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  • Celanese PBT 3316 Plastic Overview | Properties and Data Sheet
  • Celanese PBT 3316 Plastic Overview | Properties and Data Sheet
  • Celanese PBT 3316 Plastic Overview | Properties and Data Sheet
  • Celanese PBT 3316 Plastic Overview | Properties and Data Sheet
  • Celanese PBT 3316 Plastic Overview | Properties and Data Sheet
  • Celanese PBT 3316 Plastic Overview | Properties and Data Sheet

Celanese PBT 3316 Plastic Overview | Properties and Data Sheet

Celanese PBT 3316 is a 30% glass fiber reinforced PBT plastic with halogenated flame retardants, rated V-0 and 5VA across multiple thicknesses. It combines high mechanical strength, thermal stability (HDT 220°C), and excellent electrical insulation, making it ideal for connectors, relays, and electronic housings.

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  • Product Struction

What is PBT 3316 Plastic

 

Against the backdrop of electronic products constantly evolving towards miniaturization, high integration and high reliability, the performance requirements for structural materials are also upgrading simultaneously. Flame retardancy, safety, electrical insulation, thermal stability and processing efficiency have become the core considerations when selecting materials for structural components such as connectors, relays and power modules. The PBT 3316 launched by Celanese is precisely a material solution designed for such high-performance electronic applications. Based on the traditional glass fiber reinforced PBT, it further optimizes the flame retardant system and processing performance, achieving a comprehensive improvement in material performance and manufacturing compatibility.

PBT 3316

 

01 | Comprehensive Performance Analysis: Triple Enhancement in heat, electricity and mechanics

 

Comprehensive coverage of flame retardant safety

PBT 3316 achieves UL94 V-0 grade in all test thicknesses ranging from 0.38mm to 3.0mm, and even reaches the strict 5VA grade when ≥1.5mm, meeting the high standards of fire protection grades for electronic and electrical appliances.

Outstanding thermal stability, suitable for long-term use at high temperatures

The HDT of the material reaches 220°C at 0.45MPa, the Vicat softening point is 225°C, and the RTI (electrical) is as high as 140°C, meeting the requirements of long-term high-temperature operation environments such as new energy vehicle control modules and industrial power connectors.

High Strength + Impact Resistance for Structural Reliability

The 30% glass fibre reinforced structure delivers a tensile strength of 135 MPa, a flexural modulus of 10,300 MPa, and a notched impact strength of 8.5 kJ/m², which ensures rigidity and maintains good drop resistance.

It has both electrical insulation and dimensional stability

The volume resistance is 1E16 Ω·cm, the dielectric strength is 34 kV/mm, the water absorption rate is as low as 0.4%, the moisture absorption rate is only 0.16%, the linear expansion coefficient is low, and the electrical performance and external dimensions can remain stable in a humid environment.

 

02 | From Materials to the End: Ideal materials for electronic structural components

 

The development of PBT 3316 fully considers the multiple demands of electronic structural components for high temperature resistance, fire resistance, strength and processing and forming, and is particularly suitable for:

   ✔ High-frequency connector housing and socket

   ✔ Industrial-grade relay base and module housing

   ✔ Vehicle-mounted ECU connectors and terminal sockets

Its good fluidity (melt index 12 g/10min), low warpage rate and no precipitation performance enable it to smoothly adapt to high-speed multi-cavity mold injection molding, reduce mold contamination and improve production efficiency.

 

03 | Overview of Core Performance Data of PBT 3316

 

