KR101202250B1 - Coating method for leather goods - Google Patents

Abstract

PURPOSE: A coating method of leather products using refining painting is provided to extend life time of natural and artificial leather products. CONSTITUTION: A coating method of leather products using refining painting comprises the following stages: obtaining pure lacquer by heating lacquer and distilled water; obtaining rubber rosin by heating water and pine resin; manufacturing a first coating agent by mixing the pure lacquer and rubber rosin; obtaining extract of Galla Rhois; manufacturing as second coating agent by mixing acryl binder and urethane binder with the extract of Galla Rhois; coating the leather cloth with the coating agent; drying the leather cloth; coating the surface of the leather cloth with a second coating agent; drying the leather cloth; and evenly cleaning the leather cloth with a rice vinegar diluting solution.

Description

COATING METHOD FOR LEATHER GOODS}

The present invention is a good quality of evenly distributed small and uniform particles in raw paint while evaporating moisture by heating and stirring the raw paint filtered from dust or bark flakes, etc. To obtain a refined lacquer, mix the refined lacquer and rosin in a ratio of 5: 5 so as to uniformly mix the two, and then coat the mixture on a leather product and then 25 to 30 under a humidity of 75 to 80%. After drying for 8 hours at a temperature of ℃ ℃ relates to a coating method of a leather product using a refining coating, characterized in that the re-coated with acrylic binder, urethane binder and quinine extract.

Natural lacquer has been used as a natural paint for a long time, but it has beautiful luster and excellent touch as well as very high coating strength, durability, and waterproofness, but it causes allergies due to urushiol component that lacquer contains. Although lacquer with urushiul has been developed, urushiul causes allergies according to the constitution of humans, but it has the advantages of flame resistance, heat resistance, antiseptic, insect repellent, and insulation. There was a problem that the advantages disappear. The present invention relates to a coating method of a leather product using a leather coating agent containing a leather coating containing a urushile and a rosin and a rosin at a ratio of 5: 5. In the case of leather shoes, polished with bitumen, natural leather or artificial leather products should be rubbed frequently with leather protector or polish to give durability and prevent bacterial growth such as mold. Although it is cumbersome to apply, leather is coated with a coating agent, but most coating agents are chemicals, and their environmental and hygiene hazards are pointed out as problems.

Rhus Verniciflua Stokes is a deciduous broad-leaved arborescent tree belonging to the family Lacaceae, and it is known as the origin of the Central Asian Plateau and Himalayan region. As a kind of secretion, the bile (fresh lacquer), which has just been collected, is off-white milky milky, sweet and astringent, and turns brown when it comes into contact with air. Urushiol, the main component of bile solution, is hardened by enzyme reaction when it comes into contact with oxygen in the air, and forms a coating film which is a polymer having a three-dimensional structure uniquely with other paints.

Natural lacquer has been known to be effective in eliminating bleeding, promoting blood circulation, and insufficiency of hyperparasitic acid and gastric acid in oriental medicine.In Korea, China, Japan and other Asian countries, wooden furniture and tableware are known. Lacquer coating on the back not only forms a solid and hard film, but also has a gloss and is unchanged even after long use, and has been recognized as the best natural paint with excellent preservation and durability of wood products.

This natural lacquer has been used as a natural paint for a long time because of its high permeability, so it has very high coating strength, durability and waterproofness, beautiful gloss, excellent touch, disinfection and insecticidal effect, and lacquered wood since ancient times. If you put rice in the rice is not easily damaged because it has the effect of inhibiting the fungus, and recently, research is underway to develop a protective coating using the characteristics of the lacquer.

Pine Resin is secreted when the pine tree is damaged and is also known as Songji. It is initially a clear, colorless and transparent liquid, but over time The white solid coming out is removed and hardened. Rosin is produced in North America, producing more than 50% of the world's output, with Mexico, France, China and Indonesia. The main component of such rosin is 70-75% of resin (Rosin), 18-22% of essential oil (Tervin oil) -Turpentione, and 5-7% of water or other impurities. Regarding the effects of rosin, Shinjinbonchocho has a poor quality boil, shallow root, strong heat, deep root boil, bad swelling or stool It is said that it can cure diseases such as white itch, white and itchy scab on the head, itch, skin itch, itch and pruritus.

The gall bladder is an insect beetle caused by aphids (Aphis chinensis J. Bell) on the leaves of the Rhododendron, belonging to the family Sumac. It is distributed all over Korea. Since the main ingredient is pyrogallol tannin, it is used as a mordant in dyeing cotton fibers with basic dyes, and is also used for writing inks and medicines. In medieval Japan, there was a custom to blacken teeth, and it is recorded that iron rods (also called 御 齒 黑) and gallant powder were used.

Looking at the conventional techniques using raw paint or rosin, Korean Unexamined Patent Publication No. 2007-117915 has been developed a method of manufacturing artificial leather using a coating agent containing urushiol.

