CN102561056B

CN102561056B - Dyeing process for denim without sewage discharge

Info

Publication number: CN102561056B
Application number: CN201010608560.7A
Authority: CN
Inventors: 孙国祥; 李林学; 李杰钊
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-28
Filing date: 2010-12-28
Publication date: 2014-07-30
Anticipated expiration: 2030-12-28
Also published as: CN102561056A

Abstract

本发明属于布匹染色的技术领域，尤其是一种牛仔布无污水排放染色工艺；本发明主要是将靛蓝、生物还原剂、扩散剂和水进行调配制得染料，结合对纱线湿度和染色过程温度的控制，最后制得用靛蓝染色了的牛仔布纱线，牛仔布纱线再进行纺织制得牛仔布产品；本发明较传统工艺，节约了多次重复的染色-氧化工序，尤其是，染色后的纱线不需要用大量的水冲洗，不仅节约了大量的能源，同时大大降低了污水对环境的破坏，具有显著的社会效益和经济效益。The invention belongs to the technical field of cloth dyeing, in particular to a dyeing process for denim without sewage discharge; the invention mainly prepares dyes by mixing indigo, a biological reducing agent, a diffusing agent and water, and finally prepares denim yarn dyed with indigo in combination with the control of yarn humidity and temperature during the dyeing process, and the denim yarn is then woven to obtain a denim product; compared with the traditional process, the invention saves multiple repeated dyeing-oxidation processes, in particular, the dyed yarn does not need to be washed with a large amount of water, which not only saves a large amount of energy, but also greatly reduces the damage of sewage to the environment, and has significant social and economic benefits.

Description

A kind of dyeing technology without sewage discharging for jean

Technical field

The invention belongs to piece dyeing technical field, especially a kind of dyeing technology without sewage discharging for jean.

Technical background

Cowboy's dress ornament finally develops into fashionable dress by military uniform, and the style that is full of youthful vigor develops into eternal fashionable dress, represent modern and pursued freedom, enjoy unfettered life style, and built happy demand in the allegro city life of anxiety.Jean experience more than 150 years is always popular, lasting.At present jean and become one of important Export Textiles of China, also be one of main pillar of national extra earning simultaneously, for national extra earning a large amount of foreign exchanges, and a large amount of labor problems are solved, but, the denim of outlet is all taking low-and-medium-grade products as main, and is mostly using cheap price as the Main Means of competing; The developed countries such as international anti-dumping trade friction is constantly upgraded, American-European have formulated multiple " textiles ecological series standard " especially, arrange in " green fort ", obstruct the outlet of our textiles.

Manufacturing denim conventional raw material is Quality Pure Cotton Yarn Production, requires the specific style that reaches according to denim, is all generally indigo dyeing of employing, and the operation of dyeing comprises: kiering-dyeing-oxidation-wash water-oven dry; Wherein: kiering needs 1～3 time repeatedly, dyeing-oxidation needs 6～18 times repeatedly, and washing needs 2～3 times repeatedly.

Painted in order to make indigo can reacting with yarn fiber, must reduce indigo.Conventional method of reducing is to reduce indigo with caustic soda (NaOH) and sodium hydrosulfite (sodium thiosulfate), then will enter in air with indigo yarn, reacts and forms color with airborne oxygen.In this oxidation-reduction process, can produce a large amount of electrolyte and loose colour, in the time that dyeing completes, must these electrolyte and loose colour be rinsed out with a large amount of clear water, can produce so a large amount of sewage, can not adapt to requirement and competitiveness to environmental issue.

Summary of the invention

The invention provides a kind of without sewage discharge dyeing, the method not only technique is simple, and energy consumption is low, especially can reach the production of without sewage discharge.

