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Acetal Copolymer

Acetal Copolymer

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Acetal Materials

Acetal Copolymer / Dupont Delrin® 150SA Homopolymer

Which Acetal material should you use? (POM)

  • Both Acetal Copolymer and Delrin® 150SA Homopolymer are FDA Compliant
  • Both are very stiff and have excellent dimensional stability
  • Are Self Lubricating, Abrasion Resistance, and Excellent Wear properties
  • Available in Natural, Black and Blue. Custom colors also available.
  • Cuts extremely well with standard cutting tools
  • Delrin® AF (PTFE Filled), Glass Filled, and Specialty Grades Available
  • Delrin® 150SA Homopolymer have similar properties and frequently replace: Noryl®Nylon®, and PET or PBT materials
  • Acetal and Delrin® are High Tech Performance Plastics

Some reasons to choose Homopolymer vs. Copolymer

Both Acetal (POM) grades have very similar properties. Our clients seem to prefer the Dupont brand name Homopolymer materials because of the superior physical properties. The issues that lead clients to the Copolymer is a slightly lower cost, and the minor inherent center-line porosity in the Delrin® 150SA Homopolymer grade.

Dupont™ Delrin ® is a popular acetal homopolymer brand name and the most commonly used acetal homopolymer.

The Delrin® 150SA is a brand name of Dupont, and it is often referred to as POM-H or Acetal Homopolymer. Common brand or trade names for extruded Acetal sheet and rod materials include: Tecaform® AH, SUSTARIN® C, ZL® 900-C, Pomalux®, Unital®, Mechatec Acetal®, Acetron® and many more. This excellent mechanical plastic material is also referred to as: Acetal Copolymer rod, Copolymer Acetal rod, Copolymer Plastic Rod, Acetal Copolymer vs Acetal Homopolymer, Homopolymer Acetal rod, Acetal Homopolymer rod, and many others.

Specializing in Wholesale Acetal and Delrin Engineering Plastics, Mechanical Plastics and High Performance Plastics

**Note:  Delrin® is a registered Trademark of Dupont

**See also: Alignable Acetal – Delrin Page

 

10-inch-Black-Acetal-Rod

Why you should use Acetal/ Delrin®

  • Both the Dupont Delrin® and Acetal Copolymer are FDA Compliant
  • They are very stiff and have excellent dimensional stability
  • Are self-lubricating, abrasion-resistant, and have excellent wear properties
  • Cuts extremely well with standard cutting tools
  • Delrin® AF (PTFE Filled), Glass Filled and Specialty Grades Available
  • Delrin® Rod and Plate have similar properties and frequently replace: Noryl®Nylon and PET materials

Some reasons to choose Homopolymer vs. Copolymer

Both POM grades have very similar properties. Our clients seem to prefer the Acetal over the Homopolymer materials due to the inherent center-line porosity in the 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 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 Delrin and Acetal are ITAR compliant, and 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 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 Delrin®, like Delron, Delran, Delrun, Delren, and many more. Just let us know, and we will be happy to supply a high quality Delrin® brand or Copolymer Acetal product.

Want more information on the differences?  Acetal Compared With 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 Acetal and Dupont Delrin 150SA from these premium manufacturers:

Ensinger® Plastics for Dupont Delrin 150SA and Tecaform AH Copolymer Acetal

Rochling® Plastics for Dupont Delrin 150SA and Sustarin C Copolymer Acetal

Z/L Plastics® for Dupont Delrin 150SA and ZL® 900 series Copolymer Acetal

And many more ‘American Made’ quality plastic manufacturers.

Both 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 Dupont Delrin®. Occasionally we are asked for the difference between Acetal and HDPE – here is an explanationApplications – 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 – Delrin®: FDA, USDA, NSF, ASTM D6778 Superseded or out dated Specifications for Acetal – Delrin®: L-P-392, ASTM D4181

Materials Available As

Delrin® Sheet – Delrin®Plate 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

Delrin® AF Sheet and Plate: .062″ – 3.0″ thick in 24″ X 48″, brown in color

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 – 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 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
Acetal Copolymer Sheet and Rod

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.

Are HDPE sheet and Homopolymer Acetal Sheet The Same Materials?

Are HDPE sheet and Homopolymer Acetal Sheet The Same Materials?

Is HDPE Sheet and Acetal Homopolymer Sheet the same?

