Drywall tape and drywall joint
AssigneeSaint-Gobain Adfors Canada, Ltd.
InventorsJeffrey J. Dong, D. Geraint Roberts, Garry William Morris, Glenn Stevens
Life of this patent
Estimating the term…
Abstract
The invention pertains to a drywall tape having a nonwoven fabric and a reinforcing scrim, wherein the nonwoven fabric has chopped glass fibers laid flat in the nonwoven fabric, the fibers being substantially straight, random laid and bonded to one another to resist forces exerted in random directions, and the reinforcement scrim has elongated reinforcing strands of low profile thickness joined against a side of the nonwoven fabric, such that the scrim and the nonwoven fabric reinforce each other, and reinforce a joint compound in which the drywall tape is imbedded.
Claims12
A drywall tape to reinforce a drywall joint, comprising:
- a nonwoven fabric component having a first thickness and comprising randomly oriented chopped glass fibers bonded together with a resinous adhesive to resist forces exerted in random directions, wherein the chopped glass fibers are laid flat in the nonwoven fabric;
- a reinforcement lattice component having a second thickness and comprising elongated reinforcing strands and a binder joining the strands;
- wherein the fabric component and the reinforcement lattice component are laminated together;
- and
- a thickness of the fabric component and the reinforcement lattice component laminated together comprises a compressed thickness being less than a sum total of the first thickness of the fabric component and the second thickness of the reinforcement lattice component, wherein the compressed thickness is provided by the fibers of the fabric component being flattened to oval shapes, and by the reinforcing strands of the reinforcement lattice component being flattened to oval shapes.
A drywall joint comprising:
- a joint compound substantially filling an opening between opposed edges of drywall sections;
- a thin first layer of the joint compound contiguous with the first portion and overlying drywall surfaces of the drywall sections adjacent to the opening;
- a drywall tape over the opening and adhered to the first layer of the joint compound, the drywall tape comprising a nonwoven fabric component having a first thickness and comprising randomly oriented chopped glass fibers bonded together with a resinous adhesive to resist forces exerted in random directions, wherein the chopped glass fibers are laid flat in the nonwoven fabric, a reinforcement lattice component having a second thickness and comprising elongated reinforcing strands and a binder joining the strands, wherein the fabric and the reinforcement lattice are laminated together, and a thickness of the fabric component and the reinforcement lattice component laminated together comprises a compressed thickness being less than a sum total of the first thickness of the fabric component and the second thickness of the reinforcement lattice component, wherein the compressed thickness is provided by the fibers of the fabric component being flattened to oval shapes, and by the reinforcing strands of the reinforcement lattice component being flattened to oval shapes;
- the nonwoven fabric having interstices between the fibers being open to penetration by the first layer of the joint compound, such that the thickness of the first later of the joint compound between the nonwoven fabric and the drywall sections is reduced by penetration of the first layer of the joint compound into the interstices;
- and
- a second layer of the joint compound filling the interstices and covering the nonwoven fabric.
Dependencies are inferred from the claim text.