Decoration sheet with metal-like texture and manufacturing method therefor

Abstract

A decoration sheet with a metal-like texture according to an embodiment of the present invention comprises a first skin layer, a base layer, and a second layer, which are sequentially laminated, the first and second skin layers being formed of polyethylene terephthalate glycol and a first master batch containing polyethylene terephthalate glycol, metal particles, and a pigment material, the base layer being formed through amorphous polyethylene terephthalate and a second master batch of a non-metallic material, wherein the first master batch and the second master batch have a color tone difference of 1 or less, so that a decoration sheet with a metal-like texture having uniform color tone across the width of the sheet and a manufacturing method therefor can be provided.

Description

Metallic textured decorative sheet and manufacturing method thereof

[0001] The present invention relates to a decorative sheet having a metallic texture and a method for manufacturing the same, and more specifically, to a decorative sheet having a metallic texture and having a uniform color tone across the width of the sheet and used as an interior / exterior building material, a flooring material, or other decorative purposes, and a method for manufacturing the same.

[0002] In general, Decoration Sheet is a sheet with various colors and patterns that is attached to the surface of various office / residential furniture such as wardrobes or desks, or to the surface of building materials and interior design to provide various visual / tactile effects to the user.

[0003] These decorative sheets are manufactured by manufacturing plastic resins, such as polyvinyl chloride or polypropylene, into sheets and applying various colors and patterns. As the application areas of these decorative sheets with specific colors and patterns are gradually expanding, decorative sheets that, in addition to providing simple colors and patterns, impart diverse visual effects to their surfaces through the application of additional materials are being used. They are widely used in indoor spaces as various interior decoration items.

[0004] Among decorative sheets with various visual effects, decorative sheets with a metallic texture are widely used. Typically, these decorative sheets are formed by laminating a metal-based film onto a substrate film to create a metallic texture. However, decorative sheets formed by laminating the deposited film in this manner have issues such as peeling due to the release material used during lamination of the deposited film, increased costs due to increased processing steps, and difficulties in achieving the required physical properties and quality.

[0005] To improve this problem, a method of applying metal particles to the inside of the skin layer located on the surface of a three-layer decorative sheet (skin layer / core layer / skin layer) and then extruding it is also being used. However, in the case of a multi-layer decorative sheet, the ratio of the skin layer applied with metal particles becomes relatively high at both edges of the sheet during the extrusion process, which causes a color difference between the widths within the decorative sheet. In order to prevent this color difference, it is generally attempted to improve it by injecting dyes or pigments of the same composition into the skin layer and the core layer, but the color difference is not sufficiently improved due to insufficient hiding power. To solve this problem, it is required to use titanium dioxide (TiO2) to provide hiding power, but when metal particles and titanium dioxide are injected together, there is a problem that the effect of having a metallic texture by the metal particles is not properly implemented due to the relatively fine particles of titanium dioxide.

[0006] In order to solve the problem of titanium dioxide not having a metallic texture effect, a method is being developed in which titanium dioxide is used in the base layer, not the skin layer, of a three-layer decorative sheet to provide hiding power to the decorative sheet, and metal particles with insufficient hiding power are injected into the skin layer to provide the metallic texture effect. However, even when titanium dioxide is used only in the base layer, not the skin layer, there is a problem in that the problem of color tone deviation across the width of the decorative sheet, which occurs due to the relatively high ratio of skin layers at both edges during extrusion during the manufacturing process of the decorative sheet, is not properly solved.

[0007] The present invention has been devised to solve the above problems and to meet the conventional requirements, and the problem to be solved by the present invention is to provide a metallic textured decorative sheet having a uniform color tone across the width of the sheet and a method for manufacturing the same by resolving the phenomenon of color tone deviation across the width of the sheet caused by the phenomenon of the proportion of the skin layer being relatively high at the edge portion during extrusion of a polyester decorative sheet having a multilayer structure.

[0008] The above and other objects and advantages of the present invention will become apparent from the following description of preferred embodiments.

[0009] The above object is achieved by sequentially stacking a first skin layer, a substrate layer, and a second skin layer, wherein the first skin layer and the second skin layer are formed from a first master batch containing polyethylene terephthalate glycol, metal particles, and a pigment material, and polyethylene terephthalate glycol, the substrate layer is formed from a second master batch of amorphous polyethylene terephthalate and a non-metal, and the first master batch and the second master batch are a metal-textured decorative sheet having a color deviation (ΔE) of 1.0 or less calculated from Equation 1.

[0010] (Formula 1)

[0011] ΔE* ab = [(ΔL*) 2 + (Δa*) 2 + (Δb*) 2 ] 1 / 2

[0012] Here, L* is the lightness index, and a* and b* are the chromaticity indices.

[0013] Preferably, the first skin layer and the second skin layer may comprise 70 to 90 wt% of polyethylene terephthalate glycol and 10 to 30 wt% of the first masterbatch.

