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Vinyl siding is plastic exterior siding for houses and small apartment buildings, used for decoration and weatherproofing, imitating wood clapboard, batten board and batten or shakes, and used instead of other materials such as aluminum or fiber cement siding.
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When UHMWPE is annealed, the material is heated to between 135 and 138 °C (275 and 280 °F) in an oven or a liquid bath of silicone oil or glycerine. The material is then cooled down to 65 °C (149 °F) at a rate of 5 °C/h (9 °F/h) or less. Finally, the material is wrapped in an insulating blanket for 24 hours to bring to room temperature.
However, newer vinyl options have improved and resist damage and wear better. Vinyl siding is sensitive to direct heat from grills, barbecues or other sources. Unlike wood, vinyl siding does not provide additional insulation for the building, unless an insulation material (e.g., foam) has been added to the product.
It is sold in both fiber and sheet forms and is used as a fabric where resistance from heat and flame is required. Nomex sheet is actually a calendered paper and made in a similar fashion. Nomex Type 410 paper was the first Nomex paper developed and one of the higher volume grades made, mostly for electrical insulation purposes.
A calender is a series of hard pressure rollers used to finish or smooth a sheet of material such as paper, textiles, rubber, or plastics. Calender rolls are also used to form some types of plastic films and to apply coatings. [1] Some calender rolls are heated or cooled as needed. [2] Calenders are sometimes misspelled calendars.