Technical Data September 2014 3MTM Thermally Conductive Silicone Interface Pads 5591 and 5591S Product Description 3MTM Thermally Conductive Silicone Interface Pad 5591 and 5591S are highly conformable, slightly tacky silicone elastomer pads. These interface pads are designed to provide heat transfer path between heat generating components and heat sinks, heat spreaders or other cooling devices. Features and Benefits * Good thermal stability of the base polymer with excellent softness of the thermal pad. * Good thermal conductivity in an ultra soft silicone polymer base. * The product tack is such that a mechanical means to support the pad in a final assembly is required. Product Construction 3MTM Thermally Conductive Silicone Interface Pad 5591 and 5591S Color Pad Type Pad Thickness* Primary Filler Type Top Liner / 5591S Film Type (film stays with pad) Release Liner Thickness / Type White Filled Silicone Polymer 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm Ceramic 3M pad 5591S - 12 m PET Film Base Liner 4 mils (100 m) Transparent PET / Optionally, 60 m Embossed PE film with transparent blue color is available. *Note: 3 M pad 5591 not available in 0.5 mm thickness. Optional thickness > 2.0 mm are available. Contact your 3M representative for more information. Polyester Film (12 m) = 3M pad 5591S (No film carrier on 3M pad 5591) Filled Silicone Elastomer Release Liner 3MTM Thermally Conductive Silicone Interface Pads 5591 and 5591S Typical Physical Properties and Performance Characteristics Note: T he following technical information and data should be considered representative or typical only and should not be used for specification purposes. Property Value Product Number1 3MTM Thermally Conductive Silicone Interface Pads 5591 and 5591S Thermal Conductivity (W/m-K) 1.0 W/m-K Operating Temperature Range2 Hardness Shore 00 Method 3 -60C to 130/140C Long Term (Weeks-Months) -60C to 160/180C Short Term (Hours-Days) 3M Test Method Shore 00 results depend on test method and thickness of the sample tested. Typical results are in the 10-15 Shore 00 range @ 6 mm test thickness without the PET film. Ask 3M for more details on pad softness. Modified ASTM D2240 Dielectric Breakdown 200 V/mil AC (3M pad 5591S tested) Volume Resistivity Flammability Rating 3M Test Method with low pressure (<10 psi) 2 x 1012 Ohms (3M pad 5591S tested) 3M TM (ASTM D149) ASTM D257 3M pad 5591 has not been tested for UL N/A 3M pad 5591S tested: UL 94 V-1 (0.5mm) and UL 94 V-1 (1.0mm - 5.0mm) UL-94 Notes: 1 3 M pad 5591S has a 12 micrometer PET Film added to provide for a non-tacky surface, increased puncture resistance, and ease of handling and rework. 2 P otential Operating Temperature Range (C). End use application testing will determine final temperature range based on final design and other environmental conditions. Suggested temperature range is based on a 3M Test Method. 3 3M pad 5591S tested with-out PET film on product. Application Guidelines Substrate surfaces should be clean and dry prior to the thermal pad application to help ensure best thermal performance. A clean surface can improve the thermal performance of an application. 1)Isopropyl alcohol (isopropanol) applied with a lint-free wipe or swab should be adequate for removing surface contamination such as dust or fingerprints. Do not use "denatured alcohol" or glass cleaners, which often contain oily components. Allow the surface to dry for several minutes before applying the thermal pad. More aggressive solvents (such as acetone, methyl ethyl ketone (MEK) or toluene) may be required to remove heavier contamination (grease, machine oils, solder flux, etc.) but should be followed by a final isopropanol wipe as described above. Note:Be sure to read and follow the manufacturers' precautions and directions when using solvents. 2)Apply the thermal pad to one substrate at a modest angle with the use of a squeegee, rubber roller or finger pressure to help reduce the potential for air entrapment under the thermal pad during its application. Remove the release liner before application. 3) Assemble the part by applying compression to the substrates to help ensure a good wetting of the substrate surfaces with the thermal pads. Rigid substrates are more difficult to assemble without air entrapment as most rigid parts are not flat. Flexible substrates can be assembled to rigid or flexible parts with much less concern about air entrapment because one of the flexible substrate can conform to the other substrates during application. (2) 3MTM Thermally Conductive Silicone Interface Pads 5591 and 5591S Storage and Shelf Life The shelf life of 3MTM Thermally Conductive Interface Silicone Pad 5591 and 55921 is 12 months from the manufacture date when stored in original packaging at 21C (70F) and 50% relative humidity. Regulatory For regulatory information about this product, contact your 3M representative. Technical Information The technical information, recommendations and other statements contained in this document are based upon tests or experience that 3M believes are reliable, but the accuracy or completeness of such information is not guaranteed. Product Use Many factors beyond 3M's control and uniquely within user's knowledge and control can affect the use and performance of a 3M product in a particular application. Given the variety of factors that can affect the use and performance of a 3M product, user is solely responsible for evaluating the 3M product and determining whether it is fit for a particular purpose and suitable for user's method of application. Warranty, Limited Remedy, and Disclaimer Unless an additional warranty is specifically stated on the applicable 3M product packaging or product literature, 3M warrants that each 3M product meets the applicable 3M product specification at the time 3M ships the product. 3M MAKES NO OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY OR CONDITION ARISING OUT OF A COURSE OF DEALING, CUSTOM OR USAGE OF TRADE. If the 3M product does not conform to this warranty, then the sole and exclusive remedy is, at 3M's option, replacement of the 3M product or refund of the purchase price. Limitation of Liability Except where prohibited by law, 3M will not be liable for any loss or damage arising from the 3M product, whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted, including warranty, contract, negligence or strict liability. Electronics Materials Solutions Division 3M Center, Building 225-3S-06 St. Paul, MN 55144-1000 1-800-251-8634 phone 651-778-4244 fax www.3M.com/electronics 3M is a trademark of 3M Company. Please recycle. (c) 3M 2014. All rights reserved. 60-5002-0134-2 (3)