Laperos GF40
Reinforced grade
ISO LCP
GF40 = 40% glass-fiber reinforced
Choose for maximum stiffness, lowest CTE and highest HDT where flow length is short and brittleness is acceptable.
Values for the GF40 condition
Other Laperos grades and fills
Laperos is listed in 13 conditions; see the grade overview at Laperos.
Compare all 13 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Mineral filled | Pick for isotropic shrinkage, low warpage and good surface on flat covers and shields where strength can be traded away. | — | 110 | 1.5 | — |
Lubricated / low-wear grade | Pick for small unlubricated bearings, bushes and sliding electronics parts needing low friction at 150–200 °C. | — | 120 | 1.8 | 86 Shore D |
GF + mineral hybrid, low-warpage high-heat | Best compromise for large flat SMT parts that must survive lead-free reflow with minimal warpage and dimensional drift. | — | 130 | 1.6 | — |
15% glass-fiber reinforced | Use when some toughness and easier flow into very thin walls matter more than stiffness. | — | 145 | 3 | — |
halogen-free flame retardant listing (thin-section V-0) | Specify when UL 94 V-0 at 0.2–0.4 mm plus RTI listing is a contractual requirement; LCP achieves it without added halogen or phosphorus. | — | 145 | 2 | 88 Shore D |
ESD / conductive | Use for IC trays, burn-in sockets and handling parts needing static dissipation at high temperature. | — | 145 | 1.6 | 89 Shore D |
High-heat series | Choose when parts see 260–290 °C reflow, hot-solder dipping or continuous >230 °C service and higher melt processing temperature is acceptable. | — | 150 | 1.8 | 89 Shore D |
High-flow thin-wall grade | Pick for fine-pitch connectors and micro-parts where fill of sub-0.3 mm walls and long flow paths dominates the design. | — | 150 | 2.2 | 87 Shore D |
Low-dielectric / high-frequency grade | Choose for antenna carriers, mmWave connectors and MID parts where low Dk/Df at GHz frequencies is the governing property. | — | 150 | 2 | 87 Shore D |
GF40This page 40% glass-fiber reinforced | Choose for maximum stiffness, lowest CTE and highest HDT where flow length is short and brittleness is acceptable. | — | 160 | 1.8 | — |
GF30Default 30% glass-fiber reinforced | The industry default: best all-round balance of flow, stiffness, reflow resistance and price for SMT connectors and coil bobbins. | — | 165 | 2.5 | — |
Unfilled / Natural | Pick when maximum toughness, near-zero CTE in flow direction, lowest dielectric loss or film/fiber extrusion is needed; rarely used for structural injection parts. | — | 175 | 3.5 | — |
Carbon-fiber reinforced | Use for maximum specific stiffness, dimensional stability and semi-conductive/EMI parts such as test sockets and probe housings. | — | 180 | 1.4 | — |
What is Laperos GF40?
Laperos GF40 is Laperos in the GF40 grade — choose for maximum stiffness, lowest CTE and highest HDT where flow length is short and brittleness is acceptable. Laperos GF40 has a tensile strength of 160 MPa (23.2 ksi), stronger than 96% of polymer grades. Elongation at break is 1.8% and the elastic modulus is 19 GPa (2.76 Msi). Laperos GF40 has a density of 1.75 g/cm³ (0.0632 lb/in³), heavier than 95% of polymer grades. Its glass-transition temperature is 120°C (248 °F). GF30 is the default condition FabDigit quotes; GF40 is available on request or by drawing note.
Advantages
- Stiff — 19 GPa (2.76 Msi), better than 100% of polymer grades
- Low, predictable mold shrinkage — 0.05%, better than 100% of polymer grades
- Conducts heat well — 0.45 W/m·K (0.26 BTU/hr·ft·°F), better than 97% of polymer grades
- Low moisture uptake — 0.02%, better than 92% of polymer grades
- High service temperature — 220°C (428 °F), better than 89% of polymer grades
Limitations
- Limited ductility — 1.8%, worse than 97% of polymer grades
- Heavy — 1.75 g/cm³ (0.0632 lb/in³), worse than 95% of polymer grades
- High embodied carbon — 9 kg CO₂/kg, worse than 88% of polymer grades
- Difficult to machine — 32/100, worse than 85% of polymer grades
- Limited formability — 15/100, worse than 79% of polymer grades
Laperos GF40 properties
Typical room-temperature values for Laperos GF40; 12 are specific to this condition. Other listed values are Laperos reference data and may not represent this condition. Bars are the position among polymer grades.
Physical5
Laperos GF40 has a density of 1.75 g/cm³ (0.0632 lb/in³), heavier than 95% of polymer grades. Its glass-transition temperature is 120°C (248 °F).
Mechanical10
Laperos GF40 has a tensile strength of 160 MPa (23.2 ksi), stronger than 96% of polymer grades. Elongation at break is 1.8% and the elastic modulus is 19 GPa (2.76 Msi).
