Perforated binder for laminated wound dressing

Inventors

DeWitt, David • Veal, Jonathan

Assignees

Convatec Inc

Abstract

A method of manufacturing a laminated dressing that includes providing a lower layer having a fiber material that directly contacts a patient's skin and a wound area, providing an upper layer that has a foam or foam-like material that absorbs exudate and moisture, and binding the fiber-based lower layer and the foam-based upper layer with a binder layer comprising a binder material, the binder layer including a series of perforations. The perforations in the binder layer are formed by removing material from the binder layer with a pattern coated adhesive sheet prior to binding the fiber-based lower layer and the foam-based upper layer.

Core Innovation

The invention relates to a laminated dressing that includes a fiber lower layer configured to directly contact a patient's skin and a wound area, and an upper layer comprising a foam material configured to absorb exudate and moisture. The fiber-based lower layer and the foam-based upper layer are bound together with a binder layer comprising a binder material, the binder layer including a series of perforations.

A manufacturing method is provided in which the perforations in the binder layer are formed by removing material from the binder layer with a pattern coated adhesive sheet prior to binding the fiber-based lower layer and the foam-based upper layer. A related fabrication approach brings a binder layer into contact with a pattern-coated adhesive sheet, makes a series of closed-loop cuts in the binder layer, and moves the binder layer away to remove portions of the pattern coated adhesive with the binder layer to form a series of cleared perforations.

The disclosure explains that polymer-based binder melting during fabrication can make the binder layer moisture-impermeable, and that perforations in the binder layer enable moisture/exudate passage to support wound drying and wound infection prevention. Optional antimicrobial agents are described, including inorganic or metal-based controlled release agents, and the layers are described in terms of example fiber materials and foam materials.

Claims Coverage

The document includes two independent claims. Across them, the coverage focuses on a laminated dressing structure with a perforated binder layer used to bind a skin-contacting fiber lower layer to an exudate-absorbing foam upper layer, and fabrication methods that form the binder perforations using a pattern-coated adhesive sheet and closed-loop cuts to create cleared perforations.

Together, the independent claims require a laminated dressing with a perforated binder layer binding a skin-contacting fiber lower layer and an exudate-absorbing foam upper layer, and manufacturing/fabrication steps that use a pattern-coated adhesive sheet and closed-loop cuts to form cleared perforations for the binder layer prior to lamination.

Stated Advantages

Documented Applications