Metro
- PE is most popular thermoplastic commodity used in consumer products (especially products created by rotational molding), polyethylene is created through the polymerization of ethylene
- LDPE (Low Density Polyethylene) is defined by a density range of 0.910 – 0.940 g/cm3. It has a high degree of short and long chain branching, which means that the chains do not pack into the crystal structure as well. It has therefore less strong intermolecular forces as the instantaneous-dipole induced-dipole attraction is less. This results in a lower tensile strength and increased ductility. LDPE is created by free radical polymerization. The high degree of branches with long chains gives molten LDPE unique and desirable flow properties.
- HDPE(High Density Polyethylene) is defined by a density of greater or equal to 0.941 g/cm3. HDPE has a low degree of branching and thus stronger intermolecular forces and tensile strength. HDPE can be produced by chromium/silica catalysts, Ziegler-Natta catalysts or metallocene catalysts. The lack of branching is ensured by an appropriate choice of catalyst.
- MDPE(Medium Density Polyethylene) is defined by a density range of 0.926 – 0.940 g/cm3. MDPE can be produced by chromium/silica catalysts, Ziegler-Natta catalysts or metallocene catalysts.
- LLDPE (Linear-Low Density Polyethylene) is defined by a density range of 0.915 – 0.925 g/cm3. is a substantially linear polymer, with significant numbers of short branches, commonly made by copolymerization of ethylene with short-chain alpha-olefins (e.g. 1-butene, 1-hexene, and 1-octene).
- PP (Polypropylene), one of the most commonly used plastics, is a synthetic resin made by polymerizing propylene. Its types vary depending on its properties and processing methods.
- PVC is one of the most widely used thermoplastics and its properties such as robustness or durability can be changed as necessary according to the types of additives mixed during the processing process. Thanks to these characteristics, PVC is extensively used in a variety of areas from construction materials to household commodities.
- POE is a copolymer of ethylene and octane or ethylene and butane produced using its proprietary metallocene catalyst.
- EVA is a copolymer of ethylene and vinyl acetate monomer (VA). Its elasticity, heat sealing temperature, durability and permeability vary depending on the content of vinyl acetate monomers. It is used in a variety of areas from value-added products such as photovoltaic sheets to shoe soles, life vests, and more.
- Blowing agent is a chemical additive that is able to evolve gas through thermal decomposition and produce foam structures in a polymeric matrix such as plastic and rubber and is classified into organic chemical blowing agent and inorganic chemical blowing agent.