KR100617978B1 - The development of cow like split leather by steer hide - Google Patents

Abstract

The present invention utilizes a split leather of steal hide, which has a loose feel and a long surface brushing of the fibrous tissue, and has excellent astringent properties other than chromium, which can make the fibrous tissue dense in the tanning process. Various tanning agents and sodium metasilicates are mixed with chromium tanning agents to increase the physical properties of densified fibrous tissues, and branching agents that affect the surface feel (e.g. Phosphorylated eggplant, natural ingredients, etc.) mixed with 3 to 4 kinds of leather is pressed and semi-dried by vacuum (Vacuum) after the dyeing / eggplant process is finished, the surface wet buffing (Wet Buffing) in the state containing water ) To improve the feel of the surface smoothly and smoothly, and also to perform the second dyeing / branching process again to soften the surface brushing of the leather. And to implement a method for producing a bovine (Cow hide) and similar yukmyeon cow leather (Cow split leather like) having a dense fiber tissue and soft hand like.

Ox skin, cow skin, beef skin, wet buffing, brushed

Description

Manufacturing Method of Cow-like Beef Leather Using Raw Bull Skin {THE DEVELOPMENT OF COW LIKE SPLIT LEATHER BY STEER HIDE}

1 is a process chart showing a method of manufacturing a cow-like type of six-sided leather using the raw cow hide according to an embodiment of the present invention.

Figure 2 is a view showing a comparison between the six-sided leather products according to the present invention and the six-sided leather products.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing split leather, and more particularly, to a method for manufacturing a beef-like leather using a cow hide.

As is well known, the method of manufacturing the ox split leather, which is currently being practiced by leather companies, uses only chromium tanning agent to prevent the increase of heat resistance and decay of the fiber, and is based on phenol and acrylic ( Synthetic briquettes such as acryl and resin are used to give the leather fullness. In addition, since the branching agent is mainly used for synthetic fatliquor in the dyeing / branching process, it is difficult to shorten the surface raising with wet buffing due to the rough surface feel.

Particularly, in the case of the leather manufactured as described above, when the leather is loose and the leather is easily stretched, the surface peels like an orange peel when the leather is pulled out, and also the tensile strength or the tear strength occurs. In addition to the low physical strength of the leather itself pinhole (pinhole) or wrinkles (Shrinkage) is not improved, the surface remains intact in the situation is forced to be sold as a low-quality leather to consumers.

Therefore, the present invention is to solve the problems as described above, the purpose is to use a low-grade bull hide (Steer hide) with a loose fiber structure and rough surface feel, as well as excellent physical strength as the fiber structure is dense The present invention provides a method of manufacturing a leather product in which the tissue is tight by improving damage such as pinholes or wrinkles of the leather itself.

In addition, another object of the present invention is to soften the surface of the surface hides of rough hides (Steer hide), and to soften the surface brushed by the mixed application of the branching agent and mechanically raised the surface brushing, such as cow hide It is to provide a method for producing a cow-like beef skin leather having a.

Hereinafter, a preferred embodiment according to the present invention will be described in detail. In addition, it should be noted that in the following description, only parts necessary for understanding the manufacturing method of the leather product of the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

The apparatus used when manufacturing a ox-skin leather product with a dense fiber texture and a soft surface feel according to the present invention was carried out by controlling temperature and time using a drum, and an animal state for producing a dense leather product with a fibrous tissue. Chromium tanning agent used in the tanning and retanning process together with aluminum tanning, zirconium tanning and vegetable tanning In order to increase the convergence of the fibrous tissue, and to apply the liquid in the form of sodium metasilicate powder called water glass, it maximizes the convergence within the range that the yield of leather is not reduced. In this way, the fiber structure is dense to establish a split leather manufacturing process having excellent physical strength.

In addition, the present invention is not limited to the tanning process and the retanning process of the manufacturing process of leather, but also synthetic branching agent (eg, sulfated branching agent, sulfite oxidation process) in dyeing / branching process that gives color and flexibility to tanned leather. It is applied to the languid manufacturing process mainly used for paper, sulfonated liquor, etc., and it is mixed with lanolin and lecithin based natural ingredients to increase the flexibility of brushing the surface. leather) manufacturing process.

