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This is the free Material Data Center Datasheet of CELCON® GC25T - POM-GF25 - Celanese
Material Data Center offers the following functions for CELCON® GC25T:
unit conversion, PDF datasheet print, comparison with other plastics, snap fit calculation, beam deflection calculation, CAE Interfaces
unit conversion, PDF datasheet print, comparison with other plastics, snap fit calculation, beam deflection calculation, CAE Interfaces
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| Caratteristiche Fisiche | Valore | Unitá | Norma del test | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ISO Data | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ritiro di stampaggio, parallelo | 0.4 | % | ISO 294-4, 2577 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ritiro di stampaggio, perpendicolare | 0.8 | % | ISO 294-4, 2577 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Proprietà Meccaniche | Valore | Unitá | Norma del test | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ISO Data | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Modulo a trazione | 8630 | MPa | ISO 527 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Carico unitario a rottura | 129 | MPa | ISO 527 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Deformazione a rottura | 3 | % | ISO 527 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Resistenza all'urto Charpy, +23°C | 50 | kJ/m² | ISO 179/1eU | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Resistenza all'urto Charpy, -30°C | 55 | kJ/m² | ISO 179/1eU | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Resistenzia all'urto Charpy con intaglio, +23°C | 8.7 | kJ/m² | ISO 179/1eA | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Resistenzia all'urto Charpy con intaglio, -30°C | 7.2 | kJ/m² | ISO 179/1eA | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Proprietà Termiche | Valore | Unitá | Norma del test | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ISO Data | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Temperatura di fusione, 10°C/min | 165 | °C | ISO 11357-1/-3 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Temp.di inflessione sotto carico, 1.80 MPa | 161 | °C | ISO 75-1/-2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Coeff.di dilatazione termica lin., parallelo | 27 | E-6/K | ISO 11359-1/-2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Coeff.di dilatazione termica lin., perpend. | 125 | E-6/K | ISO 11359-1/-2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Altre Proprietà | Valore | Unitá | Norma del test |
| Assorbimento d'acqua | 0.8 | % | Sim. alla ISO 62 |
| Assorbimento d'umidità | 0.2 | % | Sim. alla ISO 62 |
| Massa volumica | 1580 | kg/m³ | ISO 1183 |
| Raccomandazione de Processabilità Stampaggio ad Iniezione | Valore | Unitá | Norma del test |
| Pre-essiccamento - Temperatura | 80 | °C | - |
| Pre-essiccamento - Tempo | 3 | h | - |
| Umidità del Processo | ≤0.35 | % | - |
| Temperatura di fusione | 182 - 199 | °C | - |
| Temperatura dello stampo | 93 - 121 | °C | - |
Caratteristiche
Processabilità e Forma di Forni
Stampaggio ad Iniezione, Estrusione Profilati, Altre Estrusioni
Forma fisica disponibile
Pellet
Caratteristiche
Copolimero
Disponibilità geografica
Nord America, South and Central America
Altre informazioni
Stampaggio ad Iniezione
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%.
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.
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 ambient temperature.
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.
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 ambient temperature.
Altre Estrusioni
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%
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.
Melt temperature 180-220 C (355-430F)
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
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.
Melt temperature 180-220 C (355-430F)
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
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