S-Plastics valox PBT plastic is a kind of plastic composed of polybutylene terephthalate. It is a semi crystalline material with very good chemical stability, mechanical strength, electrical insulation characteristics and thermal stability.
1. Mechanical properties: high strength, fatigue resistance, stable size and small creep (little change under high temperature conditions)
2. Heat aging resistance: the enhanced UL temperature index reaches 120 ~ 140 ℃ (outdoor long-term aging resistance is also very good);
3. Excellent long-term thermal deterioration.
4. Low water absorption, good mechanical properties and dimensional stability.
5. Good weather resistance.
6. Good abrasion resistance and abrasion resistance.
7. Good fluidity and crystallinity, suitable for rapid prototyping.
8. The improvement effect of glass fiber physical property is good.
9. Easy to reach V-0 level, physical properties can maintain electrical performance:
Insulation performance: excellent (wet and high temperature can also maintain stable electrical performance, and it is an ideal material for manufacturing electronic and electrical parts);
Dielectric coefficient: 3.0-3.2;
Arc resistance: 120s;
S-Plastics valox 357U is an unreinforced, UV stabilized, impact modified flame retardant Polybutylene Terephthalate/Polycarbonate (PBT) injection moldable grade. It has excellent chemical resistance and a UL94V0@0.64mm and 5VA@3.0mm flame rating. This is a good candidate for applications in the electrical industry including bobbins, switches, and enclosures.version of valox 357 is Nonblooming flame retardant.
Properties
| MECHANICAL |
Value |
Unit |
Standard |
| Tensile Stress, yld, Type I, 50 mm/min |
48 |
MPa |
ASTM D 638 |
| Tensile Stress, brk, Type I, 50 mm/min |
48 |
MPa |
ASTM D 638 |
| Tensile Strain, brk, Type I, 50 mm/min |
110 |
% |
ASTM D 638 |
| Flexural Stress, yld, 1.3 mm/min, 50 mm span |
82 |
MPa |
ASTM D 790 |
| Flexural Stress, brk, 1.3 mm/min, 50 mm span |
82 |
MPa |
ASTM D 790 |
| Flexural Modulus, 1.3 mm/min, 50 mm span |
2060 |
MPa |
ASTM D 790 |
| Hardness, Rockwell R |
117 |
- |
ASTM D 785 |
| IMPACT |
Value |
Unit |
Standard |
| Izod Impact, unnotched, 23°C |
3204 |
J/m |
ASTM D 4812 |
| Izod Impact, notched, 23°C |
534 |
J/m |
ASTM D 256 |
| Gardner, 23°C |
43 |
J |
ASTM D 3029 |
| Modified Gardner, 23°C |
43 |
J |
ASTM D 3029 |
| THERMAL |
Value |
Unit |
Standard |
| HDT, 0.45 MPa, 6.4 mm, unannealed |
137 |
°C |
ASTM D 648 |
| HDT, 1.82 MPa, 6.4 mm, unannealed |
98 |
°C |
ASTM D 648 |
| CTE, -40°C to 40°C, flow |
9.18E-05 |
1/°C |
ASTM E 831 |
| CTE, 60°C to 138°C, flow |
1.24E-04 |
1/°C |
ASTM E 831 |
| Relative Temp Index, Elec |
120 |
°C |
UL 746B |
| Relative Temp Index, Mech w/impact |
120 |
°C |
UL 746B |
| Relative Temp Index, Mech w/o impact |
140 |
°C |
UL 746B |
| PHYSICAL |
Value |
Unit |
Standard |
| Specific Gravity |
1.34 |
