點擊圖片查看大圖CELCON GB10 | POM | Glass Reinforced
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Celcon® GB10 is a 10% glass bead filled grade for low shrinkage and warp resistance in large, flat, and thin walled parts.
Chemical abbreviation according to ISO 1043-1: POM
Other Processing
Injection Molding
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 material.
Melt Temperature: Preferred range 182-199℃ (360-390℉). Melt temperature should never exceed 230℃ (450℉).
Mold Surface Temperature: Preferred range 82-93℃ (180-200℉) especially with wall thickness less than 1.5 mm (0.060 in.). May require mold temperature as high as 120℃ (250℉) to reproduce mold surface or to assure minimal molded in stress. Wall thickness greater than 3mm (1/8 in.) may use a cooler (65℃/150℉) mold surface temperature and wall thickness over 6mm (1/4 in.) may use a cold mold surface down to 25℃ (80℉). In general, mold surface temperatures lower than 82℃ (180℉) may hinder weld line formation and produce a hazy surface or a surface with flow lines, pits and other included defects that can hinder part performance.
| ISO Data | Mechanical properties | Value | Unit | Test Standard |
| Phys | Density | 1470 | kg/m³ | ISO 1183 |
| Melt volume rate (MVR) | 17 | cm³/10min | ISO 1133 | |
| MVR test temperature | 190 | ℃ | ISO 1133 | |
| MVR test load | 2.16 | kg | ISO 1133 | |
| Mold shrinkage - parallel | 1.9 | % | ISO 294-4 | |
| Mold shrinkage - normal | 1.6 | % | ISO 294-4 | |
| Mech | Mechanical properties | Value | Unit | Test Standard |
| Tensile modulus (1mm/min) | 3100 | MPa | ISO 527-2/1A | |
| Tensile stress at yield (50mm/min) | 55 | MPa | ISO 527-2/1A | |
| Tensile strain at yield (50mm/min) | 7 | % | ISO 527-2/1A | |
| Tensile strain at break (50mm/min) | 10 | % | ISO 527-2/1A | |
| Charpy notched impact strength @ 23℃ | 3.5 | kJ/m² | ISO 179/1eA | |
| Therm | Thermal properties | Value | Unit | Test Standard |
| Melting temperature (10℃/min) | 166 | ℃ | ISO 11357-1,-2,-3 | |
| DTUL @ 1.8 MPa | 94 | ℃ | ISO 75-1/-2 | |
| SpecProd | Test specimen production | Value | Unit | Test Standard |
| Processing conditions acc. ISO | 9988-2 | - | Internal |
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