KR101864724B1 - The method for produing leather for boad seat for fastness promotion of sunlight - Google Patents

Abstract

The present invention relates to a method of manufacturing a leather for a boat sheet for improving the light fastness of light. More particularly, the present invention relates to a method for producing a leather for a boat sheet suitable for a marine environment, wherein a primer is applied to the surface of the crust leather in a pretreatment step prior to the present coating step and a UV screening agent is mixed with a coating agent The surface of the leather is treated in the base and the medium coating process to stabilize the surface texture and to improve the light resistance and to carry out the hot pressing process at a temperature of 70 ° C after each base, And more particularly, to a method for producing a leather for a boat sheet for improving the fastness to light of sunlight so that the paint film is not damaged and the light resistance is improved even when exposed to the marine environment for a long time.
To this end, the present invention relates to a method of manufacturing a golf ball comprising the steps of: (a) a pretreatment step of treating a leather surface with a crust leather to stabilize the leather surface texture; (b) a base painting step of treating the surface of the leather with a coating agent containing a white pigment to make the surface of the leather white; And (c) after the step (b), the main coating of the base skin, the medium, and the top coating treatment is performed by mixing the coating material containing the UV screening agent, water, primer, binder, wax, waterproofing agent and pigment in the crust leather The present invention also provides a method for manufacturing leather for a boat sheet for improving light fastness of light.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing a leather for a boat seat,

The present invention relates to a method of manufacturing a leather for a boat sheet for improving the light fastness of light. More particularly, the present invention relates to a method for producing a leather for a boat sheet suitable for a marine environment, wherein a primer is applied to the surface of the crust leather in a pretreatment step prior to the present coating step and a UV screening agent is mixed with a coating agent The surface of the leather is treated in the base and the medium coating process to stabilize the surface texture and to improve the light resistance and to carry out the hot pressing process at a temperature of 70 ° C after each base, And more particularly, to a method for producing a leather for a boat sheet for improving the fastness to light of sunlight so that the paint film is not damaged and the light resistance is improved even when exposed to the marine environment for a long time.

Leather is widely used in various industrial fields such as shoes, clothes, miscellaneous goods, automobile and ship interior materials because of its high quality and high degree of chemical and physical action.

Meanwhile, the leather used as a ship interior material has characteristics that the durability of the interior material is good and must be robust. In addition to the durability of such a leather, various research and development have been carried out to enhance the light resistance against exposure to long- ought.

 As a related art, "Korean Patent Laid-Open Publication No. 2015-0076558 (published on Jul. 20, 2015), a method of producing a high light-resistance artificial leather" is disclosed.

The present invention relates to a process for producing an artificial leather comprising the steps of simultaneously impregnating a nonwoven fabric with a UV absorber and a light stabilizer when the polymeric elastomer is impregnated with the UV absorber and the light stabilizer, To thereby reduce the yellowing of the polyurethane and to improve the light resistance of the product and to exhibit an excellent light fastness to light.

However, the prior art is limited to a technique for improving the light resistance of artificial leather impregnated with a polymer elastomer, and when applied to natural leather, it is difficult to attach the leather permanently, which is not suitable for the production process of natural leather.

The present invention has been conceived in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method for improving light fastness, which can stabilize leather surface texture, improve light fastness of light, The present invention provides a method for producing natural leather for use as a natural leather.

In order to accomplish the above object, the present invention provides a method of manufacturing leather for a boat seat for improving the fastness of light of a sunlight according to the present invention, comprising the steps of: (a) pretreating a leather surface with a primer by using crust leather, fair; (b) a base painting step of treating the surface of the leather with a coating agent containing a white pigment to make the surface of the leather white; And (c) after the step (b), the main coating of the base skin, the medium, and the top coating treatment is performed by mixing the coating material containing the UV screening agent, water, primer, binder, wax, waterproofing agent and pigment in the crust leather Process.

In addition, the UV screening agent to be treated in the step (c) is all treated in the base and medium coating process, and is treated once to four times per 10% by weight of the total weight of the coating treatment chemicals. have.

Further, the ironing process for pressing the surface of the leather is performed every time the base, the medium, and the top coating process are performed, and the temperature at which the hot pressing process is performed is 70 degrees.

According to the present invention, the primer is applied to the surface of the crust leather in the pretreatment step, the UV screening agent is mixed with the coating agent in the present coating process to treat the leather surface, thereby stabilizing the surface texture and improving the fastness to light It is effective.

In addition, according to the present invention, the UV screening agent can be treated in the base coating process, the base coating process, and the intermediate coating process, thereby achieving excellent light resistance.

