• Description for 3M 3738

    High delivery rate and long bonding range • General purpose for foundry sand cores, wood bonding, corrugated, selected plastics and chipboard

    *See Terms of Use Below

    Application Type Bond, Seal
    1 Part or 2 Part 1 Part
    Material Form Stick, Pellets
    Substrate Fabric, Flexible Foam, ABS, PolyEthylene, Polyolefins, Polystyrene Foam, Rigid Vinyl, Polycarbonate, Uncoated Cardboard, Plain and coated corrugated, FRP, Polystyrene Foam, Plastic, Wood, Paper, Foams, Uncoated Chipboard, Many plastics, Chipboard, Douglas fir
    Industry Core
    Manufacturer 3M
    Chemistry Jet melt, Hot melt
    Cure Method Hot melt
    Viscosity (cPs) 2,875
    Color Tan
    High Temperature Resistance (°C) 54
    Density (g/cm³) 0.950
    Key Specifications FDA (U.S. Food & Drug Administration) and/or CFIA (Canadian Food Inspection Agency): Applicable 21 CFR 175.105, UL 94 - V2
  • Technical Data for 3M 3738

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 1 Part
    • Material Form
      • Stick
      • Pellets
    • Substrate
      • Foam - Flexible Foam, Foams, Polystyrene Foam
      • Polyolefin - Polyolefins
      • Plastic - ABS, Many plastics
      • Polyethylene (LDPE, HDPE) - PolyEthylene
      • Polystyrene (PS) - Polystyrene Foam
      • Vinyl - Rigid Vinyl
      • Polycarbonate
      • Wood - Uncoated Cardboard, Uncoated Chipboard, Chipboard, Douglas fir
      • Composites - FRP
      • Fabric
      • Paper - Plain and coated corrugated
      • Other - Laminate, Leather, Masonite, Canvas, Sand cores, Other lightweight materials
    • Industry
    • Chemistry
    • Cure Method
      • Hotmelt - Hot melt
    • Color
      • Brown - Tan
    • Key Specifications
      • UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association) - UL 94 - V2
      • FDA (U.S. Food & Drug Administration) and/or CFIA (Canadian Food Inspection Agency): 175.105 - Applicable 21 CFR 175.105
    Specifications
    Cure Specs
    Application Temperature (°F) 351 to 385
    Viscosity (cPs) 2,875 Test Method
    Softening Point (°C) 86, 86 Test Method
    Work / Pot Time (min) 0.83 Test Method
    Bond Strength
    Peel Strength (piw) 13 Test Method
    Shear Strength (psi) 375 Test Method
    Tensile Strength (psi) 360 Test Method
    Material Resistance
    High Temperature Resistance (°C) 54 Test Method
    Hardness
    Elongation (%) 1,000
    Other Properties
    Flash Point (°F) 550.4 Test Method
    % Solids (%) 100
    Density (g/cm³) 0.950
    Business Information
    Shelf Life Details When stored at the recommended conditions, this product has a shelf life of 2 years after 3M ships the product to a customer or distributor
    Shelf Life Temperature (°F) 120
    Shelf Life (mon) 24
  • Best Practices for 3M 3738

    *See Terms of Use Below

    1. Surface Preparation

      Surfaces must be clean, dry and dust free. Wipe with a solvent such as isopropyl alcohol for plastic substrates to aid in removing oil and dirt.

    2. Application

      3M™ Hot Melt Adhesives are designed for application with a 3M™ Hot Melt Applicators. Read and follow the precautions and directions for use in the user’s manual before operating the applicator. 3M™ Hot Melt Adhesives are applied at 350-385°F, except the Low Melt (LM) series which are designed to be applied at 250-275°F. LM series are adhesives designed for lower temperature application but still yield long-lasting bonds. Extruded bead sizes can be customized using 3M™ applicator tips.

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Viscosity Test Methods
Viscosity Test Method Temperature
2,875 cPs Brookfield Thermosel Viscometer in Centipoise. 191°C
Work / Pot Time Test Methods
Work / Pot Time Test Method
0.83 min 1/8" semicircular bead, Douglas Fir to Douglas Fir.
Softening Point Test Methods
Softening Point Unit Test Method
86°C ASTM E-28-99
86°C ASTM E28-67
Shear Strength Test Methods
Shear Strength Substrate Test Temperature
375 psi Douglas Fir 22°C
Tensile Strength Test Methods
Tensile Strength Test Temperature
360 psi 22°C
Peel Strength Test Methods
Peel Strength Substrate Test Temperature
13 piw Canvas bonded to Douglas Fir 22°C
High Temperature Resistance Test Methods
High Temperature Resistance Test Method
54°C Highest temperature that the adhesive will support a 2 psi dead load
Flash Point Test Methods
Flash Point Test Method
288.0°C ASTM D 92-72