However, the preceding document simply uses a mixture of urushiwool and artificial leather (PVC) or PMMA (Polymethyl Methacrylate) powder as a coating agent, so it is difficult to use natural ingredients as it is, and PVC is a processed product. In the case of mixing PMMA powder and natural product urushiul, both were not well kneaded, and there was a disadvantage in that the enhanced effect of the kneading was not shown properly.

Korean Laid-Open Patent Publication No. 2005-596720 discloses a synthetic resin for the preparation of natural lacquer and organic solvents (polar and non-polar organic solvents) urethane resins, polyisocyanates, acrylic resins, epoxy resins, polyamides, alkyd resins, polyolefins and combinations thereof. Although lacquer coating compositions containing monomers and metal curing agents have been developed, they also contain natural paint components and artificial paint components, which have the problems of the preceding literature.

In Korean Laid-Open Patent Publication No. 2003-52296, pure pine rosin stabilized for a certain period of time by simply mixing pine rosin extracted from pine and solvent at room temperature in a weight ratio of 50:50 to melt the rosin 110 in a state like water. Although the technique of using as a paint is disclosed, the above-mentioned rosin paint is characterized by enhancing the aesthetics and dignity that can express the naturalness of an object by expressing the color or form of raw materials as it is, and lacquer and rosin as the present invention. The synergistic effect this has cannot be expected.

The present invention is a coating agent for leather products with the composition of the refined lacquer and rosin extract in a ratio of 5: 5, and the leather product is first coated with the acrylic binder, urethane binder and gallant extract. It is related to the coating method. When coating the composition composed of refined lacquer and rosin extract on natural or artificial leather, the leather is prevented from drying out and the popping phenomenon disappears, and it can prevent damage to the product by bacteria and athlete's foot. Odor can be eliminated by sweat and water at the source.Tanninic acid, the main ingredient of the gall bladder, is combined with iron salts to form tannin iron, which is colored black, which makes the color of leather elegant and glossy. If you wipe the leather fabric coated with the above-mentioned primary and secondary coating agent with brown rice vinegar solution, It is characterized in having an effect.

Therefore, an object of the present invention is to extend the life of natural and artificial leather products, to maintain the color or glossiness even if stored for a long time, to prevent damage of leather products by bacteria, lacquer and rosin extract, acrylic binder, urethane binder The purpose of the present invention is to provide a method of coating leather products using the gall bladder extract.

In order to achieve the above technical problem, the present invention is coated with leather products, the main ingredients of the refined refined lacquer and rosin extract and acrylic binder, urethane binder and gallant extract as a resin as the most important component of the coating film (樹脂) It is characterized by.

The refined lacquer is filtered to remove dust or twigs, etc., first collected from the lacquer trunk, and then heated and stirred with distillate so that the moisture content of the water is 15% by weight to 20% by weight.

The rosin extract is characterized in that it is a rubber rosin obtained by removing 20 to 30 parts by weight of water in a distillate and directly heating the vaporized pentapenta oil contained in the feeder.

The gall bladder extract is dried by collecting the gall bladder in the sun and put 10 parts by weight of gall bladder in 100 parts by weight of water, and boiled at 80 to 100 ° C. for 5 to 8 hours. To prepare a coating composition containing the gall bladder extract mixed with 70 parts by weight.

The coating composition of the present invention essentially eliminated the harmful controversy of the organic synthetic coating because there is little component such as lead, arsenic, cadmium, and mercury, which are harmful to the human body by using a vegetable raw material. In addition, the refined lacquer of the present invention is excellent in flame resistance, heat resistance, antiseptic, insect repellent and insulation, and the rosin rosin as a rosin extract has the flexibility to extend the life of leather products and to suppress the generation of static electricity, It was confirmed that the effect of suppressing allergy caused by urushiwool contained, and the gallant extract to elevate the color of the leather and to generate the shine.

It is preferable that the primary coating agent used in the manufacturing method of the leather goods of the present invention contains 60 to 100 parts by weight of the rosin extract with respect to 100 parts by weight of the purified coating, and the secondary coating agent is based on 100 parts by weight of acryl extract and urethane. It is preferable to contain 30-70 weight part of binders, respectively.

The coating agent of the leather product used in the present invention is an environmentally friendly, flame-resistant, heat-resistant, antiseptic, because it does not contain harmful ingredients such as lead, arsenic, cadmium, mercury, etc. contained in chemicals by using extracts of natural plants It has excellent insect repellency, insulation, and flexibility, suppresses the occurrence of static electricity, and in particular, reduces atopic dermatitis, dermatitis, migraine headaches caused by sick house syndrome, and also contains urine extracts contained in tablets by rosin extract. It was confirmed that the effect of suppressing allergic phenomena due to and the effect of the gall bladder extract to elevate the color of the leather and to generate the shine.

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

Preparation Example 1 Preparation of Coatings Containing Tablets

Filtration is performed to remove dust and twigs from sap collected from the sumac trunk. The filtered lacquer solution is heated gradually through distilled water while stirring and heating to obtain a water content of 15% by weight to obtain a purified lacquer.

