KR20240073765A - Decoration sheet and method for manufacturing the same - Google Patents

Abstract

A decor sheet according to an exemplary embodiment of the present invention includes an acrylic base layer having an acid value of 1 mg KOH/g to 19 mg KOH/g; and a first coating layer provided on the acrylic base layer and including a microfolding structure, and the adhesion between the acrylic base layer and the first coating layer is 5B by a standard cross-cut method according to ASTM D3359. am.

Description

Decoration sheet and its manufacturing method {DECORATION SHEET AND METHOD FOR MANUFACTURING THE SAME}

This application claims the benefit of the filing date of Korean Patent Application No. 10-2022-0155542 filed with the Korea Intellectual Property Office on November 18, 2022, the entire contents of which are incorporated herein by reference.

The present invention relates to a decor sheet and a method of manufacturing the same.

When manufacturing building interior materials or furniture films, deco sheets with matte characteristics (or low-glow characteristics) are widely used. For example, a technology for producing a matte decor sheet is being used by applying a coating agent containing a matting agent (e.g., silica, etc.) onto a substrate and then curing it.

However, recently, furniture materials using acrylic base materials with excellent durability and moldability, as materials that have a glass-like depth and a luxurious feel, rather than simple films, are being demanded in premium product lines.

Research is being conducted to realize a matte surface with a sense of depth by forming a matte coating layer on the acrylic substrate, but there is a problem in that adhesion between the acrylic substrate and the matte coating layer is low. In particular, there is a problem that shrinkage occurs during the curing process of the composition for a matte coating layer formed on a sturdy acrylic substrate, and the matte coating layer formed on the acrylic substrate easily falls off. To solve this problem, methods such as using monomers with low shrinkage and oligomers with low functional groups in the composition for the matte coating layer or introducing a primer layer are being studied. However, these methods are used to improve the contamination resistance of products containing an acrylic base material and a matte coating layer. and the hardness is lowered, making it unsuitable.

Meanwhile, in relation to realizing the above-mentioned matte properties, commonly used matting agents are porous and have a low apparent specific gravity, so they are located on the surface layer of the coating and increase the surface adsorption of foreign substances (e.g. fine dust, moisture, grease, etc.). It may also deteriorate the stain resistance of the matte coating layer.

To solve this problem, instead of minimizing the matting agent, a method was proposed to create a matte surface by applying a coating solution to the surface of the decor sheet and then directly forming fine wrinkles using UV light. In particular, the coating solution used chain-shaped monomers or long-chain oligomers to provide superior matting properties and a soft touch feeling. However, in the case of forming a fine folding structure directly on the coating layer of the decor sheet like this, the degree of freedom of the coating layer is low due to the high dependence on gloss depending on the treatment agent, and a surface coating treatment agent or a surface coating treatment to satisfy all of excellent surface hardness, excellent stain resistance and gloss There were limitations in developing coating methods, etc.

Therefore, there is a demand in the technical field for the development of a decor sheet with excellent stain resistance and matte properties.

Republic of Korea Patent Publication No. 10-2010-0138342

The present invention seeks to provide a decor sheet and a method of manufacturing the same. More specifically, the present invention seeks to provide a decor sheet that not only has excellent stain resistance and matte properties, but also has excellent adhesion between the base layer and the coating layer, and a method for manufacturing the same.

One embodiment of the present invention is,

An acrylic base layer having an acid value of 1 mg KOH/g to 19 mg KOH/g; and

It is provided on the acrylic base layer and includes a first coating layer including a fine folding structure,

The adhesion between the acrylic base layer and the first coating layer is 5B using a standard cross-cut method according to ASTM D3359.

In addition, another embodiment of the present invention is,

Preparing an acrylic base layer having an acid value of 1 mg KOH/g to 19 mg KOH/g and a release transfer film including a microfolding structure, respectively;

Coating a first solvent-free coating composition on the acrylic base layer;

The fine folding structure of the release transfer film is brought into close contact with the coated first solvent-free coating composition, and the reverse image of the fine folding structure of the release transfer film is transferred to the surface of the coated first solvent-free coating composition, 1 forming a coating layer; and

comprising removing the release transfer film,

A method for manufacturing a decor sheet is provided, wherein the adhesion between the acrylic base layer and the first coating layer is 5B using a standard cross-cut method according to ASTM D3359.

The decor sheet according to an exemplary embodiment of the present invention has excellent stain resistance and matte characteristics.

In particular, the decor sheet according to an embodiment of the present invention, even when applying a relatively thick acrylic base layer compared to the conventional PET base layer, by applying an acrylic base layer with an acid value of 1 mg KOH/g to 19 mg KOH/g , It has the characteristic of excellent adhesion between the acrylic base layer and the coating layer.

Therefore, the decor sheet according to an exemplary embodiment of the present invention has both the depth of glass and the matte characteristics, so it can be applied as a surface decoration material for various furniture.

Figure 1 is a diagram showing the surface of the first coating layer of the decor sheet according to Example 1 of the present invention.
Figure 2 is a diagram showing the surface of the second coating layer of the release transfer film according to Example 1 of the present invention.
Figure 3 is a diagram showing the surface of the second coating layer of the release transfer film according to Example 2 of the present invention.
Figure 4 is a diagram showing the surface of the first coating layer of the decor sheet according to Example 2 of the present invention.
Figure 5 is a diagram showing the Py-GC/MS measurement results of the acrylic base layer applied in Example 1 of the present invention.
Figure 6 is a diagram showing the Py-GC/MS measurement results of the acrylic base layer applied in Comparative Example 1 of the present invention.

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

In the present invention, when a member is said to be located “on” another member, this includes not only the case where a member is in contact with another member, but also the case where another member exists between the two members.

In the present invention, when a part "includes" a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary.

Conventional decor sheets generally used polyethylene terephthalate (PET) or glycol-modified polyethylene tehrephthalate (PETG) as a base layer. In addition, in order to minimize the matting agent used to achieve the matte characteristic, in addition to forming a fine folding structure directly on the coating layer of the decor sheet, a release transfer mold film with fine wrinkles is formed after applying the coating solution on the base layer. A method of covering and then curing with UV light was proposed to achieve high hardness and anti-fouling properties with an oxygen blocking effect.

However, when a relatively thick acrylic base layer compared to PET is applied as the base layer of the decor sheet, and the curing process is performed while a release transfer film is covered on the acrylic base layer to realize a matte surface of the decor sheet, , short-wavelength UV is blocked, making effective curing at the interface between the acrylic base layer and coating layer difficult. Accordingly, there is a problem in that the adhesion between the acrylic base layer and the coating layer is lowered. In addition, as a component of the coating layer of the decor sheet, multifunctional oligomers or monomers that are effective in hardness or stain resistance can be used. When these are used, the adhesion between the acrylic base layer and the coating layer can be further reduced due to the high shrinkage rate. It has become more difficult to use functional oligomers or monomers, making it difficult to implement a matte coating layer with excellent physical properties.

