Polyoxymethylene (POM), also known as acetal, polyacetal, and polyformaldehyde, is an engineering thermoplastic used in precision parts requiring high stiffness, low friction, and excellent dimensional stability.
What is a polyacetals?
Polyacetals are crystalline polymers that exhibit rigidity, high strength, solvent resistance, fatigue resistance, toughness, self-lubricity, and cold-flow resistance. They also exhibit a tendency to thermally depolymerize and, hence, are difficult to flame retard.
Where is acetal used?
Acetal is one of the most widely used plastics in the manufacturing sector. Its applications include engineering components that require high-performance, like those in the electronics and the automotive sectors. These include gear wheels, fasteners, lock systems, etc.
What products are made from acetal?
Common Applications
- Aerospace.
- Automotive.
- Bearings and Bushings.
- Bus and Rail.
- Chemical Processing.
- Food and Beverage Preparation and Processing.
- Gaskets and Seals.
- Gears.
What is Delrin plastic used for?
Delrin Plastic 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 POM food safe?
Is POM Plastic Safe? POM plastics are safe, and they’re approved by the FDA and USDA as a food grade product.
Which is harder Delrin or UHMW?
Delrin is stiffer and stronger in unfilled form, has shorter molding cycles, easy to machine, low moisture absorption, and better surface finish.
What is acetal resin used for?
Acetal resin is used for mechanical parts (gears, bushings), pipes, automotive parts, communication equipment, videocassettes, and cosmetic containers.
Is Delrin self lubricating?
Well-Known Member. delrin is self lubricating but if you want to grease it go ahead. delrin is one of the most chemically resistant plastics there is. no grease will hurt it.
Is polyoxymethylene flexible?
POM is a strong and flexible material that shows a great resistance to creep, outstanding dimensional stability and impressive impact strength even at very low temperature conditions. With regard to grades, POM is either copolymers or homopolymers.
Can you paint acetal?
Delrin (Polyoxymethylene, Acetal & any of a thousand different names) plastic, is a difficult plastic to paint. Well not difficult to paint, difficult to keep paint on. It is designed to be stain resistant, and therefore dosen’t like to “hold” paint.
Can you dye POM plastic?
If you need POM in a color other than black and natural, it has been reported to dye well. Just like with nylon, any regular technique for dying should work and give a good, if subdued, color.Some dyes may have adverse effects over time on the performance of the plastic.
What is PP material?
Polypropylene (PP) is a thermoplastic “addition polymer” made from the combination of propylene monomers. It is used in a variety of applications to include packaging for consumer products, plastic parts for various industries including the automotive industry, special devices like living hinges, and textiles.
How tough is Delrin?
Acetal copolymer tends to have a tensile strength of 9,500 psi, which is impressive for a polymer. Delrin® tops out at 11,000 psi. This allows a structure made from Delrin® to withstand an extra 1,500 psi of force without failing.
Can Delrin be threaded?
Delrin® homopolymer is used to make screws, hex nuts, threaded rod, set screws, as well as many other fasteners and custom parts.
Can you machine Delrin?
Delrin is suitable for machining processes like milling and turning, and is supplied in sheets or extruded bars for this purpose. The material can also be cut with a laser cutter, and its granulated form is used for injection molding and plastic extrusion.
Is POM toxic?
Results: POM brackets produce toxic formaldehyde gas whether heated or mechanically abraded. Patients who wear these brackets are being exposed to, at the very least, a potential irritant.
Is Delrin same as POM?
Acetal is the common name for a family of thermoplastics with the chemical name “PolyOxyMethylene”, or POM. Acetal is available in two general types of resins: Copolymer acetal (POM-C), and homopolymer acetal (POM-H); commonly called Delrin®.
Can POM plastic be glued?
POM is extremely solid, hard and stiff in a wide temperature range.POM has a low surface energy of ~36mN/m and therefore is typically very difficult to bond. Surface treatment will improve adhesion and bonding results significantly.
Does Delrin absorb water?
Delrin® Homopolymer
Delrin® is a family of Acetal Homopolymer whose properties include low water absorption and superior creep resistance, tensile strength, and fatigue endurance.
Are there different grades of UHMW?
UHMW Grades– Several grades of UHMW are available, including reprocessed, enhanced bearing and wear, and FDA compliant.
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