After the dyeing / branching process, the leather is pressed by vacuum and semi-dried, and the surface wet buffing is performed in the state of containing water to give the surface brush short fiber to give soft and silky touch. Another method is to dry the leather after the dyeing / branching process, and then put it back into the drum to perform dyeing / branching process again to maximize the flexibility of surface brushing by cow dyeing. The leather manufacturing method which has a surface feel like this was established.

On the other hand, the following leather manufacturing process according to the present invention and the leather manufacturing process, preferably tanning process, retanning process and dyeing / eggplant process of the tanning process and the process for short fiber of the surface raising by the mechanical method An embodiment is described.

The manufacturing method of split leather is classified into three types: preparation process, tanning process, and dyeing / branching process.

First of all, the preparation process is called hair peeling in the raw hide, and since the required thickness varies depending on the purpose of use, leather splits the flesh layer of the skin to a certain thickness. To be adjusted. In this process, it is divided into grain leather having a papillary layer and split leather having a reticular layer. In the case of the grained leather, the skin is dense and has excellent physical strength, but has a brushed surface on both sides. Silver fiber tissue is relatively loose and has a weak physical strength. Cattle are also classified into steal hide and cow hide, which are more loose in fibrous structure and have longer surface brushing and rough feel than cows. have.

Conventional tanning and retanning processes use various tanning agents to convert animal proteins into minerals, but more than 90% of the majority of leather companies use chromium metal salts. However, chromium salt is a harmful substance that causes skin allergies. It is used to adsorb 30 ~ 50% more than the actual amount of binding to leather. Among them, only 50 ~ 70% is combined with leather and the rest is wastewater. It is difficult to use chromium salt alone to make fiber texture of cow hide split leather as dense as cow like split leather.

In the existing dyeing / branching process, which is carried out through the preparation process, tanning process, and retanning process as described above, acid dyes, basic dyes, metal dyes, etc. are used for the production of colored leather to give the color of the leather. In addition, the production of white leather (TiO ₂ ) is used to increase the whiteness. In the eggplant process to give flexibility and surface feel to the dyed leather, the eggplant process is performed mainly using synthetic eggplant (eg, sulfated eggplant, sulfite sulfide, sulfonated eggplant, etc.). It is difficult to make the surface feel smooth and silky by myself.

Therefore, the amount of chromium used in the tanning process and the retanning process of the leather manufacturing process is reduced, and the aluminum structure, the zirconium-based emulsion, the vegetable-based emulsion and the textile structure are excellent. Sodium metasilicate, which has an excellent effect on densification, is mixed with chromium tanning agent to make fiber tissue dense, and then natural eggplant, lanolin and natural branching agent, which are commonly used in the dyeing / branching process. Lecithin-based branching is mixed to soften the fibrous tissue. In addition, after the dyeing / branching process is finished, the leather is compressed and semi-dried by vacuum to wet buff the surface in the state of containing water to shorten the surface brush of the flesh layer to make the surface feel soft and silky. After the dyeing / branching process is finished, the leather is dried and put back into the drum, followed by a two dyeing method that performs the dyeing / branching process secondarily to maximize the flexibility of surface raising, resulting in a dense fiber structure. The company will manufacture Cow like split leather products with excellent surface feel.

Hereinafter will be described in detail based on the preferred embodiment of the present invention, the present invention is not limited by the embodiment. In particular, the present invention is found to be applicable to the overall tanning process and mechanical working process of leather products.

{Example 1}

The amount of chromium used is 3-8% in the existing tanning process in which 60 ~ 180 minutes of rotation using 4-10% of chromium is used to produce dense leather products using bull hide split leather. Rotate 60 to 180 minutes, then mix and apply 1-5% of chromium-based emulsions (preferably, aluminum-based, Zirconium-based, and vegetable-based). Rotate minutes, add 0.3 ~ 3% magnesium oxide and rotate it for 180 ~ 600 minutes to increase basicity to reduce chromium usage by 20% or more. Cow like split leather leather products were made.

