Pressure sensitive adhesive article and method of making
First Claim
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1. A pressure activated adhesive article, comprising:
- a pressure activated adhesive layer having a backing layer supporting an adhesive adapted to extrude under pressure; and
a deformable porous layer overlying said adhesive layer opposite said baking layer and covering said adhesive;
said porous layer having a predetermined thickness to prevent said adhesive from contacting surfaces in contact with said porous layer such that a portion of said thickness furthest from said adhesive is not filled with said adhesive;
said porous layer including pores sized to permit extrusion of said adhesive therethrough, whereby pressure applied to the article causes deformation of said porous layer and extrusion of said adhesive through said pores to render the article adhesive.
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Abstract
A pressure sensitive adhesive article comprising a pressure sensitive adhesive layer and a porous layer affixed to the adhesive layer. The porous layer includes pores sized to permit passage of the adhesive therethrough to render the pressure sensitive adhesive article adhesive. A method of making a pressure sensitive adhesive article by forming a pressure sensitive adhesive layer and attaching a porous layer on one side of the adhesive layer. The porous layer having pores sized to permit passage of the adhesive therethrough.
89 Citations
19 Claims
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1. A pressure activated adhesive article, comprising:
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a pressure activated adhesive layer having a backing layer supporting an adhesive adapted to extrude under pressure; and a deformable porous layer overlying said adhesive layer opposite said baking layer and covering said adhesive;
said porous layer having a predetermined thickness to prevent said adhesive from contacting surfaces in contact with said porous layer such that a portion of said thickness furthest from said adhesive is not filled with said adhesive;said porous layer including pores sized to permit extrusion of said adhesive therethrough, whereby pressure applied to the article causes deformation of said porous layer and extrusion of said adhesive through said pores to render the article adhesive. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of making a pressure activated adhesive article, the method comprising the steps of:
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forming a pressure activated adhesive layer having an obverse side and a reverse side; attaching a backing layer on said reverse side; and attaching a deformable porous layer overlying said obverse side, said porous layer having a predetermined thickness to prevent said adhesive from contacting surfaces in contact with said porous layer such that a portion of said thickness furthest from said adhesive is not filled with said adhesive;
said porous layer including pores sized to permit extrusion of said adhesive therethrough.
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Specification