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PBT 2500 未填充的聚酯合金

添加时间:2013-05-29  信息来源:http://www.simibc.com/  作者:苏州希普能塑料
泰科纳PBT 2500
 
VANDAR® 2500 MD3059 BLACK
VANDAR® 4361 MD3094 BLACK
VANDAR® 4602Z MD-BK304 BLACK
 
VANDAR 2500 | PBT | Unfilled
 
Description
Vandar 2500 is an unfilled polyester alloy which exhibits excellent toughness and impact strength. It is specially designed to offer excellent chemical resistance, good colorability and dimensional stability.
 
Other Processing
Injection Molding
Rear Temperature    450-480(230-250) deg F (deg C)
Center Temperature  460-490(235-255) deg F (deg C)
Front Temperature   470-500(240-260) deg F (deg C)
Nozzle Temperature  470-510(240-265) deg F (deg C)
Melt Temperature    470-510(240-265) deg F (deg C)
Mold Temperature    100-200(40-95    deg F (deg C)
Back Pressure       0-50             psi
Screw Speed         Moderate
Injection Speed     Fast
 
Injection speed, injection pressure and holding pressure have to be optimized to the individual article geometry. To avoid material degradation during processing low back pressure and minimum screw speed have to be used. Overheating of the material has to be avoided, in particular for flame retardant grades. Up to 25% clean and dry regrind may be used.
 
ISO Data Mechanical properties Value Unit Test Standard
Phys Density 1250 kg/m³ ISO 1183
Mold shrinkage - parallel 1.7-2.2 % ISO 294-4
Mold shrinkage - normal 1.7-2.2 % ISO 294-4
Mech Mechanical properties Value Unit Test Standard
Tensile modulus (1mm/min) 1450 MPa ISO 527-2/1A
Tensile stress at yield (50mm/min) 35 MPa ISO 527-2/1A
Tensile strain at yield (50mm/min) 5 % ISO 527-2/1A
Nominal strain at break (50mm/min) >50 % ISO 527-2/1A
Flexural modulus (23℃) 1500 MPa ISO 178
Flexural strength (23℃) 50 MPa ISO 178
Charpy impact strength @ 23℃ 203 kJ/m² ISO 179/1eU
Charpy impact strength @ -30℃ 168 kJ/m² ISO 179/1eU
Charpy notched impact strength @ 23℃ 88 kJ/m² ISO 179/1eA
Charpy notched impact strength @ -30℃ 9 kJ/m² ISO 179/1eA
Notched impact strength (Izod) @ 23℃ NB kJ/m² ISO 180/1A
Rockwell hardness 104 M-Scale ISO 2039-2
Therm Thermal properties Value Unit Test Standard
Melting temperature (10℃/min) 225 ISO 11357-1,-2,-3
Glass transition temperature (10℃/min) 70 ISO 11357-1,-2,-3
DTUL @ 1.8 MPa 50 ISO 75-1/-2
DTUL @ 0.45 MPa 125 ISO 75-1/-2
Coeff.of linear therm. expansion (parallel) 1.3 E-4/℃ ISO 11359-2
Coeff.of linear therm. expansion (normal) 1.34 E-4/℃ ISO 11359-2
SpecProd Test specimen production Value Unit Test Standard
Processing conditions acc. ISO 7792-2 - Internal
Injection molding melt temperature 260 ISO 294
Injection molding mold temperature 82 ISO 294
Injection molding flow front velocity 300 mm/s ISO 294
Injection molding hold pressure 86 MPa ISO 294
 
Processing
Pre Drying
Necessary low maximum residual moisture content: 0.02%
 
To avoid hydrolytic degradation during processing, Vandar resins have to be dried to a moisture level equal to or less than 0.02%. Drying should be done in a dehumidifying hopper dryer capable of dewpoints <-40℉ (-40℃) at 250℉ (121℃) for 4 hours.
 
For subsequent storage of the material in the dryer until processed (<= 60 h) it is necessary to lower the temperature to 100℃.
 
Drying time (h):4
Drying temperature (℃):120 - 130
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