Surface coverings having a natural appearance and methods to make a surface covering having a natural appearance

• US 6,114,008 A
• Filed: 05/20/1999
• Issued: 09/05/2000
• Est. Priority Date: 02/20/1997
• Status: Expired due to Fees

• Current Assignee: Mannington Mills of Delaware Incorporated
• Original Assignee: Mannington Mills Incorporated (Mannington Commercial Incorporated)
• Inventors: Chen, Hao A., Burns, Alonzo M. Jr., Eby, John M.
• Primary Examiner(s): Krynski, William
• Assistant Examiner(s): SHEWAREGED, BETELHEM
• Application Number:
  US09/315,126
• Time in Patent Office: 474 Days
• Field of Search: 428/201, 428/151, 428/156, 428/158, 428/172, 428/304.4
• US Class Current: 428/151
• CPC Class Codes: B29C 44/06 Making multilayered articles B29C44/0407 - B29C44/0492 take precedence
• CPC Class Codes: B44C 1/24 Pressing or stamping ornamental designs on surfaces
• CPC Class Codes: B44F 9/02 wood grain effects
• CPC Class Codes: B44F 9/04 of stone surfaces, e.g. marble
• CPC Class Codes: D06N 3/06 with polyvinylchloride or its copolymerisation products surface treatment or foaming for floor coverings D06N7/0007
• CPC Class Codes: D06N 3/08 with a finishing layer consisting of polyacrylates, polyamides or polyurethanes or polyester
• CPC Class Codes: D06N 7/001 obtained by mechanical embossing
• CPC Class Codes: D06N 7/0015 use of inhibitor for the blowing agent or inhibitor for the kicker, e.g. trimellitic anhydride, triazole
• CPC Class Codes: Y10T 428/24438 Artificial wood or leather grain surface
• CPC Class Codes: Y10T 428/24479 including variation in thickness
• CPC Class Codes: Y10T 428/24496 Foamed or cellular component
• CPC Class Codes: Y10T 428/24612 Composite web or sheet
• CPC Class Codes: Y10T 428/24851 Intermediate layer is discontinuous or differential
• CPC Class Codes: Y10T 428/249953 Composite having voids in a component [e.g., porous, cellular, etc.]

Abstract

A method for making a surface covering is disclosed which includes providing a surface covering having a backing layer, a foamable layer, and a design layer, wherein the design layer includes a portion of a pattern printed with at least one retarder composition. A wear layer is then provided on the design layer and the wear layer is cured. The foamable layer is thereby expanded to form a foam layer, and the pattern printed with at least one retarder composition is chemically embossed. The cured product is subsequently cooled to ambient temperature and then the top surface of the wear layer is subjected to a sufficient temperature to soften the wear layer. After being softened the wear layer is mechanically embossed with a surface texture, the embossed surface texture is set in the wear layer, and a top coat may then be provided on the embossed set wear layer. A surface covering having the various features described above is also disclosed. Preferably, the surface covering and the method for making the surface covering have a natural wood, stone, marble, granite, or brick appearance wherein the design layer includes one or more joint or grout lines created with at least one retarder composition and the wear layer is mechanically embossed with the surface texture of a wood, stone, marble, granite, or brick surface.

Claims

1. A floor covering having a natural wood, stone, marble, granite, or brick appearance, comprising:

a backing layer;

a foam layer located on said backing layer and having a chemically embossed portion;

a design layer located on said foam layer and having a design selected from the group consisting of natural wood, stone, marble, granite, and brick, wherein said design includes joint or grout lines corresponding to said chemically embossed portion; and

a wear layer located on top of said design layer and mechanically embossed to form a mechanically embossed portion with a surface texture selected from the group consisting of natural wood, stone, marble, granite, and brick, wherein the surface texture is mechanically embossed in the wear layer when said wear layer is in a softened state and wherein said chemically embossed portion has an emboss depth greater than the emboss depth of any portion of said mechanically embossed portion.

2. The floor covering of claim 1, wherein said wear layer comprises polyvinyl chloride.

3. The floor covering of claim 1, wherein said joint or grout lines are chemically embossed with a retarder composition comprising acrylic resin binder, alcohol, water and an inhibitor selected from the group consisting of tolyltriazole, benzotriazole, fumaric acid, malic acid, hydroquinone, dodecanethiol, succinic anhydride, and adipic acid.

4. The floor covering of claim 3, wherein said inhibitor is tolyltriazole.

5. The floor covering of claim 1, wherein said surface covering further comprises a top coat located on said mechanically embossed wear layer.

6. The floor covering of claim 5, wherein said top coat comprises acrylated urethane.

7. The floor covering of claim 1, wherein said surface covering further comprises a strengthening layer located between said backing layer and said foam layer.

8. The floor covering of claim 1, wherein a portion of said design comprises a non-retarder ink composition.

9. A floor covering comprising:

a backing layer;

a foam layer located on said backing layer and having a chemically embossed portion;

a design layer located on said foam layer and having a design; and

a wear layer located on said design layer and mechanically embossed to form a mechanically embossed portion with a surface texture, wherein said wear layer is applied to said foam layer prior to curing and foaming, wherein the surface texture is mechanically embossed in the wear layer when said wear layer is in a softened state and wherein said chemically embossed portion has an emboss depth greater than the emboss depth of any portion of said mechanically embossed portion.

10. The floor covering of claim 9, wherein said surface covering further comprises a top coat located on said mechanically embossed wear layer.

11. A floor covering, comprising;

a backing layer;

a foam layer located on said backing layer and having a chemically embossed portion;

a design layer; and

a cured wear layer having a mechanically embossed portion with a surface texture located on said design layer, wherein said design layer and said wear layer are applied to said foam layer prior to curing and foaming, and wherein a chemically embossed portion of said foam layer has an emboss depth greater than the emboss depth of any portion of said mechanically embossed portion.

12. The floor covering of claim 11, wherein said wear layer comprises polyvinyl chloride.

13. The floor covering of claim 11, wherein said chemically embossed portion is chemically embossed with a retarder composition comprising acrylic resin binder, alcohol, water and an inhibitor selected from the group consisting of tolyltriazole, benzotriazole, fumaric acid, malic acid, hydroquinone, dodecanethiol, succinic anhydride, and adipic acid.

14. The floor covering of claim 13, wherein said inhibitor is tolyltriazole.

15. The floor covering of claim 11, wherein said surface covering further comprises a top coat located on said mechanically embossed wear layer.

16. The floor covering of claim 15, wherein said top coat comprises acrylated urethane.

17. The floor covering of claim 11, wherein said surface covering further comprises a strengthening layer located between said backing layer and said foam layer.

18. The floor covering of claim 11, wherein said design layer comprises a design, a portion of which comprises a non-retarder ink composition.