[0014] Preferably, the first masterbatch may contain 85 to 93.25 wt% of polyethylene terephthalate glycol, 6 to 10 wt% of metal particles, and 0.75 to 5 wt% of a pigment substance.

[0015] Preferably, the metal particles may include at least one selected from chromium (Cr), nickel (Ni) and aluminum (Al).

[0016] Preferably, the coloring matter may include at least one selected from among dyes and pigments.

[0017] Preferably, the pigment may include at least one selected from titanium dioxide and carbon black.

[0018] Preferably, the substrate layer may comprise 70 to 95 wt% of amorphous polyethylene terephthalate and 5 to 30 wt% of the second masterbatch.

[0019] Preferably, the second master batch may comprise 50 to 95 wt% of polyethylene terephthalate and 5 to 50 wt% of a non-metallic pigment.

[0020] Preferably, the metal textured decorative sheet may have a color difference (ΔE) between the center and the edge calculated from Equation 1 of less than 1.0.

[0021] Preferably, the metal textured decorative sheet may have a light transmittance of 5.0 or less.

[0022] Preferably, the thickness of the first skin layer and the second skin layer may be 0.01 to 0.04 mm, and the thickness of the substrate layer may be 0.17 to 0.77 mm.

[0023] Preferably, the thickness ratio of the first skin layer, the second skin layer, and the substrate layer may be 1:5 to 1:77.

[0024] Preferably, the composition may further include a UV hard coating layer formed by applying and curing a UV curable composition containing a urethane acrylate oligomer and an acrylate monomer on the first skin layer or the second skin layer.

[0025] Preferably, the UV hard coating layer may have at least one form selected from a matte pattern, an anti-fingerprint pattern, a general matte pattern, and a glossy pattern.

[0026] In addition, the above object is achieved by a method for manufacturing a metal textured decorative sheet, including a first step of manufacturing a first masterbatch containing polyethylene terephthalate glycol, metal particles, and a pigment substance, a second step of manufacturing a second masterbatch containing polyethylene terephthalate and a non-metallic pigment, a third step of manufacturing a raw material for a skin layer by mixing polyethylene terephthalate glycol and the first masterbatch, a fourth step of manufacturing a raw material for a substrate layer by mixing polyethylene terephthalate and the second masterbatch, a fifth step of melting the raw material for the skin layer in a high-temperature extrusion cylinder and feeding it into a sub-extruder and melting the raw material for the substrate layer and feeding it into a main extruder to extrude them respectively, a sixth step of co-extruding the extruded skin layer raw material and the raw material for the substrate layer in a T-Die having a multilayer structure to manufacture a decorative sheet with a laminated structure of a first skin layer / substrate layer / second skin layer, and a seventh step of cooling the decorative sheet by passing it through a cooling roll.

[0027] Preferably, in the second step, the non-metallic pigment content of the second master batch may be adjusted so that the color difference (ΔE) between the first master batch and the second master batch becomes 1.0 or less.

[0028] Preferably, a UV curable composition containing a urethane acrylate oligomer and an acrylate monomer is applied on the first skin layer or the second skin layer, and then the irradiation dose is 200 mj / cm 2 It may further include an eighth step of forming a UV hard coating layer by curing with UV.

[0029] According to the metal textured decorative sheet according to the present invention, by using a non-metallic masterbatch (second masterbatch) having the same color tone data (colorimetric value) as the metal masterbatch (first masterbatch) applied to the first skin layer and the second skin layer in the base layer, a metal textured decorative sheet having a uniform color tone across the width of the sheet and a method for manufacturing the same can be provided.

[0030] However, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

[0031] FIG. 1 is a cross-sectional view of a metal textured decorative sheet according to one embodiment of the present invention.

[0032] Figure 2 is a cross-sectional view of a metal textured decorative sheet according to another embodiment of the present invention.

[0033] Figure 3 is a flow chart showing a method for manufacturing a metal textured decorative sheet according to one embodiment of the present invention.

[0034] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In the event of a conflict, the present specification, including its definitions, will govern. Furthermore, although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention, suitable methods and materials are described herein.

[0036] In this specification, the terms "~-based resin", "~-based polymer", or / and "~-based copolymer" are broad concepts encompassing all of "~ resin", "~ polymer", "~ copolymer", or / and "derivatives of ~ resin, polymer, or copolymer." In addition, in this specification, the term "polymer or copolymer crosslinked with these resins" means "polymer or copolymer crosslinked with the aforementioned resin."

[0037] In this specification, “compound” is a broad concept that includes “monatomic molecules,” “oligomers,” and “polymer compounds including homopolymers and copolymers.”

[0038] The term "including" in this specification means that other components may be included rather than excluding other components unless specifically stated to the contrary.

[0039] The term "combination of these" in this specification means a mixture or combination of one or more of the described components.

