RICHARD EVAN FREUNDLICH
Medical Practice in Summit, NJ
License number
Pennsylvania MD032605E
Category
Medicine
Type
Medical Physician and Surgeon
Address
Address
2
Summit, NJ 07901
Pennsylvania
Pennsylvania
Personal information
See more information about RICHARD EVAN FREUNDLICH at radaris.comName
Address
Phone
14 Manchester Dr, Westfield, NJ 07090
1530 Locust St #121, Philadelphia, PA 19102
24 Davis Rd, Lakewood, NJ 08701
32 Falcon Ct, Trenton, NJ 08690
508 Ocean Ave, Lakewood, NJ 08701
Professional information
Electrical Grade Extruded Filled Thermoplastic Sheet Material And Process For The Manufacture Thereof
US Patent:
4500603, Feb 19, 1985
Filed:
Feb 2, 1981
Appl. No.:
6/230918
Inventors:
Richard A. Freundlich - Summit NJ
Assignee:
Celanese Corporation - NY
International Classification:
B32B 1704, B32B 508
US Classification:
428409
Abstract:
Disclosed is a novel filled continuous thermoplastic sheet material highly suitable for use in electrical applications, such as in the production of printed circuit boards. This material comprises an extruded sheet of a thermoplastic polymer, preferably poly(1,4-butylene terephthalate), containing from about 5 to 60% by weight of reinforcing filler material such as glass fibers, and having a polymer-rich surface, a gloss value of at least 15, and a maximum roughness of about 150 microinches. Also disclosed is a process and apparatus for the production of this material by extruding a filled thermoplastic polymer into a continuous laminar melt stream, conveying the laminar melt stream to a hot, highly polished surface, and then contacting the resulting melt stream with the hot, highly polished surface under temperature and pressure conditions sufficient to cause the filler material to retreat from the surface of the melt stream and to produce a sheet material having a smooth, glossy, polymer-rich surface thereon.