Process And Device For The Recycling Of Polyester Materials

• Main Authors: BACHMANN HOGER, OTTO BRIGITTA, HALLY NAZIM S, DEISS STEFAN
• Format: Patent
• Language: Chinese; English
• Published: 13.07.2016
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

The invention relates to a process for the manufacture of granulates from a mixture of old polyester and fresh polyester which meets the demands made of food packaging, whereby the old polyester is melted, diol for the melting of the old polyester is added, the melted mass of the old polyester is mixed with the melted mass of fresh polyester from a melting reactor and the melted mass mixture is polycondensated in a high-viscosity melting reactor. The polyester melted mass is then granulated in an underwater granulator and the granulate thus manufactured is treated with a cleansing air stream in a dealdehydising container. 本发明涉及种用于从旧聚酯和新聚酯的混合物制造粒料的方法，该方法满足制造食品包装的需要，由此将旧聚酯熔化，添加用于熔化旧聚酯的二醇，将旧聚酯的熔化物质与来自熔化反应器的新聚酯的熔化物质混合并在高粘度熔化物反应器中缩聚该熔化物质混合物。然后在水下造粒机中将该聚酯熔化物质造粒并在脱醛容器中将如此制造的粒料用清洁空气流处理。