3M 3747
Harmonization Code : 3214.10.00 | Putty and other mastics | Resin cements, caulking compounds and other mastics
Main features
- Dissimilar-Substrate Hot-Melt Bonding
- Rapid Strength Development in Seconds
- 45-Second Open Time
Product Description
3M™ Hot Melt Adhesive 3747 is a 100% solids, thermoplastic general-purpose adhesive designed for bonding dissimilar substrates. Containing no VOCs, this tan-colored hot melt adhesive applies easily and sets in seconds without the need for clamping. It provides an open time of 45 seconds and is highly effective for a wide variety of assemblies, including joining wood to plastic and fabric to metal.
Key features
- Fast setting time: Adhesive sets and obtains high-performance strength in seconds, eliminating the need for clamping.
- Versatile bonding: General-purpose formulation easily bonds dissimilar substrates such as wood to plastic and fabric to metal.
- Easy to use: 100% solids, VOC-free formula provides a 45-second open time for easy handling on large assemblies and surfaces.
Applications / Suitable for
- Woodworking applications
- General industrial bonding
- Bonding dissimilar substrates like wood to plastic and fabric to metal
Technical Specifications
General Properties
Color
Tan
The color
Density (g)
0.97 g/cm3
Thermal Properties
Flash Point
509 °C
The flashpoint of a solvent is the lowest possible temperature at which it can vaporize to form an ignitable vapor.
Flashpoint is often confused with “autoignition temperature”, which is the temperature at which a solvent ignites without an ignition source.
Physical Properties
Open time
<1 (45 seconds) minutes
Viscosity
4,100 mPa.s
Viscosity is a measurement of a fluid’s resistance to flow.
Viscosity is commonly measured in centiPoise (cP). One cP is defined as
the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP.
A product like honey would have a much higher viscosity -around 10,000 cPs-
compared to water. As a result, honey would flow much slower out of a tipped glass than
water would.
The viscosity of a material can be decreased with an increase in temperature in
order to better suit an application
Mechanical Properties
Peel Strength
20 piw
Physical Properties
Softening point (Melting point)
104 °C
Additional Information
Technical properties
As-supplied / before-processing properties
Typical properties; these values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Color | Tan | - | Solid |
| Density | 0.97 | g/cm³ | - |
| Viscosity | 4,100 | cP | at 375°F |
| Flash Point | 509 | °F | Cleveland Open Cup ASTM D 92-72 |
| Open Time | 45 | seconds | 1/8" bead on non-metallic substrates at 75°F |
Technical properties
After-processing / final-state properties
Typical properties; these values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Shear Strength | 430 | psi | Overlap shear measured on Douglas Fir to Douglas Fir |
| Peel Strength | 20 | piw | Flexible canvas bonded to Douglas Fir |
| Heat Resistance | 145 | °F | Highest temperature supporting a 2 psi dead load (63°C) |
| Ball & Ring Melt Point | 220 | °F | ASTM E28-67 (104°C) |
