Analysis of the production process and application fields of PET plastic rolls in China

Editor:Haining Hongkai Technology Co., Ltd. │ Release Time:2023-05-31 

With the growing maturity of China PET plastic roll sheet production , before 2013, the production of PET plastic rolls was mainly dominated by European and American countries. However, with the development of China, more and more factories are manufacturing PET rolls, and with the stable upstream and downstream supply chains, the raw materials and production materials for PET plastic rolls are readily available. The quality control system is also becoming increasingly mature, and products can be applied in a wide range of fields and applications.

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Production process of PET plastic rolls in China:


The following content is the most important part that I want to introduce about the production process of PET plastic rolls in China. It includes several steps from raw material pretreatment to extrusion molding and subsequent processing, and I will introduce them carefully. So let's begin!


1. Production process:


1. Raw material pretreatment:

What are PET plastic rolls made of? Of course, they are made of polyester resin. Before processing, we must preprocess the raw materials. If we can strictly follow the processing procedures, which include drying, mixing, and coloring, we can make sure that the raw materials are in the best state for roll manufacturing. If these steps are done well, the final product quality will be the best.


2. Extrusion molding:

Next, what's the second step? It's the most challenging step in the process, as if it's not done well, it can easily cause unevenness or imperfections after forming. First, the preprocessed raw materials are added to the extruder. After heating and pressure, they are extruded into sheets. Then, the sheets are cooled on cooling rolls and stretched into thin sheets using a stretching machine. Finally, they are rolled up to make rolls.


3. Subsequent processing:

The manufactured PET plastic roll needs further processing, such as cutting, embossing, and film lamination. These steps can be customized based on specific needs to meet different application fields.


What are the raw materials of PET plastic rolls?

The choice of raw materials is a critical factor affecting the quality of PET plastic rolls. The commonly used PET resins on the market are mainly divided into three categories: bottle-grade, fiber-grade, and film-grade. Among them, bottle-grade is the highest quality raw material, mainly used in high-end industries such as food and medicine, while film-grade is mainly used for industrial purposes like manufacturing PET plastic rolls. In addition to the selection of raw materials for PET plastic rolls, there is another factor that affects the properties of plastic rolls, which is static electricity. Therefore, anti-static treatment must be done. Adding UV stabilizers during the production process can also improve the product's resistance to ultraviolet radiation and extend its service life.


Quality control of PET plastic rolls:


PET plastic rolls are generally used in products with strict safety and protection requirements, and they should also prevent the rolls from being too fragile. Therefore, quality inspection is essential. To ensure the quality of PET plastic rolls, strict control should be carried out for each link in the production process. There are mainly three quality control processes: raw material testing, production process control, and product inspection. They are all crucial. Next, let me introduce these three processes.


1. Raw material testing:

Before selecting the raw materials, strict testing should be carried out to ensure that the selected raw materials meet the product requirements. These tests mainly include physical performance testing such as density, viscosity, melt index, flexural strength, and chemical property testing such as HU value and ferrous ion content.


2. Production process control:

During the production process, operations should be strictly carried out according to the prescribed process to ensure the stability of the size, surface smoothness, and mechanical properties of PET plastic rolls. In addition, real-time monitoring of processing parameters should be carried out, such as extrusion temperature and extrusion speed, to ensure that the process parameters are within an appropriate range.


3. Product inspection:

After the production of PET plastic rolls is complete, product inspection should be done to determine whether it meets relevant standards and quality requirements. These tests mainly include appearance, size, mechanical properties, heat resistance, chemical resistance, etc. Only through strict inspection can the quality of PET plastic rolls meet the standards and satisfy user needs.


Application fields of PET plastic rolls:

As a universal industrial material, PET plastic rolls are widely used in various fields. We will mainly introduce their application in the packaging industry, construction industry, and manufacturing industry.


1. Packaging industry:

PET plastic rolls have been widely used in the packaging industry, especially in the food and medical industries. They have excellent physical and chemical properties, can effectively protect products from pollution and damage, and improve product aesthetics and display effects.


2. Construction industry:

PET plastic rolls also have many applications in the construction industry. For example, in the roof waterproofing system, PET plastic rolls are widelyused as a waterproof layer due to their high strength, durability, and chemical resistance. They are also used in insulation materials, floor coverings, and geotextiles.


3. Manufacturing industry:

In the manufacturing industry, PET plastic rolls can be used for various purposes, such as electrical insulation, automotive interior decoration, and printing substrates. They are also used as industrial tapes, labels, and protective films for electronic products.

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In conclusion, PET plastic rolls are widely used in many fields due to their excellent physical and chemical properties, including high strength, durability, chemical and UV resistance. The production process of PET plastic rolls in China has become increasingly mature, with strict quality control in each link of the production process. As a result, PET plastic rolls have been widely applied in packaging, construction, and manufacturing industries, providing effective solutions to meet the needs of different applications and improve product performance.