Polyamide material used for selective laser sintering and preparation method of same

Abstract

A polyamide material used for selective laser sintering and a preparation method of same. The polyamide material includes short-carbon chain nylon salt, and first and second long-carbon chain nylon salts in different types, wherein the short-carbon chain nylon salt, the first and the second long-carbon chain nylon salts are subjected to copolymerization to produce the polyamide material used for selective laser sintering. In the method, the polyamide material is prepared through copolymerization to the short-carbon chain nylon salt, the first and the second long-carbon chain nylon salts, namely, the copolymerized nylon is prepared through the copolymerization of the three nylon salts, so that a high-molecular chain of the polyamide material has low symmetry and regularity and furthermore, the copolymerized nylon is poor in crystallizability and thermostability and is lower in required energy during fusion, so that the polyamide material can be used for the selective laser sintering even work temperature is low, and lower demand on sintering equipment is achieved. In addition, the polyamide material is low in cost and can be widely applied to industrial production.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a polyamide material for selective laser sintering and a preparation method thereof. Background technique [0002] 3D printing technology is a general term for additive manufacturing technology. It is an advanced manufacturing technology with distinctive features such as digital manufacturing, high flexibility and adaptability, direct CAD model drive, fast speed, and rich and diverse material types. Establish a digital description model based on the combination information of structure, structure and selected materials, and then output this information to the computer-controlled electromechanical integrated manufacturing system for point-by-point, line-by-line, and surface-by-surface three-dimensional stacking to produce three-dimensional entities. Compared with the traditional subtractive manufacturing processing technology, the additive manufacturing ...

AI Technical Summary

Problems solved by technology

When using selective laser sintering to prepare workpieces, there is often porosity in the sintered parts because the laser does not completely melt the powder particles, resulting in poor toughness of nylon workpieces, which greatly limits the application of nylon workpieces manufactured by selective laser sintering

In addition, due to the high melting point and high powder thermal stability of the existing nylon materials, the required working temperature is high, resulting in high requirements for equipment

Images