ABSTRACT
Basically, all thermoplastic materials should be suitable for thermoforming processes. Such materials, when heated, will exhibit a reduction in their modulus of elasticity, their stiffness, and their load-bearing capacity. To understand these relationships it becomes necessary to know how temperature changes affect the physical properties of plastics. We are too much accustomed to assume that our everyday materials, such as wood, concrete, glass, metals, and textiles, remain unchanged between 0 and 200°F.