Additionally, when the thickness of the acrylic base layer is less than 0.3 mm, the acrylic base layer is heated by the heat generated during the UV curing process, thereby ensuring adhesion between the acrylic base layer and the coating layer. However, when the thickness of the acrylic base layer is 0.3 mm or more, adhesion between the acrylic base layer and the coating layer cannot be secured solely with the heat generated during the UV curing process. To solve this problem, there is a method of additionally heating the acrylic base layer, but this is not preferable because bending may occur in the acrylic base layer.

Accordingly, the present invention seeks to provide a decor sheet with excellent adhesion between the acrylic base layer and the coating layer and a method for manufacturing the same, even when applying a relatively thick acrylic base layer compared to the conventional PET base layer.

A decor sheet according to an exemplary embodiment of the present invention includes an acrylic base layer having an acid value of 1 mg KOH/g to 19 mg KOH/g; and a first coating layer provided on the acrylic base layer and including a microfolding structure, and the adhesion between the acrylic base layer and the first coating layer is 5B by a standard cross-cut method according to ASTM D3359. am.

In one embodiment of the present invention, the acrylic base layer may serve to provide mechanical properties to the decor sheet. More specifically, the acrylic base layer can support the coating layer to maintain the sheet shape, and protect the coating layer to enhance weather resistance and durability.

The acid value of the acrylic base layer is characterized in that it is 1 mg KOH/g to 19 mg KOH/g. By satisfying the acid value of the acrylic base layer from 1 mg KOH/g to 19 mg KOH/g, wetting can be improved and the coating composition for forming the coating layer can be uniformly applied. Accordingly, the decoration sheet has an excellent appearance, and the interfacial adhesion between the acrylic base layer and the coating layer can be further improved through chemical bonding between the acid component of the acrylic base layer and the coating layer.

If the acid value of the acrylic base layer is less than 1 mg KOH/g, the chemical bond between the acrylic base layer and the coating layer may be insufficient, so adhesion may be reduced, which may also reduce the surface hardness of the coating layer. In addition, the surface energy of the acrylic base layer is lowered to 42 mN/m or less, which may result in poor wettability of the composition for the coating layer, resulting in poor appearance. In addition, when the acid value of the acrylic base layer exceeds 19 mg KOH/g, coextrusion workability may decrease, the ethanol resistance of the acrylic base layer may decrease, and whitening may occur, and yellowing phenomenon may occur. This can happen.

In one embodiment of the present invention, the acrylic base layer having an acid value of 1 mg KOH/g to 19 mg KOH/g may be manufactured by polymerizing a monomer having an acid functional group with an acrylic resin. Therefore, the acrylic base layer having an acid value of 1 mg KOH/g to 19 mg KOH/g may include an acrylic resin grafted with an acid functional group.

The monomer having the acid functional group may include one or more of carboxylic acid monomer, maleic acid monomer, and phosphate monomer. In particular, the acrylic base layer having an acid value of 1 mg KOH/g to 19 mg KOH/g preferably includes an acrylic resin grafted with carboxylic acid, but is not limited thereto.

In one embodiment of the present invention, the acid value of the acrylic base layer can be measured according to the KS M 5000-2231 standard, and the acid value component can be detected through Py-GC/MS (Pyrolysis Gas Chromatography Mass Spectrometer). .

In addition, in the finished product state of a decor sheet including an acrylic base layer and a first coating layer, the method of measuring the acid value of the acrylic base layer is as follows. In order to measure the acid value of the acrylic base layer, the acrylic base layer can be separated from the finished product of the decor sheet including the acrylic base layer and the first coating layer. For example, the first coating layer may be removed from the acrylic base layer using a knife to separate only the acrylic base layer. In addition, the finished product of the decor sheet including the acrylic base layer and the first coating layer can be immersed in liquid nitrogen and cooled to separate the first coating layer from the acrylic base layer to separate the acrylic base layer. Even when an additional layer is provided on the side opposite to the side of the acrylic base layer provided with the first coating layer, the acrylic base layer can be separated using the above-described methods. The acid value of the acrylic base layer separated by this method can be measured according to the KS M 5000-2231 standard.

The acrylic base layer may be a polymethyl methacrylate (PMMA) sheet.

The thickness of the acrylic base layer may be 0.3 mm to 5 mm, 1.2 mm to 4 mm, and 1.5 mm to 3 mm. When the thickness range of the acrylic base layer is satisfied, it can be advantageous for maintaining the shape of the decor sheet and strengthening weather resistance and durability. If the thickness of the acrylic base layer is less than 0.3 mm, it is not preferable because the three-dimensional effect and sense of depth may not be felt in the exterior of the decor sheet. In addition, when the thickness of the base layer exceeds 5 mm, the overall thickness of the decor sheet becomes thick, which may limit the application and make handling difficult, which is not desirable.

In an exemplary embodiment of the present invention, the glossiness of the surface of the first coating layer at a gloss angle of 60° may be 10 or less, may be 1 to 10, and may be 1 to 5. When the surface of the first coating layer satisfies the gloss range of the gloss condition of 60°, the matte characteristics required for the decor sheet can be secured.

The gloss under the gloss 60° condition can be measured using a gloss meter according to ASTM D523, and is a value expressing the degree of gloss of the surface (GU: gloss unit). The lower the gloss, the closer it can be to matte.

In one embodiment of the present invention, the surface of the first coating layer has a wrinkled surface, and the roughness (Rz) of the surface of the first coating layer may be 3㎛ to 10㎛, and 3.5㎛ to 9㎛. It may be 4㎛ to 8㎛. When the roughness (Rz) range of the surface of the first coating layer is satisfied, not only can the matte characteristics required for the decor sheet be secured, but the surface of the first coating layer can have a soft touch.

The roughness (Rz) may be measured according to ISO 4287 and may also be referred to as ten point average roughness. More specifically, the roughness of the surface of the first coating layer is determined by taking a reference length (L) as the cross-sectional curve of the surface of the first coating layer and measuring the cross-sectional curve parallel to the average line of that portion with a straight line that does not cut transversely on the high side of the curved structure. It represents the deviation by measuring the distance between the peaks (ridges) from the 5th to the 5th and the valleys (valleys) from the deepest to the 5th, and is a value that expresses the degree of unevenness. At this time, the reference length (L) may be several millimeters, for example, in the range of about 0.1 mm to 1 mm, specifically about 0.8 mm.

The surface on which the wrinkles are formed is the opposite side of the surface provided with the base layer of the first coating layer. Due to the surface on which the wrinkles are formed, the roughness (Rz), glossiness, etc. of the surface of the above-described first coating layer can be satisfied.

The wrinkled surface means that the first coating layer includes wrinkles on at least one surface, and that the first coating layer has three-dimensional surface irregularities due to the wrinkles. For example, the surface has irregularities including large and small ridges, valleys, and wrinkles formed therefrom that can be recognized as a predetermined shape. Each of the ridges, valleys and wrinkles may have a regular or irregular shape. This wrinkled surface may also be referred to as a surface having a fine folding structure.

