LFT-G® CPP-LGF40YD is a 40% long glass fiber reinforced copolymer polypropylene, utilizing a continuous 3D fiber network to provide enhanced structural integrity for demanding water pump components. Key advantages include: √ Superior creep resistance √ Excellent chemical and hydrolysis resistance √ High impact toughness and dimensional stability √ Enhanced thermal capability
LFT-G® CPP-LGF40 Water Pump Material is a 40% long glass fiber‑reinforced copolymer polypropylene specifically engineered for high‑performance centrifugal pump parts. Delivering superior strength, corrosion resistance, and durability under demanding operating conditions, it comes in ready‑to‑mold pellets that streamline production and ensure consistent quality.
LFT-G® CPP-LGF40 combines the chemical resistance of copolymer polypropylene with a continuous long‑glass‑fiber skeleton. Unlike conventional short‑glass‑fiber PP, the elongated fibers form a three‑dimensional reinforcing network that dramatically improves creep resistance, impact toughness, and dimensional stability - essential properties for pump impellers, diffusers, and volute housings operating under cyclic hydraulic loads.
Supplied as uniform plastic pellets, CPP-LGF40 processes easily on standard injection molding machines, enabling precision parts with low warpage and repeatable quality. This engineering thermoplastic is the new benchmark for metal replacement in water pump applications.
Key Material Characteristics
⚡
High Tensile Strength
Long glass fiber reinforcement creates a robust internal skeleton, delivering exceptional tensile strength far exceeding standard short-fiber polypropylene compounds.
Metal Replacement Grade
📐
Flexural Modulus
Outstanding structural stiffness ensures pump components maintain their precise geometric shape even under continuous high-pressure operating conditions.
Load-Resistant Stiffness
💧
Hydrolytic Stability
Excellent water resistance, glycol-based coolants, and mild industrial chemicals, with negligible water absorption to prevent dimensional swelling.
Submersible Grade
🛡️
Impact Toughness
Superior notched impact toughness, with long fibers effectively bridging micro-cracks and absorbing energy to prevent catastrophic component failure.
Crack-Bridging Toughness
⏳
Creep Resistance
The interlocked three-dimensional fiber network minimizes viscoelastic creep, maintaining structural integrity under prolonged mechanical loads.
Long-Term Durability
🎯
Dimensional Precision
Uniform and isotropic shrinkage characteristics produce tight-tolerance parts with minimal warpage, essential for optimal impeller balance.
Tight Tolerance Parts
Performance Balance: LGF vs. SGF
SGF-PP Short Glass Fiber
CPP-LGF40★ Long Glass Fiber
The static balance scale illustrates the real‑world mechanical advantage of long glass fiber technology over short glass fiber PP.
Property
SGF-PP (Short Fiber)
CPP-LGF40 (Long Fiber)
Tensile Strength
75 – 85 MPa
120 – 135 MPa (+55%)
Flexural Modulus
4,500 – 5,500 MPa
7,500 – 8,500 MPa (+50%)
Charpy Impact
8 – 12 kJ/m²
22 – 30 kJ/m² (+150%)
Creep Resistance
Moderate
Excellent
Fiber Length Retention
<0.5 mm (degraded)
2.0 – 4.0 mm (retained)
Dimensional Stability
Fair
Superior
⚖️ Every performance metric decisively favors CPP-LGF40 - the clear choice for demanding water pump applications.
LFT-G® CPP-LGF40 Industrial Circulating Water Pump Upgrade Case
A leading domestic industrial pump manufacturer supplies circulating cooling water pump systems for a large petrochemical park. Traditional cast iron pump bodies suffered from severe corrosion in long-term chlorine-containing cooling water environments, resulting in prohibitively high maintenance costs.
Customer Challenge
Traditional gray cast iron and 304 stainless steel pumps face four intractable problems in industrial circulating water conditions:
Cast iron pump bodies develop severe pitting and rust within 3-5 years, requiring annual shutdowns for seal replacement
Stainless steel impellers experience cavitation erosion in high-velocity sediment-laden water, with efficiency declining year by year
Heavy metal components require large lifting equipment for installation and maintenance, driving up labor costs
Long processing cycles with custom orders taking over 45 days to deliver, and are unable to meet urgent customer demands
CPP-LGF40 Custom Solution
Our purpose-formulated material provided the perfect metal replacement:
Hydrolysis-resistant copolymer matrix withstands 60°C chlorinated water
40% long glass fiber network handles 1.6MPa operating pressure
One-piece injection molding eliminates 12 parts and 8 sealing points
Smoother flow channels reduce hydraulic losses by 80% vs. castings
CPP-LGF40 delivers unmatched corrosion resistance, mechanical strength, and cost advantages for industrial water pumps. This retrofit demonstrates how long glass fiber technology can dramatically extend equipment lifespan while reducing total lifecycle costs for end users.
FAQ
Q: Why is LFT-G®CPP-LGF40 more suitable for water pump parts than short-glass-fiber PP?
A: LFT-G® CPP-LGF40's 3D long-glass-fiber network provides far better creep resistance, impact toughness, and dimensional stability than short-fiber PP. This is critical for pump components under cyclic hydraulic loads, ensuring longer service life and reliable sealing.
Q: What are the key injection molding tips for LFT-G®CPP-LGF40?
A: Use a screw with an L/D ratio ≥20:1 and control melt temperature (200–230°C) and injection speed to minimize fiber breakage. This preserves mechanical properties and reduces surface defects.
Q: Can LFT-G®CPP-LGF40 withstand long-term exposure to high-temperature coolants?
A: Yes. The copolymer PP matrix resists coolants, and the long-fiber reinforcement maintains strength and dimensional stability at continuous temperatures up to 120°C, making it ideal for modern pump housings.
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