What are the properties of acetal?
As a semi-crystalline material, acetal is characterized by a low coefficient of friction and good wear, high strength, stiffness, dimensional stability, very low moisture absorption, good wear and abrasion resistance and a wide range chemical resistance.
What is the difference between Delrin and acetal?
Delrin® is an acetal homopolymer and has a uniform backbone with a larger crystalline block structure than acetal copolymers providing better chemical bonding. As a result, Delrin® is the stiffest and strongest unreinforced technical engineering polymer available.
What is Delrin material used for?
Delrin is Ideal for Industrial Applications Parts exposed to a moist or wet environment, such as pump and valve components, are especially appropriate. Other common uses include gears, bearings, bushings, rollers, fittings, and electrical insulator parts.
Is acetal UV resistant?
Polyoxymethylene is made in both homopolymer and copolymer forms, which are not very different from each other. They have poor resistance to UV and generally to alkalis and acids. …
Is Delrin stronger than polycarbonate?
Delrin is hard and slick. It’s used for glides, sacrificial wear-pads, and other motion applications. Polycarbonate is high heat-deflection-temp and tough. It’s used in higher-temp applications (eg inside cars) and where impact fracture is unacceptable.
Is Delrin stronger than aluminum?
Of course 7075 aluminum is much stronger than delrin. The tensile strength of 7075 is at least 55000 psi depending on temper and what not. Delrin has a 9000 psi tensile strength.
Is acrylic UV resistant?
Acrylic is inherently UV resistant with as little as 3% degradation outdoors over a 10-year period.
Does HDPE block UV?
HDPE is one of the world’s most commonly used plastics, is incredibly safe, it emits no harmful emissions, and does not absorb moisture. Typical characteristics of this HDPE material: UV resistance.
Is Delrin a good bearing material?
4) Acetal (Delrin): Delrin is a popular material for inexpensive bearings in a wide variety of automotive, appliance, and industrial applications. Delrin is particularly useful in wet environments because of its stability and resistance to wet abrasion.
Why are acetal and delrin used as adhesives?
Bonding acetal to dissimilar materials is a particular problem due to it’s very high thermal expansion coefficient–seven times that of steel. As a consequence the adhesive bond joint must be designed to accommodate the expansion/contraction differential between materials to avoid bond failure.
What are the properties of the plastic Delrin?
Delrin® is a crystalline plastic that offers an excellent balance of properties that bridge the gap between metals and plastics. Delrin® possesses high tensile strength, creep resistance and toughness. It also exhibits low moisture absorption. It is chemically resistant to hydrocarbons, solvents and neutral chemicals.
How big is a pellet of Delrin acetal resin?
Product Form and Packaging. Delrin® acetal resin is supplied as spherical pellets, approximately 2.5 mm (0.1 in) in diameter or cylindrical pellets, 3 mm (0.125 in) in diameter by 2.3 mm (0.09 in) in length.
What’s the difference between delrin and acetal copolymer?
I thought they were the same, I ended up being quite wrong. Acetal refers to the pattern and shape of the molecule that makes up its building blocks. Delrin, is an acetal homopolymer unless otherwise specified by Dupont. When you buy acetal without a trade name attached, you are usually purchasing acetal copolymer.