JPH10130699A - Preparation of rawhide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely obtain a rawhide which has significantly high transparency, e.g. does not yellow and is clear, by treating a rawhide, after the step of preparation, with formic acid and drying the treated rawhide. SOLUTION: A rawhide, e.g. a rawhide of cow, is subjected to the step of soaking to conduct washing of the rawhide, softening upon water absorption, and removal of water-soluble protein, the step of fleshing to remove the unnecessary subcutaneous layer of a fat layer on the flesh side, and the step of deliming to remove lime and unnecessary protein, thereby completing the step of preparation. The rawhide after the step of preparation is treated with formic acid and subjected to boarding to dry the rawhide, thereby preparing a hard type rawhide of cow. After the boarding, the rawhide is again immersed in water, dehydrated, and then impregnated with a suitable amt. of glycerol. It is then subjected to boarding to dry the rawhide, thereby preparing a soft type rawhide of cow. Rawhides of goat, horse, sheep, deer and the like may be treated in the same manner as described above. The step of dyeing may further be carried out to prepare a colored transparent rawhide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing highly transparent raw hide (Kikawa).

[0002]

2. Description of the Related Art Conventionally, in a method for producing such a raw hide, the formic acid treatment in the present invention is performed by a hydrochloric acid treatment or a sulfuric acid treatment.

[0003] In the case of the above-mentioned hydrochloric acid treatment, a yellowish rawhide comes out, and in the case of the sulfuric acid treatment, an unpleasant rawhide comes out.

[0004] Therefore, the present invention has been studied to produce a highly transparent rawhide which does not have the above-mentioned yellowish tint or smudge. In this study, formic acid was found to be remarkably effective through trial and error.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a new method for producing rawhide which can reliably produce a rawhide having a remarkably high transparency without yellowing or smearing. Things.

[0006]

In order to achieve the above object, a method for producing a raw hide according to the present invention comprises preparing a raw hide such as cow hide and goat hide, ie, a watering step, a backing step, a calcifying step and a dewatering step. An ashes process is performed, a formic acid treatment process is performed on the ready-prepared raw hide that has completed this preparation process, and a plate-drying process is performed on the formic acid-completed raw hide, and a net drying process and the like are performed.

[0007] Preparative steps, ie, a watering step, a backing step, a calcifying step, and a demineralizing step are performed on raw hides such as cow skin and goat skin, and a formic acid treatment step is performed on the ready-prepared raw hides that have completed these preparation steps. The formic acid-treated raw skin is subjected to a board and net drying process, and is further subjected to a draining step and a draining step.The drained raw skin is impregnated with a suitable amount of glycerin, and the glycerin-soaked raw leather is re-equipped. It is intended to perform a tension drying process such as boarding and netting,

[0008] Further, a cutting step of forming a thin string on the raw hide after impregnating glycerin is performed.

[0009]

According to the method for producing rawhide according to the first to third aspects, it is possible to produce hard (hard and hard to bend) rawhide for cows and goatskin. It is capable of producing raw hides of cows and goatskins which are soft and easy to bend. In addition, according to the seventh aspect, it is possible to produce string-like raw hides.

[0010]

According to the method for producing rawhide according to the present invention, it is possible to reliably and easily produce raw hides of hard cows and goats having remarkably high transparency and soft cows and goats having remarkably high transparency. It is possible to achieve the intended purpose sufficiently.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention comprises a first step of rinsing a raw hide of beef hide for washing, softening and absorbing water, and removing water-soluble proteins. Preparing process: lining process to remove subcutaneous layer, calcification process to remove hair and epidermis layer and swelling of skin tissue, and decalcification process to remove lime and unnecessary protein Is completed, and then the prepared raw hide that has been subjected to this preparation process is subjected to a formic acid treatment process, and then subjected to a veneering process using a veneer and dried to obtain a hard-type cowhide rawhide,

