KR101307474B1 - Method for manufacture of color-change laminated split leather using thermochromic microcapsule and color-change laminated split leather using the same - Google Patents

Abstract

PURPOSE: A method for fabricating color change laminate leather using thermochromic microcapsules and the laminated leather fabricated thereby are provided to form a skin film layer on the surface of split leather, thereby showing creativity by color change according to temperature. CONSTITUTION: A method for fabricating color change laminate leather using thermochromic microcapsules comprises the steps of: mixing water dispersion thermochromic microcapsules and aqueous polyurethane resin (S1); coating release paper with the mixture and forming a skin film layer (S2); curing the skin film layer (S3); drying the skin film layer and coating with an aqueous polyurethane adhesive to form an adhesion layer (S4); laminating pretreated split leather on the adhesive layer (S5); drying the skin film layer and split leather (S6); maturing the skin film layer and split leather to enhance the strength (S7); and separating the release paper form the skin film layer (S8). [Reference numerals] (S1) Mixing process; (S2) Skin film layer forming process; (S3) Film layer drying process; (S4) Adhesion layer forming process; (S5) Laminating process; (S6) Drying the laminated material process; (S7) Aging process; (S8) Separating the release paper process

Description

TECHNICAL FIELD OF MANUFACTURE OF COLOR-CHANGE LAMINATED SPLIT LEATHER USING THERMOCHROMIC MICROCAPSULE AND COLOR-CHANGE LAMINATED SPLIT LEATHER USING THE SAME}

The present invention relates to a method for producing a color change laminated leather using a temperature-sensitive microcapsules, and to a color change laminated leather produced by the method, specifically a temperature-sensitive microcapsules that change color with temperature, and a water-soluble polyurethane that is harmless to humans. By using a resin to form a skin film layer on the surface of the leather, the color of the laminated leather using the temperature-sensitive microcapsules that can show the emotional characteristics, originality, environmentally friendly properties and excellent physical properties due to color changes with temperature It relates to a manufacturing method and a color change laminated leather produced by the method.

The leather mainly produced by leather companies is oiled adhesive on dyed split leather, which is manufactured through tanning, dyeing, and drying, or leather finished after tanning, dyeing, and drying. A six-sided leather, that is, laminated leather, is bonded to the oil-based polyurethane film.

Looking at the manufacturing method of the conventional laminated leather, the laminated leather is manufactured through a preparation process, tanning process, dyeing process, coating process. The preparation process is a process of removing raw hair, fat, soluble protein, etc. necessary for leather production under alkaline conditions by inputting the raw material blood, and the tanning process is a stable fiber structure by reacting tanning agents such as collagen protein and chromium. Process of making. Through this process, the dyeing process, which is one of the important factors that determine the product value by giving various colors and flexibility to the leather product according to the merchandise and consumer's desire of the leather product, is carried out, and finally the oily paper on the release paper After coating and drying the polyurethane, an oil-based adhesive is applied to the surface of the skin layer and bonded with the leather to hide the brush of the six-sided leather, thereby performing a coating process of manufacturing leather of the imitation type of grain leather.

However, the laminated leather manufactured by the above method shows a great difference in the properties of the silver leather, so it is only partially used in the lower part, and the above manufacturing methods are toxic due to the nature of the working process due to the use of oil-based polyurethane. The use of this strong organic material has a very poor working environment.

Specifically, in the conventional coating process, a high viscosity oily polyurethane is used, and as a solvent for diluting it, organic solvents, such as dimethyl formaldehyde (DMF), methyl ethyl ketone (MEK), and isopropyl alcohol (IPA), are harmful to the human body. The use of oil-based polyurethanes with excessive solvents adversely affects the detection of harmful substances in the working environment and the final product and the health of the workers, and also lacks the emotional characteristics, originality and functionality that meet the recent trends of the times. Due to this, it is difficult to implement an emotional design at the time of manufacture of leather products, there were problems that act as a cause of harm to the health by the oil-based polyurethane.

In addition, laminated leather, which is manufactured from raw leather, has a looser structure than silver leather, making it difficult to apply general silver leather coating processes such as spray and roll coater. Although it adopts the method of attaching, this method produces the side effects harmful to the environment and the human body by the use of organic solvent in the manufacturing process of the film, and manufacture of imitation leather of silver leather by simply attaching an artificial film to the surface of the leather. Due to the advantages of the leather could not exhibit the emotional characteristics had a disadvantage.

