Tape-form recording medium and manufacturing method thereof
A manufacturing method of a tape-form recoding medium in the present invention is configured with a raw web winding process of winding on a winding core raw web having a support body, a data recoding layer laminated on one side of the support body, and a minute convexity laminated on the other side thereof; a raw web rewinding process of rewinding on other winding cores the raw web wound on the winding core in the raw web winding core; and a heat treatment process of heating the rewound raw web and decreasing a number of a concavity not less than 30 nm in depth formed in the data recording layer in the raw web winding process to not more than 80 pieces/mm 2 .
1 . A manufacturing method of a tape-form recoding medium comprising:
a raw web winding process of winding on a winding core raw web having a support body, a data recoding layer laminated on one side of the support body, and a minute convexity laminated on the other side thereof; a raw web rewinding process of rewinding on other winding cores the raw web wound on the winding core in the raw web winding core; and
a heat treatment process of heating the rewound raw web and decreasing a number of a concavity not less than 30 nm in depth formed in the data recording layer in the raw web winding process to not more than 80 pieces/mm 2 .
2 . The manufacturing method according to claim 1 , wherein a ratio (D 1 /D 2 ) of a diameter D 1 of the other winding cores to a diameter D 2 of a pancake formed by rewinding the raw web on the other winding cores is in a range of an equation (1) below:
0.5 ≦D 1 /D 2<1.0. Equation (1)
3 . The manufacturing method according to claim 1 , wherein a tension T per unit tape width in rewinding the raw web on the other winding cores is in a range of an equation (2) below:
7.7×10 −2 N/mm≦ T≦ 1.55×10 −1 N/mm. Equation (2)
4 . The manufacturing method according to claim 2 , wherein a tension T per unit tape width in rewinding the raw web on the other winding cores is in a range of an equation (2) below:
7.7×10 −2 N/mm≦ T≦ 1.55×10 − N/mm. Equation (2)
5 . The manufacturing method according to claim 1 further comprising a raw web slitting process of slitting the raw web, matching a desired width of the tape-form recoding medium.
6 . The manufacturing method according to claim 2 further comprising a raw web slitting process of slitting the raw web, matching a desired width of the tape-form recoding medium.
7 . The manufacturing method according to claim 3 further comprising a raw web slitting process of slitting the raw web, matching a desired width of the tape-form recoding medium.
8 . The manufacturing method according to claim 4 further comprising a raw web slitting process of slitting the raw web, matching a desired width of the tape-form recoding medium.
9 . The manufacturing method according to claim 1 , wherein in the heat treatment process the raw web is heated for 12 to 48 hours under an environment of a temperature of 50 to 60 degrees Celsius and a humidity of 40 to 60%.
10 . The manufacturing method according to claim 2 , wherein in the heat treatment process the raw web is heated for 12 to 48 hours under an environment of a temperature of 50 to 60 degrees Celsius and a humidity of 40 to 60%.
11 . The manufacturing method according to claim 3 , wherein in the heat treatment process the raw web is heated for 12 to 48 hours under an environment of a temperature of 50 to 60 degrees Celsius and a humidity of 40 to 60%.
12 . The manufacturing method according to claim 4 , wherein in the heat treatment process the raw web is heated for 12 to 48 hours under an environment of a temperature of 50 to 60 degrees Celsius and a humidity of 40 to 60%.
13 . The manufacturing method according to claim 5 , wherein in the heat treatment process the raw web is heated for 12 to 48 hours under an environment of a temperature of 50 to 60 degrees Celsius and a humidity of 40 to 60%.
14 . The manufacturing method according to claim 6 , wherein in the heat treatment process the raw web is heated for 12 to 48 hours under an environment of a temperature of 50 to 60 degrees Celsius and a humidity of 40 to 60%.
15 . The manufacturing method according to claim 7 , wherein in the heat treatment process the raw web is heated for 12 to 48 hours under an environment of a temperature of 50 to 60 degrees Celsius and a humidity of 40 to 60%.
16 . The manufacturing method according to claim 8 , wherein in the heat treatment process the raw web is heated for 12 to 48 hours under an environment of a temperature of 50 to 60 degrees Celsius and a humidity of 40 to 60%.
17 . The tape-form recoding medium manufactured by the manufacturing method of the tape-form recoding medium according to claim 1 .
18 . The tape-form recoding medium manufactured by the manufacturing method of the tape-form recoding medium according to claim 2 .
19 . The tape-form recoding medium manufactured by the manufacturing method of the tape-form recoding medium according to claim 3 .
20 . The tape-form recoding medium manufactured by the manufacturing method of the tape-form recoding medium according to claim 5.