PET plastic bottles production process meets ISO standards

PET plastic bottles are highly regarded for their safety for human health, making them the most commonly used type of container today. Despite their widespread use in everyday life, not everyone understands their characteristics or the ISO-standard production process of PET plastic bottles. To gain a better understanding of this, let’s explore it further with Pavico in the following article!

1. What is PET?

PET plastic bottles are widely used for cosmetics, food, beverages, and pharmaceuticals. So, what exactly is PET plastic? PET, short for Polyethylene Terephthalate, is a type of flexible plastic belonging to the Polyester family, which is widely used in various fields. PET plastic is synthesized by polymerizing monomers with the formula (C10H8O4)n. Importantly, PET is a high-quality plastic that is certified to be absolutely safe for human health, free from plastic particles or harmful substances.

2. Characteristics of PET Plastic Bottles

PET plastic bottles are extremely common and useful in daily life. In terms of characteristics, here are some key points:

• PET plastic is transparent, lightweight, and odorless.
• It is a very strong material, safer than many other types of plastic.
• PET has an impact resistance of about 3.6 kJ/m2 and a melting point of approximately 260°C.
• PET plastic bottles are produced on modern, closed production lines following ISO standards to meet the safety criteria set by the Ministry of Health. The plastic surface often contains many large and small pores, making cleaning difficult.
• The recycling rate of PET plastic bottles is relatively low, around 20%.
• One of the most important properties of PET plastic is its viscosity. For example, in fiber form, it has a viscosity of 0.6 dl/g, while in bottle form, it ranges from 0.76 to 0.84 dl/g. PET has the ability to absorb moisture, which, when exposed to moisture, can lead to hydrolysis, reducing the molecular weight. Therefore, before processing, it is usually dried to remove moisture.

PET plastic is widely used from households and public places to various industries and manufacturing. Some notable applications include:

• Manufacturing bottles, containers, and water bottles for beverages (mineral water, soft drinks), or through injection molding for packaging purposes.
• In the food processing and packaging industry, PET plastic products are used to produce various types of containers, such as containers for grains and snacks.
• In the pharmaceutical and cosmetics industry, PET plastic bottles are also used as packaging for products such as shampoo, conditioner, shower gel, toner, and eye cream.
• In the textile industry, PET plastic is used in the production of handmade fibers, handbags, shoes, and more.

3. ISO Standard PET Plastic Bottles Production Process 

In addition to information about characteristics and applications, the ISO-standard production process of PET plastic bottles is a topic of great interest to businesses and customers. So, how is the production process of standard and safe PET plastic bottles carried out? The detailed process will be explained below.

• Production Planning: Based on the quantity of PET plastic bottles needed, a detailed production plan is established, including the amount of raw materials required, the progress schedule, and quality assurance throughout the production process.
• Preparation of Inputs: To produce standard PET bottles, high-quality, uncontaminated PET resin is required. Other components may also need to be prepared according to color requirements specified by the customer. Additionally, cardboard boxes are prepared for packaging and transportation upon completion of production.
• PET Plastic Molding/Blow Molding: PET plastic is heated to a temperature of 170 – 180°C for about 3 to 4 hours. Then, it is fed into a molding machine to create plastic preforms with the desired shape. Subsequently, the injection molding system transfers the PET plastic according to the process: Feeding plastic, compression, gas removal, plasticizing, and injection of liquid plastic.
• Cooling: The preforms are cooled using a cooling system. Each cycle can produce from 2 to 16 performs depending on the mold. Then, they are checked for air bubbles and quality before moving on to the bottle-blowing stage.
• Bottle Blowing: The PET preforms pass through a drying lamp system to increase flexibility and ductility. After irradiation, they are clamped into the mold. Compressed air is then pumped into the mold to increase the internal pressure of the mold, shaping the preforms to the required dimensions.
• Quality Control (QC): The finished products are removed from the production line and undergo quality control (QC). This is a critical step to ensure the quality of PET bottles, eliminating defective and scrap products.
• Assembly: Standard PET plastic bottles are transferred to the assembly section for capping.
• QC Inspection: After the capping process is completed, the products continue to be inspected by the QC team, evaluated based on various quality criteria and finishing.
• Custom Painting/Printing: Depending on the customer’s requirements for painting or printing, such as logos, slogans, or promotional messages, the products are completed accordingly.
• Warehousing and Storage: The final products are transferred to a storage warehouse, waiting for delivery to customers.
• Transportation: At the end of the PET plastic bottle production process, the products are transported and delivered to customers as per the agreement.

4. High-Quality, Affordable PET Plastic Bottles Production Facility. 

Proud to be one of the reputable and high-quality PET plastic bottle manufacturing partners in the market, Pavico is always confident in meeting all customer requirements. With our experience and a modern system of machinery and equipment, we are ready to provide customers with the best-priced, highest-quality PET plastic bottle production solutions. Pavico has a large-scale manufacturing facility in Phu Tho Province, equipped with modern machinery and a highly skilled workforce. We always strive to deliver quality products to our customers, as agreed upon.

The entire process of PET plastic bottle production is carried out comprehensively, meeting ISO quality standards and ensuring absolute safety for users.

Pavico is always ready to undertake custom PET plastic bottle production, committing to meet deadlines and specific design requirements.

Additionally, our pricing, services, and customer support policies are significant advantages of Pavico. We are confident in offering the most competitive pricing and discounts in the current market. We have quickly explored PET plastic, its characteristics, applications, and ISO-standard PET plastic bottle production processes together. If you need advice or a quote for high-quality, affordable PET plastic bottle production, please contact marketing@pavico.vn to take advantage of many offers and attractive gifts!