Difference in LDPE & HDPE

Polyethylene (PE) is one of the most commonly used plastics today. Developed in 1933, it is now used mostly for packaging items. It is classified based on types of branching and the property's density. Low Density Polyethylene (LDPE) and High Density Polyethylene (HDPE) are two forms of PE.

Characteristics of LDPE

• LDPE was the first PE to be developed. It has low-density levels and only a small amount of branching. It is very flexible and easy to clean. It is often used to make plastic film wrap and plastic bags. Additionally, it is used to make plastic items that need to be molded, such as plastic bottles used in labs and some prostheses.

Characteristics of HDPE

• HDPE has higher density levels; it is also characterized by a linear structure consisting of no branching. That makes HDPE stronger and more resistant to chemicals. It is most commonly used for items requiring blow molding techniques, such as toys, automobile parts and bottles. It is also used to create cutting boards since it meets FDA food service standards.

Environmental Concerns

• Although most of these plastics can be recycled, much of it ends up in our trash cans. There are concerns in the environmental industry that, since these plastics do not break down easily in a landfill, there will be many future negative effects due to our overuse of these products.