KR100347489B1 - Preparation of Rana Catesbeiana Shaw Leather - Google Patents

Abstract

The present invention relates to a method for manufacturing a bullfrog leather, a process of salting a bullfrog shell, a step of removing fat in the shell by immersing in a surfactant solution of pH 9-10, an aqueous alkaline solution of pH 12-13 Process to remove protein and release fiber, neutralizer treatment process, silver processing by enzyme treatment (harm), pickling process to be immersed in cold salt water, acid to salt to adjust pH to 2.6 ~ 2.8 Process, process to add glutaraldehyde to oil processing, process to neutralize to pH below 5.5 by adding alkali, tanning process, eggplant process, and fixing process by formic acid. It's soft, durable and can provide high quality leather goods at an economical price, resulting in economic benefits for the frogs. Female bulls will be able to help greatly indirectly.

Description

How to Make Bullfrog Leather {Preparation of Rana Catesbeiana Shaw Leather}

The present invention relates to the use of bullfrog (Rana Catesbeiana Shaw) threatening the ecosystem and endemic species of Korea, and more particularly to a method for obtaining high-quality leather from bullfrog.

Bullfrog is an amphibian belonging to the frog family of frogs, originally distributed in the Americas, but has been spread throughout the country by individuals who came out of Japan since the 1970s for food and farm income, and now threaten our ecosystem. . It is inhabited by reservoirs, dams, rivers, rivers, and waters all over Korea, and it is inhabited by waters and reservoirs in the Geomdan Channel and Ganghwa Island, Seomdan-myeon, Incheon. The tadpole is 12 ~ 13㎝ which is much bigger than the existing frog, and when it is adult, it is about 15 ~ 20㎝. It has a larger body size than the existing frogs in Korea and can be easily distinguished outdoors. Young frogs have a greenish color from head to back and sometimes turn black as they grow. The growth rate is so fast that two years after hatching, they grow into adult frogs and are called bullfrogs because crying sounds are similar to bulls crying. The bullfrog lays about 6,000 to 40,000 eggs at a time, and the stock of the tadpole eats the larvae of other frog species or the fish of fish for the intake of vegetation such as plants or sometimes protein. It grows, and the bullfrog's appetite is very active, with fish, amphibians, reptiles, and insects as staple food. Life expectancy averages 5-7 years in the wild.

In order to protect the Korean ecosystem and endemic species, it is urgent to eradicate bullfrogs, and in order to efficiently carry out them, it is necessary to give economic benefits from the extermination of bullfrogs. More diversification will be required.

Accordingly, the present invention aims to provide a new use of bullfrog.

In the research of the present inventors to solve the above problems, it was found that the ox-frog leather obtained by processing the ox-frog shell in a special method is not only beautiful in appearance, but also soft and durable, making it suitable for the manufacture of high-quality leather products. The invention was devised.

Therefore, according to the present invention, the process of salting a bullfrog shell, immersing in an aqueous surfactant solution of pH 9 to 10 to remove fat in the shell, removing proteins and releasing fibers in an alkaline aqueous solution of pH 12 to 13 Process, neutralizer treatment process, silver noodle processing process (enzymatic treatment), pickling process immersed in cold salt water, acid adjustment to pH 2.6-2.8 by adding acid to salt water, glutaraldehyde There is provided a process for producing bullfrog leather, which comprises a process of oil processing, a process of neutralizing the pH to below 5.5, a tannin treatment process, an eggplant process, and a fixing process by formic acid.

Hereinafter, the present invention will be described in more detail.

In the method of manufacturing a ox frog leather according to the present invention, salting the ox frog shell is intended to prevent decay, and the salted shell is washed with water at about 25 ° C. and then treated with an aqueous surfactant solution to remove fat from the shell. Should be given. Although not specifically limited, soda ash (Na ₂ CO ₃ ) is preferable as the surfactant, and the pH of the aqueous surfactant solution is suitably 9 to 10.

After removing the fat by surfactant treatment, the skin of the bullfrog is washed with water at about 25 ℃ and then put in a strong alkaline aqueous solution of pH 12-13 to remove protein and loosen the fiber. Although not particularly limited, the aqueous alkali solution is an aqueous solution of approximately one or two or more mixtures selected from the group consisting of sodium sulfide (NaHS), sodium sulfide (Na ₂ S) and calcium hydroxide in water at approximately 25 ° C. It is preferable to use the thing prepared so that pH of 12-13 may be added.

