KR20030041907A - manufacturing processes of leather - Google Patents

Abstract

PURPOSE: A method for processing leather is provided, to improve the durability of leather by the laminating process and to obtain various types of leather such as normal type and embossing type. CONSTITUTION: The method comprises further the laminating process comprising splitting leather to obtain a desired thickness; placing cloth on the upper roller of a laminating apparatus, covering a vinyl on the upper side of a lower roller, placing the split leather on the vinyl, and pressing the back side of the leather with heating by using the upper and lower rollers to blend the cloth and the leather; and trimming the blended cloth, besides the common manufacturing processes of leather. Preferably the cloth is provided to the roller with a velocity of 3 m per min and is heated at a temperature of 80-100 deg.C. The leather can be shaped into the embossed one by the coating process using an embossed press.

Description

Manufacturing processes of leather

The present invention relates to a process of processing leather, in particular a fabrication process and a process for producing various types of leather.

In general, if raw materials are used as they are, they are easily decayed. Therefore, a multi-step processing process is required. Hereinafter, a brief description will be made of a process in which the hide is processed into leather.

As a first step, when raw hide arrives at the place of origin, various sterilization treatments are carried out while loaded in a container. Transfer the discarded raw hides to the warehouse.

Transferred raw hides go through a soaking process, which removes dirt, salts, etc. from the raw hides, and absorbs water to soften it. Subsequently, the soaked raw hides are treated with lime to remove the hairs of raw hides, fleshing (fleshing) to physically remove the fat from raw hides, and screening to determine the grade of the grain according to the application. The sorting process is performed continuously.

The next process is to go through the deliming process of removing the lime penetrated into the raw skin through the process of the lime needle using the eye and salt eye. The drum is used from the deliming process.

After the deliming process, the unnecessary protein layer (collagen) is hydrolyzed with proteolytic enzymes to clean the silver surface of the leather and undergo a bating process to impart elongation.

In the next step, tanning process is carried out to reduce the acidity of the leather with formic acid and sulfuric acid to facilitate the penetration of chromium. Pickled leather is subjected to the tanning process, which mainly uses chromium. Leather emulsified by chromium is converted from animal leather to mineral leather. Unlike pelts, it has a unique wet blue color and is soft, flexible, non-corrosive, long-term storage, heat resistant and dry. It is one of the most important stages in the leather tanning process because it does not harden protein.

The tanned leather is used to determine the grade of silver according to the use and to adjust the water content to 45 to 50% to control the moisture to smooth the shaving. It goes through a shaving process.

After the process, the dyeing process is followed by a retanning process, in which the chromium is re-added to compensate for the irregularities of the chromium distribution in the tanning process and other emulsions (such as charcoal or vegetable) are made according to the consumer's preference. Tanning) is a process of making leather with a wide variety of physical properties depending on the application.

After the re-emulsion process is a state that lacks aesthetic sense, it undergoes a dyeing process to give a variety of basic colors.

After the dyeing process is subjected to a fatliquoring process to add the oil to improve the texture of the leather and increase the flexibility. The use of the drum up to the above-described process is completed.

After the eggplant process, drying for removing moisture and wrinkles, vibration staking process to relax the fiber structure of leather, and after drying the leather after humidification and leaving it for about a day to mature, and then giving a soft touch. In the process of tanning (milling) for a long time and the final area of the dry leather, toggling process is used to smooth the leather to make painting easier.

After the process, the coating process is performed with dyes, pigments, binders, etc. to remove scratches on the surface of the leather. After the coating process, a finishing process is performed to refine the surface and improve surface gloss.

Leather, which has undergone the tanning process as described above, will be released for various uses according to the needs of consumers. If the leather that has undergone the tanning process is used as it is in clothing, shoes, furniture, etc., the skin directly touches the leather's inner skin, so the leather is easily contaminated by sweat or discharge from the skin, reducing the durability of the product. Because the feel of a material is not soft, there is a problem that wear is not good when I wear clothes. In addition, it is necessary to combine the fabric of the lining of the leather in order to construct a variety of colors and materials of the lining, and for room temperature and moisture proof.

In addition, it is necessary to emboss various types of embossing on the surface of leather in order to keep up with the tastes of consumers in the modern society together with the overlapping process.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and to solve the above problems, and to improve the durability of the leather by the overlapping process in the process of processing the leather and to provide various types of leather, that is, normal type and embo type leather. Aim

The present invention for achieving the object as described above, in the processing step of the leather consisting of a tanning process, a coating process, a finishing process to produce a leather tanning, the step of splitting according to the back and the upper and lower rollers The fabric is provided by the upper roller of the mixing device and the vinyl is covered on the upper surface of the lower roller. Then, the splitted leather is placed upside down on the upper vinyl layer, and the fabric is pressed by pressing and heated by the upper and lower rollers on the back of the leather to bond the fabric. And a processing step of the leather, characterized in that it further comprises a step of forming, including a trimming step of trimming the blended fabric.

Moreover, it is preferable that the said lamination | stacking process is performed after a tanning process.

Moreover, it is preferable that the said lamination process is performed after a coating process.

