What is LGF30 PP Material?
LFT-G® PP-LGF30FR is a 30% long glass fiber reinforced flame-retardant polypropylene compound, engineered for electric vehicle battery housings and high-temperature structural applications where fire safety and dimensional stability are paramount. The long glass fiber network provides a continuous reinforcement skeleton, evenly distributing loads and minimizing anisotropic shrinkage.
Key Specifications
Long vs. Short: The Fiber Difference
The long glass fiber network in LFT‑G® PP‑LGF30FR delivers a decisive performance advantage over conventional short‑fiber PP GF30FR. With higher strength, exceptional impact resistance, and superior thermal stability, it is the ideal material for EV battery housings and structural components that demand both safety and durability.
Choose LFT‑G® PP‑LGF30FR for lightweight metal replacement and uncompromising safety in next‑generation energy systems.
Technical Data Sheet
Processing Guidelines – Injection Molding
Pre-drying
90–100°C / 2–4h
Moisture < 0.1%
Injection
Melt 210–250°C
Mold 38–69°C
Pressure 80–120 MPa
Tooling
Low-compression screw
Full round runners (Ø5–6mm)
L/D 18:1–24:1
Field Proven
Challenge
A European off‑highway electric mining vehicle manufacturer was using heavy, welded steel battery enclosures. The 80 kg assembly suffered from premature weld fatigue due to high‑frequency vibration, corrosion from acidic mine water, and poor thermal management – aluminum alternatives added insulation layers and still weighed over 45 kg.
Solution
The team switched to a single‑piece injection‑molded enclosure using LFT‑G® PP‑LGF30FR (30% long glass fiber, V‑0 flame‑retardant). The long‑fiber skeleton delivered metal‑comparable stiffness while the polymer matrix provided natural chemical resistance – eliminating coatings. Integral cooling channels, mounting bosses, and sensor brackets were molded in, consolidating over 20 previously separate parts.
Results
✅️65% weight reduction
✅️Zero structural failures
✅️75% lower warranty costs
✅️UL94 V‑0 certified
Q: How does PP LGF30 compare to standard short‑fiber PP GF30?
A: LFT-G® PP‑LGF30FR delivers 3× higher notched impact strength and 40% better creep resistance due to its continuous long glass fiber network. This eliminates the warpage and dimensional instability common with short‑fiber PP GF30.
Q: How does PP LGF30 improve battery enclosure fire safety and thermal runaway protection?
A: Yes. LFT-G® PP‑LGF30FR achieves UL94 V‑0 flame retardancy and self‑extinguishes within seconds. Its low thermal conductivity acts as a heat barrier, helping contain thermal runaway and prevent cascade failure.
Q: What weight savings and cost benefits can PP LGF30 deliver versus metal enclosures?
A: A LFT-G® PP‑LGF30FR enclosure weighs 25–35 kg versus 45 kg+ for aluminum-30–50% lighter. It also consolidates 20+ metal components into a single injection‑molded part, cutting assembly time and warranty costs.
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