Low Density Polypropylene (LDPP)

Properties of Low Density Polypropylene (LDPP)

LDPP 16MA400 offers high melt flow and excellent thermal stability, making it ideal for fast-cycle injection moulding.

• Melt Flow Index (230°C / 2.16 kg): ~16 g/10 min
  
  
• Tensile Strength: ~25–30 MPa
  
  
• Flexural Modulus: ~1200 MPa
  
  
• Elongation at Break: ~300 %
  
  
• Density: 0.90 g/cm³
  
  
• Heat Deflection Temperature (0.45 MPa): ~90 °C
  
  
• Vicat Softening Point: ~150 °C
  
  
• Impact Strength (notched, 23 °C): 3–5 kJ/m²
  
  
• Water Absorption: <0.01 %
  
  
• Excellent processability and dimensional stability
  
  

These characteristics make LDPP 16MA400 an excellent choice for parts requiring lightness, flexibility, and consistent moulding quality.

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Pros of Low Density Polypropylene

• High impact resistance with good flexibility
  
  
• Excellent chemical and corrosion resistance
  
  
• Lightweight with low density
  
  
• High melt flow for easy mould filling
  
  
• Good fatigue and stress-crack resistance
  
  
• Low moisture absorption for stable performance
  
  
• Electrical insulation and dielectric strength
  
  
• Fully recyclable and cost-efficient for large runs

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Cons of Low Density Polypropylene

• Lower stiffness compared to high-density grades
  
  
• Moderate heat resistance (softens above 100 °C)
  
  
• Susceptible to UV degradation without stabilizers
  
  
• Limited bonding with adhesives due to non-polar surface

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Applications of Low Density Polypropylene

LDPP’s flexibility and mouldability make it suitable for a diverse range of end-use applications across industries.

• Automotive: Interior trims, air ducts, clips, and lightweight covers
  
  
• Consumer Goods: Caps, closures, packaging, containers, and toys
  
  
• Industrial: Chemical-resistant housings, buckets, and protective casings
  
  
• Electrical & Electronics: Insulated connectors, appliance covers, and cable accessories
  
  
• Medical & Healthcare: Non-reactive labware, syringes, and disposable components
  
  
• Agriculture: Flexible fittings, irrigation parts, and protective covers
  
  

At Amuse3D, we process LDPP grade 16MA400, a high-flow injection moulding grade optimized for thin-walled, high-precision components. With deep process expertise and state-of-the-art moulding technology, we help manufacturers achieve consistent quality, reduced cycle times, and superior mechanical performance.

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Machining & Finishing Options

Amuse3D’s injection moulding setup for LDPP 16MA400 maximizes material performance and surface finish.

• Melt temperature: 200–230 °C
  
  
• Mould temperature: 30–50 °C for optimal crystallization
  
  
• Excellent high-flow behaviour for thin-walled parts
  
  
• Smooth or matte surface finish achievable
  
  
• UV stabilizers, antistatic agents, and colour masterbatches supported
  
  
• Tight process control to prevent warpage or flow marks
  
  

By combining the right processing conditions with expert mould design, Amuse3D delivers LDPP parts with superior consistency and efficiency.

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Comparison to Alternatives

• Versus High Density Polypropylene (HDPP): LDPP provides better flexibility and impact strength, while HDPP offers higher rigidity and temperature resistance.
  
  
• Versus ABS: LDPP is lighter, more chemically resistant, and cost-effective, though ABS offers superior stiffness and surface finish.
  
  

LDPP remains a preferred material where light weight, flexibility, and chemical resilience are priorities.

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Conclusion

Low Density Polypropylene (LDPP 16MA400) combines excellent impact resistance, flexibility, and processability, making it ideal for injection-moulded components across automotive, industrial, and consumer sectors.

At Amuse3D, we transform LDPP into high-quality parts that meet exacting standards for performance, appearance, and durability. Learn more about our Injection Moulding Services or Get an Instant Quote to start your next LDPP project today.