KR20120123736A - Method for producing flounder leather used flounder skin - Google Patents

Abstract

PURPOSE: A manufacturing method of flounder leather is provided to provide a flounder leather expressing the inherent pattern of flounder skin while minimizing harmful side-effects to human health. CONSTITUTION: A manufacturing method of a flounder leather comprises: a limestone treatment of flounder skin using sodium sulfide(Na2S), sodium hydrosulfide(NaSH) and lime(Ca(OH)2) with a paddle or a drum; a tanning step using a chrome tanning agent, and a re-tanning step using 1-50% white firewood and charcoal; a dyeing/fat-liquoring step using natural dye and fat-liquoring agent; and a drying step drying the treated flounder leather by using a vacuum dryer. [Reference numerals] (AA) Comparative embodiment 1; (BB) Embodiment 1; (CC) Gall; (DD) Indigo; (EE) Sappan wood; (FF) Tumeric

Description

How to make flounder leather using flounder skin {Method for producing flounder leather used flounder skin}

The present invention relates to an environment-friendly flounder leather utilizing the flounder skin and a method of manufacturing the same.

Currently, the general natural leather is mainly produced by utilizing the epidermis of mammals such as cattle, horses, pigs, sheep, goats, or birds such as ostrich or reptiles such as crocodiles, lizards, snakes, and the like.

In addition to the skin of mammals, birds, and reptiles, natural leather is also used for fish such as eel, stingray and shark. In addition, since the texture, pattern, and use of natural leather are very different depending on what kind of leather they are made of, it is still necessary to research new materials to satisfy various consumer's preferences.

However, unlike ordinary land animals, fish skin is very weak in tissue and requires careful attention during the tanning process, and unique scales large and small according to species instead of hair of terrestrial animals. (Scale) and due to excessive rotation and damage to the surface is being sold as a mid-priced product.

On the other hand, in the case of leather products with the most contact with human body, there is a high concern that it may cause skin allergy or atopic side effects such as atopy by giving a color to leather using synthetic dyes. In particular, children with weak skin, the elderly, patients with long-term illnesses and the disabled have very sensitive reactions to the external environment or their own belongings or have serious rejection of human toxicity. It is recognized.

Therefore, the present inventors apply natural dyes to the dyeing process of flounder to develop a method for developing a highly sensitive leather material that gives fashion, originality and scarcity of the flounder itself and human friendliness according to the application of natural pigments. Reached.

 The present invention is to provide a human-friendly, soft and uniform form of flatfish leather using natural pigments and a method for producing the same.

The present invention provides a method for producing flatfish leather utilizing the flatfish skin. More specifically,

(a) a limestone process which is treated with a soaking process soda (Na ₂ S), sodium hydride (NaSH) and lime (Ca (OH) ₂ ) in a paddle or drum;

(b) a tannin process using a chrome tanning agent and a retanning process using 1-50% white syntan;

(c) dyeing / branching process using natural dyes and eggplants; And

(d) a drying step of drying using a vacuum dryer;

It provides a manufacturing method of flounder leather.

In addition, the present invention provides a flatfish leather and its use prepared by the manufacturing method.

The flounder leather of the present invention minimizes the adverse effects on human health by using natural pigments, and establishes a recycling technology for organic resources that are discarded and increases the selling price different from existing products that do not express the unique patterns of the flounder fish. High value-added flounder leather products can be obtained.

1 is a comparison of flatfish leather using a synthetic dye (Comparative Example 1) and flatfish leather using natural dyes (Example 1).
Figure 2 relates to a process block diagram for producing a highly sensitive leather using the flounder skin according to the present invention.

The present invention relates to a method for manufacturing environment-friendly flounder leather using flounder skin. More specifically,

(a) a limestone process in which paddles or drums are treated with a soaking process and using soda (Na ₂ S), sodium hydride (NaSH) and lime (Ca (OH) ₂ );

(b) a tannin process using a chrome tanning agent and a retanning process using 1-50% white syntan;

(c) dyeing / branching process using natural dyes and eggplants; And

(d) a drying step of drying using a vacuum dryer;

It provides a manufacturing method of flounder leather.

The soaking step (P100) refers to a process of removing soluble proteins in salt and raw material sprayed in order to prevent decay such as dirt and blood attached to the skin, absorbing water, softening it, and reducing it to the state of raw skin.

