| abstract |
A polymer substrate with a hard coat layer having high environmental resistance and high abrasion resistance is realized. There is provided a polymer substrate to which a hard coat layer having a polymer substrate 60 of 1 to 20 mm in thickness and hard coat layers 70 and 80 on its surface is attached. Here, in the polymer substrate to which the hard coat layer is adhered, the hard coat layers 70 and 80 are laminated on the surface of the polymer substrate, and the hydrolytic condensate of the organosilicon compound is contained as a main component, Cured layer 70 directly contacting the undercoat layer on the opposite side of the polymer substrate and being formed by the PE-CVD method of the organosilicon compound and having the following formulas (a) to (c): (A) the film thickness of the silicon oxide layer is in the range of 3.5 to 9.0 mu m, (b) the nanoindentation at the maximum load of 1 mN, Point bending test of a polymer substrate with a hard coat layer which gives a push-in displacement to concave the surface on which the silicon oxide layer is laminated, and (c) the maximum indentation depth of the surface of the silicon oxide layer by measurement is not more than 150 nm. , One of the silicon oxide layers It is less than the value of the compressibility K 0.975. |