Patent ID: 8357411

Claim:
A multi-perforated edible collagen film, provided on rolls or in sheets, for use as a food wrapping in the food industry, comprising perforations by means of laser of substantially circular shape with an average ellipticity of less than 0.17 and holes spaced with respect to their nearest neighbors by 3 mm to 14 mm for allowing the escape of air or steam trapped between the film and food wrapped into said film, said film still having sufficient mechanical strength and extensibility to be able to stand food processing steps in manufacture of cooked ham or other foods under industrial conditions and wherein the substantially circular perforations of which having average diameters higher than 300 μm and equal or lower than 800 μm and the perforations deviating from perfectly circular shape having average longest diameters between more than 300 μm and less than 800 μm.