Adhesives having a microreplicated topography with a contact area of at least 35, preferably 85-96 to provide for adequate fluid egress without adversely affecting adhesion to the supporting substrate

摘要

Adhesives having a microreplicated topography are prepared from contacting a microembossed pattern which is a surface having an effective 3-D pattern that generates a maximum difference of less than 45 mm to a layer of adhesive. When an adhesion interface is established between the layer of adhesive and a supporting substrate, the topography of the adhesive surface controls the performance of the adhesion interface. The adhesive has a contact area of at least 35%. Articles having microreplicated adhesive surfaces are also disclosed that have an advantage of providing microchannels for fluids egress for an effective period of time. Multiple microembossed patterns produce microreplicated adhesive surfaces having both microchannels for fluid egress and pegs for improved adhesive properties.