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With the continuous improvement of environmental awareness, the utilization of recycled resources has gradually become an important development trend in the chemical industry. As an important raw material for chemical production, the manufacturing method of regenerated PET has attracted much attention. This article will provide a detailed introduction to the manufacturing method of regenerated PET, including key steps such as raw material selection, pretreatment, and melt granulation

2、 The main raw material for recycled PET is waste PET plastic bottles. Choosing high-quality waste PET plastic bottles is crucial for the quality of recycled PET. Waste PET plastic bottles that are free of pollution, impurities, and uniform in color should be selected

3、 Pre treatment 

Pre treatment is to convert waste PET plastic bottles into fragments suitable for recycling processing. The pre-treatment steps include cleaning, crushing, and drying

1. Cleaning: Clean the waste PET plastic bottles thoroughly, remove labels and other attachments. It can be cleaned with water and detergent

2. Crushing: Crush the cleaned waste PET plastic bottles into small pieces or fragments to facilitate the subsequent melting and granulation process

3. Drying: Dry the crushed fragments to remove any moisture

4、 Melt granulation 

Melt granulation is a key step in the manufacturing process of regenerated PET, including melting, filtration, and pelletizing

1. Melting: Add the preprocessed fragments into a high-temperature melting machine, heat them to a certain temperature, and melt the fragments into PET melt

2. Filtering: During the melting process, a certain amount of filtering agent needs to be added to remove impurities and substances with uneven colors from the melt

3. Particle cutting: The filtered melt is cooled and hardened to form cylindrical particles of a certain length, namely regenerated PET particles

5、 Post treatment is aimed at further improving the quality and purity of regenerated PET particles. The post-processing steps include particle cleaning, drying, and screening

1. Particle cleaning: Clean the regenerated PET particles to remove impurities and residues

2. Drying: Dry the cleaned particles to remove any moisture

3. Screening: The dried particles are screened and classified according to different particle size specifications to meet different production needs

6、 Notes: During the manufacturing process of regenerated PET, the following precautions need to be taken: 

1 Control various process parameters to ensure stable product quality

2. Regularly check the operation status of production equipment to ensure its normal operation

3. Strengthen safety management during the production process to prevent accidents from occurring

7、 Conclusion: As an important raw material for chemical production, the manufacturing method of regenerated PET includes steps such as raw material selection, pretreatment, melt granulation, and post-treatment. In the actual production process, it is necessary to pay attention to controlling process parameters, equipment maintenance, and safety management to ensure product quality and production safety. With the continuous improvement of environmental awareness and the increasing scarcity of resources, the manufacturing of recycled PET will become an important development direction in the future chemical industry.