PP‑LGF40 – Weather‑Resistant Long Glass Fiber Polypropylene

Wear Resistance LGF50 TPU Composite

LFT‑G^® CPP‑LGF40AR is a premium 40% long‑glass‑fiber‑reinforced polypropylene compound engineered with our proprietary continuous‑fiber impregnation technology and a specialized weathering stabilization package. Designed for long‑term outdoor and high‑humidity exposure, this grade delivers an outstanding combination of high stiffness, excellent impact toughness, and superior UV/thermal aging resistance – significantly outperforming standard short‑glass PP and even many competitive long‑fiber PP grades in demanding environmental conditions. The continuous glass fiber network forms a robust three‑dimensional skeleton within the PP matrix, ensuring exceptional creep resistance, dimensional stability, and fatigue endurance over years of service.

Performance Comparison

LFT‑G^® CPP‑LGF40AR: The Long‑Fiber Advantage for Outdoor Durability

Superior Performance

LFT‑G^® CPP‑LGF40AR

Exceptional Weathering Resistance: Retains high mechanical properties, ideal for outdoor structures

High Creep & Fatigue Endurance: Long fiber network ensures stable long‑term load‑bearing performance

Low Moisture & Chemical Sensitivity: Near‑zero water absorption, resistant to acids and automotive fluids

Broad Processing Window: Suitable for complex large‑part molding with excellent flow and low warpage

Short Fiber

Standard PP GF30

Rapid UV/Heat Degradation: Significant property loss after outdoor exposure, limited service life

High Creep & Stress Relaxation: Poor long‑term stability under sustained loads

Moisture & Chemical Attack: Susceptible to hydrolysis and solvent cracking in harsh environments

Narrow Processing Range: Higher warpage and limited part geometry capability

Overview of CPP‑LGF40AR Production

CPP-LGF40AR manufacturing

Introduction

CPP‑LGF40AR pellets are manufactured using a high‑precision continuous impregnation line, ensuring uniform fiber dispersion and consistent mechanical properties. The weathering additive package is integrated during compounding to provide long‑term UV and thermal protection. Here is our core production flow:

Step‑by‑Step Process

1. Fiber Roving Preparation: High‑quality E‑glass rovings are unwound and tension‑controlled for uniform spread, critical for achieving a consistent 40% fiber loading.

2. Polymer Melting & Additive Blending: PP resin, heat/UV stabilizers, and coupling agents are melted and homogenized in a twin‑screw extruder.

3. Impregnation (Core Step): The molten PP fully saturates the glass fibers in a proprietary impregnation die, ensuring complete wet‑out and optimal fiber‑matrix adhesion.

4. Pulling, Cooling & Stranding: The impregnated strand is pulled through a cooling bath to solidify the composite, preserving the critical 6‑25 mm fiber length.

5. Granulation: The cooled strand is cut into uniform 11‑12 mm pellets, ready for packaging and downstream processing.

Key Application Fields

Automotive Exterior & Underbody Shields

Engineered for engine under‑covers, wheel arch liners, and battery protection shields, PP‑LGF40 provides outstanding impact resistance and dimensional stability even after years of exposure to road salts, gravel, and temperature swings. Its long‑fiber reinforcement prevents sagging and warpage, while the weathering package ensures color retention and structural integrity over the vehicle's lifetime.

Superior Weathering & Salt Spray ResistanceLow‑Warpage & High Dimensional StabilityLong‑Term Impact Toughness

Outdoor Furniture & Garden Equipment

For patio chairs, table frames, planter boxes, and lawnmower decks, PP‑LGF40 offers the stiffness and creep resistance needed to support heavy loads while resisting UV‑induced degradation. The material's low moisture uptake prevents swelling or shrinking, maintaining tight joints and smooth operation over years of outdoor use.

UV‑Stabilized for Long‑Term Outdoor LifeHigh Creep Resistance for Load‑Bearing PartsExcellent Aesthetic Surface Quality

Industrial fluid handling & pump components

Industrial Fluid Handling & Pump Components

PP‑LGF40 is ideal for centrifugal pump impellers, valve bodies, and filter housings exposed to water, chemicals, and varying temperatures. Its long glass fiber network provides the necessary strength to withstand rotational stresses while maintaining dimensional precision for sealing surfaces. The material's low water absorption ensures stable performance in humid or wet environments.

Resistant to Wide pH Range & HumidityExcellent Fatigue Resistance for Rotating PartsTight Tolerances for Leak‑Free Sealing

product-339-198

Structural Brackets & Supporting Frames

Replacing die‑cast aluminum or steel in machinery frames, conveyor brackets, and solar panel mounts, PP‑LGF40 cuts weight by up to 30% while providing metal‑like stiffness and creep resistance. Its low creep ensures alignment of critical interfaces over the equipment's service life, reducing maintenance and re‑calibration frequency.

Lightweight Replacement for Metal High Creep Resistance for Long‑Term LoadExcellent Fatigue Strength for Dynamic Applications

FAQ

Q: What makes CPP‑LGF40AR different from standard PP‑LGF30 grades?

A: CPP‑LGF40AR incorporates a proprietary stabilization system that delivers superior resistance to UV, heat, and moisture aging. It retains over 90% of its initial mechanical properties after extended outdoor exposure, while standard grades can lose up to 40% of their strength.

Q: What is the continuous service temperature range for this compound?

A: CPP‑LGF40AR is designed for continuous use from -40°C to 120°C, with short‑term peak temperatures up to 150°C. Its heat deflection temperature (HDT) at 1.82 MPa is approximately 145°C, making it suitable for under‑hood and high‑ambient applications.

Q: Is CPP‑LGF40AR suitable for food‑contact applications?

A: While the base PP resin is food‑grade compliant, the specific additive package is designed for industrial applications. For food‑contact requirements, we can offer a customized version with approved stabilizers – please contact our technical team for more details.

LFT team