公开(公告)号：US20170253702A1

公开(公告)日：2017-09-07

申请号：US15507662

申请日：2015-04-24

Applicant: INSTITUTE OF CHEMISTRY, CHINESE ACADEMY OF SCIENCES

Inventor： Yongmei MA ,  Kun ZHENG ,  Jingnan ZHANG ,  Xinyu CAO ,  Fusong WANG ,  Xuechun LIN ,  Wenhua SUN ,  Jian XU ,  Jinyong DONG ,  Chuncheng LI ,  Wenxin FU

IPC: C08J3/12 ,  B33Y10/00 ,  B33Y70/00 ,  C08K3/34 ,  C08J3/20 ,  C08K3/04 ,  C08K3/08 ,  B29C67/00 ,  B33Y80/00

CPC classification number: C08J3/12 ,  B29C64/153 ,  B29C64/20 ,  B29C67/00 ,  B29K2105/0002 ,  B29K2105/251 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00 ,  C08G69/14 ,  C08G69/26 ,  C08G69/46 ,  C08J3/203 ,  C08J3/215 ,  C08J2377/02 ,  C08J2377/06 ,  C08K3/013 ,  C08K3/04 ,  C08K3/08 ,  C08K3/34 ,  C08K3/36 ,  C08K5/005 ,  C08K2201/005 ,  C08K2201/01 ,  C08L77/02 ,  C08L77/06 ,  C08L77/00

Abstract: This invention relates to a high molecular weight nylon powder composition for 3D printing, its preparation method and use. The composition comprises: 100 parts by weight of high-viscosity nylon powder, 1-5 parts by weight of a flow agent, and 0.1-1 parts by weight of an antioxidant; the high-viscosity nylon powder is one or more selected from nylon 6, nylon 66, nylon 11, nylon 12, nylon 612 and nylon 610; or the powder composition is obtained via polymerization reaction of the raw materials comprising the following components, based on the weight parts of lactam monomers or amide monomers: 100 parts by weight of lactam monomers or amide monomers, 0.005-1 parts by weight of a catalyst, and 0.1-1 parts by weight of an antioxidant. The high molecular weight nylon powder composition prepared in the present invention has a particle diameter in the range of 20-100 micrometers, good powder spreading performance, and is suitable for the 3D printing process, and the product of the high molecular weight nylon powder composition has good mechanical properties, good dimensional stability and low manufacturing cost.

公开(公告)号：US20170253681A1

公开(公告)日：2017-09-07

申请号：US15507670

申请日：2015-04-24

Applicant: INSTITUTE OF CHEMISTRY, CHINESE ACADEMY OF SCIENCES

Inventor： Heng SHEN ,  Jing GUO ,  Tang ZHU ,  Ning ZHAO ,  Jian XU ,  Wenhua SUN ,  Jinyong DONG ,  Chuncheng LI ,  Wenxin FU ,  Xuechun LIN ,  Yongmei MA

IPC: C08F220/18 ,  C08F2/44 ,  B29C67/00 ,  C08K3/08 ,  B28B1/00 ,  C08F2/50 ,  C08K3/00

CPC classification number: C08F220/18 ,  B28B1/001 ,  B29C64/106 ,  B29C64/165 ,  B33Y10/00 ,  B33Y70/00 ,  C08F2/44 ,  C08F2/48 ,  C08F2/50 ,  C08F2220/1808 ,  C08F2220/1816 ,  C08F2220/1825 ,  C08F2220/1883 ,  C08J3/12 ,  C08J3/203 ,  C08K3/011 ,  C08K3/013 ,  C08K3/08 ,  C08F220/14 ,  C08F2222/1013 ,  C08F2222/1026 ,  C08F2220/185

Abstract: The present invention provides a composition for 3D printing, a process for preparing the same and an article thereof. By the solidifying method of UV irradiation, 3D printing is implemented. During said implementation, there is no need of high temperature heating, thus energy consumption is reduced, and there is no need for special solvent, thus harm to the environment is reduced. Meanwhile, the present invention uses micro-nano powder as the main material and polymer resin as adhesive, and at the same time, adds irradiation sensitizer. After electron beam irradiation, the polymer resin forms three-dimensional crosslinked network, thereby the strength, heat resistance and chemical resistance are improved after resin adhesion. Additionally, the present invention, by the addition of UV crosslinking agent, and by UV irradiation, cross-links the unsaturated resin after extrusion in 3D printing to form three-dimensional network structure, thus greatly improves the heat resistance, chemical resistance and mechanical strength of the shaping material, and makes the unsaturated resin have broader application prospects in 3D printing material.

公开(公告)号：US20220314543A1

公开(公告)日：2022-10-06

申请号：US17597010

申请日：2021-03-29

Applicant: INSTITUTE OF CHEMISTRY, CHINESE ACADEMY OF SCIENCES

Inventor： Weizhi ZOU ,  Jian XU ,  Zhiyan ZHANG ,  Yan GAO ,  Xuechun LIN ,  Ning ZHAO

IPC: B29C64/268 ,  B33Y10/00 ,  B33Y30/00

Abstract: Provided is a 3D printing method and system using a near-infrared semiconductor laser as a heating source. The 3D printing system includes a printing spray head (4). In the 3D printing process, a laser beam is output by the near-infrared semiconductor laser to form a laser spot, which scans in an arbitrary path to cover a relevant area of a printed material for in-situ heating, thereby realizing the “asynchronous” printing mode. The near-infrared laser has higher penetration depth compared with a mid-infrared laser, so that the printing method using a near-infrared semiconductor laser as a heating source can be flexibly compatible with various printing platforms and the working process of the laser in the formed printing system can be decoupled from the 3D printing process of an article.

公开(公告)号：US20170259504A1

公开(公告)日：2017-09-14

申请号：US15507680

申请日：2015-04-24

Applicant: INSTITUTE OF CHEMISTRY, CHINESE ACADEMY OF SCIENCES ,  INSTITUTE OF SEMICONDUCTORS, CHINESE ACADEMY OF SCIENCES

Inventor： Xuechun LIN ,  Wenting WANG ,  Zhiyan ZHANG ,  Shusen ZHAO ,  Haijuan YU ,  Yongmei MA ,  Wenhua SUN ,  Jian XU ,  Jinyong DONG ,  Chuncheng LI ,  Wenxin FU

IPC: B29C67/00 ,  B33Y30/00 ,  B33Y10/00 ,  B23K26/12 ,  B23K26/00

Abstract: The present disclosure disclosed an ultraviolet laser 3D printing method for the precise temperature control of polymer material and device thereof. The device comprises a thermostat, a laser head, a non-contact type temperature monitoring device, a scanning galvanometer, a processing platform, a powder laying device, a material to be processed, a computer control system and so on. The method comprises: presetting a processing temperature by the control system; during the processing procedure, the temperature rise condition of the processed object is monitored by the non-contact type temperature monitoring device and fed back in real time to the control system; and by recording the rise value of the temperature within a certain period, the system can obtain the absorption capability of the laser and the temperature rise degree of the processed material, so that the laser output power can be calculated according to the preset processing temperature value, and the laser power can be adjusted in real time to precisely control the processing temperature. By means of the above device and method, precise temperature control of ultraviolet laser 3D printing prototyping for polymer materials can be realized.