KR102400011B1 - Eco-friendly manufacturing method of natural leather using vegetable natural dyes - Google Patents

Abstract

An eco-friendly manufacturing method for natural leather using natural plant dyes according to the present invention comprises: a washing step for washing natural leather; a dyeing step for injecting, into the natural leather, a first material group comprising plant components, a second material group comprising a polymer, and natural plant dyes; and a fatliquoring step for imparting flexibility to the natural leather by injecting a third material group comprising an oil-based fatliquoring agent into the natural leather.

Description

Eco-friendly manufacturing method of natural leather using vegetable natural dyes

The present invention relates to a method for producing natural leather using a vegetable natural dye, and by producing natural leather having a specific color using a natural dye during the dyeing process of natural leather, a color superior to natural leather dyed with a synthetic dye and It relates to a method for producing an eco-friendly natural leather with a beautiful color and harmless to the human body due to the dyeing amount characteristic.

Wastewater generated in the leather dyeing process using synthetic dyes is causing serious environmental problems, and regulations are also being made on this as each country's interest in environmental problems increases.

In addition, synthetic dyes used for dyeing natural leather are known to have a large impact on human health in addition to environmental problems, such as causing side effects on the body.

Therefore, in order to prevent the above problems, the demand for an eco-friendly and harmless natural leather manufacturing method is gradually increasing.

Republic of Korea Patent Publication No. 10-1071337

The present invention is an invention devised to solve the problems of the prior art, and is intended to provide a method for manufacturing natural leather having a specific color using a natural vegetable dye.

In addition, it is to provide a natural leather prepared by a method for producing natural leather using a natural vegetable dye.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

A method for producing natural leather using a vegetable natural dye of the present invention for achieving the above object is a washing process for washing the natural leather, a first group of materials containing a plant component in the natural leather, and a second containing a polymer It may include a dyeing process of adding a substance group and a vegetable natural dye, and a branching process of giving flexibility to the natural leather by adding a third substance group including an oily fatliquoring agent to the natural leather.

In this case, the method may further include a pretreatment step of adjusting the PH of the natural leather by adding at least one of an iron remover, an eggplant aid, and a neutralization aid to the natural leather washed through the washing process.

Alternatively, in order to improve the color saturation of the natural leather, it may further include a top process of performing surface dyeing by injecting the powder of the vegetable natural dye into the natural leather that has undergone the eggplant process.

Alternatively, it may further include a mordant process of fixing the third material group by adding formic acid to the natural leather that has undergone the branching process.

Alternatively, the method may further include a deodorizing step of deodorizing the natural leather by adding a deodorant or iron remover to the natural leather that has undergone the branching process.

Alternatively, the first material group may include at least one of gambier, mimosa, and tara.

Alternatively, the vegetable natural dye may be characterized in that buckwheat, henna, indigo or mirobaran.

Alternatively, the third substance group may include oil extracted from at least one of olive, soybean, and corn.

And the natural leather of the present invention for achieving the above object can be manufactured by the method for producing natural leather using the vegetable natural dye described above.

The method for producing natural leather using a natural dye of the present invention for solving the above problems and the natural leather prepared therefrom have the following effects.

First, it is eco-friendly because no environmental pollution occurs during the dyeing process by dyeing natural leather using natural dyes, that is, natural dyes that are harmless to the human body.

Second, since replacement of the bath required for the conventional dyeing process is unnecessary, the dyeing time can be remarkably reduced and productivity improvement can be expected.

Third, the natural leather manufactured according to the present invention can obtain high-quality natural leather by minimizing the wound on the surface.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a flowchart of an eco-friendly manufacturing method of natural leather using a vegetable natural dye of the present invention.

Hereinafter, preferred embodiments of the present invention in which the object of the present invention can be specifically realized will be described with reference to the accompanying drawings. In describing the present embodiment, the same names and the same reference numerals are used for the same components, and an additional description thereof will be omitted.

In addition, in describing the embodiment of the present invention, the same names and reference numerals are used for components having the same function, and it is substantially not completely the same as in the prior art.

In addition, terms used in the embodiments of the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In addition, in the embodiments of the present invention, terms such as "comprises" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one It should be understood that it does not preclude the possibility of the presence or addition of or more other features or numbers, steps, operations, components, parts, or combinations thereof.

An eco-friendly manufacturing method of natural leather using a vegetable natural dye of the present invention will be described with reference to FIG. 1 , which is a flowchart of an eco-friendly manufacturing method of natural leather using a vegetable natural dye of the present invention.

