3M 3779TC
Harmonization Code : 3214.10.00 | Putty and other mastics | Resin cements, caulking compounds and other mastics
Main features
- 7,000 cP Melt Viscosity at 191 deg C
- 25-Second Open Time
- 149 deg C Load Resistance at 14 kPa
Product Description
3M Hot Melt Adhesive 3779TC is an amber, 100% solids thermoplastic hot-melt adhesive for industrial assembly, including bonding wood, plastics, vinyl, metal, and glass. It is applied at a recommended 177 to 196 deg C and has a typical viscosity of 7,000 cP at 191 deg C. Typical open time is 25 seconds for a 3.2 mm bead on a nonmetallic surface at 24 deg C. The typical temperature-resistance result is 149 deg C under a 14 kPa dead load, distinct from the 163 deg C ball-and-ring melt point by ASTM E28-67. Supported uses include electronics potting, wire-harness attachment, headliners, and trim.
Key features
- 7,000 cP melt viscosity: The typical value is measured at 191 deg C with Brookfield Thermocel spindle 27 at 10 rpm.
- 25-second open time: The typical maximum application-to-joining interval uses a 3.2 mm bead on a nonmetallic surface at 24 deg C.
- 149 deg C dead-load temperature resistance: This typical result is the highest temperature at which the bond supports a 14 kPa load.
Applications
Wire-harness attachment; electronics potting; metal and plastic bonding in appliances; headliner attachment; trim attachment.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Chemical Properties
Other Properties
Additional Information
As-supplied / before-processing properties
Values are typical and not specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Color | Amber | - | Solid adhesive |
| Density | 0.99 | g/cm^3 | Solid adhesive |
| Recommended application temperature | 177 to 196 | deg C | Hot-melt application |
| Viscosity | 7,000 | cP | 191 deg C; Brookfield Thermocel #27 at 10 rpm |
| Open time | 25 | s | 3.2 mm bead on nonmetallic substrate at 24 deg C |
| Delivery time | 75 | s | 25 x 76 mm PG cartridge |
After-processing / final-state properties
Values are typical and not specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| 180 deg peel adhesion | 32 | N/cm | Flexible canvas bonded to Douglas fir at 23 deg C |
| Overlap shear strength | 49 | kg/cm^2 | Douglas fir at 23 deg C |
| Ball and ring melt point | 163 | deg C | ASTM E28-67 |
| Temperature resistance | 149 | deg C | Highest temperature supporting a 14 kPa dead load |
