Method of producing dyed nylon walk-off mats having improved washfastness, and mats produced thereby
USRE36668E · kind E · reissue
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7References
6Claims
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Key dates
| Filing date | May 24, 1999 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | May 24, 2019 |
Classification
- Technology area (CPC —)General
Abstract
A method of making a dyed nylon walk-off mat having improved washfastness includes dyeing nylon yarn, or a tufted nylon mat, in a fiber reactive dye solution having a pH in the range of about 0.5 to about 2.5. The yarn is then heated, such as by steam, at a temperature above 200.degree. F., after which the yarn is treated with an alkaline solution followed by a heat treatment. A backing, such as of rubber or vinyl, is applied to the mat at an elevated temperature. The application of the backing at elevated temperature, and the heat treatment subsequent to application of the alkaline solution, may be performed simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.