The eco-friendly manufacturing method of natural leather using a vegetable natural dye of the present invention may include a washing process (S100), a dyeing process (S300) and a branching process (S400).

The washing process (S100) is a process of removing animal fat or contaminants remaining in the wet white state before dyeing, and water and detergent may be added thereto.

Specifically, the washing process may be performed at a temperature of 40° C. for 30 minutes using 300 wt% of water and 0.5 wt% of a detergent based on the total weight of the natural leather. In this case, the detergent is preferably an eco-friendly detergent using, for example, grape skins, but is not limited thereto.

After the washing process, a first washing process of washing again after pouring the water may be performed.

The dyeing process (S300) is a process of providing flexibility to the natural leather, neutralizing and dyeing, and a first material group containing plant components in the natural leather, a second material group containing a polymer, and a vegetable natural dye. It may be an input process.

In this case, the first material group may include at least one of gambier, mimosa, and tara. The first material group is an eco-friendly material, vegetable (vegetable), which can give a feeling of filling to the natural leather. Specifically, gambier, mimosa and tara are preferably added at 6wt% based on the total weight of the natural leather. .

The second material group may include X-BIOMER P or X-BIOMER RX. The X-BIOMER P can be given elasticity to natural leather by using corn extract, and 2wt% can be added based on the total weight of the natural leather. The X-BIOMER RX uses a by-product of natural leather and can give a feeling of filling of natural leather, and it is preferable that 2wt% is added based on the total weight of the natural leather.

In addition, in the dyeing process, an eggplant agent and a mordant auxiliary agent may be added.

The fatliquoring agent is a material capable of imparting flexibility to the inside of the leather and may include SPE, and it is preferable that 1wt% is added based on the total weight of the natural leather.

The mordant auxiliary agent may be used as a syntan to help the penetration of the mordant of the natural leather and the material input to the dyeing process. The mordant auxiliary agent may include A-CALF, and it is preferable that 2wt% is added based on the total weight of the natural leather.

The vegetable natural dye is for developing leather in a specific color, and may be characterized in that it is buckwheat, henna, indigo or mirobaran.

In the conventional case, natural leather dyeing technique involves adding water after the dyeing process, fixing formic acid and waxing (washing), but in the present invention, by performing the branching process without exchanging the bath after the dyeing process, conventional It is possible to remarkably reduce the amount of water used compared to that, and realize the effect of reducing the amount of wastewater generated accordingly.

At this time, by adding at least one of an iron remover, an eggplant aid, and a neutralization aid to the natural leather washed through the washing process between the washing process (S100) and the dyeing process (S300) to adjust the PH of the natural leather A pretreatment process (S200) may be performed.

The iron remover is to precipitate metals of water in the dyeing drum, and may include ethylene diamine tetraacetic acid (EDTA). The eggplant auxiliary agent serves to supplement the softness of the natural leather before the dyeing process, and may include GLN. In addition, the neutralization adjuvant functions as a neutralizing syntan (synthetic tannin) that adjusts the pH before dyeing, and may include T-NE.

Specifically, in the pretreatment process, first, 30wt% of water, 0.1wt% of EDTA, and 0.5wt% of GLN were added with respect to the total weight of the natural leather, and the process was performed at 25°C for 20 minutes, and then, 2wt% of synthetic tannin was added. It is preferable to input and perform the process for 40 minutes at the same temperature.

In the eggplant process (S400), a third material group including an oily fatliquoring agent may be added to the natural leather to impart flexibility to the natural leather.

In this case, the third substance group may include oil extracted from at least one of olive, soybean, and corn. It is preferable that the oil extracted from olives be added at 3 wt% based on the total weight of the natural leather, and the oil extracted from soybeans or corn is preferably added at 2 wt% based on the total weight of the natural leather.

In addition, the branching process may include a copolymer that imparts elasticity and firmness (TIGHTNESS) to the leather, and 2wt% is preferably added based on the total weight of the natural leather.

Specifically, in the eggplanting process, 100wt% of water is added with respect to the total weight of the natural leather, the process is performed at a temperature of 55°C for 10 minutes, and the copolymer is processed for 20 minutes at the same temperature, and then the third It is preferable to carry out the process for 90 minutes at the same temperature by introducing a group of substances.

When performing the eggplant process, since the dye adsorption rate of the vegetable natural dye is maximized by performing the process without replacing the bath in the dyeing process, the process yield can be remarkably increased.

