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Almost all plastics can be formed into a thin film. Some of the primary ones are: Polyethylene – The most common plastic film is made of one of the varieties of polyethylene: low-density polyethylene, medium-density polyethylene, high-density polyethylene, or linear low-density polyethylene.
Drafting film is a sturdier and more dimensionally stable substitute for drafting paper sometimes used for technical drawings, especially architectural drawings, and for art layout drawings, replacing drafting linen for these purposes. Linen and paper, such as bond and vellum, for reason of the organic origins like cotton, may shrink due to ...
plater finish, obtained by placing cut sheets of paper between stacked zinc or copper plates and put under pressure and heat. A special finish such as a linen finish would be achieved by placing a piece of linen between the plate and the sheet of paper, or else an embossed steel roll might be used.
Below are some uses for plastics in the construction industry: Pipes for rain water, sewage, gas distribution, and organizing wires may be made of plastic. Cable insulation and insulating tape is usually made of plastic. Plastic may be used in flooring and roofing materials. Doors, window panels, and skylights may be made of plastic.
Papier-mâché, a composite of paper and glue, has been used for hundreds of years. [14] The first artificial fibre reinforced plastic was a combination of fiber glass and bakelite, performed in 1935 by Al Simison and Arthur D Little in Owens Corning Company [15]
Tar paper has largely fallen out of use supplanted by asphalt felt paper. Felt paper has been supplanted in some uses by synthetic underlayments, particularly in roofing by synthetic underlayments and siding by housewraps. There are a wide variety of damp proofing and waterproofing membranes used for roofing, basement waterproofing, and ...
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For products such as plastic sheets or films, cooling is achieved by pulling through a set of cooling rolls (also known as calender or chill rolls), usually 3 or 4 in number. In sheet extrusion, these rolls not only deliver the necessary cooling but also help determine sheet thickness and surface texture (in case of structured rolls; i.e ...
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