Heat-treating method of a thermoplastic resin film
US5906785A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1996 |
| Grant date | May 25, 1999 |
| Priority date | — |
| Expiry date | Dec 23, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C71/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A thermoplastic resin film is preheated as the temperature T is changed to at a temperature of Tg<T<m.p.-10.degree. C., and absolutely contacted with a belt by being pressed at a linear pressure of 9.8 N/cm-980.0 N/cm (Tg: glass transition temperature of the thermoplastic resin film, m.p.: melting point of the thermoplastic resin film). Next, the thermoplastic resin film is heated as the temperature T is changed to a temperature of m.p.-20.degree. C.<T<m.p.+20.degree. C. while being absolutely contacted with the belt, and successively, the thermoplastic resin film is cooled while being absolutely contacted with the belt, and then the thermoplastic resin film is peeled from the belt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.