Artificial turf and associated devices and methods for making same

Patent metadata

Field	Value
Publication number	US-11268248-B2
Application number	US-201816207776-A
Country	US
Kind code	B2
Filing date	Dec 3, 2018
Priority date	May 14, 2014
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

Implementations herein describe an artificial turf having a backing layer and a plurality of rows of individual tufts tufted into the backing layer. Each tuft comprises at least three yarns per tuft and each one of the at least three yarns varies in at least one of material, color, texture, denier and cross-section. Each row of individual tufts is substantially similar to each adjacent tufted row and adjacent tufts on a given row are spaced apart at a predetermined gauge.

First claim

We claim:

1. A method of making an artificial turf, comprising:
delivering at least first, second, and third distinct yarns from a creel assembly to each respective needle of a plurality of needles;
threading the first, second, and third distinct yarns through an eye of each respective needle of the plurality of needles;
using the plurality of needles to tuft a plurality of rows of individual tufts into a backing layer, wherein each tuft comprises at least the first, second, and third distinct yarns per tuft, wherein each one of the first, second, and third yarns varies from the other yarns of the first, second, and third yarns of the tuft in at least one of material, color, texture, denier, denier per filament, or cross-section;
using a plurality of hook and knife assemblies to hold and cut the individual tufts of the plurality of rows of individual tufts, thereby forming cut tufts,
wherein the first, second, and third yarns of each tuft are not twisted together prior to threading through the eye of each needle of the plurality of needles, and wherein the at least first, second, and third yarns of each tuft are simultaneously delivered, by a single needle of the plurality of needles, through the backing layer to produce the tuft,
wherein the first yarn is a wrap yarn, wherein the second yarn is a slit tape yarn, and wherein the third yarn is a monofilament yarn.

2. The method of claim 1 , wherein the creel assembly comprises at least three post positions associated with each needle of the plurality of needles, and wherein each post position of the plurality of post positions receives a corresponding one of the first, second, and third yarns.

3. The method of claim 2 , wherein each tensioner of a plurality of tensioners is associated with a respective one of the first, second, and third yarns, and wherein the method further comprises using each tensioner to selectively modify a tension of the yarn of the first, second, and third yarns that is associated with the tensioner.

4. The method of claim 3 , wherein the tension associated with each tensioner of the plurality of tensioners is selectively modified such that substantially equal tension between the first, second and third yarns is delivered to each needle of the plurality of needles.

5. The method of claim 4 , further comprising using at least three feed rollers to deliver the respective first, second, and third yarns to the plurality of needles, wherein each feed roller of the three feed rollers is associated with a respective yarn of the first, second, and third yarns.

6. The method of claim 1 , wherein at least one yarn of the first, second, and third yarns of each tuft comprises a textured yarn.

7. The method of claim 1 , further comprising disposing an infill material on a top surface of the backing layer and in between the tufts of the plurality of rows of individual tufts.

8. The method of claim 7 , wherein the infill material comprises at least one of rubber particles, sand or natural materials.

9. The method of claim 1 , wherein at least one of the first, second, and third yarns of each tuft comprises a material selected from the group consisting of LDPE, MDPE, Nylon, PP, PET, PLA, and co-extruded biomaterials thereof.

10. The method of claim 1 , wherein the wrap yarn, the tape yarn, and the monofilament yarn each comprise a respective material selected from the group consisting of LDPE, MIDPE, Nylon, PP, PET, PLA, and co-extruded biomaterials thereof.

11. The method of claim 10 , wherein the wrap yarn comprises polyethylene, wherein the tape yarn comprises polyethylene, and wherein the monofilament yarn is selected from the group consisting of nylon, polyethylene, and polypropylene.

12. The method of claim 11 , wherein the monofilament yarn comprises polyethylene.

13. The method of claim 11 , wherein the monofilament yarn comprises polypropylene.

14. The method of claim 11 , wherein the monofilament yarn comprises nylon.

15. The method of claim 1 , wherein the first, second, and third distinct yarns have respective deniers ranging from 100 to 7,500, and wherein the first, second, and third distinct yarns have a combined denier of 10,800 to 16,600, wherein the combined denier is equal to a total of the respective deniers of the first, second, and third distinct yarns.

16. The method of claim 1 , wherein each row of the plurality of rows of individual tufts is substantially similar to each adjacent row of the plurality of rows of individual tufts.

Assignees

• Columbia Insurance Co

Inventors

• Fowler Gregory D
• Stricklen Phil
• Porter Lisa

Classifications

• D10B2505/202

  Artificial grass · CPC title

• D02G3/445

  Yarns or threads for use in floor fabrics (floor fabrics A47G27/00; floor coverings on textile basis D06N7/0005) · CPC title

• E01C13/08 Primary

  Surfaces simulating grass {; Grass-grown sports grounds (grass-like surfaces for skiing E01C13/12)} · CPC title

• D05C15/36

  by selective cutting of loops · CPC title

• D05C15/10

  operating with a plurality of needles, e.g. in one row · CPC title