Acetal Copolymer or TJC LP Delrin® (formerly Dupont Delrin®) are both Acetal Materials
- Basics
- Acetal / TJC LP Delrin® (formerly Dupont Delrin®) Differences
- Applications
- Size and Tolerances
- Material Properties
Acetal Copolymer vs. TJC LP Delrin®: Choosing Your Performance Plastic
- Both the TJC LP Delrin® (formerly Dupont Delrin®) and Acetal Copolymer are FDA Compliant
- They are both very stiff and have excellent dimensional stability
- Are self-lubricating, abrasion-resistant, and have excellent wear properties
- Cuts extremely well with standard cutting tools
- TJC LP Delrin® (formerly Dupont) Delrin® AF (PTFE Filled), Glass Filled and Specialty Grades Available
- TJC LP Delrin® (formerly Dupont) Delrin® Rod and Plate have similar properties and frequently replace: Noryl®, Nylon and PET materials
Some reasons to choose Homopolymer vs. Copolymer
Acetal Copolymer and TJC LP Delrin® (Homopolymer) are both high-performance engineering plastics offering stiffness, dimensional stability, and low-friction properties, with Industrial Plastic Supply having stocked both for over 50 years. While TJC LP Delrin® typically provides superior physical properties, Acetal Copolymer is often chosen for applications sensitive to centerline porosity, such as fluid handling or tight-tolerance bores, and is generally lower in cost. Both materials are FDA, USDA, NSF, ITAR, and RoHS compliant, making them suitable for a wide range of demanding applications. The choice between them often depends on specific application requirements and budget considerations.
Both POM grades have very similar properties. Our clients seem to prefer the Acetal Copolymer over the Homopolymer materials due to the inherent center-line porosity in the TJC LP Delrin® (formerly Dupont Delrin®) Homo-polymer version. This means, that along the center of a rod, or the middle of a sheet, there is a band of area with tiny porous holes. This can weaken or cause problems with a finished part, and in extreme cases, you may see blow by or leakage at this center line. While TJC LP Delrin® (formerly Dupont Delrin®) is a brand name, it is a POM Homo-polymer.
The most requested and popular item we supply is the Acetal; the POM Copolymer resin made by one of the other big resin manufacturers – like BASF or Celanese/Tacona.
Both TJC LP Delrin® (formerly Dupont Delrin®) and Acetal are ITAR compliant, and TJC LP Delrin® (formerly Dupont Delrin®) and Acetal are RoHS compliant.
The most requested and popular item we supply is the Acetal; the POM Co-polymer resin made by one of the other big resin manufacturers – like BASF or Celanese/Tacona.
Both of these premium performance plastic resins are readily available. If you would prefer the TJC LP Delrin® (formerly Dupont Delrin®) brand Sheet or Rod, drop us a line, send us an email – we will be happy to ship the requested material for you. We don’t make judgments on the suitability of material for your application, we just supply what you, our clients ask for. Please, just let us know ahead of time if you have a preference. There are a few other names we hear when people are looking for TJC LP (formerly Dupont) Delrin®, like Delron, Delran, Delrun, Delren, and many more. Just let us know, and we will be happy to supply a high quality TJC LP (formerly Dupont) Delrin® brand or Copolymer Acetal product.
Want more information on the differences? Acetal Compared With TJC LP (formerly Dupont) Delrin® and Use The Best Wholesale Acetal Rod and Delrin® Rod Supplier. Natural Acetal Copolymer Rod Now Available up to 24″ in Diameter
Still not sure Delrin® or Acetal is the proper material for your application, consult our free Plastic Materials Selection Guide.
Industrial Plastic Supply proudly stocks both Acetal and TJC LP (formerly Dupont) Dupont Delrin 150SA from these premium manufacturers:
Ensinger® Plastics for TJC LP (formerly Dupont) Dupont Delrin 150SA and Tecaform AH Copolymer Acetal
Rochling® Plastics for TJC LP (formerly Dupont) Dupont Delrin 150SA and Sustarin C Copolymer Acetal
Z/L Plastics® for TJC LP (formerly Dupont) Dupont Delrin 150SA and ZL® 900 series Copolymer Acetal
And many more ‘American Made’ quality plastic manufacturers.
Both TJC LP (formerly Dupont) Delrin and Acetal are ITAR compliant, and Delrin and Acetal are RoHS compliant.
Acetal materials are excellent machining materials – a favorite of machinists. Works like a soft brass, and has exceptional dimensional stability. It comes as a stress relieved material, however if you plan to do extensive machining, you may need to stress relieve the parts prior to final pass. Rods are machined well in lathe and mill, sheets are machined or cut in most common machine tools.