Therefore, in recent years, attempts have been made to enhance the quality of laminated leather by having the leather to have a fragrance or breathability. As a related prior art, Patent Document 1 applies microcapsules to impart aroma to leather, and Patent Document 2 applies to flesh leather. Breathability was given so that it had a breathability similar to that of leather.

However, there is no technology to upgrade the six-sided leather by implementing the color change on the six-sided leather using the microcapsules that change color, and thus the applicant of the present invention has a thermo-microcapsule and the human body and the environment that change color according to temperature. The present invention has been completed by developing a six-sided leather, that is, a laminated leather having functionality of originality and emotional properties and environmentally friendly properties that are harmless to the human body by applying a film using a mixture of a friendly aqueous polyurethane resin.

: Republic of Korea Patent Publication No. 10-361230 "Manufacturing method of leather with aroma" : Republic of Korea Patent Publication No. 10-0962108 "Method of manufacturing breathable flesh leather using water-based polyurethane"

Accordingly, the present invention is to solve the problems as described above, by forming a skin film layer on the surface of the flesh leather using a thermosensitive microcapsules that change color depending on the temperature and a water-soluble polyurethane resin harmless to the human body, Emotional characteristics and originality due to the color change according to the manufacturing method of the color change laminated leather and the color change manufactured by this method using a temperature-sensitive microcapsule to enhance the six-sided leather, that is, laminated leather An object of the present invention is to provide laminated leather.

In addition, in forming the skin film layer as described above, unlike the conventional method for producing a film by elution of an organic solvent such as dimethyl formaldehyde (DMF), methyl ethyl ketone (MEK) and the like, water-dispersible thermosensitive microcapsules and Another object of the present invention is to provide a method of manufacturing color-changed laminated leather using thermo-microcapsules, which are harmless to humans and environmentally friendly by using water-based water-soluble polyurethane resin, and a color-changed laminated leather manufactured by the method.

In addition, as the above-mentioned water-dispersible thermosensitive microcapsules and water-based polyurethane resins are used, there is almost no increase in manufacturing cost, and excellent high physical properties such as flexibility, abrasion resistance, and adhesive strength of leather can create high added value. Another object of the present invention is to provide a method of manufacturing color-changing laminated leather and a color-changing laminated leather produced by the method.

The present invention provides a method of manufacturing a color change laminate leather,

A mixing step (S1) of stirring and mixing the water-dispersible thermosensitive microcapsules and the aqueous polyurethane resin mixture;

A skin film layer forming step (S2) of forming a film layer by coating the mixture stirred in the mixing step (S1) on a release paper;

A film layer drying step (S3) of curing the skin film layer formed through the skin film layer forming step (S2);

An adhesive layer forming step (S4) of forming an adhesive layer by coating an aqueous polyurethane adhesive on the surface of the skin film layer dried through the film layer drying step (S3);

A merging step (S5) of laminating and integrating the pretreated beef skin on the upper part of the adhesive layer formed by the adhesive layer forming step (S4);

A composite material drying step (S6) of drying the skin film layer and the six-sided leather blended through the composite process (S5);

Aging step (S7) to strengthen the adhesive force by aging the skin film layer and the skin leather dried through the composite drying step (S6); And

Using a temperature-sensitive microcapsule, characterized in that it comprises a; release paper separating step (S8) for separating the release paper formed in the skin film layer of the skin film layer and the skin leather aged in the aging step (S7) The manufacturing method of color change laminated leather is made to solve the problem.

In addition, the color change laminated leather produced by the above production method is another solution to the problem.

On the other hand, in the mixing step (S1), it is mixed with 5 to 20 parts by weight of the water-dispersible thermosensitive microcapsules with respect to 100 parts by weight of the aqueous polyurethane resin, and stirred for 1 to 60 minutes to mix to have a viscosity of 3,000 to 9,000 cps. desirable.

