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This datasheet of CELCON GC25T from Ticona is provided by the international plastics database CAMPUS.
CAMPUS is organized by a group of leading international resin producers, who have agreed to test their material according to uniform conditions, based on ISO standards (ISO 10350, ISO 11403), in order to offer comparable data to the market.
You may contact the supplier for more information about this grade.
CELCON GC25T | POM-GF25 | Ticona
Product Texts
Celcon® GC25T is a 25% glass fiber coupled acetal copolymer grade. It
offers higher strength than the standard Celcon GC25-A. Celcon GC25T is
FDA approved.
Chemical abbreviation according to ISO 1043-1: POM
offers higher strength than the standard Celcon GC25-A. Celcon GC25T is
FDA approved.
Chemical abbreviation according to ISO 1043-1: POM
| Rheological properties | Value | Unit | Test Standard |
| Molding shrinkage (parallel) | 0.4 | % | ISO 294-4, 2577 |
| Molding shrinkage (normal) | 0.8 | % | ISO 294-4, 2577 |
| Mechanical properties | Value | Unit | Test Standard |
| Tensile Modulus | 8630 | MPa | ISO 527-1/-2 |
| Stress at break | 129 | MPa | ISO 527-1/-2 |
| Strain at break | 3 | % | ISO 527-1/-2 |
| Charpy impact strength (+23°C) | 50 | kJ/m² | ISO 179/1eU |
| Charpy impact strength (-30°C) | 55 | kJ/m² | ISO 179/1eU |
| Charpy notched impact strength (+23°C) | 8.7 | kJ/m² | ISO 179/1eA |
| Charpy notched impact strength (-30°C) | 7.2 | kJ/m² | ISO 179/1eA |
| Thermal properties | Value | Unit | Test Standard |
| Melting temperature (10°C/min) | 165 | °C | ISO 11357-1/-3 |
| Temp. of deflection under load (1.80 MPa) | 161 | °C | ISO 75-1/-2 |
| Vicat softening temperature (50°C/h 50N) | 161 | °C | ISO 306 |
| Coeff. of linear therm. expansion (parallel) | 27 | E-6/K | ISO 11359-1/-2 |
| Coeff. of linear therm. expansion (normal) | 125 | E-6/K | ISO 11359-1/-2 |
| Other properties | Value | Unit | Test Standard |
| Water absorption | 0.8 | % | Sim. to ISO 62 |
| Humidity absorption | 0.2 | % | Sim. to ISO 62 |
| Density | 1570 | kg/m³ | ISO 1183 |
| Test specimen production | Value | Unit | Test Standard |
| Processing conditions acc. ISO | 9990 | - | ISO ....-2 |
| Injection Molding, melt temperature | 205 | °C | ISO 294 |
| Injection Molding, mold temperature | 90 | °C | ISO 10724 |
| Injection Molding, injection velocity | 200 | mm/s | ISO 294 |
| Injection Molding, pressure at hold | 86 | MPa | ISO 294 |
Diagrams
Characteristics
Processing
Injection Molding, Profile Extrusion, Other Extrusion
Delivery form
Pellets
Regional Availability
Other text information
Injection molding
PREPROCESSING
Drying is generally not required because Celcon materials are not
hydroscopic nor are they degraded by moisture during processing.
Excessive moisture can lead to splay (silver streaking) in molded
parts. For better uniformity in molding especially when using regrind
or material that has been stored in containers open to the atmosphere,
recommended drying conditions are 80 C (180 F) for three hours.
Desiccant hopper dryers are not required. Max . water content = 0.35%.
PROCESSING
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
deterio ration 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) m old 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.
POSTPROCESSING
Postprocessing conditioning and moisturizing not required. It may be
necessary to fixture large or complicated parts with varying wall
thickness to prevent warpage while cooling to am bient temperature.
Drying is generally not required because Celcon materials are not
hydroscopic nor are they degraded by moisture during processing.
Excessive moisture can lead to splay (silver streaking) in molded
parts. For better uniformity in molding especially when using regrind
or material that has been stored in containers open to the atmosphere,
recommended drying conditions are 80 C (180 F) for three hours.
Desiccant hopper dryers are not required. Max . water content = 0.35%.
PROCESSING
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
deterio ration 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) m old 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.
POSTPROCESSING
Postprocessing conditioning and moisturizing not required. It may be
necessary to fixture large or complicated parts with varying wall
thickness to prevent warpage while cooling to am bient temperature.
Other extrusion
PREPROCESSING
Drying is generally not required because Celcon materials are not
hydroscopic nor are they degraded by moisture during processing.
Excessive moisture can cause surface defects. For better uniformity
especially when using regrind or material that has been stored in
containers open to the atmosphere, recommended drying is 3 hours at 80
C (180 F). Desiccant hopper dryers are not required. Max. moisture
content = 0.35%
PROCESSING
Stan dard 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.
Melt temperature 180-220 C (355-430F)
POSTPROCESSING
Postprocessing conditioning or moisturizing are not required. For thick
walled sections (>3mm or 1/8 in.), annealing is recommended to reduce
internal stresses.
Annealing temperature: 130-140 C (265-285 F)
Annealing time: 10 min/mm thickness
Drying is generally not required because Celcon materials are not
hydroscopic nor are they degraded by moisture during processing.
Excessive moisture can cause surface defects. For better uniformity
especially when using regrind or material that has been stored in
containers open to the atmosphere, recommended drying is 3 hours at 80
C (180 F). Desiccant hopper dryers are not required. Max. moisture
content = 0.35%
PROCESSING
Stan dard 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.
Melt temperature 180-220 C (355-430F)
POSTPROCESSING
Postprocessing conditioning or moisturizing are not required. For thick
walled sections (>3mm or 1/8 in.), annealing is recommended to reduce
internal stresses.
Annealing temperature: 130-140 C (265-285 F)
Annealing time: 10 min/mm thickness
Disclaimer
NOTICE TO USERS: Values shown are based on testing of laboratory test specimens and represent data that fall within the standard range of properties for natural material. These values alone do not represent a sufficient basis for any part design and are not intended for use in establishing maximum, minimum, or ranges of values for specification purposes. Colorants or other additives may cause significant variations in data values. Properties of molded parts can be influenced by a wide variety of factors including, but not limited to, material selection, additives, part design, processing conditions and environmental exposure. Any determination of the suitability of a particular material and part design for any use contemplated by the users and the manner of such use is the sole responsibility of the users, who must assure themselves that the material as subsequently processed meets the needs of their particular product or use. To the best of our knowledge, the information contained in this publication is accurate; however, we do not assume any liability whatsoever for the accuracy and completeness of such information. The information contained in this publication should not be construed as a promise or guarantee of specific properties of our products. It is the sole responsibility of the users to investigate whether any existing patents are infringed by the use of the materials mentioned in this publication. Moreover, there is a need to reduce human exposure to many materials to the lowest practical limits in view of possible adverse effects. To the extent that any hazards may have been mentioned in this publication, we neither suggest nor guarantee that such hazards are the only ones which exist. We recommend that persons intending to rely on any recommendation or to use any equipment, processing technique, or material mentioned in this publication should satisfy themselves that they can meet all applicable safety and health standards. We strongly recommend that users seek and adhere to the manufacturer's current instructions for handling each material they use, and to entrust the handling of such material to adequately trained personnel only. Please call the telephone numbers listed for additional technical information. Call Customer Services for the appropriate Materials Safety Data Sheets (MSDS) before attempting to process our products. The products mentioned herein are not intended for use in medical or dental implants.
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