KR20230152222A - interior sheet - Google Patents

Abstract

The disclosed content relates to an interior sheet that has excellent scratch resistance, weather resistance, and stain resistance, and has a matte emboss effect, so that it can be manufactured without a separate coating process.
The disclosed content includes an epidermal layer comprising a matte, impact-resistant PMMA resin; An interior sheet including a base layer containing at least one resin selected from the group consisting of PC resin, ABS resin, and ASA resin is presented as an example.

Description

interior sheet {interior sheet}

The disclosed content relates to interior seats.

Unless otherwise indicated herein, the matters described in this identification are not prior art to the claims of this application, and are not admitted to be prior art by being described in this identification.

In general, interior (deco) sheets are made of polyvinyl chloride (PVC), which expresses natural texture through various printing roll patterns and embossed roll patterns, and is widely used not only in everyday homes but also on the surfaces of office furniture, residential furniture, and kitchen furniture. It is a non-adhesive sheet that is being developed. These interior sheets have been used in 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 conventionally used as a material for interior seats, has excellent physical properties and moldability, but requires the use of chemical products that may cause environmental problems, and polyolefin resin, which is emerging as an alternative material, is used for calender molding. This problem was difficult and the appearance quality was poor. Accordingly, polymethyl methacrylate (PMMA) material began to be used as a material for decor sheets, but it had the disadvantage of weak physical properties such as impact resistance.

Additionally, interior sheets are subjected to surface treatment to protect the 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 used, and in other cases, a matte surface treatment is used.

This surface treatment can be done using a coating method or a transfer method that applies irregularities to the surface using an embossing roll or a transfer film with high surface roughness.

The direct coating method, which uses a matting agent to control gloss, has the problem of an increase in the amount used due to a decrease in gloss, and the material properties of the matting agent make it easy for contaminants to be absorbed, and the more the amount used, the lower the appearance quality. In addition, the transfer method has limitations in realizing a matte design with a gloss level of 5 or less, so there is a disadvantage in that the product line is not diverse other than semi-gloss products with a gloss level of 10 to 20.

Therefore, there is a need for research into something that can simultaneously achieve excellent matting effect and stain resistance.

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

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

Additionally, it is not limited to the technical challenges described above, and it is obvious that other technical challenges may be derived from the description below.

The disclosed content includes an epidermal layer comprising a matte, impact-resistant PMMA resin; And an interior sheet including a base layer laminated on the bottom of the skin layer and containing at least one resin selected from the group consisting of PC resin, ABS resin, and ASA resin is presented as an example.

Additionally, a skin layer containing a matte, impact-resistant PMMA resin; A first base layer laminated on the bottom of the skin layer and containing an impact-resistant PMMA resin; And an interior sheet including a second base layer laminated on the bottom of the first base layer and containing ABS resin or ASA resin is presented as another embodiment, and according to the characteristics of the disclosure, the first base material It is formed between the layer and the second base layer, and further includes a third base layer containing an impact-resistant PMMA resin.

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

It has excellent scratch resistance, weather resistance, and stain resistance, and has a matte emboss effect, so it has the advantage of making it possible 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.

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

Hereinafter, the configuration and operational effects of preferred embodiments 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 shown 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 reference numerals for the same components in individual drawings will be omitted.

One embodiment of the interior sheet disclosed herein includes, as shown in the cross-sectional view of FIG. 1, a skin layer 10 containing a matte impact-resistant PMMA resin; and a base layer 20 laminated on the bottom of the skin layer and comprising at least one resin selected from the group consisting of PC resin, ABS resin, and ASA resin.

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

Referring to FIG. 1, the skin layer 10 is a layer located on the outermost upper layer of the interior sheet, and is characterized by containing a matte impact-resistant PMMA resin, thereby providing excellent scratch resistance, weather resistance, and contamination resistance, It has a matte embossing effect, making it possible to manufacture interior sheets that do not require a separate coating process.

The matte impact-resistant PMMA resin is a resin characterized in that it contains 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 base layer 20 is preferably 90 to 98.5%, but are not limited thereto. If the thickness of the epidermal 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 a matte texture. If it exceeds 10%, it becomes thicker than necessary, limiting application, reducing flexibility, and increasing manufacturing costs. Problems may arise.