In addition, the skin film layer forming step (S2), 0.7 to 1.0 parts by weight of a thickener, based on 100 parts by weight of the mixture stirred in the mixing step (S1), 0.1 to 10 parts by weight of the leveling agent is mixed and mixed for 10 to 60 minutes to have a viscosity of 4,000 to 10,000 cps, and then it is preferably coated on a release paper with a thickness of 30 to 300 μm.

In the film layer drying step (S3), it is preferable to dry the skin film layer formed on the release paper at 50 to 150 ° C. for 5 to 30 minutes.

In addition, the adhesive layer forming step (S4), while applying a water-based polyurethane adhesive 30 to 300㎛ thickness on the surface of the skin film layer dried through the film layer drying step (S3),

The aqueous polyurethane adhesive may have a viscosity of 4,000 to 15,000 cps by mixing 0.1 to 20 parts by weight of a urethane thickener and 0.1 to 20 parts by weight of a curing agent for urethane with respect to 100 parts by weight of an aqueous polyurethane adhesive.

In addition, the mixing step (S5), it is preferable to combine the buffing surface of the surface of the surface of the skin by using a buffing two to three times the fine buffing to short-fiber bubbles on the surface.

In addition, the composite drying step (S6), it is preferable to dry the skin film layer and the six-sided leather blended through the combination step (S5) for 5 to 10 minutes at 50 ~ 150 ℃.

In addition, in the aging step (S7), it is preferable that the skin film layer and the six-sided skin dried through the composite drying step (S6) for 5 to 24 hours at 50 ~ 120 ℃.

The present invention forms a skin film layer on the surface of the flesh leather using a thermo-microcapsules that change color depending on temperature and a water-soluble polyurethane resin that is harmless to the human body, thereby having emotional characteristics and originality due to color change with temperature. Due to this, the six-sided leather, that is, the laminated leather can be advanced, and in addition, in forming the skin film layer as described above, the conventional organic solvents such as dimethylformaldehyde (DMF), methyl ethyl ketone (MEK), etc. Unlike the production method of the film by elution, by using a water-dispersible thermomicrocapsules and water-based water-soluble polyurethane resin, it is harmless to the human body and environmentally friendly. There is almost no increase in manufacturing cost by using urethane resin, and the main property of leather is flexibility and wear resistance. And it is excellent in physical properties such as, the adhesive strength has the effect to create added value.

1 is a process flow diagram illustrating a method for manufacturing color-changing laminate leather using a temperature-sensitive microcapsules according to an embodiment of the present invention.
2 is a view showing the color change of leather with temperature

The present invention for achieving the above effect relates to a method for producing a color-changing laminated leather using a temperature-sensitive microcapsules and to a color-changing laminated leather produced by the method, only the parts necessary for understanding the technical configuration of the present invention will be 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 will be described in detail with respect to the manufacturing method of the color change laminated leather using the thermosensitive microcapsules according to the present invention and the color change laminated leather produced by this method in detail.

1 is a process flow diagram illustrating a method of manufacturing color-changing laminated leather using a thermo-microcapsules according to an embodiment of the present invention, the present invention is a mixing process (S1), skin film layer forming process (S2), film layer drying It comprises a process (S3), an adhesive layer forming process (S4), a foaming process (S5), a composite drying process (S6), a maturing process (S7), and a release paper separation process (S8).

The mixing step (S1) is a process of stirring and mixing the water-dispersible thermosensitive microcapsules and the water-based polyurethane resin mixture, the color of which varies with temperature, the water-dispersible thermosensitive microcapsules 5 ~ 100 parts by weight of the aqueous polyurethane resin Mix 20 parts by weight, stir for 1 to 60 minutes, and mix to have a viscosity of 3,000 to 9,000 cps.

At this time, when the mixing amount of the moisture-type thermosensitive microcapsules is less than 5 parts by weight, the color of the film layer is low, there is a fear that a leather product having a normal color may not be produced, if it exceeds 20 parts by weight, by the temperature-sensitive microcapsules The elasticity of the film is lowered and the film is hard, which may make it unsuitable for leather products.

In addition, when the viscosity is less than 3,000 cps, there is a fear that the coated film is not properly coated on the release paper in the skin film layer forming process (S2), which will be described later. When the viscosity exceeds 9,000 cps, the thickness of the skin film layer becomes uneven or workability. This may fall.

