Method for forming material

A method of forming a dressing for a wound, the method comprising:

• subjecting liquid to an electric field at an outlet in a vicinity of the wound thereby causing the liquid to form at least one jet of electrically charged liquid, the liquid being such that, after formation, the at least one jet forms a charged fiber that is attracted to said wound and deposits onto said wound or breaks up into charged fiber fragments that are attracted to and deposited onto said wound so as to form a mat or web on said wound;
• and
• incorporating skin cells into said mat or web.

A method of forming a dressing for a wound, the method comprising:

• subjecting a liquid to an electric field at an outlet in a vicinity of the wound to cause the liquid to form at least one jet of electrically charged liquid, the liquid being such that, after formation, the at least one jet forms a charged fiber or charged fiber fragments which is/are attracted to and deposited onto said wound to form a layer on said wound, repeating the subjecting of the liquid to form at lest one further layer or fiber or fiber fragments on said layer and interspersing skin cells in or between said layers.

A method of forming a dressing or covering on a surface, which method comprises:

• supplying a liquid containing a polymer to a liquid outlet directed towards the surface;
• subjecting the liquid that issues from the liquid outlet to an electric field to generate at least one electrically charged liquid jet which then forms electrically charged polymer matter comprising at least one of electrically charged polymer fiber, electrically charged polymer fiber fragments and electrically charged polymer particles;
• and spraying the electrically charged polymer matter with an oppositely charged spray or cloud.

A method of providing a dressing or covering on a surface, which method comprises:

• supplying a liquid containing a polymer to a liquid outlet;
• subjecting the polymer containing liquid that issued from the liquid outlet to an electric field while regulating a flow of the liquid to the liquid outlet to cause the liquid to generate at least one electrically charged jet that partially solidifies to form electrically charged gel-like matter comprising at least one of electrically charged fiber, electrically charged fibrils and electrically charged particles which are electrically attracted to and deposit onto the surface.

A method of providing a wound dressing, the method comprising:

• a) supplying liquid comprising a bioresorbable inert polymer to at least one outlet;
• b) subjecting the liquid at an outlet to an electric field thereby causing the liquid to form at least one jet of electrically-charged liquid, the liquid being such that after the formation the at least one jet forms charged fibers which are attracted to and deposited onto a surface to form a mat.

A method of providing a wound dressing, the method comprising:

• a) supplying liquid to at least one outlet;
• and
• b) subjecting the liquid at an outlet to an electric field thereby causing the liquid to form at least one jet of electrically charged liquid, the liquid being such that after the formation the at least one jet forms charged fibers, wherein at least a portion of the fibers include collagen, and at least a portion of the fibers include at least one active component selected from thrombin, fibrinogen and mixtures thereof, which fibers are attracted to and deposited onto a surface to form a mat.

A method of providing a wound dressing, the method comprising:

• a) supplying liquid to at least one outlet;
• b) subjecting the liquid at an outlet to an electric field thereby causing the liquid to form at least one jet of electrically charged liquid, the liquid being such that after the formation the at least one jet forms charged fibers which are attracted to and deposited onto a surface to form a mat, the mat comprising more than one layer of fibers, and wherein skin cells are interspersed between fiber layers.

A method of providing a wound dressing, the method comprising:

• a) supplying liquid to at least one outlet;
• b) subjecting the liquid at an outlet to an electric field thereby causing the liquid to form at least one jet of electrically-charged liquid, the liquid being such that after formation the at least one jet forms charged fibers, wherein the fibers are coated with a surfactant, which fibers are attracted to and deposited onto a surface to form a mat.