Claims
- 1. A method for manufacturing cast-coated paper, which comprises applying at least one undercoating of an aqueous coating composition containing coating pigments and a binder to at least one side of the base paper to form at least one undercoating layer, at least one of the undercoatings being applied by means of a blade coater and the application rate of the undercoating being 5 to 25 g/m.sup.2 on dry basis per side; then applying onto the undercoating layer an overcoating of an aqueous coating composition containing coating pigments and a polymer latex having a glass transition temperature of 38.degree. C. or higher; drying the overcoating at a temperature below the glass transition temperature of the polymer latex; and subjecting it to a mirror finishing treatment at a temperature higher than said glass transition temperature to obtain a cast-coated paper having a specular gloss greater than 15% at an incident angle of 20.degree..
- 2. A method according to claim 1, wherein the coating pigments in the aqueous coating composition for overcoating contain 12 to 35 parts by weight of a plastic pigment per 100 parts by weight of the total pigments.
- 3. A method according to claim 1, wherein the application rate of the undercoating is 8 to 20 g/m.sup.2 on dry basis per side.
- 4. A method according to claim 2, wherein the plastic pigment has a particle diameter of 2.mu. or less.
- 5. A method according to claim 1, wherein the polymer latex having a glass transition temperature of 38.degree. C. or higher is an emulsion of polyvinyl acetate, styrene-isoprene copolymer, styrene-butadiene copolymer an acrylic polymer or a mixture thereof.
- 6. A method according to claim 1, wherein the application rate of the overcoating is 10 to 40 g/m.sup.2 on dry basis per side.
- 7. A method according to claim 1, wherein the mirror finishing treatment is carried out at a temperature of 100.degree. to 200.degree. C.
- 8. A method according to claim 1, wherein the mirror finishing treatment is carried out by means of a heated calender under a linear pressure of 20 kg/cm or more.
- 9. A method according to claim 1, wherein the mirror finishing treatment is carried out by means of a heated calender at a temperature of 120.degree.-180.degree. C. and under a linear pressure of 40 to 190 Kg/cm.
- 10. A cast-coated paper manufactured by the method according to claim 1.
- 11. A cast-coated paper manufactured by the method according to claim 2.
Priority Claims (2)
Number |
Date |
Country |
Kind |
53-59594 |
May 1978 |
JPX |
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53-62989 |
May 1978 |
JPX |
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Parent Case Info
This is a continuation, of application Ser. No. 40,154 filed May 17, 1979, now U.S. Pat. No. 4,265,969, patented May 5, 1981.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3583881 |
Kennedy |
Jun 1971 |
|
3873345 |
Ureeland |
Mar 1978 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
40154 |
May 1979 |
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