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:
Dec. 30, 2014
Filed:
Mar. 13, 2012
Mitsuo Maeda, Tsukuba, JP;
Yasuo Matsumi, Tsukuba, JP;
Mitsuo Maeda, Tsukuba, JP;
Yasuo Matsumi, Tsukuba, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
A method of producing a liquid crystal polyester composition, the twin-screw extruder including a cylinder having a supply port for supplying the liquid crystal polyester, a first addition port for adding the filler other than fibrous fillers and a second addition port for adding a fibrous filler which are provided downstream of the supply port, and a screw provided with kneading portions on the upstream side and downstream side of the first addition port, a resin temperature (T) of the liquid crystal polyester after kneading in the nearest upstream kneading portion satisfying formula (1), and a resin temperature (T) of the liquid crystal polyester after kneading in the nearest downstream kneading portion satisfying formula (2):FT−100(° C.)≦1≦FT+20(° C.)  (1)FT−100(° C.)≦2≦FT+30(° C.)  (2)wherein FT represents the flow starting temperature of the liquid crystal polyester.