How does the weight of polyethylene compare to polypropylene in outdoor ottoman designs?

When selecting materials for outdoor ottomans, weight is a critical factor for both portability and durability. Polyethylene (PE) and polypropylene (PP) are two popular plastics used in outdoor furniture, but they differ significantly in density and weight.

Polyethylene is generally lighter than polypropylene, with a density ranging from 0.91–0.96 g/cm³, while polypropylene has a slightly higher density of 0.90–0.91 g/cm³. Despite this small difference, polyethylene’s molecular structure often makes it feel lighter in practical applications, especially in molded ottoman designs.

For outdoor use, lighter polyethylene ottomans are easier to move and rearrange, but polypropylene offers better rigidity and resistance to prolonged UV exposure. Both materials are waterproof and low-maintenance, making them ideal for patio settings.

Ultimately, the choice depends on your priority: polyethylene for lightweight convenience or polypropylene for enhanced structural stability in windy conditions. Consider climate and usage frequency to make the best decision for your outdoor space.