3M 3748 VO

3M 3748 VO Datasheet
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  • Description for 3M 3748 VO

    A tough, flexible, thermoplastic hot melt. Self-extinguishing, meets UL 1410 requirements.

    *See Terms of Use Below

    Application Type Bond, Pottant / Encapsulant, Sealing, Fixture
    1 Part or 2 Part 1 Part
    Material Form Sticks
    Substrate Aluminum, Ceramic, Plastic: Epoxy, Plastic: Phenolic, Glass, Metal, ABS, Plastic: Polyethylene, Polycarbonate, Polypropylene, Douglas Fir , FRP, Polyolefin, ThermoPlastic
    Industry Electrical, Electronics: Printed circuit boards (PCBs), Instruments, Printed wiring Board
    Manufacturer 3M
    Chemistry Hot melt, Polyolefin
    Cure Method Hot melt
    Viscosity (cPs) 8,500, 5,000, 3,300, 5,500
    Color Light Yellow
    Chemical Resistance 1, 1, 1 - trichloroethylene, Acetone, Freon® TF, Freon® TMC, Isopropyl Alcohol, RMA Flux
    High Temperature Resistance (°C) 52, 25, High, Good thermal shock resistance, 79
    Low Temperature Resistance (°C) -40, -100, -20
    Key Specifications UL94 - VO; UL 1410, Mil-Spec (United States Military Standard): Mil S-46163

  • Technical Data

    Overview
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    Specifications
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  • Best Practices

    *See Terms of Use Below

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  • Comparable Materials

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Shear Strength Type Cure Time Cure Temperature Cure Humidity Substrate Test Temperature Test Method
275 psi 22°C On Douglas Fir 22°C
215 psi Overlap shear strength 1,440 min 22°C 50 % FR-4 to FR-4 21°C 3M TM C 3096, 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 then conditioned 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 recording strength at failure.
275 psi Overlap shear strength 1,440 min 22°C 50 % Fir to Fir 21°C 3M TM C 3096, 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 then conditioned 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 recording strength at failure.
250 psi Overlap shear strength 1,440 min 22°C 50 % Polypropylene to Polypropylene 21°C 3M TM C 3096, 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 then conditioned 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 recording strength at failure.
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Peel Strength Type Substrate Test Temperature Test Method
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38 piw 180° Peel strength Wire Mesh to FR-4 C 3168, 1" x 4" Douglas Fir specimens are bonded with hot melt adhesive using a 1" overlap shear configuration. Bonds are then conditioned for 24 hours at 70°F (22°C), 50% relative humidity before testing. Bonds are subjected to 2 lbs. per square inch load at 100°F (49°C) for 30 minutes. Temperature of the bond line is raised every 30 minutes until failure. Heat resistance recorded is the last temperature prior to bond failure.
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79°C Temperature at which adhesive fails
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1,400 V/mil ASTM D 149, 11 mil sample
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0.00100 ASTM D 150, 1 kHz
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4.5e17 (ohms/sq.) ASTM D 257
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6.0e17 (ohms/cm) ASTM D 257
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