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Celcon® GC25A

Acetal (POM) Copolymer

Glass Fiber Reinforcement, 25%

Supplied by Ticona

The technical datasheet with complete property values for Celcon® GC25A is available to members of the Prospector Plastics Database.
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Product Description
Celcon® acetal copolymer grade GC25A is a glass coupled formulation containing 25% reinforced fiber glass. This grade offers excellent strength, stiffness and heat distortion temperature with lower mold shrinkage, minimum thermal expansion, excellent dimensional stability and good moldability.

Chemical abbreviation according to ISO 1043-1: POM
General  
Material Status 
  • Commercial: Active
Availability 
  • Latin America
  • North America
  • South America
Filler / Reinforcement 
  • Glass Fiber Reinforcement, 25% Filler by Weight
Features 
  • Chemically Coupled
  • Copolymer
  • Good Dimensional Stability
  • Good Moldability
  • Good Stiffness
  • Good Strength
  • Low Shrinkage
RoHS Compliance 
Automotive Specifications 
Forms 
  • Pellets
Processing Method 
  • Extrusion
  • Injection Molding
  • Profile Extrusion
Multi-Point Data 
  • Isochronous Stress vs. Strain (ISO 11403-1)
  • Isothermal Stress vs. Strain (ISO 11403-1)
  
Resin ID (ISO 1043)
  • POM
Physical
Nominal Value
Unit
Test Method
Specific Gravity      
--
 
 ASTM D792
--
g/cm³
 ISO 1183
Molding Shrinkage      
Flow
in/in
 ASTM D955
Across Flow
in/in
 ASTM D955
Across Flow
%
 ISO 294-4
Flow
%
 ISO 294-4
Water Absorption     ISO 62
Saturation, 73°F
%
  
Equilibrium, 73°F, 50% RH
%
  
Mechanical
Nominal Value
Unit
Test Method
Tensile Modulus
psi
 ISO 527-2/1A/1
Tensile Strength      
Break, -40°F
psi
 ASTM D638
Break, 73°F
psi
 ASTM D638
Break, 160°F
psi
 ASTM D638
Break
psi
 ISO 527-2/1A/5
Tensile Strain (Break)
%
 ISO 527-2/1A/5
Flexural Modulus      
73°F
psi
 ASTM D790
160°F
psi
 ASTM D790
220°F
psi
 ASTM D790
73°F
psi
 ISO 178
Flexural Strength (73°F)
psi
 ISO 178
Impact
Nominal Value
Unit
Test Method
Charpy Notched Impact Strength (73°F)
ft·lb/in²
 ISO 179/1eA
Charpy Unnotched Impact Strength     ISO 179/1eU
-22°F
ft·lb/in²
  
73°F
ft·lb/in²
  
Notched Izod Impact      
-40°F
ft·lb/in
 ASTM D256
73°F
ft·lb/in
 ASTM D256
180°F
ft·lb/in
 ASTM D256
73°F
ft·lb/in²
 ISO 180/1A
Thermal
Nominal Value
Unit
Test Method
Deflection Temperature Under Load      
264 psi, Unannealed
°F
 ASTM D648
264 psi, Unannealed
°F
 ISO 75-2/A
Vicat Softening Temperature
°F
 ISO 306/B50
Melting Temperature      
-- 2
°F
 ISO 11357-3
--
°F
 ASTM D3418
CLTE     ISO 11359-2
Flow
in/in/°F
  
Transverse
in/in/°F
  
Electrical
Nominal Value
Unit
Test Method
Volume Resistivity
ohm·cm
 ASTM D257
Related Terminology
This supplier and product may also be known by these terms: Celcom

Product names can be difficult to match. You may have searched any one of these terms to find this product: Celcon® GC25A, Celcon GC25A, Celcon® , Celcon, CelconGC25A, GC 25 A, GC25A, GC25, 25A, Acetal Copolymer, Acetal Copolymer, Acetal (POM) Copolymer, Acetal POM Copolymer, Acetal, pom, Ticona, AcetalPOMCopolymer, 25GC
Features
Features may also be described by the following terms: Good Moldability, Low Shrinkage, Good Stiffness, Good Strength, Good Dimensional Stability, Dimensionally Stable.
Automotive Specifications
This plastic material has approval for 12 automotive specifications from the following agencies (the number in parentheses shows the number of specifications for that agency): GM (1), CHRYSLER (2), VALEO (2), DELCO (2), DELCO PROD (1), DELPHI (1), FORD (2), CHEVROLET (1).
Injection
Nominal Value
Unit
 
Processing (Melt) Temp
°F
  
Mold Temperature
°F
  
Injection Notes
Standard reciprocating screw injection molding machines with a high compression screw (minimum 3:1 and preferably 4:1) and low back pressure (0.35 Mpa/50 PSI) are favored. Using a low compression screw (i.e.- general purpose 2:1 compression ratio) can result in unmelted particles and poor melt homogeneity. Using a high back pressure to make up for a low compression ratio may lead to excessive shear heating and deterioration of the Celcon material.

Melt temperature: preferred range 182-199 C (360-390 F) Melt temperature should never exceed 230 C (450 F).Mold surface temperature: preferred range 93-121 C (200-250 F) especially with wall thickness less than 1.5 mm (0.060 in.). May require mold temperature as high as 120 C (250 F) to reproduce mold surface or to assure minimal molded in stress. Wall thickness greater than 3 mm (1/8 in.) may use a cooler (65 C/150 F) mold surface temperature and wall thickness over 6 mm (1/4 in.) may use a cold mold surface down to 25 C (80 F). In general, mold surface temperatures lower than 82 C (180 F) may produce a hazy surface or a surface with flow lines, pits and other included defects.
Extrusion
Nominal Value
Unit
 
Melt Temperature
°F
  
Extrusion Notes
Standard extruders with a length to diameter ratio of at least 20:1 are recommended. The screw should be a high compression ratio of at least 3:1 and preferably 4:1 to assure good melting and uniform melt homogeneity. The design should be approximately 35% each for the feed and metering sections with the remaining 30% as transition zone
Notes
1Typical properties: these are not to be construed as specifications.
210°C/min
 
IDES
Copyright © 2012 IDES
The information presented on this datasheet was acquired by IDES from the producer of the material. IDES makes substantial efforts to assure the accuracy of this data. However, IDES assumes no responsibility for the data values and strongly encourages that upon final material selection, data points are validated with the material supplier.