[0040] As used herein, the term "and / or" is meant to include any and all combinations of one or more of the items described herein. As used herein, the term "or" means "and / or." The expressions "at least one" or "one or more" preceding elements herein may supplement the entire list of elements and do not imply that they supplement individual elements described above.

[0041] Unless otherwise stated herein, all percentages, parts, ratios, etc. are by weight. Additionally, whenever an amount, concentration, or other value or parameter is given as a range, a preferred range, or a list of upper preferred values ​​and lower preferred values, this should be understood to specifically disclose all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed.

[0042] When a range of numerical values ​​is mentioned in this specification, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range. The scope of the present invention is not intended to be limited to the specific values ​​mentioned when defining the range.

[0043] In this specification, each component is a concept that includes both singular and plural.

[0044] FIG. 1 is a cross-sectional view of a metal textured decorative sheet according to one embodiment of the present invention.

[0045] Referring to FIG. 1, a metal textured decorative sheet according to one embodiment of the present invention includes a first skin layer (110), a second skin layer (120), and a substrate layer (130), and has a structure in which the first skin layer (110), the substrate layer (130), and the second skin layer (120) are sequentially laminated.

[0046] 1. First skin layer (110) and second skin layer (120)

[0047] It is preferable that the first skin layer (110) and the second skin layer (120) include polyethylene terephthalate glycol (PETG), metal particles, and a pigment material. At this time, in order to smoothly supply the polyethylene terephthalate glycol (PETG), metal particles, and pigment material to a feeder when forming the first skin layer (110) and the second skin layer (120), it is preferable to supply them in the form of chips. However, although polyethylene terephthalate glycol (PETG) is easy to process into a chip form, it is difficult to process the metal particles and pigment material into a chip form, and therefore it is preferable to first process the metal particles and pigment material together with polyethylene terephthalate glycol (PETG) into a chip form to form a first master batch (metal master batch) and use it. Accordingly, in the present invention, the first skin layer (110) and the second skin layer (120) are preferably formed of a first masterbatch (metal masterbatch) containing polyethylene terephthalate glycol (PETG), metal particles, and a pigment material, and polyethylene terephthalate glycol.

[0048] As an example, polyethylene terephthalate glycol (PETG) used in the first skin layer (110) and the second skin layer (120) is an amorphous resin copolymerized with terephthalic acid (TPA), ethylene glycol (EG), and cyclohexanedimethanol (CHDM), and has excellent processability, moldability, and printability, no deformation due to shrinkage, excellent impact resistance, and does not generate chlorine gas when incinerated or in a fire, and does not contain harmful substances such as environmental hormones, so it is suitable for the present invention used as a decorative sheet.

[0049] As an example, it is preferable that the metal particles included in the first skin layer (110) and the second skin layer (120) include at least one selected from chromium (Cr), nickel (Ni), and aluminum (Al).

[0050] As an example, it is preferred that the coloring matter comprises at least one selected from among a dye and a pigment. Furthermore, as an example, it is preferred that the pigment comprises at least one selected from among titanium dioxide and carbon black.

[0051] As an example, it is preferable that the first skin layer (110) and the second skin layer (120) include 70 to 90 wt% of polyethylene terephthalate glycol and 10 to 30 wt% of the first master batch. If the content of polyethylene terephthalate glycol in the first skin layer (110) and the second skin layer (120) is less than 70 wt% and the content of the first master batch is more than 30 wt%, the influence of the metal particles increases, which reduces the contact ability with the cooling roll, resulting in a problem that is disadvantageous for surface forming. If the content of polyethylene terephthalate glycol is more than 90 wt% and the content of the first master batch is less than 10 wt%, there is a problem that the effect of having a metallic texture is insufficient.

[0052] As an example, the first masterbatch preferably contains 85 to 93.25 wt% of polyethylene terephthalate glycol, 6 to 10 wt% of metal particles, and 0.75 to 5 wt% of a pigment. If the content of polyethylene terephthalate glycol in the first masterbatch is less than 85 wt% and the metal particles are excessive, there is a problem with particle dispersion during the manufacture of the masterbatch, and if the content of polyethylene terephthalate glycol exceeds 93.25 wt% and the metal particles are insufficient, there is a problem with the effect of having a metallic texture being minimal.

[0053] In addition, if the metal particle content in the first master batch is less than 6 wt%, there is a problem of insufficient metal texture effect, and if it exceeds 10 wt%, there is a problem with particle dispersion during the manufacture of the master batch.

[0054] In addition, if the pigment content in the first masterbatch is less than 0.75 wt%, it is difficult to implement various colors, and if it exceeds 5 wt%, there is a problem of unnecessary increase in cost and deterioration of sheet properties.

[0055] Accordingly, as described above, it is preferable that the first skin layer (110) and the second skin layer (120) contain 0.6 to 3.14 parts by weight of metal particles and 0.08 to 1.57 parts by weight of pigment material per 100 parts by weight of polyethylene terephthalate glycol.

