![]() ![]() Homopolymer acetal (Delrin®) is extremely stiff, with a flexural modulus of 14,300 psi, and provides superior wear and abrasion properties as well as excellent chemical resistance. Acetal – This stiff, high-strength, low-friction engineering plastic is easy to machine and can hold complex, tight tolerances.These properties are often needed in conjunction with one another in demanding applications. Stiffness of plastic is the ability of the material to distribute a load and resist deformation or deflection (functional failure). The strength of a plastic (typically referred to as tensile strength or ultimate strength) is how much stress a plastic can withstand without breaking when it is stretched or pulled (physical failure). This mixing of terms can result in confusion as to the difference between stiffness and strength. In addition to flexural modulus, the stiffness of plastics is sometimes referred to as flexural strength or tensile modulus. The higher the flexural modulus, the stiffer the material the lower the flexural modulus, the more flexible it is. The stiffness of plastics is described by flexural modulus (the ability of a material to bend), which is measured in pounds per square inch (psi). Stiffness is one of the key mechanical properties of plastic, along with strength, hardness, and toughness. ![]()
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