LWRT Sheets

Lightweight Reinforced Thermoplastic (LWRT) Sheets combine glass fibers and polypropylene fibers in a 50:50 mass ratio, part of the Glass-Mat Reinforced Thermoplastics (GMT) family. This combination leverages glass fiber structural reinforcement with polypropylene’s thermoplastic properties.

Manufacturing involves package opening, carding, web formation, needle punching, and hot pressing. The textile production process creates a unified, non-woven mat structure. Hot pressing at 180°C to 220°C under 1-5 MPa pressure consolidates the material into moldable sheets ranging from 1mm to 10mm thickness.

LWRT sheets deliver lightweight construction with low thermal expansion, high tensile strength, good bending strength, and excellent impact toughness. The fluffy mesh structure provides dimensional stability, noise absorption, and flame retardant performance meeting safety standards. Heat insulation and sound absorption properties complement moisture and chemical resistance. Composed entirely of glass fiber and polypropylene, the sheets contain no benzene or formaldehyde and are fully recyclable.

Primary automotive applications include underbody shielding protection devices, load-bearing plates, roof linings, door trim panels, luggage racks, roof moldings, engine covers, and trunk covers. The combination of mechanical properties, weight savings, and acoustic performance makes LWRT sheets functional for these demanding components.

Direct LWRT Sheets Manufacturer from China

RaxPanel is a direct manufacturer based in Hebei, China, specializing in providing custom composite panel solutions. With over 20 years of experience, we integrate in-house R&D, design, and production to deliver high-quality LWRT Sheets that are lighter, stronger, and more environmentally friendly.

Our factory operates an advanced production line with a daily output exceeding 1500 m², ensuring consistent quality and reliable supply for global clients. This manufacturing expertise allows us to produce LWRT Sheets with excellent mechanical properties, impact strength, and full recyclability.

We offer customized solutions developed by our engineering team to meet specific project requirements and performance standards. These lightweight reinforced thermoplastic sheets are ideal for automotive applications such as:

  • Underbody shields
  • Load-bearing components
  • Interior trim

Serving clients across more than 30 countries, we provide tailored material solutions that support innovation and sustainability. Our specialists are always available to establish contact with you.

Parameter Value / Specification
Material Composition
Glass Fiber Content 50% (mass ratio)
Polypropylene (PP) Content 50% (mass ratio)
General Properties
Density 0.9 – 1.2 g/cm³
Recyclability 100% Recyclable
Flame Retardancy (Combustion Speed) < 30 mm/min
Manufacturing Process
Hot Pressing Temperature 180 – 220 °C
Hot Pressing Pressure 1 – 5 MPa
Molding Thickness Range 1 – 10 mm
Mechanical Properties
Tensile Strength (MD) 10 – 110 N (varies by basis weight)
Tensile Strength (TD) 7 – 85 N (varies by basis weight)
Impact Strength 20 – 50 kJ/m²
Bending Strength High
Impact Toughness Excellent
Physical Properties
Dimensional Stability Excellent
Thermal Expansion Low
Heat Insulation Good
Sound Absorption Excellent
Moisture Resistance Yes
Chemical Resistance Wide Range
Typical Basis Weights & Thickness
Basis Weight (g/m²) 900 1000 1150 1250 1350 1600 1900 2200 2600
Thickness (mm) 1.8 2.0 2.3 2.7 3.0 3.5 4.0 4.5 5.2
Primary Applications Underbody shielding, Load-bearing plates, Roof linings, Door trim panels, Luggage racks, Roof moldings, Engine covers, Trunk covers





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    Frequently Asked Questions

    What is LWRT material made of?

    LWRT (Lightweight Reinforced Thermoplastic) is a GMT material made of glass fiber and polypropylene with a mass ratio of about 50:50. It is produced through a process of carding, needling, and pressing.

    What are the key advantages of LWRT sheets?

    LWRT offers excellent mechanical and physical properties like strength and stiffness, low thermal expansion, good insulation properties, resistance to moisture, and noise-absorbent qualities. It is also lightweight, recyclable, and can be faced directly with functional and decorative cover layers without adhesives.

    What applications are LWRT sheets suitable for?

    LWRT material is suitable for manufacturing underbody shielding protection devices, load-bearing plates, roof linings, door decorations, luggage racks, roof molding, engine hoods, and trunk covers, primarily in the automotive industry.

    How does LWRT compare to traditional materials like plywood?

    LWRT outperforms common substrates such as Luan/Meranti plywood. It is prized for its lightweight, low thermal expansion, insulation properties, moisture resistance, and excellent mechanical properties like strength and stiffness.

    Is LWRT an environmentally friendly material?

    Yes, LWRT is made of glass fiber and polypropylene, offering excellent environmental performance. It contains no benzene, aldehyde, phenolic, or other harmful substances, and the product can be recycled, making it a true environmental green product.

    What safety features does LWRT offer?

    LWRT has good flame retardant performance, with a combustion speed of less than 30mm/min, meeting safety standards. The glass fiber reinforcement provides impact resistance, and the material fractures with a钝角 (obtuse angle), offering protective benefits.

    Can LWRT sheets be customized for specific needs?

    Yes, LWRT can be molded into products of various thicknesses and simple shapes. After heating, the thickness can expand to more than 4 times the original, and the shaped product exhibits no rebound and good dimensional stability.

    How do you ensure long-term supply reliability for large OEM production runs?

    As a direct manufacturer with over 20 years of experience, we maintain strict control over our production processes to ensure consistent quality and availability. Our factory in Hebei, China, has a daily output capacity of 1500+ m², enabling us to meet bulk order requirements and maintain supply chain stability for clients in 30+ countries. We focus on manufacturing high-quality composite materials that are lighter, stronger, and more environmentally friendly.

    What kind of technical support and data can specifiers and engineers access for project planning?

    We provide comprehensive technical data sheets (TDS), performance test reports, and detailed information on mechanical and physical properties such as tensile strength, impact resistance, and thermal expansion. Our materials are engineered to outperform common substrates like plywood, offering excellent strength, stiffness, moisture resistance, and recyclability. We also offer material selection guidance to help meet technical and regulatory requirements.

    Can you accommodate custom sizes and specifications for specialized fabrication or construction projects?

    Yes, we specialize in customized composite panel solutions and can produce LWRT sheets in various basis weights, thicknesses, and dimensions to meet specific project needs. Our in-house R&D and production capabilities allow us to work with clients on developing products that meet unique data standards and performance requirements, particularly for applications in construction, transportation, and industrial sectors.

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