Linear Low Density Polyethylene:
Linear low-density polyethylene is shortly known as LLDPE. LLDPE is a substantially linear polymer (polyethylene), with significant numbers of short branches, commonly made by copolymerization of ethylene with longer-chain of olefins. Linear low-density polyethylene differs structurally from predictable low-density polyethylene (LDPE) because of the absence of long chain branching.
Processing & Properties:
LLDPE has a unique melt flow properties. LLDPE is less shear sensitive because of its narrower molecular weight distribution and shorter chain branching. During a shearing process, such as extrusion, LLDPE remains more viscous than LDPE. The lower shear sensitivity of LLDPE allows for a faster stress relaxation of the polymer chains during extrusion, and, therefore, the physical properties are susceptible to changes in blow-up ratios. In melt extension, LLDPE has lower viscosity at all strain rates. As the deformation rate of the polyethylene increases.
Physical Properties:
| Properties | Nominal Values |
| Density | 0.88 – 0.915 gm/cc |
| Tensile Strength | 30 MPa |
| Flexural Modulus | 0.35 GPa |
| Izod Impact (Notched) | 1.06 KJ/M |
| Elongation at Break | 400% |
| Heat Distortion Temp. (Load@ 1.80 MPa) | 37 Deg C |
| Flammability UL94 | HB |
| Melting Temperature | 130-160 Deg C |
| Mould Shrinkage | Max. 3% |
| Mould Temperature | 20-60 Deg C |
| Operating Temperature | Max. 50 Deg C |
| Water Absorption | 0.01 % |
| Oxygen Index | Max. 17% |
Uses:
it is used for plastic bags and sheets, plastic wrap, stretch wrap, pouches, toys, covers, lids, pipes, buckets and containers, covering of cables, geomembranes & flexible tubes.
I want to know how much low temperature LLDPE FB2230 can with stand , if we want that material need to withstand at -50 deg c
Than what we need to
Please suggest