When observing the surface of the coating layer on which wrinkles are formed in the normal direction of the first coating layer, ridges, valleys, wrinkles, and irregularities formed therefrom are observed, for example, over the entire area of the surface during a curing process described later. .

The wrinkles may be observed in a form including a directional line shape (eg, a straight line, a curved line). For example, surface wrinkles formed by repeating straight and curved shapes may give a curved shape, such as a mountain range, to the surface of the first coating layer. In this way, the surface uneven structure formed by line-shaped wrinkles is clearly distinguished from the so-called point-wise uneven shape formed by using particles in the composition for forming a coating layer or using emulsion dispersion. do.

The surface of the first coating layer may include wrinkles that can be visually recognized as having a predetermined size and shape. More specifically, the wrinkles may have a width ranging from hundreds of nm to several tens of μm and a line (straight or curved) shape extending to a length ranging from several to hundreds of μm. The width of the wrinkle and the length to which the wrinkle extends can be confirmed from an image (eg, SEM) taken of the surface on which the wrinkle is formed, as shown in the attached drawing.

The ends of the wrinkles extending in the form of a straight line or a curve form a slope that gradually decreases in height and may be incorporated into the first coating layer. In some cases, the end of one wrinkle having the above size and shape may be the starting point of another wrinkle or a connection point with another wrinkle. In addition, when observing the cross-sectional curve near the wrinkle in the direction perpendicular to the direction of extension of the wrinkle, the width of the wrinkle gradually decreases in height in both directions starting from the point or part (e.g., ridge) that forms the height of the wrinkle. It forms an incline and can be incorporated into the coating layer. On the other hand, when a ridge and an adjacent valley form a wrinkle or a part thereof, the visible area of the shape including the valley can be viewed as the width of the wrinkle.

In one embodiment of the present invention, the surface of the first coating layer may have a dendrite shape, which is a radially curved structure with one point as the center and extending from the center to the periphery.

In one embodiment of the present invention, the first coating layer may be manufactured by coating a first solvent-free coating composition of a predetermined configuration on a base layer and then performing a transfer process using a release transfer film including a microfolding structure. there is.

The first coating layer may include a first solvent-free coating composition containing a monomer, an oligomer, and a photoinitiator, or a cured product thereof. That is, the composition may not contain organic solvents or aqueous solvents. When using the non-solvent coating composition, the solvent drying process can be omitted, thereby increasing process efficiency. In addition, when using the non-solvent coating composition, it is possible to prevent deterioration of surface properties due to bubbles generated when the solvent volatilizes during the solvent drying process.

In one embodiment of the present invention, the first coating layer may be a cured product of a composition containing a urethane (meth)acrylate-based oligomer.

The urethane (meth)acrylate-based oligomer can function advantageously in securing the strength of the coating layer and securing the flexibility of the coating layer through the unique elasticity of the urethane bond.

The urethane (meth)acrylate-based oligomer may be prepared by polymerizing compounds such as isocyanate, alcohol, and acrylate according to a known method to satisfy the functionality and/or molecular weight described later. For example, a polyisocyanate having three or more isocyanate groups is reacted with an acrylate having a hydroxyl group in the molecule and containing three or more acrylic groups under a metal catalyst and a radical polymerization inhibitor until the isocyanate (NCO) disappears. A urethane (meth)acrylate-based oligomer can be produced by adding 5 to 30 wt% of a UV curable monomer. Additionally, a urethane (meth)acrylate-based oligomer that satisfies the functionality and/or molecular weight described later may be selected and used from commercial products.

The urethane (meth)acrylate-based oligomer may have a weight average molecular weight (Mw) of 500 g/mol to 50,000 g/mol, 500 g/mol to 10,000 g/mol, and 800 g/mol to 8,000 g. It can be /mol. When using a urethane (meth)acrylate-based oligomer that satisfies the weight average molecular weight of the above range, it is possible to simultaneously improve the elongation of the coating layer and secure high hardness.

The composition for the first coating layer may include two or more types of urethane (meth)acrylate-based oligomers having different weight average molecular weights (Mw). For example, the composition for the coating layer includes a first urethane (meth)acrylate-based oligomer having a weight average molecular weight (Mw) of 5,000 g/mol to 20,000 g/mol, and a weight average molecular weight (Mw) of 1,000 g/mol to 5,000 g. /mol may include a second urethane (meth)acrylate-based oligomer. If only the first urethane (meth)acrylate-based oligomer with a relatively high molecular weight is used, the cured density may decrease and the cured structure may not be dense, resulting in low contamination resistance. To compensate for this, a second urethane (meth)acrylate-based oligomer having a relatively low weight average molecular weight may be used.

The urethane (meth)acrylate-based oligomer may include one or more photopolymerizable functional groups. More specifically, the urethane (meth)acrylate-based oligomer may be a monofunctional oligomer or a polyfunctional oligomer having two or more functional groups. The number of functional groups of the multifunctional oligomer is not particularly limited, but may be 2 to 15, or 2 to 10, considering elongation and surface hardness.

The first solvent-free coating composition may include two or more types of urethane (meth)acrylate-based oligomers having different numbers of functional groups. Additionally, the first solvent-free coating composition may include two or more types of polyfunctional urethane (meth)acrylate-based oligomers having different numbers of functional groups. Additionally, the first non-solvent coating composition may include two or more types of polyfunctional urethane (meth)acrylate oligomers having three or more functional groups.

The first urethane (meth)acrylate-based oligomer and the second urethane (meth)acrylate-based oligomer may each independently have 2 or 3 or more functional groups. More specifically, the number of functional groups in the first urethane (meth)acrylate-based oligomer and the second urethane (meth)acrylate-based oligomer may be independently 2 to 10, and 2 to 9, respectively.

The first solvent-free coating composition may further include a monomer component in addition to the urethane (meth)acrylate-based oligomer. Based on the total weight of the first solvent-free coating composition, the content of the urethane (meth)acrylate-based oligomer may be 20% by weight to 70% by weight, and may be 30% by weight to 60% by weight.

As the monomer component, monofunctional or multifunctional monomers may be used. For example, the monomer may be a (meth)acrylic monomer or a (meth)acrylic monomer having a polar functional group such as a hydroxy group, a nitrogen-containing functional group, an alkylene oxide group, etc. More specifically, the monomers include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, and 6-hydroxyhexyl (meth)acrylate. Rate, 8-hydroxyoxyl (meth)acrylate, (meth)acrylonitrile, N-methylacrylamide, (meth)acrylamide, alkyl (meth)acrylamide, dialkyl (meth)acrylamide, hydroxy alkyl (meth)acrylamide, N-butoxy methyl (meth)acrylamide, N-vinyl pyrrolidone, N-vinyl caprolactam, 2-aminoethyl (meth)acrylate, 3-aminoethyl (meth)acrylate, N,N-dimethylaminoethyl (meth)acrylate, N,N-dimethylaminopropyl (meth)acrylate, alkoxy alkylene glycol (meth)acrylic acid ester, alkoxy dialkylene glycol (meth)acrylic acid ester, alkoxy polyethylene glycol It may include one or more types of (meth)acrylic acid ester, etc., but is not limited thereto.

