PC/PET
PC/PET is an alloy of polycarbonate with polyethylene terephthalate that adds chemical resistance and surface hardness to PC while keeping most of its impact strength.
Reference datasheet — PC/PET is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
PC/PET grades and fills
PC/PET is supplied in 8 conditions, soft to hard.
Compare all 8 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
High-impact / super-tough impact-modified grade | Pick when ductile failure is required down to −30/−40 °C, e.g. bumper fascia and energy absorbers. | 45 | 47 | 160 | 64 HRM |
FR V-0 | For electrical enclosures, chargers and appliance parts requiring UL 94 V-0 at 1.5 mm. | 50 | 52 | 70 | 74 HRM |
PCR / recycled-content grade | Sustainability-driven parts where 25–60 % post-consumer content is specified and colour is dark. | 50 | 52 | 90 | 70 HRM |
Mineral / talc filled grade | Choose for isotropic shrinkage, low warpage and Class-A paintable exterior panels. | 54 | 55 | 30 | 80 HRM |
Heat-stabilized / high-heat grade | For on-line painting and e-coat ovens or under-hood parts with elevated bake temperatures. | 56 | 57 | 90 | 76 HRM |
10 % glass-fiber reinforced | Modest stiffness and dimensional-stability boost while keeping useful ductility. | 75 | 8 | ||
20 % glass-fiber reinforced | Balanced structural grade for load-bearing brackets and covers needing warp control. | 95 | 5 | ||
30 % glass-fiber reinforced | Maximum stiffness/heat resistance of the family; accept brittleness and fiber read-through. | 115 | 3.5 |
Supply forms, finishes and certifications
Ways PC/PET is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
UV | UV-stabilized / weatherable grade | Grade option |
UnfilledDefault | Unfilled / Natural | Standard supply |
What is PC/PET?
PC/PET is an alloy of polycarbonate with polyethylene terephthalate that adds chemical resistance and surface hardness to PC while keeping most of its impact strength. The unfilled condition provides 55 MPa tensile strength and about 120 % elongation, and the grade list covers high-impact, GF10–GF30, mineral-filled, FR, UV, high-heat and PCR variants for injection-molded trim and housings. The blend is opaque, requires drying to avoid hydrolytic degradation, and tolerates only limited solvent exposure during bonding; PC/PBT is the nearest alternative and is generally preferred for large painted exterior panels. PC/PET has a density of 1.22 g/cm³ (0.0441 lb/in³), heavier than 61% of polymer grades. Its glass-transition temperature is 140°C (284 °F). PC/PET has a yield strength of 53 MPa (7.69 ksi) and a tensile strength of 55 MPa (7.98 ksi) — stronger than 59% of polymer grades. Elongation at break is 120% and the elastic modulus is 2.1 GPa (0.305 Msi).
What is PC/PET used for?
- automotive trim
- cosmetic housings
- appliance parts
- chemical-exposed components
PC/PET properties
Typical room-temperature values; bars are the position among polymer grades.
Physical5
PC/PET has a density of 1.22 g/cm³ (0.0441 lb/in³), heavier than 61% of polymer grades. Its glass-transition temperature is 140°C (284 °F).
Mechanical11
PC/PET has a yield strength of 53 MPa (7.69 ksi) and a tensile strength of 55 MPa (7.98 ksi) — stronger than 59% of polymer grades. Elongation at break is 120% and the elastic modulus is 2.1 GPa (0.305 Msi).
Thermal11
PC/PET is rated for continuous service to 100°C (212 °F). It conducts heat at 0.21 W/m·K (0.121 BTU/hr·ft·°F), better than 55% of polymer grades. Thermal expansion is 70 µm/m·K (38.9 µin/in·°F).
Electrical7
PC/PET is an electrical insulator with a dielectric strength of 22 kV/mm (558.8 V/mil) and a resistivity of 1×10¹⁴ Ω·m.
Chemical & Environmental2
UV resistance is fair.
