ORIGIN OF THE TECHNIQUES OF JOINING AND THE ADHESIVES

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The use of adhesives was known as of 4500 front JC.

These adhesives were composed of raw materials animal and vegetable, as the adhesive of bone (animal grease) and casein, as well as tar, pitch, waxes, etc It is only at the end of the 19iéme century (in approximately 1876) that one produces the first resin and rubber solutions with benzene which are used for a relatively reliable joining of wood, paper, paperboard, fabrics and leather.

At the beginning of the 20th century, appear the first adhesives containing nitrocellulose which allow an assembly of construction, partly without use of average mechanics. Because of decisive progress in the field of macromolecular chemistry, the bases of the modern techniques of joining were installation. It is into 1949 that the adhesives on the basis of Neoprene are introduced.

The means of joining evolve/move and gain more and more importance in the current methods of industrial production. The advantages of joining are numerous. One can think for example of

Homogeneous distribution of the forces on all stuck surface. - Not - Deterioration of materials contrary to riveting, nailing. - Saving in weight (application on materials low thickness - effect of against plating: low-weight material but of high solidity) . - Widening of the possibilities of combinations of materials.

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