[0056] As an example, the thickness of the first skin layer (110) and the second skin layer (120) is preferably 0.01 to 0.04 mm. If the thickness of the first skin layer (110) and the second skin layer (120) is less than 0.01 mm, the skin layer including PETG has a thin thickness, which causes problems in post-processing such as coating and adhesion. If it exceeds 0.04 mm, there is a problem of increased manufacturing cost due to increased content of expensive PETG and metal particles. In particular, the PETG constituting the first skin layer (110) and the second skin layer (120) plays a role in strengthening the adhesive strength with the polyurethane resin (PUR) adhesive or UV coating layer used when attaching the decorative sheet, and if it has an excessively thin thickness of less than 0.01 mm, there is a problem of insufficient adhesive strength.

[0057] As an example, the first skin layer (110) and the second skin layer (120) may be formed to have different configurations within a range satisfying the configuration of the present invention. That is, the first skin layer (110) and the second skin layer (120) are formed of a first masterbatch (metal masterbatch) including polyethylene terephthalate glycol (PETG), metal particles, and a pigment material, and polyethylene terephthalate glycol, and may be configured to have different contents, thicknesses, and pigment materials within the above content range and thickness range in consideration of productivity, color implementation, and metal texture effect.

[0058] 2. Substrate layer (130)

[0059] The substrate layer (130) includes amorphous polyethylene terephthalate and a non-metallic pigment. At this time, in order to smoothly supply the polyethylene terephthalate and the non-metallic pigment to the feeder when forming the substrate layer (130), it is preferable to supply them in the form of chips. However, unlike polyethylene terephthalate, it is difficult to process the non-metallic pigment alone into a chip form, so it is preferable to process the polyethylene terephthalate and the non-metallic pigment together into a chip form to form and use the second master batch (non-metallic master batch). Accordingly, in the present invention, the substrate layer (130) includes amorphous polyethylene terephthalate and the second master batch (non-metallic master batch), and the second master batch includes polyethylene terephthalate and the non-metallic pigment.

[0060] The second masterbatch included in the substrate layer (130) has the same color difference value as the first masterbatch included in the first skin layer (110) and the second skin layer (120). More specifically, it is preferable that the second masterbatch included in the substrate layer (130) has a color difference (ΔE) of 1.0 or less according to the mathematical expression 1 described below compared to the first masterbatch included in the first skin layer (110) and the second skin layer (120).

[0061] The non-metallic pigment included in the second master batch of the substrate layer (130) may include pigments and dyes other than metallic substances, and the non-metallic pigments and dyes used here may be any non-metallic material capable of imparting color to a sheet or film without limitation.

[0062] As an example, it is preferable that the substrate layer (130) contains 70 to 95 wt% of amorphous polyethylene terephthalate and 5 to 30 wt% of the second masterbatch. If the amorphous polyethylene terephthalate content in the substrate layer (130) is less than 70 wt%, the second masterbatch content is excessive, which causes an unnecessary increase in cost, and if the amorphous polyethylene terephthalate content exceeds 95 wt% and the second masterbatch content is insufficient, there is a problem of reduced hiding power.

[0063] As an example, the second master batch preferably contains 50 to 95 wt% of polyethylene terephthalate and 5 to 50 wt% of a non-metallic pigment. If the non-metallic pigment content in the second master batch is less than 5 wt%, there is a problem of reduced hiding power, and if it exceeds 50 wt%, there is a problem of unnecessary increase in cost.

[0064] Accordingly, as described above, it is preferable that the substrate layer (130) contain 0.25 to 17.7 parts by weight of a non-metallic pigment per 100 parts by weight of polyethylene terephthalate.

[0065] As an example, the thickness of the substrate layer (130) is preferably 0.17 to 0.77 mm. If the thickness of the substrate layer (130) is less than 0.17 mm, the film strength may be reduced, and if it is more than 0.77 mm, it is difficult to manufacture the decorative sheet itself and adhesion and post-processing are difficult.

[0066] 3. Metallic texture decorative sheet

[0067] In a metal textured decorative sheet according to one embodiment of the present invention, it is preferable that the first master batch of the first skin layer (110) and the second skin layer (120) and the second master batch of the substrate layer (130) have a color tone deviation (ΔE) calculated from Equation 1 of 1.0 or less.

[0068] (Formula 1)

[0069] ΔE* ab= [(ΔL*) 2 + (Δa*) 2 + (Δb*) 2 ] 1 / 2

[0070] In Equation 1, L* represents the lightness index, and a* and b* represent the chromaticity indices.

[0071] When the color difference ΔE between the first master batch and the second master batch exceeds 1.0, a color difference occurs in the edge and center portions of the decorative sheet where the thickness ratio of the first skin layer (110) and the second skin layer (120) is high due to insufficient hiding power.

