Aqueous ink composition for ball-point pen
a technology of aqueous ink and ballpoint pen, which is applied in the direction of inks, pharmaceutical delivery mechanisms, coatings, etc., can solve the problems of long stirring, impaired preservation stability, and inability to write well
Inactive Publication Date: 2001-09-27
KOTOBUKI & CO LTD
View PDF0 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, since xanthane gum is an ionic polysaccharide, when a large amount of xanthane gum is used, it reacts with an ionic component in the ink, preservation stability is impaired, and phenomena such as ink shortage, dripping, or dripping-down occur at an ordinary (e.g., operating) temperature for a half year to one year, resulting in writing failure.
However, because of non-ionic properties of polysaccharide, when the non-ionic polysaccharide is added, lengthy stirring must be performed to disperse the non-ionic polysaccharide.
In addition, even after the ink has been prepared, when microscopic observation is performed to confirm the dispersion state of a pigment, there have been observed blocks of any components failing to disperse.
This problem leads to writing failures.
%, it reacts with an ionic polysaccharide, and the ink preservation stability is impaired over time.
%, supernatant liquid is produced, which impairs writing performance.
Further, if only sodium alginate is used, without combining xanthane gum, thixotropy properties cannot be obtained.
%, thixotropy properties cannot be obtained.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
show good cap-off property because they contain comparatively more ethylene glycol (not less than 11 wt. %) and less water than the other Examples and the Comparative Examples. Examples 1 11 were filled with an ink tank of ball-point pens and were tested to determine how long the pens can last with the cap removed from the pen. Examples 1 to 3 indicated that the average length of time the pens lasted was 14 days, while Examples 4 to 11 indicated that the average length of time the pens lasted was 21 days. Good cap-off property can be obtained in Examples 4 to 11.
[0033] Generally, when the amount of water-soluble solvent, except water, is increased, ink on a paper dries more slowly and tends to transfer easily to a stacked sheet. However, when a portion of water is replaced with ethylene glycol, the ink permeates paper rapidly and tends to be prevented from transferring to other sheets. When water is decreased and ethylene glycol is increased, this transferring problem can be elimina...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| length of time | aaaaa | aaaaa |
| length of time | aaaaa | aaaaa |
| water-soluble | aaaaa | aaaaa |
Login to View More
Abstract
An aqueous ink for a ball-point pen which is stable over time and has high pigment dispersion stability, includes a pigment, a water-soluble organic solvent, water, xanthane gum of about 0.01 to about 0.2 wt. % and a sodium alginate of about 0.2 to about 0.6 wt. % of a total amount of the ink.
Description
[0001] 1. Field of the Invention[0002] The present invention relates to an aqueous ink composition for a ball-point pen.[0003] 2. Description of the Related Art[0004] Conventionally, an aqueous ink for a ball-point pen has been disclosed in Japanese Patent Laid-Open No. 59-74175 or Japanese Patent Laid-Open No. 59-138281.[0005] The aqueous ink disclosed in Japanese Patent Laid-Open No. 59-74175 contains xanthane gum of between 0.20 to 0.45 wt. %, and the aqueous ink disclosed in Japanese Patent Laid-Open No. 59-138281 contains xanthane gum of between 0.20 to 0.45 wt. % and a permeable drying agent of between 0.5 to 10.0 wt. %, for providing pseudo plasticoviscosity.[0006] However, since xanthane gum is an ionic polysaccharide, when a large amount of xanthane gum is used, it reacts with an ionic component in the ink, preservation stability is impaired, and phenomena such as ink shortage, dripping, or dripping-down occur at an ordinary (e.g., operating) temperature for a half year to ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(United States)
IPC IPC(8): C09D11/18C09D105/00C09D105/04
CPCC09D11/18C09D105/00C09D105/04C08L2666/02
Inventor HATTORI, KATSUYANAKAMURA, AKIOMORISHITA, MIKIO
Owner KOTOBUKI & CO LTD