KR101096605B1 - Preparation method of fluorescence natural leather - Google Patents

Abstract

The present invention is a fluorescent dye of various colors using a fluorescent dye and a fluorescent coloring aid in the dyeing process of pickle pelt treated with a non-chrome tanning agent during tanning in the oil process of the conventional natural leather manufacturing process The present invention relates to a method for producing a fluorescent natural leather, characterized by imparting a characteristic to express a color. The process is simplified because it does not undergo a process for producing a fluorescent color separately from a manufacturing process of a natural leather having a fluorescent color. The use of non-chromium tanning agent is an eco-friendly method that eliminates the generation of hexavalent chromium, and in particular, dyeing fluorescent dyes on pickle pelts during the dyeing process, and thus the binding force between the leather tissue and the dye. To improve the properties of daylight fastness, washing fastness, leveling, etc. as well as fluorescent under ultraviolet (UV) light source It is expected to greatly increase the demand because it can be used for shoes, bags, accessories, and clothing because of its excellent fluorescence property.

Natural Leather, Fluorescent, Pickle Pelt, Non-Chromium Tanning Agent, Dye, Oily Process, Dyeing Process

Description

Preparation method of fluorescence natural leather

The present invention relates to a method for manufacturing a fluorescent leather, and more particularly, in the dyeing process pickled pelt treated with a non-chrome tanning agent during the tanning process in the oil-based process of the conventional natural leather manufacturing process By using fluorescent dyes and fluorescent coloring aids to give the characteristic to express a variety of fluorescent colors, unlike conventional natural leather, characteristics such as fluorescence and color fastness is improved, and using non-chromium tanning agent is an eco-friendly construction method It relates to a method for producing a fluorescent natural leather.

Generally, leather is used not only for clothing but also for various purposes such as bags, accessories, and the like. Products used for the above uses are required for leather materials of various colors for various fashion senses to express individuality. In order to dye the leather with this color, leather companies have used synthetic dyes to simply give the color to the leather as a dye mainly used in the dyeing process. The development level of the leather material to meet the demand is still insufficient.

In order to meet the demands of consumers who want leather products with various fashion senses, the leather industry has manufactured leather materials with various colors by using pigments of color with higher saturation and brightness than conventional colors. The technique for coloring the leather cannot be applied in the dyeing process, and in the meantime, the fluorescent pigment should be treated by the coating process such as spraying, padding, roll coating, and film adhesion. The problem of degrading the merchandise of the leather products is frequently caused by the very complicated process and low fastness.

As a technology developed to solve the above problems, the method of imparting fluorescence to leather, domestic registered utility model publication No. 0018927 (announced on 15 May 2002) and domestic registered patent publication No. 0336104 (2002) 4. 27 Registration) is a method of manufacturing light-emitting leather, which is coated with crust leather, which is completed by the conventional method of manufacturing leather, and has a fluorescence, luminous and photoluminescent effect in the secondary base coating process. A method of treating inorganic chemicals followed by final coating is proposed, and Korean Patent Publication No. 0364147 discloses a method of applying a photoluminescent pigment to the surface of a textile material through a screen printing method. In this case, the manufacturing process is complicated because the process of attaching a separate fluorescent material is complicated, and a synthetic binder is used to attach the leather fabric. Problems such as deterioration of physical properties such as durability and color fastness due to the forced attachment method.

Accordingly, the present invention for solving the above problems is a non-chrome tanning agents such as aluminum, aldehydes, zirconium during tanning in the planetary process, which is a conventional process for producing natural leather In the process of dyeing the pickled pelt using Rhodamine fluorescence dye in the dyeing process to produce natural leather, compared to the manufacturing process of natural leather having a conventional color Since it does not go through the process for producing fluorescent color, the process is simplified, and the manufacturing method of the fluorescent natural leather is characterized in that it is possible to manufacture natural leather with high durability and fastness by increasing the bonding strength between the fluorescent dye and leather. It is a task.

As described above, the fluorescent natural leather manufactured according to the present invention improves the functional and physical properties such as fluorescent, laundry resistance, and abrasion resistance, thereby increasing the added value of the product by using the product in various shoes, bags, accessories, and the like. Is characteristic.

