mLLDPE UV-CB
Additive grade
ASTM D1248 · ISO 1872-1
UV-CB = carbon-black UV grade
Black, carbon-black-loaded version for maximum outdoor life in pipe liners, geomembrane and silage film; opaque only.
Values for the UV-CB condition
Other mLLDPE grades and fills
mLLDPE is listed in 7 conditions; see the grade overview at mLLDPE.
Compare all 7 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Metallocene plastomer / VLDPE (density 0.885–0.912) | Very-low-density mPE for ultra-low seal initiation temperature, soft flexible film, impact modification and blend toughening. | 6 | 22 | 900 | 33 Shore D |
Natural film grade, 1-octene copolymer | Choose when maximum dart impact, puncture resistance and low seal-initiation temperature are needed (heavy-duty sacks, sealant layers). | 10 | 33 | 850 | 47 Shore D |
NAT-C6Default Natural film grade, 1-hexene copolymer | Standard high-clarity blown-film mLLDPE for stretch/collation and packaging film; best balance of price and toughness. | 10 | 30 | 750 | 48 Shore D |
Slip / antiblock additivated film grade | Erucamide slip plus silica/talc antiblock for low COF film that runs on FFS and bagging lines. | 10 | 32 | 720 | 47 Shore D |
Injection-moulding grade | High melt-flow mLLDPE for thin-wall lids, closures and housewares needing ESCR and low-temperature impact. | 11 | 22 | 600 | 52 Shore D |
UV-CBThis page Carbon-black UV grade | Black, carbon-black-loaded version for maximum outdoor life in pipe liners, geomembrane and silage film; opaque only. | 11 | 28 | 700 | 50 Shore D |
Rotomoulding grade | Heat-stabilised, ground-powder mLLDPE for tanks and containers where impact at low temperature and ESCR matter. | 17 | 26 | 550 | 60 Shore D |
What is mLLDPE UV-CB?
mLLDPE UV-CB is mLLDPE in the UV-CB grade — black, carbon-black-loaded version for maximum outdoor life in pipe liners, geomembrane and silage film; opaque only. mLLDPE UV-CB has a yield strength of 11 MPa (1.6 ksi) and a tensile strength of 28 MPa (4.06 ksi) — weaker than 89% of polymer grades. Elongation at break is 700% and the elastic modulus is 0.28 GPa (0.0406 Msi). mLLDPE UV-CB has a density of 0.93 g/cm³ (0.0336 lb/in³), lighter than 78% of polymer grades. Its glass-transition temperature is -120°C (-184 °F). NAT-C6 is the default condition FabDigit quotes; UV-CB is available on request or by drawing note.
Advantages
- Readily welded — 92/100, better than 97% of polymer grades
- Low moisture uptake — 0.01%, better than 97% of polymer grades
- Ductile — tolerates forming and impact — 700%, better than 96% of polymer grades
- Low embodied carbon — 2 kg CO₂/kg, better than 96% of polymer grades
- Conducts heat well — 0.38 W/m·K (0.22 BTU/hr·ft·°F), better than 92% of polymer grades
Limitations
- Low strength — 11 MPa (1.6 ksi), worse than 89% of polymer grades
- Hard to polish — 30/100, worse than 82% of polymer grades
- High mold shrinkage — 2%, worse than 81% of polymer grades
- Difficult to machine — 45/100, worse than 78% of polymer grades
mLLDPE UV-CB properties
Typical room-temperature values for mLLDPE UV-CB; 29 are specific to this condition. Other listed values are mLLDPE reference data and may not represent this condition. Bars are the position among polymer grades.
Physical7
mLLDPE UV-CB has a density of 0.93 g/cm³ (0.0336 lb/in³), lighter than 78% of polymer grades. Its glass-transition temperature is -120°C (-184 °F).
Mechanical12
mLLDPE UV-CB has a yield strength of 11 MPa (1.6 ksi) and a tensile strength of 28 MPa (4.06 ksi) — weaker than 89% of polymer grades. Elongation at break is 700% and the elastic modulus is 0.28 GPa (0.0406 Msi).
Thermal11
mLLDPE UV-CB is rated for continuous service to 80°C (176 °F). It conducts heat at 0.38 W/m·K (0.22 BTU/hr·ft·°F), better than 92% of polymer grades. Thermal expansion is 180 µm/m·K (100 µin/in·°F).
Electrical7
mLLDPE UV-CB is an electrical insulator with a dielectric strength of 28 kV/mm (711.2 V/mil) and a resistivity of 1×10¹³ Ω·m.
Chemical & Environmental3
Corrosion resistance is excellent (92/100), better than 91% of polymer grades. UV resistance is excellent.
Sustainability4
Producing a kilogram of mLLDPE UV-CB takes about 80 MJ of energy and emits 2 kg of CO₂ — less than 85% of polymer grades. Typical recycled content is 0%.