In addition, according to the present invention, by performing a hot-pressing process at a temperature of 70 degrees Celsius after each base, medium, and top coating process, the surface is uniformly maintained so that bending does not occur in the leather, It is effective.

According to the present invention, it is possible to increase the light resistance by increasing the application frequency of the UV screening agent in the base and medium coating process, as compared with the top coating process in which the process is performed closest to the surface of the leather.

FIG. 1 is a graph showing energy change rate (.DELTA.E) according to application after applying a UV screening agent according to a process according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

FIG. 1 is a graph showing energy change rate (.DELTA.E) according to application after applying a UV screening agent according to a process according to a preferred embodiment of the present invention.

The method for manufacturing a leather for boat sheet for improving the fastness of light according to a preferred embodiment of the present invention is characterized in that a primer is treated for stabilizing the surface texture of the leather before the painting process and then UV light for improving the fastness of light to the primer- Treating the barrier agent, wherein the UV screening agent is treated in both a base and a medium process.

Hereinafter, a method of manufacturing a leather for a boat sheet for improving light fastness according to a preferred embodiment of the present invention will be described in more detail for each process.

The pretreatment process is a process in which water, a binder, a filler, a wax, a primer and a pigment casein are mixed and applied to the leather surface to stabilize the texture of the leather surface.

The filler is a medicament to be added to impart softness and leather to the leather, and the wax and the pigment are excellent in hiding power. The casein is to prevent tackiness, and the binder is used to improve adhesion It is for this reason.

The primer can be treated to stabilize the surface texture of the leather before the painting process and to show the color more clearly during the painting process. At this time, the primer may be selected from a cationic binder, a cationic sealing binder, and Stucco.

Next, a coating process is performed in which a UV-screening agent is applied to the primed leather in the pretreatment process to enhance the light fastness of the light.

The painting process includes a basic painting process and a main painting process.

The basic painting process is a process of treating a coating material containing a white pigment on the surface of leather to produce white, which is processed in order to clearly understand the color change depending on the UV blocker to be treated in the following process.

In one embodiment, the white pigment treatment in the basic painting process is preferably carried out twice by spraying.

It is preferable to use the pigment in the basic coating process in an amount of 20 to 22 wt% based on the total coating treatment chemicals. As the amount of pigment used in the basic coating process increases, the chromaticity of the base coating process during the subsequent coating process is improved and the covering power is increased. However, when the amount of the pigment exceeds 22 wt% of the total coating treatment chemicals, there is a problem that the bending property of the leather is weakened have.

This painting process is a work process that can paint the surface of leather or prevent the corrosion of leather and extend its life. It is a process that mixes water, primer, binder, wax, waterproofing agent, pigment, , Medium, and top coating process.

The base coating process is a process for adhesion between a leather and a paint film. It is processed by mixing water, pigment, binder, wax, filler, leveler and UV blocker.

It is preferable that the coating treatment chemicals mixed in the base coating process are processed approximately 4 times by the spray method.

Here, the binder may be an acrylic binder which improves the adhesion between the leather and the film, and a Urethane binder which improves the physical properties of the leather.

In one embodiment, 170 g of water, 200 g of pigment, 100 g of UV blocker, 250 g of acrylic binder, 150 g of urethane binder, 80 g of wax and 50 g of leveler are mixed and treated in the base coating process.

The amount of pigment used in the base coating process is preferably 20% by weight to 22% by weight based on the total coating treatment chemicals. As the amount of the pigment used in the base coating process increases, the chromaticity is better and the coverage is increased. However, when the amount of the pigment exceeds 22% by weight, the flexibility of the leather is weakened.

The medium coating process is a process to treat colors to impart color to the leather. It is a process of mixing colors such as water, pigments, binders, waxes, fillers, levelers, UV blockers and cross linking agents .

In one embodiment, in a medium coating process, 170 g of water, 200 g of pigment, 100 g of UV blocking agent, 150 g of acrylic binder, 250 g of urethane binder, 80 g of wax and 50 g of leveler are mixed and treated.

In one embodiment, the amount of pigment used in the medium coating process is preferably between 20% and 22% by weight of the total coating treatment. If it exceeds 22% by weight, the adhesion with the leather is weakened and the flexibility is lowered.

It is preferable to treat the mixed coating treatment chemicals in the medium coating process four times by the spray method.

The cross linking agenet introduced in the medium coating process improves the degree of cross-linking of the coating agent to improve the binding force of the binder.

The top coating process is a process for imparting gloss and touch on the leather surface, and it is preferable to mix water, a rocker, and the like, and treat it once.

The locker used in the top coating process may be selected from NC lockers, CAB lockers, and water-soluble lockers.