100 parts by weight of the collected rosin and 30 parts by weight of water are placed in a distillation unit and heated directly to obtain a rubber rosin obtained by evaporating and removing the volatile tapentatin oil contained in the rosin.

The refined lacquer and rubber rosin are mixed at a ratio of 5: 5, and then mixed firstly in a mixer at a temperature of 40 ° C. for 5 hours so that both are evenly mixed. After the first mixing, the coating composition was allowed to stand for 48 hours and then mixed again for 2 hours at a temperature of 40 ° C. to prepare a leather coating.

Preparation Example 2 Preparation of Coatings Containing Mellitus Extract

After drying the collected gall in the sun, add 10 parts by weight of gall in 100 parts of water, boil it at 80 to 100 ° C for 5 to 8 hours, and add 50 parts by weight of acrylic binder and urethane binder to 100 parts by weight of the gall extract extracted at room temperature. The mixture is placed in a blender to be mixed and kneaded for 1 hour to prepare a coating containing the gall bladder extract.

Example 1.

The coating agent containing the tablets prepared in Preparation Example 1 is coated with 1.0 to 2.0% by weight of the fabric (Crust) for 3 to 5 hours to the leather fabric using a spray.

At this time, the spray temperature is 50 ℃. After coating, dry for 8 hours in a well-ventilated shade so that the humidity is 75 ~ 80% at 25 ~ 30 ℃ in a drying room.

The coating agent containing the gall bladder extract prepared in Preparation Example 2 on the primary coated leather fabric is evenly applied to the surface of the livestock with a lacquer brush. Coating amount is applied in 1.0 ~ 2.0% by weight compared to the leather (Crust). After application, store in a well-ventilated shade for 48 hours at 20 ℃ in a dry place. 60% by weight of brown rice vinegar and 40% by weight of water are diluted in the first and second coated leather fabrics, and the surface of the leather fabric is evenly wiped using a cotton fabric.

Comparative Example 1

The leather product (furniture leather, A company) conventionally produced was made into the comparative example 1.

Comparative Example 2

The leather product (Shoe leather, B company) conventionally marketed was made into the comparative example 2.

Experimental Example

The antibacterial activity and the physical properties of the leather were measured by using the leather of cowhide, which is a leather product manufactured in Examples and Comparative Examples 1 and 2 above. The results are shown in the following [Table 1], respectively.

① Antibacterial activity (Halo test)

The antibacterial activity was measured using the KS K 0890 PARALLEL STREAK method as a method to determine the antimicrobial degree by setting the zone of access to the leather product of bacteria (Klebsiella pneumoniae ATCC4352) with leather products.

② Tabber abrasion test

The surface abrasion degree of the leather was measured by using the KS M 6882 method and the wear resistance measurement device (Atlas, USA).

③ bursting test (Mullen bursting test)

Bursting strength was measured by the bursting strength (Bursting M / C) using the KS M 6890 method to measure the degree of popping of the leather.

division unit Example Comparative Example 1 Comparative Example 2 Antimicrobial activity mm       15.0 2.4 2.7 Wear resistance mg loss       21.5 67.5 56.5 Burst strength kgf / cm ²       43.1 39.8 40.9

As shown in [Table 1], as a result of measuring the physical properties of the leather product, the leather product produced in the embodiment of the present invention is significantly more effective than the conventional product compared to the conventional products Comparative Examples 1 to 2 Was found to be excellent, and it was confirmed that the physical properties showed improved physical properties.

Claims (4)

Gradually heating the lacquered aqueous solution with distilled water while stirring to obtain a water content of 15 wt%;
100 parts by weight of rosin and 30 parts by weight of water are placed in a still-heater to obtain a rubber rosin;
Preparing a primary leather product coating agent by mixing the refined lacquer and rubber rosin at a ratio of 5: 5;
Drying the gall bladder in the sun and adding 10 g parts of gall bladder to 100 parts by weight of water to extract the gall bladder extract at 80 to 100 ° C. for 5 to 8 hours;
Preparing a secondary leather article coating agent by mixing 50 parts by weight of the acrylic binder and the urethane binder with respect to 100 parts by weight of the above five gall extracts;
Coating the primary leather article coating agent on a leather fabric using a spray;
Drying the first leather-coated leather fabric;
Applying the second leather product coating evenly to the surface of the leather fabric after the first coating with a lacquer brush
Drying the second coated leather fabric;
A method of coating a leather fabric, comprising the steps of uniformly wiping the coated surface of the leather fabric with a brown rice vinegar solution diluted in the primary and secondary coated leather fabric. The method of claim 1,
Coating method of leather fabric, characterized in that the coating of the first coating agent on the leather fabric 1.0 ~ 2.0% by weight compared to the leather fabric. The method of claim 1,
The coating method of the leather fabric, characterized in that the coating of the second coating agent 1.0 ~ 2.0% by weight compared to the leather fabric on the primary coated leather fabric. The method of claim 1,
The brown rice vinegar solution is a coating method of leather fabric, characterized in that the brown rice vinegar solution diluted by putting 40% by weight of water in 60% by weight brown rice vinegar.