Introduction to Saudi Basic PBT 420

In the field of electrical and precision engineering, the selection of materials is not only related to performance, but also to the success or failure of the product. Saudi Basic PBT 420, as a 30% glass fiber reinforced high heat-resistant grade PBT material, has been verified and applied by many global manufacturers, especially suitable for product development scenarios with high requirements for thermal stability, electrical safety and structural strength.

PBT 420

01 | Why choose PBT 420?

Structural stability and rigidity

PBT 420 is glass fibre reinforced to provide excellent flexural and tensile properties and is resistant to complex geometries and structural loads. Whether it's a small connector housing or a large electrical bracket, deformation is kept to a very low level.

Reliable partner in thermal environments

In the face of thermal stress environments such as high motor speed heat generation or light fixture heat dissipation aggregation, PBT 420 is able to operate stably at high temperatures with no change in dimensions and the same performance. Its thermal stability makes long-term use no longer a challenge.

Outstanding electrical insulation performance

For electronic components, insulation performance is critical. PBT 420 has extremely low dielectric loss and high dielectric strength, maintaining electrical reliability in a wide range of thicknesses and meeting many international insulation standards.

UL certification, confidence guarantee

PBT 420 has passed the strict UL safety certification, from the burning wire test to the long-term thermal aging performance. This not only enhances the market competitiveness of end products, but also provides strong support for global exports.

02 | Saudi Basic PBT 420 Application Case

Electric motor end cap (famous home appliance brand)

・Problem: Long-term high-speed operation leads to high-temperature deformation of the end cap part, and traditional PBT is too large due to thermal deformation, which leads to jamming and abrasion problems.
・Solution: PBT 420 maintains excellent dimensional stability and strength at high temperatures, ensuring that the end caps are tightly fitted and impact-resistant over the long term.

LED Spotlight Bracket (Lighting Manufacturer)

・Problem: LED heat source is concentrated, ordinary material bracket is easy to crack due to thermal stress, which affects the life of the whole lamp.
・Solution: After adopting PBT 420, the heat-resistant aging time was significantly improved without sacrificing structural strength, and the failure rate of the whole lamp dropped by more than 60%.

Small electrical connectors (automotive parts supplier)

・Problem: Insulation degradation at the connector due to long-term current-carrying heat, which in turn triggers the risk of electrical short-circuit.
・Solution: PBT 420's excellent electrical insulation and burning wire passability allows the connector to pass a number of IEC and UL certification tests at a thickness of 0.84mm.

03 | Saudi Basic PBT 420 Datasheet

Mechanical behavior	Condition	Standard	Value	Unit
Elongation	Break 5mm/min	ASTM D638	3	%
Flexural Strength	Break 1.3mm/min	ASTM D790	190	MPa
Flexural Modulus	1.3mm/min	ASTM D790	7580	MPa
Izod Un-notch Impact	23°C	ASTM D4812	81.73	kJ/m²
Izod Notch Impact	23°C	ASTM D256	8.67	kJ/m²
Tensile Strength	Break 5mm/min	ASTM D638	119	MPa
Thermal	Condition	Standard	Value	Unit
HDT	Unanealed 0.45MPa 6.4mm	ASTM D648	215	°C
HDT	Unanealed 1.8MPa 6.4mm	ASTM D648	207	°C
CLE	Flow -40.0~40°C	ASTM E831	2.52E-5	cm/cm/°C
CLE	Flow 60~138°C	ASTM E831	2.52E-5	cm/cm/°C
Physical property	Condition	Standard	Value	Unit
Water Absorption	24hr	ASTM D570	0.06	%
Shrinkage	Flow 1.50-3.20mm	INTERNAL METHOD	0.3~0.5	%
Shrinkage	Flow 3.20-4.60mm	INTERNAL METHOD	0.5~0.8	%
Shrinkage	xFlow 1.50-3.20mm	INTERNAL METHOD	0.4~0.6	%
Shrinkage	xFlow 3.20-4.60mm	INTERNAL METHOD	0.6~0.9	%
Specific Volume		ASTM D792	0.66	cm³/g
Density		ASTM D792	1.53	g/cm³
Electrical properties	Condition	Standard	Value	Unit
Dielectric Constant	1MHz	ASTM D150	3.7
Dielectric Constant	100Hz	ASTM D150	3.8
Volume Resistivity		ASTM D257	3.2E+16	Ω.cm
Dielectric Strength	1.6mm In Oil	ASTM D149	24	KV/mm
Dielectric Strength	3.2mm In Air	ASTM D149	18.7	KV/mm
Dissipation Factor	1MHz	ASTM D150	0.02
Dissipation Factor	100Hz	ASTM D150	0.002
Hardness	Condition	Standard	Value	Unit
Rockwell Hardness	R(Scale)	ASTM D785	118
Flammability	Condition	Standard	Value	Unit
Limiting Oxygen Index		ASTM D2863	19	%
Flame Rating	0.84mm	UL94	HB
Flame Rating	All Color 1.0mm	UL94	HB
Flame Rating	All Color 1.5mm	UL94	HB
Flame Rating	All Color 3.0mm	UL94	HB
Flame Rating	All Color 6.0mm	UL94	HB

04 | How does PBT 420 address common customer pain points?

Customer Challenges	How PBT 420 Addresses Them
Significant warping or dimensional drift at high temperatures	High heat deflection temperature and low shrinkage ensure excellent dimensional stability and structural integrity.
Insufficient strength, prone to cracking during assembly	Reinforced with 30% glass fiber, offering high rigidity and enhanced impact and flexural strength.
Electrical performance not meeting safety standards	Combines high dielectric strength, low dissipation factor, and UL certifications to meet stringent electrical insulation and safety requirements.
Cost pressure in production	Compared to PA66, PBT offers shorter molding cycles, lower moisture absorption, and more stable processing, reducing total manufacturing costs.
Stringent export compliance requirements	Fully UL-certified and compliant with North American and EU regulatory standards, ensuring smoother market access.

05 | Performance Upgrade: Compared to Conventional PBT Grades

Performance Category	Conventional PBT	SABIC PBT 420
Heat Deflection Temperature (HDT)	160–180°C	Up to 207–215°C
Stiffness & Strength	Moderate	High rigidity, flexural modulus >7500 MPa
Dimensional Stability	Prone to shrinkage and warping	Low shrinkage rate, precise dimensions
Flame Retardancy	Typically HB or V2	Certified HB, GWIT 750–825°C
Molding Efficiency	Standard	Excellent flowability, ideal for high-volume injection molding

06 | Who needs PBT 420 the most?

Electrical connector manufacturers: long-term heat resistance, electrical stability, high assembly accuracy

Small motor and transmission companies: high temperature and high load environment, the material must be ‘resistant’ to long time operation

Home appliance shells and structural components companies: valued resistance to deformation, strength and surface quality of both

LED lighting industry designers: Materials should not only support the structure, but also not due to heat and aging cracks

07 | Conclusion: Choosing the right material is the starting point for manufacturing competitiveness

Saudi Basic PBT 420 is more than just a plastic, it is a highly stable and predictable engineering solution. It helps manufacturers strike the ideal balance between structural design, electrical safety, productivity and global compliance.

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