GROMAX Plastic Materials <PBT1200-211L>

PBT Series unreinforced middle viscosity injection moulding grade.

Characteristics:
  • Excellent electrical property
  • Excellent temperature resistance, high heat distortion temperature
  • Excellent mechanic and chemical property
  • Excellent weatherability
  • Excellent wear property
  • Excellent moldability
  • High resistance to fuels, oil, fats and many solvents
Injection Moulding Condition:
Cylinder temperature 230-260°C
Nozzle temperature 245-250°C
Mould temperature 30-100°C, suitable temperature 40-60°C
Injection rate Middle
Screw speed 60-120 rpm, to be chosen in such a way that plasticizing time is just within cooling time
Injection pressure 500-1000 kg/cm²
Holding pressure 300-700 kg/cm²
Back pressure 0-3 kg/cm²
Mould shrinkage Mould shrinkage 1.6mm thickness is 1.2-1.8 % under the test method ASTM D955
 
Packaging:
25 kg/paper bag or 850 kg/super sack
 
Material Handling:
Moisture pick-up from ambient air should be avoided. Keep hopper properly closed
 

Specifications:
Property
Value
Unit
Test Method
ASTM
Intrinsic Viscosity
0.79±0.02
dl/gr
D2857
Melting Flow Index (235°C×2.16kgf)
50-78
g/10 min
D1238
Carboxyl End Groups
<50
meq/kg
 
Color L
>84
-
 
Color b
<2
-
 
Specific Gravity
1.30-1.32
-
D792
Melting Point
225±2
°C
DSC
Coef. of Linear Thermal Expansion
9
cm/cm°C
D696
Heat Deflection Temperature under Load 18.6 kg/cm²
60
°C
D648
4.6kg/cm²
155
Moisture Absorption (24h)
0.06
%
D570
Flammability acc. To UL94 (1.6 mm)
HB
-
UL94
 
 
 
 
Tensile Strength
500-600
kg/cm²
D638
Tensile Elongation
>30
%
D638
Flexural Strength
800-900
kg/cm²
D790
Flexural Modulus
23000
kg/cm²
D790
Izod Impact Strength-notched 1/4"
>4.0
kg-cm/cm
D256
Hardness-rockwell
85-90
M
D785
 
 
 
 
Dielectric Strength-2 mm thickness
>20
KV/mm
D149
Volumn Resistivity
>
Omega-cm
D257
Surface Resistivity
>
Omega
D257
Dielectric Constant
3.3
60Hz
D150
Dielectric Dissipation Factor
0.001
60Hz
D150
Arc Resistance
120
SEC
D495

• For reference only.
• All data in the table are the typical values of the material and not the minimum values of the material specifications.

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