Static Dissipative Plastic
Description
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 coated with SciCron Technologies proprietary, clear, C-350™ static dissipative coating. 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.
Applications
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.
Fabrication
AC-350 Acrylic is easily fabricated into a variety of flat and bent configurations using the same equipment and fabrica-tion techniques generally employed with unsurfaced acrylic sheet products. This product is designed to accommodate heat bending, however, care must be taken to avoid apply-ing too much heat to prevent damage to the C-350 surface. When solvent welding, it is recommended that the C-350 surface be removed to achieve the best bond strengths. 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 build-up 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.
Availability
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 opera-tions. 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
Typical Physical Properties (Typical but not guaranteed values for 0.25 inch cell cast material)
Property | Test Method | Units | AC-350 Acrylic |
Physical Specific Gravity | ASTM D792 | — | 1.19 |
Mechanical Tensile Strength Ultimate Elongation Tensile Modulus Flexural Strength Flexural Modulus Compressive Strength Izod Impact Strength (milled notch) | ASTM D638 ASTM D638 ASTM D638 ASTM D790 ASTM D790 ASTM D695 ASTM D256 | psi % psi psi psi psi ft-lb/inch of notch | 10,000 4.2 400,000 16,500 475,000 18,000 0.4 |
Thermal Deflection Temperature (264 psi load) Vicat Softening Point Maximum Continuous Service Temperature Coefficient of Thermal Expansion Coefficient of Thermal Conductivity | ASTM D648 ASTM D1525 — ASTM D696 Cenco-Fitch | °F °F °F in/in/°F BTU•in/hr•ft2•°F | 210 239 180 3.5 x 10-5 1.3 |
Flammability Horizontal Burn (Flame Spread) UL 94 Rating of the Uncoated Substrate | ASTM D635 UL 94 | in/min UL Classification | 1.1 HB |
Optical 3mm Transparent Clear Transmittance – Total Haze | ASTM D1003 ASTM D1003 | % % | 80 Less than 5.0 |
Electrical Surface Resistivity Surface Resistance Electrostatic Decay | ASTM D257 EOS/ESD S11.11 FTS 101C, Method 4046.1* | ohms/sq ohms sec | 106 – 108 105 – 107 Less than 0.05 |
Chemical Resistance ASTM D543
Samples immersed in the specified chemicals for 24 hours at room temperature and 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 |
Light Transmission
Spectral Analysis
Precautions:
- Acrylic plastic is a combustible thermoplastic. Avoid exposure to flame and excessive heat. Observe fire precautions appropriate for comparable forms of wood and paper.
- For building applications, comply with applicable code regulations.
- Clean with soap and water. Do not use abrasives. Avoid inappropriate contact with solvents.
AC-350-7 5/17
The information and statements contained herein are believed to be accurate, however, users should perform their own testing and verification to determine the durability, applicability and suitability of the products for their own purposes. NOTHING CONTAINED HEREIN SHALL BE CONSTRUED AS A REPRESENTATION OR WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. IMPLIED WARRANTIES OF MERCHANABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY EXCLUDED. All sales are subject to SciCron’s standard terms and conditions of sale.