This is the premium grade (Model:PP-LGF40AR) reinforces a high-strength 40% Long Glass Fiber skeleton with an advanced Heat Aging Resistance package with polypropylene resin.
√ Good aging heat resistance
√ good conductive electrical
√ Excellent Stiffness & Toughness Balance
LFT-G® PP LGF40-AR | The Heat-Stabilized Upgrade for PP GF40
LFT-G® 40% Long glass fiber PP (Copo) - Aging Resistance
Standard PP GF40 is strong, but it has an Achilles' heel: Heat Aging. Over time, exposure to elevated temperatures (e.g., under a car hood or inside a heater) causes the polymer matrix to oxidize, becoming yellow, brittle, and eventually cracking. LFT-G® PP-LGF40AR is the engineered antidote to this degradation.
This premium grade (Model: LGF40AR) reinforces a high-strength 40% Long Glass Fiber skeleton with an advanced Heat Aging Resistance package. It is specifically formulated to retain its mechanical properties-strength, stiffness, and impact resistance-over thousands of hours of continuous heat exposure (120°C - 150°C), bridging the gap between standard PP and expensive Polyamides (PA66).
√ Long-Term Thermal Stability: Prevents polymer chain breakdown and embrittlement, significantly extending the service life of parts in hot environments.
√ Creep Resistance at Temperature: The long fibers mechanically lock the part shape, preventing sagging or warping even when the material softens slightly in heat.
√ Copolymer Toughness: Uses a Copolymer base to ensure that even after heat aging, the material retains sufficient ductility to resist impact and vibration without shattering.
The Endurance Timeline: 150°C Oven Test
See the difference stabilization makes. Standard PP loses structural integrity quickly; LFT-G® AR grade endures.
0 Hours
Both Strong
500 Hours
Standard PP GF40
Starts Yellowing
800 Hours
Standard PP GF40
Brittle Failure
1,000+ Hours
LFT-G® LGF40-AR
Retains 80% Strength
Typical Material Properties (AR Grade)
The following values are typical data for LFT-G® PP-LGF40AR (Heat Stabilized) and are for reference only. Please contact us for the official Technical Data Sheet (TDS).
The following values are recommendations. We recommend desiccant / dry air dryers (moisture content below 0.1%).
To minimize fiber breakage and ensure optimal performance, a low-compression, general-purpose screw is highly recommended.
Parameter
Recommendation
Drying Temperature
80 - 100 °C
Drying Time
2 - 4 hours
Melt Temperature (Nozzle ③)
220 - 260 °C
Mold Temperature (Zone ②)
40 - 80 °C
Back Pressure
Low (to minimize fiber damage)
Case Study: Active Grille Shutter (AGS)
The "Heat Trap" Challenge
An AGS system sits directly behind the vehicle's front grille. It faces incoming road debris (impact) and traps engine heat (up to 110°C) when closed. Standard PP GF40 vanes were warping and becoming brittle after just 1000 hours of heat cycling, leading to mechanism jamming.
The LFT-G® AR Solution
The manufacturer switched to LFT-G® PP-LGF40AR. The 40% long fibers provided the stiffness to resist wind pressure, while the specialized heat stabilization package prevented oxidative degradation.
Result: Passed 3,000-hour heat aging tests with <5% loss in property, ensuring vehicle lifetime durability.
Applications for Thermal Zone LFT-PP
HOT AIR
Heater Fan Housings
Replaces metal in industrial heaters. LFT PP LGF40AR maintains dimensional stability in constant hot air streams without warping or emitting odors.
RADIANT HEAT
Engine Design Covers
A cost-effective alternative to PA6. With AR stabilization, it resists the radiant heat of the engine block for years without becoming brittle or discolored.
MOIST HEAT
Appliance Air Ducts
Used in clothes dryers and dishwashers. The material withstands cycles of hot, humid air, resisting both hydrolysis and thermal oxidation significantly better than standard PP.
People Also Ask
1. What is heat stabilized polypropylene?
A: Heat stabilized polypropylene (like our LGF40AR) contains special antioxidant additives that prevent the polymer chains from breaking down when exposed to heat over long periods. Without this, standard PP will become brittle and crack after prolonged exposure to temperatures above 100°C.
2. What is the maximum temperature for glass filled PP?
A: LFT-G® PP-LGF40AR has a Heat Deflection Temperature (HDT) of approximately 158°C (at 1.8 MPa load). For continuous service, it is generally rated for 120°C - 130°C use, depending on the load, making it a viable alternative to PA6 in many automotive applications.
3. What is the difference between PA66 GF30 and PP GF40 for heat?
A: PA66 GF30 can handle higher peak temperatures (>200°C). However, it absorbs moisture, which lowers its properties and dimensional stability. Heat Stabilized PP LGF40 (LFRT) offers better chemical resistance, zero moisture absorption, and is lighter and cheaper, making it the better choice for applications up to 130°C where stability is key.
Ready to Beat the Heat?
Ensure long-term durability in high-temperature environments with LFT-G® PP-LGF40AR. Contact our material specialists today to discuss your project or request a sample.
Standard PP GF40 is strong, but it has an Achilles' heel: Heat Aging. Over time, exposure to elevated temperatures (e.g., under a car hood or inside a heater) causes the polymer matrix to oxidize, becoming yellow, brittle, and eventually cracking. LFT-G® PP-LGF40AR is the engineered antidote to this degradation.
