佳 盼 塑 胶
JIA PAN SU JIAO
/ Product details
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POM GB25 含25%玻璃珠,低翘曲
CELCON® GB25 CD3501 BLACK
CELCON® GB25 CF3500 NATURAL
CELCON GB25 | POM | Glass Reinforced
Description
Celcon® GB25 acetal copolymer is a 25% 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 |
1580 |
kg/m³ |
ISO 1183 |
|
Melt volume rate (MVR) |
13 |
cm³/10min |
ISO 1133 |
|
|
MVR test temperature |
190 |
℃ |
ISO 1133 |
|
|
MVR test load |
2.16 |
kg |
ISO 1133 |
|
|
Mold shrinkage - parallel |
1.5 |
% |
ISO 294-4 |
|
|
Mold shrinkage - normal |
1.3 |
% |
ISO 294-4 |
|
|
Water absorption (23℃-sat) |
0.65 |
% |
ISO 62 |
|
|
Humidity absorption (23℃/50%RH) |
0.2 |
% |
ISO 62 |
|
|
Mech |
Mechanical properties |
Value |
Unit |
Test Standard |
|
Tensile modulus (1mm/min) |
3700 |
MPa |
ISO 527-2/1A |
|
|
Tensile stress at yield (50mm/min) |
49 |
MPa |
ISO 527-2/1A |
|
|
Tensile strain at yield (50mm/min) |
4 |
% |
ISO 527-2/1A |
|
|
Flexural modulus (23℃) |
3600 |
MPa |
ISO 178 |
|
|
Charpy notched impact strength @ 23℃ |
2.4 |
kJ/m² |
ISO 179/1eA |
|
|
Charpy notched impact strength @ -30℃ |
2.2 |
kJ/m² |
ISO 179/1eA |
|
|
Notched impact strength (Izod) @ 23℃ |
2.6 |
kJ/m² |
ISO 180/1A |
|
|
Therm |
Thermal properties |
Value |
Unit |
Test Standard |
|
Melting temperature (10℃/min) |
165 |
℃ |
ISO 11357-1,-2,-3 |
|
|
DTUL @ 1.8 MPa |
105 |
℃ |
ISO 75-1/-2 |
|
|
Coeff.of linear therm. expansion (parallel) |
0.7 |
E-4/℃ |
ISO 11359-2 |
|
|
Coeff.of linear therm. expansion (normal) |
0.8 |
E-4/℃ |
ISO 11359-2 |
|
|
SpecProd |
Test specimen production |
Value |
Unit |
Test Standard |
|
Processing conditions acc. ISO |
9988-2 |
- |
Internal |
Processing
Pre Drying
Drying is not normally required. If material has come in contact with moisture through improper storage or handling or through regrind use, drying may be necessary to prevent splay and odor problems.
Drying time (h):3
Drying temperature (℃):80 - 100