The lime process (P200) is to immerse the skin in a solution containing a strong alkaline chemicals such as calcium hydroxide to remove the hair (scales) of the skin, the epidermal layer and water-soluble proteins, fats, etc., swelling the fiber tissue, flounder itself Refers to the process of giving its unique characteristics.

In addition, after the process, the lime penetrated into the skin is neutralized and removed by using a deliming agent such as eye or salt eye, and a deliming treatment and an unnecessary protein layer (collagen) are used to return the swollen state to its original state. Hydrolysis with a degrading enzyme to relax the fibrous tissue to improve the flexibility and stretch, and may further include a step of performing a bating (Bating) process to obtain a beautiful leather (Grain).

In the present invention, it is possible to use sodium emulsion (Na ₂ S) and sodium hydroxide (NaSH) in the lime process (Liming) to induce the relaxation of collagen fibers forming the tissue of the leather to facilitate the removal of scales. By removing the scales on the surface of the flatfish skin, flounder leather can be manufactured with a natural surface effect. The sodium sulfate (Na ₂ S) and sodium hydroxide (NaSH) is used 0.1 to 6.5 parts by weight based on 100 parts by weight of flounder skin, lime (Ca (OH) ₂ ) 0.1 to 10 parts by weight, 1 hour to 48 It can include processing at time, 10-25 degreeC.

If the amount of lime used is less than 0.1 parts by weight or the treatment time is less than 1 hour, there is a fear that the scales of the fish may not be properly removed, and when the amount of use exceeds 10 parts by weight or more than 48 hours of the treatment time, the productivity may decrease or Alternatively, excessive alkali swelling may cause problems of the flounder skin tissue.

In addition, in order to minimize physical damage (Damage), the soaking and lime processing may include a temperature of 10 ~ 25 ℃ in the paddle (paddle). If the treatment temperature is less than 10 ℃, the problem of poor penetration of the drug due to the opening of the tissue of the skin does not occur, if the temperature exceeds 25 ℃, the protein component of the flounder occurs hydrolysis, damage the flounder leather itself to damage the leather Can be difficult to manufacture.

In addition, the temperature of the 10 ~ 25 ℃ is the optimum temperature condition to prevent the denaturation and hydrolysis of the protein of the flounder may be impossible to manufacture the normal flounder.

In addition, the paddle may be treated with water and lime using 400 to 600 parts by weight of water based on 100 parts by weight of flatfish fish. And the deliming treatment may include the treatment by rotating in the drum.

The tanning process (P300) is a process of making a stable fiber structure by reacting collagen protein and tanning agents such as chromium.

In the present invention, the tanning process may include treating 1 to 20 parts by weight of a chrome tanning agent based on 100 parts by weight of flatfish fish.

If the amount of the chrome tanning agent (chromium tanning agent) is less than 1 part by weight, it does not improve the filling and density of the leather, do not impart heat resistance and flexibility to weaken the physical properties and the smoothness of the leather is lowered If the amount of use exceeds 20 parts by weight, excessive consumption of raw material costs and unreacted chromium will remain in the waste water, resulting in increased pollution of the water.

The present invention can produce a highly sensitive flounder leather by converting the flatfish skin to minerals using chromium to convert the protein in the animal state to minerals in order to produce pollution-free leather.

In the present invention, the retanning process uses 1 to 50 parts by weight of 1 to 50% white syntan (White syntan, Tanicor PWPp ^® , Basyntan DLE ^® , Neutan WSK ^® ) based on 100 parts by weight of flounder, 10 to 240 minutes Can be treated, in which case the whiteness is excellent and can have an excellent surface effect.

Dyeing process (P500) is a process to give a color according to the merchandise and consumer desires, eggplant process (P600) is a process to improve the quality of the flounder fish by giving the flexibility and elasticity of the flounder fish.

The dyeing process may use a natural pigment extracted from nature in place of a general synthetic dye, the natural pigment is one selected from the group consisting of gallastula, small flock, turmeric and side, 2 to 10 parts by weight of flounder skin The parts by weight can be used to establish a human-friendly dyeing process free of skin rashes and allergies.

In the present invention, the eggplant treatment in the dyeing / branching process may use 10 to 15 parts by weight of fatliquoring agent based on 100 parts by weight of tanned flounder skin.

