ACRYLITE® Optical Mar Resistant Acrylic Sheet Technical Information

Product Description

ACRYLITE® Optical (MR) sheet is a continuously manufactured acrylic sheet that has excellent abrasion and chemical resistant properties with outstanding optical quality. It is available with coating on one side or two sides. While two-side coated sheet provides maximum protection, one-side coated sheet offers economical advantages for applications where only one side of the sheet is exposed. In addition, the un-coated side is ideal for silk screening.

Properties

ACRYLITE® Optical (MR) sheet provides the following outstanding properties:

  • Optical clarity
  • Abrasion resistance
  • Chemical resistance
  • Ease of fabrication
  • Light weight – half the weight of glass
  • Strength – many times the impact strength of glass

ACRYLITE® Optical (MR) sheet resists marring and scratching from everyday public contact, daily cleanings, and airborne dirt and dust that are found in many applications. This property significantly extends the service life of the product. Although the coating provides an extremely hard surface to resist these abuses, it is not resistant to intentional gouging with sharp tipped objects, such as knives or screwdrivers.

Because this sheet offers protection from chemical attack, many household glass cleaners can be used on the coated surfaces. Recommended cleaning agents and chemical resistance information can be found below.

Applications

It is ideal for a wide variety of applications including:

One-Sided Coating

  • Glazing
  • P-O-P Displays
  • Store Fixtures
  • Menu Boards
  • Electronic Displays
  • Museum Displays
  • Signs & Directories
  • Furniture & Interiors
  • Framing

Two-Sided Coating

  • Sports Arena Glazing
  • Architectural Glazing
  • Security Glazing
  • Automotive Interiors
  • Instrument Cluster Panels

Product Specifications

ColorStandard SizeThicknessTransmission D65

Clear

0A000 MR1

48x96

60x96

72x96

.060" (1.5mm)*

.118" (3mm)

.236" (6mm)

.472" (12mm)

.708" (18mm)

92%

Clear

0A000 MR2

48x96

60x96

72x96

.060" (1.5mm)*

.118" (3mm)

.472" (12mm)

92%

*only available in 48x96

Abrasion Resistance

Assessing how well a product will perform under the conditions of an application must take into account the type of abuse or abrasion the product will encounter. Abrasion can be divided into three types. Scratching is the most common type of abrasion and is often caused by frequent cleaning and handling. Resistance to wear is measured by exposing a sample to continuous contact with an abrasive wheel in the Taber abrasion test. Resistance to particle impacts, such as sand, is measured using the falling sand test. This test simulates the type of abrasion typically experienced by a motor vehicle windshield. Resistance to scratching is evaluated by using a rotary brass wool test in which a coarse brass scouring pad is rubbed on the coated sheet surface by automated test equipment.

The following graphs show typical test data demonstrating the outstanding properties that ACRYLITE® Optical (MR) sheet offers versus conventional un-coated acrylic sheet.

Weathering

This sheet maintains its original appearance and color despite heat, cold, sunlight, and humidity. It withstands the adverse effects of outdoor weathering and has been found to experience no significant loss of light transmittance or any appreciable increase in yellowing after an accelerated weathering period of 3000 hours, Xenon Arc. This should ensure many years of trouble free performance.

light yellowness

PropertyASTM MethodTypical Substrate Value (3.0 mm Thickness)
Mechanical Tensile Strength D 638 10,000 psi (69 M Pa)
Elongation, Rupture - 4.5%
Modulus of Elasticity - 4000-,000 (2800 M Pa)
Flexural Strength D 790 17,000 psi (117 M Pa)
Modulus of Elasticity - 480,000 psi (3300 M Pa)
Izod Milled Notched D 256 0.4 ft.lbs/in. (21.6 J/m) of notch
Optical Light Transmission D 1003 92%
Thermal Deflection Temperature Under Load (264 psi) D 648 195°F (91°C)
Vicat Softening Point D 1525 220°F (105°C)
Coefficient of Linear Thermal Expansion D 696 0.000040 in/in•°F (.000068 m/m•°C)
Coefficient of Thermal Conductivity C 177 1.3 BTU/hr.ft.2•°F/in (.19W/m•°K)
Flammability Burn Rate D 635 1.0 in/min (25 mm/min)
Self-Ignition Temperature D 1929 830°F (443°C)
Smoke Density Rating D 2843 1%
Abrasion Resistance of the CoatingChange in Haze
Rotary Brass Wool (25 cycles) Proprietary method < 1%
Taber Abrasion (100 cycles) D 1044 < 2%
Falling Sand (3,000 grams) DIN 52 348 < 10%

Chemical Resistance

The following table shows typical test data demonstrating the resistance of ACRYLITE® Optical (MR) sheet to various chemicals versus un-coated sheet. Note: some chemicals will attack edges and un-coated surfaces of sheet.

