Plastic, carbon (C), hydrogen (H), oxygen (O), nitrogen (N) and formed with other organic or inorganic elements, called monomers, a simple molecular structure, severing the bond groups, the polymer was transformed into a structure called the long and the chain derived from the name given to the materials.
For example, an ethylene monomer. These monomers formed polyethylene polymer is a polymer. Is one of the most widely used plastics. As can be seen from the definition are not ready for plastic in nature, by human intervention is combined with elements of nature. To achieve a certain temperature and under pressure, with the introduction of catalytic reaction of monomers is used. At its launch, plastic powder, resin or may be granular. In general, plastics are used in oil refineries is obtained from materials left over from processing crude oil. According to research, only 4% of the earth a part of the oil used for plastic production.
Buckets Polypropylene is widely used in the packaging industry. PP copolymer with low permeability of the aroma is a type of plastic. With high rates of resistance to the sun’s rays in this material are widely used in food packaging industry. With different mobility in these materials, paint cans, buckets of yogurt, levhalık materials are produced.
Polyproylene Copolymer material put into the buckets are manufactured in any color desired with colored Masterbech. Heat-resistant plastic material, especially because of the yogurt industry risks associated with the front shock provides excellent results.
The most common commercial chemical and physical properties of polypropylene, the crystal structure of the low-density polyethylene (LDPE) and high-density polyethylene (HDPE) has a level of. Young’s modulus (elasticised module) in the middle level. However, than LDPE and less stiff than HDPE is much less brittle. This permits the use of polypropylene instead of engineering plastics such as ABS.
Polypropylene is a very good resistance against fatigue. Low-cost, has a good impact resistance. Has a low coefficient of friction, provides very good electrical insulation. Chemical resistance is good. All are suitable thermo-plastic processes. Polypropylene, the melting temperature around 160 ° C.
However, these have drawbacks. UV light resistance is less, indicates a high thermal expansion. Paint and coating is difficult. Less resistance to outdoor weather conditions, oxidation is open. It is flammable and interacts with the solvents containing chlorine.
What material? Which Sector?
The following priority will be given some information about what materials are used where.
Polivinülklorür (PVC): high strength, resistant to chemical attack and abrasion. Although flame-resistant fire emits toxic gas. Floor coverings, pipe hose, suitable for the production of artificial leather. In recent years, largely been used as door and window material.
Polypropylene (PP): Strength and sudan mild softening temperature is very high. Chemically inert and water absorption is very low. For this reason, largely bottle, suitable for the production of kitchen and laboratory equipment. Also, packaging, packing, and sack production.
ABS (Akronitril-Butadiene-Styrene): Three is a copolymer of high strength and toughness. Foreign and resistant to chemical attack. Pipe auto parts. electronic device used in the production of cabinets and refrigerator parts.
Polystyrene (PS): Although Bee is transparent. odorless, but has low resistance to environmental and chemical effects. Brittle and cheap, but is easy to process. Radio booths, toys, kitchen utensils and boards used in production of interior lighting.
Nylon: nylon polyamide which is a group strength, stiffness and toughness and wear-resistant high. Crystallization rate increases, the mechanical properties and softening temperatures yükselir.Naylonların easy to manufacture, although a bit expensive. Gear used in the production of bedding and similar parts.
Polymethyl methacrylate (PMMA): groups Acrylics (PMMA) is a transparent hard. rigid and resistant to outside influences. With the trade name Plexiglas marine vehicles, aircraft and otolarda windows, lamps and billboards are used in manufacturing.
Polycarbonate (PC): a very high strength and toughness and the size is determined. auto and aircraft industry, gear, cam, the team used in the production of parts such as handle, also suitable for the production of safety heads.
Polytetrafluoroethylene (PTFE): a symmetric and homogeneous structure largely kristalleştirilir polytetrafluoroethylene. Therefore, the polymer is considered the highest specific gravity (2.3 g / cm ³). Strength and corrosion resistance, high, very low coefficient of friction. -200 ˚ C to +260 ˚ C is suitable for use. It is very resistant to chemical attack. Friction is low and slippery bed, suitable for the production of bushings and seals. In addition, pump parts, and insulation tapes used in the production pipeline. High temperature resistant coating is suitable for their belongings and not stuck kitchen.