satisfies all of the following requirements (a2) to (c2) at a position 2.0 μm from the interface between the cured underlayer and the silicon oxide layer in the thickness direction:
(a2) when the chemical composition is represented by SiOxCyHz, x is in the range of 1.81 to 1.90, y is in the range of 0.15 to 0.32, and z is in the range of 0.45 to 0.90,
(b2) the ratio of infrared absorbance at a wave number of 930 cm−1 to that at a wave number of 1020 cm−1 (α930/α1020) is in the range of 0.21 to 0.36, and
(c2) the ratio of infrared absorbance at a wave number of 1280 cm−1 to that at a wave number of 1020 cm−1 (α1280/α1020) is in the range of 0.010 to 0.040.