Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length
Reexamination Certificate
2004-05-12
2008-12-16
McDowell, Suzanne E. (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Production of continuous or running length
Reexamination Certificate
active
07465420
ABSTRACT:
The method of manufacturing a film of thermotropic liquid crystal polymer includes extruding a thermotropic liquid crystal polymer of a kind in which any one of activation energies Ea1 and Ea2 of a melt viscosity is within the range of 30 to 90 kcal/mol, with the ratio (Ea1/Ea2) of the activation energy Ea1 relative to the activation energy Ea2 being within the range of 1 to 1.7. The activation energies Ea1 and Ea2 are measured by means of a capillary rheometer, including a nozzle of 1 mm in inner diameter and 10 mm in length disposed at an angle of introduction of 90° and a barrel of 9.55 mm in inner diameter, at respective shear rates of 243 seconds−1and 2432 seconds−1under a temperature ranging from the temperature [(Tm−10)° C.], which is lower by 10° C. than the melting point [(Tm)° C.] of the thermotropic liquid crystal polymer, to the temperature [(Tm+20)° C.], which is higher by 20° C. than the melting point [(Tm)° C.] of the thermotropic liquid crystal polymer. The thermotropic liquid crystal polymer also has a melt viscosity of not lower than 400 poises measured under predetermined conditions, and is extruded from a die that is heated to a temperature of predetermined range.
REFERENCES:
patent: 5534209 (1996-07-01), Moriya
patent: 5997765 (1999-12-01), Furuta et al.
patent: 6528164 (2003-03-01), Ohbe et al.
patent: 6656578 (2003-12-01), Ohbe et al.
patent: 2003/0088053 (2003-05-01), Ohbe et al.
patent: 2-3430 (1990-01-01), None
patent: 2000-289107 (2000-10-01), None
patent: 2001-342243 (2001-12-01), None
U.S. Appl. No. 10/843,308, filed May 12, 2004, Yoshikawa et al.
U.S. Appl. No. 10/650,847, filed Aug. 29, 2003, Miyata et al.
U.S. Appl. No. 10/650,680, filed Aug. 29, 2003, Miyata et al.
Practical Handbook of the Plastics Industry, vol. 1/Ding Hao, Editor—Beijing: Chemical Industry Press, 1995, pp. 1288-1989 (Translation).
Sunamoto Tatsuya
Yoshikawa Tadao
Kuraray Co. Ltd.
McDowell Suzanne E.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
LandOfFree
Film forming method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Film forming method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Film forming method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4052162