Variable texture floor covering
View Patent ↗A floor covering has an exposed surface with substantially the same gloss level and at least two portions having different tactile surface characteristics. The difference in the tactile surface characteristics between the two portions is at least an average RPc of 4. The floor covering includes a substrate and a high performance coating overlying the substrate. The high performance coating comprises texture particles, which may be organic polymer particles. The floor covering is made by forming a high performance coating including the texture particles on a substrate, at least partially curing the high performance coating, and then while controlling the temperature of the high performance coating below the melting point temperature or softening point temperature of the texture particles and above the temperature at which the texture particles deform under the applied mechanical embossing pressure, subjecting the first and second portions to different mechanical embossing conditions.
1. A method of making a floor covering having variable tactile surface characteristics comprising:
a) forming a high performance coating comprising texture particles on a substrate,
b) then at least partially curing the high performance coating,
c) then while controlling the temperature of the high performance coating below a melting point or a softening point of the texture particles and above temperature and pressure conditions at which the texture particles deform under an applied mechanical embossing pressure, mechanically embossing the high performance coating with a mechanical embossing tool wherein
(i) a first portion of the high performance coating is subjected to a first average pressure and a second portion of the high performance coating is subjected to a second average pressure, or
(ii) controlling the temperature of a first portion of the high performance coating at a first temperature and controlling the temperature of a second portion of the high performance coating wherein the first portion of the high performance coating and the second portion of the high performance coating are subjected to substantially the same average pressure, or
(iii) controlling the temperature of a first portion of the high performance coating at a first temperature and controlling the temperature of a second portion of the high performance coating wherein the first portion of the high performance coating is subjected to a first average pressure and the second portion of the high performance coating is subjected to a second different average pressure, and
d) then cooling the mechanically embossed high performance coating, whereby the tactile surface characteristic of the first portion is different than the tactile surface characteristic of the second portion by at least an average RPc of 4.
2. The method of claim 1 , wherein the temperature of the high performance coating during the mechanical embossing step is between approximately 10° F. and approximately 400° F. below the melting point or the softening point if the melting point or the softening point is no greater than 575° F., and between approximately 250° F. and approximately 450° F. below the melting point or the softening point if the melting point or the softening point is greater than 575° F.
3. The method of claim 1 , wherein a difference in the 60° gloss level across the floor covering is no greater than about 5.
4. The method of claim 1 , wherein the at least partial curing is the result of subjecting the high performance coating to ultra-violet radiation.
5. The method of claim 1 , wherein the substrate is chemically embossed prior to mechanically embossing the high performance coating.
6. The method of claim 5 , wherein the substrate is chemically embossed after the high performance coating is applied to the substrate.
7. The method of claim 1 , wherein the texture particles are organic polymer particles.
8. The method of claim 7 , wherein the texture particles are selected from the group consisting of nylon particles, man-made wax particles, natural wax particles, polyolefin particles, Teflon particles, polyetheretherketone particles, ethylene and chlorotrifluoroethylene copolymer particles, polyester particles, urea-formaldehyde polymer particles, polyacrylate particles, polycarbonate particles, polyvinylchloride particles, polyimide particles and combinations thereof.
9. The method of claim 1 , wherein the difference in the first average pressure and the second average pressure results from (i) one or more peaks on the mechanical embossing tool corresponding to the first portion having a greater height than the one or more peaks on the mechanical embossing tool corresponding to the second portion, (ii) the one or more peaks on the mechanical embossing tool corresponding to the first portion and the one or more peaks on the mechanical embossing tool corresponding to the second portion having substantially the same height, but the widths of the one or more peaks being different, or (iii) the substrate being chemically embossed.
10. A method of making a floor covering having a tactile surface characteristic of a first predetermined average RPc value comprising;
a) forming a high performance coating comprising texture particles on a substrate,
b) then at least partially curing the high performance coating,
c) then while controlling the temperature of the high performance coating below a melting point or a softening point of the texture particles and above temperature and pressure conditions at which the texture particles deform under an applied mechanical embossing pressure, mechanically embossing the high performance coating at a predetermined desired average pressure, and
d) then cooling the mechanically embossed high performance coating, whereby the tactile surface characteristic can be varied to a second predetermined average RPc value by varying the temperature and/or pressure of the high performance coating during mechanical embossing to a different predetermined temperature and/or pressure.
11. The method of claim 10 , wherein the temperature of the high performance coating during the mechanical embossing step is between approximately 10° F. and approximately 400° F. below the melting point or the softening point if the melting point or the softening point is no greater than 575° F., and between approximately 250° F. and approximately 450° F. below the melting point or the softening point if the melting point or the softening point is greater than 575° F.
12. The method of claim 10 , wherein the texture particles are selected from the group consisting of nylon particles, man-made wax particles, natural wax particles, polyolefin particles, Teflon particles, polyetheretherketone particles, ethylene and chlorotrifluoroethylene copolymer particles, polyester particles, urea-formaldehyde polymer particles, polyacrylate particles, polycarbonate particles, polyvinylchloride particles, polyimide particles and combinations thereof.