Method and apparatus for producing magnetic recording medium having a low heat shrinkage factor
AssigneeFuji Photo Film Co., Ltd.
InventorsShinsuke Takahashi, Toshio Miyashiro
Life of this patent
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Abstract
In a method for producing a magnetic recording medium, at least one magnetic layer is formed on a nonmagnetic support by coating. After all coating processes are completed, heat treatment is performed by heat-treating the support, which is undergone all the coating processes, at 95 to 140° C. for 1.0 to 10.0 seconds with continuously applying tension of from 1.0 to 4.0 kg/m to the support. Then, calendering process is performed at a temperature lower than the temperature of the heat treatment.
Claims12
A method for producing a magnetic recording medium, comprising the steps of:
- forming at least one magnetic layer on a nonmagnetic support by coating;
- performing heat treatment by heat-treating said coated support at a temperature of 95 to 140° C. for 1.0 to 10.0 seconds while continuously applying tension of from 1.0 to 4.0 kg/m to said support, and then performing a calendering process at a calendering temperature lower than the temperature of said heat treatment, wherein the tension is applied at different values.
A method for producing a magnetic recording medium, comprising the steps of:
- forming a magnetic layer on a nonmagnetic support to form a web of a magnetic recording medium;
- and heat-treating the web;
- wherein the heat-treating is carried out at a temperature from 120° C., to 220° C. while tension is applied to the web, the tension being within the range of from more than 0 kg/mg to 3.0 kg/m, wherein the tension is applied at different values, and
- calendering at a calendering temperature lower than the temperature of said heat-treating.
Dependencies are inferred from the claim text.