US 6,308,560 B1 · Method and device for determining adhesive performance of flat adhesive products on the skin of humans or mammals

Abstract

A process for ascertaining the adhesive behaviour of pressure-sensitive adhesive flat materials such as medicinal adhesive tape and, in particular, pressure-sensitive adhesive application systems such as transdermal therapeutic systems (TTS) is characterized in that a flat material (5) with an adhesive layer (6) of a defined coating weight per unit area and of defined quality of the adhesive mass is adhered with predetermined surface pressure and at a predetermined temperature to an elastic carrier film (4) of defined thickness and elasticity, and that said carrier film (4) is clamped into a test cell (21), in the manner of a membrane, between half-shells (1,2) of a test cell (21), and that the carrier film (4) along with the adhered flat material (5) is subjected, in chronologically repeated sequence, to loading and unloading with alternating elastic stretchings by defined loading forces from the side facing away from the flat material, and that a detachment of the adhesive layer, which detachment arises progressively per unit of time, is observed and qualitatively and/or quantitatively evaluated.

Claims22

Dependent claims

A process for ascertaining the adhesive behavior of pressure-sensitive adhesive flat materials, comprising:

applying said adhesive flat material to an elastic carrier film such that said adhesive flat material adheres to said elastic carrier film;
enclosing said carrier film having said adhesive flat material adhered thereon in a test cell comprising an upper and a lower compartment having congruent edges, wherein said carrier film is interposed between an upper and a lower compartment of the test cell such that it lies within an internal chamber formed by both compartments of said test cell;
subjecting said carrier film having said adhesive flat material adhered thereon to one or more mechanical stresses or repeated mechanical stresses;
and,
evaluating the degree of detachment of said adhesive flat material from said carrier film in response to said mechanical stress.

2 more elements

A device for ascertaining the adhesive behavior of pressure-sensitive adhesive materials, comprising:

an upper compartment having a first reinforcing edge and a bottom compartment having a second reinforcing edge, wherein the first and second reinforcing edges are releasably retained in tight association to form a test cell having an internal chamber, and wherein said edges serve to fix an elastic carrier film between said compartments, to which carrier film said adhesive material is initially adhered when the device is assembled;
a rotary element which is present within one of said compartments, wherein the rotary element is arranged such that it contacts said carrier film and exerts, in a chronologically repeated sequence, controllable pressure onto said carrier film, thus causing recurrent elastic deformation of said film and subjecting said adhesive material adhered to said carrier film to repetitive mechanical stress, whereby said adhesive material becomes detached from said carrier and the degree of detachment is evaluated for ascertaining the adhesive behavior of the adhesive material;
and
drive means located outside of said compartments and interacting with said rotary element, thus causing said rotary element to rotate.

1 more element

Dependencies are inferred from the claim text.

Method and device for determining adhesive performance of flat adhesive products on the skin of humans or mammals

Life of this patent

Method and device for determining adhesive performance of flat adhesive products on the skin of humans or mammals

Life of this patent

Abstract

Claims22