In addition, 0.5 to 2.0 parts by weight of formic acid (CH 3 COOH) may be further used, and may be treated by rotating a drum for 60 to 480 minutes.

The eggplant is used as an additive to soften the leather during leather manufacturing, increase the fullness and sensitivity of the leather, protect the leather from moisture, contamination and external chemical influences, and formic acid has a pH of 3.2-4.0 It is used to fix the eggplant in the skin by adjusting it. If the amount of eggplant is less than 10 parts by weight, the leather cannot be softened sufficiently. There is a problem of increasing water pollution.

In addition, if the amount of formic acid is less than 0.5 parts by weight, the surface adhesion of the dyes and eggplants are poor, the problem of lowering the vividness of color and lowering of flexibility occurs, and if the amount is more than 2.0 parts by weight, flounder due to excessive surface adhesion There is a problem in that the penetration and coupling to the inside of the blood is not easy to be adsorbed only on the surface, the difference in color and flexibility of the inside and outside of the leather.

In addition, if the drum rotation time is less than 60 minutes, the penetration of the branching agent and dye is not smooth, if the drum rotation time exceeds 480 minutes, physical damage to the leather may occur due to excessive rotation.

The branching agents used in the present invention are typically branching agents used in the manufacturing process of natural leather, and there are sulfated branched branch, sulfurous acid branched branch, phosphorylated branched branch, silicone branched branch, sulfonated branched branch, etc. The kind of branching agent used in the invention is not particularly limited, but specifically, one or more kinds of natural oils, synthetic oils (Syntjetic oil, Petroleum oil), and mineral oils (Mineral oil) may be selected and used. The natural fats and oils are generic to oils obtained from nature and include animal oils, vegetable oils, and mineral oils, but are mainly classified into animal oils, vegetable oils, fish oils, and fish oils.

In the present invention, the pH adjusting agent may be used in addition to formic acid, sodium bicarbonate (NaHCO 3), sodium carbonate (Na 2 CO 3), sodium formate (HCOONa) and naphthalene-based neutral synthetic tanning agent.

Flounder skin treated with eggplant and formic acid in the above can be aged at room temperature for 3-5 days.

Finally, the flounder can be dried through a vacuum dry process (P700) by temperature and pressure in order to prevent deterioration of mercury due to shrinkage and bending of the flatfish. Finally, a highly sensitive flatfish can be manufactured. The vacuum drying process may include a pressure of 0.1 psi to 80 psi at a temperature of 1 minute to 120 minutes, 20 ~ 100 ℃. After complete drying through vacuum drying, the shrinkage rate of dry flounder is low, and the surface of the flatfish skin is uniformly compressed in the space after the scale is removed.

In addition, the present invention provides an eco-friendly flounder leather manufactured by the above production method. The flounder leather is a human-friendly flounder leather that is dyed with natural pigments and does not cause skin rashes and allergies.

The flatfish leather can be used as a special leather (Exotic leather) for shoes, wallets, bags characterized in that it has a flexible, unique surface effect, the flatfish leather according to the present invention is a unique pattern, scarcity, natural color Its advantages include no harm and other uses such as gloves and clothing.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the following examples. However, the following examples are intended to illustrate the contents of the present invention, but the scope of the present invention is not limited to the following examples. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art.

< Example  1>

Soaking and lime processes are carried out in paddles or drums, and in order to remove the scales of the flounder skin in the limestone process, sodium ₂ Na and sodium hydroxide (NaSH) are removed. 3 parts by weight of 100 parts by weight of the flatfish was used, and 5 parts by weight of lime (Ca (OH) ₂ ) was treated for 12 hours, and then the remaining scales were removed.

In the tanning process, 10 parts by weight of chromium was used for 100 parts by weight of flounder, and in the retanning process, 30% White syntan (Tanicor PWPp ^® , Basyntan DLE ^® , Neutan WSK ^® ) alone or in place of the synthetic synthetic charcoal was used. Two or more white syntans were mixed and applied for 120 minutes to provide excellent whiteness and excellent surface effect.

Thereafter, in the dyeing process, 5 parts by weight of one of natural dyes selected from natural pigments such as gallja, lumber, buckwheat and turmeric is used for 100 parts by weight of flounder, and 9 parts by weight of flounder to give flexibility of flounder. A portion of Fatliquoring agent and 1 part of formic acid (CH ₃ COOH) were applied to rotate the drum for 120 minutes.