The monomer component may further include a multifunctional monomer. More specifically, the monomer component may further include a polyfunctional (meth)acrylate monomer having two or more reactive functional groups. The multifunctional (meth)acrylate monomers include cyclohexane dimethanol di(meth)acrylate, hexanediol di(meth)acrylate, tricyclodecane dimethanol di(meth)acrylate, and triethylene glycol di(meth)acrylate. Bifunctional (meth)acrylates such as acrylates, tetraethylene glycol di(meth)acrylate, butylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, polypropylene glycol di(meth)acrylate, etc. late monomer; Trimethylolpropane tri(meth)acrylate, glycerin tri(meth)acrylate, pentaerythritol tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propylated trimethylolpropane tri(meth)acrylate ) trifunctional (meth)acrylate monomers such as acrylate, glyceryl propylated tri(meth)acrylate, tris(2-hydroxyethyl)isocyanurate tri(meth)acrylate, etc.; tetra-functional (meth)acrylate monomers such as pentaerythritol tetra(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, etc.; Pentaerythritol penta(meth)acrylate, dipentaerythritol hydroxypenta(meth)acrylate, etc., pentafunctional (meth)acrylate monomers; A pentafunctional (meth)acrylate monomer such as dipentaerythritol hexa(meth)acrylate may be used.

The first solvent-free coating composition may further include a photoinitiator. As long as it is a photoinitiator that can be used in the curing process described later, the type is not particularly limited, and known commercial products can also be used.

In addition, the first solvent-free coating composition may further include one or more additives selected from initiators, dispersants, anti-foaming agents, wetting agents, and anti-foaming agents known in the art. The content of each additive may be appropriately used in a commonly used amount to achieve the desired effect. The initiator, dispersant, anti-foaming agent, wetting agent and anti-foaming agent can be any one that can be applied in the technical field belonging to the present invention.

In an exemplary embodiment of the present application, the first coating layer includes a first solvent-free coating composition or a cured product thereof including a monomer, an oligomer, and a photoinitiator, and the monomer is a monofunctional acrylate monomer and a bifunctional or more acrylic. It includes a rate-based monomer, and the oligomer includes a trifunctional or higher urethane-based oligomer.

In one embodiment of the present invention, the thickness of the first coating layer may be 5㎛ to 25㎛, 7㎛ to 20㎛, and 9㎛ to 18㎛. If the thickness of the first coating layer is less than 5㎛, it may be difficult for the first coating layer to have a wrinkled surface, and if it exceeds 25㎛, the overall thickness of the decor sheet may be thick, which may limit its use.

In an exemplary embodiment of the present application, the adhesion between the acrylic base layer and the first coating layer is 5B using a standard cross-cut method according to ASTM D3359. If the adhesion between the acrylic base layer and the first coating layer is less than 5B using the standard cross-cut method according to ASTM D3359, the first coating layer may lift off from the acrylic base layer, which is not desirable.

The adhesion between the acrylic base layer and the first coating layer can be measured using the standard crosscut method according to ASTM D3359, and more specifically, can be measured using Method 1 below.

[Method 1]

Using a cross cutter on the first coating layer, place it on a cutting guide or a suitable ruler and draw grid-like horizontal and vertical lines on the sample at 1mm intervals. Afterwards, the surface of the first coating layer was washed with a brush or dust-free cloth, then Ichiban tape (Sellotape manufactured by Nichiban Co., Ltd.) was applied, and the peeled surface was rapidly peeled off at a peeling angle of 180 degrees. How much did the first coating layer fall off? Observe with the naked eye. The degree of adhesion is classified from 0B to 5B according to the crosscut classification standard (ASTM D3359) in Table 1 below.

[Table 1]

The decor sheet according to an exemplary embodiment of the present invention has excellent stain resistance.

When evaluating contamination resistance according to DIN 68861:2011, part1, the degree of contamination for contaminants may be grade 4 or higher, preferably grade 5. Specifically, after exposing the decoration sheet according to the present invention to contaminants arbitrarily selected from mustard, wine, coffee, tea, water, ethanol, etc., the degree of damage to the surface was visually checked and graded from grade 1 (severe damage) to 5. It was graded as grade (no change). As a result, it was confirmed that the deco sheet of the present invention had a contamination level of 5. From this, it can be seen that the decor sheet according to the present invention has excellent stain resistance.

The decor sheet according to an exemplary embodiment of the present invention has excellent surface hardness.

When evaluating hardness according to DIN 6881:2013, part4, the hardness of the cured product may be 0.6 to 1.5N. Specifically, the hardness of the decor sheet of the present invention was measured according to the evaluation standard DIN 6881:2013, part 4. As a result, it was confirmed that the hardness was high, ranging from 0.6N to 1.5N.

In addition, the method for manufacturing a decor sheet according to an embodiment of the present invention includes preparing an acrylic base layer having an acid value of 1 mg KOH/g to 19 mg KOH/g, and a release transfer film including a microfolding structure. ; Coating a first solvent-free coating composition on the acrylic base layer; The fine folding structure of the release transfer film is brought into close contact with the coated first solvent-free coating composition, and the reverse image of the fine folding structure of the release transfer film is transferred to the surface of the coated first solvent-free coating composition, 1 forming a coating layer; and removing the release transfer film, wherein the adhesion between the acrylic base layer and the first coating layer is 5B using a standard cross-cut method according to ASTM D3359.

In the method of manufacturing a decor sheet according to an exemplary embodiment of the present invention, the contents of the acrylic base layer, the first coating layer, the first solvent-free coating composition, etc. are the same as described above.

Hereinafter, a method for manufacturing a release transfer film including the microfolding structure will be described.

The release transfer film includes a base layer; and a second coating layer provided on the base layer. Here, the type of base layer is not particularly limited. For example, the base layer may include polyvinyl chloride (PVC) or polyethylene terephthalate (PET). The thickness of the base layer is also not particularly limited. For example, the thickness of the base layer may be 30 μm or more, 40 μm or more, 50 μm or more, 60 μm or more, 70 μm or more, 80 μm or more, 90 μm or more, 100 μm or more, 110 μm or more, or 120 μm or more. . In addition, the thickness of the base layer may be 3,000 μm or less, 2,000 μm or less, 1,000 μm or less, 900 μm or less, 800 μm or less, 700 μm or less, 600 μm or less, 500 μm or less, 400 μm or less, or 300 μm or less. .

