Plastic Bottles and Their Complex Manufacturing Process

Plastic Bottles and Their Complex Manufacturing Process
Human hand taking mineral water from shelf in supermarket

Plastic bottles are one of the most used items in the world. They are used for mostly storing liquid items. Ever wondered how they are created in the first place? Nope! Continue to read on. They are created through a process known as molding. The process involves giving the interior and exterior of plastic products using metal objects or molds. The creation of plastic bottles can be divided into two phases.  

In the first phase, small test-tubes like structures are manufactured. They are known as Pet Preform. custom injection molding is the name of the process that is used here. PET is the acronym of Polyethylene Terephthalate, a thermoplastic polymer. It is found in both opaque and transparent variants. PET is manufactured by the chemical reaction between terephthalic acid and ethylene glycol.       

The PET is used in the granular form for the manufacturing process of PET Preforms. Any moisture is removed prior to the next stage of manufacturing. In the second phase, a steel rod is inserted into the PET Preforms that fill the inside with the pressurized air. As a result, Pet Preforms expand in volume and take the actual shape of plastic bottles we use in our everyday lives. The process is known as stretch blow molding.   

The metal object used in the molding process is the most important thing in both steps. They are the ones that provide shape to the Pet Preforms and water bottles in the first and the second step respectively. To get the best results, it is advised to get the best quality molds for the purpose.

Plastic bottles are popular due to many reasons. They can keep the liquid such as water and other types of beverages for hours or in some cases, days without spoiling the quality. They do not react with the liquid materials stored inside them. It helps in keeping the integrity of the stored liquid intact.

The other major advantage of using plastic bottles is their durability. They are for the large part remains absolutely indestructible. They do not break unless you bludgeon them to a pulp. They will just get a dent even after getting hit or dropped from a height. The structural integrity of the plastic bottles varies according to their purpose. They can be either soft or hard depending on their usage.

The molding industry is a massive industry. It runs on quality molds and a wide variety of molding techniques. The molds are designed carefully to give a defect-free final design. Advanced software and CNC machines are used for the designing and manufacturing of molds, respectively. Excellent accuracy is the major advantage of these machines.

Plastic bottles are one of the cheapest ways to store water and other types of beverages. A good cap is required to provide safety and the integrity of the stored liquid. Thee caps are manufactured in a simple molding process by using bottle cap moulds. The massive competition ensures that only the reputed Pet Preform molds Inserts manufacturers remain in the business.