Acetal & Delrin Ideal for Precision Close-Tolerance Industrial and Mechanical Components

Interstate Plastics | 330 Commerce Cir, Sacramento, CA 95815

Acetal copolymer plastic and Delrin® homopolymer plastic are mechanical thermoplastics used for precision close-tolerance industrial and mechanical components, featuring high strength and stiffness coupled with enhanced dimensional stability and ease of machining. As a semi-crystalline material, acetal is also characterized by a low coefficient of friction and good wear properties even in extremely cold environments.

Delrin Sheet

Delrin Sheet / Acetal comes in a variety of grades to enhance specific features including static dissipative and PTFE blend grades. General-purpose acetal is a copolymer plastic, while Delrin® has a homopolymer makeup.

Copolymer acetal plastic has no center-line porosity and performs better than standard Delrin® at elevated temperatures. It’s available in FDA compliant grades and features slightly increased resistance to chemicals, hot water, and high pH solutions versus Delrin® homopolymer acetal.

Homopolymer Delrin® acetal plastic features a higher crystallinity, providing better mechanical properties including tensile strength, creep resistance, and impact strength. Delrin® demonstrates high strength and stiffness in addition to good dimensional stability and very low moisture absorption. Delrin® can operate in wet environments with little effect on performance and may see increased part life. Its natural grade is FDA, NSF, and USDA compliant.


Physical Properties of Acetal & Delrin® Sheet *
Property                                              Acetal                                                      Delrin                                                                                                                                                                                         Copolymer                                           Homopolymer
Density (lb/in^3)                              0.051                                                         0.051
Water Absorption @24 Hours              0.2%                                                         0.2%
Tensile Strength (psi)                        9500                                                       11000
Tensile Modulus (psi)                    400,000                                                      450,000
Elongation at Break                             30%                                                        30%
Flexural Strength (psi)                     12000                                                       13000
Flexural Modulus (psi)                   400,000                                                  450,000
Compressive Strength (psi)             15000                                                       16000
Hardness, Rockwell                      M88/R120                                               M89/R122
Dielectric Strength (V/mil)               420                                                            450
*The values listed are typical and are meant only as a guide to aid in design. Field testing should be performed to find the actual values for your application.

Delrin® & Acetal Plastic Features
Consistent properties in wet or moist environments
Easy to machine to close tolerances
High strength and stiffness
Excellent dimensional stability
High crystallinity with centerline porosity
High tensile- and impact strength
Excellent creep resistance
Very low moisture absorption
Excellent electrical properties
FDA and USDA compliant grades available
Give us a call today for help finding the Delrin®/acetal plastic grade best suited for your application!

View the Press Release here.

Contact Name: Roger Milligan


Phone: +1-888-768-5759

Interstate Plastics Directory Listing 

Related Articles:

HDPE Marine Board | Interstate Plastics

Kydex® Plastic | Interstate Plastics

Twin wall polycarbonate sheet | Interstate Plastics