JP2010019065A - Olefine based floor member - Google Patents

Abstract

[PROBLEMS] To provide a floor with sufficient adhesion strength to a floor, excellent in dimensional stability, without causing bulging or pushing up, and having a high frequency of walking, even in an environment where the temperature changes rapidly, such as a railway vehicle. To provide an olefin-based flooring that does not cause severe wear and scratches.
A flooring material 1 comprising an olefinic resin composition, comprising a surface resin layer 2 containing an olefinic resin, and a base material containing an olefinic resin via an adhesive layer 5 on the lower surface. The material layer 3 is laminated and integrated, the tensile modulus of the outermost surface layer of the surface resin layer is 750 MPa or more, the tensile modulus of elasticity of the entire surface resin layer is 70 to 700 MPa, and the base material layer By setting the linear expansion coefficient to 5 × 10 −5 × K−1 or less, it is possible to prevent the phenomenon of swelling and push-up and to provide a floor material that does not cause severe wear or damage.
[Selection] Figure 1

Description

The present invention relates to an olefin-based flooring used as a flooring of a building such as a building, a condominium, a house, or a commercial facility, or a flooring of a vehicle such as a railway or a bus.

Conventionally, as a flooring material for buildings such as buildings, condominiums, houses, and commercial facilities, or a flooring material for vehicles such as railways and buses, those made of polyvinyl chloride resin (PVC) are often used. In recent years, flooring has a problem in terms of disaster prevention because it generates toxic gases such as hydrogen chloride along with a large amount of smoke during combustion, and it also causes environmental pollution when incinerated and discarded. Olefin-based flooring materials are increasingly used.

Such a flooring is usually provided with a design such as a pattern, a pattern, or a character by printing or the like. For example, a base material layer made of a polyolefin resin, a printing layer, and a surface layer made of a polyolefin resin in this order. Olefin-based flooring having a structure in which each layer of a laminated sheet laminated is bonded with a reactive hot melt adhesive is known. (See Patent Document 1)

Moreover, in patent document 2, it is a flooring which has the laminated structure of two or more layers which have an olefin resin as a main component, Comprising: Wax is uniformly contained in a surface layer and an inorganic filler is used in a back surface layer And rosin are uniformly contained, and the flooring material is disclosed in which the fiber layer is embedded and the fiber layer is exposed on the lower surface of the back surface layer, and has good adhesiveness and dimensional stability, and there is a risk of swelling and peeling. There is no olefinic flooring.

Moreover, the applicant has applied for a non-halogen floor material excellent in wear resistance, stain resistance, dimensional stability, and workability as Patent Document 3.
JP 2000-229390 A JP-A-9-151595 JP 2002-52654 A

However, in the flooring materials in these patent documents, the thermal expansion of the flooring material itself cannot be suppressed by the adhesive strength with the floor under an environment where the temperature changes rapidly, such as a railcar, while being used. It did not suffice as a flooring material because it caused blistering or thrusting, or developed peeling. Furthermore, floors with high frequency of walking, such as commuting vehicles in railway vehicles and in front of convenience store cash registers in general building materials, are severely worn and damaged.

The present invention has been made in view of such a technical background, and has sufficient adhesive strength with a floor, excellent dimensional stability, and does not swell or push up even in an environment where temperature changes are severe. An object of the present invention is to provide an olefin-based flooring that does not cause severe wear or damage even in a high-frequency floor.

In order to achieve the above object, the present invention provides the following means.

[1] A flooring composed of an olefin-based resin composition, a surface resin layer containing an olefin-based resin, and a printed layer laminated on the lower surface of the surface resin layer, and on the lower surface of the printed layer A base material layer containing an olefinic resin is laminated and integrated through an adhesive layer, the tensile modulus of the surface resin layer is set to 70 to 700 MPa, and the linear expansion coefficient of the base material layer is 5 ×. Olefin-based flooring characterized by being 10-5 × K-1 or less.

[2] The surface resin layer has a laminated structure of two or more layers, the outermost surface layer has a tensile modulus of elasticity of 750 MPa or more, and the tensile modulus of elasticity of the entire surface resin layer is 70 to 700 MPa. 2. The olefin-based flooring according to item 1 above.

