Magnetic recording medium
View Patent ↗A magnetic recording medium comprising: a magnetic layer; a first radiation curable resin layer; a non-magnetic support having an intrinsic viscosity of from 0.47 to 0.51 dL/g; and a second radiation curable resin layer, in this order, wherein the first radiation curable resin layer contains a filler, and the second radiation curable resin layer contains a filler.
1. A magnetic recording medium comprising:
a magnetic layer;
a first radiation curable resin layer;
a non-magnetic support having an intrinsic viscosity of from 0.47 to 0.51 dL/g;
a second radiation curable resin layer; and
a back layer, in this order,
wherein the back layer has a surface roughness of from 2 to 5 nm, the magnetic layer has a surface roughness of from 1 to 4 nm, the first radiation curable resin layer contains a filler, and the second radiation curable resin layer contains a filler.
2. The magnetic recording medium according to claim 1 , wherein at least one of the first radiation curable resin layer and the second radiation curable resin layer further contains a binder.
3. The magnetic recording medium according to claim 2 , wherein at least one of the binder contained in the first radiation curable resin layer and the binder contained in the second radiation curable resin layer has a glass transition temperature of from 0 to 120° C.
4. The magnetic recording medium according to claim 1 , wherein at least one of the filler contained in the first radiation curable resin layer and the filler contained in the second radiation curable resin layer has a thickness of from 0.5 to 5 nm.
5. The magnetic recording medium according to claim 1 , wherein the first radiation curable resin layer further contains at least one of a polyamide resin, a polyamideimide resin, a polyester resin, a polyurethane resin, a vinyl chloride based resin and an acrylic resin, and the second radiation curable resin layer further contains at least one of a polyamide resin, a polyamideimide resin, a polyester resin, a polyurethane resin, a vinyl chloride based resin and an acrylic resin.
6. The magnetic recording medium according to claim 1 , wherein the non-magnetic support comprises polyethylene terephthalate or polyethylene naphthalate.
7. The magnetic recording medium according to claim 1 , wherein the non-magnetic support contains 3.0% by weight of a particle having a mean particle size of from 10 nm to 2.0 μm.
8. The magnetic recording medium according to claim 1 , wherein at least one of the first radiation curable resin layer and the second radiation curable resin layer further contains a radiation curable compound.
9. The magnetic recording medium according to claim 8 , wherein at least one of the first radiation curable resin layer and the second radiation curable resin layer further contains a polymerization initiator.
10. The magnetic recording medium according to claim 1 , wherein at least one of the first radiation curable resin layer and the second radiation curable resin layer has a thickness of from 0.3 to 3.0 μm.
11. The magnetic recording medium according to claim 1 , wherein at least one of the first radiation curable resin layer and the second radiation curable resin layer has a thickness of from 0.35 to 2.0 μm.
12. The magnetic recording medium according to claim 1 , wherein the magnetic layer contains ferromagnetic powder.
13. The magnetic recording medium according to claim 12 , wherein the ferromagnetic powder is ferromagnetic hexagonal ferrite powder.
14. The magnetic recording medium according to claim 1 , wherein at least one of the first radiation curable resin layer and the second radiation curable resin layer contains a conductive powder or an ionic surfactant.