PP HP550J | PP Raffia Grade | Polypropylene Homopolymer

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.

In the Chinese market, commonly comparable or alternative grades include T30S and S1003, which are also widely used raffia-grade polypropylene (PP) resins. These grades exhibit performance characteristics very similar to PP HP550J, particularly in terms of melt flow rate, crystallization behavior, and drawing stability.

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.

What are the main manufacturers of HP550J?

HP550J is not a proprietary grade belonging to a single manufacturer; rather, it is widely recognized in the global market as a standard grade of polypropylene (PP) homopolymer raffia resin. In the international polypropylene industry, many petrochemical producers manufacture HP550J or equivalent grades with very similar specifications. Although the brand names and production processes may vary among manufacturers, these materials typically share comparable melt flow rate, mechanical properties, and processing characteristics, allowing them to be used interchangeably in many applications.

Several major producers supply PP HP550J or equivalent products in the global market. These include well-known petrochemical companies such as LyondellBasell, which markets the grade under the Moplen HP550J brand, as well as Middle Eastern producers like Jam Petrochemical Company, Shazand Petrochemical Company, and Marun Petrochemical Company. In addition, Chinese manufacturers such as Jinneng Science & Technology also produce HP550J or comparable raffia-grade polypropylene resins.