In this way, the bullfrog shell, which is treated with strong alkali to remove protein and freed fibers, is washed with water and then neutralized to remove alkali remaining in the shell. As such a neutralizing agent, ammonium sulfate, ammonium chloride or a mixture thereof may be used.

Alkaline stripped bullfrog shells are enzyme-treated and treated to have a smooth surface. The silver-coated shell is washed with water, and then immersed in salt water at a low temperature, preferably 5 to 10 ° C., and an acid is added thereto so as to have a pH of 2.6 to 2.8. Although not particularly limited, the acids which may be used include formic acid, sulfuric acid or mixtures thereof. Next, the planetary process is performed, and additives that can be used include glutaraldehyde and the like, and when the planetary process is performed in this way, the bullfrog shell does not ripen and decay at high temperatures.

The oil-processed shell is to be neutralized, wherein the neutralization is preferably carried out in a secondary. For example, it is preferable to add alkaline, such as sodium bicarbonate, to firstly neutralize the pH to 3.8 to 4.2, and to wash the water, and then to add alkali, such as sodium formate and sodium bicarbonate, to neutralize the secondary to pH 4.5 to 5.5 and washed with water. . After the first neutralization and the second neutralization, washing with water is preferably performed with hot water at 30 to 40 ° C.

Next, tannin processing is carried out using synthetic or natural tannins, and after the eggplant process is performed using eggplant to soften the leather, it is fixed using formic acid.

Washing the shells of these frogs with cold water, spreading them well and drying them in the shade gives a soft and tough bullfrog skin.

Features and other advantages of the present invention as described above will become more apparent from the embodiments described below. However, the present invention is not limited to the following examples.

EXAMPLE

Bullfrog leather was produced by the following steps.

(1) Peel off the bullfrog.

(2) Salt the peeled skin (salt).

(3) Wash with water at 25 ° C.

(4) Na ₂ CO ₃ , a surfactant, is dissolved in water, and the skin is placed in a solution of which pH is adjusted to 9.5 to remove fat from the skin.

(5) Wash with water at 25 ° C.

(6) Remove the protein and release the fibers by putting the shell in an alkali solution of pH 12.5 obtained by dissolving NaHS, Na ₂ S, Ca (OH) ₂ in water.

(7) Wash with water.

(8) Add ammonium sulfate and ammonium chloride to remove alkali.

(9) Enzymatic treatment makes soft silver noodles (hyo).

(10) Wash with water.

(11) Soak in 7 ℃ salt water.

(12) Formic acid and sulfuric acid are added, and pH is adjusted to 2.6-2.8.

(13) Add glutaraldehyde and oil process.

(14) Add NaHCO ₃ to adjust the pH to 4.0.

(15) Wash with water at 35 ° C.

(16) Add sodium formate and sodium bicarbonate to adjust the pH to 5.0.

(17) Wash with water at 35 ° C.

(18) Treatment with tannins.

(19) process with eggplant (加 제).

(20) Fix with formic acid.

(21) Wash with cold water.

(22) Spread well and dry in the shade.

The time required to perform the above steps was 1 day in steps 3 to 5, 1 day in steps 6 to 7, 1 day in steps 8 to 12, and 1 day in steps 13 to 14.

As a result, it was attached to the processed cowhide leather with the obtained bullfrog leather and made accessories products such as necklaces, hairpins, and wallets. The texture was soft, durable, and beautiful in appearance, and was sufficient to satisfy consumer's taste.

As described above, according to the present invention, it is possible to give economic benefits to the bullfrog, which can greatly help indirectly in combating the bullfrog, and the obtained bullfrog leather is beautiful in appearance and soft and durable so that high-quality leather goods can be economically The effect of being able to offer at a price can be achieved.

Claims (1)

In the method for manufacturing a bullfrog skin, a step of salting a bullfrog shell, a step of immersing in a surfactant solution of pH 9 to 10 to remove the fat in the shell, a protein in the alkaline solution of pH 12-13 Process to remove fiber and remove fiber, process neutralizer, process silver processing by enzymatic treatment (harm), pickling process to be immersed in low temperature salt water, process to adjust pH to 2.6 ~ 2.8 by adding acid to salt water, glutar Method of manufacturing bullfrog leather, characterized in that it comprises a step of adding aldehyde (glutaraldehyde), oil processing, neutralization to pH 5.5 or less, tannin treatment, eggplant process, and fixing process by formic acid .