Surface layer material for building

Abstract

To provide a surface layer material for a building, which is high in chemical resistance, heat resistance, and abrasion resistance and is hardly warped.SOLUTION: A surface layer material (1) used as a floor material or a wall material of a building comprises an outermost surface layer (2) exposed to an indoor space side. A polarity component of surface free energy of the outermost surface layer (2) is 40 mJ / m2. A tack force of a surface layer side of the outermost surface layer (2) at 90°C is 200 gf or less. A Young's modulus in a longitudinal direction is 1,000 MPa or more. A heat shrinkage ratio when heated at 120°C for 10 minutes is 1% or less.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a surface material for buildings. [Background technology]

[0002] For example, in buildings such as houses, stores, hospitals, etc., surface layer materials are used to finish flooring or wall materials. An example of such a surface layer material is disclosed in Japanese Patent Laid-Open Publication No. 6-286066 (Patent Document 1). Patent Document 1 discloses that polyvinyl chloride resin is used as the material for the surface layer material.

[0003] However, if the outermost layer exposed to the interior space is made of polyvinyl chloride resin, there are problems such as irreversible coloration when colored chemicals adhere to it, poor productivity due to its weakness to high heat, susceptibility to wear from repeated sliding against other objects, and a tendency to warp depending on the material of the material to which the outermost layer is attached. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-286066 Summary of the Invention [Problem to be solved by the invention]

[0005] It is desirable to develop a surface layer material for buildings that is excellent in chemical resistance, heat resistance, and abrasion resistance, and that is also resistant to warping. [Means for solving the problem]

[0006] As a result of repeated and intensive research, the inventors have discovered that the polar component of the surface free energy of the outermost layer is related to the ease / resistance of coloring when a colored chemical adheres to it. They have also discovered that the magnitude of the tackiness of the surface side of the outermost layer is related to the vulnerability / resistance to high heat. They have also discovered that the magnitude of the Young's modulus in the longitudinal direction of the entire surface layer material is related to the ease / resistance of wear when repeatedly sliding against other objects. They have also discovered that the thermal shrinkage rate is related to the ease / resistance of warping of the surface layer material. The present invention is based on these findings.

[0007] The surface layer material for buildings according to the present invention is A surface material used for flooring or wall materials of buildings, It has the outermost layer exposed to the interior space, The polar component of the surface free energy of the outermost layer is 40 mJ / m 2 is as follows: The tack strength of the surface layer side of the outermost layer measured according to the following condition A is 200 gf or less, The Young's modulus in the longitudinal direction measured in accordance with JIS Z 1702:1994 is 1000 MPa or more, According to JIS K 7133, the heat shrinkage rate is 1% or less when heated at 120°C for 10 minutes.

[0008] Here, condition A is as follows: Condition A: A circular stainless steel surface with a diameter of 5 mm is pressed against the surface at a pressing speed of 0.5 mm / sec, and the surface is held at a temperature of 90°C with a load of 2500 gf for 20 seconds. After this, the maximum load (gf) applied when peeling off the surface at a pulling speed of 15 mm / sec is measured.

[0009] According to this configuration, the polar component of the surface free energy of the outermost layer is 40 mJ / m 2By keeping the tackiness at 90°C or less on the surface side of the outermost layer, even if a colored chemical adheres to the outermost layer, the color of the chemical is less likely to be transferred to the outermost layer. Furthermore, by keeping the tackiness at 90°C on the surface side of the outermost layer to 200 gf or less, the outermost layer will hardly stick to the roll even when heated and fed into a laminating machine (i.e., high heat resistance), thereby improving productivity. Furthermore, by making the Young's modulus of the entire surface layer material 1000 MPa or more, scratches on the surface will be less likely to occur even if other objects repeatedly slide over it (i.e., improved abrasion resistance). Furthermore, by keeping the thermal shrinkage rate to 1% or less, overall warpage can be reduced regardless of the material of the mating material to be bonded to the outermost layer. Therefore, a building surface layer material that is excellent in chemical resistance, heat resistance, and abrasion resistance, as well as warpage resistance, can be provided.

[0010] Preferred embodiments of the present invention will be described below, but the scope of the present invention is not limited to the preferred embodiments described below.

[0011] In one embodiment, The outermost layer preferably contains a polyester resin.

[0012] This configuration makes it possible to appropriately realize a surface layer material for buildings that is excellent in chemical resistance, heat resistance, and abrasion resistance and is resistant to warping in terms of the constituent materials.

[0013] In one embodiment, The overall haze is preferably 40% or less.

