Plastic Resin Descriptions
Polyethylene Terephthalate (PETE)
This type of plastic is used for its strength, impact resistance, clarity, and barrier resistance to things such as moisture, oxygen, and many chemicals. PETE is typically produced in clear but can also be done in colors such as green and amber.
High Density Polyethylene (HDPE)
The natural state of HDPE is a cloudy, slightly translucent color. It has good chemical resistance, does not absorb moisture, and provides a good water vapor barrier. HDPE is one of the most popular plastics for molding bottles and containers.
Polyvinyl Chloride (PVC)
Typically clear in appearance when used for containers, PVC has outstanding resistance to water, alcohols, concentrated acids, and alkalines. It can be produced to yield superior flexibility.
Low Density Polyethylene (LDPE)
LDPE is a very flexible plastic with good barrier properties translucent in colorwith a tough, waxy texture.
It is best known for its flexibility and versatility. It can be molded into many applications; the most popular use in packaging is for closures. PP is very tough and has good chemical resistance. Although normally translucent in appearance, PP can be made a variety of colors.
A very clear, rigid plastic with good chemical resistance, but no moisture or oxygen barrier properties. PS tends to be brittle, so cracks and breaks easily.
Can be any combination of plastics. Usually one of the above plastics mixed with an additive or barrier plastic to enhance the properties of the final container.