|Recommended application guide for UHB Foamed Acrylic Tapes & Double Sided Tape Systems.
These methods will assist in obtaining optimum surface adhesion.
SURFACE PREPARATION GUIDE:
All surface contact areas must be free from dirt, grease, wax, moisture and contaminants such as release agents used on plastics, residual detergents, oil from skin and loose particles from unsealed surfaces.
In addition to chemical cleaning it may be necessary to use an abrasive pad to prepare surfaces such as bare metals, heavily contaminated surfaces, remove old paint, rust & oxides. Please ensure to remove all dust with a lint-free wipe.
Surface Energy Suitability:
Please see attached diagram for surface degree of difficulty.
For Low Surface Energy surfaces please contact us for suitable adhesive tapes to test.
The bond strength is a direct function of the contact between the adhesive and the substrates. Good surface contact is attained by high application pressure, which can be obtained, for instance, by using a squeegee, pressure roller or pressure fixture. Generally this results in a better bonding contact than the application by hand. The way the pressure is applied and the amount of pressure depend on the materials used. It is therefore necessary to co-ordinate the application pressure parameters with the materials.
Please bear in mind that, depending on the adhesive system used, it may take up to 72 hours to attain the final bond strength.
Please make sure that the ends of the parts to be joined are strain-free. Shear and tensile loads acting on the bonded parts must be able to spread over the entire adhesive surface. Long- lasting tensions generally have a negative impact on the bond strength.
PROCESSING / APPLICATION TEMPERATURE:
Optimum processing temperatures (object temperature and ambient temperature) range from +15°C to +30°C. We do not recommend working at higher temperatures unless adhesive systems that were especially developed for that purpose are used. If the tape is applied below the recommended temperature, the adhesive may harden, compromising the desired adhesion.
The formation of condensate must always be avoided. Condensate can form only when the adhesive tape and/or the substrate is moved from a cold area to a warmer one. In such cases, sufficient time should be allowed between trans-portation and application so that the temperatures of all parts to be joined become similar and rise to a value within the above-mentioned temperature range.
Adhesive tapes must be stored in their original packing at 20°C and relative humidity of 50%. High relative humidity & direct sunlight must be avoided at all costs. Normal storage timeframe from date of manufacture is 12 months.
Remember: Pressure sensitive tapes ideally require around 15psi (100 kPa) to achieve good “wet out”, however this will be affected by the smoothness of the two surfaces and the ambient temperature.
Note – Application Temperature:
These processing instructions are based on our know-how and experience. They do not explain all bonding aspects to be taken into account. The user is expected to have subject-specific knowledge and know-how. Because of the large number of potential influences resulting from processing, bonding and use we recommend that you conduct tests on our products before using them for special applications. Our data do not imply any guarantee of specific properties.
For more specific information on application of our tape products, contact our helpful sales team.