San Diego Plastics
2220 McKinley Avenue
National City  CA  91950
800/925-4855   619/477-4855   FAX 619/477-4874
AC-350™Acrylic (Bending Grade)
Static Dissipative Plastic
AC-350™ Acrylic is a plastic sheet product designed to control static electricity for a wide range of end uses. It is a premium quality acrylic sheet which has been surfaced with SciCron Technologies proprietary, clear, C-350™ static dissipative surfacing. This unique technology prevents charge generation on the sheet surfaces, thereby controlling particulate attraction and preventing electrostatic discharge (ESD) events. This performance is permanent and totally independent of humidity. AC-350 Acrylic offers exceptional design versatility since it fabricates simply, is light in weight and is available in large sheet sizes. It also exhibits excellent optical properties and chemical resistance, and superior bending properties.

AC-350 Acrylic resists tribocharging under all circumstances and cannot generate a charge when properly grounded. This makes it ideal for use in manufacturing and assembly operations for charge sensitive electronic components where it can help prevent both immediate and latent ESD caused defects. Since it resists charge build-up it does not attract contaminants, so it can also help prevent contamination-related rejects in ultra-clean manufacturing operations. Consequently, it is suitable for use in the semi-conductor, electronic, and micro-manufacturing industries. Typical applications include contoured panels and fabricated items which require heat forming or bending, such as; covers, windows, doors, and access panels for electronic equipment, machines and instruments; fabricated desiccators, cabinets, and boxes with heat bent parts; and formed process equipment enclosures. The product also has many general industrial uses, including protection for static charge sensitive manufacturing devices and control of spark discharge in explosive environments.

AC-350 Acrylic is easily fabricated into a variety of flat and bent configurations using the same equipment and fabrication techniques generally employed with unsurfaced acrylic sheet products. This product is designed to accommodate heat bending, however, care must be taken to avoid applying too much heat to prevent damage to the C-350 surface. When solvent welding, it is not necessary to remove the C-350 surface to achieve a good bond if the welding adhesive contains some dissolved plastic. For more information on fabrication refer to SciCron Technologies Technical Information Bulletin No. SP-02.

Features and Benefits
  • Cannot be tribocharged when properly grounded - Prevents buildup of static charge and accumulation of harmful contamination.
  • Electrostatic decay in less than 0.05 second per Federal Test Standard 101C, Method 4046.1 - Results in rapid static dissipation without arcing.
  • Surface resistivity of 106 - 108 ohms per square - Provides for ESD control without the need for ionization.
  • Permanence in static dissipation performance - Avoids cost of application of temporary topical anti-stats.
  • Humidity independent static charge control - Avoids inconvenience of maintaining high levels of humidity and damage caused by such humidity.
  • Advanced technology, uniform surface treatment - Avoids conductive discontinuities (charged "hot spots") often found with non-uniform temporary topical anti-stats.
  • Excellent optical properties - C-350 surface provides excellent clarity for optimum use of available light.
  • Superior chemical resistance - Reduces risk of solvent or chemical surface damage.
  • Superior fabrication and bending characteristics - Provides maximum versatility and workability during part fabrication.

    AC-350 Acrylic, in cell cast type, is available in clear and a variety of standard transparent colors including tints which filter wave-lengths that can interfere with processing operations. White translucent and colored opaque grades are also available. Continuously cast and extruded types are available in some sizes and thicknesses upon request.

    Note: Cell cast is a premium form of acrylic plastic but it has a wider thickness variation than other acrylic types. Therefore, continuously cast or extruded material should be specified if a narrow thickness tolerance range is required.

    Standard Dimensions (Nominal)

    Thickness: 3mm (1/8"), 4.5mm (3/16"), 6mm (1/4"), 9mm (3/8"), 12mm (1/2") - Note: 9mm and 12mm - cell cast only.
    Standard Sheet Size: 48" x 96"

    Other sizes and thicknesses, including oversize sheets, available upon request.

    Made in USA

  • AC-350™ Acrylic (Bending Grade)
    Typical Physical Properties (Typical but not guaranteed values for 0.25 inch material)
    property test method units AC-350 Acrylic
    Specific Gravity ASTM D-792 -- 1.19
    Pencil Hardness ASTM D-3363 Hardness Scale 3H
    Tensile Strength--Ultimate ASTM D-638 psi 10,000
    Tensile Strength--Elongation ASTM D-638 % 4.2
    Tensile Modulus ASTM D-638 psi 400,000
    Flexural Strength ASTM D-790 psi 16,500
    Flexural Modulus ASTM D-790 psi 475,000
    Compressive Strength ASTM D-695 psi 18,000
    Izod Impact Strength (milled notch) ASTM D-256 ft-lb/inch of notch 0.4
    Deflection Temperature (264 psi load) ASTM D-648 oF 210
    Vicat Softening Point ASTM D-1525 of 239
    Maximum Continuous Service Temperature -- of 180
    Coefficient of Thermal Expansion ASTM D-696 in/in/of 3.5 x 10-5
    Coefficient of Thermal Conductivity Cenco-Fitch BTU•in/hr•ft2oF 1.3
    Horizontal Burn (Flame Spread) ASTM D-635 inch/min 1.1
    UL 94 Rating UL 94 UL Classification HB
    3mm Transparent Clear Transmittance--Total ASTM D-1003 % 80
    Haze ASTM D-1003 % Less than 3.0
    Surface Resistivity ASTM D-257 ohms/sq 106-108
    Surface Resistance EOS/ESD S11.11 ohms 105-107
    Electrostatic Decay FTS 101C Method 4046.1* sec Less than 0.05
    * Federal Test Standard 101C, Method 4046.1 as described in EIA-541, Appendix F, Measurement of Electrostatic Decay Properties of Dissipative Planar Materials


    Chemical Resistance ASTM D-543
    Samples immersed in the specified chemicals for 24 hours at room temperature and then visually examined
    Chemical Surface Attack Visual Evaluation
    Deionized Water None Clear
    30% Sodium Hydroxide None Clear
    30% Sulfuric Acid None Clear
    30% Nitric Acid Slight pitting Cloudy
    48% Hydrofluoric Acid Severe Attack White, rubbery
    Methanol None Clear
    Ethanol None Clear
    Isopropyl Alcohol None Clear
    Acetone Severe pitting Very cloudy and rubbery
    Methylene Chloride Sample dissolved Sample dissolved


    Light Transmission Spectral Analysis
    1. Acrylic plastic is a combustible thermoplastic. Avoid exposure to flame and excessive heat. Observe fire precautions appropriate for comparable forms of wood and paper.
    2. For building applications, comply with applicable code regulations.
    3. Clean with soap and water. Do not use abrasives. Avoid inappropriate contact with solvents.



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