In a second embodiment according to the present invention, the prepared raw hide obtained in the same manner as the first embodiment is subjected to a formic acid treatment step and a stretching step, followed by a water return step, A draining step is performed after the completion of the returning step, and then an appropriate amount of glycerin is impregnated in the raw hide after the draining,
Then, the raw leather impregnated with glycerin is subjected to a veneering process by boarding to dry the raw leather, thereby obtaining a soft-type raw hide of cow hide,

In a third embodiment according to the present invention, a ready-prepared raw hide obtained in the same manner as in the first embodiment is subjected to a formic acid treatment step and a tensioning step, followed by a water return step. After the completion of, a draining step is performed, and then an appropriate amount of glycerin is impregnated into the peeled skin,
The glycerin-impregnated raw hide is subjected to a stretching process using a board to dry the raw hide, thereby obtaining a soft-type raw hide, and thin and long string-like cutting of the soft-type raw hide and winding to obtain a finished product. It is like that.

The present invention may be practiced on goat hides, and it is also possible to produce raw hides from horses, sheep, deer, kangaroos or other hides by performing the same steps as in the above embodiment. Further, the dyeing step can be performed at an appropriate point to obtain a colored and transparent rawhide.

The rawhide (also in the form of a string) obtained by the present invention is used as a material for handicrafts, bags / clothes or other products.

Claims (7)

[Claims] Claims 1. A raw material skin is subjected to a preparation step, i.e., a watering step, a backing step, a calcifying step and a demineralizing step,
A method for producing rawhide, wherein a formic acid treatment step is performed on the ready-prepared raw hide that has been subjected to the preparation process, and the formic acid-completed raw hide is subjected to a board-drying step such as a net-covering procedure. 2. A preparation process, ie, a watering process, a backing process, a calcifying process, and a decalcification process, which are applied to the raw hides of cowskin, and a formic acid treatment process is applied to the ready-prepared raw hides which have completed the preparation processes. A method for producing raw hides, characterized in that the finished raw hides are subjected to upholstery drying processes such as boarding and netting. 3. A preparation process, ie, a watering process, a backing process, a calcifying process, and a decalcification process, are applied to the raw skin of goatskin, and a formic acid treatment process is applied to the ready-prepared raw material skin after completing the preparation process. A method for producing raw hides, characterized in that the finished raw hides are subjected to a stretching drying process such as boarding or netting. 4. A preparatory step is performed on the raw hide, ie, a watering step, a backing step, a calcifying step, and a demineralizing step.
A formic acid treatment step is performed on the ready-prepared raw hide that has completed this preparation step, and the formic acid-completed raw hide is subjected to a board-drying step, such as a net-covering, and further, a draining step and a draining step are performed. A method for producing rawhide, characterized in that an appropriate amount of glycerin is impregnated, and the raw leather impregnated with glycerin is subjected to a stretching and drying process such as boarding and netting. 5. A preparation process, ie, a rinsing process, a backing process, a calcifying process, and a decalcification process, which are performed on the raw hide of the cow skin, and a formic acid treatment process is performed on the ready-prepared raw hide after completing the preparation process. The finished raw skin is subjected to a stretching drying process such as boarding, netting, etc., followed by a water return step and a draining step, and an appropriate amount of glycerin is impregnated into the drained skin, and the raw leather impregnated with glycerin is again boarded and netted. A method for producing rawhide characterized by performing a tension drying process such as 6. A preparation process, ie, a watering process, a backing process, a calcifying process, and a decalcification process, which are performed on the raw skin of goatskin, and a formic acid treatment process is performed on the preparation-completed raw skin which has completed the preparation process. Applying a drying process such as boarding, netting, etc. on the finished skin, performing a draining step and a draining step, soaking an appropriate amount of glycerin into the drained skin, and again boarding the glycerin-soaked skin, A method for producing rawhide characterized by performing a tension drying process such as tensioning. 7. The method for producing rawhide according to claim 4, wherein the raw hide after impregnated with glycerin is subjected to a cutting step of forming a thin string.