Thermal10
Laperos GF40 is rated for continuous service to 220°C (428 °F). It conducts heat at 0.45 W/m·K (0.26 BTU/hr·ft·°F), better than 97% of polymer grades. Thermal expansion is 6 µm/m·K (3.33 µin/in·°F).
Electrical7
Laperos GF40 is an electrical insulator with a dielectric strength of 35 kV/mm (889 V/mil) and a resistivity of 1×10¹⁴ Ω·m.
Chemical & Environmental3
Corrosion resistance is excellent (90/100), better than 82% of polymer grades. UV resistance is fair.
Sustainability3
Producing a kilogram of Laperos GF40 takes about 190 MJ of energy and emits 9 kg of CO₂ — more than 88% of polymer grades. Typical recycled content is 0%.
Manufacturability7
Laperos GF40's machinability is poor (32/100, worse than 85% of polymer grades); weldability poor (25/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Laperos GF40
Is Laperos easy to machine?
Machines cleanly but is abrasive and prone to skin delamination and chipping — use sharp carbide/diamond tooling, high speed, light feed and support thin walls; molded-in features are preferred to machining.
Can Laperos be welded?
Not solvent- or hot-plate weldable in practice; laser and ultrasonic welding work only with joint design allowing for very weak, highly oriented weld interfaces — snap-fits, insert molding and adhesive-free press fits are the norm.
Can Laperos be formed, bent or molded?
Dry 3–4 h at 130–150 °C, melt 290–330 °C (high-heat series 340–390 °C), mold 60–130 °C, very fast injection with generous venting; design for near-zero flow shrinkage but 4–8× higher transverse shrinkage and place gates to control weld lines.
What surface finishes work on Laperos?
Accepts vacuum metallization, sputtering, LDS/laser-activated plating and reflow soldering directly; painting and adhesive bonding need plasma or corona pre-treatment because the surface is chemically inert and fibrous.
Laperos chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| p-hydroxybenzoic acid (HBA) unitprincipal rigid-rod aromatic ester monomer | 45 – 80 | 60 |
| aromatic diol (4,4'-biphenol / hydroquinType E chemistry | 5 – 20 | 12 |
| terephthalic / isophthalic acid unitType E chemistry | 5 – 20 | 12 |
| 6-hydroxy-2-naphthoic acid (HNA) unitType A chemistry (alternative comonomer) | 0 – 35 | 25 |
| glass fiberchopped E-glass, default GF30 grade | 0 – 45 | 30 |
| mineral filler (talc/mica/wollastonite)in low-warpage / mineral series | 0 – 45 | 0 |
| polymer matrixbalance is the wholly aromatic thermotropic polyester | balance | — |
Laperos GF40 — frequently asked
What is Laperos GF40 used for?
Laperos GF40 is typically used for smartphone antenna carriers, SMT connectors, micro-gears and sensor housings. In short: high-flow thin-wall LCP; wide functional grade range; reflow-compatible molded parts.
What is the tensile strength of Laperos GF40?
Laperos GF40 has a typical tensile strength of 160 MPa (23.2 ksi) — stronger than 96% of polymer grades. Strength varies by condition: see the 13 listed tempers.
Is Laperos GF40 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 85% of polymer grades). Machines cleanly but is abrasive and prone to skin delamination and chipping — use sharp carbide/diamond tooling, high speed, light feed and support thin walls; molded-in features are preferred to machining.
Can Laperos GF40 be welded?
Not readily — weldability is rated poor (25/100). Not solvent- or hot-plate weldable in practice; laser and ultrasonic welding work only with joint design allowing for very weak, highly oriented weld interfaces — snap-fits, insert molding and adhesive-free press fits are the norm.
What surface finishes work on Laperos GF40?
Accepts vacuum metallization, sputtering, LDS/laser-activated plating and reflow soldering directly; painting and adhesive bonding need plasma or corona pre-treatment because the surface is chemically inert and fibrous.
Can Laperos GF40 be formed, bent or molded?
Dry 3–4 h at 130–150 °C, melt 290–330 °C (high-heat series 340–390 °C), mold 60–130 °C, very fast injection with generous venting; design for near-zero flow shrinkage but 4–8× higher transverse shrinkage and place gates to control weld lines.
What is the maximum service temperature of Laperos GF40?
Laperos GF40 is rated for continuous use to about 220°C (428 °F), and briefly to 280°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- LAPEROS Liquid Crystal Polymer product and grade datasheets — Polyplastics Co., Ltd. (2024)
- CAMPUS plastics datasheets — LCP GF30 / mineral-filled grades (ISO 10350-1) — CWFG / CAMPUS (2024)
- Engineered Materials Handbook, Vol. 2: Engineering Plastics — liquid crystal polymers — ASM International (1988)
- ISO 527-1/-2, ISO 178, ISO 75-1/-2, ISO 180 test methods — ISO (2019)
- UL 94 Tests for Flammability of Plastic Materials (Yellow Card listings for LCP) — UL Solutions (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.