Method for manufacturing magnetic recording medium

Abstract

A method for manufacturing a magnetic recording medium is provided which has high recording density and which is less likely to cause problems of a magnetic tape such as inappropriate contact with a head, unstable running, and damage. A back-coat layer containing plate-like inorganic pigment (plate-like inorganic pigment-containing layer) is formed over a non-magnetic support to produce an intermediate product having the support and the back-coat layer. Then, the intermediate product is subjected to calendering between at least one pair of metal rolls.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side cross-sectional view schematically illustrating a step of forming a back-coat layer of a magnetic tape according to one exemplary embodiment of the present invention;

FIG. 2 is a side cross-sectional view schematically illustrating a step of calendering the magnetic tape; and

FIG. 3 is a flowchart showing the outline of a method for manufacturing the magnetic tape.

Claims

1. A method for manufacturing a magnetic recording medium, comprising: a plate-like inorganic pigment-containing layer forming step of forming a plate-like inorganic pigment-containing layer containing plate-like inorganic pigment over a non-magnetic support to produce an intermediate product having the support and the plate-like inorganic pigment-containing layer; anda calendaring step of calendering the intermediate product between at least one pair of metal rolls, wherein the steps are carried out sequentially in this order.

2. The method for manufacturing a magnetic recording medium according to claim 1, wherein the plate-like inorganic pigment-containing layer contains plate-like iron oxide serving as the plate-like inorganic pigment.

3. The method for manufacturing a magnetic recording medium according to claim 1, wherein in the plate-like inorganic pigment-containing layer forming step, a back-coat layer is formed to serve as the plate-like inorganic pigment-containing layer.

4. The method for manufacturing a magnetic recording medium according to claim 2, wherein in the plate-like inorganic pigment-containing layer forming step, a back-coat layer is formed to serve as the plate-like inorganic pigment-containing layer.

5. The method for manufacturing a magnetic recording medium according to claim 3, wherein the back-coat layer contains the plate-like inorganic pigment and carbon.

6. The method for manufacturing a magnetic recording medium according to claim 4, wherein the back-coat layer contains the plate-like inorganic pigment and carbon.