[0014] This configuration can improve transparency, and for example, when a printed layer is provided below, the visibility of the printed layer can be improved.

[0015] In one embodiment, It is preferable that the contact angle of the outermost layer with pure water is 75° or less.

[0016] According to this configuration, the hydrophilicity of the outermost layer can be increased, and even if dirt adheres to the surface of the outermost layer, the dirt can be easily removed.

[0017] In one embodiment, The outermost layer preferably contains a wax having a weight average molecular weight of 1,000 or more and 15,000 or less.

[0018] This configuration can further improve heat resistance and increase productivity.

[0019] Further features and advantages of the present invention will become more apparent from the following description of exemplary and non-limiting embodiments, which is given with reference to the drawings. [Brief explanation of the drawings]

[0020] [Figure 1] Schematic diagram of a surface layer material according to an embodiment [Figure 2] Schematic diagram of another surface layer material [Figure 3] Schematic diagram of another surface layer material [Figure 4] Schematic diagram of another surface layer material [Figure 5] Schematic diagram of flooring materials including surface materials DETAILED DESCRIPTION OF THE INVENTION

[0021] An embodiment of a surface material will be described with reference to the drawings. The surface material 1 of this embodiment is a surface material for buildings (a surface material for buildings) and is used as a floor material 10 or wall material for buildings. Examples of buildings include residential houses as well as offices, stores, schools, hospitals, etc. In this embodiment, the surface material 1 is used as a floor material 10 or wall material for a washroom in a house. As shown in FIG. 1, the surface material 1 comprises an outermost layer 2, an intermediate layer 3, and an adhesive layer 4. These are laminated in the order of outermost layer 2 → intermediate layer 3 → adhesive layer 4.

[0022] The outermost layer 2 is the layer located on the outermost side and is exposed to the interior space side of the building. The material constituting the outermost layer 2 is not particularly limited, but preferably contains a polyester-based resin.

[0023] Examples of polyester-based resins include polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, and polybutylene naphthalate. The polyester-based resin may be any of the above-mentioned resins that have been chemically modified (e.g., modified polyethylene terephthalate or modified polybutylene terephthalate). When the outermost layer 2 is made of a polyester-based resin, it is particularly preferable that the polyester contains polybutylene terephthalate or modified polyethylene terephthalate. Examples of modified polyethylene terephthalate include glycol-modified polyethylene terephthalate (G-PET), isophthalic acid-modified polyethylene terephthalate (IPA-PET), and isosorbide-modified polyethylene terephthalate (IS-PET).

[0024] The outermost layer 2 may also contain a wax. Examples of waxes include hydrocarbon waxes such as polyethylene wax, polypropylene wax, polypropylene-polyethylene copolymer wax, and paraffin wax, fatty acid ester wax, and oxides thereof. These may be used alone or in combination of two or more. The weight-average molecular weight of the wax that may be contained in the outermost layer 2 is not particularly limited, but is preferably 1,000 or more and 15,000 or less. The weight-average molecular weight of the wax is more preferably 2,000 or more and 10,000 or less, and even more preferably 3,000 or more and 6,000 or less.

[0025] The surface free energy γ of the outermost layer 2 is not particularly limited, but may be, for example, 100 mJ / m 2 The surface free energy γ of the outermost layer 2 can be set to 80 mJ / m or less. 2 Preferably, it is 70 mJ / m or less. 2 More preferably, it is:

[0026] Generally, the surface free energy γ is expressed as the sum of a dispersion component γd, a polar component γp, and a hydrogen bond component γh. The fact that the polar component γp among these is related to the ease / resistance of coloring when a colored chemical adheres is a new finding obtained through the inventor's investigations. The outermost layer 2 of this embodiment has a polar component γp of the surface free energy γ of 40 mJ / m 2 The polar component γp is 40 mJ / m 2 By keeping the polarity γp of the surface free energy γ of the outermost layer 2 below 35 mJ / m, even if a colored chemical adheres to the outermost layer 2, the color of the chemical is less likely to be transferred to the outermost layer 2. 2 Preferably, it is 30 mJ / m or less. 2 More preferably, it is 20 mJ / m or less. 2 It is even more preferable that:

[0027] The tack strength of the surface side of the outermost layer 2 is 200 gf or less. The tack strength here refers to the maximum load (gf) applied when a 5 mm diameter circular stainless steel surface is pressed against the surface at a pressing speed of 0.5 mm / sec, held at a temperature of 90°C with a load of 2500 gf for 20 seconds, and then peeled off from the surface at a pulling speed of 15 mm / sec. By making the tack strength of the surface side of the outermost layer 2 at 90°C 200 gf or less, when laminating the outermost layer 2 with other layers (intermediate layer 3 or adhesive layer 4), even if the heated layer is fed into a laminating machine, there is almost no sticking to the roll (i.e., high heat resistance), and productivity can be improved. The tack strength of the surface side of the outermost layer 2 at 90°C is preferably 180 gf or less, more preferably 150 gf or less, and even more preferably 130 gf or less.

