PP LGF30 Technical Data
LFT-G® PP LGF30 is a 30% long glass fiber reinforced polypropylene (homopolymer), engineered for structural parts that replace short-fiber PP and die-cast aluminum.
| Property | Specification |
|---|---|
| Product Grade | LFT-G® PP LGF30 |
| Material Type | Long Glass Fiber Reinforced Thermoplastic (LFT) |
| Polymer Matrix | Polypropylene (Homopolymer, HPP) |
| Glass Fiber Content | 30% |
| Available Color | Black / Natural |
| Form | Pellets (Length 10–12mm, customizable 6–25mm) |
Typical Material Properties of PP LGF30
| Property | Value | Standard |
|---|---|---|
| Density | 1.12 g/cm³ | ASTM D-792 |
| Molding Shrinkage | 0.2–0.3% | ASTM D-955 |
| Tensile Strength | 113 MPa | ISO 527 |
| Tensile Modulus | 6,822 MPa | ISO 527 |
| Tensile Elongation | 1.8–2.8% | ISO 527 |
| Flexural Strength | 151 MPa | ASTM D-790 |
| Flexural Modulus | 4,789 MPa | ASTM D-790 |
| Notched Charpy Impact | 32 kJ/m² | ISO 180 |
| HDT (1.8 MPa) | 159 °C | ISO 75-2 |
| Flame Retardant | HB @ 1.5 mm | UL-94 |
Typical values are based on limited laboratory test specimens and are provided for reference only. They are not intended as specification limits. Actual molded-part performance can vary with test conditions, specimen preparation, processing conditions, part design and production batch. Source: official TDS LFT-G® PP-LGF30-NG03-2 (Revised 30/06/2026, version A3).
Mold Compatibility Check: PP LGF30 requires a gate diameter of 5–6 mm. Pin-point gates are not suitable. Please confirm your mold meets this requirement before requesting a trial sample. If your gate is smaller than 5 mm, PP LGF30 cannot be molded in your existing tool - contact us to review alternatives.
PP GF30 vs PP LGF30: Why Engineers Upgrade
PP LGF30 is not a stronger PP GF30. It is a different reinforcement system. In short-fiber PP GF30, the fibres break down to < 3 mm during molding and cannot form a load-bearing skeleton. In PP LGF30, the long fibres survive molding and form a skeleton that carries load, resists creep and absorbs impact. That skeleton is why PP LGF30 holds up under sustained load and repeated impact where short-fiber grades fatigue and crack. The result is a step change in toughness and long-term performance, not a marginal gain.
It is not a drop-in replacement. PP LGF30 needs a gate diameter of 5–6 mm, and pin-point gates are not suitable (see the check above). When the mold meets this requirement, PP LGF30 can replace PP GF30 in structural parts, and in many cases die-cast aluminum, at less than half the weight.
Schematic, not to scale: long fibres (10–12 mm) form a load-bearing skeleton, while short fibres (< 3 mm) stay fragmented.
| Property | PP GF30 (Short Fiber) | PP LGF30 (Long Fiber) |
|---|---|---|
| Fiber length in pellet | Short fibres (< 3 mm) | 10–12 mm |
| Fiber skeleton in molded part | Fragmented, no load-bearing skeleton | Load-bearing skeleton |
| Notched impact strength | Lower and inconsistent | 32 kJ/m² (ISO 180) |
| Creep resistance | Lower | Higher |
| Fatigue resistance | Lower | Higher |
| Warpage / shrinkage | Higher, less stable | Lower, more stable |
| Mold requirement | Standard gates | Gate diameter 5–6 mm; no pin-point gates |
PP LGF30 values are from the official TDS (NG03-2). Short-fiber performance varies by grade and supplier. This table compares reinforcement mechanisms, not one competing grade. For a number-to-number comparison, specify the competing grade's TDS.
PP LGF30 Applications
Automotive Structural Modules
Front-end carriers, door modules and instrument panel brackets need stiffness at low weight. PP LGF30's 30% long-fiber skeleton provides the stiffness-to-weight balance these modules require, with the dimensional stability to hold tolerances across large parts. Its 159 °C HDT (ISO 75-2) also suits parts near heat sources.
Automotive Seat & Support Structures
Seat frames, support structures and reinforced carriers need stiffness and dimensional stability while keeping weight down. PP LGF30 is a candidate for non-critical structural components where the balance of stiffness, impact performance and weight matters. The 32 kJ/m² Charpy impact (ISO 180) supports parts that must survive assembly and in-service knocks.
