| Résumé : |
A new acrylic technology is now capable of delivering polymers that have very low stiffness yet are tough and low tack. Consequently, leather finished with these basecoat polymers maintain a soft hand. This is an important development because the leather industry is showing an increasing demand for soft leathers. Clearly, soft leathers must begin with the appropriate retan/fatliquoring to deliver the desired temper out of the crust. But for those leathers that are finished, and most are, there is increasing pressure to maintain the crust softness. This calls for finishes that do not firm the leather but at the same time are not tacky. Because this new technology produces acrylates that are low tack, basecoats exhibit excellent plate release and processability, in addition they mold exceptionally well when embossed. End-use application of a polymer with such performance characteristics appears to almost universal. Leather with the greatest finish add-on (splits an auto upholstrery) exhibit the highest level of temper control vs. standard finishes. However, commercial acceptances in furniture upholstery, garment leather and side leather for shoes and accessories have demonstrated widespread utility of this technology.
This technology will be referred to as "SB" technology and currently has applications only for basecoats. The goal of this paper is to describe the unique features of such a polymer technology, relative to both traditional acrylics as well as polyurethane dispersions (PUds), and to explore the market opportunities |
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A new acryllic technology for finishing soft leathers in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVII, N° 12 (12/1992)
