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Last Updated: 9/22/2005
© 1996~2005
Gromax Enterprises Corp.
All Right Reserved.

• PRICES, SPECIFICATIONS, AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE.

 

GROMAX>Plastic Materials
 

GROMAX Engineering Plastic Materials
(Polybutylene Terephthalate)

PBT Series Engineering Plastic Materials (Polybutylene Terephthalate)

For individual data sheet, please click on the model below:
PBT1200-211D PBT1100-211L PBT1100-211H
PBT1200-211L PBT1100-211M PBT1100-211S
PBT1200-211M PBT1100-211D PBT1100-211XT

TOP Engineering Plastic Materials (Polybutylene Terephthalate)

PBT Series unreinforced middle viscosity injection moulding grade.

Characteristics:

(For All Models except PBT1100-211XT)

  • 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

   (For Model PBT1100-211XT only)
  • Excellent electrical property
  • Excellent temperature resistance, high heat distortion temperature
  • Excellent mechanic and chemical property
  • Excellent weatherability
  • Excellent wear property
  • Excellent moldability
  • Good chemical resistance against fuels, oil, fats and many solvents
  • Good creep behavior
  • No tendency to stress crack
  • Very low water absorption
Injection Moulding Condition:    
(For All Models except PBT1100-211XT)
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
  (For Model PBT1100-211XT only)
Cylinder temperature 240-265°C
Nozzle temperature 250-265°C
Cooling temperature 20-60°C, water bath
L/D 24~28
Compression ratio 2.5~3.5
Drawing speed 30~250 m/min
Mould shrinkage Mould shrinkage 1.6mm thickness is 1.2-1.8 % under the test method ASTM D955
     
Packaging:    
(For All Models except PBT1100-211XT)
25 kg/paper bag or 850 kg/super sack
   (For Model PBT1100-211XT only)
25 kg/aluminum foil laminate paper bag or
850 kg/aluminum foil laminate super sack
     
Material Handling:   Application:
(For All Models except PBT1100-211XT)
Moisture pick-up from ambient air should be avoided. Keep hopper properly closed
   (For Model PBT1100-211XT only)
Loose tube as optical waveguide sheathing
 

Specifications:
<PBT1200 SERIES> Click for <PBT1100 SERIES>
Property
PBT1200-211D
PBT1200-211L
PBT1200-211M
Unit
Test Method
ASTM
Intrinsic Viscosity
0.75±0.02
0.79±0.02
0.83±0.02
dl/gr
D2857
Melting Flow Index (235°C×2.16kgf)
64-78
50-78
41-50
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
Property
PBT1200-211D
PBT1200-211L
PBT1200-211M
Unit
Test Method
ASTM
Tensile Strength
500-600
kg/cm²
D638
Tensile Elongation
>30
>30
>50
%
D638
Flexural Strength
800-900
kg/cm²
D790
Flexural Modulus
23000
kg/cm²
D790
Izod Impact Strength-notched 1/4"
>4.0
>4.0
>4.5
kg-cm/cm
D256
Hardness-rockwell
85-90
M
D785
Property
PBT1200-211D
PBT1200-211L
PBT1200-211M
Unit
Test Method
ASTM
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.
 
 
<PBT1100 SERIES> Click for <PBT1200 SERIES>
Property
PBT1100-211L
PBT1100-211M
PBT1100-211D
PBT1100-211H
PBT1100-211S
PBT1100-211XT
Unit
Test Method
ASTM
Intrinsic Viscosity
0.97±0.02
1.00±0.02
0.88±0.02
1.10±0.02
1.20±0.02
-
dl/gr
D2857
Melting Flow Index (235°C×2.16kgf)
23-29
18-22
32-40
11-14
8-10
-
g/10 min
D1238
Carboxyl End Groups
<50
<50
<40
<45
<45
-
meq/kg
 
Color L
>84
>84
>84
>87
>87
-
-
 
Color b
<3.0
<3.0
<2.8
<4.0
<4.0
-
-
 
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
Property
PBT1100-211L
PBT1100-211M
PBT1100-211D
PBT1100-211H
PBT1100-211S
PBT1100-211XT
Unit
Test Method
ASTM
Tensile Strength
500-600
>500
kg/cm²
D638
Tensile Elongation
>90
>120
>50
>150
>180
>150
%
D638
Flexural Strength
800-900
>800
kg/cm²
D790
Flexural Modulus
23000
24000
kg/cm²
D790
Izod Impact Strength-notched 1/4"
>4.0
>4.5
>4.5
>5.5
>6.0
>5.0
kg-cm/cm
D256
Hardness-rockwell
85-90 M
118 R
M/R
D785
Property
PBT1100-211L
PBT1100-211M
PBT1100-211D
PBT1100-211H
PBT1100-211S
PBT1100-211XT
Unit
Test Method
ASTM
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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