[0028] The contact angle of the outermost layer 2 with pure water is not particularly limited, but can be, for example, 75° or less. By keeping the contact angle of the outermost layer 2 with pure water at 75° or less, the hydrophilicity of the surface side of the outermost layer 2 can be increased, and even if dirt adheres to the surface of the outermost layer 2, the dirt can be easily removed. The contact angle of the outermost layer 2 with pure water may be 70° or less, or may be 60° or less. Furthermore, the contact angle of the outermost layer 2 with pure water is preferably 50° or less, more preferably 40° or less, and even more preferably 30° or less.

[0029] The thickness of the outermost layer 2 is not particularly limited, but can be, for example, 1 μm or more and 50 μm or less. The thickness of the outermost layer 2 is preferably 5 μm or more and 30 μm or less, and more preferably 10 μm or more and 20 μm or less.

[0030] The intermediate layer 3 is a layer interposed between the outermost layer 2 and the adhesive layer 4. The intermediate layer 3 is provided to impart various properties to the surface layer material 1. There are no particular limitations on the material that constitutes the intermediate layer 3, and a material can be used that corresponds to the properties to be imparted to the surface layer material 1. In this embodiment, the intermediate layer 3 is a gas barrier layer that imparts gas barrier properties to the surface layer material 1, and is preferably made of a polyester resin, and more preferably contains polybutylene terephthalate.

[0031] The thickness of the intermediate layer 3 is not particularly limited, but can be, for example, 5 μm to 60 μm. The thickness of the intermediate layer 3 is preferably 8 μm to 50 μm, and more preferably 10 μm to 40 μm.

[0032] The adhesive layer 4 is provided on the back surface side of the outermost layer 2, sandwiching the intermediate layer 3 therebetween. The material constituting the adhesive layer 4 is not particularly limited, but it is preferable to use a material with good adhesive properties to adhere the outermost layer 2 and the intermediate layer 3 to other layers such as a base material. The adhesive layer 4 may also serve as a flexible layer. In this case, it is more preferable to use a material constituting the adhesive layer 4 with good flexibility. The material constituting the adhesive layer 4 preferably includes at least one of polyethylene resin, polystyrene resin, polyester resin, urethane resin, and acrylic resin. The material constituting the adhesive layer 4 may also include a copolymer of the above-mentioned resins with other components.

[0033] Among these, it is preferable that the adhesive layer 4 contains a polyester-based resin. Examples of polyester-based resins include polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, and polybutylene naphthalate. The polyester-based resin may be a chemically modified version of any of the above (e.g., modified polyethylene terephthalate, modified polybutylene terephthalate, etc.). Among these, modified polyethylene terephthalate is preferable, and glycol-modified polyethylene terephthalate is particularly preferable.

[0034] The adhesive layer 4 may be configured as a single layer or may be configured by laminating multiple layers. As shown in Fig. 1, the adhesive layer 4 of this embodiment has a single layer configuration.

[0035] The thickness of the adhesive layer 4 (total thickness in the case of a multi-layer structure) is not particularly limited, but can be, for example, 10 μm to 100 μm. The thickness of the adhesive layer 4 is preferably 20 μm to 90 μm, and more preferably 30 μm to 85 μm.

[0036] The overall thickness of the surface layer material 1, which is a laminate of the outermost layer 2, the intermediate layer 3, and the adhesive layer 4, is not particularly limited, but can be, for example, 20 μm to 200 μm. The thickness of the surface layer material 1 is preferably 65 μm to 160 μm, and more preferably 80 μm to 120 μm.

[0037] The Young's modulus in the longitudinal direction of the surface layer material 1 is 1000 MPa or more. Here, the "longitudinal direction" refers to the direction in which the long sheet extends when formed into a long sheet, and is usually the MD (machine direction) of the resin film constituting the outermost layer 2. The Young's modulus is measured in accordance with JIS Z 1702:1994. When the Young's modulus of the entire surface layer material 1 in the longitudinal direction is 1000 MPa or more, scratches on the surface of the surface layer material 1 are less likely to occur even when other objects repeatedly slide against it (i.e., wear resistance is improved). The Young's modulus in the longitudinal direction of the surface layer material 1 is preferably 1200 MPa or more, more preferably 1400 MPa or more, and even more preferably 1500 MPa or more. The upper limit of the Young's modulus is not particularly limited, but may be, for example, 2000 MPa or less or 1700 MPa or less.