Here is another popular question asked by our clients. Is HDPE the same as Acetal Copolymer  / Delrin Acetal Homopolymer?
No, they are two totally different materials. Although the natural color of both is a milky white to opaque white, and they do look a bit similar, they are not. (HDPE is milky white to almost translucent depending on thickness, and the Acetal materials are a more opaque white to slightly milky – once again depending on thickness . See picture below of .500″ thick samples of HDPE and Acetal sheets)HDPE compared to Delrin Acetal Homopolymer sheet

HDPE and Acetal – Some Differences

The HDPE sheet and rod is a softer material, and is commonly known for its FDA certification and used in numerous food applications, such as: one gallon milk jugs, cutting boards, colored water glasses/cups, and many, many more. While it can be machined, because it is a bit softer and lighter, the tolerances it can be machined to are not very tight. It is not bondable, so it makes a great non-stick surface for sticky foods and adhesives.


The Acetal Copolymer and the premium Delrin® Acetal Homopolymer also have FDA certification, and are used heavily in the food processing industry. This material is a more mechanical material and is used in bearing and wear applications, cams, feeder screws, etc. This material is can be machined to tight tolerances, and will wear for long periods without lubrication. Due to its exceptional wear properties, it is not bondable, thus requiring mechanical fastening or threads to assemble. It has a very low water absorption, and you will find it in your toilet tank as the white moving parts in the filler mechanism. It is an extremely popular material for machinists, as it works much like soft brass.


While HDPE Sheet and Acetal Sheet look similar, they perform quite a bit differently.

While both materials are FDA approved, are machinable and can be used to make rigid wear resistant parts, they are two different resins and have drastically different physical properties. Another major difference is in the weight of these items, HDPE sheet and rod material weighs about 35% less than the Acetal sheet and rod material. Please check the data sheets for more information to assist in proper material selection. Acetal Data Sheet and HDPE Sheet Data

Acetal is commonly known as: Delrin Homopolymer Acetal, Tecaform AH,Ensital, Unital, Pomalux, Ultraform and many more.

HDPE is also known as: Ultraethylux, Densetec, Polystone G, Fortiflex, Versadur, Hostalen, and many more.

Contact us for more details on the HDPE and Acetal families of plastic materials, e-mail us or call 866-832-9315
Topic: HDPE sheet and Delrin Sheet (Acetal Sheet)

Colored Acetal Copolymer – Dupont Delrin 150SA Homopolymer Rod

Colored Acetal Copolymer – Dupont Delrin 150SA Homopolymer Rod

Can we get colored Acetal Copolymer – Delrin® Homopolymer Rod?

We get this question frequently.

The easy answer is yes, however, the most common available colors are Black and Natural (white in color). But to continue the thought, we have several manufacturers that run ‘Medical’ grades of Acetal Copolymer as well as Acetal Homopolymer (ie: Dupont Delrin® 150SA Homopolymer Acetal) in several colors. Comparing Dupont Delrin to Acetal Copolymer These materials are special run, but can frequently purchase by the standard length without a custom run. The biggest factor may be the price. The colored version of Acetal Copolymer – Delrin Homopolymer Acetal materials are dramatically more expensive.

Colored Acetal Copolymer – Dupont Delrin® Homopolymer 150SA Rod

While price is a factor, the benefits may out weigh the cost. Many of our clients use these colored rods to help differentiate their product from their competition. With colors that can come close to a logo color or match a machine, these advantages are clearly visible. Having a special color available to machine small to medium runs of your product can save you thousands over molding a new part for trials.

What colors can I get in Acetal Copolymer or Dupont Delrin® 150SA Homopolymer Acetal Rod? The range is a bit limited, but does include: brown, dark blue, dark green, gray, light blue, light green, red, rust and yellow (and of course Natural and Black). For details on the properties of these materials click here: Acetal Copolymer and Dupont Delrin® 150SA Homopolymer Acetal. Dupont™ Delrin® is a popular acetal homopolymer brand name and the most commonly used acetal homopolymer.

For specifics on your requirement, please contact us for availability and pricing. Email or call 866-832-9315

We can supply both the Acetal Copolymer and the premium Dupont Delrin 150SA Homopolymer acetal from our premium suppliers: Ensinger Plastics, Z/L Plastics, Rochling Engineered Plastics and others in special formulations.

Looking for the differences between Acetal Copolymer and Dupont Delrin® 150SA Homopolymer Acetal materials, click here.

**Note:  Delrin® is a registered Trademark of Dupont