Drywall joint tape with dual purpose adhesive backing

Patent metadata

Field	Value
Publication number	US-11066576-B2
Application number	US-201615270123-A
Country	US
Kind code	B2
Filing date	Sep 20, 2016
Priority date	Sep 21, 2015
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A joint tape to be applied to wallboard is provided and includes a base substrate having opposing sides. In certain embodiments, a first adhesive layer is applied to one of the sides of the base substrate and a second adhesive layer is applied to the first adhesive layer, where the first adhesive layer is different than the second adhesive layer. In certain other embodiments, two different adhesives are used in a single adhesive layer. In use, the joint tape is positioned over and removably secured to a joint or corner between adjacent wallboard panels using the first adhesive layer. After the joint tape is in position, joint compound is applied to the joint tape, and the water in the joint tape activates it to form a secure bond with the wallboard panels.

First claim

What is claimed is:

1. A joint tape to be applied to wallboard, the joint tape comprising:
a base substrate having a first side and an opposing, second side, said base substrate being made of a non-swelling cellulose material, said non-swelling cellulose material including fibers; and
a single adhesive layer applied to said first side of said base substrate, wherein said adhesive layer is formed by a mixture of at least two adhesives, a first one of said at least two adhesives configured to form a bond with the wallboard, and a second one of said at least two adhesives being a water-activated adhesive that is configured to form a bond with the wallboard,
wherein said base substrate is at least partially water absorbent to enable water to soak through said base substrate from said second side to said first side and activate said second one of said at least two adhesives,
wherein the bond formed between the second one of said at least two adhesives and the wallboard is stronger than the bond formed between the first one of said at least two adhesives and the wallboard, and
wherein a shear strength of the joint tape is 48 to 62 pounds.

2. The joint tape of claim 1 , wherein said first one of said at least two adhesives forms a weak bond with the wallboard such that the base substrate is removable and repositionable on the wallboard.

3. The joint tape of claim 1 , wherein said adhesive layer is applied to an entire surface of said first side of the base substrate.

4. The joint tape of claim 1 , wherein said cellulose material is paper.

5. The joint tape of claim 1 , wherein said fibers comprise at least one of polyester fibers, glass fibers and polymer fibers.

Assignees

• United States Gypsum Co

Inventors

• Rosenthal Guy
• Hargrove Pamela L
• Adcock Joseph
• Negri Robert

Classifications

• C09J7/21 Primary

  Paper; Textile fabrics · CPC title

• C09J2301/208

  the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive · CPC title

• C09J2301/306

  the adhesive being water-activatable · CPC title

• C09J2401/006

  in the substrate · CPC title

• C09J7/32 Primary

  Water-activated {adhesive}, e.g. for gummed paper · CPC title