Multi-layered adhesive appliance

Abstract

A body waste collecting device comprising an adhesive composite that fastens a collecting bag to the skin is disclosed. The adhesive composite is highly moisture resistant while still being water absorbing. The adhesive composite comprises at least three layers, a backing layer, a moisture absorbing layer and a thin layer of vapour permeable, low-absorbing adhesive layer.

Description

FIELD OF THE INVENTION[0001]The present invention relates to an adhesive that attaches a collecting device to the human skin e.g. an ostomy device. Such adhesives need to be moisture absorbing to keep the skin dry, but absorbed moisture reduces the adhesive bonding to the skin. This invention discloses a body waste collecting device comprising an adhesive composite that maintains its adhesive properties even after considerable moisture absorption.BACKGROUND[0002]When designing a skin adhesive, one of the major issues is to keep the skin relatively dry underneath the adhesive so as to prevent maceration. Maceration occurs when the skin is unable to get rid of moisture from transpiration and results in degradation of the skin's barrier function as well as bad adhesion of the device to the skin.[0003]Usually, skin adhesive keeps the skin dry by being moisture permeable. This allows moisture to transport through the adhesive from the skin side to the opposite side, where it is allowed t...

AI Technical Summary

Problems solved by technology

Such adhesives need to be moisture absorbing to keep the skin dry, but absorbed moisture reduces the adhesive bonding to the skin.

When designing a skin adhesive, one of the major issues is to keep the skin relatively dry underneath the adhesive so as to prevent maceration.

Maceration occurs when the skin is unable to get rid of moisture from transpiration and results in degradation of the skin's barrier function as well as bad adhesion of the device to the skin.

Adhesives for fastening a bodily waste collecting pouch or tube are usually covered by a moisture impermeable layer that does not allow moisture from the skin to permeate through the adhesive and out into the surroundings.

The major problem in using an absorbing adhesive is that the bonding properties change as the adhesive absorbs moisture.

This effect is particularly a problem for hydrocolloid-based adhesives.

As the adhesive absorbs moisture from the skin, the hydrocolloids swell and take up an increasing amount of space in the skin-bonding zone.

There is further a risk that, if small drops of moisture, e.g. due to active perspiration (sweating) are formed between the skin and the adhesive, small parts of hydrocolloid can be washed out into the droplet and thus reducing bonding between the skin and the adhesive.

The patent does not address the change in properties after moisture absorption in the layer.

To achieve sufficient moisture permeability, lots of particles need to touch each other and this can only be achieved by mixing in large amounts of particles.

Further, the patent does not solve the problem of HC in the surface of the adhesive that can be washed out by active perspiration, destroying the ability of the adhesive to adhere to the skin.

This adhesive is in itself very low absorbing and is thus unsuitable for holding a pouch for collecting bodily waste because of the arguments mentioned above.

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