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. 12, 2021
Filed:
Jul. 01, 2019
Taiwan Green Point Enterprises Co., Ltd., Taichung, TW;
Chia-Hung Yang, Taichung, TW;
Yu-Pao Huang, Taichung, TW;
Hsing-Fu Yeh, Taichung, TW;
Yao-Tang Ke, Taichung, TW;
Feng-Lin Chen, Taichung, TW;
Yung-Chih Chen, Taichung, TW;
Yi-Chung Su, Taichung, TW;
Taiwan Green Point Enterprises Co., Ltd., Taichung, TW;
Abstract
A method of preparing polyamide (PA) powders includes the steps of: heating a composition including PA granules, a nucleating agent and an organic solvent under normal pressure to Tnot lower than melting point (T) of PA granules and maintaining at Tto dissolve PA granules; cooling the heated composition to Tto nucleate the dissolved PA granules and maintaining at Tto crystallize, where 15° C.≤T−T≤33° C.; cooling the crystallization product to precipitate PA; and washing the precipitated product to remove the organic solvent. The weight ratio of PA granules to the nucleating agent is 100:1, and the weight ratio of PA granules to the organic solvent ranges from 0.11 to saturation solubility of PA granules in the organic solvent.