JP2004197015A - Tanned leather, leather goods produced by using the same and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tanned leather subjected to tanning treatment, leather goods produced by using the tanned leather and a method for producing the tanned leather, especially tanned leather having various texture and appearance, leather goods produced from the leather and a method for producing the tanned leather. <P>SOLUTION: The tanned leather is produced by performing a shaping process such as cutting and punching of a tanned crust and imparting the product with three-dimensional shape and/or fluffing e.g. by additional tanning treatment. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tanned leather, a leather product using the same, and a method of manufacturing the same, and more particularly, to a leather having a unique texture and expression, a leather product using the same, and a method of manufacturing the same.
[0002]
[Prior art]
The tanned leather is a material that tans leather, such as cows, horses, pigs, and reptiles, using a tanning agent and adds practical properties such as flexibility, toughness, and breathability depending on the application. It is used for bags, shoes, clothes, etc.
The skin of the raw material becomes a crust through a preparation process such as immersion and lining, and a tanning process, and a leather is obtained by applying a color, grease, and the like to the crust in a finishing process.
In addition, in the finishing step, a re-tanning step of performing a tanning process again may be performed for the purpose of giving flexibility before performing coloring / greasing.
The production process of the tanned leather including the re-tanning process includes, for example, one described in Patent Document 1.
[0003]
[Patent Document 1]
JP-A-8-73900
[Problems to be solved by the invention]
As described above, the leather obtained from the skin of the raw material is subsequently cut or punched to be processed into leather goods such as bags and shoes.
In the process of being processed into leather products, the leather fabric may be given a pattern or picture by punching or cutting, etc. Nothing was expressively expressed.
With the diversification of design development in recent years, it is desired to create leather products with expressive designs in order to differentiate themselves from other products.
[0005]
[Means for Solving the Problems]
The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
That is, in the first aspect, the tanned leather is obtained by further performing a process of imparting a three-dimensional shape and / or fluff to the crust that has been subjected to shaping processing such as cutting and punching after the tanning step.
[0006]
According to the second aspect, the tanned leather is obtained by performing a tanning process or a water washing process again on the crust that has been subjected to the shaping process such as cutting and punching after the tanning process.
[0007]
In claim 3, the leather product is subjected to shaping such as cutting or punching on the crust after the tanning process, and is assembled or sewn to form a leather processed product. It is obtained by performing a tanning process or a water washing process again.
[0008]
In claim 4, a step of performing shaping such as cutting or punching on the crust after the tanning, a re-tanning or washing step performed after the shaping, a coloring step and a greasing performed after the re-tanning step. And a process.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described.
FIG. 1 is a diagram showing a flow of a method of producing a leather according to the present invention, FIG. 2 is a diagram showing a change in the state of the leather in a shaping / working process and a retanning / finishing process, and FIG. FIG. 4 is a cross-sectional side view showing the unprocessed leather, FIG. 5 is a plan view showing the leather in a state where re-tanning has been performed after punching, and FIG. FIG. 7 is a cross-sectional view, FIG. 7 is a plan view showing a leather that has been cut and has not been retanned, and FIG. 8 is a plan view showing a leather that has been retanned after being cut. FIG. 9 is a diagram showing a flow of a method of producing leather in a case where leather that has undergone shaping and processing steps is cut and sewn to obtain a leather processed product and then retanning is performed. FIG. The state of re-tanning the processed leather product Diagram showing, FIG. 11 is a perspective view showing a bag obtained by applying the re-tanning process after the form of the bag and cut-NuiNaru leather.
[0010]
A method of manufacturing a leather in the present invention will be described.
As shown in FIG. 1, the method for producing a leather according to the present invention roughly includes a preparation step A, a tanning step B, a shaping / processing step C, and a retanning / finishing step D.
In the preparation step A, first, soaking is performed (S01). In the soaking process, the raw hides that have been salted for preservation are soaked in water to remove salt contained therein and dirt attached to the surface.
[0011]
Next, freshing is performed (S02). In the freshening process, the fat meat adhering to the back surface of the skin is scraped by a backing machine.
Thereafter, liming and hair removal are performed (S03). Liming is also called lime pickling, in which soaked skin is dipped into a milky liquid obtained by adding sodium sulfide to a supersaturated aqueous solution of lime. The purpose of this operation is to loosen the roots by the action of alkali, to swell the skin and to loosen individual fibers.
Depilation is performed by using a hair remover on the skin with loose roots by freshening.
[0012]
After the preparation step A is completed, the leather enters a tanning step B.
There are many types of tanning such as tanning and chrome tanning, but in the tanning step B of this example, tanning is performed (S04).
In tannin tanning, the skin after the preparation step A is put into a tank containing a tannin solution and shaken to gradually infiltrate the tannin from the front (silver surface) and the back (meat surface) of the skin, and finally All the way through.
[0013]
By drying the leather after the tanning step B, “crust” is obtained. In the present invention, the crust is then subjected to a shaping / processing step C.