In addition, the effect of penetration and bonding can be maximized by performing the overnight process with 1 cycle of drum rotation for 10 minutes and drum stop for 50 minutes between the dyeing process and the branching process in 8 to 12 cycles. there is.

Comparing the results before and after (10 cycles) of performing the overnight process as shown in [Table 1] below, it can be confirmed that by performing the overnight process, the leather has more filling and the ocher color is sufficiently penetrated into the cross section. can [Table 1] below, it is obvious to those skilled in the art that the same or similar results will be obtained through the process using loess rather than vegetable dyes.

Before overnight process After overnight process

At this time, in the eco-friendly manufacturing method of natural leather using the vegetable natural dye of the present invention, the top process (S500), the mordant process (S600) and the deodorization process (S700) may be sequentially performed after the eggplant process.

In the top step (S500), in order to improve the color saturation of the natural leather, the surface dyeing may be performed by injecting the above-described vegetable natural dye powder into the natural leather that has undergone the eggplanting process.

Specifically, the top process may be to perform the process for 20 minutes at a temperature of 55 ℃ by adding 1wt% to 2wt% of the vegetable natural dye used in the dyeing process with respect to the total weight of the natural leather. At this time, when using coarse particles, the vegetable natural dye may cause scratches on the surface of natural leather, thereby lowering commercial properties, so it is preferable to use a finely powdered dye.

In the mordant process (S600), formic acid may be added to the natural leather that has undergone the branching process to fix the third material group.

Specifically, the mordant process may be to perform the process for 50 minutes at a temperature of 55 ℃ by adding 1wt% of formic acid based on the total weight of the natural leather.

And, in the deodorization process (S700), a deodorant or iron remover is added to the natural leather that has undergone the branching process to deodorize the natural leather, that is, it is possible to remove odors such as odors from natural leather.

In the deodorization process, an organic acid deodorizing agent for alleviating the smell of natural leather or an iron removing agent capable of removing iron remaining in natural leather and adjusting pH may be added.

Specifically, the deodorization process may be to perform the process for 30 minutes at a temperature of 25 ℃ by adding 300wt% of water, 1wt% of a deodorant and 0.3wt% of an iron remover based on the total weight of the natural leather.

In addition, the present invention provides a natural leather having a natural dye color manufactured by the above manufacturing method.

Hereinafter, the present invention will be described in more detail by way of Examples. However, these examples are only for helping the understanding of the present invention, and the scope of the present invention is not limited thereto in any sense.

(Example 1)

According to the method for producing natural leather using the vegetable natural dye of the present invention described above, natural leather having a specific color was prepared by using the processes and materials described in Table 2 below.

fair substance name Weight (wt)% Temperature (℃) hours (minutes) washing process water 300 40 30 PROSOAK 0.5 wash - - - 10 pretreatment process water 30 25 20 EDTA 0.1 GLN 0.5 T-NE 2 40 Dyeing process GAMBIER 6 25 40 MIMOS 6 TARA 6 X-BIOMER P 2 X-BIOMER RX 2 SPE One A-CALF 2 180 vegetable natural dye 4 to 8 Overnight process 1 cycle (60 minutes) = drum rotation (10 minutes) + drum stop (50 minutes)
8 to 12 cycles branching process water 100 55 10 PMB 2 20 OLV 3 90 NLM 2 CFS 2 ELV-A01 2 saw process Plant natural dye powder 1 to 2 55 20 mordant process formic acid One 55 50 wash - - - 10 deodorization process water 300 25 30 DIOSOL One fisheries 0.3

In the dyeing process, the first material group and the second material group were added, and the drum process was performed at a temperature of 25° C. for 40 minutes, and then, 4wt% of a vegetable natural dye was added based on the total weight of the mordant auxiliary and natural leather. The drum process was performed at 25 ° C. for 180 minutes, and in the top process, 2 wt % of vegetable natural dye powder was added based on the total weight of natural leather, and the process was performed at 55 ° C. for 20 minutes as shown in [Table 3] below. Beautifully colored natural leather was prepared according to each vegetable natural dye.

usage buckwheat henna indigo blue labyrinth Dyeing process 8wt%+
Saw process 2wt%

(Example 2)

In the dyeing process, the first material group and the second material group were added, and the drum process was performed at a temperature of 25° C. for 40 minutes, and then, 8wt% of a vegetable natural dye was added based on the total weight of the mordant auxiliary and natural leather. The drum process was performed at a temperature of 25° C. for 180 minutes, and 2wt% of a vegetable natural dye powder was added based on the total weight of the natural leather in the top process, and the process was performed at a temperature of 55° C. for 20 minutes to prepare natural leather.