[0072] In the present invention, the color tone deviation (ΔE) between the first master batch of the first skin layer (110) and the second skin layer (120) and the second master batch of the substrate layer (130) can be achieved to be 1.0 or less, thereby suppressing the color tone deviation between the widths within the decorative sheet. At this time, in the present invention, since the hiding power by the master batch is already secured within the content range of the first master batch and the second master batch described above, even if there is a difference in the content of the first master batch and the second master batch, the color tone is not substantially affected.

[0073] As an example, it is preferable that the color tone deviation (ΔE) of the central portion and the edge portion of the metal textured decorative sheet according to one embodiment of the present invention is less than 1.0 as calculated from the above formula 1. Generally, in order to impart the effect of having a metal texture to the decorative sheet, a master batch with metal particles added thereto is used in the skin layer located on the surface, and a dye / pigment of a different color is injected into the base layer to implement decorative sheet products of various colors. However, in this case, the color tone deviation (ΔE) of the central portion and the edge portion is 1.0 or more in the color tone data. In order to solve this problem, in the present invention, a second master batch (non-metal master batch) having the same color tone data as the first master batch (metal master batch) used in the first skin layer (110) and the second skin layer (120) is used in the base layer (130), thereby maintaining the color tone deviation (ΔE) of the central portion and the edge portion of the decorative sheet to 1.0 or less.

[0074] As an example, it is preferable that the thickness ratio of the first skin layer (110) and the second skin layer (120) and the substrate layer (130) is 1:5 to 1:77. If the thickness ratio of the first skin layer (110) and the second skin layer (120) and the substrate layer (130) is less than 1:5 and the thickness ratio of the first skin layer (110) and the second skin layer (120)) is thicker than the standard, there is a problem of an increase in manufacturing cost due to an increase in the content of expensive PETG and metal particles, and if the thickness ratio of the first skin layer (110) and the second skin layer (120)) is more than 1:77 and the thickness ratio of the first skin layer (110) and the second skin layer (120)) is thinner than the standard, there is a problem of an insufficient PETG layer, which causes problems in post-processing such as coating and bonding.

[0075] According to one embodiment of the present invention, a metal textured decorative sheet uses a first masterbatch (metal masterbatch) containing metal particles in the first skin layer (110) and the second skin layer (120) as described above to impart a metal textured effect, and uses a second masterbatch (non-metal masterbatch) having the same color tone data as the first masterbatch in the substrate layer (130) to impart hiding power (shielding effect). Accordingly, it is preferable that the metal textured decorative sheet have a total light transmittance of 5.0 or less. If the total light transmittance of the metal textured decorative sheet exceeds 5.0, there is a problem of color deviation due to a rear substrate due to insufficient hiding power.

[0076] Figure 2 is a cross-sectional view of a metal textured decorative sheet according to another embodiment of the present invention.

[0077] Referring to FIGS. 1 and 2, a metal textured decorative sheet according to another embodiment of the present invention may include a first skin layer (110), a base layer (130), and a second skin layer (120) sequentially laminated, and may further include a UV hard coating layer (140) formed on the surface of at least one of the first skin layer (110) and the second skin layer (120). In FIG. 2, the first skin layer (110), the second skin layer (120), and the base layer (130) have the same configuration as in FIG. 1, and redundant descriptions are omitted.

[0078] The UV hard coating layer (140) is formed by applying and curing a UV curable composition containing a urethane acrylate oligomer and an acrylate monomer onto the first skin layer (110) or the second skin layer (120). In the embodiment of FIG. 2, the UV hard coating layer (140) is formed only on the surface of the first skin layer (110), but this is only one example, and the UV hard coating layer (140) may be positioned on the surface of not only the first skin layer (110) but also the second skin layer (120), and may be positioned on the surfaces of both the first skin layer (110) and the second skin layer (120).

[0079] As an example, the acrylate monomer of the UV-curable composition is a reactive monomer, such as 1,3-butanediol di(meth)acrylate, 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, ethylene glycol di(meth)acrylate, bisphenol A-ethylene glycol diacrylate, diethylene glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, dipropylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, dicyclopentanyl di(meth)acrylate, caprolactone-modified dicyclopentenyl di(meth)acrylate, pentaerythritol tri(meth)acrylate, propylene oxide-modified trimethylolpropane. It may include at least one monomer selected from tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, propionic acid-modified dipentaerythritol penta(meth)acrylate, and caprolactone-modified dipentaerythritol hexa(meth)acrylate.

[0080] In addition, the UV curable composition forming the UV hard coating layer (140) may include one or more additives such as a UV absorber, a lubricant, a leveling agent, an antifoaming agent, a polymerization accelerator, an antioxidant, a flame retardant, an infrared absorber, a surfactant, and a surface modifier, within a range that does not impair the purpose of the present invention.

[0081] As an example, it is preferable that the UV hard coating layer (140) have at least one form selected from a matte pattern, an anti-fingerprint pattern, a general matte pattern, and a glossy pattern.

