KR102400006B1 - Eco-friendly manufacturing method of natural leather using ocher - Google Patents

Abstract

An eco-friendly manufacturing method for natural leather using loess according to the present invention comprises: a washing step for washing natural leather; a dyeing step for injecting, into the natural leather, loess, salt, a first material group comprising plant components, and a second material group comprising a polymer; 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 ocher

The present invention relates to a method for manufacturing natural leather using loess, and by producing natural leather having ocher color using loess, a natural dye, during the dyeing process of natural leather, color superior to natural leather dyed with synthetic dyes and It relates to a method of manufacturing an eco-friendly natural leather that is harmless to the human body and has a beautiful color due to the amount of dyeing.

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 described above, and is to provide a method for manufacturing natural leather having an ocher color using loess.

In addition, it is to provide a natural leather manufactured by a method for manufacturing natural leather having a ocher color using loess.

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.

The eco-friendly manufacturing method of natural leather using ocher of the present invention for achieving the above object is a washing process for washing natural leather, a first material group containing plant components in the natural leather, and a second material containing a polymer It may include a dyeing process of adding group, loess and salt, and a branching process of giving flexibility to the natural leather by adding a third material group including an oil-based 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.

And in order to improve the color saturation of the natural leather, it may further include a top process of performing surface dyeing by adding ocher powder to the natural leather that has undergone the eggplant process.

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

And it may further include 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.

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

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

And the ocher colored natural leather of the present invention for achieving the above object can be manufactured by the eco-friendly manufacturing method of natural leather using the loess mentioned 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, according to the osmotic action of the salt, it is possible to increase the dyeing adsorption rate of the ocher color, and it is possible to increase the productivity by shortening the time of the dyeing process.

Fourth, natural leather having an ocher color 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 loess 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 loess of the present invention will be described with reference to FIG. 1 , which is a flowchart of an environmentally friendly manufacturing method of natural leather using loess of the present invention.

The eco-friendly manufacturing method of natural leather using loess 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 the natural leather contains a first material group containing plant components, a second material group containing a polymer, ocher and salt. 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 loess is for developing the color of the leather in ocher color, and it is preferable that 10wt% to 50wt% is added based on the total weight of the natural leather. Specifically, when using coarse particles, the loess may cause scratches on the surface of the natural leather and lower marketability, so 1 inch-sized loess is divided into 325 and finely powdered (that is, loess 325). it is preferable

The salt can facilitate the ocher discoloration of the leather by osmotic pressure, and it is preferable that 0.5wt% to 1.5wt% is added based on the total weight of the natural leather.

Specifically, in the dyeing process, the first material group and the second material group are put in, and the process is performed at a temperature of 25° C. for 40 minutes, and a mordant auxiliary, loess, and salt are added to the process for 180 minutes at the same temperature. It is preferable to perform

In the conventional case, as a natural leather dyeing technique, the process of adding water, fixing formic acid and waxing (washing with water) after the dyeing process is generally performed, but in the present invention, by performing the branching process without exchanging the bath after the dyeing process, the 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.

In the case of the present invention, when performing the branching process after the dyeing process, it can be carried out without replacing the bath, and thus the dye adsorption rate of loess is maximized, so that 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

Before overnight process After overnight process

In addition, in the environmentally friendly manufacturing method of natural leather using loess of the present invention, the top process (S500), the mordant process (S600) and the deodorization process (S700) may be sequentially performed after the branching process.

In the top process (S500), in order to improve the color saturation of the natural leather, ocher powder may be added to the natural leather that has undergone the branching process to perform surface dyeing.

Specifically, the top process may be to perform the process for 20 minutes at a temperature of 55 ℃ by adding 10wt% to 50wt% of the loess used in the dyeing process with respect to the total weight of the natural leather.

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, in the deodorization process, 300 wt% of water, 1 wt% of a deodorant, and 0.3 wt% of an iron remover are added with respect to the total weight of the natural leather, and the process may be performed at a temperature of 25° C. for 30 minutes.

In addition, the present invention provides a natural leather having an ocher 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 eco-friendly manufacturing method of natural leather using loess of the present invention described above, natural leather having an ocher color was prepared by using the processes and materials described in Table 2 below.

fair substance name weight% 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 loess 325 10 to 50 salt 0.5 to 1.5 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 TOP (loess 325) 10 to 50 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 20 wt% of loess and 0.5 wt% of salt based on the total weight of the mordant aid and natural leather. was added and the drum process was performed at a temperature of 25° C. for 180 minutes to prepare natural leather.

(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, 20wt% of loess and 1.5wt% of salt based on the total weight of the mordant auxiliary and natural leather. was added and the drum process was performed at a temperature of 25° C. for 180 minutes to prepare natural leather.

(Comparative example)

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 20wt% of loess was added based on the total weight of the mordant aid and natural leather to 25°C. The drum process was performed at the temperature for 180 minutes to prepare natural leather.

The values comparing the colors of the leather according to the Preparation Examples of Examples 1 and 2 and Comparative Examples are the same as in [Table 3].

division Example 1
(loess 20wt% +
salt 0.5wt%) Example 2
(loess 20wt% +
salt 1.5wt%) comparative example
(loess 20wt%) grain side

fresh side

As can be seen in [Table 3], it can be seen that the saturation is reduced as salt is added, and through this, it can be seen that the ocher component penetrates into the leather. As the ocher color penetrates into the leather, sewing, sewing or punching, etc. required when manufacturing products such as handbags and shoes using the ocher-colored natural leather manufactured by the eco-friendly manufacturing method of natural leather using ocher of the present invention In various processes, it is possible to minimize the appearance of the color of the leather before dyeing, thereby increasing the value of the product.

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 (8)

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 containing plant components, a second material group containing a polymer, loess soil and salt to the natural leather;
a branching process for imparting flexibility to the natural leather by adding a third material group including an oil-based fatliquoring agent to the natural leather without exchanging a bath;
In order to improve the color saturation of the natural leather, a top process of performing surface dyeing by putting ocher powder into the natural leather that has undergone the branching process; and
A mordant process of fixing the third material group by injecting formic acid into the natural leather that has undergone the top process;
includes,
In the dyeing process, loess is input in an amount of 10 wt% to 50 wt% based on the total weight of natural leather, and salt is added in an amount of 0.5 wt% to 1.5 wt% based on the total weight of natural leather,
In the saw process, the loess powder is added in an amount of 10 wt% to 50 wt% based on the total weight of the natural leather and is carried out at 55 °C,
The first material group, including gambier (gambier), mimosa (mimosa) and tara (tara), an eco-friendly manufacturing method of natural leather using ocher. delete delete delete 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;
An eco-friendly manufacturing method of natural leather using loess further comprising a. delete The method of claim 1,
The third group of substances is
An eco-friendly manufacturing method of natural leather using loess containing oil extracted from at least one of olive, soybean and corn. Claims 1, 5, and 7 of any one of claims 1, 5 and 7 of the natural leather using the environment-friendly manufacturing method of natural leather of the color of ocher.

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