Dyeing method of denim yarns and fabrics

Abstract

In the production method according to the present invention, the binding speed and efficiency of vegetable dyes to cotton and other fibers is increased using an REM technique, such that organic denim and gabardine fabrics (or yarns) can be industrially manufactured in mass production. The method according to the present invention makes it possible to react vegetable dyes with cotton, vegetable or synthetic yarns under low heat, low solution concentration and reduced time parameters.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is the national phase entry of International Application No. PCT / TR2015 / 000279 filed on Aug. 5, 2015, which is based upon and claims priority to Turkish Patent Application No. 2014 / 09581 filed on Aug. 16, 2014 and Turkish Patent Application No. 2015 / 09108 filed on Jul. 23, 2015, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD[0002]The present invention relates to a method of dyeing denim yarns and fabrics with vegetable dyes. The present invention particularly relates to a method of dyeing denim yarns and fabrics with vegetable dyes in a continuous fashion such that the denim yarns and fabrics are obtained with natural and wider color options as well as with lower costs.BACKGROUND[0003]Nowadays, denim fabrics and denim jeans are widely used in many fields. In the garment industry in which denim fabrics and jeans are predominantly used, these are died to provide an improved appearance with...

AI Technical Summary

Benefits of technology

The present invention is a method for dyeing denim and gabardine fabrics using vegetable organic dyes on continuous or semi-continuous machines. The method improves the binding speed and efficiency of vegetable dyes to cotton and other fibers, allowing for the industrial manufacturing of organic denim and gabardine fabrics. The method requires low heat, low solution concentration, and reduced time parameters. The invention also provides techniques for designing novel, physically and chemically fast vegetable dye products that meet industry standards for quality and efficiency. Additionally, the invention improves the quality, efficiency, and costs of applying vegetable dyes, making them competitive against synthetic dyes, and allows for the design of healthy fabric products with natural color and odors.

Problems solved by technology

However, as the harmful effects of chemical dyestuffs on the health of humans and on the environment emerge day by day, alternative solutions are searched for dyeing denims.

As it is seen from the markets, however, this solution appears to be conducted in a quite primitive fashion.

This type of dyeing methods making use vegetable dyes went out of use in parallel with industrialization due to high costs, inadequate fastness, lack of compatibility with cotton, slow reaction times, etc.

Currently-available vegetable dyeing approaches fail to provide products, which are competitive and adequate in terms of costs and physical properties (particularly fastness), as well as methods by which mass production can be performed.

Current dyeing methods using vegetable dyes are disadvantageous in terms of the dyeing costs, which are many tunes higher than the costs of those methods using cotton and chemical dyes, the matte and dull colors, limited color options, the lack of the indigo character as a result of wearing and washing, inadequate fastness to lemon and carbonate (the highest fastness degree is 5 and the lowest fastness degree is 1), and the resulting product.

These methods are also not competitive with dyeing methods using synthetic dyes due to easy soiling or staining as a result of matte and dull colors and inadequate fastness to lemon and carbonate.

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