(Comparative Example 1)

In the dyeing process, the first material group and the second material group were added, and the drum process was performed at a temperature of 25° C. for 40 minutes, and then, 4wt% of a vegetable natural dye was added based on the total weight of the mordant auxiliary and natural leather. The drum process was performed at a temperature of 25° C. for 180 minutes to prepare natural leather.

(Comparative Example 2)

In the dyeing process, the first material group and the second material group were added, and the drum process was performed at a temperature of 25° C. for 40 minutes, and then, 10wt% of a vegetable natural dye was added based on the total weight of the mordant auxiliary and natural leather. The drum process was performed at a temperature of 25° C. for 180 minutes, and 2wt% of a vegetable natural dye powder was added based on the total weight of the natural leather in the top process, and the process was performed at a temperature of 55° C. for 20 minutes to prepare natural leather.

The values comparing the softness of the leather according to the preparation examples of Examples 1 and 2 and Comparative Examples 1 and 2 are as shown in [Table 4].

division Comparative Example 1 Example 1 Example 2 Comparative Example 2 usage 4 wt% 6 wt% 10 wt% 12 wt% softness(M/M) 2.7~3.2 2.5~3.0 2.1~2.5 1.9~2.3

The softness in the table above is the strength value of leather measured in accordance with EN ISO 17235 with MSA ST300 certified by BLC, and the strength may vary depending on the amount (wt%) of total vegetable natural dyes used in the dyeing process and the sawing process.

At this time, the strength of the leather is preferably between 2.5 and 3.0. When the strength of the leather is less than 2.5, the feeling of filling in the leather is relatively small, and when the strength of the leather is greater than 3.0, the strength of the leather is too strong, making it difficult to manufacture future products and economically disadvantageous.

As described above, preferred embodiments according to the present invention have been reviewed, and the fact that the present invention can be embodied in other specific forms without departing from the spirit or scope of the present invention in addition to the above-described embodiments is one of ordinary skill in the art. It is obvious to them. Therefore, the above-described embodiments are to be regarded as illustrative rather than restrictive, and accordingly, the present invention is not limited to the above description, but may be modified within the scope of the appended claims and their equivalents.

S100: cleaning process
S200: pretreatment process
S300: Dyeing process
S400: eggplant process
S500: saw process
S600: mordant process
S700: deodorization process

Claims (9)

A washing process for washing natural leather;
A pretreatment process of adjusting the pH of the natural leather by adding ethylene diamine tetraacetic acid (EDTA), an eggplant aid and a neutralization aid to the natural leather washed through the washing process;
a dyeing process of adding a first material group including a plant component, a second material group including a polymer, a natural vegetable dye and a mordant auxiliary to the natural leather;
a branching process of imparting flexibility to the natural leather by adding a third material group including an oil-based fatliquoring agent to the natural leather without exchanging the bath used in the dyeing process; and
In order to improve the color saturation of the natural leather, a top process of performing surface dyeing by adding the powder of the vegetable natural dye to the natural leather that has undergone the eggplant process;
including,
The first substance group includes gambier, mimosa and tara,
In the dyeing process, the first material group and the second material group are added, and the drum process is performed at a temperature of 25° C. for 40 minutes, and then 4wt% of a vegetable natural dye is added based on the total weight of the mordant auxiliary and the natural leather. to perform the drum process for 180 minutes at a temperature of 25 ℃,
The top process is a method of producing natural leather using a vegetable natural dye, wherein 2wt% of a vegetable natural dye powder is added based on the total weight of the natural leather and the process is performed at a temperature of 55°C for 20 minutes. delete delete The method of claim 1,
A mordant process of fixing the third material group by adding formic acid to the natural leather that has undergone the branching process;
A method for producing natural leather using a vegetable natural dye further comprising a. The method of claim 1,
a deodorizing process of deodorizing the natural leather by adding a deodorant or iron remover to the natural leather that has undergone the branching process;
A method for producing natural leather using a vegetable natural dye further comprising a. delete The method of claim 1,
The vegetable natural dye,
A method of producing natural leather using a vegetable natural dye, characterized in that it is buckwheat, henna, indigo or mirobaran. The method of claim 1,
The third group of substances is
A method for producing natural leather using a vegetable natural dye comprising oil extracted from at least one of olive, soybean and corn. Claims 1, 4, 5, 7 and 8 of any one of claims, natural leather produced by the natural leather manufacturing method using a natural vegetable dye.

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