- |
ASTM D 792 |
| Specific Volume |
0.75 |
cm³/g |
ASTM D 792 |
| Water Absorption, 24 hours |
0.08 |
% |
ASTM D 570 |
| Mold Shrinkage, flow, 0.75-2.3 mm |
0.8 - 1.1 |
% |
S-Plastics Method |
| Mold Shrinkage, flow, 2.3-4.6 mm |
1 - 1.4 |
% |
S-Plastics Method |
| Mold Shrinkage, xflow, 0.75-2.3 mm |
0.9 - 1.3 |
% |
S-Plastics Method |
| Mold Shrinkage, xflow, 2.3-4.6 mm |
1.2 - 1.6 |
% |
S-Plastics Method |
| ELECTRICAL |
Value |
Unit |
Standard |
| Volume Resistivity |
>1.2E+16 |
Ohm-cm |
ASTM D 257 |
| Dielectric Strength, in air, 3.2 mm |
18.5 |
kV/mm |
ASTM D 149 |
| Dielectric Strength, in oil, 1.6 mm |
25.1 |
kV/mm |
ASTM D 149 |
| Dielectric Strength, in oil, 3.2 mm |
18.5 |
kV/mm |
ASTM D 149 |
| Relative Permittivity, 100 Hz |
3.2 |
- |
ASTM D 150 |
| Relative Permittivity, 1 MHz |
3.2 |
- |
ASTM D 150 |
| Dissipation Factor, 100 Hz |
0.003 |
- |
ASTM D 150 |
| Dissipation Factor, 1 MHz |
0.03 |
- |
ASTM D 150 |
| Arc Resistance, Tungsten {PLC} |
6 |
PLC Code |
ASTM D 495 |
| Hot Wire Ignition {PLC) |
2 |
PLC Code |
UL 746A |
| High Voltage Arc Track Rate {PLC} |
3 |
PLC Code |
UL 746A |
| High Ampere Arc Ign, surface {PLC} |
3 |
PLC Code |
UL 746A |
| Comparative Tracking Index (UL) {PLC} |
2 |
PLC Code |
UL 746A |
| FLAME CHARACTERISTICS |
Value |
Unit |
Standard |
| UL Recognized, 94HB Flame Class Rating (3) |
0.45 |
mm |
UL 94 |
| UL Recognized, 94V-0 Flame Class Rating (3) |
0.63 |
mm |
UL 94 |
| UL Recognized, 94-5VA Rating (3) |
2.99 |
mm |
UL 94 |
| CSA (See File for complete listing) |
LS88480 |
File No. |
CSA LISTED |
| Oxygen Index (LOI) |
30 |
% |
ASTM D 2863 |
| UV-light, water exposure/immersion |
F2 |
- |
UL 746C |
| Source GMD, last updated:01/05/2000 |
|
|
Processing
| Parameter |
|
|
| Injection Molding |
Value |
Unit |
| Drying Temperature |
120 |
°C |
| Drying Time |
3 - 4 |
hrs |
| Drying Time (Cumulative) |
12 |
hrs |
| Maximum Moisture Content |
0.02 |
% |
| Melt Temperature |
250 - 265 |
°C |
| Nozzle Temperature |
245 - 260 |
°C |
| Front - Zone 3 Temperature |
250 - 265 |
°C |
| Middle - Zone 2 Temperature |
245 - 260 |
°C |
| Rear - Zone 1 Temperature |
240 - 255 |
°C |
| Mold Temperature |
50 - 75 |
°C |
| Back Pressure |
0.3 - 0.7 |
MPa |
| Screw Speed |
50 - 100 |
rpm |
| Shot to Cylinder Size |
40 - 80 |
% |
| Vent Depth |
0.025 - 0.038 |
mm |
| Source GMD, last updated:01/05/2000 |
|
Hot-sale product(in stock)
PBT: 325,325FC,310,310SE0
PC+PBT: 357 357U,5220U,V3900WX
PBT + glass filled: DR51, DR48, 420 420se0, 553, 508, 420HP
Our warehouse
With a strong sales network and strength, we have warehousing services in Guangzhou, Dongguan, Shenzhen free trade zone, Hong Kong and other four places (conventional product inventory exceeds 1000 tons). We can provide customers with rapid response, professional service and excellent products!
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