In the shaping / processing step C, first, the crust is put into a drum and softened (S05). The crust is subjected to a punching process or a cutting process to cut off the silver side according to the finally manufactured leather product, and in some cases, is cut according to the mold (S06), and shaped.・ Process. The holes and cut portions to be processed at this time are portions that become the final pattern, pattern, etc. of the leather product.
[0014]
The crust that has gone through the shaping / processing step C enters the retanning / finishing step D, where tannin is tanned again (S07).
After the re-tanning is completed, the color is added and oil is added to the oil to grease the color, and the color is fixed and the depth is obtained (S08). After finishing the coloring and fatting, it is dried naturally.
After the re-tanning / finishing process D, a tanned leather is obtained. The re-tanned leather is cut and sewn in accordance with the mold to produce the final leather product.
[0015]
FIG. 2 shows changes in the state of the leather in the shaping / processing step C and the re-tanning / finishing step D among these steps.
FIG. 2 (a) shows the leather (crust) 1 which has been finished (S05). When punching and cutting are performed on the leather (crust) 1, the punched hole 11 is made as shown in FIG. 2 (b). And the cutting part 12 is formed.
As shown in FIG. 2 (c), when the leather 1 having been subjected to the punching / cutting processing is tanned again to form a tanned leather 1 ', the punched hole 11' and the peripheral edges 11a 'and 12a' of the cut portion 12 'have a silver surface. It turns to the side and presents a three-dimensional expression.
[0016]
That is, as shown in FIGS. 3 and 4, the periphery 11 a of the punched hole 11 in the leather 1 that has not been retanned is planar, and all the punched holes 11 have a uniform expression. At the time of punching, only a slight inward portion is formed in the peripheral portion 11a on the grain side.
[0017]
On the other hand, as shown in FIGS. 5 and 6, the periphery 11a 'of the punched hole 11' in the leather 1 'obtained by performing the re-tanning process on the leather 1 is warped to the grain side and swelled. Becomes a three-dimensional expression.
This state of warping and swelling is not uniform because the raw material of the leather 1 'is a natural product, and the manner in which the tanning agent acts on the peripheral edge 11a of the punched hole 11' is different in each part. Each of the punched holes 11 'is slightly different.
[0018]
In addition, the flesh side of the leather 1 that has not been re-tanned has little fluff, but as shown in FIG. 6, the leather 1 'obtained by re-tanning has a fluffy state. Has become.
In this way, the peripheral portion 11a 'is warped to the silver side and the flesh side is fluffy, so that even a new leather cloth or a new leather product made of this leather can be used for a considerable period of time. It is supposed to create a texture that has been used.
[0019]
Also, as shown in FIG. 7, the cut portion 12 of the leather 1 which is not re-tanned has a pale expression with a simple cut, but as shown in FIG. In the case where the cutting is performed, the periphery 12a 'of the cutting portion 12' is raised and the cut end is widened, and the inside of the cutting portion 12 'is fluffed, giving a unique texture.
[0020]
In this way, the re-tanned leather 1 'is finished in a leather cloth with depth, which has three-dimensional and different parts, and has irregular changes and expressions.
As a result, it is possible to impart a unique texture and expression with a unique depth to a leather product manufactured using the leather fabric, thereby increasing the value of the leather fabric and the leather product.
[0021]
When a leather product is manufactured from the tanned leather 1 'having undergone the re-tanning step, as shown in FIG. 9, the leather 1 punched and cut in the shaping / processing step C is cut into a predetermined shape. A finished leather product can be obtained by forming a leather processed product by sewing or assembling, and then performing re-tanning, coloring, and fattening.
[0022]
As an example of a case where retanning is performed in a process as shown in FIG. 9, for example, as shown in FIG. 10, retanning is performed on a leather processed product in a state where the leather 1 cut into a belt shape is assembled in the process. The edge of each band-shaped leather 1 'warps to the silver side, and the fluff is generated on the flesh side, giving the leather a unique look that feels like it has been used for a considerable period of time. Can be finished.
[0023]
As shown in FIG. 11, when a bag 51 is formed as a leather product, in which petals are represented by punching holes 11 ′ formed on the side surface, the leather 1 is finished after the punching process in the shaping / processing step C in FIG. 9. Is cut and sewn to form the shape of the bag 51, and re-tanning is performed, so that the peripheral portion 11a 'of the punching hole 11' constituting the petal is warped to the silver surface side, that is, the surface side of the bag 51. And a three-dimensional expression.
As a result, the bag 51 has a unique texture, and has a three-dimensional shape and a different expression that varies from part to part, and the bag 51 has a deep pattern or picture.
As a result, it is possible to give the bag 51 a unique texture and expression with a unique depth, and the value of the bag 51 can be increased.
[0024]
As described above, after performing a shaping process such as punching on the tanned leather 1 or after processing the leather 1 into a leather processed product, the retanning process (S07) is performed to obtain a unique texture and the like. Although a facial expression can be provided, a similar texture and facial expression can be provided by performing a washing process or the like instead of the re-tanning process (S07).
[0025]
That is, when the leather 1 that has been subjected to the shaping processing such as punching or the leather processed article that has been processed by sewing the leather 1 is washed with water, washing water, or the like, and then subjected to the re-tanning processing. The same texture and facial expression can be provided.
