Toner, two-component type developer, heat fixing method, image forming method and apparatus unit
US6300024A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2000 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Jun 28, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/087
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner is principally constituted by a binder resin, a colorant and a wax. The toner has a maximum heat-absorption peak of 60-135.degree. C. as measured by differential scanning calorimetry (DSC). The toner further has a viscoelastic characteristic measured at an angular frequency of the toner of 6.28 rad/sec including: a temperature giving a loss molecules G" of 3.times.10.sup.4 Pa of 90-115.degree. C., a temperature giving a loss modulus G" of 2.times.10.sup.4 Pa of 95-120.degree. C., a temperature giving a loss modulus G" of 1.times.10.sup.4 Pa of 105-135.degree. C., a tan .delta. (loss modulus G"/storage modulus G') when G"=1.times.10.sup.4 -3.times.10.sup.4 Pa of 0.6-2.0, a storage modulus at 170.degree. C. (G' (170.degree. C.)) of 1.times.10.sup.2 -1.times.10.sup.4 Pa, a loss modulus at 170.degree. C. (G" (170.degree. C.)) of 1.times.10.sup.2 -1.times.10.sup.4 Pa, and a ratio of a tan .delta. at 170.degree. C. (tan .delta..sub.170) to a tan .delta. at 150.degree. C. (tan .delta..sub.150) (tan .delta..sub.170 /tan .delta..sub.150) of 1.05-1.6. The toner contains a tetrahydrofuran (THF)-soluble content exhibiting a molecular weight distribution according to gel permeation chro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.