The method of manufacturing a release transfer film including the microfolding structure includes coating a second solvent-free coating composition on a base layer, and applying light (L1) of a predetermined wavelength to the second solvent-free coating composition coated on the base layer. ) a first light irradiation step of forming valleys having peaks and fine wrinkles on the surface of the coated second solvent-free coating composition by irradiating under inert gas conditions; And it may include a second light irradiation step of curing the second solvent-free coating composition by irradiating light (L2) with a longer wavelength than the light (L1) under air conditions.

The method of manufacturing a release transfer film including the microfolding structure may include applying a composition containing an oligomer component and a monomer component directly on a base layer and then performing primary and secondary curing. The primary curing and secondary curing may be referred to as a first light irradiation step and a second light irradiation step, respectively, and these curings have the same or different wavelength, light irradiation amount, and/or light irradiation time of the irradiated light. can be performed. At this time, the primary curing is performed under conditions that can form wrinkles while shrinking the surface of the second solvent-free coating composition coated on the base layer. Specific conditions are explained below.

The method of coating the second solvent-free coating composition on the base layer is not particularly limited. For example, Mayer, D-bar, rubber roll, G/V roll, air knife, slot die, etc. Coating of the second non-solvent type coating composition on the base layer can be performed using a known method.

The method of manufacturing a release transfer film including the microfolding structure includes a first light irradiation step of irradiating relatively short wavelength light (L1) to a second solvent-free coating composition coated on a base layer under inert gas conditions; and a second light irradiation step of curing the second solvent-free coating composition by irradiating light (L2) with a longer wavelength than the light (L1) under air conditions. Specifically, the method involves irradiating light (L1) of a predetermined wavelength to a second solvent-free coating composition coated on a base layer under inert gas conditions to form wrinkles on the surface of the coated second solvent-free coating composition. First light irradiation step; and a second light irradiation step of forming a second coating layer, which is a cured product of the second solvent-free coating composition, by irradiating light (L2) with a longer wavelength than the light (L1) under air conditions.

The device for irradiating light in each step is not particularly limited. For example, in the case where light with a wavelength of 300 nm or less is irradiated in the first light irradiation step and light with a wavelength of 400 nm or less is irradiated in the second light irradiation step. , known mercury or metal halide lamps, etc. can be used.

In the first light irradiation step, light is irradiated to the second solvent-free coating composition coated on the base layer, and the second solvent-free coating composition is coated with an excimer generated by the irradiated light (or light irradiation). This is a step to form wrinkles by shrinking the surface of the cured composition. The wrinkled surface increases the scattering of light incident on the surface, thereby imparting matte characteristics.

The wrinkled surface may have surface roughness and gloss characteristics as described above. Accordingly, in the present invention, a matting agent may not be used, or even if a matting agent is used, it may be used in a significantly lower amount compared to the prior art to achieve a matte effect.

In one example, in the first light irradiation step, high energy light with a wavelength of 300 nm or less, for example, light with a wavelength of 200 nm or less may be irradiated. Specifically, light with a wavelength of 130 nm or more, 140 nm or more, 150 nm or more, 160 nm or more, or 170 nm or more may be irradiated in the first light irradiation step. In one example, the upper limit of the wavelength of light irradiated in the first light irradiation step may be, for example, 200 nm or less, 190 nm or less, or 180 nm or less.

The first light irradiation step may be performed in an inert atmosphere. The gas used to create an inert atmosphere may be, for example, He, Ne, Ar, and/or N ₂ .

In one example, the inert atmosphere in which the first light irradiation step is performed may be an atmosphere in which the concentration of oxygen (O ₂ ) is about 4,000 ppm or less. Specifically, the upper limit of the oxygen concentration in the inert atmosphere may be 3,000 ppm or less, 2,500 ppm or less, 2,000 ppm or less, 1,500 ppm or less, or 1,000 ppm or less, and more specifically, 900 ppm or less, 800 ppm or less, 700 ppm or less, 600 ppm or less, and 500 ppm. It may be 400 ppm or less or 300 ppm or less. And the lower limit may be, for example, 50ppm or more, 100ppm or more, 200ppm or more, 300ppm or more, 400ppm or more, 500ppm or more, 600ppm or more, 700ppm or more, 800ppm or more, 900ppm or more, or 1,000ppm or more.

In one example, the inert atmosphere may be formed so that the concentration of oxygen in nitrogen gas (N ₂ ) satisfies the above range.

When the first light irradiation is performed under inert atmosphere conditions as described above, it is advantageous to secure the wrinkles and surface properties described above. For example, when the first light irradiation is performed in an inert atmosphere where the oxygen concentration exceeds the above range, it is difficult to form wrinkles as mentioned above, and the surface characteristics as above cannot be provided. For example, wrinkles may not be formed evenly over the entire surface to satisfy the characteristics described above, but may be rarely observed on the surface.

In one example, when performing the first light irradiation step, the distance between the composition and the light source, that is, the distance from the surface of the second solvent-free coating composition coated on the base layer to the light source, may be 5 mm or more. Specifically, the lower limit of the distance may be, for example, 10 mm or more, 15 mm or more, 20 mm or more, 25 mm or more, 30 mm or more, 35 mm or more, 40 mm or more, 45 mm or more, or 50 mm or more, The upper limit may be, for example, 90 mm or less, 85 mm or less, 80 mm or less, 75 mm or less, 70 mm or less, 65 mm or less, 60 mm or less, 55 mm or less, or 50 mm or less. In the first light irradiation step, when the distance between the second solvent-free coating composition and the light source is adjusted to the above range, an appropriate amount of light can reach the composition at an appropriate intensity, and as a result, a surface with wrinkles of the shape and size described above is formed. It is advantageous to form and secure surface properties (e.g., surface roughness, glossiness) of the level described above.

In one example, the amount of light irradiated in the first light irradiation step may be 1 mJ/cm2 or more than 5 mJ/cm2. Specifically, the lower limit of the light irradiation amount in the first light irradiation step may be, for example, 10 mJ/cm2 or more, 15 mJ/cm2 or more, 20 mJ/cm2 or more, 25 mJ/cm2 or more, or 30 mJ/cm2 or more. , and the upper limit is, for example, 100 mJ/cm2 or less, 90 mJ/cm2 or less, 80 mJ/cm2 or less, 70 mJ/cm2 or less, 60 mJ/cm2 or less, 50 mJ/cm2 or less, 40 mJ/cm2 or less. , may be 30 mJ/cm2 or less or 25 mJ/cm2 or less. In the first light irradiation step, when the light irradiation amount is adjusted to the above range, it is advantageous to form a surface with the above-described wrinkles and secure surface properties (e.g., surface roughness, glossiness) of the above-described level.

In one example, the time for which light is irradiated in the first light irradiation step is several seconds, for example, the upper limit may be 10 seconds or less or 5 seconds or less, and the lower limit may be, for example, 0.5 seconds or more or 1 second. It could be more than that. In the first light irradiation step, when the time for irradiating light is adjusted to the above range, a surface with wrinkles of the above-described shape and size is formed, and surface properties (e.g., surface roughness, glossiness) of the above-described degree are formed. ) is advantageous in securing.

