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Dyeing method for uniformly dyeing leather
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A technology of uniform dyeing and dyeing method, applied in the field of leather dyeing
Inactive Publication Date: 2020-10-20
浙江晶腾新材料股份有限公司
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Problems solved by technology
[0004] This invention application has the advantages of improving the production efficiency of leather dyeing and reducing the environmental pollution of the leather dyeing process, but it still does not solve the above problems
Method used
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Embodiment 1
[0031] The present embodiment provides a kind of dyeing method of uniform dyeing of leather, as figure 1 shown, including the following steps:
[0032] Step 1: 10 parts by mass of dyes, the dyes can be selected from commercially available dyes, 10 parts of acrylic acid, 15 parts of titanium dioxide, 8 parts of dibutyltin dilaurate, 6 parts of silicone oil, 12 parts Cholesteryl sulfatesodium salt, 5 parts of sodiumligninsulfonate and 2 parts of trimethylolpropane are mixed with water, stirred evenly and become a paste, then added water and stirred evenly to obtain a dyeing solution;
[0033] Step 2: Add the leather to be dyed into the dyeing mechanism 100, then add the dyeing solution prepared in step 1 into the dyeing mechanism 100, raise the temperature of the dyeing solution to 35°C, and drive the dyeing mechanism 100 to rotate and dye for 2 hours;
[0034] Step 3: heat up to 55°C, drive the dyeing mechanism 100 to rotate for 15 minutes, and obtain evenly dyed leather. ...
Embodiment 2
[0046] This embodiment provides a dyeing method for uniform dyeing of leather, combining Figure 1-4 shown, including the following steps:
[0048] Step 2: Add the leather to be dyed into the dyeing mechanism 100, then add the dyeing solution prepared in step 1 into the dyeing mechanism 100, raise the temperature of the dyeing solution to 30°C, and drive the dyeing mechanism 100 to rotate and dye for 1 hour;
[0049] Step 3: heat up to 50°C, drive the dyeing mechanism 100 to rotate for 10 minutes, and obtain evenly dyed leather.
[0050] The specific structure of the dyeing mechanism 100 is exactly the same as that in E...
Embodiment 3
[0052] This embodiment provides a dyeing method for uniform dyeing of leather, combining Figure 1-4 shown, including the following steps:
[0054] Step 2: Add the leather to be dyed into the dyeing mechanism 100, then add the dyeing solution prepared in step 1 into the dyeing mechanism 100, raise the temperature of the dyeing solution to 32°C, and drive the dyeing mechanism 100 to rotate and dye for 1.5 hours;
[0055] Step 3: raise the temperature to 52°C, drive the dyeing mechanism 100 to rotate for 13 minutes, and obtain evenly dyed leather.
[0056] The specif...
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Abstract
The invention belongs to the technical field of leather dyeing, and particularly relates to a dyeing method for uniformly dyeing leather. The problem that in the prior art, the dyeing uniformity of leather is not ideal enough is solved. The invention provides the dyeing method for uniformly dyeing the leather. The dyeing method comprises the following steps that a dyeing agent and an auxiliary dyeing agent are mixed with water, uniform stirring is carried out to form paste, water is added, uniform stirring is carried out to obtain a dyeing solution; a leather to be dyed is added into a dyeingmechanism, then the dyeing liquid is added into the dyeing mechanism, the dyeing liquid is heated to 30-35 DEG C, the dyeing mechanism is driven to rotate for dyeing for 1-2 h; and and the temperatureis increased to 50-55 DEG C, the dyeing mechanism is driven to rotate for dyeing within 15 min, and the uniformly dyed leather is obtained. According to the dyeing method for uniformly dyeing the leather, the auxiliary dyeing agent is attached to the surface of the leather at low temperature to hinder dyeing of the surface of the leather, the dyeing agent permeates into the leather to achieve thorough dyeing at the moment, the auxiliary dyeing agent is separated from the surface of the leather at high temperature, leather surface dyeing is achieved through the dyeing agent at the moment, andtherefore it is guaranteed that the surface, inside and outside of the leather have good dyeing uniformity.
Description
technical field [0001] The invention belongs to the technical field of leather dyeing, in particular to a dyeing method for evenly dyeing leather. Background technique [0002] Leather dyeing is a complex physical and chemical process, which is the process of penetration and bonding of dye molecules to leather fibers, and is the total effect of physical and chemical effects. During the whole dyeing process, adsorption, diffusion, penetration and fixation interact and alternate with each other. The leather dyeing process involves a wide range of factors, and there are many influencing factors, which can be mainly divided into factors such as equipment, dyeing materials, technology and operation. But the dyeing uniformity of the leather dyed by the leather dyeing method used in the prior art is not ideal enough. [0003] For example, a Chinese invention patent application discloses a waterless dyeing method for leather [application number: 201710390344.1]. The invention pate...
Claims
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Application Information
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