In addition, the mixing step, it is preferable that the providing speed of the fabric is 3 meters per minute and is heated at 80 ℃ to 100 ℃.

In addition, the coating step is preferably characterized in that it further comprises an embo treatment step of performing embo treatment on the upper surface of the tanned leather by a press formed in the embo shape.

As a result, the leather's durability is improved by the overlapping process while the leather goes through the tanning process, the mixing process, the painting process, and the finishing process. There is an advantage to match.

Hereinafter will be described in detail with respect to the present invention.

In order to process the leather according to the present invention is first subjected to a tanning process. The tanning process involves tanning, dyeing and fatliquoring after other preparations such as washing raw hides. This process is a well-known process, and description is abbreviate | omitted.

The leather that has undergone the tanning process is subjected to the overlapping process.

The combining process is not only the leather that is tailored to the intended use of the fabric, but also the full-length leather itself, thereby eliminating the waste of the leather to improve the durability and fit of the leather. The upper roller to provide the fabric and the work plate formed on one side of the lower upper roller and the work plate on which the leather is placed and formed on one side of the work plate to provide vinyl to the lower surface of the leather and formed at the center of the lower part of the upper roller. The lower roller is configured to heat and pressurize the leather and fabric.

Therefore, before placing the leather on the work plate of the blanket device, the leather is placed on the work plate by splitting to the desired degree. The splitting process is a process of dividing into two or three layers in the case of thick leather. By adjusting the interval of the upper and lower rollers to match the thickness of the leather by the splitting process is to overlap the fabric. The adhesive is mainly used as a liquid thermoplastic adhesive that softens when the temperature reaches a predetermined temperature and then hardens again when cooled.

At this time, it is preferable to adjust the speed of the up and down rollers so that the fabric is provided at 3 meters per minute and the temperature is heated to 80 ° C to 100 ° C to be combined. This is the speed and temperature range that allows leather and fabric to adhere evenly and smoothly without adhesive marks.

After covering the vinyl on the work plate and the lower roller, the splitted leather is placed upside down on the vinyl upper layer, and the fabric is bonded by pressing and heating the upper and lower rollers on the back of the leather to bond the fabric. The reason for covering the device with vinyl is to protect the device from adhesive.

After the fabric is fabricated, the plasticization process is completed by removing the vinyl, cutting the fabric portion larger than the leather, and finishing the trimming step of trimming the unsuitable portion as the final leather in the leather.

After the lamination process, the coating process includes spraying, padding, and roll coating processes, followed by the finishing process for the modification of the leather surface and the oiliness treatment after the coating process, thereby completing the processing of leather. Detailed description is omitted here as a process of.

In addition, the overlapping process may be performed after the painting process according to the working environment and purpose of the operator.

Hereinafter, an embodiment of a processing process of leather, in particular of the normal type and embo type in the processing process of leather.

Example 1.

The normal type leather has no pattern on the top surface of the tanned leather, and in order to process the normal type leather, the tanning, dyeing and fatliquoring processes are performed after other preparations such as washing the raw skin first. Going through. The leather, which has undergone the tanning process, is subjected to the overlapping process and comprises a coating process including spraying, padding, and roll coating, and a finishing process for correcting and surface-treating the leather surface after the coating process. The processing process of type leather is completed.

Example 2.

The embo type leather has various patterns engraved on the tanned leather. In order to process the embo type leather, the embo type leather is subjected to the same tanning process as the normal type leather. After the tanning process, after the coating process including spraying, padding, and roll coating, the embo treatment is performed on the upper surface of the tanneted leather by a press having an embo shape. This is to make the embo treatment well and to prevent the embo pattern from being formed on the fabric incorporated in the leather.

The embo treatment step is followed by the same synthetic process as the leather of the normal type. After the mixing process, the finishing process of the embo leather is completed by the finishing process for the modification and the oil treatment of the leather surface.

The present invention according to the above configuration, while the leather goes through the tanning process, the mixing process, the painting process, the finishing process to improve the durability of the leather by the overlapping process, the leather of various types, that is, normal type and embo type It is effective to provide a variety of tastes of consumers by providing.

Claims (5)

In the processing process of the leather which consists of a tanning process, a coating process, and a finishing process to produce the tanned leather, The step of splitting according to the rear view, and the fabric is provided by the upper roller of the upper and lower rollers of the overlapping device and cover the vinyl on the upper surface of the lower roller and then upside down the splitted leather on the upper vinyl layer to the back of the leather Process of leather, characterized in that it further comprises a step of bonding comprising the step of bonding and pressing the fabric by pressing, heating by the upper and lower rollers, and trimming the overlapped fabric. The method of claim 1, wherein the mixing step, A leather processing step which is carried out after the tanning step. The method of claim 1, wherein the mixing step, A processing step for leather, characterized by following the coating step. The method of claim 1, wherein the mixing step, The processing speed of the leather is characterized in that the supply rate of the fabric is 3 meters per minute and heated at 80 ℃ to 100 ℃. The method of claim 1, wherein the coating step, And a embo treatment step of embossing the upper surface of the tanned leather by a press having a lower surface embossed.