Polymethylmethacrylate - PMMA
General Description : Often just called "acrylic" - though this really describes a large family of chemically related polymers - PMMA is an amorphous, transparent and colourless thermoplastic that is hard and stiff but brittle and notch-sensitive. It has good abrasion and UV resistance and excellent optical clarity but poor low temperature, fatigue and solvent resistances. Though flammable, it has low smoke emission. General purpose grades can be extruded and injection moulded. Monomer casting (for a description, see Nylon 6) is also used to achieve much higher molecular weights - which are not melt processable because of their extremely high melt viscosity - with somewhat improved properties. The monomer cast items most commonly encountered are sheets and novelty displays in which e.g. insects or watch parts are embedded. Thin films are normally made from impact modified grades, which incorporate a small proportion of elastomer(s), in order to improve their flexibility. Applications include sinks, baths, displays, signs, glazing (especially aircraft), lenses and light covers. Cast sheet is also used for guards and the like.
Thickness: 0.38mm, Colour: Clear/Transparent
Thickness: 0.75mm, Colour: Clear/Transparent
Thickness: 0.25mm, Colour: Clear/Transparent