The impact-resistant PMMA resin is a general PMMA resin containing an impact modifier, and the impact modifier includes 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 acrylic core is the central material of the impact modifier and includes an alkyl methacrylate monomer, and the alkyl methacrylate monomer is methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, and n-butyl. It may be one or more selected from the group consisting of acrylate, hexyl acrylate, octyl acrylate, and 2-ethylhexyl acrylate, but is not limited thereto.

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

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

The lubricating shell serves to increase compatibility between the impact modifier and the resin to prevent transparency of the impact-resistant PMMA resin from being impaired. The lubricating shell may contain emulsifiers that can be used in the art without limitation. The 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 alkyl phosphate, sodium polyoxyethylene alkylaryl phosphate, etc. The sulfonate salt may be sodium alkylbenzene sulfonate, sodium alkylarylnaphthalene sulfonate, sodium dialkyl sulfosuccinate, etc., and the sulfate salt may be sodium alkyl sulfate, sodium polyoxyethylene alkyl sulfate, etc.

The impact-resistant PMMA resin is preferably a resin with a melt 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. It is not limited to this.

The matting agent is a substance that implements a matting (matte, embossing) effect by imparting roughness to the surface of the epidermal layer.

The matting agent may be any one or more selected from the group consisting of organic matting agents, inorganic matting agents, and organic-inorganic composite matting agents. It is preferable to use a matting agent in the form of beads.

The refractive index of the matting agent in the form of beads is preferably 1.43 to 1.49, but is not limited thereto.

The average particle diameter of the matting agent is preferably 0.5 ㎛ to 15 ㎛, more preferably 3 ㎛ to 10 ㎛. If the average particle diameter is less than 3 ㎛, there may be a problem that a large amount of matting agent must be used for the matting effect, and if the average particle diameter is 10 ㎛ or more, there may be a problem of poor surface feel.

The organic matting agent may be one or more selected from the group consisting of acrylic, epoxy, and urethane polymers, but is not limited thereto. In terms of increasing the stain resistance effect of interior sheets, it may be desirable to use an organic matting agent with a modified surface.

The inorganic matting agent may be one or more selected from the group consisting of silica (SiO2), silicate, alumina (Al2O3), zirconia (ZrO2), zeolite, and titanium oxide, but is not limited thereto. In terms of increasing the stain resistance effect of interior sheets, it may be desirable to use an inorganic matting agent with a modified surface.

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

As described in detail above, the skin layer 10 includes the matte impact-resistant PMMA resin and has the above thickness range, and has a surface roughness (Ra value) of 0.6 to 2.0 ㎛, , preferably 1 to 1.5 ㎛.

Additionally, the transmittance of the epidermal layer is preferably 85 to 95%, and the haze is preferably 80 to 90%.

When the desired range of surface roughness, transmittance, and haze is satisfied, the epidermal layer can exhibit effective matte characteristics.

Referring to FIG. 1, the base layer 20 is a base layer of the interior sheet, is laminated on the bottom of the skin layer 10, and is any one selected from the group consisting of PC resin, ABS resin, and ASA resin. This layer is characterized by containing the above resin.

The 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 characteristic of being resistant to oil, weak acids, strong acids, alkalis, benzene, and alcohol.

The PC resin preferably has a melt 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 ABS (Acrylonitrile-butadiene-styrene) resin has excellent impact resistance, chemical resistance, and weather resistance, and is particularly excellent in moldability such as injection molding and extrusion molding and secondary processing such as coloring.

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

The ABS resin has a melt 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. It is preferable, but is not limited to this.

The ASA (Acrylate-Styrene-Acrylonitrile) resin has physical properties comparable to that of general ABS, but has excellent impact resistance and high weather resistance, so it can maintain stable physical properties over a long period of time. It is used as an outdoor exterior material. It corresponds to a widely used resin.

The ASA resin preferably has a melt index of 5 to 9 g/10 min at 220°C and 10 kg, and an Izod impact strength of 6.0 to 25.0 kJ/m ² , but is not limited thereto.

Also, in terms of economic efficiency, instead of the PC resin, ABS resin, and ASA resin, regrind resins may be used, which has the advantage of reducing costs.

The skin layer 10 may further include one or more additives selected from the group consisting of lubricants, antioxidants, flame retardants, stabilizers, ultraviolet absorbers, antistatic agents, flame retardants, plasticizers, and foaming agents.

In addition, the base layer 20 may further include one or more additives selected from the group consisting of pigments, pearl particles, lubricants, antioxidants, flame retardants, stabilizers, ultraviolet absorbers, antistatic agents, flame retardants, plasticizers, and foaming agents. The amount of the additive can be appropriately adjusted depending on the purpose and function.

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

Both organic and inorganic pigments can be used as the type of pigment, but it is preferable to use inorganic pigments in terms of the pigment's hiding power between resins and cost. Inorganic pigments are made up of inorganic coloring ingredients, and have greater hiding power and superior heat resistance and light resistance compared to organic pigments.

Types of the organic pigments include azo-based, phthalocyanine-based, dye-based, condensed polycyclic, quinacridone-based, nitro-based and nitroso-based, black-based carbon black, lamp black, acetylene black and channel black. It is not limited to this.

Types of the inorganic pigments include metals, metal oxides, and sulfides, and specifically, cobalt, iron, chromium, copper, zinc, lead, titanium, vanadium, manganese, nickel, calcium carbonate (CaCO3), and talc. (Talc), barium sulfate (BaSO4), silicon oxide (SiO2), aluminum hydroxide (Al(OH)3), kaolin, clay, titanium dioxide (TiO2), carbon black (Carbon Back), iron oxide, zinc oxide. Any one or more selected from the group consisting of (ZnO) and white lead may be used, but are not limited thereto.

Magenta pigments include, 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, 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, There are 139, 147, 151, 153, 154, 167, 172, 180, etc.

Cyan pigments include, for example, C.I. Pigment Blue 1, 2, 3, 15, 15:1, 15:2, 15:3, 15:34, 15:4, 16, 18, 22, 25, There are 60, 65, 66, etc.

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, There are 14, 15, 16, 24, 34, 36, 38, 40, 43, 63, etc.

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

The 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 ㎛, preferably 0.05 to 5 ㎛. If the average particle size of the pigment is less than 0.005㎛, it may be difficult to disperse in the resin and fluidity may be poor, and if it exceeds 15㎛, it may be difficult to develop the desired color.

The pearl particles are intended to provide beautiful aesthetic functions such as reflection by sunlight, lighting, etc., and elegance and color to the sheet layer. The pearl particles are commonly used plate-shaped aluminum particles showing a metallic feel or metallic effect, metal particles such as silver particles, or pearl pigments and minerals having various colors and three-dimensional effects such as black, silver, white, gold, or blue. It can be used as long as it consists of ingredients.

Additionally, 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 base layer and reinforcing layer, and the probability of defects such as coating marks increases. If the viscosity is less than 800 cps, phenomena such as precipitation of metal particles and reduced transfer amount may occur. there is.

The pearl particles are good in the form of flakes with a size of 150 - 250 microns. If the particle size is small, the pearl feeling is deteriorated. If the particle size is large, the pearl feeling is good, but workability is poor, such as sedimentation of the particles. there is.

The lubricant is a substance used to improve fluidity and facilitate processing when heat molding a resin, and is available in the form of metal stearate, ester, amide, and paraffin. At least one of the above may be used, preferably a metal stearate, but it is not limited thereto. Commercially available lubricants include, for example, Hi-Lube (Shinwon Chemical), Mg-St (Songwon), Ca-St (Songwon), Zn-St (Songwon), AX-71 (ADEKA), Loxiol® P-861 ( Emery) etc. can be used.

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

The antioxidants are divided into primary antioxidants and secondary antioxidants when compounding resins. The primary antioxidant is preferably of the phenol type, and is preferably contained in an amount of 0.1 to 0.2 parts by weight based on 100 parts by weight of the resin. The secondary antioxidant is preferably of the phosphate type, and is preferably contained in an amount of 0.1 to 0.2 parts by weight based on 100 parts by weight of the resin.

In addition, another embodiment of the multi-sheet for decoration disclosed in the present specification includes, as shown in the cross-sectional views of FIGS. 2 and 3, a skin layer 10 containing a matte impact-resistant PMMA resin; A first base layer (21) laminated on the bottom of the skin layer and containing an impact-resistant PMMA resin; and a second base layer 22 laminated on the bottom of the first base layer and comprising ABS resin or ASA resin.

At this time, with respect to the entire thickness of the interior sheet, the thickness of the skin layer 10 is 1.5 to 10%, the thickness of the first base layer 21 is 80 to 90%, and the thickness of the second base layer 22 is 1.5 to 10%. The thickness is preferably 5 to 15%, but is not limited thereto. If the thickness of the epidermal layer 10 is less than 1.5% of the total thickness, the surface strength is weak and it may be difficult to implement an emboss effect and a matte touch, and if it exceeds 10%, it becomes thicker than necessary, limiting application and reducing flexibility. This may lead to increased manufacturing costs.

In addition, it may further include a third base layer 23 formed between the first base layer and the second base layer and containing an impact-resistant PMMA resin.

At this time, with respect to the entire thickness of the interior sheet, the thickness of the skin layer 10 is 1.5 to 10%, the thickness of the first base layer 21 is 70 to 80%, and the thickness of the second base layer 22 is is 8 to 12%, and the thickness of the third base layer 23 is preferably 8 to 12%, but is not limited thereto. If the thickness of the epidermal layer 10 is less than 1.5% of the total thickness, the surface strength is weak and it may be difficult to implement an emboss effect and a matte touch, and if it exceeds 10%, it becomes thicker than necessary, limiting application and reducing flexibility. This may lead to increased manufacturing costs.

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

The skin layer 10 is characterized by containing a matte impact-resistant PMMA resin, and since it is the same as described in detail above, description is omitted hereinafter.

The first base layer 21 is laminated on the bottom of the skin layer and contains impact-resistant PMMA resin, thereby effectively improving durability, such as scratch resistance, of the interior sheet. The impact-resistant PMMA resin is the same as described in detail above.

The second base layer 22 is laminated on the bottom of the first base layer and is characterized by containing ABS resin or ASA resin, and the ABS resin and ASA resin are the same as those described in detail above.

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

The skin layer 10 may further include one or more additives selected from the group consisting of lubricants, antioxidants, flame retardants, stabilizers, ultraviolet absorbers, antistatic agents, flame retardants, plasticizers, and foaming agents.

The second base layer and the third base layer further include one or more additives selected from the group consisting of pigments, pearl particles, lubricants, antioxidants, flame retardants, stabilizers, ultraviolet absorbers, antistatic agents, flame retardants, plasticizers, and foaming agents. can do.

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

Hereinafter, the manufacturing method of the interior sheet disclosed in FIGS. 1 to 3 will be 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 using the co-extrusion method, unlike sheets that coat the outer skin layer, no separate coating is required to protect the outer skin layer, and the light transmittance, scratch resistance, and weather resistance of the manufactured sheet are excellent, and its properties are semi-permanent. There is an advantage. In addition, when manufactured by co-extrusion, there is no post-processing because thermosetting coating or ultraviolet coating is not used, so economic efficiency, workability, and productivity are good. In addition, there is a cost reduction effect and the advantage is that it can be manufactured for easy post-molding. there is.

Specifically, the skin layer 10, base layer 20, first base layer 21, second base layer 22, and third base layer 23 are manufactured by extruding using an individual extruder. The extrusion molding temperature of the extruder is preferably 240 to 280 ° C. Here, basically, a number of individual extruders are used equal to the type of resin used in each layer.

In addition, each layer manufactured by extrusion above is laminated on a polishing roll, and the laminating temperature is preferably 100 to 115°C.

The interior sheet disclosed in this specification can be used for furniture finishing materials, automobile interior and exterior materials (roof boxes), home appliance exterior materials (refrigerators, etc.), toy exterior materials or bathtubs, etc. It is preferable to use it as a furniture finishing material, but it is limited to this. no.

The present invention may be better understood by the following examples, which are for illustrative purposes only and are not intended to be limited or limited by the appended claims.

[Example 1]

PC resin is extruded from the main extruder and matte impact-resistant PMMA resin is extruded from the sub-extruder at a molding temperature of 240°C. They are molded by co-extrusion on a T-die and laminated on a polishing roll at 100°C to produce matte impact-resistant PMMA resin. An interior sheet having a total thickness of 0.5 mm is manufactured, including a skin layer having a thickness of 0.05 mm and a base layer containing a PC resin having a thickness of 0.45 mm.

[Example 2]

Impact-resistant PMMA resin is extruded in the main extruder, matte impact-resistant PMMA resin is in the sub-1 extruder, and ABS resin is extruded in the sub-2 extruder at a molding temperature of 240°C. They are molded by co-extrusion in a T-die and polished at 100°C. Laminated in, comprising a skin layer containing a matte impact-resistant PMMA resin and having a thickness of 0.05 mm, a first base layer containing an impact-resistant PMMA resin and having a thickness of 0.85 mm, and a second base layer containing ABS resin and having a thickness of 0.1 mm. , manufacture interior sheets with a total thickness of 1 mm.

