| 摘要 |
A material formed of collagen and gelatin may be produced by admixing gelatin with an aqueous dispersion of collagen of an isoelectric point not exceeding 6.2 in an amount of 0.05 to 2 parts by weight of gelatin per part by weight of collagen; adjusting the pH of the mixture to from 3 to 3.5 by the addition of an aqueous acid solution; and forming said material therefrom. The mechanical strength of such a material, in particular its tear strength, is higher than that of a corresponding material made from collagen only. The collagen may be prepared by first cross-linking or acetylating a hide to reduce the isoelectric point of the original collagen in said hide and then obtaining collagen fibres from the thus-treated hide. Electrodeposition and extrusion techniques can be employed to produce the material, which can be used as an outer skin for foods. The material, in aqueous dispersion, may be treated by application of an electric current. |
