Modified PP for Large and Complex Injection-Molded Parts
Polyolefin compound in this product refers to a filled polypropylene material designed for applications requiring impact resistance, good low-temperature performance, and useful melt flow.
The typical grade is PP 401R.
The material can be used for automotive bumpers, fenders, wire clips, electrical housings, and other automotive components. It is particularly suitable for relatively large, complex, or toughness-oriented molded products.
The processing characteristics of PP can support the filling of ribs, snap-fit structures, curved surfaces, and thin-wall areas. For large automotive parts, this combination of toughness and molding adaptability can be an important purchasing consideration.
PP 401R Performance Data
PP 401R has a typical density of 0.95 g/cm³ and a molding shrinkage range of 1.10%–1.40%.
Tensile strength at break is 27 MPa, while elongation at break reaches 200%. The high elongation reflects the material's ability to undergo substantial deformation before fracture.
Flexural strength is 35 MPa, with a flexural modulus of 1250 MPa. Notched Izod impact strength is 26 kJ/m².
Under a load of 0.45 MPa, the heat deflection temperature is 85°C.
This property combination gives polyolefin compound useful deformation capability and impact performance for parts where toughness and low-temperature behavior are important. At the same time, the relatively higher molding shrinkage should be considered carefully when controlling large-part dimensions.
Match the Material to Part Size and Geometry
Automotive bumpers and fenders normally have large surface areas, curved geometry, and a risk of external impact. Material selection should therefore consider impact performance, low-temperature conditions, melt flow, and dimensional control together.
Wire clips are much smaller but place different demands on the material. Their snap-fit structures need sufficient toughness and bending capability while remaining suitable for efficient batch molding.
For electrical housings, buyers should evaluate actual working temperatures and electrical requirements before confirming material suitability.
During inquiry, customers can provide part weight, wall thickness, gate structure, minimum operating temperature, and assembly method. These details help determine whether the material matches the existing mold and finished-part requirements.
Processing Support for Modified PP
Diyou New Material has research, extrusion modification, and injection molding verification capabilities for modified PP pellets.
Material and process recommendations can be made according to required flow behavior, impact performance, and molding shrinkage.
The production base includes twin-screw extrusion and injection molding processes, allowing materials to be evaluated through actual molded parts or test specimens.
For large automotive components and continuous production projects, raw materials, processing parameters, and finished products can be managed through defined quality procedures.
Technical support for polyolefin compound can also include analysis of shrinkage, incomplete filling, warpage, and demolding problems found during injection production.
Product Specifications
|
Parameter |
Specification |
|
Material / Typical Grade |
Filled PP, PP 401R |
|
Density |
0.95 g/cm³ |
|
Molding Shrinkage |
1.10%–1.40% |
|
Elongation at Break |
200% |
|
Heat Deflection Temperature at 0.45 MPa |
85°C |
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