To achieve the above object, technical scheme of the present invention is:

A kind of dyeing technology without sewage discharging for jean, comprises and is prepared as follows step:

Steps A, allotment dyestuff:

First indigo raw material and biological reductant are mixed at normal temperatures according to weight ratio 1: 1～1.5, make indigo mixture;

Count by weight percentage, 0.01%～1% indigo mixture, 0.5%～1.5% diffusant and water are mixed; Making dyestuff is transferred in dye vat for subsequent use;

Step B, yarn is dried with drying cylinder, its moisture content is reached below 10%; In described drying cylinder with 110 DEG C～140 DEG C steam as thermal source;

Step C, the yarn of drying in step B is dyeed through dye vat;

Step D, gained in step C is dyed and has the yarn of indigo to walk around roll, the yarn of dyeing is exposed in air, utilize air to carry out oxidative cure to the indigo on yarn;

Step e, the yarn being oxidized in step D is dried with drying cylinder;

Step F, repeating step C～E2～3 time, make the finished product cowboy yarn having dyed, and cowboy's yarn obtains denim finished product through braiding.

Preferably, in described steps A, diffusant is made up of the 20%～30%NNO diffusant counting by weight percentage and 70%～80% sodium lignin sulfonate.

The present invention allocates indigo, biological reductant, diffusant and water to make dyestuff, in conjunction with the control to yarn humidity and dyeing course temperature, finally make with indigo dyeing denim yarn, denim yarn is weaved and is made denim product; The present invention, compared with traditional handicraft, has saved repeated dyeing-oxidation operation, especially, yarn after dyeing does not need to rinse with a large amount of water, not only save a large amount of energy, greatly reduced the destruction of sewage to environment simultaneously, there is significant Social benefit and economic benefit.Advantage of the present invention:

1), compared with traditional production technology, shortened the time of dyeing-oxidation, the present invention only needs the Quick Oxidation equipment of short liquor ratio;

2), without sewage produce, be conducive to enhancement of environment;

3), electricity consumption use gas is few, saves the energy;

4), equipment is simple, takes up an area less, equipment investment is few and be conducive to management;

5), can realize high-temp dyeing, can imbue the yarn heart, be conducive to develop new denim product;

6), yarn consume is few.

Concrete embodiment

For a better understanding of the present invention, below in conjunction with embodiment, the present invention will be described in detail.

Embodiment 1

Steps A, allotment dyestuff:

First indigo raw material and biological reductant are at normal temperatures mixed according to weight ratio at 1: 1, make indigo mixture;

Count by weight percentage, 0.01% indigo mixture, 0.5% diffusant and water are mixed; Making dyestuff is transferred in dye vat for subsequent use;

Step B, yarn is dried with drying cylinder, its moisture content is reached below 10%; In described drying cylinder with 110 DEG C of steam as thermal source;

Step C, the yarn of drying in step B is dyeed through dye vat;

Step e, the yarn being oxidized in step D is dried with drying cylinder;

Step F, repeating step C～step e 2 times, make the finished product cowboy yarn having dyed, and cowboy's yarn obtains denim finished product through braiding.

Preferably, in described steps A, diffusant is made up of the 20%NNO diffusant counting by weight percentage and 70% sodium lignin sulfonate.

Embodiment 2

Steps A, allotment dyestuff:

First indigo raw material and biological reductant are at normal temperatures mixed according to weight ratio at 1: 1.1, make indigo mixture;

Count by weight percentage, 0.05% indigo mixture, 0.7% diffusant and water are mixed; Making dyestuff is transferred in dye vat for subsequent use;

Step B, yarn is dried with drying cylinder, its moisture content is reached below 10%; In described drying cylinder with 115 DEG C of steam as thermal source;

Step C, the yarn of drying in step B is dyeed through dye vat;

Step e, the yarn being oxidized in step D is dried with drying cylinder;

Step F, repeating step C～step e 3 times, make the finished product cowboy yarn having dyed, and cowboy's yarn obtains denim finished product through braiding.

Preferably, in described steps A, diffusant is made up of the 22%NNO diffusant counting by weight percentage and 78% sodium lignin sulfonate.

Embodiment 3

Steps A, allotment dyestuff:

First indigo raw material and biological reductant are at normal temperatures mixed according to weight ratio at 1: 1.3, make indigo mixture;

Count by weight percentage, 0.1% indigo mixture, 0.8% diffusant and water are mixed; Making dyestuff is transferred in dye vat for subsequent use;

Step B, yarn is dried with drying cylinder, its moisture content is reached below 10%; In described drying cylinder with 120 DEG C of steam as thermal source;

Step C, the yarn of drying in step B is dyeed through dye vat;

Step e, the yarn being oxidized in step D is dried with drying cylinder;

Preferably, in described steps A, diffusant is made up of the 26%NNO diffusant counting by weight percentage and 74% sodium lignin sulfonate.

