Extrusion blow molding processes are most commonly used to make hollow Pet Bottle Mould. These containers can be used in almost any size, from small squeeze bottles.
Materials used in blow molding
There are many materials for blow molding, but they are limited to thermoplastics.
Polyethylene is the most commonly used in blow molding materials, more specifically HDPE and HMWPE (high molecular weight polyethylene). The use of these high quality materials is more cost effective than the performance of low density polyethylene.
While these materials may be more expensive, the walls of the container can be thinner while still producing a high quality end product. Other materials used in blow molding production include PP (polypropylene), PVC (polyvinyl chloride) and polyethylene terephthalate.
HDPE stands for high density polyethylene and its inherent properties make it suitable for a variety of applications. It has high tensile strength, high rigidity, excellent chemical and solvent resistance, and meets FDA standards for direct food contact. Each year, more than 8 million tons of HDPE are used to make blow molded containers such as detergent bottles, milk jugs, and trash cans.
This accounts for almost a third of the world’s annual HDPE production. Although the container for consumer goods constitutes a large part of the blow molded product, it is also used in many other products. Toys, large storage tanks, 55-gallon drums and gas tanks for transporting liquids or powders are just a few of the other products made with HDPE.
What products have been created by blow molding?
Blow molded products can be used to produce high quality, functional and lightweight containers that are ideal for a wide range of applications. Although the materials may vary, depending on the product being produced, the durability and cost-effectiveness of blow molding are consistent.
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