Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Continuous or indefinite length
Patent
1997-03-05
1999-09-28
Vargot, Mathieu D.
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Continuous or indefinite length
264 19, 264216, 264284, 425385, B29D 1100, B29C 4700
Patent
active
059583096
ABSTRACT:
Provided is a method for manufacturing a thermoplastic resin sheet bearing an embossed pattern, which employs a manufacturing apparatus having a first roll having an elastic material coated surface, a mirror-faced metal, endless belt, which is wound around the first roll and a second roll, and a third roll so provided that the metal, endless belt is wrapped partially around the third roll, which contacts the first roll via the metal, endless belt and which has an embossed pattern formed on one surface. According to this method, the thermoplastic resin sheet, partially melted, is fed between the metal, endless belt, which contacts the first roll, and the third roll. The elastic member is elastically deformed by application of a pressing force between the first and the third roll, while face pressure welding the thermoplastic sheet by using the first and the third rolls to transfer the embossed pattern and to cool the thermoplastic resin sheet. A surface temperature for the third roll of from 0.degree. C. to (resin's Tg +20).degree.C. is maintained when the thermoplastic resin sheet is formed of an amorphous resin, and a surface temperature for the third roll of 0.degree. C. to (resin's m.p. -30).degree.C. is maintained when the thermoplastic resin sheet is formed of a crystalline resin. Subsequently, face pressure welding of the thermoplastic resin sheet is performed by using the metal, endless belt relative to the third roll.
REFERENCES:
patent: 4601861 (1986-07-01), Pricone et al.
patent: 5204037 (1993-04-01), Fujii
patent: 5658514 (1997-08-01), Fujii et al.
patent: 5674442 (1997-10-01), Morita
Fujii Atsushi
Funaki Akira
Moriwaki Ryuji
Idemitsu Petrochemical Co. Ltd.
Vargot Mathieu D.
LandOfFree
Method for manufacturing thermoplastic sheets bearing embossed p does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for manufacturing thermoplastic sheets bearing embossed p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for manufacturing thermoplastic sheets bearing embossed p will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-699610