HDPE Inflatable Polyethylene

HDPE is a high density polyethylene material obtained from petroleum. The name comes from the English word "High Density Polyetylene". This name is generally used in industry and manufacturing sector. Approximately 1.75 kg. from oil, 1 kg. HDPE raw material is obtained.

HDPE is now available in several ways. In the radical polymerization method, high pressure is applied. In the coordination polymerization, low pressure and catalytic synthesis at 50-75 ° C are performed. As the catalyst, heptane is dissolved, titanium tetrachloride and aluminum alkyl are used. The polymerization temperature is cooled and cooled. The recovered polymer form is powder or granule. It is filtered by liquid media and then dried. The other way in HDPE synthesis, "metal oxide catalyzed polymerization" is also dissolved in ethylene gas paraffin, at 60-200 ° C, at 35 atm. under pressure, the process is completed in a certain time. After cooling and solvent evaporation, the product is obtained. The so-called "linear (polyethylene)" HDPE is 90% crystalline, the main chain with at least 200 carbon atoms, the relative density of HDPE defined as Type III and Type IV in ASTM standards is given as 0.940 and higher. (HDPE, PETKIM capacity) 96,000 tons / year).

Although HDPE is similar in appearance to LDPE, its molecular mass is more than 150000-400000. Good resistance to water, chemicals. Light and outdoor conditions are not as durable as LDPE. This resistance can be increased with special fillings. Mechanical properties are very good, especially the impact and tensile strength is high. With some fillers, the properties are further improved. Normally the tensile strength is around 225-350 kgf / cm2. The temperature resistance is above 100 ° C. It is suitable for many forming methods such as injection, extrusion, powder coating, film drawing, rotary molding. Keeping the injection mold temperature at 50-70 ° C increases the quality of the product from the device. HDPE is also suitable for electrical applications.

HDPE, which has a wide usage area, is used in the production of pressure pipes, gas distribution pipes, bottles, drums, barrels, white goods and machinery parts, insulator, toys, electrical and electronic goods. As it is water resistant, HDPE is also used in boat and warehouse construction.