| 摘要 |
<p>The invention relates to polymeric materials with which implementing packagings for food products. These packagings retain an active principle able to prolong the shelf life of the contained product and to limit each type of deterioration and/or degradation. It further allows to subject the food product to less drastic and destructive treatments during the sterilization phase before the packaging. The active principle is confined in the polymeric material, immobilized with ionic bonds to a lamellar organic solid so as to obtain an intercalation compound which is easily dispersed in the packaging. The packaging, coming in contact with the food product, can allow, under particular conditions, the discharge of the active principle and the scattering thereof in the food product, or it can be fixed in the packaging by performing a barrier action. The polymer matrix can be constituted by any type of thermosetting or thermoplastic polymeric material, pure or mixed with other materials, pure or with organic or inorganic fillers, with synthetic or natural origin. The system at issue can be used for any type of food packaging, such as for example flexible films, polycoupled films, basins, bags, small pots, etc.</p> |
