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Publication Number
US-9393158-B2
Publication Date
2016-07-19
Expiration Date
Abstract
A non-adherent wound dressing (1) comprises a substrate (2) in the form of a perforated sheet of melt-blown non-woven material. The substrate (2) is impregnated with, and coated on both sides with, a silicone gel (3).
Core Innovation
The invention relates to a non-adherent wound dressing comprising a substrate in the form of a perforated sheet of melt-blown non-woven material. The substrate is impregnated with, and coated on both sides with, a silicone gel, and the dressing is readily extensible in all directions.
The perforated melt-blown non-woven substrate is described as non-fibrous and readily extensible in all directions to enable secure application to irregular body parts without adhering to tissue during removal. Silicone gel impregnation and coating on both sides are described as helping minimize silicone separation and loss and as avoiding occluding the perforations.
The document also describes a process in which perforated melt-blown non-woven sheets are impregnated and coated on both sides by applying a silicone gel precursor composition, followed by curing to form the non-adherent wound dressing. The perforations are described as regular arrays, and the silicone gel is characterized as hydrophobic soft silicone, optionally tacky silicone gel.
Claims Coverage
The document includes two independent claims, one product claim and one method claim, covering the non-adherent wound dressing structure and its manufacture. The main inventive features are the perforated melt-blown non-woven substrate, silicone gel impregnation and two-sided coating, and ready extensibility for application to irregular body parts.
Perforated melt-blown non-woven substrate impregnated with and coated on both sides with silicone gel
A non-adherent wound dressing consisting of a substrate in the form of a perforated sheet of melt-blown non-woven material, the substrate being impregnated with, and coated on both sides with, a silicone gel.
Readily extensible non-adherent wound dressing for irregularly shaped body parts
The non-adherent wound dressing is readily extensible in all directions and can be stretched to facilitate application to irregularly shaped parts of the body.
Manufacture by applying silicone gel precursor composition and curing
A method for manufacture comprising providing a sheet of melt-blown non-woven material, applying a silicone gel precursor composition to impregnate the sheet and coat the sheet on both sides, and curing the silicone gel precursor composition to form the non-adherent wound dressing.
The claim coverage centers on a perforated melt-blown non-woven sheet impregnated with and coated on both sides with a silicone gel to form a non-adherent dressing that is readily extensible in all directions and stretchable for application to irregular body parts. The method claim covers applying a silicone gel precursor composition followed by curing to obtain the same dressing.
Stated Advantages
Non-adherent wound dressing for facilitating application to irregularly shaped parts of the body.
Readily extensible in all directions, enabling the dressing to be stretched for application to irregularly shaped parts of the body.
Helps minimize silicone separation and loss.
Avoids occluding the perforations.
Documented Applications
Application to irregularly shaped parts of the body using a readily extensible non-adherent wound dressing.
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