The quality of recycled PET bottle flakes directly affects the profit level, so improving the quality of recycled PET bottle flakes is a crucial part of the PET recycling industry. The key to improving the quality of recycled PET bottle flakes lies in optimizing the process of the PET washing line, especially in handling humidity, PVC content, and characteristic viscosity.
Improving PET Bottle Flake Quality With PET Washing Line
Humidity Management
水分是影响回收PET瓶片质量的最重要因素之一。水分含量过高会影响产品性能和加工。因此，清洗后应尽量减少PET瓶片的水分含量。
为此，建议使用脱水干燥设备，如PET瓶片干燥机，或者，如果有更高要求，使用干燥管或风选机，将水分含量降至5%以下。
PVC Content Control
废PET瓶中PVC含量较高，主要以标签纸的形式存在。为了确保回收PET瓶片的质量，在加工前必须将PVC完全去除。这可以通过塑料瓶脱标机来实现，该机的脱标率超过98%。
然后，水槽浮子塑料分离器可以分离残留的 PVC 碎片。另外，在热洗槽中添加清洁粉可以进一步降低PVC含量，保证生产出更高质量的回收PET瓶片。
Characteristic Viscosity Management
特性粘度是回收PET瓶片的重要指标之一，过度的清洗过程会导致物理性能的改变，特别是粘度的下降。为了避免这种情况的发生，需要在洗涤过程中控制烧碱的用量和洗涤时间，以保证瓶片的特性粘度稳定。通常建议在热洗槽中的处理时间不要超过45分钟，以保持产品的稳定性和一致性。
Conclusion
In summary, optimizing the PET washing line process is the key to improving the quality of recycled PET bottle flakes. By reasonably managing humidity, and controlling PVC content and characteristic viscosity, we can produce higher quality recycled PET bottle flakes, improve profit level, and at the same time make a positive contribution to environmental protection.