On the other hand, the thermosensitive microcapsules used in the present invention are filled with thermosensitive pigment in a microcapsule made of polypropylene or polyethylene, and the material of the synthetic resin is not limited thereto. The thermosensitive pigment has a characteristic of changing color with temperature. However, since this pigment is very sensitive to the external environment, it is a synthetic resin microcapsule to protect it, and the microcapsules containing the thermochromic dye are called thermochromic microcapsule and the color of the photosensitive microcapsule. The principle of change is that when irradiated with light such as ultraviolet rays, the structure of the inner material of the capsule is changed to have a color. On the contrary, when the light is blocked, the color is returned to the original structure of the capsule and disappears.

In the present invention, it is preferable to use Chameleon-T (Company name: Polychrome Co., Ltd.) as the temperature-sensitive microcapsules, and the color of the temperature-sensitive pigment filled in the temperature-sensitive microcapsules is according to the color and saturation desired by the consumer. It mixes suitably within the limited range, and is used.

The aqueous polyurethane resin used in the present invention is a conventional aqueous polyurethane resin obtained by reacting a water-soluble oligomer such as polyoxyethylene glycol with polyisocyanate as a raw material polyol, and in the present invention, the trade name is NPC-1000 (Company name: It is preferable to use what is called Naux Corporation.

The skin film layer forming step (S2) is a step of forming a film layer by coating the mixture stirred in the mixing step (S1) on a release paper, thickener with respect to 100 parts by weight of the mixture stirred in the mixing step (S1) 0.7 to 1.0 parts by weight, leveling agent 0.1 to 10 parts by weight are mixed and mixed for 10 to 60 minutes to have a viscosity of 4,000 to 10,000 cps, and then coated on a release paper with a thickness of 30 to 300㎛.

At this time, the thickener is added to form a skin layer by providing a smooth flow, cellulose thickener, acrylic thickener, One or more types of acrylic thickeners and polyurethane thickeners are selected and used, and in the present invention, it is preferable to use a polyurethane thickener, and specifically, a brand name VH-100 (company name: NANUX Co., Ltd.) is used. do.

On the other hand, if the added amount of the thickener is less than 0.7 parts by weight, the viscosity is too low, there is a fear that the water-soluble polyurethane resin flows down during skin coating, if it exceeds 1.0 parts by weight, the surface skin of the water-based polyurethane resin due to the high viscosity When the layer is manufactured, streaks are formed, which makes it difficult to manufacture a normal product.

In addition, the leveling agent occurs after coating, the coating film appears to be convex or concave wave shape due to the partial difference in the surface tension, at this time distributed on the surface of the coating film surface action to solve this problem and improve the properties of the coating film surface In order to be added, the silicone diacrylate-type leveling agent and the silicone polyacrylate-type leveling agent are used, Specifically, the brand name NWL-008 (company name: NANUX Co., Ltd.) is used.

On the other hand, when the amount of the silicone-based leveling agent is less than 0.1 parts by weight, it is difficult to form a uniform film layer on the surface of the skin layer by reducing the dispersibility of the water-based polyurethane, when exceeding 10 parts by weight, excessive use There is a fear that the normal film layer is difficult to manufacture because it acts as a barrier to the skin layer formed by the aqueous polyurethane resin.

In addition, when the viscosity of the mixture configured as described above is less than 4,000cps, there is a risk that there is a problem of difficulty in film formation due to the low workability due to the low viscosity and the flow of the resin, if it exceeds 10,000cps, due to the high viscosity The generation of streaks on the surface of the skin film may cause product defects.

In addition, when the mixture configured as described above is applied to the release paper less than 30㎛, there is a fear that the ground color of the leather through the skin layer, if applied over 300㎛, due to the increase in the thickness of the skin layer of the skin layer There is a possibility that the drying property is deteriorated.

The film layer drying step (S3) is a step of curing the skin film layer formed through the skin film layer forming step (S2), and drying the skin film layer formed on the release paper at 50 to 150 ° C. for 5 to 30 minutes. Let's do it.

At this time, when drying conditions are less than the said range, there exists a possibility that sufficient drying may not be carried out, and when it exceeds the said range, there exists a possibility that the fall of workability and the increase of electric power consumption may increase.

