CN101705627A - Leather dyeing method - Google Patents

Abstract

The invention relates to a leather dyeing method, which comprises the following steps: accurately weighing Deksol black B, Deksol orange R and Deksol red DS-B, fully grinding, mixing, and stirring evenly to obtain a dye composition; accurately weighing the dye composition, dissolving the dye composition with water, and shaking up to obtain dye solution; weighing leather, and soaking the leather with distilled water until the leather is fully drenched; and adding water and the leather into a dye vat, stirring for 5 to 10min, adding the dye solution, fully stirring, putting into an XW infrared sample dyeing machine, adding ethylic acid, starting up to raise temperature, making the temperature rise rate between 1 and 2DEG C/min, raising the temperature to between 50 and 60DEG C, preserving the heat for 30 to 50min, adding formic acid to dye 30 to 60min again, reducing the temperature to between 30 and 40DEG C, taking out, washing with movable water, and drying or naturally drying in the sun at the temperature lower than 50DEG C.

Description

A kind of leather dyeing method

Technical field

The invention belongs to the leather coloring field, particularly relate to a kind of leather dyeing method.

Background technology

The dyeing of leather and Related product thereof generally adopts ACID DYES, premetallized dye or mordant dyes to dye.With acid dyeing just by ionic bond dyeing, wet fastness be on duty mutually, pitch black degree is poor; It is very big to the infringement of leather material to dye with premetallized dye, and it is bigger to dye back cortex surface damage, and contains heavy metal ion in the molecular structure of dye; And mordant dyes need to add hexavalent chromium in dyeing course, and environmental pollution is very big, and dyeing is more complicated also, and the leather hand feeling after dying, brightness are all relatively poor.It is that the pitch black degree that has is poor that at present commercially available these dye the problem that exists in the dyestuff of leather, be not suitable for dying the leather top layer, have plenty of the heavy metal ion existence and be not suitable for environmental protection, therefore be badly in need of having high pitch black degree of the feature of environmental protection and good leather dye and the colouring method thereof of fastness ability.

The invention provides that a kind of both compliance with environmental protection requirements have higher dye uptake, pitch black degree height again, every fastness ability is good, dyeing is simple and to the little dye composite and the dyeing of leather infringement of protein material, overcome traditional ACID DYES, premetallized dye pitch black degree behind the leather coloring of dsred protein material and look into problems such as containing heavy metal in poor, the fastness difference that wets or the dye structure.

Summary of the invention

For solving the problems of the technologies described above, the invention provides a kind of leather dyeing method, this method comprises the steps:

(1) accurately take by weighing the plain red DS-B of the triumphant element of moral black B, the orange R of the triumphant element of moral and De Kai and fully pulverize, mix then, stir, obtain dye composite,

(2) accurately take by weighing dye composite, use water-soluble, shake up dye solution.

(3) take by weighing leather, fully be dipped to fully drenched with distilled water;

(4) dye vat is added entry, leather, add dye solution after stirring 5-10min, put into the XW infrared ray after fully stirring and dye model machine, begin to heat up behind the adding acetic acid, heating rate 1-2 ℃/min, be warming up to 50-60 ℃, insulation 30-50min adds formic acid then and dyes 30-60min again, be cooled to 30-40 ℃ then, take the dish out of the pot, clean, be lower than under 50 ℃ the temperature oven dry or drying naturally then with circulating water.

In the said method, leather is preferably ox-hide.

In the said method, the weight ratio that the triumphant element of moral is deceived B, the orange R of the triumphant element of moral and the plain red DS-B of De Kai is 50-90: 5-40: 5-30, and preferred weight ratio is 60-80: 10-20: 5-15.

In the said method, preferably the concentration of dye solution is 0.01g/ml.

In the said method, preferred acetic acid and formic acid are that mass concentration is 2% the aqueous solution.