At this time, the light irradiation time can be controlled by adjusting the movement speed of the resin composition irradiated with light. For example, the light irradiation time can be controlled while appropriately adjusting the moving speed of the base layer coated with the composition on the conveyor belt within the range of 1 m/min to 50 m/min.

The second light irradiation step is performed by applying light energy of a different wavelength from the first light irradiation step to the second solvent-free coating composition coated on the base layer and having wrinkles formed on the surface through the first light irradiation step. This is the step of completely curing the solvent-free coating composition.

In one example, in the second light irradiation step, light with a wavelength in the range of 200 nm to 400 nm may be irradiated. Specifically, the second light irradiation step may be a step of irradiating a wavelength of 210 nm or more, 220 nm or more, 230 nm or more, 240 nm or more, 250 nm or more, 260 nm or more, 270 nm or more, 280 nm or more, 290 nm or more, or 300 nm or more. The upper limit of the light wavelength irradiated in the second light irradiation step may be, for example, 350 nm or less, 340 nm or less, 330 nm or less, 320 nm or less, 310 nm or less, or 300 nm or less. The second non-solvent coating composition, which is cured to a certain level by the first light irradiation step and wrinkles are formed on the surface, can be cured in the direction of the applied thickness through the second light irradiation step in which a relatively long wavelength is irradiated. there is.

In one example, the second light irradiation step may be a step of irradiating light with a higher wavelength than the first light irradiation step in the wavelength range described above.

The second light irradiation step is performed in an air atmosphere. The curing rate of the composition can be improved through an air atmosphere, and the effect of cleaning the surface of the coating layer can be obtained by converting oxygen molecules (O ₂ ) into ozone (O ₃ ) during the irradiation process.

In one example, when performing the second light irradiation step, the distance between the second solvent-free coating composition and the light source, that is, the distance from the surface of the composition applied on the base layer to the light source, is 50 mm or less, 40 mm or less, and 30 mm or less. Or it may be 20 mm or less. Specifically, the upper limit of the distance is, for example, 19 mm or less, 18 mm or less, 17 mm or less, 16 mm or less, 15 mm or less, 14 mm or less, 13 mm or less, 12 mm or less, 11 mm or less, or 10 mm. It may be below, and the lower limit may be, for example, 0.5 mm or more, 1 mm or more, 2 mm or more, 3 mm or more, 4 mm or more, or 5 mm or more. In another example, the distance between the second solvent-free coating composition and the light source when performing the second light irradiation step may be smaller than that during the first light irradiation step. When the distance between the second non-solvent coating composition and the light source is adjusted to the above range during the second light irradiation, it is advantageous to increase the degree of curing of the entire coating layer.

In one example, the amount of light irradiated in the second light irradiation step may be greater than the amount of light irradiated in the first light irradiation step. For example, the amount of light irradiated in the second light irradiation step is 150 mJ/cm2 or more, specifically 160 mJ/cm2 or more, 170 mJ/cm2 or more, 180 mJ/cm2 or more, 190 mJ/cm2 or more, 200 mJ/cm2 or more. It may be mJ/cm2 or more, 210 mJ/cm2 or more, 220 mJ/cm2 or more, 230 mJ/cm2 or more, 240 mJ/cm2 or more, 250 mJ/cm2 or more, or 300 mJ/cm2 or more. And the upper limit is, for example, 500 mJ/cm2 or less or 400 mJ/cm2 or less, specifically, for example, 350 mJ/cm2 or less, 340 mJ/cm2 or less, 320 mJ/cm2 or less, 310 mJ/cm2 or less. Or it may be 300 mJ/cm2 or less. When the light irradiation amount is adjusted to the above range during the second light irradiation, it is advantageous to increase the degree of curing of the entire coating layer.

In one example, the time at which light is irradiated in the second light irradiation step may be the same as or different from the time at which light is irradiated in the first light irradiation step described above. Specifically, the time for which light is irradiated in the second light irradiation step is on the order of several seconds, for example, the upper limit may be 10 seconds or less or 5 seconds or less, and the lower limit may be, for example, 0.5 seconds or more or 1 second or more. there is.

When the first light irradiation and the second light irradiation are performed as described above, the surface of the coating layer may have a relatively dense curing density. Specifically, during the first light irradiation, light with a relatively high energy short wavelength (light of about 200 nm or less) acts in the vicinity of hundreds of nm near the surface of the coated coating layer, and then when the second light irradiation occurs, the surface of the coating layer becomes It has a dense hardening density. However, because the short wavelength light used for first light irradiation does not affect the inside of the coating layer, the curing density inside the coating layer may be relatively low. Therefore, the interior of the coating layer with a relatively low curing density can contribute to securing flexibility, and the surface of the coating layer with a dense curing state can maintain distinct wrinkles.

The method for manufacturing a decor sheet according to an embodiment of the present invention is to adhere the fine folding structure of the release transfer film to the coated first solvent-free coating composition, and to create a reverse image of the fine folding structure of the release transfer film. It includes transferring the coated first solvent-free coating composition to the surface to form a first coating layer.

The step of forming the first coating layer may further include curing the coated first solvent-free coating composition by irradiating ultraviolet rays under air conditions. Here, the light irradiation method may apply the conditions and method of the second light irradiation step of the release transfer film described above.

Through this, the reverse image of the microfolding structure formed on the release transfer film can be transferred to the decor sheet. The microfolding structure of the release transfer film includes a peak portion and a valley portion, the area of the valley portion is relatively large, and fine wrinkles are formed in the valley portion. The first coating layer of the decor sheet formed by reversing this fine folding structure includes ridges and valleys. That is, the portion corresponding to the peak portion of the release transfer film forms a valley in the deco sheet. Additionally, the portion corresponding to the valley portion of the release transfer film forms a ridge in the deco sheet. Fine wrinkles formed in the valley portion of the release transfer film may be transferred and formed on the crest of the decor sheet.

In the method of manufacturing a decor sheet according to an embodiment of the present invention, the method of removing the release transfer film is not particularly limited, and methods known in the art can be used.

Hereinafter, the present invention will be described in detail with reference to examples. However, the embodiments according to the present invention may be modified into various other forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

<Example>

<Example 1>

As an acrylic base layer, 2 mm thick polymethyl methacrylate (PMMA) with an acid value of 12 mg KOH/g was extruded and prepared. The acid value of the acrylic base layer was measured according to KS M 5000-2231 standard.

As a release transfer film, the second non-solvent type coating composition was coated on a 50㎛ thick polyethylene terephthalate (PET) film. At this time, the second non-solvent coating composition includes 20 parts by weight of Caprolactone Acrylate, 30 parts by weight of Tripropylene glycol Diacrylate, 20 parts by weight of bifunctional aliphatic urethane acrylate oligomer with a weight average molecular weight of 10,000 g/mol, and a weight average molecular weight of 30,000 g/mol. It contained 30 parts by weight of mol trifunctional aliphatic acrylate oligomer and 5 parts by weight of Irgacure 1173 as a photoinitiator.

