Today, the services and products of large plastics factories have become an integral part of our lives. This means that most raw materials, from the production line to customer use, are made using plastic bottles. This makes life almost impossible or difficult without plastics and related products. Therefore, it is not bad to get acquainted with the importance of plastics and polyethylene bottles and know what goes behind each production line. In this PETROPROVIDERS article, join us to introduce you to polyethylene bottles and their production methods.

Full introduction of plastic bottles

introduction of plastic bottles

introduction of plastic bottles

Plastic bottles are generally divided into two categories; PET bottles and polyethylene bottles. Production of PET bottles is generally done in two stages by plastic injection machines. These devices were usually inflatable and at first, seemed to be an ideal option. However, building, purchasing, or maintaining these devices is extremely costly and difficult.

Therefore, all kinds of machines for producing polyethylene bottles have long replaced expensive and old technologies and have shortened the manufacturing process. Also, these devices require less manpower.

These devices are very similar in construction to plastic injection machines. These similarities are sometimes so great that some of them are called pneumatic injectors. Of course, no matter how many similarities there are, they make a major difference; Injection clamps and nozzles.

In the process of producing all kinds of bottles, storage containers, plastic containers, etc., these devices are usually used. Economically, pneumatic devices are much cheaper than PET bottle injectors or inflators. This difference is such that the daily cost of a PET production line is estimated to be approximately 1.5 times that of polyethylene machines.

Common plastics used in this product line include detergent bottles, which are sometimes confused with PET bottles for their transparency. However, the transparency of these bottles is only related to the material of their raw materials and has nothing to do with how they are produced.

Of course, the devices used to produce these containers are still pneumatic, but the raw material for their production is propylene. These devices are also known as inflatable PP devices due to this use.

Production line of polyethylene bottles

Production line of polyethylene bottles

Production line of polyethylene bottles

In general, all bottles containing carbonated drinks, mineral water, radiator water, etc. are made of PET (polyethylene terephthalate). PET bottles can be produced in various sizes, including 250 ccs and even up to 4 liters and higher volumes.

The production line of polyethylene bottles includes machines such as preform injection, PET blower, and bottle cap injection, which are very important in the global industry. In the following, we will examine each of these sections.

1. Preform injection in the production process of polyethylene bottles

This machine is a plastic injection machine. The main differences between PET machines and normal injection are the large size of the machine body, which shows the power of the extruder. Similarly, the Mardon cylinder of the device and the control clamps will be larger and generally improve the quality of the device.

Of course, this volume comes with a high price and therefore makes it difficult to choose. The decision to make this choice is usually based on the number of holes in the molds and the initial purchase budget.

Various examples of these devices are produced around the world; For example, some of these devices also offer buyers a capacity of up to 24 holes. Of course, these cavities increase in ascending order, and the base state of these devices are generally designed to inject 200 tons of preform. 32-hole modes for 300 tons and 48-hole modes for plastic injection of about 500 tons are also recommended.

2. Inflatable devices:

The task of these devices is to turn the preform into a bottle. These devices use the heat emitted from the device to inflate the plastic and turn it into a bottle. These devices are designed in manual, semi-automatic, or automatic mode and vary depending on the overall work process.

3. Bottle cap injection:

A special mold injection machine is used to produce the bottle cap, and most factories use a versatile injection machine to produce it. Usually, according to the total weight of the load and the number of doors, the production of the final cargo is determined and enters the final stages of production by a versatile machine.

Using these bottles in everyday life

Using PET bottles

Using PET bottles

Finally, all the steps are taken to the collection line, where the bottles are delivered ready to food factories. However, due to the bulk of the bottle (especially polyethylene bottles) and the high cost of handling, the puff molding stage is done in the factory and before the filling stage.

Today, detergents and carbonated beverages are the most widely used of these plastics, forcing plastic injection machines to be upgraded. With the increase in use, these devices can produce containers with a larger volume that can hold detergents up to about 20 liters.

Today, plastic bottles have a wide range of applications in our daily lives. Also, a lot of money and energy is spent on the production of these bottles. Therefore, they should never be disposed of as waste.

Plastic recycling machines are ready to produce new bottles with these plastic parts. By doing so, we both reduce the cost of producing granules and save the environment from increasing pollution.

Summary of Polyethylene bottles and their applications

In this article, PETROPROVIDERS, we saw the production process of plastic bottles and polyethylene bottles. In general, these bottles are used for packaging all kinds of food. Therefore, it can be said that these bottles are not harmful to human health and the environment.

The use of pet bottles is very popular; Because these bottles are cheap and their recycling is almost like HIPS polystyrene and GPPS polystyrene. Of course, it should be noted that these bottles are produced in standard conditions; As standard for phthalic anhydride production.

What do you think about polyethylene bottles? Are these bottles suitable for everyday use? Are their use dangerous to human health and the environment? How to increase the production efficiency of plastic bottles? In the comments section, you can ask questions about our types of polymers and chemicals from our experts.


What are PET Bottles?

These bottles are made of polyethylene terephthalate. The name PET stands for polyethylene terephthalate.

Is it safe to use polyethylene bottles?

Yes! The FDA has stated that the use of PET bottles is not particularly harmful to human health.

Are PET Bottles Cheaper or Glass?

In general, these bottles are almost the same price; But glass bottles are cheaper than PET.

Can polyethylene bottles be used more than once?

Although these bottles are safe for humans, it is best to use them only once.