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Synthesis of PET bottles in industry

Yanting Li¹,*

Backgroud

Manufacturing part gives detail information of how to produce PET bottles. To be concrete, this section will conclude the main stages of process, method and appearance processes in industry.

QMES Academic, this issue

Abstract

The PET bottles are most commonly produced from PET. The advantages of using PET for bottling are its recyclability, light weight anf strength. There will introduce the injection stretch blow moulding method involving two steps which is widely used in the industrial manufacturing process of PET bottles. Besides, the surface treatment and transparency are also introduced in this page.

PET Bottle Manufacturing Process

From the raw materials to the final products, every stages of production strictly adheres to the benchmark of inductry and shown as the following figure.

Figure 1: Manufacturing Process of PET Bottle

These stages mentioned above are the general manufacturing process in the industry. And they can be concluded into three common steps:

STEP 1 PET is first heated up and placed in a tube shaped mold called a parison, which is cut into the suitable length after it is cooled. STEP 2 The parison is also heated up and placed into a bottle shaped mold, with a screwtop included. A mandrel (steel rod) is inserted into to allow highly pressurized air to enter and stretch the plastic. The molecules then polarize, because of the combination of stretching and high temperature to produce a product. STEP 3 The bootle is cooled quickly to aviod creep and then removed.

PET（Polyethylene terephthalate）

PET（Polyethylene terephthalate）

Manufacturing

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