Preparation of indigo-dyed cotton denim fabrics and garments

A fabric and twill technology, applied in the field of preparation of indigo-dyed cotton twill denim fabrics and clothing, can solve the problems of shortage of supply, existence of risks, etc.

Inactive Publication Date: 2014-03-12
CELANESE INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The approach was risky, leading to an inevit

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Embodiment Construction

[0018] The present invention relates to the preparation of indigo-dyed denim fabrics comprising knitted or woven cotton yarns. The treatment of the cotton yarns used (e.g. by pretreatment and / or indigo dyeing), the preparation of denim fabrics from the yarns and the post-treatment of the fabrics by dyeing or other operations are all described in detail below:

[0019] cotton yarn

[0020] Cotton yarn refers to double or multiple filaments made by twisting or joining cotton staple fibers together to make a cohesive thread. Of course, twisting fibers into yarn is a process called spinning.

[0021] Cotton staple fibers can be spun into yarns in single or multi-ply form. The cotton staple fibers forming such yarns are generally about 1.0 to about 3.0 denier per filament (dpf) and have a staple length of about 0.5 to 8.0 cm.

[0022] It is well known that cotton fibers can be combined with other fiber types when manufactured and used in yarn form. However, the best results in ...

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Abstract

Disclosed herein is the preparation of indigo-dyed cotton denim fabrics suitable for use in making cotton denim garments and other denim articles. These indigo-dyed fabrics are prepared from cotton warp yarn which has been pre-treated with an emulsion copolymer prior to being contacted with an aqueous dye liquor comprising a dispersion of an indigo dyestuff. Such copolymer-treated cotton warp yarn can be woven or knitted into cotton denim griege fabrics along with untreated cotton weft yarn. Such griege denim fabric can then be indigo-dyed using the aqueous dye liquor. Alternatively, the emulsion copolymer-treated cotton warp yarn can be indigo-dyed by contact with the aqueous dye liquor before this warp yarn is incorporated into denim fabric along with the untreated cotton weft yarn. The cotton denim fabric produced by either method has the appearance of conventional ring-dyed indigo fabrics. Such methods, however, can be carried out with greater control, precision, reproducibility and less waste than conventional ring dyeing operations.

Description

technical field [0001] This invention relates to the preparation of indigo-dyed cotton denim fabrics and garments. Such denim fabrics and garments have an uneven colored appearance. Background technique [0002] Denim garments are produced from the denim fabric. Denim fabric is generally a 3x1 twill knit structure in which the warp yarns are indigo dyed and the weft (or fill) yarns are undyed cotton. The imperial cotton count (Ne) of the yarn used to make denim is typically 7 / 1's. [0003] Denim's unique "salt and pepper" effect is created by mixing dyed warp yarns with undyed weft yarns. The weft is loaded on the loom to be hidden on the technical back of the fabric, thus making the inside of the jeans appear whiter. Due to the specific nature of the final product, the indigo-dyed yarn in denim must be dyed in yarn form, not as fabric. The yarn dyeing (for most denims) takes two forms. Bundle dyeing is the most common method. Slasher dyeing is used less frequently an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D06P1/22D06B11/00D06B19/00D06B21/00D06P3/60D06P5/12D06P1/52D06M15/333D06M15/356
CPCD06P7/00D06M15/333D06P5/12D06P1/22D06P3/6025D06M15/3562D06P1/5228D06P1/228Y10T442/20
Inventor H·斯库斯
Owner CELANESE INT CORP
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