Engineering Plastics Engineering Plastics: Engineering plastics are those plastic resins that, with or without fillers or reinforcements, have mechanical, chemical and thermal properties suitable for use in construction, machine components and chemical processing equipment. These include ABS, acetal, acrylic, fluorocarbon, nylon, phenoxy, polybutylene, polyaryl ether, polycarbonate, polyether, polyether sulfone, polyphenylene oxide, polysulfone, polyimide, polyphenylene sulfide, thermoplastic urethane elastomers, and many other reinforced plastics. As you can see, this includes a broad range of plastics. TiO2 is included in the engineering resin formulation to achieve desired properties such as high whiteness, hiding power, chemical stability, and weatherability. It is important to select the correct TiO2 grade to maximize dispersion, optics, and weatherability. It would be incorrect to assume that one grade of TiO2 is best for each type of engineering plastic. The optimal TiO2 grade is dependent on many factors, such as thermal stability, inertness to the particular chemistry of the engineering resin involved, and desired tone. For applications where maximum dispersion is desired, a general purpose or high performance TiO2 is recommended. For maximum weatherability, a durable TiO2 will ensure low chalking and maximum color hold. To maximize the UV absorption/stabilizing effects of TiO2 pigment, sometimes loading levels of up to 10% are desirable. Even at these levels physical properties are mainly unaffected. |
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