polyethylene sources
Polyethylene (PE) is the material used over half of all films today, and low density polyethylene (LDPE) is the source of most poly bags. All of out stock bags are manufactured with LDPE for its great tensile strength, clarity, flexibility, and water barrier properties. It is also resistant to most caustic compounds. For each layflat bag, there are three dimensions. The first measurement is the width across the opening of the bag. The length runs from the bag opening to the base of the bag. Gauge, the third figure in a bag's dimensions, is a measure of its thickness expressed in mils.
Interference fringe bands are often observed in infrared transmission spectra of polymer films. These bands interfere with and obscure important small features in spectra associated with various types of additives. FTIR-PAS spectra are free of interference artifacts due to the differences in signal generation between an absorption versus transmission basedmeasurement. Conventional transmission and FTIR-PAS spectra of a 32 micrometer thick polyethylene film. The PAS spectrum has been converted to transmittance for the purpose of comparison. Note the absence of interference fringes in the PAS spectrum.
Polyethylene tarps are lightweight compared to canvas, and are often put to use in landscaping since they will not crush grass or plants underneath them. They are often used to cover sports fields in between games to keep the field safe from rain and wind. Poly tarps are also good for covering swimming pools during the cold months.