Smart Molding International 3-2021

materials 46 smart_molding international 3/2021 P olymaker, a leading manufac - turer of 3D printing materials, uses a recycled polycarbonate developed by Covestro, a globally leading materials supplier, to produce Polymaker™ PC-r, the polycarbonate filament for 3D printing made from recycled plastic. The material comes from 19-liter bottles from Chinese water supplier Nongfu Spring, which contain polycarbonate in a fairly pure form. Covestro blends the plastic waste with virgin material to yield a polycar - bonate base that can be extruded into filaments for use in electronics auto - motive and other industries. The filament is particularly suitable for brands wanting to make their sup - ply chain more sustainable, especially in combination with 3D printing tech - nology for production on an industrial scale. Compared to virgin material, the filament using recycled material has a lower carbon footprint. The product is also more durable and meets industry- specific requirements such as the Blue Angel and EPEAT seal. The fact that the waste comes from one single source is an advantage. This means that no prior sorting and iden - tification of the plastics is necessary. The plastic waste is quite pure and can be recycled in a cost-effective manner. In addition, it is available in sufficient quantities. In China, large-volume wa - ter bottles are widespread in private households and public places. These are collected and refilled again and again before finally discarded and sent for recycling. This is another example of how Covestro is helping to build a circular economy in collaboration with partners along the value chains. The high temperature post-con - sumer product has outstanding ther - mal stability and strength. Because of its properties, a constant tempera - ture chamber is required to print successfully. Machine manufacturer INTAMSYS (a world-leading high-tech company pro - viding 3D printing and industrial direct additive manufacturing solutions for high-performancematerials) conducted print tests with Polymaker™ PC-r on its FUNMAT PRO 410 printer. The printer can achieve a dual jet temperature of up to 500°C and a platform temperature of up to 160°C. The chamber tempera - ture can be up to 90°C, which prevents warping of printed parts and allows larger and more complex models to be printed more successfully. Tests have demonstrated that the Polymaker™ PC-r material is ex - tremely easy to process. The test scores show good values for tensile strength, Young's modulus, flexural strength and flexural modulus, which were slightly higher than standard polycarbonate. Covestro www.covestro.com Covestro makes recycled plastic suitable for 3D printing Covestro and Polymaker collaborate on a polycarbonate filament with reduced CO₂ footprint made from recycled plastic bottles from Chinese water supplier Nongfu Spring. The new material was trialed by INTAMSYS. This is another example of how Covestro is helping to build a circular economy in collaboration with multiple partners along the value chains. Covestro is among the world’s leading polymer companies. Business activities are fo - cused on the manufacture of high-tech polymer materials and the development of innovative, sustainable solutions for products used in many areas of daily life. The main industries served are the automotive and transportation industries, construc - tion, furniture and wood processing, as well as electrical, electronics, and household appliances industries. Other sectors include sports and leisure, cosmetics, health and the chemical industry itself. Polymaker® PC-r polycarbonate filament for 3D printing is made from a Covestro plastic recyclate produced from used water bottles from Chinese water bottle manufacturer Nongfu Spring (Picture: Covestro)