Knowde Enhanced TDS
Identification & Functionality
- Product Type
- Technologies
Features & Benefits
- Ready-to-Use Product Features
Applications & Uses
- Applications
- Application Method
- Compatible Substrates & Surfaces
- Typical Use
This series of adhesives is designed to bond non-polar and polar surfaces such as polypropylene to aluminum and other metals using injection or over-molding processes. They will also bond metals to a variety of plastics and TPE/TPO/TPV, including Santoprene™. Since there are so many choices of metals and plastics in this class, testing is necessary to establish that a good bond is provided with a given application.
- Coating Method
An adhesive dry film thickness of 0.3-1.0 mils should be applied to the metal surface and then dried to evaporate the water. The adhesive may be applied to metal foil by gravure printing, nip-fed reverse roll or wire wound bar coating methods; however, care must be taken to prevent blocking as these adhesives may be slightly tacky. It may be necessary to interweave a release film or to run chill rolls on the oven output to avoid roll blocking. Brush, spray, or a paint roller may be used for unique shapes. Dry the adhesive in a forced air oven up to 300°F for a brief time to yield an adhesive dry thickness between 0.3 and 1.0 mils.
- Clean Up
Wash the equipment with water to remove the wet adhesive. Dry coating removal will require a toluene solvent wash for best results. Toluene is a flammable solvent and must be used according to OSHA safety standards.
Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Density | 8.8 - 8.9 | lbs/gallon | — |
| Solids by Weight | 41 - 45 | % | — |
| pH | 8 - 9 | — | — |
| Viscosity | 100 - 200 | cps | — |
| Weight per Gallon | 8.8 - 8.9 | lbs. | — |
Technical Details & Test Data
- Test Sample Preparation
Adhesive activation was accomplished at 250°F., 40 PSI, for 10 seconds using a laboratory heat sealer. Your conditions may differ depending upon the heat sealer and specific adherents. These adhesives were also evaluated using a Boy 15S injection molder with molds set up to make 1”x5”x0.125” peel test samples. The back mold in which the metal was inserted was heated to 200°F and the front mold where the polymers where injected was chilled with constant loss cold tap water. Metal parts should be preheated prior to molding to 180-200°F.