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:
Mar. 15, 2016
Filed:
Jun. 19, 2012
Taku Ishimaru, Nagoya, JP;
Katsumi Akaike, Nagoya, JP;
Daisuke Kikuno, Nagoya, JP;
Tomoyuki Aoki, Nagoya, JP;
Minoru Noda, Nagoya, JP;
Yasunori Tsuda, Nagoya, JP;
Taku Ishimaru, Nagoya, JP;
Katsumi Akaike, Nagoya, JP;
Daisuke Kikuno, Nagoya, JP;
Tomoyuki Aoki, Nagoya, JP;
Minoru Noda, Nagoya, JP;
Yasunori Tsuda, Nagoya, JP;
Toray Industries, Inc., , JP;
Abstract
A method of producing a polyamide includes (i) polycondensating a polyamide precursor containing a salt made from a dicarboxylic acid and a diamine under pressure in a pre-polymerization tank to obtain a prepolymer, and (ii) highly polymerizing the prepolymer with an extruder, wherein when the prepolymer in a molten state which is obtained in the step (i) is fed, by a pump, to the low-pressure extruder from the pre-polymerization tank through a discharge side pipe disposed downstream of the pump, the prepolymer is fed such that the length L [cm] of the discharge side pipe and the linear velocity of discharge v [cm/s] of the prepolymer by the pump satisfy the relationship expressed by the equation, 0.1 [s]≦L/v<10 [s].
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile