Condensate can form only when the adhesive tape and/or the substrate is moved from a cold area to a warmer one. The formation of condensate must always be avoided. If the tape is applied below the recommended temperature, the adhesive may harden, compromising the desired adhesion. We do not recommend working at higher temperatures unless adhesive systems that were especially developed for that purpose are used. Optimum processing temperatures (object temperature and ambient temperature) range from +15☌ to +30☌. Long- lasting tensions generally have a negative impact on the bond strength. Shear and tensile loads acting on the bonded parts must be able to spread over the entire adhesive surface. Please make sure that the ends of the parts to be joined are strain-free. Please bear in mind that, depending on the adhesive system used, it may take up to 72 hours to attain the final bond strength. It is therefore necessary to co-ordinate the application pressure parameters with the materials. The way the pressure is applied and the amount of pressure depend on the materials used. Generally this results in a better bonding contact than the application by hand. Good surface contact is attained by high application pressure, which can be obtained, for instance, by using a squeegee, pressure roller or pressure fixture. The bond strength is a direct function of the contact between the adhesive and the substrates. Best bonding results are generally achieved on smooth surfaces, however on textured or uneven substrates it is important to select & test a suitable tape with a thicker carrier & a heavier adhesive mass.Glass surfaces may need to be primed especially if used in high humidity conditions.Some materials such as copper, bronze, lead & plasticized vinyl may need to be sealed or primed prior to applying the tape.Ensure that any sealers used are fully cured prior to applying the tape. Most porous surfaces such as concrete, wood, plaster, & fabrics need to sealed for effective tape bonding.Please contact us for primer information. Low Surface Energy substrates may need to be chemically primed before tape application to ensure an effective bonding surface.Please see attached diagram for surface degree of difficulty.įor Low Surface Energy surfaces please contact us for suitable adhesive tapes to test. Please ensure to remove all dust with a lint free wipe. In addition to chemical cleaning in maybe necessary to use an abrasive pad to prepare surfaces such as bare metals, heavily contaminated surfaces, remove old paint, rust & oxides. All surfaces must be dry, free from moisture before applying the tape.Remove all residues with a clean, lint free wiping cloth (ensure you wipe in one direction to prevent cross contamination).Since not every cleaning agent is suitable for every substrate, please check the cleaning agent suitability. Wipe surfaces with a typical cleaning solvent example 50/50 IPA isopropyl alcohol/ water mixture.These methods will assist in obtaining optimum surface adhesion.Īll 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. Click here for brochure Recommended application guide for UHB Foamed Acrylic Tapes & Double Sided Tape Systems.
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