New Material for 3D Printing of Orthotics

Cryos技术是一个著名的加拿大制造商的矫形器与显着的矫正和 物理性质多年来，这家公司一直采用热成型工艺使用聚氨酯模具 通过聚丙烯片生产矫形器。然而，他们无法满足 由于市场的一个主要瓶颈，从模具制备过程中的费力。应用 SLS 3D被认为大大加快了制造速度。然而，他们不得不更换 他们的廉价原料，聚丙烯，高价格的尼龙11，以满足工艺要求。的 尽管通过3D打印机增加了容量，但是所得到的产品在成本上没有足够的竞争力。因此，我们认为， 采用电晕处理对PP进行表面改性，提高PP的粘结性能， 在烧结过程中的界面层。此外，界面扩散将被促进， 在界面层内，由于在聚合过程中的链断裂导致分子量的局部降低。 电晕暴露。因此，印刷的矫正器的体积孔隙率将显著降低，导致 提高产品的抗疲劳性能。

Cryos technologies is a well-known Canadian manufacturer of orthotics with remarkable corrective and physical properties. For years, this company has employed a thermoforming process using polyurethane molds to produce the orthotic through polypropylene sheets. However, they cannot respond to the ongoing demands of the market due to a major bottleneck, derived from the laborious process of mold preparation. The application of SLS 3D was considered to considerably accelerate the manufacturing rate. However, they had to replace their inexpensive feed, polypropylene, for a high-priced Nylon 11 to meet the process requirements. The resulting product is not sufficiently cost competitive despite the increase of capacity by 3D printers. Therefore, a modified PP will be produce by modifying the surface by Corona treatment enhancing the binding properties of the interfacial layers during the sintering process. Moreover, the interfacial diffusion will be promoted by a local decrease of the molecular weight, within the interface layer, resulting from the chain sission during the Corona exposure. Therefore, the bulk porosity of the printed orthotics will decrease significantly resulting in the improvement of the fatigue resistance product.