[0082] Figure 3 is a flow chart showing a method for manufacturing a metal textured decorative sheet according to one embodiment of the present invention.

[0083] Referring to FIG. 3, a method for manufacturing a decorative sheet with a metallic texture according to an embodiment of the present invention comprises: a first step (S101) of manufacturing a first masterbatch containing polyethylene terephthalate glycol, metal particles, and a pigment material; a second step (S102) of manufacturing a second masterbatch containing polyethylene terephthalate and a non-metallic pigment; a third step (S103) of manufacturing a raw material for a skin layer by mixing polyethylene terephthalate glycol and the first masterbatch; a fourth step (S104) of manufacturing a raw material for a base layer by mixing polyethylene terephthalate and the second masterbatch; a fifth step (S105) of melting the raw material for the skin layer in a high-temperature extrusion cylinder and feeding it into a sub-extruder and melting the raw material for the base layer and feeding it into a main extruder to extrude them respectively; a sixth step (S106) of co-extruding the raw material for the skin layer and the raw material for the base layer extruded in a T-Die having a multilayer structure to manufacture a decorative sheet with a laminated structure of a first skin layer / base layer / second skin layer; and a sixth step (S107) of applying a decorative film to a cooling roll. It may include a seventh step (S107) of cooling by passing the sheet through it.

[0084] In one embodiment, the method may further include an eighth step (S108) of applying a UV curable composition onto the first skin layer or the second skin layer to form a UV hard coating layer.

[0085] In one embodiment, it is preferable to adjust the non-metallic pigment content of the second master batch so that the color difference (ΔE) between the first master batch and the second master batch becomes 1.0 or less in the second step (S102). At this time, the method for making the color difference (ΔE) between the first master batch and the second master batch become 1.0 or less may be any of various methods available in the relevant technical field without limitation, and as an example, the method may be adjusted through the material types, color difference values, and contents of the pigment material of the first master batch and the non-metallic pigment of the second master batch.

[0086] As an example, in step 5 (S105), extrusion can be performed at a temperature of 270°C.

[0087] As an example, in step 8 (S108), it is preferable that the UV-curable composition include a urethane acrylate-based oligomer and an acrylate-based monomer.

[0088] As an example, in step 6 (S106), the UV curable composition is irradiated at a dose of 200 mj / cm 2 It is desirable to cure with UV.

[0089] Hereinafter, the composition and resulting effects of the present invention will be described in more detail through examples and comparative examples. However, these examples are intended to more specifically illustrate the present invention, and the scope of the present invention is not limited to these examples.

[0090] [Example]

[0091] [Example 1]

[0092] Manufacturing Example 1: Manufacturing of metal masterbatch (first masterbatch)

[0093] A metal masterbatch was prepared by composing metal particles (aluminum (Al) powder), dye (carbon black, CAS No. 1333-86-04), and polyethylene terephthalate glycol resin (K2012, SK Chemicals) in the contents shown in Table 1.

[0094] Manufacturing Example 2: Manufacturing of a non-metallic masterbatch (second masterbatch)

[0095] A non-metallic masterbatch was prepared by composing polyethylene terephthalate (BCN80, Lotte Chemical), dye (carbon black, CAS No. 1333-86-04), and pigment (titanium dioxide R-104, Chemours) in the contents shown in Table 1.

[0096] Manufacturing Example 3: Manufacturing of decorative sheets

[0097] The metal masterbatch manufactured in Manufacturing Example 1 and the polyethylene terephthalate glycol virgin raw material (K2012, SK Chemicals) are mixed in the contents shown in Table 1 to produce a skin layer raw material, which is melted and fed into a sub-extruder.

[0098] In addition, the base layer raw material manufactured by mixing the non-metal masterbatch manufactured in Manufacturing Example 2 and polyethylene terephthalate virgin raw material (BCN80, Lotte Chemical) in the contents shown in Table 1 is melted and fed into the main extruder.

[0099] At an extrusion cylinder temperature of 270℃, the skin layer raw material fed into the sub-extruder and the substrate layer raw material fed into the main extruder were each extruded, and then the two extruded components were connected to different paths of a multi-layered T-Die to manufacture a layered sheet structure, and then passed through a cooling roll to cool and then wound to manufacture a decorative sheet having a three-layer structure of a first skin layer / substrate layer / second skin layer. At this time, the thicknesses of the first skin layer and the second skin layer were 0.04 mm, and the thickness of the substrate layer was 0.2 mm.

[0100] [Examples 2 and 3]

[0101] A decorative sheet was manufactured in the same manner as in Example 1, except that the contents of the first skin layer, the second skin layer, and the substrate layer were configured as shown in Table 1.

[0102] [Comparative example]

[0103] [Comparative Example 1]

[0104] In Manufacturing Example 2, a pigment (Pigment Red, CAS No. 71902-17-5) was used in the metal masterbatch, and polyethylene terephthalate (BCN80, Lotte Chemical), a dye (carbon black, CAS No. 1333-86-04), and a pigment (titanium dioxide R-104, Chemours) were used in the non-metal masterbatch, and the contents of the first masterbatch and the second masterbatch were configured as shown in Table 1, but a decorative sheet was manufactured in the same manner as in Example 1.