After coating the second non-solvent coating composition, a short wavelength of 172 nm was irradiated for 1 second under an inert gas to form fine wrinkles. Afterwards, the second light irradiation (mercury lamp) was performed at a light intensity of 500 mJ/cm ² for 5 seconds to completely cure the surface of the coating layer, and finally, a release transfer film including a second coating layer with a fine folding structure was manufactured. did. At this time, the thickness of the prepared second coating layer was 5㎛. Additionally, the surface of the second coating layer of the release transfer film is shown in Figure 2 below.

The first solvent-free coating composition was coated on the acrylic base layer. At this time, the first solvent-free coating composition contains 15 parts by weight of Tetrahydrofurfuryl Acrylate, a monofunctional monomer, 15 parts by weight of Tripropylene glycol Diacrylate, a bifunctional monomer, and 20 parts by weight of Trimethylolpropane (EO)3 Triacrylate, a trifunctional monomer, with a weight average molecular weight. It contained 15 parts by weight of 15,000 g/mol 12-functional urethane oligomer acrylate, 15 parts by weight of 4-functional urethane oligomer acrylate with a weight average molecular weight of 30,000 g/mol, and 5 parts by weight of Irgacure 754 as a photoinitiator.

A release transfer film is laminated on the coated first solvent-free coating composition so that the second coating layer of the fine folding structure is in close contact, and then irradiated with UV at a light quantity of 500 mJ/cm ² for 5 seconds using a mercury lamp, A first coating layer with a thickness of 10 μm having a reversed pattern of the fine folding structure on the surface was formed.

Afterwards, the release transfer film was removed, and post-curing was performed using a mercury lamp at a light intensity of 800 mJ/cm ² for 5 seconds to prepare a decor sheet with a first coating layer formed on an acrylic base layer. Additionally, the surface of the first coating layer of the decor sheet is shown in Figure 1 below.

<Example 2>

As an acrylic base layer, 2 mm thick polymethyl methacrylate (PMMA) with an acid value of 9 mg KOH/g was extruded and prepared. The acid value of the acrylic base layer was measured according to KS M 5000-2231 standard.

As a release transfer film, the second non-solvent type coating composition was coated on a 50㎛ thick polyethylene terephthalate (PET) film. At this time, the second non-solvent coating composition includes 20 parts by weight of Caprolactone Acrylate, 30 parts by weight of Tripropylene glycol Diacrylate, 20 parts by weight of bifunctional aliphatic urethane acrylate oligomer with a weight average molecular weight of 10,000 g/mol, and a weight average molecular weight of 30,000 g/mol. It contained 30 parts by weight of mol trifunctional aliphatic acrylate oligomer and 5 parts by weight of Irgacure 1173 as a photoinitiator.

After coating the second non-solvent coating composition, a short wavelength of 172 nm was irradiated for 1 second under an inert gas to form fine wrinkles. Afterwards, the second light irradiation (mercury lamp) was performed at a light intensity of 500 mJ/cm ² for 5 seconds to completely cure the surface of the coating layer, and finally, a release transfer film including a second coating layer with a fine folding structure was manufactured. did. At this time, the thickness of the prepared second coating layer was 5㎛. Additionally, the surface of the second coating layer of the release transfer film is shown in Figure 3 below.

The first solvent-free coating composition was coated on the acrylic base layer. At this time, the first solvent-free coating composition contains 20 parts by weight of Isooctyl acrylate, a monofunctional monomer, 5 parts by weight of Butanediol Diacrylate, a bifunctional monomer, and 25 parts by weight of dipentaerythritol pentaacrylate, a pentafunctional monomer, and a weight average molecular weight of 5,000. It contained 20 parts by weight of hexa-functional urethane oligomer acrylate of g/mol, 15 parts by weight of ten-functional urethane oligomer acrylate of weight average molecular weight of 15,000 g/mol, and 5 parts by weight of Irgacure 754 as a photoinitiator.

A release transfer film is laminated on the coated first solvent-free coating composition so that the second coating layer of the fine folding structure is in close contact, and then UV is irradiated at an amount of 500 mJ/cm ² for 5 seconds using a mercury lamp, A first coating layer with a thickness of 10 μm having a reversed pattern of the fine folding structure on the surface was formed.

Afterwards, the release transfer film was removed, and post-curing was performed using a mercury lamp at a light intensity of 800 mJ/cm ² for 5 seconds to prepare a decor sheet with a first coating layer formed on an acrylic base layer. Additionally, the surface of the first coating layer of the decor sheet is shown in Figure 4 below.

<Comparative Example 1>

As an acrylic base layer, a 2 mm thick polymethyl methacrylate (PMMA) with an acid value of 0 mg KOH/g was extruded and prepared. The acid value of the acrylic base layer was measured according to KS M 5000-2231 standard.

As a release transfer film, the second non-solvent type coating composition was coated on a 50㎛ thick polyethylene terephthalate (PET) film. At this time, the second non-solvent coating composition includes 20 parts by weight of Caprolactone Acrylate, 30 parts by weight of Tripropylene glycol Diacrylate, 20 parts by weight of bifunctional aliphatic urethane acrylate oligomer with a weight average molecular weight of 10,000 g/mol, and a weight average molecular weight of 30,000 g/mol. It contained 30 parts by weight of mol trifunctional aliphatic acrylate oligomer and 5 parts by weight of Irgacure 1173 as a photoinitiator.

After coating the second non-solvent coating composition, a short wavelength of 172 nm was irradiated for 1 second under an inert gas to form fine wrinkles. Afterwards, the second light irradiation (mercury lamp) was performed at a light intensity of 500 mJ/cm ² for 5 seconds to completely cure the surface of the coating layer, and finally, a release transfer film including a second coating layer with a fine folding structure was manufactured. did. At this time, the thickness of the prepared second coating layer was 5㎛.

The first solvent-free coating composition was coated on the acrylic base layer. At this time, the first solvent-free coating composition contains 20 parts by weight of Isooctyl acrylate, a monofunctional monomer, 5 parts by weight of Butanediol Diacrylate, a bifunctional monomer, and 25 parts by weight of dipentaerythritol pentaacrylate, a pentafunctional monomer, and a weight average molecular weight of 5,000. It contained 20 parts by weight of hexa-functional urethane oligomer acrylate of g/mol, 15 parts by weight of ten-functional urethane oligomer acrylate of weight average molecular weight of 15,000 g/mol, and 5 parts by weight of Irgacure 754 as a photoinitiator.

A release transfer film is laminated on the coated first solvent-free coating composition so that the second coating layer of the fine folding structure is in close contact, and then UV is irradiated using a mercury lamp at an amount of 500 mJ/cm ² for 5 seconds, A first coating layer with a thickness of 10 μm having a reversed pattern of the fine folding structure on the surface was formed.