In the present invention for achieving the above object in the production method of natural leather,

An oil-based process for manufacturing non-chrome tanning agent during tanning on pickled pelts which have been prepared using raw materials;

A dyeing process of retanning the non-chrome tanning pickled skin using a non-chrome tanning agent, and then applying a color using a fluorescent dye and a fluorescent coloring aid;

The manufacturing method of the fluorescent natural leather characterized by being manufactured through the above is made into a problem solving means.

However, the planetary process is treated by using 6 to 12 parts by weight of non-chromium tanning agent with respect to 100 parts by weight of pickle pelt during tanning treatment,

The non-chromium tanning agent is used by selecting one or more of the non-chromium tanning agent such as aldehyde, aluminum, zirconium, titanium or phosphate,

The dyeing process is based on 100 parts by weight of pickle pelt, 0.1 to 20 parts by weight of a fluorescent dye, 0.1 to 20 parts by weight of a fluorescent color adjuvant, 1 to 20 parts by weight of branching agent, 0.1 to 1.5 parts by weight of a fixing agent, 40 Staining treatment by rotating at 60 ~ 180 minutes at a drum rotation speed of 8 ~ 15 rpm at a temperature of ~ 60 ℃ dyeing process to maintain a pH of 3.8 ~ 4.0 after the final fixing,

The fluorescent dye is used by dissolving 0.1 to 0.2% by weight of Rhodamine-based fluorescent dye in 99.8 to 99.9% by weight of alcohol,

The fluorescent color adjuvant is selected from one or more of stilbene, Curin, Curazol, Pyrazolone, Imidazol or Oxazol. ,

The alcohol is preferably used by selecting one or more of ethanol (Ethanol), methanol (Methanol) or propanol (Propanol).

The present invention by the above-mentioned means for solving the problem is pickled pelt (Pickle pelt) treated using non-chrome tanning agents during tanning (Tanning) in the conventional process for producing natural leather In the dyeing process, Rhodamine fluorescence dye is used to manufacture fluorescent natural leather, which simplifies the process because it does not go through the process of producing fluorescence color separately from the manufacturing process of natural leather with fluorescent color. As a non-chrome tanning agent is used, it is characterized by an environmentally friendly method that eliminates the generation of hexavalent chromium.

In particular, the present invention, by dyeing the fluorescent dye in the raw material during the dyeing process to enhance the binding force between the leather tissue and the dye not only excellent in the properties of daylight fastness, washing fastness, leveling, etc., but also fluorescent under ultraviolet (UV) light source It is expected that demand for demand will increase significantly due to its excellent luminescent properties, which can be used for shoes, bags, accessories, and clothing.

In order to achieve the above effects, the present invention relates to a method for producing a fluorescent natural leather, which will be described in detail below with reference to a preferred embodiment of the present invention, in the following description, only the parts necessary for understanding the present invention are described. It should be noted that descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

Hereinafter, the method for producing a fluorescent natural leather according to the present invention in detail as follows.

The present invention is a method for producing natural leather,

An oil-based process for manufacturing non-chrome tanning agents during tanning on pickled pelts that have been prepared using raw skins;

A dyeing process of retanning the non-chrome tanning pickled skin using a non-chrome tanning agent, and then applying a color using a fluorescent dye and a fluorescent coloring aid;

It relates to a method for producing a fluorescent natural leather, characterized in that it is produced through a method for producing a fluorescent natural leather.

The characteristics of the present invention is prepared from the manufacturing process of natural leather, which is prepared through conventional process such as preparation process, oily process, dyeing process and coating process using raw materials such as cow, pig, sheep, etc. used in the present invention. Pickle pelt, which has undergone the process up to the process, is pickled by non-chrome tanning, then dyed with fluorescence dye and dried to carry out the fluorescence process. To produce a natural leather that emits.

When the conventional natural leather manufacturing process as described above is subdivided into each process, the preparation process is a process of soaking, lime, deliming, betting and pickling, and the oil process is a process of tanning. The dyeing process is made of natural leather through a complex process of retanning, neutralization, fatliquoring, dyeing and drying.