[3] The olefin according to item 1 or 2 above, wherein the olefin-based flooring material has an abrasion loss of 1,000 revolutions or less by a JIS A 1453 abrasive paper method of 0.15 g or less, and has excellent scratch resistance. System flooring.

[4] Any one of the above items 1 to 3, wherein the base material layer has a laminated structure of two or more layers, and has a configuration in which a fabric made of glass fibers is laminated between at least one layer. The olefin-based flooring material according to item 1.

[5] The olefin-based flooring material according to any one of items 1 to 4, wherein the olefin-based flooring material has a flexural modulus of 200 MPa or less and a residual dent rate of 8.0% or less. .

[6] A fiber layer is embedded in a lowermost layer of a base material layer having a laminated structure of two or more layers, and at least a part of the fiber layer is exposed on the lowermost surface of the lowermost layer of the base material layer. The olefin-based flooring according to any one of claims 1 to 5.

In the invention of [1], a flooring material comprising an olefinic resin composition, comprising a surface resin layer containing an olefinic resin, and a printing layer laminated on the lower surface of the surface resin layer, the printing A base material layer containing an olefinic resin is laminated and integrated on the lower surface of the layer through an adhesive layer, and the surface resin layer has a tensile elastic modulus of 70 to 700 MPa and the thermal stress of the surface resin layer is increased. Lowering the linear expansion coefficient of the base material layer to 5 × 10 −5 × K-1 or less to ensure the dimensional stability against temperature change of the base material layer, thereby preventing the occurrence of phenomena such as swelling and push-up Olefin-based flooring.

In the invention of [2], the surface resin layer has a laminated structure of two or more layers, and the tensile modulus of the outermost surface layer constituting the surface resin layer is 750 MPa or more. The olefin flooring does not cause severe wear or damage.

In the invention of [3], since the abrasion loss of 1,000 revolutions by the JIS A 1453 abrasive paper method of the olefin-based flooring material is 0.15 g or less, there is no damage due to abrasion, and it has excellent scratch resistance. Therefore, it becomes an olefin-based flooring that can be sufficiently used even on a floor with a high frequency of walking such as a commuter vehicle in a railway vehicle and a cash register at a convenience store in a general building material.

In the invention of [4], the base material layer has a structure in which two or more layers are laminated, and a fabric made of glass fibers is laminated between at least one layer. It becomes a base layer excellent in stability, and can be an olefin-based flooring in which the occurrence of phenomena such as swelling and push-up is further prevented.

In the invention of [5], since the flexural modulus of the olefin-based flooring material is 200 MPa or less and the residual dent rate is 8.0% or less, the workability of the flooring material is good, and wear resistance, heel, etc. It can be set as the olefin type flooring material excellent in residual dent resistance.

In the invention of [6], a fiber layer is embedded in the lowermost layer of the base material layer having the laminated structure of two or more layers, and at least a part of the fiber layer is exposed on the lowermost surface of the lowermost layer of the base material layer. Therefore, the adhesive strength with the floor can be increased by the anchor effect of the fiber layer, and an olefin-based flooring can be obtained which does not have a problem due to insufficient adhesive strength with the floor such as swelling or pushing up during use.

An embodiment of an olefin-based flooring according to the present invention will be described with reference to the drawings. In the olefin-based flooring (1) of this embodiment, the printed layer (4) is laminated on the lower surface of the surface resin layer (2) containing the olefin-based resin, and the lower surface of the printed layer (4). In the laminated structure in which the base material layer (3) containing the olefin resin is laminated and integrated through the adhesive layer (5), the tensile elastic modulus of the surface resin layer (2) is set to 70 to 700 MPa, The linear expansion coefficient of the base material layer (3) is 5 × 10 −5 × K−1 or less (see FIG. 1).

