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Assignee3M Innovative Properties Company
InventorsPhilippe Reiterer, Jean Le Normand, Roy Parmentier, Christopher J. Carter
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The present invention provides a web material useful as a tack pad comprising a non-woven cross-laid web which is needle-tacked and at least one of chemically or thermally-bonded and at least one major surface of which is impregnated with a tackifier. The invention also provides a dispenser that will accept a stack of tack pads. The dispenser is shaped to contain a stack of tack pads in position over an outlet opening in the bottom of the dispenser and to permit one access to one edge of the bottom pad of the stack. The edge is located inside the dispenser and the dispenser comprises an at least partially open front and a door mounted on the dispenser. The door may be pivoted between an open position and a closed position over the front. The door has turned-back side edges to fit around the dispenser to prevent dust from entering the dispenser. The bottom pad can be pulled downwardly away from the stack through the outlet opening.
A tack pad having opposite major surfaces and a thickness of at least about 5 mm comprising a non-woven cross-laid carded web having a multi-layer structure which is needle-tacked and bonded, at least one major surface of which is impregnated with an acrylic tackifier.
A method of making a tack pad comprising the steps of forming a non-woven cross-laid multi-layer web which includes carded thermo-bonding fibers, needle tacking the cross-laid web to provide a web having a thickness of at least about 5 mm, impregnating at least one major surface of the needle tacked web with a heat-reactive acrylic tackifier, and heating to thermally-bond the web and cure the tackifier.
Dependencies are inferred from the claim text.