Converting Solutions Blog

FAQ: What’s the best way to ensure a strong bond from adhesive tapes?

Posted on Wed, Aug 12, 2015

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For the best adhesive bond, focus your attention on making the best application:

Below are the four factors that contribute to the successful bonding of an adhesive to a surface. Please note these are general guidelines - your application may require additional care.

 

a. Surface Preparation: To obtain optimum adhesion, the bonding surfaces must be well unified, clean and dry. Typical surface cleaning solvents are IPA/water mixture (rubbing alcohol) or heptane.

b. Acceptable Temperature: While it’s always best to read the label, for most testing “room temperature” is a rule of thumb. If exposures introduce extreme temperatures in either direction you’ll want to look more carefully at the chemistry.

c. Maximum Surface Contact: Bond strength is dependent upon the amount of adhesive-to-surface contact developed. Firm application pressure develops better adhesive contact and helps improve bond strength. A rule of thumb is to apply at least 15 psi (100 kPa) in roll down or platen pressure.

d. Adequate Dwell Time: Dwell time is how long the adhesive is left before it’s ready. These next rules of thumb are general - check the label for your product.  For many adhesives applied at room temperature, approximately 50% of the ultimate strength will be achieved after 20 minutes, 90% after 24 hours and 100% after 72 hours.

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