Both-side coated paper comprising kaolin for usE of printing
US5853870A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1997 |
| Grant date | Dec 29, 1998 |
| Priority date | — |
| Expiry date | Jun 24, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/277
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The coated paper provided by this invention is a high-quality both-side coated paper for use of printing which is finished by a high-temperature calender above 100.degree. C. and excellent in gloss, print gloss, smoothness, ink receptivity, and stiffness. The both-side coated paper for use of printing according to this invention has the characteristics that after the finish, the paper density is 1.15.about.1.35 g/cm.sup.3, the gloss of coated paper surface is higher than 75%, the smoothness is lower than 20 mmHg, and further the mean value L of Clark free protruding lengths in the machine and cross directions measured pursuant to JIS P8143 A can satisfy the following equation (1) below: EQU L>1.28X+45 (1), where PA1 L=Mean value of Clark free protruding lengths in the machine and cross directions (mm), and PA1 X=Product basis weight (g/m.sup.2), and PA0 that the outermost coating layer on both sides of said coated paper contains the kaolin as a pigment whose average particle diameter is 0.5.about.1.0 .mu.m, and content ratio is 50-80 wt % for the particles smaller than 1 .mu.m in diameter and 5% or less than 5% for the particles larger than 3 .mu.m in diameter, in an amount of 40.a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.