The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 1985
Filed:
Aug. 25, 1982
Deutsche Solvay Werke GmbH, Solingen, DE;
Abstract
The application discloses a process for the preparation of plates, films, sheets, strips, rods, molded parts, objects or profiles of high mechanical strength, from thermoplastic synthetic resinous materials, whereby the thermoplastic material is initially heated in an extruder or a similar installation equipped with a mixing and heating device to at least its melting or softening point, the emerging extruded mass subjected during or after a cooling process in a forming device, pressure drawing device or other accessory installation to at least one pressure stretching at a pressure from about 90 .sup.N /mm.sup.2 to 1500 .sup.N /mm.sup.2, preferably from about 155 .sup.N /mm.sup.2 to 1000 .sup.N /mm.sup.2, and/or to at least one pulsating pressure or shearing pressure treatment. Preferably, the pressure stretched or shearing pressure treated synthetic plastic material is subjected subsequently to at least one further tempering, preferably cooling and/or processing step. To carry out the process, an apparatus is used having at least one accessory device including one or more pressure rams and at least one nozzle, slot or a similar cross-section restriction in the form of an outlet orifice.