[0038] The surface layer material 1 preferably has a thermal shrinkage rate of 1% or less in the longitudinal and lateral directions when heated at 120°C for 10 minutes. Here, the "longitudinal direction" is as described above. The "lateral direction" is the direction perpendicular to the longitudinal direction (the width direction of the long sheet when formed into a long sheet), and is usually the TD direction (transverse direction; vertical direction) of the resin film constituting the outermost layer 2. The thermal shrinkage rate is measured in accordance with JIS K 7133. When the thermal shrinkage rate of the surface layer material 1 in the longitudinal and lateral directions is 1% or less, warping of the surface layer material can be reduced regardless of the material of the mating material to be bonded to the outermost layer.

[0039] The overall haze of the surface layer material 1 is not particularly limited, but is preferably 40% or less. Here, the overall haze can be measured in accordance with JIS K 7136:2000. When the overall haze of the surface layer material 1 is 40% or less, transparency can be increased, and the visibility of the printing layer 20 (see FIG. 4) that may be provided below can be improved. The overall haze of the surface layer material 1 is more preferably 35% or less, and even more preferably 30% or less.

[0040] Although not shown in the figure, a protective release sheet may be attached to the adhesive surface of the adhesive layer 4 (the surface opposite to the outermost layer 2).

[0041] Although the above describes an example in which the adhesive layer 4 has a single layer structure, the adhesive layer 4 is not limited to such a structure, and may have a multi-layer structure, for example, as shown in Fig. 2. In the example shown in this figure, the adhesive layer 4 includes a first adhesive layer 4A laminated on the back surface side of the intermediate layer 3, and a second adhesive layer 4B laminated on the back surface side of the first adhesive layer 4A.

[0042] The first adhesive layer 4A preferably contains a polyethylene resin or a polyester resin from among the various constituent materials of the adhesive layer 4 described above. Examples of polyethylene resins include polyethylenes such as high-density polyethylene, medium-density polyethylene, and low-density polyethylene, and ethylene copolymers such as ethylene-vinyl acetate copolymer and ethylene-vinyl alcohol copolymer. The first adhesive layer 4A preferably contains an ethylene copolymer having a melting point of 85°C or less, and more preferably contains an ethylene-vinyl acetate copolymer having a melting point of 85°C or less.

[0043] Examples of polyester-based resins include polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, and polybutylene naphthalate. The polyester-based resin may be a chemically modified version of any of the above (for example, modified polyethylene terephthalate or modified polybutylene terephthalate (including polyethylene terephthalate in which part of ethylene glycol is substituted with 1,4-cyclohexanedimethanol)). Of these, modified polyethylene terephthalate is preferred, and glycol-modified polyethylene terephthalate is particularly preferred.

[0044] The second adhesive layer 4B preferably contains an acrylic resin or a urethane resin among the various constituent materials of the adhesive layer 4. Examples of acrylic resins include polyacrylic acid; polymethacrylic acid; polyacrylic acid esters such as polymethyl acrylate, polyethyl acrylate, polybutyl acrylate, and poly2-ethylhexyl acrylate; polymethacrylic acid esters such as polymethyl methacrylate, polyethyl methacrylate, and polybutyl methacrylate; polyacrylonitrile; polymethacrylonitrile; polyacrylamide; and polyacrylics grafted with amide groups.

[0045] In addition, although the above description has been given of an example in which the surface layer material 1 includes the outermost layer 2, the intermediate layer 3, and the adhesive layer 4, the present invention is not limited to such a configuration, and other layers may be additionally included. Alternatively, as shown in Fig. 3, the surface layer material 1 may be configured with only the outermost layer 2 and the adhesive layer 4, or as shown in Fig. 4, the surface layer material 1 may be configured with only the outermost layer 2.

[0046] Although the intermediate layer 3 is a gas barrier layer in the above example, the intermediate layer 3 is not limited to such a configuration and may be a layer having other functions. For example, the intermediate layer 3 may be a flexible layer that provides flexibility.

[0047] As shown in Fig. 5, the surface material 1 of this embodiment can be used by being incorporated into a floor material 10. In the following explanation, for the sake of convenience, the upper side in Fig. 5 may be referred to as "upper" and the lower side as "lower."

