聚乳酸消光切片生产工艺

聚乳酸消光切片生产工艺，包括以下步骤:（1）、将二氧化钛、催化剂、稳定剂充分融合成为悬浮液，丙交酯和悬浮液加入到搅拌罐内进行搅拌作业；（2）、丙交酯混合物经聚乳酸预聚混料装置的预热混合后到初聚罐内进行初步聚合；（3）、在终聚罐内进行最终聚合；（4）、第三计量泵将聚乳酸熔体通过动静体管道式混料装置再次混合挤出喷丝板并计量；（5）、聚乳酸熔体水冷凝固到常温后进行切片。本发明确保预聚合管内的熔体在恒定速度状态下向下流动，并使预聚合管内熔体温度也基本致，本发明直接在第三输料管上设置若干组混料单元即可，省去了在输送管道上安装混料系统，节约了成本，达到均匀混料之目的，输送及混料效率大大提高。 The invention relates to a polylactic acid extinction slicing production process. The polylactic acid extinction slicing production process includes the following steps that (1) titanium dioxide, a catalyst and a stabilizer are sufficiently fused into suspension liquid, and lactide and the suspension liquid are added into a stirring tank to be subject to stirring operation; (2) a lactide mixture is subject to pre-heating mixing through a polylactic acid pre-polymerization mixing device and enters an initial-polymerization tank to be subject to initial polymerization; (3) final polymerization is carried out in a final-polymerization tank; (4) a polylactic acid melt is mixed again through a movable and fixed integrated pip