ULConditionStandardValueUnit
CTIIEC 601122PLC
Volume ResistivityASTM D2571E16Ω.cm
Dimensional StabilityUL7460.0%
Dielectric StrengthASTM D14923KV/mm
Arc ResistanceASTM D4956PLC
Flame RatingAll Color 0.38mmUL94V-0
Flame RatingAll Color 0.75mmUL94V-0
Flame RatingAll Color 1.5mmUL94V-0 5VA
Flame RatingAll Color 2.0mmUL94V-0 5VA
Flame RatingAll Color 3.0mmUL94V-0 5VA
Mechanical behaviorConditionStandardValueUnit
ElongationBreak 5mm/minISO 5272.5%
Flexural Strength23°CISO 178200MPa
Flexural Modulus23°CISO 17810300MPa
Izod Notch Impact23°CISO 1807.7kJ/m²
Tensile StrengthBreak 5mm/minISO 527135MPa
Tensile ModulusISO 52710700MPa
Charpy Un-notch Impact23°CISO 17959kJ/m²
Charpy Un-notch Impact-30°CISO 17942kJ/m²
Charpy Notch Impact23°CISO 1798.5kJ/m²
Charpy Notch Impact-30°CISO 1798.5kJ/m²
ThermalConditionStandardValueUnit
HDT0.45MPaISO 75220°C
HDT1.8MPaISO 75208°C
HDT8.0MPaISO 75165°C
Melting Temperature10°C/minISO 11357225°C
CLEFlowISO 113592.5E-5cm/cm/°C
CLExFlowISO 113598E-5cm/cm/°C
Vicat Softening Temperature50°C/hr 50NISO 306225°C
Physical propertyConditionStandardValueUnit
Water Absorption23°C SaturationISO 620.4%
Humidity Absorption23°C 50RHISO 620.16%
ShrinkageFlowISO 2940.3~0.5%
ShrinkagexFlowISO 2940.8~1.1%
DensityISO 11831.66g/cm³
Melt Index250°C 2.16kgISO 113312g/10min
Melt Index250°C 2.16kgISO 11337cm³/10min
Electrical propertiesConditionStandardValueUnit
CTIIEC 60112250V
Dielectric Constant1MHzIEC 602502.9
Dielectric Constant100HzIEC 602503.6
Volume ResistivityIEC 600931E+15Ω.cm
Dielectric StrengthIEC 6024334KV/mm
Dissipation Factor1MHzIEC 602500.0145
Dissipation Factor100HzIEC 602500.0033
Surface ResistivityIEC 600931E15Ω
HardnessConditionStandardValueUnit
Rockwell HardnessR(Scale)ISO 203989
Shore Hardness D15sISO 86885

 

04|Performance Comparison: PBT 3316 vs. Conventional Flame-Retardant Glass Fiber PBT

 

PropertyPBT 3316Standard 30% GF PBT
Flame RatingV-0 / 5VA (all thicknesses)V-0 (≥1.6mm)
Hot-wire Arc Tracking Index (HAI, 3.0mm)PLC = 0 (Excellent)PLC = 2–3 (Average)
Heat Deflection Temperature (0.45 MPa)220°C200–210°C
Tensile Strength135 MPa120–130 MPa
Notched Charpy Impact (23°C)8.5 kJ/m²6–7 kJ/m²
Electrical Stability (Moisture Influence)High (Water absorption: 0.4%)Moderate (0.6–0.8%)
Mold Contamination RiskVery low, no bloomingPotential for decomposition residues

 

Conclusion:PBT 3316 delivers superior flame consistency, electrical reliability, and thermal resistance compared to conventional flame-retardant 30% GF PBT. It represents a full upgrade over standard solutions in demanding electronic applications.

 

05|Manufacturing Friendly: Suitable for automated injection moulding and precision machining

 

Good flowability, easy to fill complex parts

Melt index up to 12 g/10min, suitable for micro plugs and pin structures with high flowability, shortening injection cycle time.

The size shrinkage is controllable and the surface is smooth

The shrinkage rate in the flow direction is as low as 0.3%, and the precision of the finished product is high. The glass fibers are evenly distributed, reducing the problems of glass fiber protrusion or silver streaks on the surface.

No seepage or minimal precipitation leads to a longer service life of the mold

The lubrication system in the material formula is optimized, remaining stable at high temperatures, less prone to cavity precipitation, and extending the maintenance cycle.

 

06 | Ductility and Sustainability: Reference Samples for Future Electronic Materials

 

PBT 3316 not only focuses on current demands, but also has the potential to extend in a sustainable direction:

The formula can be extended to halogen-free flame retardant systems, meeting stricter regulations such as RoHS and REACH

It can be mixed with other modified components (such as UV resistance and chemical resistance), and extended to scenarios such as outdoor electronic and electric vehicle interfaces

It has a high recycling rate and can be reused in some low-end applications, supporting the concept of green manufacturing

 

07 | Summary | Celanese PBT 3316: A PBT Plastic that Defines "Comprehensive reliability"

 

From thermal performance to electrical insulation, from processing performance to environmental protection trends, PBT 3316 demonstrates all-round competitiveness beyond the conventional. For electronic manufacturing enterprises that pursue "performance balance + production efficiency", it is not merely a material, but also a solution for the next generation of precision electronic structural components.

 

 

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