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It starts with a plastic known as styrene. Liquid or soft styrene has air or gasses forced through it, causing it to expand or foam up. Styrene+ foam= styrofoam. The material gets lighter as it foams up, and later solidifies.

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βˆ™ 14y ago
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βˆ™ 6mo ago

Foam balls are typically made of expandable polystyrene (EPS) or polyurethane foam. These materials are lightweight, flexible, and easily molded into different shapes, making them ideal for crafting, packaging, and sports equipment.

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βˆ™ 13y ago

foam is a substance that is formed by trapping many gaseous bubbles in a liquid or solid.

A foam is normally an extremely complex system consisting of polydisperse gas bubbles separated by draining films.

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βˆ™ 10y ago

Polystyrene foam is made from oil that goes through a process called polymerization. In this process, the tiny polystyrene beads expand when steam-heated, rest during a mature period to reach equilibrium, and are heated one more time in a mold.

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βˆ™ 11y ago

I think the answer you are looking for is called Polystyrene.

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βˆ™ 15y ago

craft foam is made of foam and colouring!

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βˆ™ 13y ago

Styrafoam is made out of stryafoam

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Q: What are foam balls made of?
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