Manufacturability8
mLLDPE UV-CB's machinability is fair (45/100, worse than 78% of polymer grades); weldability excellent (92/100); formability excellent (85/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with mLLDPE UV-CB
Is mLLDPE easy to machine?
Rarely machined; if needed use sharp positive-rake tools, high speed and low feed with air cooling — the material is soft, gummy and springs back, so hold generous tolerances.
Can mLLDPE be welded?
Excellent heat sealing, hot-plate, impulse and extrusion welding to other PE; low seal-initiation temperature is a key selling point; no solvent bonding and adhesives need corona/flame surface treatment.
Can mLLDPE be formed, bent or molded?
Mainly blown/cast film — narrow MWD gives high extruder pressure and melt-fracture risk, so use a PPA, wider die gaps and grooved-feed or high-torque screws; also rotomoulded (powder) and injection moulded at 190–235 °C with cold tooling.
What surface finishes work on mLLDPE?
Non-polar surface: corona or flame treat to 38–42 dyn/cm before printing, laminating or coating; no plating; pigmenting via masterbatch.
mLLDPE 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 |
|---|---|---|
| 1-hexene or 1-octene comonomershort-chain branching from single-site metallocene catalyst; sets density/Tm | 3 – 12 | 8 |
| antioxidant / process stabiliserhindered phenol + phosphite | 0.05 – 0.3 | 0.15 |
| slip & antiblock additiveserucamide + silica/talc, film grades only | 0 – 0.5 | 0.2 |
| polymer processing aid (fluoroelastomer)reduces melt fracture typical of narrow-MWD mPE | 0 – 0.1 | 0.05 |
| ethylene (repeat unit)backbone monomer | ≥ 88 (balance) | — |
mLLDPE UV-CB — frequently asked
What is mLLDPE UV-CB used for?
mLLDPE UV-CB is typically used for high-performance stretch film, heavy-duty shipping sacks, multilayer food packaging film and agricultural film. In short: toughest LLDPE film resin; low seal-initiation temperature; narrow-MWD metallocene grade.
What is the yield strength of mLLDPE UV-CB?
mLLDPE UV-CB has a typical yield strength of 11 MPa (1.6 ksi) and a tensile strength of 28 MPa (4.06 ksi) — weaker than 89% of polymer grades. Strength varies by condition: see the 7 listed tempers.
Is mLLDPE UV-CB easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 78% of polymer grades). Rarely machined; if needed use sharp positive-rake tools, high speed and low feed with air cooling — the material is soft, gummy and springs back, so hold generous tolerances.
Can mLLDPE UV-CB be welded?
Yes — weldability is rated excellent (92/100). Excellent heat sealing, hot-plate, impulse and extrusion welding to other PE; low seal-initiation temperature is a key selling point; no solvent bonding and adhesives need corona/flame surface treatment.
What surface finishes work on mLLDPE UV-CB?
Non-polar surface: corona or flame treat to 38–42 dyn/cm before printing, laminating or coating; no plating; pigmenting via masterbatch.
Can mLLDPE UV-CB be formed, bent or molded?
Mainly blown/cast film — narrow MWD gives high extruder pressure and melt-fracture risk, so use a PPA, wider die gaps and grooved-feed or high-torque screws; also rotomoulded (powder) and injection moulded at 190–235 °C with cold tooling.
What is the maximum service temperature of mLLDPE UV-CB?
mLLDPE UV-CB is rated for continuous use to about 80°C (176 °F), and briefly to 95°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between mLLDPE NAT-C6 and mLLDPE ROTO?
NAT-C6 is the default condition — standard high-clarity blown-film mLLDPE for stretch/collation and packaging film; best balance of price and toughness. ROTO: heat-stabilised, ground-powder mLLDPE for tanks and containers where impact at low temperature and ESCR matter. Yield strength is 10 MPa in NAT-C6 versus 17 MPa in ROTO.
Sources
- ASTM D1248 — Standard Specification for Polyethylene Plastics Extrusion Materials — ASTM International (2016)
- ISO 1872-1 — Plastics: Polyethylene (PE) moulding and extrusion materials, designation system — ISO (2023)
- ASTM D1238 — Melt Flow Rates of Thermoplastics by Extrusion Plastometer — ASTM International (2023)
- Exceed / Enable metallocene PE film resin datasheets — ExxonMobil Chemical (2023)
- ELITE enhanced polyethylene and AFFINITY polyolefin plastomer datasheets — Dow (2023)
- CAMPUS / plastics property database — LLDPE film and injection grades — CWFG / CAMPUS consortium (2024)
- ASM Engineered Materials Handbook, Vol. 2: Engineering Plastics — ASM International (1988)
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.