[0105] [Comparative Examples 2 and 3]

[0106] A decorative sheet was manufactured in the same manner as in Comparative Example 1, except that the contents of the first skin layer, the second skin layer, and the substrate layer were configured as shown in Table 1.

[0107] First skin layer / Second skin layerBase layerMetal masterbatchPETGvirginnonmetallic masterbatchPETvirginmetallic particleDye pigmentPETGPETdye pigmentExample 1810913009145809.1Example 2101.25088.759005022281900Example 360.75093.25233.3952.22.8233.3Comparative example 1802.090300500.549.5809.1Comparative example 21102.7586.25220480.5251.48220Comparative example 3501.2593.75910960.043.962000

[0108] In Table 1, the unit of each component is g.

[0109] The physical properties of the decorative sheets having a metal texture according to Examples 1 to 3 and Comparative Examples 1 to 3 were measured through the following experimental examples, and the results are shown in Table 2 below.

[0110] [Experimental Example]

[0111] (1) Masterbatch color difference analysis

[0112] In the examples and comparative examples, the metal masterbatch of Manufacturing Example 1 and the non-metal masterbatch of Manufacturing Example 2 were mixed with PET to make 8 wt% each, and then melted and extruded to separately manufacture 1 mm thick metal masterbatch injection specimens and non-metal masterbatch injection specimens, and then irradiated with a D65 light source according to the ASTM E1164 standard and analyzed for color tone data (color difference chart) using a spectrophotometer (CM-2500d). Then, the color tone difference (ΔE) of the metal masterbatch and the non-metal masterbatch was calculated from the color tone data.

[0113] In Equation 1, which calculates the color difference (ΔE), L* indicates that the larger the number, the brighter the contrast, a* indicates that the larger the number, the redder the color, and the smaller the number, the greener the color, and b* indicates that the larger the number, the yellower the color, and the smaller the number, the bluer the color.

[0114] (2) Color difference analysis

[0115] In the decorative sheets according to the examples and comparative examples, the color tone data (color difference chart) was analyzed for each of the central and edge portions of the sheet using the same method as in Experimental Example 1. Then, the color tone deviation (ΔE) between the central and edge portions was calculated from the color tone data.

[0116] Target L*a*b*ΔE Example 1 Metal masterbatch 51.35 1.04 1.19 0.73 Non-metal masterbatch 51.8 11.10 1.76 Center 50.29 1.13 1.56 0.36 Edge 50.64 1.14 1.66 Example 2 Metal masterbatch 51.21 0.99 1.08 0.76 Non-metal masterbatch 51.68 1.05 1.68 Center 50.10 1.00 1.43 0.24 Edge 50.24 1.04 1.62 Example 3 Metal masterbatch 51.40 1.10 1.38 0.19 Non-metal Masterbatch 51.58 1.08 1.42 Central 50.08 1.05 1.36 0.52 Edge 50.49 1.04 1.68 Comparative Example 1 Metal Masterbatch 55.95 20.17 10.95 47.29 Non-metal Masterbatch 97.22-0.74 1.15 Central 65.52 26.03 15.46 2.16 Edge 67.65 26.31 15.66 Comparative Example 2 Metal Masterbatch 56.05 20.48 9.98 47.00 Non-metal Masterbatch 97.10-0.68 1.30 Central 64.67 24.85 14.96 2.27 Edge 66.91 25.24 15.05 Comparative Example 3 Metal Masterbatch 56.01 20.37 10.48 46.56 Non-metallic masterbatch 96.48-0.7 11.22 Central 62.41 23.95 10.41 2.51 Edge 64.85 23.43 10.71

[0117] As described in Table 2, Examples 1 to 3, which all satisfy the configuration of the present invention, have a color difference (ΔE) of 1.0 or less between the metal masterbatch and the non-metal masterbatch, and a color difference (ΔE) of less than 1.0 between the center and edge of the decorative sheet, so it can be seen that no color difference occurs across the width of the decorative sheet.

[0118] On the other hand, Comparative Examples 1 to 3, which do not satisfy the configuration of the present invention, do not satisfy the condition that the color difference (ΔE) between the masterbatch and the non-metallic masterbatch is 1.0 or less, and thus the color difference (ΔE) between the center and the edge of the deco sheet has a value of 1.0 or more, which indicates that a color difference occurs across the width of the deco sheet. In particular, when Example 1 and Comparative Example 1 are compared, in the case of Example 1, the color difference (ΔE) between the center and the edge of the deco sheet is 0.36, which indicates that the color difference across the width is very small, whereas in the case of Comparative Example 1, the color difference between the metal masterbatch and the non-metallic masterbatch is significantly caused by the pigment substance used in the metal masterbatch (first masterbatch), and thus the color difference (ΔE) between the center and the edge of the deco sheet is 2.16, which indicates that a large color difference occurs across the width.