[0048] As shown in Figure 5, the flooring material 10 includes a surface material 1, a printed layer 20, a primer layer 30, and a backing layer 40. The printed layer 20 is laminated below the surface material 1, the primer layer 30 is laminated below that, and the backing layer 40 is laminated below that.

[0049] The print layer 20 is a layer containing at least a colorant and has a desired design applied thereto. Examples of the design include wood grain, stone grain, sand grain, fabric grain, tiled, brickwork, leather-grained, geometric shapes, abstract patterns, letters, and symbols.

[0050] The printed layer 20 can be formed, for example, by a printing method using an ink obtained by dissolving a known dye together with a binder resin in a solvent, or an ink obtained by dispersing a known pigment together with a binder resin in a dispersion medium. Examples of printing methods include gravure printing, offset printing, screen printing, flexographic printing, electrostatic printing, and inkjet printing. Furthermore, when the printed layer 20 is formed as a solid colored concealing layer covering the entire surface, various coating methods can be used, such as roll coating, knife coating, air knife coating, die coating, lip coating, comma coating, kiss coating, flow coating, and dip coating.

[0051] The thickness of the printed layer 20 in the flooring material 10 is not particularly limited, but is preferably, for example, 3 μm or less.

[0052] The primer layer 30 is composed of a resin capable of bonding the printing layer 20 and the backing layer 40 together. Examples of materials that can be used to form the primer layer 30 include ester-based resins, urethane-based resins, acrylic-based resins, polycarbonate-based resins, polyvinyl chloride-based resins, vinyl chloride-vinyl acetate copolymers, polyvinyl butyral-based resins, and nitrocellulose-based resins. These may be used alone or in combination of two or more. The primer layer 30 can be formed using an appropriate coating method, such as roll coating or gravure printing.

[0053] The backing layer 40 is a buffer layer in the flooring material 10 for the purpose of shock absorption, etc. Examples of materials constituting the backing layer 40 include polyvinyl chloride, polypropylene, ethylene-vinyl alcohol copolymer, polymethylene, polymethylpentene, polyethylene terephthalate, highly heat-resistant polyalkylene terephthalate (e.g., polyethylene terephthalate in which part of the ethylene glycol is substituted with 1,4-cyclohexanedimethanol or diethylene glycol), polybutylene terephthalate, polyethylene naphthalate, polyethylene naphthalate-isophthalate copolymer, polycarbonate, polyarylate, polyimide, polystyrene, polyamide, and ABS. These materials may be used alone or in combination of two or more. The thickness of the backing layer 40 is not particularly limited, but is preferably 2 mm or more and 10 mm or less.

[0054] The flooring material 10 can be produced by providing a printing layer 20 under the adhesive layer 4 of the surface material 1, applying a primer layer 30, and then overlaying and thermally laminating a backing layer 40. The flooring material 10 may be a laid tile (for example, a square tile with one side measuring 450 mm to 500 mm) or a wide, long sheet.

[0055] 5, the flooring material 10 is described as having the surface layer material 1 (outermost layer 2, intermediate layer 3, and adhesive layer 4), printing layer 20, primer layer 30, and backing layer 40 in this order, but is not limited to such a configuration and may be configured to have other layers added. Alternatively, the flooring material 10 may be configured without one or more of the printing layer 20, primer layer 30, and backing layer 40. The positions of the printing layer 20 and primer layer 30 may also be reversed.

[0056] The present invention will be explained in more detail below with reference to several test examples, but the scope of the present invention is not limited to the specific test examples described below.

[0057] [Test Example 1] The outermost layer is made of a material with a density of 1.34 g / cm 3 A sheet material containing isophthalic acid-modified polyethylene phthalate (IP252B, manufactured by Bell Polyester Products) as the primary material was prepared. In addition to the isophthalic acid-modified polyethylene phthalate, this sheet material also contained a filler (SC10-32F, manufactured by Nippon Steel Chemical & Material Co., Ltd.) and an oxidized polyethylene wax with a weight-average molecular weight of 4200 (PED521, manufactured by Clariant Co., Ltd.). A sheet material containing polybutylene terephthalate (1100-630S, manufactured by Changchun Petrochemical Co., Ltd.) as the primary material was prepared for the intermediate layer. A sheet material containing glycol-modified polyethylene terephthalate (S2008, manufactured by SK Chemical Co., Ltd.) as the primary material was prepared for the adhesive layer. These layers were co-extruded and laminated in a die to form a 10 μm outermost layer, a 15 μm intermediate layer, and a 75 μm adhesive layer, forming a single molten resin laminate that was then cooled and solidified to obtain the surface layer material of Test Example 1.

