发明名称 |
Light calcium carbonate, process for producing the same, and printing paper containing the same |
摘要 |
The light calcium carbonate in the form of microparticle aggregate of the present invention has a BET specific surface area not smaller than 10 m2/g and not larger than 25 m2/g, a pore volume of 0.05 cm3/g or larger for pores having a pore diameter of 0 to 1000 Å as determined by the nitrogen adsorption method, and a pore volume ratio of 25% or more for pores having a pore diameter of 250 Å or smaller based on the total pore volume as determined by the nitrogen adsorption method, and shows an oil absorption of 100 cc/100 g or more as determined by using liquid paraffin. By using this light calcium carbonate as a filler of printing paper, superior ink absorbing property and opacity (especially opacity after printing) can be imparted to the printing paper. |
申请公布号 |
US8252413(B2) |
申请公布日期 |
2012.08.28 |
申请号 |
US20070513122 |
申请日期 |
2007.11.28 |
申请人 |
SHIMONO KAZUHISA;TAKANO TATSUO;KAWAZU TORU;OKUTAMA KOGYO CO., LTD. |
发明人 |
SHIMONO KAZUHISA;TAKANO TATSUO;KAWAZU TORU |
分类号 |
B32B5/16 |
主分类号 |
B32B5/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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