Heat transfer medium
US4840837A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1988 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Jul 1, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A heat transfer medium composed of a base material having thereon in order outwardly from the base material; PA0 (a) a colorless or light color heat-fusible transfer layer (A) containing from about 55 to 95 wt % of a wax and from about 5 to 45 wt % of a thermoplastic resin compatible with the wax, based on the whole amount of layer (A); and PA0 (b) a heat-softenable ink layer (B) containing from about 50 to 90 wt % of a thermoplastic resin incompatible with the wax in the layer (A) and having adhesion upon heating, from about 3 to 30 wt % of a heat-fusible lubricant, and a coloring material, based on the whole amount of layer (B); PA0 the viscosity of layer (A) being from about 100 c.p. to 1,000 c.p. at a temperature 20.degree. C. higher than the melting point of layer (A) shown by a differential scanning calorimeter. The heat transfer medium provides transferred images excellent in rubbing resistance and distinctness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.