Ads
related to: heavy duty clear polythene rolls sheets
Search results
Results From The WOW.Com Content Network
HDPE is known for its high strength-to-density ratio. [4] The density of HDPE ranges from 930 to 970 kg/m 3. [5] Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength (38 MPa versus 21 MPa) than LDPE. [6]
The ration is packed inside a heavy-duty (.25 mm thick) matte green or olive drab polyethylene bag measuring 300 mm wide by 400 mm long. It is printed with the logo of the Brazilian Army, the name of the ration, and menu information. Inside are 5 thinner (.10 mm) semi-transparent plastic bags, one for each meal and one for the accessories.
Black plastic bags were introduced in 1950 as star sealed bags. The first bags in the United States were green and black, rather than the now-common white and clear. Flat-sealed bags first appeared in 1959. In the 1960s, the white bin bags were introduced. Two-ply (Heavy Duty) bags were introduced in 1974, with 3 ply bags following in 1980.
Film strip (photographic film) 6 mil polyethylene plastic sheet as vapor barrier in construction Confectionery packaging made of PLA-blend bio-flex bioplastic Shrink-wrapped OH-58 Kiowa helicopters to be shipped. Plastic film is a thin continuous polymeric material. Thicker plastic material is often called a "sheet".
An improvised tent using polytarp as a fly Abandoned homeless shelter using plastic tarp. A tarpaulin (/ t ɑːr ˈ p ɔː l ɪ n / tar-PAW-lin, [1] also US: / ˈ t ɑːr p ə l ɪ n / [2]) or tarp is a large sheet of strong, flexible, water-resistant or waterproof material, often cloth such as canvas or polyester coated with polyurethane, or made of plastics such as polyethylene.
Polyethylene was first synthesized by the German chemist Hans von Pechmann, who prepared it by accident in 1898 while investigating diazomethane. [12] [a] [13] [b] When his colleagues Eugen Bamberger and Friedrich Tschirner characterized the white, waxy substance that he had created, they recognized that it contained long −CH 2 − chains and termed it polymethylene.
Ads
related to: heavy duty clear polythene rolls sheets