In search of the cause of adhesive failure

Failure of adhesive bonds is most commonly due to surfaces that have been poorly pretreated or are contaminated. If such adhesion problems occur and an obvious explanation of the defect cannot be found, surface analytical methods (for example XPS, ToF-SIMS) are mostly used to understand the cause of the failure. The selection of the analysis method depends primarily on the exact failure pattern and the information that is already available. Talk to us if you would like to know more about the analytical options! The following example of delaminated address labels was solved using ToF-SIMS.

tin cans

Adhesive failure of labels

Loss of adhesion upon exposure to heat

The use of self-adhesive labels is established in many production areas. The failure of labels can, therefore, lead to serious problems.

This was the case for a large transport company, whose packages sometimes lost their address labels at higher outside temperatures, resulting in delays in delivery or actual loss of the transported goods.

A ToF-SIMS analysis of failing transport labels showed contamination of the adhesive side with a modified polysiloxane that was not detected on the adhesive side of flawless label lots. Based on this knowledge, the chemical composition of the adhesive film was specified more precisely.

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