3748VO

3748VO 3M | Alldatasheet

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February, 2015 3M™ Self-Extinguishing Hot Melt Adhesive 3748 VO Product Description 3M™ Hot Melt Adhesive 3748 VO is a tough, exible, thermoplastic hot melt, 100% solids adhesive which exhibits good peel adhesion and thermal shock properties along with higher heat resistance. It features excellent electrical properties which make it ideal for use on printed wiring board and other electronic bonding applications. Hot Melt Adhesive 3748 VO is self-extinguishing and has a UL 94 VO rating. In addition to electronic applications, it is also useful in many general industrial bonding and sealing applications where a self-extinguishing characteristic is required. Product Features

• Excellent Adhesion • Good Electrical Properties • Non Corrosive to Metal

3M™ Self-Extinguishing Hot Melt Adhesive 3748 VO Technical Information Note The following technical information and data should be considered representative or typical only and should not be used for specication purposes. Typical Uncured Physical Properties Property Values Notes Color Light Yellow Colors may vary from nearly white to yellow/amber. Adhesive performance is not aected by color variation. Base Resin Polyolen Typical Cured Characteristics Shore D Hardness: 26 ConditionsDwell/Cure Time: 60 min @ Room TemperatureMethodsASTM D2240 Typical Performance Characteristics Solvent Resistance Environmental Condition A Immersed in Acetone one hour B Immersed in Acetone 30 days A Immersed in Isopropyl Alcohol one hour B Immersed in Isopropyl Alcohol 30 days B Immersed in Freon TF one hour C Immersed in Freon TF 30 days B Immersed in Freon TMC one hour C Immersed in Freon TMC 30 days B Immersed In 1, 1, 1 - Trichloroethane one hour C Immersed In 1, 1, 1 - Trichloroethane 30 days A Immersed in RMA Flux one hour B Immersed in RMA Flux 30 days Property: Solvent Resistancenotes: A = No attack B = Slight Surface Attack/Softness C = Severe Attack/Breakup

3M™ Self-Extinguishing Hot Melt Adhesive 3748 VO Typical Performance Characteristics (continued) Overlap Shear Strength Substrate 215 lb/in² FR-4 to FR-4 275 lb/in² Fir to Fir 250 lb/in² Polypropylene to Polypropylene 220 lb/in² Polyethylene to Polyethylene Property: Overlap Shear StrengthMethod: 3M C3096notes: 1" x 4" Douglas Fir specimens are bonded with hot melt adhesive using a 1" overlap and 13 mil wire spacer to set bond line thickness. Bonds are thenconditioned for 24 hours at 70°F (22°C), 50% relative humidity before testing. Bonds are pulled in shear at a separation bond speed of 2 inch a minute recordingstrength at failure. 180° Peel Adhesion Substrate 608 oz/in Wire Mesh to FR-4 560 oz/in Wire Mesh to Polypropylene 432 oz/in Wire Mesh to Polyethylene 416 oz/in Wire Mesh to Fir Property: 180° Peel AdhesionMethod: 3M C3168notes: Test involves bonding .020 in wire mesh (galvanized window screen type) to substrate using hot melt adhesive. Wire mesh is encapsulated with adhesive.After conditioning, bond is tested by 180° peel back method using Instron at 10 inches per minute peel speed. Weight Loss by TMA (In Air) Test Condition 1 % 459°F (237°C) 5 % 621°F (327°C) 10 % 673°F (356°C) Property: Weight Loss by TMA (In Air)notes: Temperature of weight loss at 5°C/min Property Values Method Notes Test Condition Two Pound Dead Load Heat Resistance Thermal Shock Resistance Passes 5 cycles w/o cracking 3M C3167 Potted Washer Olyphant test 100°C (air) to -40°C (liquid)

