US4317849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing high-gloss coated paper
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1980-10-31
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Granted: 1982-03-02
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Expires: 2000-10-31
Abstract
Abstract A high-gloss coated paper can be produced by coating a paper or a prime-coated paper with an aqueous coating solution comprising a synthetic polymer latex (A) having a glass transition temperature of at least 38 DEG C. and a synthetic polymer latex (B) having a glass transition temperature of 5 DEG to 25 DEG C. in a weight ratio of 1:0.1 to 1:1 in terms of solid content, drying the coated paper, and then bringing the coated surface into contact with a hot calender under pressure at a temperature not lower than the glass transition temperature of the synthetic polymer latex (A), thereby forming a mirror-finishing on the surface of the coated paper.
Inventors
- 👤 Toshimasa Ogura
- 👤 Masafumi Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:43
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/58
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
A process for producing a high-gloss coated paper by coating a paper or a prime-coated paper with an aqueous coating solution comprising a synthetic polymer latex (A) having a glass transition temperature of at least 38° C., a synthetic polymer latex (B) having a glass transition temperature of 5° to 25° C., and a pigment for coated papers, drying the coated paper, and then bringing the coated surface into contact with a hot calender under pressure at a temperature not lower than the glass transition temperature of the synthetic polymer latex (A), thereby mirror-finishing the coated paper, characterized in that the weight ratio (as solids) of the synthetic polymer latex (A) to the synthetic polymer latex (B) is 1:0.2-1:0.67.
Claim 2
Dependent Claim
119 words
A process for producing a high-gloss coated paper by coating a paper or a prime-coated paper with an aqueous coating solution comprising a synthetic polymer latex (A) having a glass transition temperature of at least 38° C., a synthetic polymer latex (B) having a glass transition temperature of 5° to 25° C., and a pigment for coated papers, drying the coated paper, and then bringing the coated surface into contact with a hot calender under pressure at a temperature not lower than the glass transition temperature of the synthetic polymer latex (A), thereby mirror-finishing the coated paper, characterized in that the weight ratio (as solids) of the synthetic polymer latex (A) to the synthetic polymer latex (B) is 1:0.2-1:0.67.
Claim 3
Dependent Claim
23 words
A process according to claim 1, wherein the Cobb size degree of the paper or the prime-coated paper is 0.4-10 g/m 2 .
Claim 4
Dependent Claim
23 words
A process according to claim 2, wherein the Cobb size degree of the paper or the prime-coated paper is 2-7 g/m 2 .
Claim 5
Dependent Claim
67 words
A process according to claim 1 or 2, wherein the coated paper is passed through the nip of the rolls under the conditions that the linear pressure is 1-50 kg/cm and the paper surface temperature is lower than the glass transition temperature of the synthetic polymer latex (A), immediately before mirror-finishing the coated paper by bringing the coated surface into contact with a hot calender under pressure.
Claim 6
Dependent Claim
13 words
A process according to claim 4, wherein the linear pressure is 10-40 kg/cm.
Claim 7
Dependent Claim
14 words
A process according to claim 1, wherein the hot calender is a gloss calender.
References Cited (Backward Citations)
US3873345A
Cited
US4241143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |