KR102706345B1 - interior sheet - Google Patents

Abstract

The disclosed subject matter relates to an interior sheet having excellent scratch resistance, weather resistance, and contamination resistance, and having a matte emboss effect, so that it can be manufactured without a separate coating process.
The disclosed subject matter provides an interior sheet, as one embodiment, comprising a skin layer comprising a matte impact-resistant PMMA resin; and a substrate layer comprising at least one resin selected from the group consisting of PC resin, ABS resin, and ASA resin.

Description

interior sheet {interior sheet}

The disclosed content relates to interior seats.

Unless otherwise indicated herein, the matters described in this identifier are not prior art to the claims of this application, and their description in this identifier is not an admission that they are prior art.

Generally, interior (deco) sheets are non-adhesive sheets made of polyvinyl chloride (PVC) material, and are widely used not only for everyday household use but also for surfaces of office furniture, residential furniture, and kitchen furniture, by expressing natural textures with various printed roll patterns and embossed roll patterns. These interior sheets have been used for furniture interior and exterior materials, office furniture, building materials such as doors, kitchen furniture, various audio cases, and other interior decorations.

Polyvinyl chloride (PVC), which has been used as a material for interior seats, has excellent physical properties and moldability, but it requires the use of chemical products that may cause environmental problems, and polyolefin resin, which is emerging as an alternative material, has problems such as difficulty in calendar molding and poor appearance quality. Accordingly, polymethyl methacrylate (PMMA) material began to be used as a material for decorative seats, but it had the disadvantage of poor physical properties such as impact resistance.

In addition, interior sheets are surface treated to protect their surface and provide aesthetics. The surface treatment of the sheet is carried out in various ways depending on the purpose, and in some cases, a high-gloss surface treatment is applied, while in other cases, a matte surface treatment is applied.

Such surface treatment can be applied by using a coating method, or by applying a transfer method that roughens the surface by using an embossing roll or a transfer film with a large surface roughness.

The direct coating method that uses a matting agent to control gloss has the problem of increased usage due to reduced gloss, and the material properties of the matting agent make it easy to absorb contaminants, and the more usage, the worse the appearance quality. In addition, the transfer method has limitations in implementing a matte design with a gloss of 5 or less, so there is a disadvantage in that the product line is not diverse except for semi-gloss products with a gloss of 10 to 20.

Therefore, research is needed on how to achieve both excellent matte effects and contamination resistance.

Patent Document 1: Republic of Korea Registered Patent No. 10-0256913 Patent Document 2: Republic of Korea Registered Patent No. 10-0875272

The disclosed invention seeks to provide an interior sheet having excellent scratch resistance, weather resistance, and contamination resistance, and having a matte emboss effect, so that it can be manufactured without a separate coating process.

It is also clear that the technical challenges are not limited to those described above, and that other technical challenges may be derived from the following description.

The disclosed content provides an interior sheet, as one embodiment, comprising: a skin layer comprising a matte impact-resistant PMMA resin; and a substrate layer laminated on a lower side of the skin layer and comprising at least one resin selected from the group consisting of PC resin, ABS resin, and ASA resin.

Also, another embodiment of the present invention provides an interior sheet including a skin layer comprising a matte impact-resistant PMMA resin; a first substrate layer laminated on a lower side of the skin layer and comprising an impact-resistant PMMA resin; and a second substrate layer laminated on a lower side of the first substrate layer and comprising an ABS resin or an ASA resin. According to the features of the disclosed content, the interior sheet is characterized in that it further includes a third substrate layer formed between the first substrate layer and the second substrate layer and comprising an impact-resistant PMMA resin.

According to an interior sheet according to one embodiment of the disclosed content,

It has excellent scratch resistance, weather resistance, and contamination resistance, and has a matte embossing effect, so it has the advantage of being able to manufacture sheets without a separate coating process.

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 of the claims.

FIG. 1 illustrates a cross-sectional view of one embodiment of an interior sheet according to the present specification.
FIG. 2 illustrates a cross-sectional view according to another embodiment of an interior sheet according to the present specification.
FIG. 3 illustrates a cross-sectional view according to another embodiment of an interior sheet according to the present specification.

Hereinafter, the configuration and operation effects of a preferred embodiment of the disclosed content will be examined with reference to the attached drawings. For reference, in the drawings below, each component is omitted or schematically illustrated for convenience and clarity, and the size of each component does not reflect the actual size. In addition, the same reference numerals refer to the same components throughout the specification, and drawing numerals for the same configuration in individual drawings are omitted.

One embodiment of the interior sheet disclosed in the present specification is characterized by including a skin layer (10) including a matte impact-resistant PMMA resin, as shown in the cross-sectional view of FIG. 1; and a substrate layer (20) laminated on the lower side of the skin layer and including at least one resin selected from the group consisting of PC resin, ABS resin, and ASA resin.

The total thickness of the above interior sheet is preferably 0.2 to 2 mm, but is not limited thereto.

The above-mentioned skin layer (10), as shown in FIG. 1, is a layer located on the outermost upper layer of the interior sheet, and is characterized by including a matte impact-resistant PMMA resin, thereby providing excellent scratch resistance, weather resistance, and contamination resistance, and having a matte embossing effect, enabling the manufacture of an interior sheet that does not require a separate coating process.

The above matte impact-resistant PMMA resin is a resin characterized by including an impact-resistant PMMA resin and a matting agent.

With respect to the total thickness of the interior sheet, the thickness of the skin layer (10) is preferably 1.5 to 10%, and the thickness of the substrate layer (20) is preferably 90 to 98.5%, but is not limited thereto. If the thickness of the skin layer is less than 1.5% of the total thickness, the surface strength is weak and it may be difficult to implement the embossing effect and matte feel, and if it exceeds 10%, it becomes thicker than necessary, which limits application, and may cause problems such as reduced flexibility and increased manufacturing cost.

The above-mentioned impact-resistant PMMA resin is a general PMMA resin containing an impact modifier, and the impact modifier is characterized by including an acrylic core; a rubber core surrounding the acrylic core; a methacrylic shell surrounding the rubber core; and a lubricating shell surrounding the methacrylic shell.

The above acrylic core is the most central material of the impact modifier and includes an alkyl methacrylate monomer, and the alkyl methacrylate monomer may be at least one selected from the group consisting of methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, n-butyl acrylate, hexyl acrylate, octyl acrylate, and 2-ethylhexyl acrylate, but is not limited thereto.

The above rubber core is added to secure impact strength, and in addition to the alkyl methacrylate monomer included in the acrylic core, it may further include at least one selected from the group consisting of styrene, α-methylstyrene, p-methylstyrene, vinyl toluene, alkyl styrene substituted with a C1-3 alkyl group, and styrene substituted with a halogen.

The above methacrylic shell includes an alkyl methacrylate monomer, and the alkyl methacrylate monomer may be at least one selected from the group consisting of methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, n-butyl acrylate, hexyl acrylate, octyl acrylate, and 2-ethylhexyl acrylate, but is not limited thereto.

The above lubricating shell serves to increase the compatibility of the impact modifier and the resin so as not to impair the transparency of the impact-resistant PMMA resin. The above lubricating shell may contain, without limitation, an emulsifier that can be used in the present technical field. The above emulsifier is not particularly limited, but may be a phosphate salt, a sulfonate salt, or a sulfate salt, and the phosphate salt may be sodium polyoxyethylene alkylphosphate, sodium polyoxyethylene alkylarylphosphate, or the like. The sulfonate salt may be sodium alkylbenzene sulfonate, sodium alkylarylnaphthalene sulfonate, sodium dialkylsulfosuccinate, or the like, and the sulfate salt may be sodium alkylsulfate, sodium polyoxyethylene alkyl sulfate, or the like.

The above-mentioned impact-resistant PMMA resin is preferably a resin having a melting index of 2.0 to 2.2 g/10 min at 230°C and 3.8 kg, a Charpy impact strength of 2.5 kJ/m ² or more, and a weight average molecular weight of 100,000 to 120,000 g/mol, but is not limited thereto.

The above matting agent is a substance that provides roughness to the surface of the epidermal layer to implement a matting (matte, emboss) effect.

As the above matting agent, at least one selected from the group consisting of an organic matting agent, an inorganic matting agent, and an organic-inorganic composite matting agent can be used, and it is preferable to use a matting agent in the form of beads.

The refractive index of the above bead-shaped matting agent is preferably 1.43 to 1.49, but is not limited thereto.

The average particle size of the above matting agent is preferably 0.5 ㎛ to 15 ㎛, and more preferably 3 ㎛ to 10 ㎛. If the average particle size is less than 3 ㎛, there is a problem that a large amount of matting agent must be used to achieve a matting effect, and if the average particle size is 10 ㎛ or more, there may be a problem that the surface feel is not good.

The organic matting agent may be at least one selected from the group consisting of acrylic, epoxy, and urethane polymers, but is not limited thereto. In terms of increasing the anti-contamination effect of interior sheets, it may be preferable to use an organic matting agent with a modified surface.

As the above inorganic matting agent, at least one selected from the group consisting of silica (SiO2), silicate, alumina (Al2O3), zirconia (ZrO2), zeolite, and titanium oxide may be used, but is not limited thereto. In terms of increasing the anti-contamination effect of the interior sheet, it may be preferable to use an inorganic matting agent with a modified surface.

The above matting agent may be included in an amount of 1 to 15 wt% of the weight of the matte impact-resistant PMMA resin, and is preferably included in an amount of 5 to 10 wt%. By including the matting agent in an amount within the above range, the contamination resistance and matting effect of the decorative sheet using the same can be effectively improved.

The above-mentioned epidermal layer (10) includes the matte impact-resistant PMMA resin as described in detail above and has the above-mentioned thickness range, so that the surface roughness (Ra value) is characterized by being 0.6 to 2.0 ㎛, and preferably 1 to 1.5 ㎛.

In addition, it is preferable that the transmittance of the above epidermal layer be 85 to 95%, and the haze be 80 to 90%.

When the above desirable ranges of surface roughness, transmittance and haze are satisfied, the epidermal layer can exhibit effective matte characteristics.

Referring to FIG. 1, the above-mentioned substrate layer (20) is a layer that serves as the substrate of the interior sheet, is laminated on the lower side of the above-mentioned skin layer (10), and is a layer characterized by including at least one resin selected from the group consisting of PC resin, ABS resin, and ASA resin.

The above PC (Poly-carbonate) resin is transparent and has excellent optical properties, excellent mechanical strength such as impact strength, and excellent weather resistance. It also has the characteristics of being resistant to oil, weak acid, strong acid, alkali, benzene, and alcohol.

The above PC resin preferably has a melting index of 5 to 10 g/10 min at 260°C and 1.2 kg and a weight average molecular weight of 20,000 to 30,000 g/mol, but is not limited thereto.

The above ABS (Acrylonitrile-butadiene-styrene) resin has excellent impact resistance, chemical resistance, and weather resistance, and is a resin with excellent formability such as injection molding and extrusion molding, and secondary processability such as coloring.

The above ABS resin is a copolymer in which styrene monomer and butadiene rubber are copolymerized with an acrylonitrile monomer, and the ratio of each component can be adjusted to obtain desired properties. For example, it is preferable to use an ABS resin manufactured by copolymerizing 10 to 30 parts by weight of butadiene rubber and 40 to 60 parts by weight of styrene monomer with respect to 20 parts by weight of acrylonitrile monomer, but the present invention is not limited thereto.

The above ABS resin preferably has a melting index of 6 to 8 g/10 min at 220°C and 10 kg, a flexural modulus of 2.4 to 2.6 Gpa, an Izod impact strength of 21 to 30 kJ/m ² , and a weight average molecular weight of 100,000 to 200,000 g/mol, but is not limited thereto.

The above ASA (Acrylate-Styrene-Acrylonitrile) resin is a resin that exhibits properties at the level of general ABS, but also has excellent impact resistance and high weather resistance, so it can maintain stable properties over the long term, and is a resin that is widely used as an exterior cladding material.

The above ASA resin preferably has a melting index of 220°C, 5 to 9 g/10 min at 10 kg, and an Izod impact strength of 6.0 to 25.0 kJ/ ^m2 , but is not limited thereto.

In addition, from an economical perspective, instead of the PC resin, ABS resin and ASA resin, their regenerated resins can be used, which has the advantage of reducing the cost.

The above-mentioned epidermal layer (10) may further include at least one additive selected from the group consisting of an anti-oxidant, a flame retardant, a stabilizer, an ultraviolet absorber, an antistatic agent, a flame retardant, a plasticizer, and a foaming agent.

In addition, the above-mentioned base layer (20) may further include at least one additive selected from the group consisting of pigments, pearl particles, activators, antioxidants, flame retardants, stabilizers, ultraviolet absorbers, antistatic agents, flame retardants, plasticizers, and foaming agents. The amount of the above-mentioned additives may be appropriately adjusted depending on the purpose and function.

The above pigment is used as a coloring agent, and its type and content can be appropriately adjusted depending on the color required for the purpose for which the decorative multi-sheet is used.

Any type of pigment, organic or inorganic, can be used, but it is preferable to use an inorganic pigment in terms of hiding power between pigment resins and price. Inorganic pigments have coloring components made of inorganic substances, and have greater hiding power than organic pigments, and are superior in heat resistance and light resistance.

The types of organic pigments that can be used include, but are not limited to, azo, phthalocyanine, dye, condensed polycyclic, quinacridone, nitro and nitroso, carbon black, lamp black, acetylene black, and channel black.

The types of the above inorganic pigments include metals, metal oxides and sulfides, and specifically, at least one selected from the group consisting of cobalt, iron, chromium, copper, zinc, lead, titanium, vanadium, manganese, nickel, calcium carbonate (CaCO3), talc, barium sulfate (BaSO4), silicon oxide (SiO2), aluminum hydroxide (Al(OH)3), kaolin, clay, titanium dioxide (TiO2), carbon black, iron oxide, zinc oxide (ZnO), and white lead may be used, but the present invention is not limited thereto.

As magenta pigments, for example, C. I. Pigment Red 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 21, 22, 23, 30, 31, 32, 37, 38, 40, 41, 42, 48(Ca), 48(Mn), 57(Ca), 57:1, 88, 112, 114, 122, 123, 144, 146, 149, 150, 166, 168, 170, 171, 175, 176, 178, 179, 184, 185, 187, 202, 209, 219, 245, C. I. Pigment Violet 19, 23, 32, 33, 36, 38, 43, 50, etc.

Examples of yellow pigments include C. I. Pigment Yellow 1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 14, 16, 17, 24, 34, 35, 37, 53, 55, 65, 73, 74, 75, 81, 83, 93, 94, 95, 97, 98, 99, 108, 109, 110, 114, 117, 120, 124, 128, 129, 133, 138, 139, 147, 151, 153, 154, 167, 172, 180, etc.

Examples of cyan pigments include C. I. Pigment Blue 1, 2, 3, 15, 15:1, 15:2, 15:3, 15:34, 15:4, 16, 18, 22, 25, 60, 65, 66, etc.

Other pigments other than magenta, yellow and cyan include, for example, C. I. Pigment Green 7, 10, C. I. Pigment Brown 3, 5, 25, 26, C. I. Pigment Orange 1, 2, 5, 7, 13, 14, 15, 16, 24, 34, 36, 38, 40, 43, 63.

For example, carbon black as a black pigment (Key=Black), MCF88, No. 2300, 2200B, 900, 33, 40, 45, 52, MA7, 8, 100, etc. (all product names, Mitsubishi Chemical Co.) Raven 5750, 5250, 5000, 3500, 1255, 700, etc. (all product names, Columbia Carbon Co.) Rega1 400 R, 330 R, 660 R, Mogul L, Monarch 700, 800, 880, 900, 1000, 1100, 1300, 1400, etc. (all product names, Cabot Co.) Color Black FW1, FW2, FW2V, FW18, FW200, S150, S160, S170, Printex 35, U, V, 140 U, Special Black There are 6, 5, 4A, 4th class (all product names, Degu Corporation), etc.

The above pigment may be used alone or mixed with other pigments. For example, the average particle size of the pigment may be in the range of 0.005 to 15 μm, preferably 0.05 to 5 μm. If the average particle size of the pigment is less than 0.005 μm, it may be difficult to disperse in the resin and may have poor fluidity, and if it exceeds 15 μm, it may be difficult to express the desired color.

The above pearl particles are intended to provide a reflective function for sunlight, lighting, etc., and an elegant and beautiful aesthetic function for the sheet layer, such as color. The above pearl particles may be made of metal particles such as aluminum particles or silver particles in a plate shape that are generally used to have a metallic feel or metallic effect, or pearl pigments and inorganic ingredients that have various colors and three-dimensional effects such as black, silver, white, gold, or blue.

In addition, the viscosity of the pearl particles is preferably in the range of 800 to 1200 cps. If the viscosity exceeds 1200 cps, it is difficult to control the thickness of the substrate layer and the reinforcing layer, and the probability of defects such as coating marks increasing, and if the viscosity is less than 800 cps, phenomena such as sedimentation of metal particles and reduction in transfer amount may occur.

The above pearl particles are preferably in the form of flakes with a size of 150 to 250 microns. If the particle size is small, the pearl feel is reduced, and if the particle size is large, the pearl feel is good, but there is a disadvantage in that workability is reduced, such as particle sedimentation.

The above-mentioned active agent is a substance used to improve fluidity when heat-molding a resin to facilitate processing, and at least one of metal stearate, ester, amide, and paraffin can be used, preferably metal stearate, but is not limited thereto. Commercially available active agents include Hi-Lube (Songwon Chemical), Mg-St (Songwon), Ca-St (Songwon), Zn-St (Songwon), AX-71 (ADEKA), Loxiol® P-861 (Emery), etc.

The above antioxidant is a substance added to prevent the resin from easily oxidizing by reacting with air and thus deteriorating its quality. At least one of phenol, amine, sulfur, phosphate, and phosphorus antioxidants can be selected and used. Among commercially available antioxidants, phenol-based antioxidants include Irganox 1076 (BASF), Irganox 1010 (BASF), AO-60/AO-60G (ADEKA), ETHANOX® 310 (ALBEMARLE), etc., and phosphate-based antioxidants include Irgafos 168 (BASF), ETHAPHOSTM 368 (ALBEMARLE), Hostanox® P-EPQ® FF (Clariant), etc.

The above antioxidant is divided into a primary antioxidant and a secondary antioxidant when compounded with the resin. It is preferable to use the phenol type as the primary antioxidant, and it is preferable to include 0.1 to 0.2 parts by weight based on 100 parts by weight of the resin. It is preferable to use the phosphate type as the secondary antioxidant, and it is preferable to include 0.1 to 0.2 parts by weight based on 100 parts by weight of the resin.

In addition, another embodiment of the decorative multi-sheet disclosed in the present specification is characterized by including a skin layer (10) including a matte impact-resistant PMMA resin, as shown in the cross-sectional views of FIGS. 2 and 3; a first substrate layer (21) laminated on a lower side of the skin layer and including an impact-resistant PMMA resin; and a second substrate layer (22) laminated on a lower side of the first substrate layer and including an ABS resin or an ASA resin.

At this time, with respect to the entire thickness of the interior sheet, the thickness of the skin layer (10) is preferably 1.5 to 10%, the thickness of the first substrate layer (21) is 80 to 90%, and the thickness of the second substrate layer (22) is 5 to 15%, but is not limited thereto. If the thickness of the skin layer (10) is less than 1.5% of the entire thickness, the surface strength is weak and it may be difficult to implement the embossing effect and matte feel, and if it exceeds 10%, it becomes thicker than necessary, which limits application, and problems such as reduced flexibility and increased manufacturing cost may occur.

In addition, a third substrate layer (23) formed between the first substrate layer and the second substrate layer and including an impact-resistant PMMA resin may be further included.

At this time, with respect to the entire thickness of the interior sheet, the thickness of the skin layer (10) is preferably 1.5 to 10%, the thickness of the first substrate layer (21) is 70 to 80%, the thickness of the second substrate layer (22) is 8 to 12%, and the thickness of the third substrate layer (23) is 8 to 12%, but is not limited thereto. If the thickness of the skin layer (10) is less than 1.5% of the entire thickness, the surface strength is weak and it may be difficult to implement the embossing effect and matte feel, and if it exceeds 10%, it becomes thicker than necessary, which limits application, and problems such as reduced flexibility and increased manufacturing cost may occur.

The total thickness of the above interior sheet is preferably 0.2 to 2 mm, but is not limited thereto.

The above epidermal layer (10) is characterized by including a matte impact-resistant PMMA resin, and is the same as described in detail above, so a description thereof is omitted below.

The above first substrate layer (21) is laminated on the lower side of the skin layer and effectively improves the durability, such as scratch resistance, of the interior sheet by including impact-resistant PMMA resin. The impact-resistant PMMA resin is the same as described in detail above.

The second substrate layer (22) is laminated on the lower side of the first substrate layer and is characterized by including ABS resin or ASA resin, and the ABS resin and ASA resin are the same as described in detail above.

The third substrate layer (23) is formed between the first substrate layer and the second substrate layer, and is characterized by including an impact-resistant PMMA resin. By further including the third substrate layer (23), the impact resistance of the interior sheet can be drastically improved.

The above-mentioned epidermal layer (10) may further include at least one additive selected from the group consisting of an anti-oxidant, a flame retardant, a stabilizer, an ultraviolet absorber, an antistatic agent, a flame retardant, a plasticizer, and a foaming agent.

The second substrate layer and the third substrate layer may further include at least one additive selected from the group consisting of pigments, pearl particles, activators, antioxidants, flame retardants, stabilizers, ultraviolet absorbers, antistatic agents, flame retardants, plasticizers, and foaming agents.

Since the above additives are the same as those described in detail above, they are omitted below, and the amount of the above additives can be appropriately adjusted depending on the purpose and function.

Below, the manufacturing method of the interior sheet disclosed in FIGS. 1 to 3 is described in more detail.

The interior sheet disclosed in this specification is characterized by being manufactured by a co-extrusion method using a T-die. When manufactured by a co-extrusion method, unlike a sheet that coats the surface layer, a separate coating for protecting the surface layer is not required, and the manufactured sheet has excellent light transmittance, scratch resistance, and weather resistance, and its characteristics are semi-permanent. In addition, when manufactured by a co-extrusion method, since a thermosetting coating or ultraviolet coating, etc. is not performed, there is no post-process, so it has good economy, workability, and productivity, and further has a cost-saving effect and can be manufactured so as to be easy to post-form.

Specifically, the above-mentioned epidermal layer (10), substrate layer (20), first substrate layer (21), second substrate layer (22) and third substrate layer (23) are manufactured by extruding using individual extruders, and at this time, the extrusion molding temperature of the extruder is preferably 240 to 280°C. Here, basically, the same number of individual extruders as the type of resin used in each layer are used.

In addition, each layer manufactured by extrusion as described above is laminated using a polishing roll, and it is preferable that the lamination temperature be 100 to 115°C.

The interior sheet disclosed in this specification can be used as furniture finishing material, interior/exterior materials of automobiles (roof boxes), exterior materials of home appliances (refrigerators, etc.), exterior materials of toys, or bathtubs, and is preferably used as furniture finishing material, but is not limited thereto.

The present invention may be better understood by the following examples, which are intended to illustrate the present invention and are not intended to limit or restrict the scope of the appended claims.

[Example 1]

In the main extruder, PC resin is extruded, and in the sub extruder, matte impact-resistant PMMA resin is extruded at an extruder molding temperature of 240℃, and co-extrusion is performed in a T-die, and the two are laminated on a polishing roll at 100℃ to manufacture an interior sheet with a total thickness of 0.5 mm, which includes a 0.05 mm thick skin layer containing matte impact-resistant PMMA resin and a 0.45 mm thick substrate layer containing PC resin.

[Example 2]

In the main extruder, impact-resistant PMMA resin is extruded, in the sub-1 extruder, matte impact-resistant PMMA resin, and in the sub-2 extruder, ABS resin are extruded at an extruder molding temperature of 240℃, molded by co-extrusion in a T-die, and laminated on a polishing roll at 100℃ to manufacture an interior sheet having a total thickness of 1 mm, including a 0.05 mm thick skin layer containing matte impact-resistant PMMA resin, a 0.85 mm thick first substrate layer containing impact-resistant PMMA resin, and a 0.1 mm thick second substrate layer containing ABS resin.

[Comparative Example 1]

A decorative multi-sheet is manufactured in the same manner as in Example 1, except that a general PMMA resin is applied to the sub-extruder and extruded.

[Comparative Example 2]

A decorative multi-sheet is manufactured in the same manner as in Example 1, except that a general impact-resistant PMMA resin is applied to the sub-extruder and extruded.

[Comparative Example 3]

A decorative multi-sheet is manufactured in the same manner as in Example 2, except that a general PMMA resin is applied to the sub-extruder and extruded.

[Comparative Example 4]

A decorative multi-sheet is manufactured in the same manner as in Example 2, except that a general impact-resistant PMMA resin is applied to the sub-extruder and extruded.

[Experimental Example 1] Surface hardness

Pencil hardness was measured and evaluated at a weight of 1 kgf according to the ASTM D3363 test standard. For exterior use, a grade of H or higher is required.

[Experimental Example 2] Weatherability

Using a Q-UV tester (QUV/se, Q-LAB), a UV lamp with a wavelength of 340 nm was used, the light intensity was set to 0.71 W/㎡, and 1 cycle (UV mode 4 hr, condensation 4 hr), and the test was conducted for up to 1000 hours in 200-hour increments. After the test, the yellowness index (YI) change (△YI) was measured according to the ASTM E313-73 standard, and the value was calculated.