ChemicalACRYLITE® Optical (MR)Standard Acrylic Sheet
Acetone > 24 hrs < 15 min
Ethylene Dichloride > 24 hrs < 15 min
Gasoline > 24 hrs > 24 hrs
Hydrochloric Acid > 24 hrs > 24 hrs
Methyl Alcohol > 24 hrs > 24 hrs
Methyllene Chloride > 24 hrs < 15 min
Methyl Ethyl Ketone > 24 hrs > 15 min
Nitric Acid > 24 hrs < 15 min
Sodium Hydroxide > 24 hrs < 24 hrs
Sulfuric Acid > 24 hrs < 15 min
Toluene > 24 hrs < 15 min
Isopropanol > 24 hrs > 24 hrs
Kersosene > 24 hrs > 24 hrs

Testing the resistance of these chemicals was conducted per ASTM D 1308. Time intervals for visually inspecting the sheet surface: 15 minutes, 1 hour, and 24 hours. The table shows the time it took the chemical to visually attack the surface.

Fabrication

It can be stored, saw cut, drilled, routed, milled, and laser cut using the same tooling and techniques that are used when machining ACRYLITE® sheet. Please refer to the Technical Briefs for details on how to perform certain machining steps or to find manufacturers of equipment and tooling. When performing any type of machining operation to this sheet, it is recommended to leave the protective masking on the sheet.

There are certain operations that are not recommended for ACRYLITE® Optical (MR) sheet. They may damage, or in some manner, adversely affect the performance of the abrasion resistant coating. The following operations have fabrication restrictions:

Edge Preparation: Scraping, wet sanding, and buffing are acceptable methods of preparing a finished edge. Flame polishing is not recommended. Overspray from the flame will cause the surface coating to crack or craze. This may lead to delamination of the coating and a loss of abrasion resistance in the affected area.

Cementing: It is available with the abrasion resistant coating on one or two sides. When cementing to a non-coated surface, use the same solvent or polymerizable cements commonly used on our sheet. Solvent cementing to an abrasion resistant coated side requires surface preparation. To solvent cement to the coated side, the coating must first be removed by wet sanding or routing. When removing the coating, ensure that the bonding surface is flat, clean, and free of stress. Annealing the piece will ensure a stress free surface. Refer to Technical Brief #8 Cementing for details, procedures, and a list of acceptable cements.

Thermoforming: Line bending or thermoforming ACRYLITE® Optical (MR) sheet is not recommended. Due to differences in the thermal properties of the coating and substrate, these heating processes can lead to delamination of the coating.

Painting, Silkscreening: The abrasion resistant coating provides chemical resistance which will prevent some inks or paints from adhering properly. NOTE: The un-coated side of the one-side coated product is ideal for these applications. Contact our Technical Center for more information.

Cleaning

A liquid detergent and water solution is the recommended cleaner for this sheet. While the use of abrasive cleaners is not recommended, the following brand name cleaners have been tested and found to work well on coated surfaces.CAUTION: Some of these cleaners may attack the un-coated side or edges of the sheet.

  • Fantastik® household cleaner
  • Mr. Clean® household cleaner
  • Formula 409® household cleaner
  • Top Job® household cleaner
  • Glass Plus® cleaner
  • Windex® window cleaner

Graffiti Removal: Several solvents and cleaning agents are effective in graffiti removal. Although ACRYLITE® Optical (MR) abrasion resistant sheet has excellent chemical resistance, cleaners, and solvents should be tested before using to ensure that they do not harm the coating. Avoid exposure of edges and uncoated sheet surface to cleaning agents. For additional information, visit our Technology Center.

Recommended Cleaners: Due to the varying nature of graffiti, some cleaning agents will be more effective at removal than others. The cleaning agent below has been found to work well on a variety of graffiti. Be sure to read the supplier’s MSDS and follow their directions carefully for handling, use and disposal of the cleaner. Commercial Remover: GRAFFITI TERMINATOR REMOVER, West Coast Chemical Corp, 800-223-0526.

Procedure: Apply the cleaner generously, avoiding contact with uncoated surfaces. Allow the cleaner to penetrate the graffiti for 2 – 5 minutes. Remove the graffiti by rubbing with a soft cloth. Repeat these steps as needed to remove the graffiti. A plastic putty knife or smoother blade (found in the wallpaper section of a home improvement store) may be used to scrape at stubborn or hardened paints, but care must be taken not to gouge the coating. Never use a razor blade, metal knife, or scraper. Wash the area with mild soap and water to remove residue.

Code Approval

ACRYLITE® Optical (MR) sheet meets the requirements of the following codes and regulations:

  • ANSI Z 97.1 for Safety Glazing Materials Used in Buildings
  • ANSI Z26.1, AS-4, 5, 6, & 7 for Safety Glazing Materials for Glazing Motor Vehicles
  • Uniform Building Codes for use as a Light

Transmitting Plastic:

  • ICC Evaluations Service Report ESR-1260

Consumer Products Safety Commission, Safety Standard for Architectural Glazing Materials, 16CFR 1201, Categories I & II UL Recognized Component, File # E54671: UL Flammability Ratings: HB in all thicknesses.