{Example 2}

In order to maximize the density of fiber of bull hide split leather, 0.1 ~ 3% sodium metasilicate was added and rotated for 20 ~ 120 minutes, followed by 3 ~ 8% chromium. After rotating for 60 to 180 minutes, mixing and applying 1 to 5% of an oil material other than chromium (preferably, an aluminum emulsion material, a Zirconium emulsion material, a vegetable emulsion material, etc.), and then rotating for 30 to 120 minutes 0.3-3% magnesium oxide was added and rotated for 180 to 600 minutes to increase the basicity to produce a cow-like split leather product having excellent physical properties due to its very high fiber structure. It was.

{Example 3}

In the retanning process performed after the shaving process to control the thickness, 0.1-3% sodium metasilicate is added and rotated for 20 to 120 minutes in the same manner as in the tanning process, followed by 1 to 5% Chromium and 1 ~ 3% emulsion of intermetallic agent and rotating for 60 ~ 180 minutes, then emulsion materials other than 1 ~ 5% of chromium (preferably aluminum emulsion, Zirconium emulsion, Vegetable type Emulsion materials, etc.) was rotated for 30 to 120 minutes, and 0.5 to 2% of sodium bicarbonate (NaHCO ₃ ) was applied to increase the basicity, thereby preparing a densely-fiber male skin leather product.

The present invention, which performs the tanning process and the retanning process in the above manner, reduces the amount of chromium tanning agent and mixes other emulsion materials to form a smooth bond with the animal protein to the carboxyl group, thereby making it suitable for the leather manufacturing process. In addition to imparting heat resistance, the fiber structure was dense, resulting in a cow like split leather product having superior physical properties compared to conventional products.

{Example 4}

After the tanning process and the retanning process, the existing synthetic branching agent (sulfate branching agent, sulfite oxidation process) is performed in the dyeing / branching process to make color, softness and surface feel soft and silky on the dense leather. The amount of synthetic branching agent is reduced to 2-8%, and 2-5% of natural branching agents (Lanolin, Lecithin, etc.) are mixed. The amount of eggplant used is 4 ~ 13% to soften the feel of surface brushing. After wet dyeing / branching, the leather is vacuum-pressed and semi-dried, and the surface wet buffing is performed with 5-30% moisture. The surface was brushed to short fibers to prepare a soft, silky cow like split leather product.

{Example 5}

In order to maximize the surface feel of split leather, after finishing tanning, retanning and dyeing / branching process, the leather is dried and then put in a drum and then 0.1 ~ 3% of dye and 1 ~ 6% of eggplant. After the two dyeing method, which performs two dyeing / branching processes to fix dye and eggplant using 0.2 ~ 2% of formic acid (HCOOH), vacuum-compresses and semi-drys the leather to moisture 5-30. Surface wet buffing (Wet Buffing) was carried out in the% contained state to make the surface raising as short as possible to produce a soft, silky cow like split leather surface texture (Silky).

As described above, the present invention reduces the amount of chromium which is a hazardous substance during the manufacturing process of the hide hide of leather (Steer hide), and other emulsion materials (preferably, aluminum-based emulsions together with chromium tanning agent). Materials, Airconium-based emulsions, vegetable-based emulsions, etc.) and sodium metasilicate were mixed in the tanning process to increase the density of fiber texture of ram skins with loose fibrous texture. The mixed application to the retanning process has established a process for producing hydrogen-hexagon leather products with a dense fiber structure and excellent physical properties.

In addition, in the dyeing / eggplant process, synthetic eggplant is mixed and used, and natural eggplant is mixed, and the surface wet buffing (Wet Buffing) is carried out in the state of containing water by vacuum-pressing and semi-drying the finished leather. By making the surface brushed to shorten the fiber, the surface feel was smoothly improved. After finishing the dyeing / branching process, the dyeing / branching process was again performed. High-value added to increase sales unit price of Steer hide split leather, which has been sold at low cost by establishing a method of manufacturing a cotton leather product with soft and silky touch by making the surface raising as short as possible. There was an effect to obtain a value leather goods.

