Title:
WRITING IMPLEMENT
Document Type and Number:
WIPO Patent Application WO/2021/241484
Kind Code:
A1
Abstract:
Provided is a writing implement capable of suppressing ink discoloration caused by the adsorption of a writing implement ink onto a pen tip. This writing implement employs, for example, a writing implement characterized in that: an aqueous ink composition is included which contains a colored particle water dispersion composed of a polymer that has at least a monomer unit derived from a dye having a polymerizable unsaturated group; and a pen tip (excluding a sintered core) is composed of a polyester-based material.
Inventors:
HAGA HISATO (JP)
TAMURA MAKOTO (JP)
TAMURA MAKOTO (JP)
Application Number:
PCT/JP2021/019578
Publication Date:
December 02, 2021
Filing Date:
May 24, 2021
Export Citation:
Assignee:
MITSUBISHI PENCIL CO (JP)
International Classes:
B43K1/00; C09B69/10; B43K8/02; C09B67/46; C09D11/17
Domestic Patent References:
| WO2019117134A1 | 2019-06-20 |
Foreign References:
| JPH0939465A | 1997-02-10 | |||
| JP3144589U | 2008-09-04 | |||
| JP2013144379A | 2013-07-25 | |||
| US5672021A | 1997-09-30 |
Attorney, Agent or Firm:
FUJIMOTO Eisuke et al. (JP)
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