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
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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.
Claims26
A drywall tape to reinforce a drywall joint, comprising:
- a nonwoven fabric 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 to comprise a low profile thickness nonwoven fabric having a substantially planar first side and a substantially planar second side;
- and
- a reinforcement scrim comprising elongated reinforcing strands of low profile thickness, laid and noninterlaced, or interlaced and bonded or unbonded, wherein the scrim is bonded against the first side of the nonwoven fabric, such that the scrim and the nonwoven fabric reinforce each other to reinforce a joint compound while imbedded in the joint compound of the drywall joint.
A method of making a drywall tape, comprising:
- bonding together randomly oriented chopped glass fibers with a resinous adhesive to resist forces exerted in random directions, wherein the chopped glass fibers are laid flat to comprise a low profile thickness nonwoven fabric having a substantially planar first side and a substantially planar second side;
- and
- bonding a reinforcement scrim comprising elongated reinforcing strands of low profile thickness, laid and noninterlaced, or interlaced and bonded or unbonded, wherein the scrim is bonded against the first side of the nonwoven fabric, such that the scrim and the nonwoven fabric reinforce each other to reinforce a joint compound while imbedded in a joint compound of a drywall joint.
A drywall joint of low profile thickness 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, the drywall tape comprising a nonwoven fabric reinforced by a reinforcement scrim having reinforcing strands of low profile thickness joined against a first substantially planar side of the nonwoven fabric, the reinforcement strands being embedded in the first layer of the joint compound;
- the nonwoven fabric comprising chopped glass fibers bonded to one another with interstices between the fibers being open to penetration by the first layer of joint compound, such that the thickness of the first layer between the nonwoven fabric and the drywall sections is reduced by penetration of the first layer of joint compound into the interstices;
- a second layer of the joint compound filling the interstices and covering the nonwoven fabric;
- and
- the chopped glass fibers being laid flat in the nonwoven fabric to comprise a low profile thickness nonwoven fabric, and being random laid to resist forces exerted in random directions.
A method of constructing a drywall joint, comprising:
- filling substantially an opening with a joint compound between opposed edges of drywall sections;
- applying 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;
- adhering a drywall tape to the first layer, the drywall tape comprising a nonwoven fabric reinforced by a reinforcement scrim having reinforcing strands of low profile thickness joined against a side of the nonwoven fabric;
- the nonwoven fabric comprising chopped glass fibers bonded to one another with interstices between the fibers being open to penetration by the first layer, wherein the chopped glass fibers are laid flat in the nonwoven fabric to comprise a low profile thickness nonwoven fabric, and wherein the chopped glass fibers being random laid to resist forces exerted in random directions;
- applying pressure to the drywall tape to embed the reinforcement scrim in the first layer and to penetrate at least some portion of the first layer into the interstices to bring the nonwoven fabric closure to the drywall sections;
- and
- applying a second layer of the joint compound to penetrate the interstices, wherein at least some portions of the second layer and the first layer, respectively, bond to each other within the interstices of the nonwoven fabric.
Dependencies are inferred from the claim text.