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Surfaces with low surface energies may undergo corona or flame treatment in order to raise its surface energy. [15] However even if a surface has high energy, contaminants on the surface can interfere with the adhesive's ability to bond to the surface. The presence of contaminants such as dust, paper, and oils will reduce the contact area for ...
Likewise, contaminants, especially those which, due to their low surface tension, counteract wetting by the adhesive (for example, oils, release agents, etc.) hinder the adhesion interaction. Contaminants form, as it were, a barrier between the adhesive and the substrate which cannot be bridged by the adhesion forces due to their short reach.
For a peel ply, a thin, woven piece of material is applied to the adherend during fabrication. [9] Because the material is woven, it will leave a torturous surface when removed, which will improve bonding by mechanical interlocking. [6] Prior to adhesive bonding, the woven material acts to protect the surface of the adherend from contaminates.
Some removable adhesives are designed to repeatedly stick and unstick. They have low adhesion and generally cannot support much weight. Sometimes clean removal of pressure sensitive tape can be difficult without damaging the substrate that it is adhered to. Pulling at a slow rate and with a low angle of peel helps reduce surface damage.
To incorporate the effect of adhesion in Hertzian contact, Johnson, Kendall, and Roberts [5] formulated the JKR theory of adhesive contact using a balance between the stored elastic energy and the loss in surface energy. The JKR model considers the effect of contact pressure and adhesion only inside the area of contact.
To fix peeling paint, identify the issue first, then ensure your substrate is prepared properly. Find the Cause Before fixing peeling paint, it's important to understand why your first attempt failed.
The primary component of tape upon which an adhesive is applied. Examples are cloth, paper, metal foil, plastic film, etc. Conformability. Ability of a tape to make total contact with a rough or uneven surface. Creped. Paper that has small "folds" to provide stretchability and conformability. Double-coated, or two-sided tape. Pressure-sensitive ...
The distribution of the shear stress is described by the Carter-Fromm solution. It consists of an adhesion area at the leading edge of the contact area and a slip area at the trailing edge. The length of the adhesion area is denoted ′. Further the adhesion coordinate is introduced by ′ = + ′.