Low profile reinforcing tape

• US 20060207202A1
• Filed: 03/18/2005
• Published: 09/21/2006
• Est. Priority Date: 03/18/2005
• Status: Active Grant

• Current Assignee: Saint-Gobain Adfors Canada Ltd. (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Technical Fabrics Canada Limited (Compagnie de Saint-Gobain SA)
• Inventors: Tucker, Mark W., Newton, Mark J.
• Granted Patent: US 7,482,291 B2
• Time in Patent Office: Days
• US Class Current: 52/255
• CPC Class Codes: C09J 2301/1242 the opposite adhesive layers being different
• CPC Class Codes: C09J 2400/263 in the substrate
• CPC Class Codes: C09J 7/21 Paper; Textile fabrics
• CPC Class Codes: C09J 7/30 characterised by the adhesive composition
• CPC Class Codes: E04F 13/04 Bases for plaster sub-ceilings with plaster-carrying means E04B9/06
• CPC Class Codes: E04F 13/042 Joint tapes
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/197 with noncoplanar reinforcement
• CPC Class Codes: Y10T 428/249955 Void-containing component partially impregnated with adjacent component
• CPC Class Codes: Y10T 428/249986 Void-containing component contains also a solid fiber or solid particle
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 442/2738 Coating or impregnation intended to function as an adhesive to solid surfaces subsequently associated therewith
• CPC Class Codes: Y10T 442/3203 Multi-planar warp layers
• CPC Class Codes: Y10T 442/3366 Woven fabric is coated, impregnated, or autogenously bonded
• CPC Class Codes: Y10T 442/618 Blend of chemically different inorganic microfibers

Abstract

A reinforcing tape 100, for imbedding in a joint compound, has reinforcing yarns defining openings for passage of the joint compound, wherein; the openings are bounded by the yarns; the yarns are provided with one or more coatings adding tensile strength and resistance to pull out of the yarns from the joint compound.

Claims

1. A reinforcing tape for imbedding in a wallboard joint compound, comprising:

reinforcing yarns that are joined together to form an open fabric or scrim to define openings for passage of the joint compound, wherein;

the openings are bounded by the yarns;

the yarns are provided with one or more coatings for adding tensile strength to the yarns, and for adding resistance to pull out of the yarns from the joint compound.

2. The reinforcing tape of claim 1 wherein, said one or more coatings comprise a styrene-butadiene polymer or copolymer with a styrene concentration adjusted to adjust suppleness of the tape.

3. The reinforcing tape of claim 1 wherein, the yarns include zero twist yarns.

4. The reinforcing tape of claim 1 wherein, said one or more coatings comprise a functional coating of a solvent activated, phase changing adhesive.

5. The reinforcing tape of claim 1 wherein;

said one or more coatings comprise a functional coating of a solvent activated, phase changing adhesive;

the phase changing adhesive changing to a liquid phase while in contact with a solidifiable joint compound; and

the phase changing adhesive changing to a solid phase by solidifying together with the joint compound, thereby adhering the yarns to the solidified joint compound and resisting pull out of the yarns therefrom.

6. The reinforcing tape of claim 1 wherein;

the yarns are arranged in a plain weave of, twisted warp yarns and twisted weft yarns;

the yarns have yarn counts of, not greater than 33 tex for one, and not greater than 66 tex for the other;

the warp yarns and the weft yarns are interchangeable, one to the other; and

the weave has a thickness of not greater than 0.18 mm.

7. The reinforcing tape of claim 1, further comprising:

a pressure sensitive adhesive on at least a back side of the tape.

8. The reinforcing tape of claim 7, further comprising:

a blocking agent at an outer surface of the tape.

10. The finished joint of claim 1 wherein, the coating adding tensile strength is a styrene-butadiene polymer or copolymer with a styrene concentration adjusted to adjust suppleness of the tape.

11. The finished joint of claim 1 wherein, the yarns include zero twist yarns.

12. The finished joint of claim 1 wherein, said another coating is a functional coating of a solvent activated, phase changing adhesive.

13. The finished joint of claim 1 wherein;

said another coating is a functional coating of a solvent activated, phase changing adhesive, the phase changing adhesive changing to a liquid phase while in contact with a solidifiable joint compound, and the phase changing adhesive changing to a solid phase by solidifying together with the joint compound, thereby adhering the yarns to the solidified joint compound and resisting pull out of the yarns therefrom.

14. The finished joint of claim 1 wherein;

the yarns are arranged in a plain weave of, twisted warp yarns and twisted weft yarns, the yarns having yarn counts of, not greater than 33 tex for one, and not greater than 66 tex for the other, the warp yarns and the weft yarns being interchangeable, one to the other, the weave having a thickness of not greater than 0.18 mm.

15. The finished joint of claim 1, further comprising:

a pressure sensitive adhesive on at least a back side of the tape.

16. The finished joint of claim 1, further comprising:

a blocking agent at an outer surface of the tape.

9. A finished joint for covering a wallboard seam, comprising:

a joint compound filling the seam;

a reinforcing tape imbedded in the joint compound, the tape having reinforcing yarns that are interlaced to define openings for passage of a joint compound, wherein;

the openings are bounded by the yarns;

the yarns are adapted with a coating adding tensile strength to the yarns; and

the yarns are adapted with another coating adding resistance to pull out of the yarns from the joint compound.

17. In combination, a reinforcing tape embedded in a joint compound, comprising:

reinforcing glass yarns that are joined together to form an open fabric or scrim, said open fabric or scrim containing a plurality of openings for the passage of said joint compound;

said yarns having a first polymeric coating containing an ethylene vinyl acetate, said first coating penetrating said yarns and providing a higher tensile strength to said yarns and also acting as a functional coating, whereby water contained in contained in said joint compound is sufficient to activate said coating, and whereby said coating forms a chemical or adhesive bond with said joint compound so as to resist pull out of said yarns from said joint compound.

18. A reinforcing tape for imbedding in a wallboard joint compound, comprising:

reinforcing yarns that are joined together to form an open fabric or scrim to define openings for passage of the joint compound, wherein;

said one or more coatings comprise a functional coating of a solvent activated, phase changing adhesive;

the phase changing adhesive changing to a liquid phase while in contact with a solidifiable joint compound; and

the phase changing adhesive changing to a solid phase by solidifying together with the joint compound, thereby adhering the yarns to the solidified joint compound and resisting pull out of the yarns therefrom.