[0058] [Test Example 2] The outermost layer is made of a material with a density of 1.34 g / cm 3A sheet material containing isophthalic acid-modified polyethylene phthalate (IP252B, manufactured by Bell Polyester Products) as the primary material was prepared. In addition to the isophthalic acid-modified polyethylene phthalate, this sheet material also contained a filler (SC10-32F, manufactured by Nippon Steel Chemical & Material Co., Ltd.) and a polyethylene wax with a weight-average molecular weight of 6000 (PE520, manufactured by Clariant Co., Ltd.). A sheet material containing polybutylene terephthalate (1100-630S, manufactured by Changchun Petrochemical Co., Ltd.) as the primary material was prepared for the intermediate layer. A sheet material containing glycol-modified polyethylene terephthalate (S2008, manufactured by SK Chemical Co., Ltd.) as the primary material was prepared for the adhesive layer. These layers were co-extruded and laminated in a die to form a 10 μm outermost layer, a 15 μm intermediate layer, and a 75 μm adhesive layer, forming a single molten resin laminate that was then cooled and solidified to obtain the surface layer material of Test Example 2.

[0059] [Test Example 3] The outermost layer is made of a material with a density of 1.34 g / cm 3 A sheet material containing isophthalic acid-modified polyethylene phthalate (IP252B, manufactured by Bell Polyester Products) as the main material was prepared. In addition to isophthalic acid-modified polyethylene phthalate, this sheet material also contained a filler (SC10-32F, manufactured by Nippon Steel Chemical & Material), a polyethylene wax with a weight-average molecular weight of 6000 (PE520, manufactured by Clariant), and an anti-fogging agent (S-618-A1, manufactured by Takemoto Oil & Fat). A sheet material containing polybutylene terephthalate (1100-630S, manufactured by Changchun Petrochemical) as the main material was prepared for the intermediate layer. A sheet material containing glycol-modified polyethylene terephthalate (S2008, manufactured by SK Chemical) as the main material was prepared for the adhesive layer. These were co-extruded and laminated in a die so that the outermost layer was 10 μm, the middle layer was 15 μm, and the adhesive layer was 75 μm, forming a single molten resin laminate, which was then cooled and solidified to obtain the surface material of Test Example 3.

[0060] [Test Example 4] The outermost layer is made up of a material with a density of 1.31 g / cm 3A sheet material containing polybutylene terephthalate (Chang Chun Petrochemical Co., Ltd., 1100-630S) as the main material was prepared. A sheet material containing glycol-modified polyethylene terephthalate (SK Chemical Co., Ltd., S2008) as the main material for the adhesive layer was prepared. These were co-extruded and laminated in a die so that the outermost layer was 15 μm thick and the adhesive layer was 85 μm thick to form a single molten resin laminate, which was then cooled and solidified to obtain the surface layer material of Test Example 4.

[0061] [Test Example 5] The outermost layer is made of a material with a density of 1.25 g / cm 3 A sheet material containing isosorbide-modified polyethylene terephthalate (SK Chemical, T95) as the main material was prepared. In addition to the isosorbide-modified polyethylene terephthalate, this sheet material also contained silica as an antiblocking agent. A sheet material containing polybutylene terephthalate (Changchun Petrochemical, 1100-630S) as the main material for the intermediate layer was prepared. A sheet material containing glycol-modified polyethylene terephthalate (SK Chemical, S2008) as the main material for the adhesive layer was prepared. These were co-extruded and laminated in a die to form a 20 μm outermost layer, a 15 μm intermediate layer, and a 65 μm adhesive layer, forming a single molten resin laminate, which was then cooled and solidified to obtain the surface layer material of Test Example 5.

[0062] [Test Example 6] The outermost layer is made of a material with a density of 0.96 g / cm 3 A sheet material containing high-density polyethylene (4010, manufactured by Tosoh) as the main material was prepared. A sheet material containing linear low-density polyethylene (4040FC, manufactured by Ube Maruzen Polyethylene) as the main material for the intermediate layer was prepared. A sheet material containing ethylene-vinyl acetate copolymer (P2505C, manufactured by Mitsui Dow Polychemicals) with a melting point of 77°C as the main material for the adhesive layer was prepared. These were co-extruded and laminated in a die to form a 20 μm outermost layer, a 65 μm intermediate layer, and a 15 μm adhesive layer, forming a single molten resin laminate, which was then cooled and solidified to obtain the surface layer material of Test Example 6.

