Einsla Brian R.,Ginzburg Valeriy V.,Li Lanfang,Roper, III John A.,Smith Rebecca,Yang Jian
申请号：
US201615366102
公开号：
US9932487(B2)
申请日:
2016.12.01
申请国别(地区):
美国
年份:
2018
代理人:
Willis Reid S.
摘要：
The present invention relates to a thermosensitive recording material comprising paper, an undercoat layer disposed on the paper, and a thermosensitive recording layer disposed on the undercoat layer, wherein the undercoat layer comprises a binder and first and second hollow sphere polymer particles, wherein the first hollow sphere polymer particles have a diameter in the range of from 1.2 μm to 1.8 μm; the second hollow sphere polymer particles have a diameter in the range of from 0.25 μm to 1.0 μm; the number ratio of the second to the first hollow sphere polymer particles is in the range of from 1:1 to 20:1; the diameter of the second hollow sphere polymer particles is in the range of from 15 to 65% of the diameter of the first hollow sphere polymer particles; the dry bulk density of the first hollow sphere polymer particles is in the range of 0.25 to 0.5 g/mL; and the dry bulk density of the second hollow sphere polymer particles is in the range of 0.30 to 0.90 g/mL.
