COC LOWTG
Grade
also TOPAS, Zeonor
LOWTG = low-Tg / film & blend grade
Pick for blown/cast film, shrink film and PE/PP blends where stiffness and moisture barrier are wanted at low processing temperature.
Values for the LOWTG condition
Other COC grades and fills
COC is listed in 3 conditions; see the grade overview at COC.
Compare all 3 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Impact-modified / elastomer-blend COC | Elastomer- or COC-elastomer-blended compounds for tougher packaging film and parts that must survive drop impact, at the cost of clarity and stiffness. | 35 | 40 | 60 | 72 Shore D |
LOWTGThis page Low-Tg / film & blend grade | Pick for blown/cast film, shrink film and PE/PP blends where stiffness and moisture barrier are wanted at low processing temperature. | — | 55 | 10 | — |
High-heat grade | Use where parts must survive steam autoclave, reflow-adjacent or hot-fill service while staying optically clear. | — | 66 | 3 | — |
What is COC LOWTG?
COC LOWTG is COC in the LOWTG grade — pick for blown/cast film, shrink film and PE/PP blends where stiffness and moisture barrier are wanted at low processing temperature. COC LOWTG has a yield strength of 60 MPa (8.7 ksi) and a tensile strength of 55 MPa (7.98 ksi) — stronger than 69% of polymer grades. Elongation at break is 10% and the elastic modulus is 2.6 GPa (0.377 Msi). COC LOWTG has a density of 1.02 g/cm³ (0.0368 lb/in³), lighter than 72% of polymer grades. Its glass-transition temperature is 78°C (172 °F).
Advantages
- Low moisture uptake — 0.01%, better than 97% of polymer grades
- Polishes to a fine finish — 85/100, better than 92% of polymer grades
Limitations
- Limited service temperature — 60°C (140 °F), worse than 87% of polymer grades
- Poor heat conductor — 0.15 W/m·K (0.0867 BTU/hr·ft·°F), worse than 80% of polymer grades
COC LOWTG properties
Typical room-temperature values for COC LOWTG; 11 are specific to this condition. Other listed values are COC reference data and may not represent this condition. Bars are the position among polymer grades.
Physical6
COC LOWTG has a density of 1.02 g/cm³ (0.0368 lb/in³), lighter than 72% of polymer grades. Its glass-transition temperature is 78°C (172 °F).
Mechanical9
COC LOWTG has a yield strength of 60 MPa (8.7 ksi) and a tensile strength of 55 MPa (7.98 ksi) — stronger than 69% of polymer grades. Elongation at break is 10% and the elastic modulus is 2.6 GPa (0.377 Msi).
Thermal11
COC LOWTG is rated for continuous service to 60°C (140 °F). It conducts heat at 0.15 W/m·K (0.0867 BTU/hr·ft·°F), worse than 80% of polymer grades. Thermal expansion is 65 µm/m·K (36.1 µin/in·°F).
Electrical7
COC LOWTG is an electrical insulator with a dielectric strength of 45 kV/mm (1,143 V/mil) and a resistivity of 1×10¹⁴ Ω·m.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), better than 74% of polymer grades. UV resistance is poor.
Sustainability3
Producing a kilogram of COC LOWTG takes about 110 MJ of energy and emits 4.5 kg of CO₂ — more than 64% of polymer grades. Typical recycled content is 0%.
Manufacturability8
COC LOWTG's machinability is good (60/100, better than 51% of polymer grades); weldability fair (50/100); formability good (55/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with COC LOWTG
Is COC easy to machine?
Machines cleanly with sharp single-flute or polished carbide tools and air cooling, but it is notch-sensitive — avoid sharp internal corners and aggressive feeds to prevent crazing/chipping; use no aromatic coolants.
Can COC be welded?
Joins well by laser transmission, ultrasonic, hot-plate and heat sealing; solvent bonding is limited to cyclohexane/decalin-type solvents, and adhesives need surface activation (plasma/corona) because of the non-polar surface.
Can COC be formed, bent or molded?
Injection moulds like a stiff amorphous resin: dry 2–4 h at 80–100 °C, melt 240–300 °C, mould 80–140 °C, shrinkage 0.4–0.7 %; low-Tg grades extrude into film and thermoform readily.
What surface finishes work on COC?
Reproduces polished tool surfaces to optical quality with no post-polish needed; printing, painting or metallising requires corona/plasma pretreatment, and UV-stable topcoats are advised for outdoor use.
COC 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 |
|---|---|---|
| norbornene (bicyclo[2.2.1]hept-2-ene) uncomonomer content sets Tg; higher norbornene = higher Tg | 20 – 60 | 45 |
| stabilizers/antioxidantstrace phenolic/phosphite package | ≈ 0.2 | 0.2 |
| ethylene unitsmetallocene-catalysed ethylene-norbornene copolymer (COC); COP grades are hydrogenated ring-opened norbornene homopolymer | balance | — |
COC LOWTG — frequently asked
What is COC LOWTG used for?
COC LOWTG is typically used for blister packaging, microfluidic diagnostic chips, optical lenses, vials/syringes and food packaging films. In short: glass-clear mouldable polyolefin; very low moisture absorption; brittle and notch-sensitive.
What is the yield strength of COC LOWTG?
COC LOWTG has a typical yield strength of 60 MPa (8.7 ksi) and a tensile strength of 55 MPa (7.98 ksi) — stronger than 69% of polymer grades. Strength varies by condition: see the 3 listed tempers.
Is COC LOWTG easy to machine?
Reasonably — machinability is rated good (60/100, better than 51% of polymer grades). Machines cleanly with sharp single-flute or polished carbide tools and air cooling, but it is notch-sensitive — avoid sharp internal corners and aggressive feeds to prevent crazing/chipping; use no aromatic coolants.
Can COC LOWTG be welded?
With care — weldability is rated fair (50/100). Joins well by laser transmission, ultrasonic, hot-plate and heat sealing; solvent bonding is limited to cyclohexane/decalin-type solvents, and adhesives need surface activation (plasma/corona) because of the non-polar surface.
What surface finishes work on COC LOWTG?
Reproduces polished tool surfaces to optical quality with no post-polish needed; printing, painting or metallising requires corona/plasma pretreatment, and UV-stable topcoats are advised for outdoor use.
Can COC LOWTG be formed, bent or molded?
Injection moulds like a stiff amorphous resin: dry 2–4 h at 80–100 °C, melt 240–300 °C, mould 80–140 °C, shrinkage 0.4–0.7 %; low-Tg grades extrude into film and thermoform readily.
What is the maximum service temperature of COC LOWTG?
COC LOWTG is rated for continuous use to about 60°C (140 °F), and briefly to 130°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- TOPAS COC grade datasheets (8007, 5013, 6013, 6015, 6017) and processing guide — TOPAS Advanced Polymers / Polyplastics (2023)
- ZEONEX / ZEONOR cyclo olefin polymer product data — Zeon Corporation (2023)
- APEL cyclo olefin copolymer product information — Mitsui Chemicals (2022)
- CAMPUS plastics ISO 10350 datasets for COC — CAMPUS / CWFG (2023)
- ISO 527, ISO 178, ISO 180, ISO 75, ISO 306 test methods — ISO (2019)
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.