Sheet in PMMA E AR UV 100 3050x2050x3 mm transparent

PMMA, polymethyl methacrylate or everyday acrylic, is extruded here, that is pressed through a die in the AR version with extra UV protection. AR means that the surface is scratch resistant, that is it takes scratches better than untreated acrylic. The surface coating, a so called hardcoat, carries most of the distinguishing properties. UV means added UV protection, so the material does not yellow and turn brittle in the sun.

The Taber abrasion is under 3 percent haze after 100 cycles, the pencil hardness 5H, the tensile strength 67.5 MPa, the tensile modulus 3450 MPa, the impact strength 10 kJ/m², Vicat B50 106 °C and the light transmission 92 percent. Untreated acrylic in the same measurements gives 20 to 30 percent haze, pencil hardness 2H, tensile strength 72 MPa, tensile modulus 3300 MPa, impact strength 15 kJ/m² and Vicat 103 °C.

The hardcoat handles over 24 hours against acetone, toluene, hydrochloric acid 32 percent, sodium hydroxide 30 percent, sulfuric acid 30 percent and ethyl acetate. Underneath sits the same acrylic as in standard PMMA E, with a density of 1.19 g/cm³, a maximum service temperature of 70 °C continuously and 90 °C for short periods, plus water absorption of 0.2 percent after 24 hours and 2.1 percent at saturation. AR should not be confused with Resist: AR is scratch resistant, Resist is impact tough.

The sheet is sawn, milled, drilled and polished with tools made for plastic. Thermoforming is done at temperatures around 150 to 160 °C for extruded acrylic. Acrylic adhesive with methyl methacrylate is the standard choice for bonding. After milling and bonding the material should be annealed to reduce internal stresses and avoid stress cracking.

Transparent and colored acrylic is used for signs, illuminated signs, machine guards, inspection hatches, store fittings, displays, aquariums, safety glazing, exhibition builds, furniture fronts and roof domes. The material weighs half as much as glass at the same thickness and does not break into sharp shards.

This extruded AR sheet is 3050x2050x3 mm in transparent, a format that suits both large surfaces and parts that are cut to your dimensions. The hardcoat on this extruded AR sheet at 3050x2050x3 mm in transparent makes it excellent for exposed surfaces where scratches would otherwise show. The UV protection on this 3050x2050x3 mm extruded AR sheet means it takes longer spells of sunlight without yellowing or turning brittle.

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