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:
Jan. 10, 2017
Filed:
Mar. 05, 2014
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Takafumi Oda, Kanagawa, JP;
Nobuhide Tsunaka, Kanagawa, JP;
Jun Mitadera, Kanagawa, JP;
Tomonori Kato, Kanagawa, JP;
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Abstract
A polyamide resin is produced by polycondensing a polyamide oligomer having a relative viscosity of from 1.1 to 1.3 and a water content of 3% by weight or less by melt-kneading using an intermeshed co-rotation twin screw extruder having at least one or more open vents OVand OVand at least one or more vacuum vents VVand VV. A pressure-decreasing element Y for increasing the resin filling rate is provided at a position nearer to the supply section side than positions at which the vacuum vents VVand VVare provided, and an area of 30% or less of the total screw length is a vacuum area having a pressure of 300 Torr or less.