Mushroom and loop material closure system for high shear strength and low peel strength applications

A nondisposable device with a secure but releasable closure system, the device comprising:

• a body having first and second portions;
• and
• the closure system comprising means attached to the first and second portions for fastening the first and second portions, the means comprising a first closure element having a base with mushroom-shaped elements fixed to and extending from one side thereof, the mushroom-shaped elements having semi-spherical heads and a second closure element having a base with loop elements fixed to and extending from one side thereof for engaging the mushroom-shaped elements to fix the first and second closure elements together, the loop elements being disposed in a random or irregular arrangement for engaging the mushroom-shaped elements in a variety of random orientations to provide enhanced shear strength in all directions and acceptable peel strength,
• wherein the mushroom density is between about 256 and 441 mushrooms per square inch, and the loop density is between about 196 and 900 loops per square inch, thereby providing a shear strength of greater than 50 psi and a peel strength of between about 5 and 8 psi.

A nondisposable medical device with a secure but releasable closure system, the device comprising:

• a body having first and second portions;
• and
• the closure system comprising means for fastening the first and second portions, the means comprising a first closure element having a base with mushroom-shaped elements fixed to and extending from one side thereof, the mushroom-shaped elements having semi-spherical heads, and a second closure element having a base with loop elements fixed to and extending from one side thereof for engaging the mushroom-shaped elements to fix the first and second closure elements together, the mushroom elements being spaced random or irregular distances from each other for engaging the loop elements in a variety of orientations to provide high shear strength in all directions and acceptable peel strength,
• wherein the mushroom density is between about 256 and 441 mushrooms per square inch, and the loop density is between about 196 and 900 loops per square inch, thereby providing a shear strength of greater than 50 psi and a peel strength of between about 5 and 8 psi.