PP HP550J is a high-quality polypropylene homopolymer produced using advanced process technology. It is designed for sheet extrusion, thermoforming, film production, raffia, and monofilament applications.
This grade features a medium melt flow rate, excellent stiffness, and balanced mechanical performance, offering superior processability and consistent product quality.

Property

Typical Value

Unit

Test Method

Melt Flow Rate (230 °C / 2.16 kg)

3.0

g/10 min

ISO 1133

Density

0.900

g/cm³

ISO 1183

Tensile Strength at Yield

33

MPa

ISO 527

Flexural Modulus

1500

MPa

ISO 178

Elongation at Break

≥ 50

%

ISO 527

Izod Impact Strength (23 °C, notched)

3.0

kJ/m²

ISO 180

Vicat Softening Point

155

°C

ISO 306

Heat Deflection Temperature (0.45 MPa)

90

°C

ISO 75

Main Characteristics of PP HP550J

  • Homopolymer structure. As a polypropylene homopolymer, PP HP550J offers excellent stiffness and dimensional stability compared with random or block copolymers.
  • Good processability. Suitable for sheet extrusion, film stretching, monofilament spinning, raffia, and thermoforming.
  • High stiffness and good mechanical strength. This resin provides superior rigidity and surface hardness, making it ideal for thin-wall and load-bearing applications.
  • Excellent balance between stiffness and clarity. Delivers good optical properties for certain film and sheet grades.
  • Food contact suitability. Certain versions of HP550J comply with food contact regulations, suitable for packaging and disposable food containers.

Typical Applications

  • Sheet and thermoforming:For production of high-quality thermoformed sheets such as cups, trays, food containers, and packaging boxes (e.g., yogurt cups, fruit trays, biscuit boxes).
  • Film and fiber (raffia): Ideal for woven bags, packaging straps, artificial turf backing, rope, twine, and other fiber extrusion applications.
  • Monofilament production:Used in industrial ropes, fishing lines, and filter fabrics.
  • Injection molding (certain variants):Applied to thin-wall household items and general injection-molded products requiring stiffness and gloss.

Processing Guidelines

  1. Recommended melt temperature: 200–250 °C.
  2. Mold temperature: 30–50 °C.
  3. Drying: Not normally required, but material should be kept dry for high-quality applications.
  4. Extrusion: Ensure uniform die temperature and proper cooling to achieve consistent film or fiber orientation.
  5. Thermoforming: Maintain forming temperature above the Vicat softening point for optimal sheet forming performance.
  6. Injection molding: Use proper gate and cooling system design to reduce warpage and shrinkage.

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