The adhesive layer forming step (S4) is a step of forming an adhesive layer by coating an aqueous polyurethane adhesive on the surface of the skin film layer dried through the film layer drying step (S3), the film layer drying step (S3) An aqueous polyurethane adhesive is applied to the surface of the skin film layer dried through a thickness of 30 ~ 300㎛, wherein the aqueous polyurethane adhesive is a urethane thickener 0.1 to 20 parts by weight with respect to 100 parts by weight of the aqueous polyurethane adhesive, curing agent for urethane 0.1 Mix 20 parts by weight to use a viscosity of 4,000 to 15,000 cps.

On the other hand, the water-based polyurethane adhesive used in the present invention is preferably a trade name of NPA-8100 (company name: Naux Co., Ltd.).

In addition, the curing agent for the urethane is the main component is added to the urethane, the brand name is used NH-120 (company name: Naux Co., Ltd.).

On the other hand, when the amount of the urethane-based thickener and the curing agent for urethane is less than the above range, the viscosity of the adhesive is low and workability may be degraded or the curing reaction may not occur properly. The viscosity of the adhesive is high, the workability is inferior or the curing reaction is too fast, there is a fear that the adhesive performance deteriorates.

In addition, when the viscosity of the mixture configured as described above is less than 4,000cps, there is a fear that the viscosity of the adhesive is not properly coated on the upper portion of the skin film layer, if it exceeds 15,000cps, the viscosity of the adhesive is high and the thickness of the coating layer There is a possibility that it becomes uneven or the workability deteriorates.

In addition, when the coating thickness of the water-based polyurethane adhesive is less than the 30㎛ may not maintain the adhesive performance, if it exceeds 300㎛ there is a fear that the productivity due to the problem that the drying time takes a long time.

Wherein the step (S5) is a step of integrating and integrated the pre-treated six-sided leather on the upper portion of the adhesive layer formed by the adhesive layer forming step (S4), the six-sided leather to be used in this process is the back of the fine leather, That is, it is a low-grade leather with a fat layer attached to it, and is manufactured by deliming, tanning, dyeing, and drying in accordance with a conventionally known manufacturing method of beef skin, and is commonly used for bonding to increase the adhesion with the skin film layer. Using a buffing machine, two or three fine bets are used to make the surface of the surface as short as possible, making the surface feel as smooth as possible.

The composite material drying step (S6) is a step of drying the skin film layer and the six-sided leather blended through the above-mentioned step (S5), the skin film layer and six-sided leather that was laminated through the composite step (S5) 50 Dry for 5-10 minutes at ˜150 ° C.

At this time, if the drying conditions are less than the above range, there is a fear that not enough drying, if exceeding the above range, there is a fear that the problem of increased power consumption and reduced productivity.

The aging step (S7) is a step of strengthening the adhesive force by aging the skin film layer and the skin leather dried through the composite drying step (S6), in this step skin for smooth adhesion of the skin leather and skin film After applying the adhesive to the film layer to be combined with the leather to induce aging without removing the release paper to establish a aging process that has a strong adhesive force between the skin film and the leather by the water-based polyurethane adhesive, specifically, the composite drying process The skin film layer and the skin leather dried through (S6) are aged at 50 to 120 ° C. for 5 to 24 hours.

At this time, if the aging conditions are less than the range defined above, the maturing temperature and duration is short, not sufficiently aged and dried, may weaken the adhesion between the skin leather and the skin film layer, the maturing conditions are limited to If the range is exceeded, the adhesion between the color change film and the leather produced is reduced, there is a risk of product defects.

The release paper separating step (S8) is a step of separating the release paper formed on the skin film layer of the skin film layer and the skin of the skin aged aged in the aging step (S7).

In addition, the kind of compounds, such as the water-dispersible thermosensitive microcapsule, the water-based polyurethane resin, the water-based polyurethane adhesive, the urethane thickener, the silicone leveling agent, and the urethane hardening agent, which are defined above, are not necessarily limited to the trade names listed above. In the case of a compound having physical properties equivalent to or higher than the trade name defined above, the compound can be used regardless of its kind.

Hereinafter, the configuration of the present invention will be described in detail by the following examples and comparative examples, the configuration of the present invention is not necessarily limited to the following description.