[0119] Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention.

Claims

1. The first skin layer, the substrate layer, and the second skin layer are sequentially laminated. The first skin layer and the second skin layer are formed from a first master batch containing polyethylene terephthalate glycol, metal particles and a pigment material and polyethylene terephthalate glycol, The substrate layer is formed from a second masterbatch of amorphous polyethylene terephthalate and a non-metal, The first master batch and the second master batch are decorative sheets with a metallic texture, having a color difference (ΔE) of 1.0 or less as calculated from Equation 1: (Formula 1) ΔE* ab = [(ΔL*) 2 + (Δa*) 2 + (Δb*) 2 ] 1 / 2 Here, L* is the lightness index, and a* and b* are the chromaticity indices.

2. In paragraph 1, A metal textured decorative sheet comprising a first skin layer and a second skin layer, wherein the first skin layer comprises 70 to 90 wt% of polyethylene terephthalate glycol and 10 to 30 wt% of a first masterbatch.

3. In paragraph 2, A first masterbatch is a decorative sheet with a metallic texture, comprising 85 to 93.25 wt% of polyethylene terephthalate glycol, 6 to 10 wt% of metal particles, and 0.75 to 5 wt% of a pigment.

4. In paragraph 1, A decorative sheet having a metallic texture, wherein the metal particles include at least one selected from chromium (Cr), nickel (Ni) and aluminum (Al).

5. In paragraph 1, A decorative sheet with a metallic texture, wherein the coloring material comprises at least one selected from among dyes and pigments.

6. In paragraph 5, A decorative sheet with a metallic texture, wherein the pigment comprises at least one selected from titanium dioxide and carbon black.

7. In paragraph 1, A decorative sheet with a metallic texture, wherein the base layer comprises 70 to 95 wt% of amorphous polyethylene terephthalate and 5 to 30 wt% of a second masterbatch.

8. In paragraph 7, A second master batch is a decorative sheet with a metallic texture, comprising 50 to 95 wt% of polyethylene terephthalate and 5 to 50 wt% of a non-metallic pigment.

9. In paragraph 1, A metal textured decorative sheet is a metal textured decorative sheet in which the color difference (ΔE) between the center and the edge calculated from Equation 1 is less than 1.

0.

10. In paragraph 1, A metal textured decorative sheet is a metal textured decorative sheet with a light transmittance of 5.0 or less.

11. In paragraph 1, The thickness of the first skin layer and the second skin layer is 0.01 to 0.04 mm, A decorative sheet with a metallic texture, the thickness of the base layer being 0.17 to 0.77 mm.

12. In paragraph 1, A decorative sheet with a metallic texture, with a thickness ratio of the first skin layer, the second skin layer, and the substrate layer of 1:5 to 1:

77.

13. In paragraph 1, A UV hard coating layer in which a UV curable composition containing a urethane acrylate oligomer and an acrylate monomer is applied and cured on a first skin layer or a second skin layer; A decorative sheet with a metallic texture, including more.

14. In paragraph 13, A metal texture deco sheet having a UV hard coating layer having at least one form selected from a matte pattern, an anti-fingerprint pattern, a general matte pattern, and a glossy pattern.

15. A first step of manufacturing a first masterbatch comprising polyethylene terephthalate glycol, metal particles and a pigment substance; A second step of manufacturing a second masterbatch comprising polyethylene terephthalate and a non-metallic pigment; Step 3: manufacturing raw materials for the skin layer by mixing polyethylene terephthalate glycol and the first masterbatch; Step 4: manufacturing raw materials for the substrate layer by mixing polyethylene terephthalate and the second master batch; Step 5: Melting the raw material of the skin layer in a high-temperature extrusion cylinder and feeding it into the sub-extruder, and melting the raw material of the base layer and feeding it into the main extruder to extrude them respectively; A sixth step of manufacturing a decorative sheet with a laminated structure of a first skin layer / substrate layer / second skin layer by co-extruding the skin layer raw material and the base layer raw material extruded from a T-Die having a multi-layer structure; and Step 7: Cooling by passing the deco sheet through a cooling roll; A method for manufacturing a decorative sheet having a metal texture, including:

16. In paragraph 15, A method for manufacturing a decorative sheet with a metallic texture, wherein the non-metallic pigment content of the second master batch is adjusted so that the color difference (ΔE) between the first master batch and the second master batch is 1.0 or less in the second step.

17. In paragraph 15, After applying a UV curable composition containing a urethane acrylate oligomer and an acrylate monomer on the first skin layer or the second skin layer, the irradiation dose is 200 mj / cm 2 Step 8: Curing with UV to form a UV hard coating layer; A method for manufacturing a decorative sheet with a metal texture, further comprising:

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