Blowing Pet Preforms » Discussions

Blowing Pet Preforms

  • May 21, 2019
    PET makes our lives easier and helps us produce products more cost-effectively.

    One of the ways we do this is to use a method called blow molding. Blow molding is around you, you don't even know. The bottle of soda you drink has a [u]Pet Preforms[/u] that is blow molded.

    But what exactly is blow molding, how does it work? Read on and find out!

    What is blow molding?
    Blow molding is a process used to make PET products. The process involves heating a PET tube (referred to as a preform or parison) to its melting point and then placing it into the cavity of the mold.

    Then, they inflated the melted PET like a balloon with compressed air, making it appear in the shape of the mold, but the interior is hollow. The amount of PET and the pressure determine the thickness of the final product.

    Blow molding history
    Blow molding originates from glass blowing, and the craftsman heats the glass to the melting point and then inflates the glass through the tube. Blow molding has existed since the 19th century. A patent at the time showed a blow molding process used with cellophane polymers. These early methods are not suitable for mass production.

    In the 1930s, they developed commercial machines to make blow molded bottles and made mass production possible. The materials available are too brittle and the production time is too long to be effectively used for mass production.

    With the production of low-density polyethylene and high-density polyethylene, blow molding has become the mainstream in the industry. This has revolutionized many industries, including the soft drink bottling industry and the automotive industry.

    What can blow molding do?
    You can make almost any hollow PET container by blow molding, but this process is not limited to bottles. The blow molding method for [u]Pet Preform Mould[/u] is widely used and is a good method for producing a large number of parts at low cost.