Self-adhesive articles

Private users only come into contact with these adhesives in the form of self-adhesive articles such as labels, adhesive tape, etc. As such, these adhesives represent no hazard to private users in practice. Such articles are manufactured industrially using adhesives in the form of solutions, but mostly using dispersions and melts. 

The self-adhesion (autohesion) of polymers is of considerable practical importance as many moulding operations involve the need for streams of merging polymer melt to self-adhere to form a strong bond necessary to the integrity of the moulded article. Mechanisms of polymer diffusion are discussed in Polymer diffusion reptation and interdigitation and theories that relate interfacial structure to strength in Polymer-polymer adhesion models. In the latter article, the vector percolation (VP) model was described, which is here applied to welding, and the practical consequences of its predictions are drawn out. - ... 

The book consists of short, self-contained articles on scientific, engineering and industrial aspects of adhesion. They are arranged alphabetically. In many cases, the titles have been chosen to keep related articles together so that they can be read in seqnence. 

The release effect of the LDPE film used for backing self adhesive coatings can be considerably enhanced by the addition of 2-3% amide wax. It is also available as an antiblocking system in granular form. This antiblocking system is also used successfully in the production of film and sheeting of injection-molded articles from EVA copolymers. 

Chemical force microscopy (CFM) will be used as a synonym for AFM using defined surface chemistry, for instance self-assembled monolayer functionalization, on AFM probe tips in order to measure differences in suriace chemical composition (using friction or adhesion differences related to interactions between functional groups or atoms exposed on both tip and sample surface as contrast) throughout this review article. 

Adhesives are often based on blends to optimize the key properties of interest, but as they are often designed for specific applications, the blend compositions are rarely disclosed. However, a large number of patents exist related to adhesive compositions. Blends of alky(meth)acrylates and poly(vinyl alkyl ethers) were described for self-adherent (Tg < 10 °C) adhesives or hot melt adhesives for labels, adhesive tapes or films [171]. Hot melt adhesives based on a blend of poly(vinyl alcohol) and copolymers of alkyl(meth)acrylates and other vinylic monomers were described for paper, wood and other cellulosic articles [172]. The PVOH based hot melt adhesives offer the advantage of repulpability for paper/cellulosic products requiring adhesives. A waterborne adhesive for coating friable surfaces (e.g., chalky weathered paint or masonry) was described as comprising a blend of separate emulsion polymers [173]. The examples noted blends of a MMA-nBA-MAA emulsion terpolymers with MMA-nBA emulsion copolymer with the copolymer having a particle size less than 120 nm. 

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