[Comparative Example 1]

A multi-sheet for decoration was manufactured in the same manner as in Example 1, except that general PMMA resin was applied to the sub-extruder for extrusion.

[Comparative Example 2]

A multi-sheet for decoration was manufactured in the same manner as in Example 1, except that a general impact-resistant PMMA resin was applied to the sub-extruder for extrusion.

[Comparative Example 3]

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

[Comparative Example 4]

A multi-sheet for decoration was manufactured in the same manner as in Example 2, except that a general impact-resistant PMMA resin was applied to the sub-extruder for extrusion.

[Experimental Example 1] Surface hardness

Pencil hardness was measured and evaluated with a weight of 1kgf according to ASTM D3363 test standards. For exterior application, a rating of H or higher is required.

[Experimental Example 2] Weather resistance

Using a Q-UV tester (QUV/se, Q-LAB) using a UV lamp with a wavelength of 340 nm, set the light quantity to 0.71 W/㎡, 1 cycle (UV mode 4hr, condensation 4hr), then run for 1000 hours in 200 hour increments. The test was carried out until. After completion of the test, the change in yellowing index (YI) (△YI) was measured and calculated according to ASTM E313-73 standard.

[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, leave it at room temperature (23 ± 2℃) for 24 hours, wash and dry, and check the appearance after 24 hours to check the appearance quality. The degree was expressed as excellent, excellent, average, and poor.

The degree of the above physical properties is expressed as follows.

◎: Excellent / ○: Average / △: Insufficient

division Surface hardness (grade) weather resistance Staining resistance Example 1 3H ◎ ◎ Example 2 3H ◎ ◎ Comparative Example 1 H △ △ Comparative Example 2 2H ○ ○ Comparative Example 3 H △ △ Comparative Example 4 2H ○ ○

As shown in the table above, Examples 1 and 2 were excellent in surface hardness, weather resistance, and stain resistance, making them suitable for use as interior sheets.

On the other hand, Comparative Examples 1 and 3 do not contain matte impact-resistant PMMA resin in the skin layer, and the surface hardness, weather resistance, and contamination resistance are significantly lower than those of Examples 1 and 2, so they are not suitable for use as exterior materials. And it was found. In addition, Comparative Example 2 and Comparative Example 4 showed physical properties close to Example 1, but it was found that surface hardness, weather resistance, and stain resistance all fell short of Example 1.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the embodiments described in this specification and the configuration shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention. Since this is not the case, it should be understood that there may be various equivalents and modifications that can replace them at the time of filing this application. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the claims described later rather than the detailed description, and the meaning and scope of the claims and their All changes or modified forms derived from the equivalent concept should be construed as falling within the scope of the present invention.

10: Epidermal layer
20: base layer
21: first substrate layer
22: second substrate layer
23: Third substrate layer

Claims (7)

A skin layer containing a matte, impact-resistant PMMA resin; and
An interior sheet comprising a base layer containing at least one resin selected from the group consisting of PC resin, ABS resin, and ASA resin.
According to paragraph 1,
An interior sheet, characterized in that, with respect to the total thickness of the interior sheet, the thickness of the skin layer is 1.5 to 10%, and the thickness of the base layer is 90 to 98.5%.
A skin layer containing a matte, impact-resistant PMMA resin;
A first base layer laminated on the bottom of the skin layer and containing an impact-resistant PMMA resin; and
An interior sheet that is laminated on the bottom of the first base layer and includes a second base layer containing ABS resin or ASA resin.
According to paragraph 3,
The interior sheet is formed between the first base layer and the second base layer, and further includes a third base layer containing an impact-resistant PMMA resin.
According to paragraph 3,
With respect to the total thickness of the interior sheet, the thickness of the skin layer is 1.5 to 10%, the thickness of the first base layer is 80 to 90%, and the thickness of the second base layer is 5 to 15%. Sheet.
According to paragraph 4,
With respect to the total thickness of the interior sheet, the thickness of the skin layer is 1.5 to 10%, the thickness of the first base layer is 70 to 80%, the thickness of the second base layer is 8 to 12%, and the third base layer is An interior sheet characterized in that the thickness is 8 to 12%.
According to any one of claims 1 to 6,
The matte impact-resistant PMMA resin is an impact-resistant PMMA resin; and
An interior sheet comprising a matting agent containing at least one selected from the group consisting of organic matting agents, inorganic matting agents, and organic-inorganic composite matting agents.