Industrial Power Tool Housings
Power tool housings face vibration, assembly loads and repeated impact. PP LGF30's long-fiber reinforcement resists deformation and absorbs impact better than short-fiber PP, while keeping housings light for handheld use. Its low density (1.12 g/cm³) keeps handheld tools light without giving up rigidity.
How to Mold PP LGF30?
PP LGF30 runs on standard injection molding machines, with two non-negotiable items: a gate diameter of 5–6 mm and pre-drying.
Schematic, not to scale. Numbers refer to the steps below.
① Drying: Dry the pellets for 2–4 hours at 80–90°C, and keep moisture below 0.1%. Long-fiber pellets pick up surface moisture, and wet pellets degrade during molding.
② Melting: Melt at 210–250°C. Use a low-shear screw and avoid overheating, which breaks fibres and degrades the material.
③ Injection: Inject at 69–103 MPa. Keep flow paths open and shear low so the long fibres survive to the part.
④ Gate: Use a gate diameter of 5–6 mm. Pin-point gates are not suitable: they shear the fibres at the gate and destroy the reinforcement. If your gate is smaller than 5 mm, do not run PP LGF30 in that tool.
⑤ Mold: Hold the mold at 38–69°C. Confirm the mold temperature by measurement, not by the machine setting, since mold temperature affects appearance and dimensional stability.
Processing parameters are from the official TDS (NG03-2). Actual settings depend on part design, mold and machine. Validate with a trial sample before production.
Which PP LGF30 Grade Should You Choose?
Start from the job, not the datasheet. The general grade (PP LGF30) is the default answer for structural parts. Move to a special grade only when a specific requirement forces it - outdoor exposure, sustained heat, higher performance, or a tighter budget. Each special grade is a trade-off, not an upgrade on every property. Request the TDS of the grade you choose, and confirm it with a trial sample.
| If you need | Choose | Next step |
|---|---|---|
| General structural parts with no special requirement | HPP LGF30 (General) | Request TDS & trial sample |
| A lower-cost option for less demanding parts | HPP LGF30-C (Economical) | Request the HPP LGF30-C TDS |
| Parts exposed to heat and aging | HPP LGF30 AR (Aging & Heat Retardant) | Contact us for the TDS |
| Higher stiffness and strength than the general grade | HPP HLGF30 (High Performance) | Request the HPP HLGF30 TDS |
| Outdoor parts exposed to UV | HPP LGF30 V (UV Retardant) | Contact us for the TDS |
Each variant has its own TDS. Do not apply the general grade's values to a special grade - request the TDS of the grade you choose.
HPP LGF30 AR and HPP LGF30 V are available on request. Their TDS pages are not published yet - contact us for the TDS.
FAQ
Can PP LGF30 replace die-cast aluminum?
Yes, for brackets, housings and carriers where weight matters - at less than half the weight. Wall thickness and rib design must be re-engineered for plastic; it is not a like-for-like swap.
What mold gate size does PP LGF30 need?
A gate diameter of 5–6 mm. Pin-point gates are not suitable. See the Mold Compatibility Check above.
What is the trial order quantity for PP LGF30?
25 kg. That is the trial MOQ for a first sample order. Contact us to arrange it.
Does the general grade of PP LGF30 resist UV?
No. The general grade does not include UV performance. For outdoor parts, choose HPP LGF30 V in the selection table above.
What does the 159 °C HDT of PP LGF30 mean in practice?
It is the temperature at which the material deflects under 1.8 MPa load (ISO 75-2). For sustained high-temperature service, choose HPP LGF30 AR in the selection table above.
What colors is PP LGF30 available in?
Black and natural. See the identity table above.
Request PP LGF30 TDS & Trial Sample
Send us your part drawing and current grade. We will confirm whether PP LGF30 fits, recommend the right variant if needed, and arrange a trial sample.
Ordering grade: LFT-G® PP-LGF30-NG03-2 - 30% LGF, homopolymer (HPP), natural.
Email: Candyhu@lfrtplastic.com
WhatsApp: +86 139 5009 5707
Related Grades
PP LGF20
Lower fiber content for parts where toughness and flow matter more than stiffness.
PP LGF30
30% long glass fiber reinforcement for structural parts.
Current Grade
PP LGF40
Higher fiber content for parts that need more stiffness than PP LGF30 provides.
Hot Tags: PP LGF30, 30% long glass fiber polypropylene, LFT PP LGF30, PP GF30 upgrade
