Objective
The increasing use of greasy leathers as material for uppers in footwear manufacture, in accordance with market demand, is causing serious problems in the manufacturing process due to the difficulty of obtaining guaranteed adhesion of these leathers to material used for the soles of footwear. With the cooperation of tanners, footwear manufacturers and adhesive producers we propose to tackle the problem through research with the double objective of establishing criteria between the composition of greasy leathers and their suitability for adhesion, and developing new procedures which will guarantee the strength of the sole-upper bonding with these types of leathers.
Analysing the results obtained, the following conclusions can be reached:
1. The conventional procedures used for the bonding of greasy leathers entail a high level of complexity and in most cases, involve an incompatibility between adhesive and leather.
2. The influence of the proportion of removable greasy matter in the leather as well as its composition has been analysed to establish the leather's bonding capabilities. Alternative greasy products have been proposed along with a simple method to predict the bonding capacity of the greasy leather by means of an analysis of its grease extract using thin layer chromatography.
3. New products for the treatment of greasy leathers have been developed that increase compatibility between leathers and adhesives, one of which has been selected to establish a new, simple bonding method that can be adapted to normal manufacturing procedures.
4. The effectiveness of this new bonding method has been proved, including for water based polyurethane adhesives used in the bonding.
5. The new bonding procedure has achieved good results in the industrial trials overall, and one company is already using it in the manufacture of one of its types of footwear.
The work will be carried out collectively by the laboratories in such a way that if the final result is successful it will mean a useful tool which can later be applied and adapted to individual cases in the different manufacturing processes (leathers, adhesives, footwear).
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology mechanical engineering manufacturing engineering
- natural sciences chemical sciences polymer sciences polyurethane
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Coordinator
03600 Elda
Spain
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