(Example 1)

Water-dispersible thermomicrocapsules and water-based polyurethane resin mixtures were coated on release paper by the Knife over roll method to form a skin film layer with a thickness of 30 μm, followed by increasing the temperature from 50 ° C to 150 ° C sequentially. After drying for 30 minutes, the surface of the skin film layer was coated with an aqueous polyurethane adhesive on the surface of the skin film layer to a thickness of 30 μm, and then the skin film was bonded to 1.40mm thick skin leather and skin film at 50 ° C. to 150 ° C. After increasing the temperature sequentially to 10 minutes to dry and then aged skin film and leather aged to aging for 24 hours at 70 ℃ to excellent adhesion of the skin film and leather and then separated the release paper and the color changes depending on the temperature Laminated leather, a six-sided leather of thickness 1.43 mm, was prepared.

The water-dispersible thermosensitive microcapsules have a solid content of 30 ± 5% by weight of 10 parts by weight of the water-dispersible thermosensitive microcapsules (Chameleon-T, polychromium) and the aqueous polyurethane resin mixture have a solid content of 35 ± 2% by weight of an aqueous polyurethane (NPC- 1000, Nanux) 100 parts by weight of the mixture for 10 minutes, then 1.0 parts by weight of the urethane thickener (VH-100, Nanux) and 0.1 parts by weight of the wetting & leveling agent (NWL-008, Nanux) silicone-based leveling agent was mixed again and mixed for 20 minutes The viscosity was adjusted to 9,000 cps.

In addition, the aqueous polyurethane adhesive is 10 parts by weight of a polyurethane-based thickener (VH-100, Nanux) and 100 parts by weight of an aqueous polyurethane adhesive (NPA-8100, Nanux) having a solid content of 35 ± 2% by weight and a curing agent for polyurethane (NH- 120, Nanux) 1 part by weight of mixing to adjust the viscosity to 13,000cps.

(Comparative Example 1)

In the same manner as in Example 1, laminated leather, which is a six-sided leather having breathability, was manufactured. However, the content of the thermomicrocapsules used in Comparative Example 1 is as follows.

The water-dispersible thermosensitive microcapsules include 30 parts by weight of 30 ± 5% by weight of the water-dispersible thermosensitive microcapsules (Chameleon-T, polychromium) and an aqueous polyurethane resin mixture with a solid content of 35 ± 2% by weight of the aqueous polyurethane (NPC- 1000, Nanux) 100 parts by weight of the mixture for 10 minutes, then 1.0 parts by weight of the urethane thickener (VH-100, Nanux) and 0.1 parts by weight of the silicone leveling agent Wetting & Leveling agent (NWL-008, Nanux) again mixed for 20 minutes Mix and mix to adjust the viscosity to 9,000 cps.

In addition, the aqueous polyurethane adhesive is 10 parts by weight of a polyurethane-based thickener (VH-100, Nanux) and 100 parts by weight of an aqueous polyurethane adhesive (NPA-8100, Nanux) having a solid content of 35 ± 2% by weight and a curing agent for polyurethane (NH- 120, Nanux) 1 part by weight of mixing to adjust the viscosity to 13,000cps.

As a result of evaluating the physical properties of Example 1 and Comparative Example 1 as shown in Table 1 below.

Test Items unit Example Comparative example Test Methods One One thickness mm 1.43 1.43 ASTM D 1814 Abrasion test mgloss 42 150 ASTM D 3884 Flexibility Test cycle 50,000 10,000 DIN 53351 Adhesion Strength Test kgf / cm 5.9 1.5 U.T.M TEST SPEED: 200mm / min Color change with temperature g / m ² · day Discolored Discolored Image

According to the content of [Table 1], Example 1 according to the present invention exhibited superior properties compared to Comparative Example 1, showing excellent physical properties compared to Comparative Example 1 wearability, adhesive strength and flexibility.

In addition, as shown in Figure 2, when the temperature of the leather surface is less than 30 ℃ no change in color, when the surface temperature of the leather is more than 31 ℃ color change of the leather is observed to change color laminated leather using a temperature-sensitive microcapsule Emotional and originality due to the manufacture of the product was prepared.