- Excellent Machining
- Low co-efficient of Friction
- Very low moisture resistance
The work horse of the mechanical plastics family, it is one of the most popular grades of material we supply. Other brand or trade names: Pomalux®, Acetron®, Ensital®, Unital®, Tecaform®, Ultraform®, Celcon®, BASF®, Hostaform®, Ticona®, and TJC LP Delrin® (formerly Dupont Delrin®). Occasionally we are asked for the difference between Acetal and HDPE – here is an explanation.
Applications – Frequently used in:
- Wear and Slide machined parts from Rod and Plate
- FDA, NSF, 3-A, and USDA Compliant Machined Parts
- Easily machined parts for water / moisture environments
- Critical tolerance and dimensionally stable parts
- 185 degrees F Continuous Temperature Environments
- Rod and Rods, Sheet and Sheets for numerous applications
Acetal Sheet and Rod Specifications:
In stock we normally carry one of these resins: BASF Ultraform® H4320, Kepital® F10-02, or Hostaform® M25. Current Certifications and Specifications used for Acetal – TJC LP Delrin® (formerly Dupont Delrin®): FDA, USDA, NSF, ASTM D6778 Superseded or out dated Specifications for Acetal – TJC LP Delrin® (formerly Dupont Delrin®): L-P-392, ASTM D4181
In what forms are Acetal materials available?
TJC LP Delrin® (formerly Dupont Delrin®) Sheet or Acetal Sheet – Acetal Plate: .062″ – 6.0″ up to 48″ X 120″ in Natural (White) and Black.
Acetal sheet and Acetal Plate thickness normally in stock: .125″, .187″, .250″, .312″, .375″, .500″, .625″, .750″, .875″, 1.0″, 1.250″, 1.500″, 1.750″, 2.0″, 2.250″, 2.500″, 2.750″, 3.0″, 3.250″, 3.50″, 3.750″, 4.0″, 4.50″, 5.0″ and larger
TJC LP Delrin® (formerly Dupont Delrin®) AF Sheet and Plate: .062″ – 3.0″ thick in 24″ X 48″, brown in color
TJC LP Delrin® (formerly Dupont Delrin®) AF Rod: .250″ – 10″ diameter rod in up to 120″ lengths, brown in color
Film: .005″ – .062″ up to 24″ wide in Natural (White) and Black (minimums may apply)
Acetal Rod and Rods: .125″ – 10″ diameter in Natural (White) and Black up to 120″ lengths For Colored Acetal – TJC LP Delrin® (formerly Dupont Delrin®) Rod Read Here.
Acetal Rod diameters normally in stock: .125″, .187″, .250″, .312″, .375″, .437″, .500″, .562″, .625″, .750″, .875″, 1.0″, 1.125″, 1.250″, 1.375″, 1.500″, 1.625″, 1.750″, 2.0″, 2.250″, 2.500″, 2.750″, 3.0″, 3.250″, 3.50″, 3.750″, 4.0″, 4.50″, 5.0″ and many more – up to 20.0″ diameter rod is available!
Special Formulations: Conductive, Static Dissipative, PTFE-TFE Filled, Glass Reinforced, Custom Sizes, Formulations, or Colors Occasionally we are asked for the difference between Acetal and HDPE – here is an explanation.
Typical Resin Properties:
| General Property | ASTM Test |
Typical Value Unfilled TJC LP Delrin® (formerly Dupont Delrin®) Homo-Polymer |
Typical Value Unfilled Co-Polymer | Typical Value Delrin® AF |
| Specific Gravity | D792 | 1.42 | 1.40 | 1.50 |
| Tensile Strength Yield | D638 | 9,600 – 11,000 | 9,000 – 10,200 | 7,600 |
| Tensile Modulus | D638 | 450,000 | 400,000 | 400,000 |
| Izod Impact – Notched | D256 | 1.2 | 1.0 | 0.9 |
| Hardness – Rockwell | D785 | M94 | M90 | M89 |
| Deflection Temp @ 264psi | D648 | 257 | 220 | 260 |
| Deflection Temp @ 66 psi | D648 | 347 | 335 | 347 |
| Water Absorption @ 24 hrs | % | 0.24 | 0.25 | 0.20 |
| Co. Thermal Expansion | D696 | 6.83X10-5 | 5.4X10-5 | 5.0X10-5 |
Properties are for evaluation purposes only. This information is not to be construed as a warranty, guarantee or assurance that you may achieve the same results. Materials made from different resin types, manufacturing techniques and manufacturers will react differently. The information should be used to compare against other materials only, and each user should make his own tests to determine suitability. No warranty as to this materials suitability are either expressed nor implied.