TECHNICAL INFORMATION P8/0713 vitroflex NOISE BARRIER features Methacrylate cast sheets special for acoustic insulations. Vitroflex NOISE BARRIER sheets placed in a sound barrier to protect a residential area of road traffic noise. PROPERTIES This product is designed for applications where a transparent acoustic insulation is required. High durability, the physical and chemical properties remain unchanged over time. Lighter than most materials with similar optical qualities. High breaking strength. It allows being slightly cold-bended. Easy cleaning. Page 1 of 7
APPLICATIONS Construction elements similar to walls (noise barriers) to attenuate the noise: Road traffic Railway traffic Other noises not linked to transport but that cause discomfort to your environment Installation of vitroflex NOISE BARRIER sheet OPERATION Can be stuck, folded, thermoformed, drilled, polished, milled, etc. just as the standard quality Vitroflex. The assembly is very important for optimum results. The piece must be fixed well with elastic joints, and dimensional changes due to temperature must be respected (see linear expansion coefficient). The protective film can be kept during the entire production line, including the thermoformed. 1 Maximum 80 C working temperature. 1 It is advisable to run previous tests because heating temperatures and timing should be adjusted in order to get optimum results. Page 2 of 7
MAINTENANCE It is recommended to clean with a soft brush supplied with soft water. Never dry clean or with aggressive products or not neutral soaps. The use of glass washers with alcohol or other similar products may negatively affect the properties and reduce the service life. If desired a strong cleaning, for example for the removal of graffiti, is recommended to consult the chemical resistance of Vitroflex table, do a test on a piece, and preferably use only products recommended by the manufacturer. In case the surface has small scratches due to the daily use, they can be removed using a specific polish for car bodies that is used manually. If deep scratches appear or if it is necessary to polish large surfaces, it is advisable to use an orbital eccentric polishing machine. RANGE Size: They are manufactured according to the European standard of 3050 x 2050 mm. Custom-cut sizes can be supplied. Types and colours: vitroflex XT NOISE BARRIER is the most common by the possibility of having great lengths at a competitive price. Can be supplied in colour from 3000 Kg. vitroflex CAST NOISE BARRIER is used when required coloured in quantities of less than 3000 Kg or special properties such as resistance superior to certain agents. vitroflex REINFORCED is specially designed for application in bridges and flyovers where is required by Directive 89/106/EEC compliance. Thickness: Standard are 15-20 mm. Various factors should be considered to calculate the necessary thickness. Among them the force of the wind in the area where will be placed, the distance between supports, the type of fixation of the plate to the bracket, the fixing points and the required acoustic attenuation. It can be produced with other thicknesses on request. Page 3 of 7
QUALITY Products certified according to standards: 14388:2007 Road traffic noise devices. IN 1793-2:1997 and EN 1793-3: 1997 Road traffic noise devices. IN 1794-1:2011 and in 1794-2: 2011 Road traffic noise reducing devices: Non acoustic performance. 14389-1:2008 and EN 14389-2:2004 Road traffic noise reducing devices. Procedures for assessing long term performance. Colour repeatability guaranteed, with certificate colour according to CIE L* a*b*. Compliance with the standard ISO 7823 applicable to cast and extruded acrylic sheets. OTHER AVAILABLE INFORMATION Table of resistance to various chemical products. For handling "Safety Data Sheet" safety data sheet. Colour sheet. Basic manual manipulation of methacrylate. Page 4 of 7
Vitroflex NOISE BARRIER TECHNICAL FEATURES 7823-1 2 Physical properties Relative density - Volumetric mass (A Method) 1,19 g/cm 3 ISO 1183 Water absorption (Method 1) 0,3 % ISO 62 Mechanical properties Tensile strength (Type 1 Test, B speed) 72 MPa ISO 527 Traction elasticity module (Type 1 Test, B speed) 3000 MPa ISO 527 Elongation at break (Type 1 Test, B speed) 5 % ISO 527 Impact strength. Charpy method 17 KJ/m 2 ISO 179/2D Rockwell hardness (M Scale) 100 ISO 2039/2 Bending strength 100 MPa ISO 178 Electrical properties Specific resistance >10 15 Ohm DIN 53458 Volume resistance >10 15 Ohm.cm DIN 53458 Dielectric constant a) 50 Hz b) 0,1 Hz Thermal properties 3,6 2,8 DIN 53483 Coefficient of linear expansion 70,6.10-6 K -1 EN 2155-12 VICAT softening temperature 105-120 ºC ISO 306 Bending temperature under load (A Method, 1,8 MPa) 105 ºC ISO 75 Dimension variation at elevated temperatures (shrinkage) 2,3 % Annex Optical properties Light transmittance a) Total light transmission at 380-780 nm b) Light transmission at 420 nm c) Light transmission at 420 nm after 1000 hours in the xenon lamp 93 92,6 91,04 % ISO 2857 Ageing under artificial light a) Light transmission at 420 nm after 672 hours of exposure to a high pressure mercury lamp 82 % ISO 2857 HAZE turbidity value 0,4 % EN 2155-9 Refractive index n 0 (A Method) 1,492 - ISO/R 489 2 The values of this table refer to the sample of Vitroflex (MCI100NN0030. Typical values are not intended for the design. Page 5 of 7
Vitroflex NOISE BARRIER ACOUSTIC PROPERTIES Acoustic attenuation depending on thickness 3 mm 24 db ISO R 140 4 mm 26 db ISO R 140 5 mm 28 db ISO R 140 6 mm 29 db ISO R 140 8 mm 31 db ISO R 140 10 mm 32 db ISO R 140 12 mm 33 db ISO R 140 15 mm 34 db ISO R 140 20 mm 36 db ISO R 140 Acoustic attenuation depending on thickness 38 36 34 32 db 30 28 26 24 22 20 0 2 4 6 8 10 12 14 16 18 20 22 24 mm Page 6 of 7
Important: The information and statements included are believed to be reliable; however, they should not be interpreted as a guarantee or representation that Polimer Tecnic assumes the legal responsibility. Users must perform all verifications and tests as appropriate to determine the particular suitability of any information or product mentioned in this document. Polimer Tecnic cannot guarantee the competence of the material for any particular purpose. Nothing in this document may be interpreted as a permission, incentive or recommendation to operate any patented invention without a license. Page 7 of 7