Shrinkage after complete drying after vacuum drying under pressure of 60 psi at 70 ℃ temperature for 60 minutes using vacuum dryer after dyeing and eggplant process to prevent dry shrinkage and shape stability of flounder leather. This type of flounder leather was uniform in shape, and a leather product having an excellent surface effect was obtained by uniformly compressing the pattern of the flounder leather in a space where scales were removed.

< Comparative example  1>

Soaking and lime processes are carried out in paddles or drums, and in order to remove the scales of the flounder skin in the limestone process, sodium ₂ Na and sodium hydroxide (NaSH) are removed. 3 parts by weight of 100 parts by weight of the flounder fish was used, and 5 parts by weight of lime (Ca (OH) ₂ ) was added thereto for 12 hours to remove remaining scales.

In the tanning process, 10 parts by weight of chromium was used for 100 parts by weight of the flounder, and 5 parts by weight of synthetic dye was used for 100 parts by weight of the flounder in the dyeing process. Flounder leather prepared by rotating drum for 120 minutes by applying Fattquoring agent and 1 part by weight of formic acid (CH ₃ COOH) was dried at 50 ℃ for 12 hours in a general leather dryer. A flounder leather product was prepared.

< Experimental Example >

1.Comparison of flatfish leather

Through the above examples and comparative examples, the state of the processed flounder leather was visually observed. Surface changes of Example 1 and Comparative Example 1 are the same as in FIG.

Observation results The flounder leather processed without the synthetic dye according to the present invention, compared with the flounder leather using the synthetic dye, it was possible to impart the scarcity and originality of the material itself through the use of emotional special materials, and also used for food By using natural pigments in the dyeing process of flounder leather, it has been found that it has the general advantages of natural pigments such as antibacterial and human harm.

2. Sensory evaluation

The sensory evaluation of the flatfish skin produced by the present invention was conducted on 20 panelists of the Korea Consumer Research Institute.

The sensory characteristics were evaluated as outward, color, and overall acceptability. Very good at 7 points and very bad at 1 point were evaluated using the Likert scale.

As a result of evaluation, the color, appearance and overall acceptability of the flatfish leather produced by the present invention manufactured using natural pigments were excellent.

Claims (11)

(a) a limestone process in which paddles or drums are treated with a soaking process and using soda (Na ₂ S), sodium hydride (NaSH) and lime (Ca (OH) ₂ );
(b) a tannin process using a chrome tanning agent and a retanning process using 1-50% white syntan;
(c) dyeing / branching process using natural dyes and eggplants; And
(d) a drying step of drying using a vacuum dryer;
Method of manufacturing flounder leather comprising a. The method according to claim 1, wherein the step of (a) sodium sulfate (Na ₂ S) and sodium hydroxide (NaSH) is 0.1 to 6.5 parts by weight based on 100 parts by weight of flounder skin, lime (Ca (OH) ₂ ) is 0.1 Using 10 parts by weight, 1 hour to 48 hours, the manufacturing method of flounder leather, characterized in that the treatment at 10 ~ 25 ℃. The method of claim 1, wherein the chrome tanning agent in the tannin process of step (b) uses 1 to 20 parts by weight based on 100 parts by weight of the flounder skin. The method of claim 1, wherein in the retanning process of step (b) the white syntan is treated for 10 to 240 minutes using 1 to 50 parts by weight based on 100 parts by weight of the flounder skin. Manufacturing method. The method of claim 1, wherein the natural pigment of the step (c) is one selected from the group consisting of gallastula, cattle, turmeric, and side, flounder leather, characterized in that 2 to 10 parts by weight based on 100 parts by weight of flounder skin Manufacturing method. The method according to claim 1, wherein the branching agent of step (c) uses 1 to 15 parts by weight based on 100 parts by weight of the flounder skin. The method of claim 1, wherein the drying step of step (d) is a pressure of 0.1 psi to 80 psi under a temperature condition of 1 minute to 120 minutes, 20 ~ 100 ℃. A flounder leather made according to any one of claims 1 to 7. 9. The flounder leather according to claim 8, wherein the leather is for shoes. 9. The flounder leather according to claim 8, wherein the leather is for a bag. 9. The flounder leather according to claim 8, wherein the leather is for a wallet.

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