Afterwards, the release transfer film was removed, and post-curing was performed using a mercury lamp at a light intensity of 800 mJ/cm ² for 5 seconds to prepare a decor sheet with a first coating layer formed on an acrylic base layer.

<Experimental Example 1>

Py-GC/MS analysis at 600°C was performed to analyze the components of the acrylic base layer applied in Example 1 and Comparative Example 1, respectively. More specifically, the Py-GC/MS measurement results of the acrylic base layer applied in Example 1 are shown in Figure 5, and the Py-GC/MS measurement results of the acrylic base layer used in Comparative Example 1 are shown in Figure 6 below. shown in

As shown in Figure 5 below, the acrylic base layer with an acid value of 12 mg KOH/g applied in Example 1 of the present invention was composed of MA (methyl acrylate), MMA (methyl methacrylate), MAA (methacrylic acid), BA (butyl acrylate), and STYLE. The component styrene was detected. In addition, as shown in Figure 6 below, the acrylic base layer with an acid value of 0 mg KOH/g applied in Comparative Example 1 of the present invention had components of MA (methyl acrylate) and MMA (methyl methacrylate) detected, and did not contain an acid functional group. can confirm.

<Experimental Example 2>

The properties of the second coating layer of the release transfer film of Examples 1 and 2 were evaluated and are shown in Table 2 below. In addition, the properties of the first coating layer of the decor sheets of Examples 1 and 2 and Comparative Example 1 were evaluated and are shown in Table 3 below.

[Table 2]

[Table 3]

The characteristic evaluation method in Tables 2 and 3 above is as follows.

<Adhesion>

The adhesion was measured between the acrylic base layer and the first coating layer, and was measured using the standard crosscut method according to ASTM D3359. More specifically, it was measured using Method 1 above.

<Viscosity (cps)>

The viscosity was measured with a viscometer (DV3T Rheometer, Brookfield) at room temperature.

<Glossiness>

The gloss was measured under gloss conditions of 60°, and was measured using a gloss meter according to ASTM D523.

<Illuminance (Rz, ㎛)>

The roughness was measured according to ISO 4287 as a 10-point average roughness. The reference length (L, 0.8mm) is taken as the cross-sectional curve of the surface of the first coating layer or the second coating layer, and the cross-sectional curve is parallel to the average line of the portion, with a straight line that does not cut transversely. The peak from the high side of the curved structure to the fifth. The distance between the ridge and the fifth valley from the deep side was measured to indicate the deviation.

<Average thickness (㎛)>

The average thickness of the coating layer was calculated by averaging 10 points through SEM analysis of the cross-section of the substrate.

<Hardness (N)>

The hardness was measured according to the evaluation standard DIN 6881:2013, part 4.

<Contamination resistance>

The fouling resistance was evaluated according to DIN 68861:2011, part 1. After exposure to contaminants such as coffee, tea, water, wine, mustard, or ethanol, the degree of surface damage was visually confirmed and graded from grade 1 (severe damage) to grade 5 (no change).

As shown in the above results, the decor sheet according to an exemplary embodiment of the present invention has excellent stain resistance and matte characteristics.

In particular, the decor sheet according to an embodiment of the present invention, even when applying a relatively thick acrylic base layer compared to the conventional PET base layer, by applying an acrylic base layer with an acid value of 1 mg KOH/g to 19 mg KOH/g , It has the characteristic of excellent adhesion between the acrylic base layer and the coating layer.

Therefore, the decor sheet according to an exemplary embodiment of the present invention has both the depth of glass and the matte characteristics, so it can be applied as a surface decoration material for various furniture.

Claims (17)

An acrylic base layer having an acid value of 1 mg KOH/g to 19 mg KOH/g; and
It is provided on the acrylic base layer and includes a first coating layer including a fine folding structure,
A decor sheet wherein the adhesion between the acrylic base layer and the first coating layer is 5B using a standard cross-cut method according to ASTM D3359. The decor sheet according to claim 1, wherein the acrylic base layer is manufactured by polymerizing a monomer having an acid functional group with an acrylic resin. The decor sheet according to claim 2, wherein the monomer having an acid functional group includes at least one of carboxylic acid monomer, maleic acid monomer, and phosphate monomer. The decor sheet according to claim 1, wherein the acrylic base layer includes an acrylic resin grafted with an acid functional group. The decor sheet according to claim 1, wherein the acrylic base layer is a polymethyl methacrylate (PMMA) sheet. The decor sheet according to claim 1, wherein the acrylic base layer has a thickness of 0.3 mm to 5 mm. The decor sheet according to claim 1, wherein the gloss of the surface of the first coating layer is 10 or less under a gloss of 60°. The method according to claim 1, wherein the fine folding structure has a wrinkled structure,
A decor sheet wherein the roughness (Rz) of the surface of the first coating layer is 3㎛ to 10㎛. The method according to claim 1, wherein the first coating layer includes a first solvent-free coating composition containing a monomer, an oligomer, and a photoinitiator, or a cured product thereof,
The monomers include monofunctional acrylate monomers and bifunctional or higher acrylate monomers,
The oligomer is a decor sheet containing a trifunctional or higher urethane (meth)acrylate-based oligomer. Preparing an acrylic base layer having an acid value of 1 mg KOH/g to 19 mg KOH/g and a release transfer film including a microfolding structure, respectively;
Coating a first solvent-free coating composition on the acrylic base layer;
The microfolding structure of the release transfer film is brought into close contact with the coated first solvent-free coating composition, and the reverse image of the microfolding structure of the release transfer film is transferred to the surface of the coated first solvent-free coating composition. 1 forming a coating layer; and
Comprising the step of removing the release transfer film,
A method of manufacturing a decor sheet, wherein the adhesion between the acrylic base layer and the first coating layer is 5B by a standard cross-cut method according to ASTM D3359. The method of claim 10, wherein the acrylic base layer is manufactured by polymerizing a monomer having an acid functional group with an acrylic resin. The method of claim 11, wherein the monomer having an acid functional group includes at least one of carboxylic acid monomer, maleic acid monomer, and phosphate monomer. The decor sheet according to claim 10, wherein the acrylic base layer includes an acrylic resin grafted with an acid functional group. The method of claim 10, wherein the acrylic base layer is a polymethyl methacrylate (PMMA) sheet. The method of claim 10, wherein the acrylic base layer has a thickness of 0.3 mm to 5 mm. The method of claim 10, wherein the first solvent-free coating composition includes a monomer, an oligomer, and a photoinitiator,
The monomers include monofunctional acrylate monomers and bifunctional or higher acrylate monomers,
The method of producing a decor sheet wherein the oligomer includes a trifunctional or higher urethane (meth)acrylate-based oligomer. The method of claim 10, wherein forming the first coating layer comprises:
A method for producing a decor sheet, further comprising the step of curing the coated first solvent-free coating composition by irradiating ultraviolet rays under air conditions.