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Acrylonitrile butadiene styrene (ABS) (chemical formula (C 8 H 8) x · (C 4 H 6) y · (C 3 H 3 N) z) is a common thermoplastic polymer. Its glass transition temperature is approximately 105 °C (221 °F). [4] ABS is amorphous and therefore has no true melting point. ABS is a terpolymer made by polymerizing styrene and acrylonitrile in the ...
Polycarbonate is commonly used in eye protection, as well as in other projectile-resistant viewing and lighting applications that would normally indicate the use of glass, but require much higher impact-resistance. Polycarbonate lenses also protect the eye from UV light.
Polypropylene is normally tough and flexible, especially when copolymerized with ethylene. This allows polypropylene to be used as an engineering plastic, competing with materials such as acrylonitrile butadiene styrene (ABS). Polypropylene is reasonably economical. [citation needed] Polypropylene has good resistance to fatigue. [8]: 3070
When I did the 360-spin test, both pieces of luggage spun around effortlessly while the smooth-gliding wheels rolled down my carpeted hallway and on my hardwood floors easily.
They were originally made using heavier materials such as leather or steel, but, beginning in the 1930s, were constructed with more lightweight materials like plastic and cardboard. Before the 1970s, the idea of rolling luggage was shunned by the travel industry, who viewed it as much less masculine than traditional luggage.
Compared to polycarbonate, ASA has higher resistance to environmental stress cracking, and exhibits lower yellowing in outdoor applications. Compared to polypropylene, ASA has lower moulding shrinkage (0.5% vs 1.5%), higher stiffness, impact resistance, heat distortion temperature, and weatherability. [9]
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