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UNITAL® Acetal (polyoxy-methylene) offers design engineers a superior blend of strength, stiffness, lubricity, and dimensional stability. These properties, along with inherent machining ease, have made UNITAL one of the most widely used engineering grade thermoplastics. To meet specific application configurations and to maximize production efficiencies, Nytef Plastics offers a broad array of UNITAL Acetal stock shapes. These materials include both homopolymer (DELRIN®) and copolymer unfilled grades as well as PTFE-filled grades for enhanced wear resistance. Nytef also offers an electrically conductive grade of UNITAL Acetal that is used in the micro-electronics industry to dissipate static electric charges.

Unfilled Products:
UNITAL® H Delrin 150 Acetal Homopolymer (POM)--Excellent toughness, FDA Compliant
UNITAL® H BK Delrin Black 150 Acetal Homopolymer - FDA Compliant material available
UNITAL® C Acetal Copolymer (POM), Best machinability, improved chemical resistance, FDA Compliant
UNITAL® C BK Acetal Black Copolymer - FDA Compliant material available
 
Enhanced Wear Products:
UNITAL® Lf13 Acetal Homopolymer, 13% PTFE Powder filled – Low friction, FDA Compliant, brown color
DELRIN AF
BLEND
Delrin Homopolymer, 13% PTFE Fiber Filled Delrin AF Blend – Low friction, brown color
DELRIN DE-588 Delrin 100 AF, fully certified for U.S. Navy use, brown color
Other Acetal Products:
UNITAL® esd Acetal Copolymer, Electro-Static Dissipative - IDP filler/non-carbon, 1010-1012 ohms/sq., beige color

 

  • 185° F Continuous Use Temperature
  • High Strength and Stiffness
  • Excellent Toughness
  • Superior Wear Resistance
  • Low Moisture Absorption
  • Easily Machined and Fabricated

  • Food Processing
  • Material Handling Equipment
  • Fluid Handling
  • Electronics Manufacturing
  • Automotive

  • Pistons
  • Valves
  • Manifolds
  • Food Product Forming Dies
  • Timing Screws
  • Scraper Blades
  • Wear Strips
  • Pump Components
  • Gears
  • Bushings and Bearings
  • Electrical Components


 

Property
Test Method
Units
UNITAL H
and H BK
UNITAL C
and C BK
UNITAL LF13
DELRIN AF Blend
UNITAL esd
   
Unfilled
Homo-polymer
Unfilled
Copolymer
13% PTFE Powder
13% PTFE Fiber
Static dissipative acetal

Mechanical 

Specific Gravity
ASTM-D792
---
1.42
1.40
1.48
1.50
1.33
Tensile Strength
ASTM-D638
psi
9,600-11,000
9,000-10,200
8,000-8,500
7,600-8,000
6,600
Tensile Elongation
ASTM-D638
%
30-50
30-60
15-30
15-30
45
Tensile Modulus of Elasticity
ASTM-D638
psi
450,000
400,000
600,000
550,000
 
Flexural Strength
ASTM-D790
psi
14,300
12,000
13,500
12,500 
7,000
Flexural Modulus of Elasticity
ASTM-D790
psi
470,000
366,000
410,000
400,000
210,000
Compressive Strength
ASTM-D695
psi
16,000
15,000
15,500
16,000 
 
Izod Notched Impact
ASTM-D256
ft.-lb./in.
1.2
1.0
0.8
0.9
2.0
Rockwell Hardness
ASTM-D785
M or R scale
M94
M90
M89
M89
 
Thermal    
Coef. of Linear Thermal Expansion
ASTM-D696
in./in./deg F
6.8 x 10-5
5.4 x 10 -5
5.2 x 10 -5
5.0 x 10 -5
6.5 x 10 -5
Max. Continuous Use Temp.
Nytef std.
°F
185
185
185
185
185
Heat Deflection Temp. @ 264 psi
ASTM-D648
°F
257
220
235
260
141
Melting Point
ASTM-D3418
°F
347
335
347
347
 
Electrical
Dielectric Strength-Short Term
ASTM-D149
volts/mil
500
500
400
400
 
Dielectric Constant @ 60 Hz
ASTM-D150
  
3.7
3.8
3.1
3.1
 
Dielectric Constant @ 106 Hz
ASTM-D150
  
3.7
3.8
3.1
3.1
 
Dissipation Factor @ 60 Hz
ASTM-D150
  
0.005
0.003
0.009
0.009
 
Volume Resistivity
ASTM-D257
ohm-cm
1015
1015
1015
1015
109 - 10"
Miscellaneous
Water Absorption/24 hrs.
ASTM-D570
% weight
0.25
0.25
0.23
0.20
0.20
Water Absorption @ Saturation
ASTM-D570
% weight
0.90
0.8
0.8
0.72
2.5
Flammability
UL-94
 
HB
HB
HB
HB
HB
Dynamic Coefficient of Friction
 
 
0.20
0.21
0.16
0.17
 
Agency Approvals
FDA
 
  
Yes
Yes
Yes
No
No
USDA  
Yes
Yes
Yes
No
No
NSF
 
 
Yes
Yes
No
No
No
3-A Dairy
 
 
Yes
Yes
Yes
Yes
No
 
Acetal  Diameters (Rod) Thicknesses (Plate) Other Shapes
Unital H ® Delrin® 150 Homopolymer
0.25" - 6.0" 0.031" - 3.0" Hex & Square Rod
Unital H BK Black Delrin 150 Homopolymer
 
0.25" - 6.0" 0.031" - 2.0" Hex & Square Rod
Unital C Copolymer
 
0.25" - 12.0" 0.188" - 5.0" Hex & Square Rod
Unital CBK Black Copolymer
 
0.25" - 8.0" 0.188" - 4.0" Hex & Square Rod
Unital Lf13 13% PTFE Powder Filled Homopolymer
 
0.25" - 6.0"
0.250" - 3.0"
Hex & Square Rod
Delrin AF 13% PTFE Fiber Filled Homopolymer
 
0.25" - 6.0" 0.031" - 3.0"  
Delrin DE-588 U.S. Navy use only
 
1.0" - 6.0" 0.375" - 2.0" Tubular Bar
Unital esd Static Dissipative Copolymer
 
0.25" - 2.5" 0.250" - 2.0"  

Click here for more detailed size and tolerance information