PLA/PBST Modified Compound – Toughened Biodegradable Plastic Pellets

Classification:

Toughened PLA/PBST biodegradable polymer compound developed for injection molding. Featuring 213% elongation at break, 5 kJ/m² notched Izod impact strength and an HDT of 80°C (1.8 MPa), with customized compounding available for specific applications.

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Product Description

Yujie's PLA/PBST modified compound is a biodegradable polymer blend developed to improve the brittleness and limited flexibility of conventional PLA. By combining PLA with PBST and optimizing the formulation, the material offers improved toughness, flexibility and processing performance for injection-molded products.

With an elongation at break of 213%, notched Izod impact strength of 5 kJ/m², and heat deflection temperature (HDT) of 80°C at 1.8 MPa, this compound provides a practical material option for applications requiring both flexibility and structural rigidity.

Key Material Properties

Improved Toughness and Flexibility

Conventional PLA can be brittle under impact or deformation. Yujie's PLA/PBST compound achieves 213% elongation at break, allowing greater deformation before fracture. Its notched Izod impact strength of 5 kJ/m² provides additional resistance to impact loading.

Balanced Rigidity and Heat Resistance

With a flexural modulus of 1,190 MPa and an HDT of 80°C under a load of 1.8 MPa, the material combines flexibility with useful structural stiffness. Actual performance depends on part geometry, processing conditions and operating temperature.

Injection Molding Processability

The compound has a melt flow index of 8 g/10 min (190°C/2.16 kg), making it a candidate for injection-molded applications. Processing conditions should be adjusted according to product design, mold configuration and equipment.

Technical Properties

Property	Test Condition	Typical Value
Melt Flow Index (MFI)	190°C / 2.16 kg	8 g/10 min
Tensile Strength	5 mm/min	26 MPa
Elongation at Break	—	213%
Flexural Strength	5 mm/min	27 MPa
Flexural Modulus	—	1,190 MPa
Notched Izod Impact Strength	1/8"	5 kJ/m²
Heat Deflection Temperature	1.8 MPa	80°C
Vicat Softening Temperature	—	70°C
Flammability	UL 94, 2.0 mm	HB

Values are based on the supplied material data and are for reference. Final material selection should be verified through application-specific testing.

Potential Applications

This PLA/PBST modified compound can be evaluated for injection-molded products requiring improved toughness compared with conventional PLA.

Potential applications include consumer goods, stationery components, household products and selected packaging accessories. Suitability depends on mechanical requirements, product design, processing conditions and applicable regulatory requirements.

Processing Recommendations

As PLA/PBST compounds are sensitive to moisture during melt processing, proper drying is important to reduce the risk of hydrolytic degradation and maintain consistent performance.

Drying: 70–80°C for approximately 4 hours

Mold temperature: 40–50°C

Moisture control: Keep material dry before processing

Processing parameters should be optimized through production trials. Material shrinkage and dimensional stability should also be evaluated during mold design.

Customized PLA/PBST Compounding

Dongguan Yujie Industrial provides polymer modification and compounding solutions based on specific manufacturing requirements.

Our technical team can support formulation adjustments for toughness, flexibility, melt flow, color and processing behavior, helping customers select suitable materials for their applications.

For technical data sheets, samples or formulation discussions, please contact Yujie Industrial.

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