A CLEANLY REMOVABLE, RECLOSABLE FASTENING SYSTEM
Publication Date: 2008-Aug-22
The IP.com Prior Art Database
A skin layer of a pressure sensitive adhesive was applied to both sides of a foam layer. This in turn was applied to the backside of at least one part of a reclosable fastener. It was found this construction could be adhered to a wide variety of substrates, including glass, metal, ceramic, and painted sheetrock, and still be cleanly removed even after several months.
Reclosable fastening systems are well known. Examples include the brands VELCRO™, DUAL LOCK™, and SCOTCHMATE™. These systems contain two parts that mate together with a high strength yet can be reopened and reclosed several times.
In some versions of these products a pressure sensitive adhesive is applied to the backside of at least one of the parts in order to adhere it to a target substrate. Over time, the adhesion level can build up such that attempts to remove the part from the substrate result in damage to the substrate. Another problem that is often encountered is failure between the interface of the part and the adhesive. This results in a tacky adhesive residue being left on the substrate.
In order to overcome these problems and provide a cleanly removable fastening system the following construction was developed. A skin layer of a pressure sensitive adhesive was applied to both sides of a foam layer. This in turn was applied to the backside of at least one part of a reclosable fastener.
For example, a layer of pressure sensitive adhesive based on synthetic rubber (ca. 42 micrometers thick) was applied to each side of a closed cell polyethylene foam (ca. 730 micrometers thick) having a density of approximately 18 lbs./ft3 to provide an adhesive foam. This was rolled up using a single protective release liner and stored until further u...