LWRT (Lightweight Reinforced Thermoplastic) material, also known as PPGF (Polypropylene Glass Fiber), is a type of GMT (Glass Mat Reinforced Thermoplastic) material. As an extremely lightweight composite material, it is widely used in automotive body structures.
Specifications
- Thickness: 5.0mm.
- Fiberglass content: 30–40%。
- Area weight: 1900g/㎡.
Description
The main reason for using LWRT (Lightweight Reinforced Thermoplastic) sheets for car parcel trays is that they achieve a good balance between weight, strength, cost, and processing efficiency.
Product Advantages
- Lightweight Advantages
LWRT typically has a density of 0.8–1.2 g/cm³, significantly lower than steel plates and solid plastics, resulting in weight reductions of 20%–50%.
- High Strength & High Rigidity
LWRT possesses excellent bending resistance, superior impact resistance, and is less prone to breakage (more reliable than pure plastics).
- Reliable structural stability
Low coefficient of thermal expansion, no springback after molding. Not prone to warping, deformation, shrinkage, or springback due to temperature changes or long-term stress; maintains its original structural shape even under high and low temperature cycling conditions.
- Excellent Sound Insulation and Absorption Properties
The internal fiber structure has natural sound-absorbing capabilities, helping to reduce road noise, tire noise, and rear axle vibration transmission.
- Environmentally Friendly & Recyclable
The main component is thermoplastic polypropylene (PP), which is recyclable.
- Cost and Process Advantages
Thermoforming LWRT materials are rapidly produced into final products, suitable for mass production and reducing manufacturing costs.
Performance parameters
| Area weight (g/m²) |
thickness | Heating expansion thickness | Formable thickness (excluding overlay) |
Bending Strength (50mm wide*4.5mm thick) |
|
| MD | TD | ||||
| 850 | 2mm | 6mm | 2~5mm | 10N | 8N |
| 950 | 2mm | 8mm | 2~5mm | 12N | 10N |
| 1050 | 2.2mm | 10mm | 2.5~6mm | 15N | 12N |
| 1100 | 2.6mm | 10mm | 2.5~6mm | 20N | 15N |
| 1200 | 2.8mm | 10mm | 2.5~6mm | 25N | 16N |
| 1500 | 3mm | 12mm | 2.5~7mm | 40N | 25N |
| 1800 | 3.5mm | 12mm | 2.5~8mm | 55N | 30N |
| 2100 | 4mm | 15mm | 3~8mm | 75N | 50N |
| 2500 | 5mm | 15mm | 4-8mm | 100N | 65N |
LWRT in Automotive Applications
- Trunk system.
- Door interior trim.
- Headliner system.
- Floor system.
- Acoustic and thermal insulation components.