Sustainability4
Producing a kilogram of PC/PET takes about 105 MJ of energy and emits 5.5 kg of CO₂ — more than 54% of polymer grades. Typical recycled content is 20%.
Manufacturability7
PC/PET's machinability is good (60/100, better than 51% of polymer grades); weldability very good (70/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the polymer family
Yield strength against density for every polymer grade FabDigit runs. PC/PET is highlighted; hover a dot for its name, or open the interactive family chart.
Working with PC/PET
Is PC/PET easy to machine?
Machines like PC but with less gumming; use sharp positive-rake tools, high speed and low feed with air cooling, and avoid coolants containing esters or amines.
Can PC/PET be welded?
Excellent ultrasonic, vibration and hot-plate welding; solvent bonding is limited — use polyurethane or epoxy adhesives instead.
Can PC/PET be formed, bent or molded?
Injection mold at 250–285 °C melt / 55–95 °C tool after drying 3–4 h at 100–110 °C to <0.02 % moisture; overheating or wet feed causes hydrolysis, splay and severe property loss.
PC/PET 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 |
|---|---|---|
| bisphenol-A polycarbonate (PC)continuous amorphous phase | 45 – 70 | 60 |
| poly(ethylene terephthalate) (PET)semi-crystalline phase giving chemical resistance | 20 – 45 | 30 |
| core-shell impact modifier (MBS/acrylic) | 3 – 12 | 7 |
| transesterification inhibitor / stabilizphosphite-type, critical for phase stability | 0.2 – 1.5 | 0.8 |
| glass fiber or mineral filleronly in reinforced variants | 0 – 30 | 0 |
What surface finishes work on PC/PET?
Readily painted and e-coated (a key reason for the alloy); textures, vacuum metallizing and pad printing are fine, but avoid aggressive solvent primers on unpainted stressed parts.
How much does PC/PET cost?
PC/PET is a premium-cost polymer ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
PC/PET — frequently asked
What is PC/PET used for?
PC/PET is typically used for automotive trim, cosmetic housings, appliance parts and chemical-exposed components. In short: harder surface than PC; good paint and e-coat adhesion; chemically tougher than PC.
What is the yield strength of PC/PET?
PC/PET has a typical yield strength of 53 MPa (7.69 ksi) and a tensile strength of 55 MPa (7.98 ksi) — stronger than 59% of polymer grades. Strength varies by condition: see the 8 listed tempers.
Is PC/PET easy to machine?
Reasonably — machinability is rated good (60/100, better than 51% of polymer grades). Machines like PC but with less gumming; use sharp positive-rake tools, high speed and low feed with air cooling, and avoid coolants containing esters or amines.
Can PC/PET be welded?
Yes — weldability is rated very good (70/100). Excellent ultrasonic, vibration and hot-plate welding; solvent bonding is limited — use polyurethane or epoxy adhesives instead.
What surface finishes work on PC/PET?
Readily painted and e-coated (a key reason for the alloy); textures, vacuum metallizing and pad printing are fine, but avoid aggressive solvent primers on unpainted stressed parts.
Can PC/PET be formed, bent or molded?
Injection mold at 250–285 °C melt / 55–95 °C tool after drying 3–4 h at 100–110 °C to <0.02 % moisture; overheating or wet feed causes hydrolysis, splay and severe property loss.
What is the maximum service temperature of PC/PET?
PC/PET is rated for continuous use to about 100°C (212 °F), and briefly to 130°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does PC/PET cost?
PC/PET is a premium-cost polymer ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- Xenoy PC/PET resin family datasheets — SABIC Specialties (2023)
- Makroblend PC/polyester blend datasheets — Covestro (2022)
- CAMPUS plastics database, ISO 10350 single-point data for PC+PET — CWFG/CAMPUS (2024)
- Engineered Materials Handbook Vol. 2: Engineering Plastics — ASM International (1988)
- ISO 7391 Plastics — Polycarbonate moulding and extrusion materials — ISO (2006)
- ASTM D256 / D638 / D790 / D648 test methods — ASTM International (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.