In the said method, acetic acid solution that adds in the dyeing course and formic acid solution respectively account for the 2-10% of staining solution cumulative volume, and preferred acetic acid solution accounts for 5%, and formic acid solution accounts for 5% and 10%.The 30-50% that dye solution accounts for the staining solution cumulative volume regulates according to dye level, and when for example dye level was 3%, the bulk specific gravity that adds dye solution was 30%, and when dye level was 5%, the bulk specific gravity that adds dye solution was 50%.

Preferably, leather dyeing method of the present invention comprises the steps:

(1) accurately takes by weighing 7.5 Ke Dekai plain orange R of plain black B, 1.5 Ke Dekai and the plain red DS-B of 1.0 Ke Dekai and fully pulverize, mix then, stir, obtain dye composite;

(2) take by weighing 2.500 grams from the dye composite for preparing and place the 100mL beaker respectively, use water-soluble, move in the 250mL volumetric flask, water is cleaned beaker on a small quantity repeatedly again, moves in the lump in the 250mL volumetric flask, and is diluted to scale, shakes up standby;

(3) taking by weighing ox-hide 10.00 grams fully is dipped to fully drenched with distilled water;

(4) dye vat is added water, the ox-hide of 60ml, add dye solution 30ml after stirring 5min, put into the XW infrared ray after fully stirring and dye model machine, add the 5ml mass concentration again and be 2% acetic acid, driving begins to heat up, heating rate 1-2 ℃/min, be warming up to 50-60 ℃, it is that 2% formic acid dyes 30min again that insulation 30min adds the 5ml mass concentration, be cooled to 40 ℃, take the dish out of the pot, clean, dry being lower than under 50 ℃ the temperature with circulating water.

It is to dye to protein material in acid dye bath that the present invention adopts the dyeing characteristics of leather special active black dyes, thereby the leather chemistry damage is minimum, and feel, the brute force of dying the back leather can not change, and it is high to dye the leather surface pitch black degree.

In addition, leather special active black dyes solubility height of the present invention, good level-dyeing property; Leather coloring dye uptake and lifting force to the protein material are all very high, the degree of depth of can dye 6% (w.o.f.).

The triumphant element of moral is deceived B, the orange R of the triumphant element of moral, the yellow 3RS of the triumphant element of moral, the red DS-B of the triumphant element of moral are the commercially available prod, can both buy the product that obtains from the market, can buy from Tianjin Dek Chemical Company Ltd. to obtain.

Dyeing of the present invention has been given full play to the performance of dye composite, makes dye composite realize perfectly more to the Color of leather.

The specific embodiment

For describing technical scheme of the present invention in detail, below illustrative example be elaborated, do not form any restriction to protection scope of the present invention.

The dye component of above-mentioned weight is fully pulverized, mixed then, stir, obtain dye composite.

Embodiment 1

Accurately taking by weighing 7.5 Ke Dekai plain orange R of plain black B, 1.5 Ke Dekai and the plain red DS-B of 1.0 Ke Dekai fully pulverizes, mix then, stir, obtain dye composite, from the dye composite for preparing, take by weighing 2.500 grams and place the 100mL beaker respectively, use water-soluble, move in the 250mL volumetric flask, water is cleaned beaker on a small quantity repeatedly again, moves in the lump in the 250mL volumetric flask, and be diluted to scale, shake up standby.

Taking by weighing ox-hide 10 grams (claiming accurate to 0.001 gram) fully is dipped to fully drenched with distilled water.

The water, the ox-hide that dye vat are added 60ml, add dye solution 30ml after stirring 5min, put into the XW infrared ray after fully stirring and dye model machine, add the 5ml mass concentration again and be 2% acetic acid, driving begins to heat up, heating rate 1-2 ℃/min, be warming up to 50-60 ℃, it is that 2% formic acid dyes 30min again that insulation 30min adds the 5ml mass concentration, be cooled to 40 ℃, take the dish out of the pot, clean, dry being lower than under 50 ℃ the temperature with circulating water.

