Polyethylene Linear Low Density, PE-LLD (molding and extrusion) Material Data Sheet

Designation

Linear low density polyethylene / LLDPE (Low/medium density, linear copolymer)

Tradenames

Admer, Adpoly, Adtex, Alkamix, Alkathene, Alkatuff, Arak, Aspun, Asrene, Axeleron, Bapolene, Borealis, Borecene, Borecene Compact, Borlite, Borstar, Bynel, Certene, Clearflex, Comai, Cosmolex, Daelim, Dowlex, Dupont Bynel, Eleme, El-Lene, Eltex, Enable, Etilinas, Evalene, Evolue, Exceed, Exelene, Flexirene, Flexus, Formolene, Formolene Formax, Fusabond, G-Lene, Halene, Hanwha, Harmorex-Ll, Hifor, Hifor Xtreme, Icorene, Indothene, Ineos, Innoplus, J-Rex, Kemcor, Lanufene, Linathene, Liten, Lotrène, Lumicene, Marflex, Marlex, Marpol, Marvel, Moretec, Mtegrity, Neftekhim, Neo-Zex, Nexus, Novapol, Novatec, Orevac, Osterlene, Petro Rabigh, Petrothene, Petrothene Select, Plexar, Polyaxis, Polycompo, Prixene, Qamar, Ravago, Reclair, Relene, Samsung Total, Sasol, Sclair, Seetec, Sinpolene, Stamylex, Starflex, Sumilite, Surespec, Surpass, Tabond, Taisox, Titanceed, Titanex, Titanvene, Tuflin, Ultzex, Umerit, Venelene, Westlake, Yuclair

Typical uses

Chemically resistant fillings, bowls, lids, gaskets, toys, containers, packaging film, film liners, squeeze bottles, heat sealed films for metal laminates, pipe, cable covering, core in uhf cables.

Compositional summary

Copolymer of (CH2CH2)n with alpha olefins, such as 1-butene, 1-hexene, and 1-octene

Material family	Plastic (thermoplastic, semi-crystalline)
Base material	PE-LLD (Polyethylene, linear low density)
Polymer code	PE-LLD

Composition detail (polymers and natural materials)

Polymer

100

Physical properties

Density

0.918

–

0.940

g/cm³

Mechanical properties

Young’s modulus	0.262	–	0.517	GPa
Specific stiffness	0.282	–	0.557	MN.m/kg
Yield strength (elastic limit)	9.65	–	19.3	MPa
Tensile strength	13.1	–	27.6	MPa
Specific strength	10.4	–	20.8	kN.m/kg
Elongation	100	–	965	% strain
Compressive modulus	0.262	–	0.517	GPa
Compressive strength	11.6	–	23.2	MPa
Flexural modulus	0.275	–	0.722	GPa
Flexural strength (modulus of rupture)	18.3	–	38.6	MPa
Shear modulus	0.091	–	0.18	GPa
Bulk modulus	0.978	–	1.03	GPa
Poisson’s ratio	0.43	–	0.448
Shape factor	3.9
Hardness – Vickers	3	–	6	HV
Hardness – Rockwell M	29	–	31
Hardness – Rockwell R	40	–	50
Elastic stored energy (springs)	132	–	486	kJ/m³
Fatigue strength at 10⁷ cycles	5.24	–	11	MPa

Impact & fracture properties

Fracture toughness	1.26	–	3.79	MPa.m^0.5
Toughness (G)	5.15	–	32.7	kJ/m²
Impact strength, notched 23 °C	590	–	600	kJ/m²
Impact strength, notched -30 °C	590	–	600	kJ/m²
Impact strength, unnotched 23 °C	590	–	600	kJ/m²
Impact strength, unnotched -30 °C	590	–	600	kJ/m²

Thermal properties

Melting point	122	–	124	°C
Glass temperature	-125	–	-90	°C
Heat deflection temperature 0.45MPa	27	–	57	°C
Heat deflection temperature 1.8MPa	2	–	32	°C
Maximum service temperature	77	–	97	°C
Minimum service temperature	-79	–	-69	°C
Thermal conductivity	0.155	–	0.162	W/m.°C
Specific heat capacity	1840	–	1910	J/kg.°C
Thermal expansion coefficient	297	–	303	µstrain/°C
Thermal shock resistance	78.3	–	195	°C
Thermal distortion resistance	5.17e-4	–	5.4e-4	MW/m

Electrical properties

Electrical resistivity	3.3e24	–	3e25	µohm.cm
Electrical conductivity	5.75e-24	–	5.22e-23	%IACS
Dielectric constant (relative permittivity)	2.2	–	2.4
Dissipation factor (dielectric loss tangent)	4e-4	–	6e-4
Dielectric strength (dielectric breakdown)	19.7	–	23.6	MV/m
Comparative tracking index	600			V

Magnetic properties

Magnetic type

Non-magnetic

Optical, aesthetic and acoustic properties

Refractive index	1.5	–	1.52
Transparency	Translucent
Acoustic velocity	523	–	757	m/s
Mechanical loss coefficient (tan delta)	0.0774	–	0.153

Absorption & permeability

Water absorption @ 24 hrs	0.005	–	0.01	%
Water vapor transmission	0.266	–	0.379	g.mm/m².day
Permeability (O2)	131	–	219	cm³.mm/m².day.atm

Processing properties

Polymer injection molding	Excellent
Polymer extrusion	Excellent
Polymer thermoforming	Limited use
Linear mold shrinkage	2	–	2.2	%
Melt temperature	177	–	316	°C
Mold temperature	30	–	50	°C
Molding pressure range	34.4	–	103	MPa

Durability

Water (fresh)	Excellent
Water (salt)	Excellent
Weak acids	Excellent
Strong acids	Acceptable
Weak alkalis	Excellent
Strong alkalis	Excellent
Organic solvents	Limited use
Oxidation at 500C	Unacceptable
UV radiation (sunlight)	Poor
Flammability	Highly flammable