espadana  penguinsepid

History of Plastics Industry

History of Plastics Industry The first step in the plastics industry, was conducted by a person who tried to stop Hykat provide material instead of ivory. Hard material such as ivory, precious and so rare that many applications. He was able to cellulose nitrate (which they called nitrocellulose) ...

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Resume Production

Resume Production White Penguin enjoying the newest and most advanced production equipment and a staff of experienced and qualified plastic world and laboratory quality control, our products include all kinds of Nylex and nylon bags in different sizes, types of garbage bags,Paper Tablecloths & freezer bags  ...

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Sepid Penguin company Spadana

  Sepid Penguin company Spadana  White Penguin Spadana company in 1391 with registration number 48543 in the office and industrial property was registered in the province After obtaining permission from the Ministry of Industries and Commerce and the US Food and Drug its production activities in the field

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01Polyethylene is a thermoplastic polymer consisting of long hydrocarbon chains. Depending on the crystallinity and molecular weight, a melting point and glass transitionmay or may not be observable. The temperature at which these occur varies strongly with the type of polyethylene. For common commercial grades of medium- and high-density polyethylene the melting point is typically in the range 120 to 180 °C (248 to 356 °F). The melting point for average, commercial, low-density polyethylene is typically 105 to 115 °C (221 to 239 °F).

Chemical properties
Most LDPE, MDPE, and HDPE grades have excellent chemical resistance, meaning that it is not attacked by strong acids or strong bases. It is also resistant to gentle oxidants and reducing agents. Polyethylene burns slowly with a blue flame having a yellow tip and gives off an odour of paraffin. The material continues burning on removal of the flame source and produces a drip Crystalline samples do not dissolve at room temperature. Polyethylene (other than cross-linked polyethylene) usually can be dissolved at elevated temperatures in aromatic hydrocarbons such as toluene or xylene, or in chlorinated solvents such as trichloroethane or trichlorobenzene