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Increasing receptivity for acid dyes

a technology of acid dyes and dyes, applied in the direction of dyeing process, thin material processing, textiles and paper, etc., can solve the problems of reducing the uptake of anionic dyes, difficult dyeing, and reducing the uptake of acid dyes in manufacturing

Inactive Publication Date: 2007-03-01
MOHAWK BRANDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention relates to a process for improving the ability of cationic dyeable nylon fibers to be dried with anionic dyes. This is useful for creating carpets and floor coverings that have increased shade and stain resistance. The process involves applying a coating of a cationic polymer that enhances the fiber's receptivity to acid dyes, followed by dyeing with an anionic dye. The resulting dye sites contain all the acid dyes from the dyeing step, and the stain resistance of the treated fibers is not diminished. The process can be applied to yarns before being made into carpets or to carpet fabrics. The invention also includes a group of cationic polymers that improve anionic dye receptivity. The coating can be applied using various methods such as pad bath, spray, printing, and inkjet coating."

Problems solved by technology

Various polymers such as cationic dyeable nylon used as a carpet fiber are difficult to dye and have reduced uptake of anionic dyes as compared with acid dyeable nylon.
However, while useful this resistance to acid dyes reduces the uptake of acid dyes in manufacturing when compared to acid dyeable nylon.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example

[0013] Increased acid dyeing levels have been achieved by applying an anionic dye receptive coating to cationic dyeable nylon yarn. A solution of the cationic styrene acrylic copolymer TruDot® P-2673 (1% to 7.5%) with a corresponding amount of crosslinking agent XAMA® 220 (0.6 to 0.1%) was applied in a space dyeing machine (without dye). The coated yarns were tufted into carpet. Acid dyes, specifically premetallized acid dyes were applied from a bath containing the dyes and necessary dye auxiliaries at 600% wet pick up on the weight of the carpet. The carpet was steamed for 8 minutes in a lab steamer simulating a saturated steamer on a continuous carpet dye range. Cold tap water was used to rinse any residual dye and chemical from the carpet, followed by drying. The resulting carpet exhibited a multi-tone appearance and deeper shade than the control fabric.

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Abstract

Dye receptivity of fibers used in the dyeing and printing of cationic dyeable nylon as used as carpet fibers or similar polymers difficult to dye with anionic dyes are improved by a coating rendering these fibers more receptive to anionic dyes.

Description

[0001] This invention relates to treating fibers used in the dyeing and printing of cationic dyeable nylon as used in carpet fibers or similar polymer difficult to dye with anionic dyes to render the cationic dyeable fibers more receptive to anionic dyes. BACKGROUND [0002] Various polymers such as cationic dyeable nylon used as a carpet fiber are difficult to dye and have reduced uptake of anionic dyes as compared with acid dyeable nylon. [0003] Nylon carpet fiber is generally classified as to type, depending upon the nylon's receptivity to acid or anionic dyes and basic or cationic dyes. Cationic dyeable nylons contain within the polymer structure sufficient SO3H groups or COOH groups (which groups are receptive to cationic or basic dyes) to render the nylon fiber dyeable with cationic dyes. Acid dyeable nylons are essentially conventional nylons, such as polyhexamethylene adipamide and polycaprolactam. Acid dyeable nylons vary as to type and are characterized as being weakly dyed ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D06P3/00
CPCD06P1/525D06P1/655D06P3/04D06P3/06Y10T428/23993
Inventor BELL, MICHAEL E.
Owner MOHAWK BRANDS