The dyefastness of the ox-hide that embodiment 1 obtains is as follows:

Exposure to Sunlight	Sweat stain	Unlubricated friction	Wet rubbing
				??5-6	??4	??4-5	??4-5

Dye composite and dyeing that embodiments of the invention 1 adopt make that the dyefastness performance of leather coloring is good, have good pitch black degree and dense apparent intensity.

Colouring method of the present invention is described by specific embodiment.Those skilled in the art can use for reference links such as content appropriate change raw material of the present invention, process conditions and realize corresponding other purpose, its relevant change does not all break away from content of the present invention, all similar replacements and change will become apparent to those skilled in the art that and all be regarded as comprising within the scope of the present invention.

Claims (9)

1. leather dyeing method, this method comprises the steps:

(1) accurately take by weighing the plain red DS-B of the triumphant element of moral black B, the orange R of the triumphant element of moral and De Kai and fully pulverize, mix then, stir, obtain dye composite,

(2) accurately take by weighing dye composite, use water-soluble, shake up dye solution,

(3) take by weighing leather, fully be dipped to fully drenched with distilled water;

(4) dye vat is added entry, leather, add dye solution after stirring 5-10min, put into the XW infrared ray after fully stirring and dye model machine, begin to heat up behind the adding acetic acid, heating rate 1-2 ℃/min, be warming up to 50-60 ℃, insulation 30-50min adds formic acid then and dyes 30-60min again, be cooled to 30-40 ℃ then, take the dish out of the pot, clean, be lower than under 50 ℃ the temperature oven dry or drying naturally then with circulating water.

2. method according to claim 1, wherein leather is an ox-hide.

3. the weight ratio that method according to claim 1, its Sino-German triumphant element are deceived B, the orange R of the triumphant element of moral and the plain red DS-B of De Kai is 50-90: 5-40: 5-30, and preferred weight ratio is 60-80: 10-20: 5-15.

4. method according to claim 1, wherein the concentration of dye solution is 0.01g/ml.

5. according to each described method of claim 1, wherein acetic acid and formic acid are that mass concentration is 2% the aqueous solution.

6. according to each described method of claim 1-5, wherein acetic acid solution that adds in the dyeing course and formic acid solution respectively account for the 2-10% of staining solution cumulative volume, and preferred acetic acid solution accounts for 5%, and formic acid solution accounts for 5% and 10%.

7. according to each described method of claim 1-5, wherein dye solution accounts for the 30-50% of staining solution cumulative volume,

8. according to each described method of claim 1-5, when dye level was 3%, the bulk specific gravity that adds dye solution was 30%, and when dye level was 5%, the bulk specific gravity that adds dye solution was 50%.

9. leather dyeing method, this method comprises the steps:

(1) accurately takes by weighing 7.5 Ke Dekai plain orange R of plain black B, 1.5 Ke Dekai and the plain red DS-B of 1.0 Ke Dekai and fully pulverize, mix then, stir, obtain dye composite;

(2) take by weighing 2.500 grams from the dye composite for preparing and place the 100mL beaker respectively, use water-soluble, move in the 250mL volumetric flask, water is cleaned beaker on a small quantity repeatedly again, moves in the lump in the 250mL volumetric flask, and is diluted to scale, shakes up standby;

(3) taking by weighing ox-hide 10.00 grams fully is dipped to fully drenched with distilled water;

(4) dye vat is added water, the ox-hide of 60ml, add dye solution 30ml after stirring 5min, put into the XW infrared ray after fully stirring and dye model machine, add the 5ml mass concentration again and be 2% acetic acid, driving begins to heat up, heating rate 1-2 ℃/min, be warming up to 50-60 ℃, it is that 2% formic acid dyes 30min again that insulation 30min adds the 5ml mass concentration, be cooled to 40 ℃, take the dish out of the pot, clean, dry being lower than under 50 ℃ the temperature with circulating water.