3M™ Self-Extinguishing Hot Melt Adhesive 3748 VO Electrical and Thermal Properties Dielectric Constant Test Condition 2.3 10 KHz, Room Temperature 2.3 100 KHz, Room Temperature 2.3 1 KHz, Room Temperature 0.001 1MHz, Room Temperature 2.3 100 Hz, Room Temperature 2.3 100 MHz, Room Temperature Property: Dielectric ConstantMethod: ASTM D150 Dissipation Factor Test Condition 0.001 10 KHz, Room Temperature 0.001 100 KHz, Room Temperature 0.001 1 KHz, Room Temperature 0.002 100 Hz, Room Temperature 0.001 100 MHz, Room Temperature Property: Dissipation FactorMethod: ASTM D150 Thermal Conductivity 19.2 W/m/K 1.92 × 10^-3 J/cm - sec - °C 1.1 × 10^-1 (btu-ft)/(h-ft²-°F) 4.58 × 10^-4 Cal/s/cm/°C 6 × 10^17 W/m/K Property: Thermal ConductivityTest Condition : 107°F (41°C)notes: On .020" samples Property Values Method Notes Test Condition Dielectric Strength 2.3 V/μm Dielectric Strength 1400 V/mil ASTM D149 11 mil sample Volume Resistivity 4.5 × 10^17 Ω-cm ASTM D257 Room Temperature Coecient of Thermal Expansion -34 × 10^-6 m/m/°C By TMA -100 - -40°C Coecient of Thermal Expansion 154.5 × 10^-6 m/m/°C By TMA -20 - 25°C

3M™ Self-Extinguishing Hot Melt Adhesive 3748 VO Typical Physical Properties Viscosity Test Condition 8500 cP 356°F(180°C) 5000 cP 392°F(200°C) 3300 cP 428°F(220°C) Property: Viscosity Property Values Specic Gravity 1.09 Ball & Ring Softening Point 152 °C 305 °F UL Listing UL 94 - V0 Handling/Application Information Application Equipment

• 3M™ Hot Melt Applicator TC or TCQ • 3M™ Hot Melt Applicator EC - Temperature Module #4 • 3M™ Hot Melt Applicator PG II Storage and Shelf Life Store below 120°F (49°C). When stored at the recommended conditions, this product has a shelf life of 24 months from the date of manufacture. Industry Specications UL 94 - V0 Trademarks 3M is a trademark of 3M. Freon is a registered trademark of E.I. DuPont de Nemours Co. References Property Values 3m.com Product Page https://www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-Hot-Melt-Adhesive-3748-VO?N=5002385+3293241784&rt=rud Safety Data Sheet (SDS) https://www.3m.com/3M/en_US/company-us/SDS-search/results/?gsaAction=msdsSRA&msdsLocale=en_US&co=ptn&q=3748 VO This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9001 standards.

3M™ Self-Extinguishing Hot Melt Adhesive 3748 VO Precautionary Information Information 3M United States 3M Center St. Paul, MN 55144-1000 800-362-3550 www.3M.com Please recycle. © 3M 2021. All Rights Reserved. The brands listed above are trademarks of 3M Refer to Product Label and Material Safety Data Sheet for health and safety information before using this product. For additional health and safety information, call 1-800-364-3577 or (651) 737-6501. Technical Information: The technical information, guidance, and other statements contained in this document or otherwise provided by 3M are based upon records, tests, or experience that 3M believes to be reliable, but the accuracy, completeness, and representative nature of such information is not guaranteed. Such information is intended for people with knowledge and technical skills sucient to assess and apply their own informed judgment to the information. No license under any 3M or third party intellectual property rights is granted or implied with this information. Warranty, Limited Remedy, and Disclaimer: Unless a dierent warranty is specically stated on the applicable 3M product packaging or product literature (in which case such warranty governs), 3M warrants that each 3M product meets the applicable 3M product specication 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, FITNESS FOR A PARTICULAR PURPOSE, OR ARISING OUT OF A COURSE OF DEALING, CUSTOM, OR USAGE OF TRADE. If a 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 for the limited remedy stated above, and except to the extent prohibited by law, 3M will not be liable for any loss or damage arising from or related to the 3M product, whether direct, indirect, special, incidental, or consequential (including, but not limited to, lost prots or business opportunity), regardless of the legal or equitable theory asserted, including, but not limited to, warranty, contract, negligence, or strict liability.