In the manufacturing method of the natural leather, the preparatory process is treated with raw salt in salt water treatment to replenish the lost water, alkali treatment to remove the hair, lime treatment to remove the input lime, deliming treatment, leather proteinase It is a process of betting (bating) to increase the elongation and yield, and the pickling treatment to uniformly add the tanning agent by adjusting the leather to acid.

And the oiliness process is a process of imparting mineral properties to animals for commercialization of leather and includes a tanning treatment to impart heat resistance and flexibility.

In addition, the dyeing process is difficult to obtain a thin and filling leather when dried with tanning agent alone, and the pH is increased to facilitate the penetration of dyes, briquettes, and oils, as well as retanning treatment to give flexibility, elasticity, and filling feeling of leather. Is a process including neutralization treatment, eggplant treatment, and drying treatment to give flexibility and elasticity to the step of matching the dye.

In the manufacturing method of the fluorescent natural leather according to the present invention, the tanning treatment during the oiliness process is preferably performed using 6 to 12 parts by weight of the tanning agent based on 100 parts by weight of pickled pelt.

When the amount of the tanning agent is less than 6 parts by weight, it does not enhance the filling and density of the leather does not provide sufficient heat resistance and flexibility, and when the amount of the tanning agent exceeds 12 parts by weight, As a result, an increase in the manufacturing cost and the components that are not combined with leather may leak into the wastewater, causing environmental pollution.

In the dyeing process, the retanning treatment is preferably performed using 6 to 12 parts by weight of tanning agent based on 100 parts by weight of pickle pelt.

When the amount of tanning agent is less than 6 parts by weight, the uniformity of the tanning agent for each part of the manufactured natural leather is weakened, the physical properties are weakened, and the dyeing property is poor when dyeing, and when the amount is more than 12 parts by weight, There is a concern that excessively hardened and the manufacturing cost increases due to excessive use of the tanning agent, and the leather and the unbound components flow out into the wastewater, causing environmental pollution.

The tanning agent used in the tanning or retanning treatment is a conventional non-chromium tanning agent except for chromium, and one or more selected from compounds such as aldehyde, aluminum, zirconium, titanium or phosphate. It is preferable to use.

As such, the present invention excludes the use of chromium in the tanning process, which converts the protein of the animal state into the mineral state in the manufacturing process of grain leather and split leather. Non-chrome) is applied to the tanning process, which is an eco-friendly method that eliminates the generation of chromium hexavalent.

In addition, the present invention is characterized by dyeing by applying a fluorescent dye in the dyeing process in order to impart fluorescence to the leather, such as retinning.

In the present invention, the dyeing process is based on 100 parts by weight of pickle pelt, 0.1 to 20 parts by weight of a fluorescent dye, 0.1 to 20 parts by weight of a fluorescent color aid, 1 to 20 parts by weight of branching agent, 0.1 to 1.5 parts by weight of a fixing agent It is preferable to perform dyeing so that the pH is maintained at 3.8 to 4.0 after final fixing while rotating the dyeing process for 60 to 180 minutes at a drum rotational speed of 8 to 15 rpm at a temperature of 40 to 60 ℃.

Fluorescent dye used in the present invention has a high fluorescence in the presence of ultraviolet (UV) light source by using a rhodamine-based fluorescent dye to give a variety of colors to suit the needs of consumers in the dyeing process And it has the fastness has the advantage of producing high value-added leather products.

When the amount of the rhodamine-based fluorescent dye is less than 0.1 part by weight, it is not possible to give an even color to the entire natural leather, and the color is light, so that the surface of the leather may not be exposed and sufficient fluorescence may be exhibited. If the amount is more than 20 parts by weight, unbound dye is eluted into the waste water, causing environmental pollution and the problem of deterioration in profitability due to overuse of the drug.

Rhodamine-based fluorescent dyes that can be used in the present invention are Rhodamine B and derivatives of Rhodamine B, in addition to organic pigments such as Rhodamine B toner, Rhodamine B Lake, Rhodamine 6G Toner, Rhodamine 6G Lake, Basic dyes such as rhodamine G and rhodamine 6 GCP.

