Hot roll glosser method with glossing temperature below free air glass transistion temperature of resin utilized
US4978560A · kind A · utility
16Cited by
11References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1990 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Feb 22, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2227/325
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A hot roll glosser and method for the transparentising of resin-coated microencapsulated media includes a pair of heated pressing rolls, in which the roll which comes into contact with a resin surface is formed with an ultra-smooth silicone surface of low furface energy, and the glossing temperature of the rolls at the pressing nip is maintained below the glass transition temperature of the resin. Take-off rolls are disclosed for maintaining a tension in the web material exiting the nip to maintain a negative exit angle with respect to the silicone roll and to prevent adhesion and sticking to the roll.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.