Claims (6)

In the manufacturing method of split leather products comprising a tanning process, a retanning process and a dyeing / branching process, In addition to chromium tanning agent used in the tanning process and the retanning process of the leather manufacturing process, one tantalum and sodium metasilicate selected from {aluminum tanning, airconium tanning, vegetable tanning} A method of increasing the physical properties by densifying the fibrous tissue of a split leather of a loose cow by the method; In the dyeing / branching process, a synthetic branching agent is used in combination with a natural branching agent, and the dyeing / branching process is pressurized with vacuum and subjected to surface wet buffing in a semi-dry state to soften the surface feel. And second step of the dyeing / branching process again, and vacuum squeezing and semi-drying, followed by buffing to produce a six-sided skin having a soft, smooth feel and a cow-like feel. Method for manufacturing cow-like beef skin. The method of claim 1, wherein the tanning process, Rotate 60-180 minutes with 3-8% of chromium in a cowhide skin, mix and apply one of the tanning agents selected from the above-mentioned tanning agents other than 1-5% of chromium, and then rotate for 30-120 minutes. A method of manufacturing cow-like beef skin using cow hides, comprising a tanning process in which 0.3 to 3% of magnesium oxide is added to increase the basicity by rotating 180 to 600 minutes. The method of claim 1, wherein the tanning process, 0.1-3% sodium metasilicate was added to the male skin, followed by rotation for 20 to 120 minutes, followed by rotation for 60 to 180 minutes using 3 to 8% of chromium. Oxygen, characterized in that the tanning process to increase the basicity by rotating the 30 to 120 minutes, and then by adding 0.3 to 3% magnesium oxide to rotate the 180 to 600 minutes by mixing and applying one of the selected emulsion materials Method for manufacturing cow-like beef skin using raw hides. The method of claim 1, wherein the retanning process, 0.1 to 3% of sodium metasilicate was added and rotated for 20 to 120 minutes. Then, 1 to 5% of chromium and 1 to 3% of emulsions were added to rotate for 60 to 180 minutes, followed by 1 to 5% of Oxygen, characterized in that the retanning process is applied by applying one of the above-mentioned emulsions other than chromium, rotating for 30 to 120 minutes, and applying 0.5 ~ 2% of NaHCO ₃ to increase the basicity Method for manufacturing cow-like beef skin using raw hides. The method of claim 1, wherein the dyeing / branching process, After dyeing by rotating for 10 to 120 minutes using 0.1 to 3% of dye and white fat sugar (TiO ₂ ), the amount of one synthetic branch selected from {branched sulfide, sulfite sulfide, sulfonated branching} is used. 8% of the total amount of branching agent is applied for 30 ~ 120 minutes using 4 ~ 13% of total branching agent by applying 2 ~ 5% mixed with natural ingredients of branching agent selected from {Lanolin, Lecithin strain}. After this, the raw hides are characterized by a dyeing / branching process and a mechanical process which shorten the surface raising by performing surface wet buffing in a state of containing 5-30% of moisture by vacuum pressing and semi-drying by a mechanical method. Method for manufacturing cow-like beef skin used. After the tanning, retanning, and dyeing / branching process of the ox hides are finished, the leather is dried, and then dyed for 20 to 120 minutes by adding 0.1 to 3% dye and liposaccharide (TiO ₂ ) from a drum. After adding 6%, apply two dyeing method to double dyeing / branching process to fix dye and eggplant using 0.2 ~ 2% formic acid (HCOOH), and then vacuum compression and semi-drying A method of manufacturing cow-like beef skin using a cow hide, which is characterized by a mechanical work process of performing surface wet buffing in the state of containing 5 to 30% of moisture to make surface raising as short as possible to increase surface feel.

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