Blow Molding High Density Polyethylene
HDPE is a relatively low cost high, strength plastic which is used in a wide range of applications, one set 
of these being blow molding applications. HDPE is an acronym which stands for High Density PolyEthylene, a type of polyethylene which is defined as having a density equal to or greater than 0.941 grams per cubed centimeter.
Blow molding grade HDPE is a type of HDPE which possesses specific physical properties which make it suited to blow molding applications, the main one of these being a low melt flow index. Melt flow index is a measurement used to describe how fast the plastic flows when melted. Blow molding grade HDPE has a very low MFI, and flows quite slowly when melted. This makes it ideal for blow molding applications where the resin must be thick, flow slowly, and withstand the force of the compressed air which blows it up to the shape of the mold without forming areas of weakness.
Blow molding is commonly used to make bottles, tanks, and other receptacles. HDPE is an excellent material for these types of applications as it lends itself not only to the manufacturing process, but the end products have good tensile strength, high impact resistance, and good chemical resistance as well. When virgin blow molding grade HDPE is used in the production of products, the result is strong, translucent white containers and vessels which can also be colored or otherwise appropriately labeled. Because HDPE is not very reactive, HDPE vessels are popular for the storage of some chemicals and are quite commonly found in science labs.
Recycled HDPE is quite often used in blow molding applications, especially in the making of tanks and other such items where appearance is not key. Recycled HDPE is often colored, and it is common practice to melt recycled HDPE pellets, granules, or regrind down and simply add a dark color, such as black to cover whatever shade the recycled regrind may have been. In some instances it is possible to obtain translucent recycled HDPE granules or pellets, which lend themselves to the creation of translucent products, or being colored brightly, however where appearance is important, virgin blow molding grade HDPE comes most highly recommended.
High Density Polyethylene Suppliers
We supply HDPE of all grades and types. Please contact us through the below form and let us know your detailed requirements. We will get back to you with HDPE availability and price quote