[0063] [Test Example 7] The outermost layer is made of a material with a density of 1.34 g / cm 3 A sheet material containing isophthalic acid-modified polyethylene phthalate (IP252B, manufactured by Bell Polyester Products) as the primary material was prepared. In addition to the isophthalic acid-modified polyethylene phthalate, this sheet material also contained a filler (SC10-32F, manufactured by Nippon Steel Chemical & Material Co., Ltd.). A sheet material containing polybutylene terephthalate (1100-630S, manufactured by Changchun Petrochemical Co., Ltd.) as the primary material for the intermediate layer was prepared. A sheet material containing glycol-modified polyethylene terephthalate (S2008, manufactured by SK Chemical Co., Ltd.) as the primary material for the adhesive layer was prepared. These were co-extruded and laminated in a die to form a 10 μm outermost layer, a 15 μm intermediate layer, and a 75 μm adhesive layer, forming a single molten resin laminate that was then cooled and solidified to obtain the surface layer material of Test Example 7.

[0064] [Test Example 8] The outermost layer is made of a material with a density of 1.34 g / cm 3 A sheet material containing isophthalic acid-modified polyethylene phthalate (IP252B, manufactured by Bell Polyester Products) as the primary material was prepared. In addition to the isophthalic acid-modified polyethylene phthalate, this sheet material also contained a filler (SC10-32F, manufactured by Nippon Steel Chemical & Material Co., Ltd.) and an oxidized polyethylene wax with a weight-average molecular weight of 18,000 (PED191, manufactured by Clariant Co., Ltd.). A sheet material containing polybutylene terephthalate (1100-630S, manufactured by Changchun Petrochemical Co., Ltd.) as the primary material was prepared for the intermediate layer. A sheet material containing glycol-modified polyethylene terephthalate (S2008, manufactured by SK Chemical Co., Ltd.) as the primary material was prepared for the adhesive layer. These layers were co-extruded and laminated in a die to form a 10 μm outermost layer, a 15 μm intermediate layer, and a 75 μm adhesive layer. This laminate was then cooled and solidified to obtain the surface layer material of Test Example 8.

[0065] [Test Example 9] The outermost layer is made of a material with a density of 1.27 g / cm3 A sheet material containing glycol-modified polyethylene phthalate (SK Chemical, S2008) as the main material was prepared. In addition to glycol-modified polyethylene phthalate, this sheet material also contained a filler (Nippon Steel Chemical & Material, SC10-32F). A sheet material containing polybutylene terephthalate (Changchun Petrochemical, 1100-630S) as the main material was prepared for the intermediate layer. A sheet material containing glycol-modified polyethylene terephthalate (SK Chemical, S2008) as the main material was prepared for the adhesive layer. These were co-extruded and laminated in a die to form a 15 μm outermost layer, a 15 μm intermediate layer, and a 70 μm adhesive layer, forming a single molten resin laminate, which was then cooled and solidified to obtain the surface layer material of Test Example 9.

[0066] [Table 1]

[0067] The resulting surface layer material of each test example was measured for water contact angle, Young's modulus in the longitudinal direction (MD direction), total light transmittance, overall haze, tack strength, and thermal shrinkage.

[0068] The contact angle with water was calculated by dropping a droplet of water on the surface of the outermost layer, taking a photograph with a camera, and analyzing the resulting photographed image.

[0069] The surface free energy γ and its polar component γp were calculated using the Kitazaki-Hata equation after measuring the contact angles with diiodomethane and hexadecane in addition to the contact angle with water.

[0070] The Young's modulus was determined based on the stress-strain curve obtained by performing a tensile test in accordance with JIS Z 1702:1994 using a tensile tester (Tensilon RTH-1225 manufactured by A&D).

[0071] The total light transmittance was measured using a haze meter (NDH 2000, manufactured by Nippon Denshoku Kogyo Co., Ltd.) in accordance with JIS K 7361-1 (1997) under illuminant D65.

[0072] The overall haze was measured using a haze meter (manufactured by Nippon Denshoku Kogyo Co., Ltd., NDH 2000) in accordance with JIS K 7136 (2000).

[0073] The tack strength was measured by pressing a 5 mm diameter circular stainless steel surface against the surface at a pressing speed of 0.5 mm / sec, holding the surface at a temperature of 90°C with a load of 2500 gf for 20 seconds, and then measuring the maximum load (gf) applied when peeling it off from the surface at a pulling speed of 15 mm / sec. The measured value was taken as the tack strength.