In addition, the rhodamine-based fluorescent dye used in the present invention uses a fluorescent dye dissolved in alcohol, 0.1 to 0.2% by weight of the rhodamine-based fluorescent dye dissolved in 99.8 to 99.9% by weight alcohol It is preferable.

In the present invention, when the amount of rhodamine-based fluorescent dye dissolved in alcohol is less than 0.1% by weight, the fluorescent color may not be clearly expressed in the fabric of dyed natural leather, and rhodamine ( If the amount of Rhodamine-based fluorescent dyes exceeds 0.2% by weight, too strong fluorescent color is expressed, which may cause a loss of fashion sense required by consumers.

In the present invention, the alcohol that is a solvent for dissolving Rhodamine-based fluorescent dyes is preferably used by selecting one or more of ethanol, methanol (Methanol) or propanol (Propanol).

In addition, the fluorescent color adjuvant used in the present invention may be one or more of stilbene, curin, Cumarine, pyrazolone, imidazol, or oxazole. It is preferable to select and use.

If the amount of the fluorescent aid is less than 0.1 parts by weight can not exhibit a sufficient effect as a fluorescent aid, if the amount of the color aid is more than 20 parts by weight of leather becomes excessively hard, the color adjuvant is unevenly coupled to the leather surface Therefore, when the fluorescent color is generated, a problem of uneven color is generated.

In the present invention, when the amount of branching agent is less than 1 part by weight, the natural leather becomes too hard to perform subsequent work. When the amount of the branching agent is more than 20 parts by weight, the branching agent is excessively adsorbed on the surface of the leather, such as shoes, bags, etc. Problems such as poor adhesion in the manufacturing process will occur.

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.

Fixing agent used in the present invention improves the binding strength of the fluorescent dye and leather fabric to improve the fastness of the fluorescent dye, and serves to prevent the color change of the dyeing. When the amount of the fixing agent is less than 0.1 part by weight, the dyeing fastness characteristics of the fluorescent dye may be deteriorated, and when the amount of the fixing agent is more than 1.5 parts by weight, the combined dye and the drug may be eluted again.

And the fixing agent usable in the present invention is preferably used by selecting one or more types of formic acid (formic acid) or cationic surfactant which is usually used in the dyeing process of natural leather.

In the dyeing process according to the present invention, the process conditions for dyeing pickle pelts may be improper dyeing of fluorescent dyes or stains on natural leather when the process conditions deviate from the above limited process conditions.

According to the present invention, the leather manufactured by the method of manufacturing the fluorescent natural leather as described above is characterized in that it is excellent in the fluorescence and durability of the effect of leather for tanning, retanning and fluorescent dyeing and then suitable for fashion materials.

And fluorescent natural leather according to the present invention will be applicable to a variety of applications, such as shoes, bags, handbags, interior materials, accessories, clothing.

Hereinafter will be described in detail based on the preferred embodiment of the present invention, the present invention is not limited by the embodiment.

1. Manufacture of Fluorescent Natural Leather

(Example 1)

Tanning is carried out using 6 parts by weight of aluminum tanning agent, which is a non-chrome tanning agent, and 3 parts by weight of aldehyde tanning agent, based on 100 parts by weight of pickle pelt in the planetary process, and then aluminum tanning in the retanning process. Leather was prepared by retanning treatment using 6 parts by weight of ning agent.

3 parts by weight of a rhodamine-based fluorescent dye dissolved in methanol at a concentration of 0.1% by weight based on 100 parts by weight of pickled pelt prepared by the above method in the dyeing process 10 parts by weight of the solution was rotated for 180 minutes at a drum rotation speed of 12 rpm at a temperature of 50 ° C., dyeing was carried out, 1.0 parts by weight of the fixing agent was added and the final fixing pH was maintained at 4.0, followed by drying at 60 ° C. for 12 hours to produce fluorescent natural. Leather was prepared.

(Example 2)

To prepare a natural leather retanned by the same method as in Example 1, in the present Example 2 with respect to 100 parts by weight of pickled pelt (Pickle pelt) prepared by the above method in a dyeing process, the concentration of 0.1% by weight 3 parts by weight of Rhodamine-based fluorescent dye dissolved in methanol, 3 parts by weight of a fluorescent coloring assistant, 10 parts by weight of eggplant, and rotated at a temperature of 50 ° C. at a drum rotation speed of 12 rpm for 180 minutes. After dyeing, 1.0 parts by weight of fixing agent was added and final fixing pH was maintained at 4.0, and drying was performed at 60 ° C. for 12 hours to prepare fluorescent natural leather.

