polypropylene (pŏl´ēprō´pəlēn), plastic noted for its light weight, being less dense than water; it is a polymer of propylene. It resists moisture, oils, and solvents. Since its melting point is 121°C (250°F), it is used in the manufacture of objects that are sterilized in the course of their use. Polypropylene is also used to make textiles, ropes that float, packaging material, and luggage.
"polypropylene." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (June 18, 2018). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/polypropylene
"polypropylene." The Columbia Encyclopedia, 6th ed.. . Retrieved June 18, 2018 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/polypropylene
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pol·y·pro·pyl·ene / ˌpäliˈprōpəˌlēn/ • n. a synthetic resin that is a polymer of propylene, used esp. for ropes, fabrics, and molded objects.
"polypropylene." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (June 18, 2018). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/polypropylene
"polypropylene." The Oxford Pocket Dictionary of Current English. . Retrieved June 18, 2018 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/polypropylene