Plastic Polymer-based, liquid curable organic material formed after processing. More oil is produced from raw materials of plastics. Small molecule chemical means combined with the polymerizable monomers, and this occurs işlemsonuc large molecular polymers. Many of polymer additives to obtain plastic materials suitable for the purpose of easy processability of plastics, color, brightness, suitable for automatic production, the plastic has led to the possibility of using a wide variety of fields. Plastic can also be a lot cheaper. Resistance to climatic conditions are better than metals. Phone from the body and hands, utensils, floor covering, bottles, furniture, industrial tools and many materials are manufactured from plastic. Classification of Plastics: Plastics are divided into three main classes: 1. Cellulosic plastics, 2. Of course, plastics, 3. Synthetic resin plastics. Plastics in the three main classes are divided into different classes between them. Cellulosic plastics, cellulose acetate, cellulose asetobütirat ester include cellulose esters. Casein plastics, of course, plastic is made from milk which is also called the süttaş. Synthetic resin, plastics, thermoplastics and thermoset plastics as are the two groups. plastics to be made substances to be formed, each time it is heated time to soften (thermoplastic) and a time after heating hardened again, heated even softened (thermosets) into two classes separated. thermoplastics Acrylonitrile-(ABS ) plastics, acetal plastics, acrylic plastics, cellulose plastics, florplastikleri, polyethylenes, polypropylenes, polyvinyl chlorides engage. Thermoset plastics into the amino plastics, epoxy resins, phenolic resins, polyurethane enters.
Plastics Additives: Plastic base material is a polymer. Shaping and burning for dyeing plastics, oil, moisture, for the purpose of improving the strength of the various additives are added. To increase the strength of the plastic used in the plurality of glass fibers. To increase the vibration resistance, the plastic into the rubber, the solids particles. To minimize cost of products from plastic into sawdust, mica and asbestos dust is mixed. Plastic the heat and chemical resistance are also provided with chemical additives. Plastic hardness is adjusted with dioktilftalat and similar compounds. Chlorine and bromine, with plastic side feature saves. Plastics coloring agents process the dye color (pigments) and dyes are made. For example, titanium dioxide, used to give white color plastic.
Plastic forming methods: Plastic shapes, with heating and pressing molds with different methods is given. For this purpose, automatic looms were manufactured plastic materials. Plastic molding is carried out in three main method. These injection molding, transfer molding and spin-compression (extrusion) method. Apart from these methods, there are many other special forming procedures.
Injection Molding: the most commonly used method in the shaping of thermoplastic injection procedure.Thermoplastic granules 3 mm-sized cubes or cylinders from a reservoir enters the melting box. Wherein the hydraulic piston and the electric heater being melted with the plastic material is removed from the mold. All these operations are carried out automatically the injection molding machine.
Transfer Molding: Injection molding procedures to increase the speed of production containing a large amount of same-sex male and female mold shape is used. Such tissue is especially valid for thermosetting plastics. Onto the female mold pouring liquid plastic, more to solidify before it has time heated male mold is pressed.
Bore-compression molding: Injection molding hydraulic piston with a plastic mold push the process of this method mincers as in the endless spiral gears are exercised. Electrically heated to melt the plastic granules passes through. Toothpaste with liquid plastic worm is transferred to the mold as tightened. Soğutmaişle shaped plastic material in the mold is obtained by performing.
Blow molding: hollow bottle-shaped plastics, the plastic material into the mold by inflating with compressed air is obtained. Blowing molding method, large-sized containers, barrels, car fuel tank manufacturing is appropriate.
Plastic coating: the liquefied plastic into the heated metal is removed branch cheap, decorative products are obtained.
Linoleum production: Plastic passed between rollers if the spread sheet becomes. Tablecloths, shower curtains are manufactured with this method.
Problems with Plastic: Plastic materials into use again after being melted by 25 percent to join the new plastic materials can be made available to cast again available. Resistance will decrease only for this kind of plastic is used in a more simple tasks. In this way the cost of the plastic material may. Thermoset plastics are not able to use the re-melted. use of plastic materials for packaging of food, an issue that is quite like precision. Small molecules of plastic, preserved in the alcohol, acidic foods can be toxic. , plastic materials, porcelain, glass, metal material is quite high compared to the rate of radioactive substances. Personnel working in the field of plastic materials warehouse has been paying attention to these matters should work. Plastic materials causes environmental pollution can be considered as the most important elements.