(Comparative Example 1)

In Example 1, a leather applied with zinc sulfide (ZnS) inorganic fluorescent pigments in a coating process was used as Comparative Example 1 as a control, except for the dyeing process using a fluorescent dye.

2. Evaluation of Properties of Fluorescent Leather

Using the fluorescent leather of Examples 1, 2 and Comparative Example 1 described above, the results of measuring physical properties such as fluorescence, light fastness and washing resistance are shown in Table 1 below.

Evaluation item Example 1 Example 2 Comparative Example 1 Analysis method fluorescence B A B Sensory evaluation Light fastness 3-4 grade 3-4 grade 1-2 grade ASTM D 1148 Laundry resistance B A C Sensory evaluation

* Classifier

Fluorescence (Sensory Test): A = Good, B = Good, C = Bad

-Laundry resistance (Sensory test): Fluorescence sensory test after 10 tests of washing fastness according to ASTM D 2096 test method: A = excellent, B = good, C = bad

As shown in Table 1, the fluorescent leathers prepared in Examples 1 and 2 were all excellent in fluorescence, light fastness and washing resistance as compared to Comparative Example 1.

In addition, when the fluorescence development aid of Example 2 was used, it showed better fluorescence and laundry resistance than Example 1.

Therefore, the present invention is manufactured by applying a fluorescent dye to the dyeing process of natural leather so as to be suitable for fashion leather material, it is expected to be utilized as a versatile shoe, bag, clothing, etc. excellent in fluorescence, daylight fastness and washing resistance do.

As described above, the manufacturing method of the fluorescent natural leather according to the present invention has been described through the above preferred embodiments, and the superiority thereof has been confirmed, but those skilled in the art will recognize the spirit and scope of the present invention described in the following claims. It will be understood that various modifications and variations can be made in the present invention without departing from the scope thereof.

Claims (6)

In the manufacturing method of natural leather, An oil process for producing a non-chrome tanning agent during tanning after a preparatory process using pickled pelt; A dyeing process of retanning the non-chrome tanning pickled skin using a non-chrome tanning agent, and then applying a color using a fluorescent dye and a fluorescent coloring aid; Method for producing a fluorescent natural leather, characterized in that is produced through. The method of claim 1, The tanning treatment and the retanning treatment are performed using 6-12 parts by weight of non-chromium tanning agent based on 100 parts by weight of pickle pelt, respectively. The non-chromium tanning agent is a method for producing a fluorescent natural leather, characterized in that one or more selected from non-chromium tanning agents such as aldehyde, aluminum, zirconium, titanium or phosphate. The method of claim 1, The dyeing process is based on 100 parts by weight of pickle pelt, 0.1 to 20 parts by weight of a fluorescent dye, 0.1 to 20 parts by weight of a fluorescent color adjuvant, 1 to 20 parts by weight of branching agent, 0.1 to 1.5 parts by weight of a fixing agent, 40 Method of producing a fluorescent natural leather, characterized in that the dyeing treatment so that the pH is maintained at 3.8 ~ 4.0 after the final fixing while rotating by 60 to 180 minutes at a drum rotation speed of 8 ~ 15 rpm at a temperature of ~ 60 ℃. The method of claim 3, The fluorescent dye is a method for producing a fluorescent natural leather, characterized in that 0.1 to 0.2% by weight of Rhodamine-based fluorescent dye dissolved in 99.8 to 99.9% by weight alcohol. The method of claim 3, The fluorescent adjuvant is selected from the group consisting of stilbene, curin, Cumarine, pyrazolone, imidazole, or oxazole. Method for producing a fluorescent natural leather, characterized in that. The method of claim 4, wherein The alcohol is a method of producing a fluorescent natural leather, characterized in that used by selecting one or more of ethanol (Ethanol), methanol (Methanol) or propanol (Propanol).