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Wednesday, June 8, 2011

Duroplastics

The most common examples of duroplastics are Bakelite and textolite. They are nothing but resins made of chemical phenol formaldehyde. The properties can be fine controlled appreciably in these materials by the optimal usage of filler materials. Phenolic fabric-filled laminates are current choice and is used for the construction of low cost, thin stamped gears or punched parts. For changing colour and altering pastel shades, we use urea aldehydes. High values of dielectric strength and resistance of melamine aldehydes makes it best candidate for the construction of moulded electrical parts. Aniline aldehyde is another alternative with exceptional mechanical, electrical and chemical properties. For the usage in housings, containers and ducts epoxy-glass can be preferred. Polyester-glass, acetal, silicone and synthetic rubbers are some other examples of duroplastics.

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