[Experimental Example 3] Contamination Resistance

After applying a certain amount of tea (green tea), coffee, water-based magic, oil-based magic, etc. to the upper side of the extruded sheet, it was left at room temperature (23±2℃) for 24 hours, washed and dried, and the appearance was checked after 24 hours, and the appearance quality was marked as excellent, good, average, or poor.

The above physical properties are expressed as follows.

◎: Excellent / ○: Average / △: Poor

division Surface hardness (grade) Weather resistance My contamination resistance Example 1 3H ◎ ◎ Example 2 3H ◎ ◎ Comparative Example 1 H △ △ Comparative Example 2 2H ○ ○ Comparative Example 3 H △ △ Comparative Example 4 2H ○ ○

As can be seen in the table above, Examples 1 and 2 were found to be suitable for use as interior sheets because they all had excellent surface hardness, weather resistance, and contamination resistance.

On the other hand, Comparative Examples 1 and 3 did not include a matte impact-resistant PMMA resin in the epidermal layer, and thus showed significantly lower surface hardness, weather resistance, and contamination resistance than Examples 1 and 2, indicating that they are not suitable for use as exterior materials. In addition, Comparative Examples 2 and 4 showed properties close to those of Example 1, but fell short of Example 1 in surface hardness, weather resistance, and contamination resistance.

Although the preferred embodiments of the present invention have been described with reference to the attached drawings, the embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, and it should be understood that there may be various equivalents and modified examples that can replace them at the time of this application. Therefore, it should be understood that the embodiments described above are exemplary and not restrictive in all respects, and the scope of the present invention is indicated by the claims described below rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concepts should be interpreted as being included in the scope of the present invention.

10: Epidermis layer
20: Substrate layer
21: 1st layer
22: Second layer
23: Third layer

Claims (7)

It is an interior sheet with a thickness of 0.2 to 2.0 mm manufactured by coextrusion.
The above interior sheets are,
A skin layer containing a matte, impact-resistant PMMA resin;
It is laminated on the lower part of the above epidermal layer and includes a substrate layer containing ASA resin,
Regarding the overall thickness of the above interior sheet,
The thickness of the above epidermal layer is 1.5 to 10%, and the thickness of the above substrate layer is 90 to 98.5%.
The above matte impact resistant PMMA is,
Contains PMMA resin, impact modifier and matting agent,
The above shock absorber is,
It comprises an acrylic core, a rubber core surrounding the acrylic core, a methacrylic shell surrounding the rubber core, and a lubricating shell surrounding the methacrylic shell.
The above-mentioned quencher is,
An interior sheet in the form of a bead and made of at least one polymer selected from the group consisting of acrylic, epoxy, and urethane polymers.
delete It is an interior sheet with a thickness of 0.2 to 2.0 mm manufactured by coextrusion.
The above interior sheets are,
A skin layer containing a matte, impact-resistant PMMA resin;
A first substrate layer is laminated on the lower side of the above epidermal layer and includes an impact-resistant PMMA resin; and
A second substrate layer is laminated on the lower side of the first substrate layer and includes an ASA resin.
Regarding the overall thickness of the above interior sheet,
The thickness of the above epidermal layer is 1.5 to 10%, the thickness of the above first substrate layer is 80 to 90%, and the thickness of the above second substrate layer is 5 to 15%.
The above matte impact resistant PMMA is,
Contains PMMA resin, impact modifier and matting agent,
The above shock absorber is,
It comprises an acrylic core, a rubber core surrounding the acrylic core, a methacrylic shell surrounding the rubber core, and a lubricating shell surrounding the methacrylic shell.
The above-mentioned quencher is,
It is in the form of a bead and is at least one selected from the group consisting of acrylic, epoxy and urethane polymers.
Interior seats.
In the third paragraph,
An interior sheet characterized by further comprising a third substrate layer formed between the first substrate layer and the second substrate layer and including an impact-resistant PMMA resin.
delete In paragraph 4,
An interior sheet characterized in that, with respect to the entire thickness of the interior sheet, the thickness of the skin layer is 1.5 to 10%, the thickness of the first substrate layer is 70 to 80%, the thickness of the second substrate layer is 8 to 12%, and the thickness of the third substrate layer is 8 to 12%.
delete