Embodiment 4

Steps A, allotment dyestuff:

First indigo raw material and biological reductant are at normal temperatures mixed according to weight ratio at 1: 1.4, make indigo mixture;

Count by weight percentage, 0.5% indigo mixture, 0.9% diffusant and water are mixed; Making dyestuff is transferred in dye vat for subsequent use;

Step B, yarn is dried with drying cylinder, its moisture content is reached below 10%; In described drying cylinder with 130 DEG C of steam as thermal source;

Step C, the yarn of drying in step B is dyeed through dye vat;

Step e, the yarn being oxidized in step D is dried with drying cylinder;

Preferably, in described steps A, diffusant is made up of the 28%NNO diffusant counting by weight percentage and 72% sodium lignin sulfonate.

Embodiment 5

Steps A, allotment dyestuff:

First indigo raw material and biological reductant are at normal temperatures mixed according to weight ratio at 1: 1.5, make indigo mixture;

Count by weight percentage, 1% indigo mixture, 1.5% diffusant and water are mixed; Making dyestuff is transferred in dye vat for subsequent use;

Step B, yarn is dried with drying cylinder, its moisture content is reached below 10%; In described drying cylinder with 140 DEG C of steam as thermal source;

Step C, the yarn of drying in step B is dyeed through dye vat;

Step e, the yarn being oxidized in step D is dried with drying cylinder;

Preferably, in described steps A, diffusant is made up of the 30%NNO diffusant counting by weight percentage and 80% sodium lignin sulfonate.

Process comparative analysis:

As can be seen from the above table, denim manufacturing technique adopts the present invention, and the energy cost that every myriametre consumes is saved 3726 yuan than traditional handicraft, and to calculate in certain enterprise practical production capacity 3000 myriametre/year, reach saving energy cost at 1117.8 ten thousand yuan the whole year.

Have data to show, China's annual denim production in 2009 exceedes 2,500,000,000 meters, calculates approximately 2,400 ten thousand tons of quantity of wastewater effluent in China's denim dyeing production processes in 2009, approximately 4,250,000 tons of steam consumptions, power consumption approximately 11,275 ten thousand degree by these data; If employing the present invention, even if only calculate by promoting 50, China can reduce 2,400 ten thousand tons of wastewater discharges the whole year, total save electric weight approximately 8,450 ten thousand degree, reduces approximately 2,750,000 tons of steam consumptions, amounts to approximately 93,150 ten thousand yuan of the amount of money.

Above-described embodiment, is preferred embodiment of the present invention, is not used for limiting the scope of the present invention, and the equivalence of being done with the feature described in the claims in the present invention and principle therefore all changes or modifies, within all should being included in the claims in the present invention scope.

Claims

1. a denim dyeing process without sewage discharge, is characterized in that, comprises following preparation steps:

Step A, deploying dyes:

First, the indigo raw material and the biological reducing agent are mixed uniformly at room temperature according to the weight ratio of 1:1 to 1.5 to prepare the indigo mixture;

Calculated by weight percentage, mix 0.01% to 1% of indigo mixture, 0.5% to 1.5% of diffusing agent and water; transfer the prepared dye to a dye vat for standby;

Step B, drying the yarn with a drying cylinder to make the moisture content below 10%; using steam at 110°C to 140°C as a heat source in the drying cylinder;

Step C, dyeing the yarn dried in step B through a dyeing vat;

Step D, passing the indigo-dyed yarn obtained in step C over the rollers, exposing the dyed yarn to the air, and utilizing the air to oxidize and solidify the indigo on the yarn;

Step E, drying the oxidized yarn in step D with a drying cylinder;

Step F, repeating steps C to E 2 to 3 times to obtain a finished dyed denim yarn, and the denim yarn is woven to obtain a denim finished product;

The diffusing agent in the step A is composed of 20%-30% NNO diffusing agent and 70%-80% sodium lignosulfonate calculated by weight percentage.