During the plastic pelletizing process, various problems often arise, directly impacting pellet quality and the stability of the subsequent extrusion process. The following analyzes common problems and proposes corresponding solutions to quickly identify the issues and optimize production.

A screen changer is a manual or automatic switching device consisting of one or more filters. It is used to remove foreign particles and impurities as the plasticized material flows through the filters. It can be used to filter any type of polymer, rubber, or ceramic melt. A screen changer can be installed on any existing extruder, melt pump, reactor, or other extrusion line.

KiTech Machinery, located in Zhangjiagang, Suzhou, is a leading manufacturer of recycling equipment. Last week, the KiTech KCP80 pelletizing system was tested for pelletizing LDPE film and BOPP film bags. The pellets produced exhibited uniform color, a smooth surface, no bubbles, and excellent heat resistance. The finished pellets can be used for secondary processes such as blow molding, injection molding, blown film, and pipe extrusion, forming a seamless closed-loop production cycle.

Bangladesh's plastic industry has an average annual growth rate of over 18%. With a population of 165 million and cheap labor, it faces a high dependence on imports of raw materials and machinery - China accounts for 65.9% of its raw material supply. This emerging Asian market is opening up a blue ocean of value for global investors.

1. Efficiently deal with complex impurities, suitable for a wide range of plastic types

This week, Kitech Machinery successfully tested the automatic laser filter system with integrated melt pump. The system is designed for efficient filtration of various stubborn impurities in plastic recycling materials (such as PP, PE, LDPE, HDPE, PS, EPS, ABS, PVB, PVC, etc.). It can effectively filter a variety of pollutants including iron, steel, wood chips, paper, textile fibers, unmelted plastics, aluminum, sand, copper, stones, etc., and significantly improve the quality of recycled pellets.

I. Project Overview:

Last week, KITECH Machinery successfully completed the test and verification of the combined system of KCP100-120 compaction and cutting water ring granulator and AGF500/700 crusher. The system is customized for a Mexican agricultural pipe manufacturer. Its process flow is: after the raw materials are crushed by the AGF crusher, they are stably transported through the transfer silo, and finally enter the granulation system through the conveyor belt to complete the granulation.

In the PET recycling process, it is very important to choose the right type of extruder when granulating PET bottle flakes for re-production. Single screw extruder and twin screw extruder are two common granulation equipment, each with its own advantages and disadvantages, suitable for different application scenarios. The following is a detailed analysis of the two extruders and how to choose the right equipment to produce high-quality PET pellets.

Düsseldorf, Germany | 8–15 October 2025 | Stand 8B-D52

As a global innovator in sustainable plastic recycling, Kitech Machinery invites you to join us at K 2025 – the world’s leading trade fair for plastics and rubber. Discover how our advanced technologies are redefining circular economy standards across the industry.

The new generation of 5G KCP series granulators with self-cleaning laser filter from Kitech Machinery. This advanced system has excellent performance and sets new benchmarks in productivity, material versatility and operating economy.

In the PET bottle recycling and washing production process, in order to ensure the quality of the final PET bottle flakes (recycled materials), the following non-standard PET bottle types must be manually pre-sorted:

Last week, the AGS1200 single-shaft shredder was successfully operated at the Kitech factory, achieving a production of 500-600 kg/hour in the shredding process of LDPE film. At the test site, the process was still running smoothly in the face of large volumes of LDPE film, and the output size was uniform. The shredded film can be directly sold as a recycled raw material or further processed.

In the PET bottle recycling and washing line, the rinsing tank (Floating Washer) is a key equipment used to separate light impurities (such as labels, bottle caps, foreign matter, etc.) in PET bottles. It can be used in conjunction with the entire washing line or alone. It mainly uses the density difference of different materials to complete the separation of light impurities, ensuring that the PET bottle flakes maintain high purity in subsequent production processes.