In addition to the washing with water or washing water, the three-dimensional shape and / or fluffing of the leather 1 subjected to shaping such as cutting and punching after the tanning process and the leather processed product obtained by processing the leather 1 are further performed. The same texture and facial expression can also be provided by performing the process of giving
[0026]
However, in the case where a water washing treatment or the like is performed instead of the re-tanning, the obtained leather 1 ′ tends to be hard or easily cracked as compared with the case where the re-tanning is performed. It should be noted that the quality of the leather 1 'tends to be poor as described above.
[0027]
Note that the three-dimensional shape and the fluff obtained by the re-tanning do not naturally return to the original state (a flat and fluff-free state before the re-tanning is performed). However, the three-dimensional shape obtained by the re-tanning process by using or washing the leather products such as the bag 51 made using the tanned leather 1 'and the tanned leather 1' after the re-tanning is performed. The appearance of the shape and fluff changes.
In other words, the original three-dimensional shape and fluffiness are combined with the change in the expression of the leather 1 'due to use and the like, so that a better texture is produced.
[0028]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
As described in claim 1, the crust that has been subjected to shaping processing such as cutting or punching after the tanning step can be obtained by further performing a process of imparting a three-dimensional shape and / or fluff.
The leather can be finished in a deep leather fabric with three-dimensional and different parts, with irregular changes and expressions.
As a result, it is possible to impart a unique texture and expression with a unique depth to the leather cloth, and it is possible to enhance the value of the leather cloth.
[0029]
As described in claim 2, the tanned leather is obtained by performing a tanning process again or performing a water washing process on the crust that has been subjected to shaping processing such as cutting and punching after the tanning process.
The leather can be finished in a deep leather fabric with three-dimensional and different parts, with irregular changes and expressions.
As a result, it is possible to impart a unique texture and expression with a unique depth to the leather cloth, and it is possible to enhance the value of the leather cloth.
[0030]
As described in claim 3, the crust after the tanning step is subjected to shaping such as cutting and punching, and is assembled or sewn to form a leather processed product, and the leather processed product is tanned again. As it is obtained by performing processing or washing processing,
The leather products have a unique texture, three-dimensional and differing from part to part, exhibiting distorted changes and facial expressions, and finished in leather goods with deep patterns and pictures.
This makes it possible to give the leather product a unique texture and expression with a unique depth, and enhance the value of the leather product.
[0031]
As described in claim 4, a step of performing shaping processing such as cutting or punching on the crust that has been tanned, a re-tanning step or a washing step performed after the shaping processing, a coloring step performed after the re-tanning step, and a heating step. Since it has a fat step,
The tanned leather obtained by this tanning method is finished in a tanned leather fabric having a three-dimensional shape and different parts, having a distorted change and expression.
As a result, it is possible to impart a unique texture and expression with a unique depth to a leather product manufactured using the leather fabric, thereby increasing the value of the leather fabric and the leather product.
[Brief description of the drawings]
FIG. 1 is a diagram showing a flow of a method for producing a leather of the present invention.
FIG. 2 is a diagram showing changes in the state of leather in a shaping / processing step and a retanning / finishing step.
FIG. 3 is a plan view showing a leather that has been subjected to punching and has not been re-tanned.
FIG. 4 is a side sectional view of the same.
FIG. 5 is a plan view showing the leather in a state where retanning has been performed after punching has been performed.
FIG. 6 is a side sectional view of the same.
FIG. 7 is a plan view showing a leather that has been subjected to a cutting process and has not been re-tanned.
FIG. 8 is a plan view showing the leather in a state where re-tanning has been performed after cutting has been performed.
FIG. 9 is a diagram showing a flow of a method of manufacturing leather in a case where leather that has undergone shaping and processing steps is cut and sewn to obtain a leather processed product and then retanning is performed.
FIG. 10 is a view showing a state in which a leather processed product in a state where leather cut into a belt shape has been assembled in the process has been re-tanned.
FIG. 11 is a perspective view showing a bag obtained by cutting and sewing leather to form a bag and then performing a re-tanning process.
[Explanation of symbols]
1 leather (crust)
1 'Tanned leather (re-tanned) 11 Punched hole 12 Cut part

Claims (4)

A tanned leather obtained by performing a process of imparting a three-dimensional shape and / or fluff to a crust that has been subjected to shaping processing such as cutting or punching after a tanning step. The tanning leather, wherein the tanning leather is obtained by performing a tanning process or a water washing process again on the crust that has been subjected to shaping processing such as cutting or punching after the tanning step. The crust after the tanning process is subjected to shaping such as cutting and punching, and is assembled or sewn to form a leather processed product, and the leather processed product is tanned again or washed with water. A leather product using a leather, which is obtained by performing. Having a step of performing shaping processing such as cutting and punching on the crust after the tanning processing, a re-tanning step or a washing step performed after the shaping processing, and a coloring step and a greasing step performed after the re-tanning step. A characteristic method of producing leather.

Images