METHOD FOR JOINING PLASTIC MATERIALS AND PRODUCTS MADE OF MATERIALS OF VARIOUS KIND, SUCH AS NATURAL LEATHER, REGENERATED LEATHER, NATURAL HIDE, SYNTHETIC HIDE, FABRICS OF ANY KIND, WOOD AND THE LIKE, WITHOUT THE AID OF ANY KIND OF BONDING AGENTS OR

摘要

Method for joining plastic materials and products made of materials of various kind, such as natural leather, regenerated leather, natural hide, synthetic hide, fabrics of any kind, wood and the like, without the aid of bonding agents or adhesive materials, for obtaining products of various kind such as for example chairs, settees, furniture, and relative component elements and furnishings products of various kind, and articles for different uses, etc.. Method in which, before the contact with the molten plastic materials, the materials different than the plastic materials are treated, on to their outer surface of contact with such molten plastic materials, with a pre-treatment composition formed by ethylic alcohol, ammonium nitrate and water, at different and variable ratios depending on the type of the materials to be treated, with the following ratios by weight with respect to the weight of the composition : 1) ethylic alcohol : from minimum 30% by weight to maximum 60% by weight; 2) ammonium nitrate : 30% by weight; 3) water, particularly demineralized water : from minimum 10% by weight to maximum 40% by weight, so as to obtain a temperature decrease of the treated outer surface of said different materials, thanks to the reaction of the ammonium nitrate in presence of the ethylic alcohol-water mixture, which determines an evaporation of the ammonium nitrate and the developing of cooling. The molten plastic material is added with at least a cross-linking agent, preferably hexantriol, and injection moulded over the treated outer surface of the different materials, and cooled by means of said pre-treatment composition.