[0074] The heat shrinkage was calculated under conditions of a heating temperature of 120°C and a heating time of 10 minutes in accordance with JIS K 7133. Calculations were made for both the longitudinal direction (MD) and the transverse direction (TD).

[0075] Two surface materials for each test example were prepared, and the coloring agent and mold remover were dropped onto them separately. After leaving them for one day, the surface materials were washed by rubbing them in water, and the presence or absence of coloring was visually judged according to the following criteria. 〇: Almost no coloring △: Slightly colored, but barely noticeable ×: Coloring is obvious at a glance

[0076] Furthermore, the surface layer material of each test example was laminated on a base layer having a pattern on the surface, and the visibility of the pattern was visually judged according to the following criteria. 〇: The underlying image is clearly visible ×: The underlying pattern is difficult to see

[0077] In addition, oleic acid and water, which are similar to sebum stains, were dropped onto the surface material of each test example, and after 5 minutes, the stains were wiped off with Kimwipes, and the ease of stain removal was visually evaluated according to the following criteria. 〇: Dirt (sliminess) is almost completely removed △: A little dirt (slimy) remains, but it is barely noticeable ×: Dirt (sliminess) remains

[0078] Furthermore, the surface layer material of each test example was brought into contact with a hot plate heated to 90°C for 20 seconds, and then peeled off, and the releasability was visually evaluated according to the following criteria. 〇: Peels off immediately ×: Slightly sticky and difficult to peel off

[0079] The surface material of each test example was attached to a 2 mm thick, 10 cm square vinyl chloride cushion floor using a press, and the presence or absence of warping was visually judged according to the following criteria. 〇: When pressing one edge of the corner, the diagonal warp height is less than 2 cm ×: When pressing one edge of the corner, the diagonal warp height is 2 cm or more

[0080] In addition, the surface of the surface layer material of each test example was subjected to a pressure of 60 kgf / cm 2 The deck brush was run back and forth 1000 times while applying a load of 1000 mm, and the presence or absence of wear was visually judged according to the following criteria. ○: No wear was observed ×: Worn

[0081] These results are shown below.

[0082] [Table 2]

[0083] From these results, the polar component of the surface free energy is 40 mJ / m 2The surface layer materials of Test Examples 1 to 4 and 9, which have a tack strength of 200 gf or less at 90°C, a Young's modulus in the longitudinal direction (MD) of 1000 MPa or more, and a thermal shrinkage rate (in both MD and TD) of 1% or less at 120°C for 10 minutes, were confirmed to have excellent chemical resistance (resistance to staining even when colored chemicals adhere), high heat resistance (good releasability from hot plates), excellent abrasion resistance (no abrasion even when repeatedly scrubbed), and resistance to warping.

[0084] Although the surface layer material has been described in detail above by showing specific embodiments and test examples, the present invention is not limited thereto. The embodiments disclosed in this specification are illustrative in all respects and can be appropriately modified within the scope of the present disclosure. [Explanation of symbols]

[0085] 1 Surface material 2 Top layer 3. Middle class 4 Adhesive layer 4A First adhesive layer 4B Second adhesive layer 10 Flooring 20 printing layer 30 primer layer 40 Backing Layer

Claims

1. A surface material used for flooring or wall materials of buildings, It has the outermost layer exposed to the interior space, The polar component of the surface free energy of the outermost layer is 40 mJ / m ２ is as follows: the tack strength of the surface layer side of the outermost layer measured according to the following condition A is 200 gf or less, The Young's modulus in the longitudinal direction measured in accordance with JIS Z 1702:1994 is 1000 MPa or more, A surface layer material for buildings that has a thermal shrinkage rate of 1% or less when heated at 120°C for 10 minutes in accordance with JIS K 7133. [Condition A: A circular stainless steel surface with a diameter of 5 mm is pressed against the surface at a pressing speed of 0.5 mm / sec, and is maintained at a temperature of 90°C under a load of 2500 gf for 20 seconds. After that, the maximum load (gf) applied when peeling off the surface from the surface at a pulling speed of 15 mm / sec is measured.]

2. The building surface material according to claim 1 , wherein the outermost layer comprises a polyester resin.

3. 2. The architectural surface material according to claim 1, wherein the overall haze is 40% or less.

4. 2. The building surface material according to claim 1, wherein the contact angle of the outermost layer with pure water is 75° or less.

5. 2. The building surface material according to claim 1, wherein the outermost layer contains a wax having a weight average molecular weight of 1,000 or more and 15,000 or less.

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