As described above, the manufacturing method of the color-changing laminated leather using the temperature-sensitive microcapsules according to the present invention and the color-changing laminated leather produced by the method has been confirmed its superiority through the above examples, and the present invention Those skilled in the art will appreciate that various modifications and changes can be made in the present invention without departing from the spirit and scope of the invention as set forth in the claims below.

S1: Mixing Process S2: Skin Film Layer Forming Process
S3: Film layer drying process S4: Adhesive layer forming process
S5: Composite process S6: Composite material drying process
S7: aging process S8: release paper separation process

Claims (9)

In the manufacturing method of the color change laminated leather,
A mixing step (S1) of stirring and mixing the water-dispersible thermosensitive microcapsules and the aqueous polyurethane resin mixture;
A skin film layer forming step (S2) of forming a film layer by coating the mixture stirred in the mixing step (S1) on a release paper;
A film layer drying step (S3) of curing the skin film layer formed through the skin film layer forming step (S2);
An adhesive layer forming step (S4) of forming an adhesive layer by coating an aqueous polyurethane adhesive on the surface of the skin film layer dried through the film layer drying step (S3);
A merging step (S5) of laminating and integrating the pretreated beef skin on the upper part of the adhesive layer formed by the adhesive layer forming step (S4);
A composite material drying step (S6) of drying the skin film layer and the six-sided leather blended through the composite process (S5);
Aging step (S7) to strengthen the adhesive force by aging the skin film layer and the skin leather dried through the composite drying step (S6); And
Using a temperature-sensitive microcapsule, characterized in that it comprises a; release paper separating step (S8) for separating the release paper formed in the skin film layer of the skin film layer and the skin leather aged in the aging step (S7) Manufacturing method of color change laminated leather
The method of claim 1,
The mixing process (S1) is
5 to 20 parts by weight of water-dispersible thermosensitive microcapsules were mixed with 100 parts by weight of the aqueous polyurethane resin, and stirred for 1 to 60 minutes to mix to have a viscosity of 3,000 to 9,000 cps. Manufacturing method of laminated leather
The method of claim 1,
The skin film layer forming step (S2),
After mixing the thickening agent 0.7 to 1.0 parts by weight, leveling agent 0.1 to 10 parts by weight with respect to 100 parts by weight of the mixture in the mixing process (S1), and mixed for 10 to 60 minutes to have a viscosity of 4,000 to 10,000cps, Manufacturing method of color change laminate leather using thermo-microcapsules characterized in that the coating on the release paper 30 ~ 300㎛ thickness
The method of claim 1,
The film layer drying step (S3),
Method for producing a color change laminated leather using a thermomicrocapsule, characterized in that the skin film layer formed on the release paper is dried for 5 to 30 minutes at 50 ~ 150 ℃
The method of claim 1,
The adhesive layer forming step (S4),
While applying a water-based polyurethane adhesive 30 ~ 300㎛ thickness on the surface of the skin film layer dried through the film layer drying step (S3),
The water-based polyurethane adhesive is mixed with 0.1 to 20 parts by weight of a urethane thickener and 0.1 to 20 parts by weight of a curing agent for urethane with respect to 100 parts by weight of an aqueous polyurethane adhesive using a temperature-sensitive microcapsule, characterized in that having a viscosity of 4,000 ~ 15,000cps Manufacturing method of color change laminated leather
The method of claim 1,
The mixing step (S5),
Method of manufacturing color-changing laminated leather using thermo-microcapsules, characterized in that the surface of the surface of the surface of the surface of the skin by using a buffing machine using a buffing two to three times to pre-treat the bubble to short-fiber bubbles
The method of claim 1,
The composite drying step (S6),
Method of manufacturing a color-changing laminated leather using a thermo-microcapsule, characterized in that for 5 to 10 minutes drying the skin film layer and six-sided leather blended through the combination step (S5) at 50 ~ 150 ℃
The method of claim 1,
The aging step (S7),
Method for producing a color-changing laminated leather using a thermo-microcapsules, characterized in that the skin film layer and the skin leather dried through the composite drying step (S6) for 5 to 24 hours at 50 ~ 120 ℃
Color-changed laminated leather produced by the manufacturing method according to any one of claims 1 to 8.

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