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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.

Unitrex Lf20 – Replacement for PCTFE and Vespel SP-1 for many demanding applications?

Unitrex Lf20 – Replacement for PCTFE and Vespel SP-1 for many demanding applications?

Unitrex Lf20 – PTFE Filled PEEK

A newly released form of Filled PEEK is now available. This PEEK is filled with PTFE and is called Unitrex Lf20, and it is filled with 20% PTFE. This new grade of PTFE Filled PEEK plastic was originally produced by Nytef Plastics. It is an extruded thermoplastic that comes in both rod and sheet form. This grade has significantly improved properties over the standard unfilled grades of PEEK. The PTFE filler provides excellent wear properties and has a very low co-efficient of friction, which makes this a great material for sliding and wear applications, and is made to last for long periods of abuse. Unitrex Lf20 has great machinability and dimensionally stability. It has a wide range of uses in such fields as medical, semi-conductor, and aerospace seals, where standard PEEK is too rigid. These properties enable this material to replace Polyimide (Vespel®) and PCTFE (formerly Kel-F) in many applications of high chemical resistance and the ductility for use in seals. This Filled PEEK works extremely well in Medical, Semi-Conductor and Aerospace Seal applications.

PTFE Filled PEEK vs. PTFE Filled AcetalUnitrex LF20 - Mechetec PEEK

Comparable to Lf13 which is 13% PTFE filled Delrin® (Delrin® AF), which is also good for most of the same types of applications but cannot withstand the high temperatures than that of Unitrex Lf20. The PTFE Filled PEEK has a melting point of 650 degrees F while the PTFE Filled Delrin® – Unital® Lf13 has a melt point of 347 degrees F, making both materials high temperature plastics.

Because the Nytef Unitrex Lf20 is filled with PTFE (which has the lowest co-efficient of friction of any plastic), it is ideal for sliding and wear applications. It also has a kinetic and static friction resistance of 0.1 which makes it the perfect choice for jobs were heat from friction should not be generated and part longevity is critical. Unitrex Lf20 offers superior properties to many other plastics, such as high heat and chemical resistance but also great friction resistance along with improved properties to make it a great plastic for a wide spectrum of uses.

Why Change from Vespel SP-1 or PCTFE to Unitrex Lf20?

While this new PTFE Filled PEEK will not replace the Vespel SP-1 and PCTFE in all applications, it certainly will in many applications (see table for comparison). The main reason to make a change is, drum roll please, COST. The Unitrex Lf20 is up to 30% less expensive that the other materials. With similar and comparable properties, consider making the change.

Unitrex® Lf20 also exhibits a far superior chemical resistance to that of its Acetal counterpart due to PEEK having a far better range of chemical resistance to aqueous and organic environments as well as acids and alkalines. Acetal Copolymer tends to degrade when exposed to such chemicals like sulfuric acid and chlorine while PEEK only tends to be attacked by halogens and hydrocarbons such as in crude oils. For additional properties and to compare the Unitrex LF-20 to Dupont Vespel SP-1 and PCTFE see the table below. Here is a copy of the full data sheet on Nytef Unitrex Lf20.

Standard Properties Table

Properties TestMethod Unit UnitrexLF20 Nominal Value PCTFE(Kel-f) Nominal Value VespelSP-1 Nominal Value
Specific Gravity ASTM-D-792 1.42 2.1 – 2.14 1.43
Tensile Strength ASTM-D-638 psi 11,500 4,800 – 5,300 12,500
Tensile Modulus ASTM-D-638 psi 460,000 207,000
Flexural Modulus ASTM-D-790 psi 500,000 180,000 450,000
Rockwell Hardness ASTM-D-785 84-D 90-D 45 – 60 E
Melting Point DSC degress F 650 410 – 415 680+
Flammability UL 94 @ 3.0mm V-0 V-0 V-0
Kinetic Coef. of Friction ASTM-D-1894 0.1
Static Coef. of Friction ASTM-D-1894 0.1

For additional details on these and other materials, please contact us here or call us at 866-832-9315

Unitrex and Unital are registered trademarks of Polymer Industries
Delrin and Vespel are registered trademarks of E.I. Dupont