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First aid tape

A medical adhesive composition is applied to one side of a substrate as an adhesive layer, and used by adhesion to the skin in the form of a medical adhesive tape or sheet. The adhesive layer of a medical adhesive tape to be adhered to the human skin for the protection of the skin, fixing something to the skin and the like, and a tape preparation for percutaneous absorption to administer a drug to the body through the human skin is required to have a sufficient adhesive force for adhesion to the skin, as well as the property to allow release or removal from the skin surface (cohesive force) after use, without staining. Since the medical pressure sensitive adhesive tape is intended to be applied to human skin, and often applied over a long period of time, it is designed after due consideration so as not to cause rash. Specifically, as a base material of the medical pressure sensitive adhesive tape, is generally used a fabric, nonwoven fabric, plastic film, or the like having good flexibility and gas permeability. In order to prevent sweat generated by sweating from remaining in a site applied, a base material made of a material having excellent moisture permeability is also used. Further, a base material having good stretchability so as to permit conforming to the movement of human skin has been developed. An adhesive tape or sheet for application to skin generally has an adhesive layer formed on at least one surface of a substrate, and is adhered to the target skin surface via the adhesive layer. The adhesives used for an adhesive layer of such adhesive tape or sheet for application to skin are generally classified into rubber adhesives and acrylic adhesives. As a pressure sensitive adhesive for the medical pressure sensitive adhesive tape, a pressure sensitive adhesive such as the rubber, acrylic or silicone type, which neither exerts a sensitizing effect on skin nor causes marked skin irritation, is used. The adhesive strength of the medical pressure sensitive adhesive tape is required to be sufficiently high to an extent that absorbent cotton, gauze, bandage, catheter, tube, poultice or the like can be fixed. On the other hand, the adhesive strength of the medical pressure sensitive adhesive tape is controlled so as to lower to an extend that the horny layer on skin surface is not markedly separated upon the peeling of the pressure sensitive adhesive tape, thereby avoiding causing rash.

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