Acetal Sheet Description This is black acetal. It is opaque and has a gloss finish. What is acetal? Acetal, also know as polyoxymethylene (POM), is an engineered polymer made by combining alcohols with aldehydes and ketones and and then removing water. It is stiff, strong, and has relatively low friction. It has very good dimensional stability with varying temperature and humidity. The polymer is semi-crystalline, which means it doesn’t soften much until the melting point is reached (around 350F). This ability to withstand high temperatures makes acetal ideal for use in fabricating automotive, medical and electronic components. Acetal is chemically resistant and can withstand exposure to acidic or basic solvents. If you are frustrated by the brittleness of acrylic, or need an alternative to metals, try acetal. It’s super tough stuff that is easily cut by sawing, milling, drilling, and other conventional machining operations. Acetal sheets are not film or paper masked. As such, surface imperfections from handling may be present. FOR CUSTOM SIZES, contact us at [email protected]. Laser Cutting Acetal can be laser cut as well. However, you should definitely verify that you can cut acetal on your laser cutter. It’s finicky and prone to burning, and most shared maker labs do not allow it to be cut on the lab machines. Note this important disclaimer: the edges are generally fine for most purposes, however they are not as beautiful as with acrylic. Acrylic is the perfect laser cuttable material. Acetal is not quite as perfect. So, you’ll get a bit of a melted radius on one side and the cut is not as perfectly glassy as with acrylic. If you need super precision, you should allow for some filing and sanding. Uses and Applications Laser Cutting CNC Machining Injection Molding and Extrusion Machining Ideal for gears, screws, busing, fittings and bearings Commonly used in electrical components, automotive and medical parts Easily machinable by drilling, milling, turning, sawing or tapping Specifications and Dimensions Available in 1/8 and 1/4 nominal thicknesses. Cut to tolerances of +0in/-0.188in 0% light transmission. Lightweight but strong and durable Dimensionally stable Sizes Available 12x12 12x24 24x24 24x36
