JP2014078152A5 - - Google Patents

Claims (9)

The base film (A) having a refractive index (na) of 1.61-1.70, and the refractive index (nb) in order from the base film (A) side to at least one surface of the base film (A) ) 1.61 to 1.75 resin layer (B), refractive index (nc) hard coat layer (C) 1.61 to 1.80, and refractive index (nd) 1.50. And a low refractive index layer (D) having a thickness of 5 to 60 nm, and the relationship between the refractive index (na), the refractive index (nb) and the refractive index (nc) is represented by the following formulas 1 to 3. A base film for a transparent conductive film for a touch panel, which satisfies all of the requirements.
−0.02 ≦ (nb−na) ≦ 0.05 Formula 1
−0.02 ≦ (nc−nb) ≦ 0.05 Formula 2
| Nb− {na + (nc−na) / 2)} | ≦ 0.02 Expression 3   The base film of the transparent conductive film for touchscreens of Claim 1 whose thickness of the said resin layer (B) is 5 nm or more and less than 300 nm.   The base film of the transparent conductive film for touchscreens of Claim 1 or 2 whose thickness of the said hard-coat layer (C) is 200 nm or more and less than 5 micrometers. The base film of the transparent conductive film for touchscreens in any one of Claims 1-3 whose refractive index (nd) of the said low-refractive-index layer (D) is 1.25 or more and 1.50 or less . The base film of the transparent conductive film for touchscreens in any one of Claims 1-4 whose said base film (A) is a polyethylene terephthalate film. In order from the base film (A) side on one surface of the base film (A), the resin layer (B), the hard coat layer (C), and the low refractive index layer (D) are provided. The refractive index (nf) is 1 on the other surface of the material film (A) through the resin layer (E) having a refractive index (ne) of 1.55 to 1.60 and a thickness of 50 to 200 nm. .48～1.54 a and and thickness has the hard coat layer is 200nm or more (F), the base film of the transparent conductive film for a touch panel according to any one of claims 1-5. The base film of the transparent conductive film for touchscreens of Claim 6 in which the said hard-coat layer (F) contains particle | grains with an average particle diameter of 500 nm or less. A transparent conductive film having a (G), a transparent conductive film for a touch panel on the low refractive index layer (D) of the base film of the transparent conductive film for a touch panel according to any of claims 1-7. The transparent conductive film for touchscreens of Claim 8 in which the said transparent conductive film (G) is patterned.