Perforated, layered wound treatment material

A wound treatment material comprising at least two perforated biomatrix layers which are interconnected by a connecting agent,

• wherein the connecting agent is soluble in water or physiological environment and separable from at least one of the at least two perforated biomatrix layers and is selected from the group consisting of water soluble adhesives, physiologically acceptable spray adhesives, gelatin, and chitosan,
• wherein the at least two perforated biomatrix layers have perforations which are in slot form or in rectangular form offset relative to one another by 90°
• and wherein the at least two perforated biomatrix layers are formed from structure-forming natural polymers selected from the group consisting of animal derived hydrocolloids and plant derived hydrocolloids and mixtures thereof having a fine-porous sponge-like structure wherein an amount of the structure-forming natural polymers in the at least two perforated biomatrix layers is below about 70% by weight,
• wherein the at least two perforated biomatrix layers are obtained by a method comprising the steps:
• (a) preparing an aqueous suspension or solution of at least one structure-forming natural polymer;
• (b) pouring the aqueous suspension or solution into a mold;
• (c) drying the aqueous suspension or solution of step (b) to obtain a porous molded body;
• (d) cutting the porous molded body obtained in step (c) into at least two biomatrix layers;
• and
• (e) perforating the at least two biomatrix layers;
• wherein drying in step (c) comprises freeze-drying.