Difference between polyethylene and polypropylene materials for rotomolded boxes

Difference between polyethylene and polypropylene materials for rotomolded boxes

Normally, the raw material commonly used for roto-molded boxes is polyethylene, but some manufacturers also use polypropylene to produce roto-molded boxes. So what is the difference between these two materials? Which material should be used to produce products that meet the requirements of qualified product quality? Today, the editor will explain in detail from the following points.

Features:
Polyethylene roto-molded boxes are a common packaging container material with excellent waterproof and moisture-proof properties. They are also lightweight, flexible, low-cost, and reusable.
Polypropylene roto-molded boxes are durable and have excellent pressure resistance. They also offer good transparency and temperature stability. Many injection-molded boxes are made of this material.

Physical Properties
Polyethylene has excellent chemical stability, but is not resistant to strong oxidizing agents such as fuming sulfuric acid and concentrated nitric acid. Polypropylene has higher heat resistance than polyethylene and can withstand higher temperatures without softening, deforming, or breaking.

Plasticity
Polyethylene has good fluidity, a low processing temperature, moderate viscosity, and a low decomposition temperature, making it a highly processable plastic. Polypropylene exhibits good fluidity at high temperatures and maintains a stable size and shape after cooling, resulting in excellent formability and plasticity.