In one embodiment, in the topcoating process, 400 g of water and 600 g of a rocker can be mixed and processed.

The UV screening agents are all treated in a base coating and a medium coating, wherein the UV screening agent is preferably a benzotriazole type.

Hereinafter, the experimental results showing that the fastness to sunlight was highest when the UV-screening agent was treated in both the base coating and the medium coating process is shown in [Table 1], [Table 2], and [Figure 1].

Evaluation items UNIT Non-treatment Comparative Example 1 Comparative Example 2 Example 1 Comparative Example 3 Thickness mm 1.6-1.8 1.6-1.8 1.6-1.8 1.6-1.8 1.6-1.8 Softness Test - 2.4 2.4 2.3 2.4 2.3 UV Test grade One 3 2-3 4 2 Rubbing Test Dry
Wet grade 4-5
5 4-5
5 4-5
5 4-5
5 4-5
5

Table 1 is an experimental result table which examines the effect of improving the deposition on the surface and the light fastness of the surface by treating the UV screening agent with 10 wt% based on the total weight of the coating agent for each base, medium and top coating process.

As shown in Table 1, Comparative Examples 1 to 3 and Example 1, which were treated with a UV screening agent, showed better light fastness than Non-treatment without UV screening treatment.

Table 1 shows the results of a comparison between the results of Comparative Example 1 (treated only in the base coating process), Comparative Example 2 (treated only in the medium coating process) and Comparative Example 3 (treated only in the top coating process) A comparison of Example 1 in which the UV screening agent was treated in both the medium coating process was shown.

Comparative Example 2 (UV screening treatment only for the base coating process), Comparative Example 2 (UV screening treatment only for the medium coating process), and Comparative Example 3 (top coating) were performed in the case of applying the UV screening agent to the base and medium coating process in Example 1, (UV curing agent only in process), the flexibility and rub fastness maintained the same performance, and the light fastness was excellent.

Here, the amount of UV blocker used was 10% by weight based on the total weight of the coating treatment chemicals, and it was found that the fastness to light was excellent.

Referring to FIG. 1, F-UV-B-3 (treated at the same time in the base and medium coating process) in which the UV screening agent was applied was applied to each application process, whereas the ΔE of Comparative Example 1, > F-UV-M-1 (treated only for base coating process)> F-UV-BM-2 (treated only for medium coating process) And the treatment of UV screening agent was found to be weaker in the sunlight as it was closer to the surface of the leather.

Factor Non-treatment F-UV-M-2 F-UV-BM-2 F-UV-B-3 F-UV-T-4 Image and UV fastness
(Daylight fastness)

변색
1등급normal

discoloration
1 rating normal

discoloration
3 ranks normal

discoloration
2-3 ratings normal

discoloration
4 ratings normal

discoloration
2 ratings E 52 18 29 9 36

In particular, as shown in Table 2, in the case of F-UV-B-③, in which the UV blocker was simultaneously applied to the base and the medium process, the reduction rate was the best as compared with the group not treated with the UV blocker. It was found that the fastness to sunlight was the most excellent in the base and medium coating process, not in the process.

Ironing is a process of pressing the surface of the leather under high temperature and high pressure, and is performed at a temperature of 70 degrees Celsius after the base, medium and top coating processes.

If the ironing process is performed at less than 70 degrees Celsius, the surface of the leather may be uneven and the leather may be bent. If the ironing process exceeds 70 degrees Celsius, the paint film may be damaged due to the high temperature There is a problem.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (3)

(a) Pretreatment process in which crust leather is used to stabilize leather surface texture by mixing water, binder, filler, wax, primer, pigment, casein and primer to treat the leather surface;
(b) Painting treatment chemicals containing white pigment on the surface of the leather.
The surface of the leather is made white, and the amount of the pigment used is 20% by weight to 22% by weight based on the total coating treatment chemicals; And
(c) After the step (b), the crust leather is mixed with a coating agent containing a UV screening agent, water, a primer, a binder, a wax, a waterproofing agent, a pigment and a cross- This coating process applied to leather surface
/ RTI >
In step (a), the primer
A cationic bonding agent, a cationic bonding agent, a stucco, and a cationic sealing binder,
The UV screening agent to be treated in the step (c) may be one to four treatments per 10% by weight of the total weight of the coating agent
And,
Ironing treatment is performed to pressurize the surface of the leather every time the base, the medium, and the top coating process are performed, and the temperature at which the hot pressing is performed is 70 degrees Celsius
And,
The UV blocker of step (c) is benzotriazole
Wherein the method comprises the steps of:















delete delete

Images