For example, in the case of a railway vehicle where the temperature changes rapidly, the linear expansion coefficient of the resin flooring material is very large compared to the linear expansion coefficient of the aluminum plate or the like, which is a floor panel. If the resin floor material is to be deformed more than a plate or the like and the periphery of the resin floor material is fixed with metal fittings or the like, thermal stress appears. It is considered that when the thermal stress exceeds the adhesive force between the resin floor material and the floor board or the weight of the resin floor material, the resin floor material swells, and a phenomenon such as swelling or push-up occurs. Thermal stress is approximated by the product of tensile modulus, linear expansion coefficient, and temperature change. To reduce thermal stress, the tensile modulus and linear expansion coefficient of resin flooring are You can lower it. However, the flooring of the present invention is composed of four layers of a surface resin layer, a printing layer, an adhesive layer, and a base material layer. If a material having a low tensile elastic modulus and a linear expansion coefficient is used for each layer, Although a flooring material with less stress can be obtained, the performance as a flooring material cannot be ensured. Therefore, the tensile elastic modulus of the surface resin layer among the four layers is limited to 70 to 700 MPa, and the linear expansion coefficient of the base material layer It was confirmed that the thermal stress was suppressed by setting the thickness to 5 × 10 −5 × K−1 or less, and the phenomenon of swelling and pushing up could be prevented.

Furthermore, when the tensile modulus of the surface resin layer (2) is limited to 70 to 700 MPa, damage caused by wear on floors with high walking frequency, such as commuting vehicles in rail cars and in front of convenience store cash registers in general building materials. It became clear that the flooring was frequently damaged by the tip of the umbrella and the heel of the woman. In order to solve this problem, the surface resin layer (2) has two or more layers, and the tensile modulus of elasticity of the entire surface resin layer is maintained at 70 to 700 MPa, while the surface resin layer (2) has the outermost layer. Confirming that the tensile modulus of the surface layer (6) is 750 MPa or more, there is no damage due to wear, it has excellent scratch resistance, and can prevent swelling and push-up phenomenon. The present invention has been reached.

In the present invention, the surface resin layer (2) contains an olefin resin. Thus, since the surface resin layer (2) contains the olefin resin, the flooring (1) is excellent in contamination resistance on the surface. However, since the tensile modulus of the surface resin layer is limited to 70 to 700 MPa, examples of the olefin resin include polypropylene, polyethylene, ethylene-vinyl acetate copolymer resin, ethylene-α olefin copolymer resin, and olefin. Although a thermoplastic elastomer etc. are mentioned, it becomes a structure always containing an elastomer resin.

In this invention, the surface resin layer (2) has a laminated structure of two or more layers, the outermost surface layer (6) of the surface resin layer has a tensile modulus of elasticity of 750 MPa or more, and the entire surface resin layer It is necessary to set the tensile elastic modulus at 70 to 700 MPa. For example, as shown in FIG. 4, the outermost surface layer (6), the intermediate layer (7), and the lower layer (8) have a three-layer structure, and PP (polypropylene) having a tensile elastic modulus of 750 MPa or more is used as the outermost surface layer (6). The surface resin layer (2) having a structure in which HSBR (hydrogenated styrene-butadiene-rubber) and PP (polypropylene) having a tensile modulus of elasticity of 750 MPa or less are used for the lower layer (8) is disposed in the intermediate layer (7). Can do. However, the tensile elastic modulus in all layers of the surface resin layer (2) is limited to 70 to 700 MPa.

By setting the tensile modulus of the outermost surface layer (6) to 750 MPa or more, it is possible to reduce the wear loss of 1,000 rotations to 0.15 g or less by the abrasive paper method of JIS A 1453, and to have excellent wear resistance. It becomes a system flooring (1). Further, in the scratch resistance test described later, the olefin-based flooring material (1) which exhibits excellent scratch resistance and is hardly scratched. If the tensile modulus of the outermost surface layer (6) is less than 750 MPa, damage or damage due to wear occurs.

In addition, if the tensile modulus of elasticity in all layers of the surface resin layer (2) is less than 70 MPa, the surface resin layer (2) becomes flexible and the dent amount increases, which is not preferable. Moreover, even if the tensile modulus of elasticity of the surface resin layer (2) exceeds 700 MPa, it is not preferable because thermal stress that causes swelling is increased. A more preferable tensile elastic modulus of the surface resin layer (2) is 100 to 500 MPa.

The thickness of the surface resin layer (2) is not particularly limited, but is preferably set to 100 to 1000 μm. When the thickness is 100 μm or more, sufficient wear resistance is obtained, and when the thickness is 1000 μm or less, the generation of valley warp of the flooring (1) can be effectively prevented.

Next, the printing layer (4) is laminated on the lower surface of the surface resin layer (2), and is not particularly limited, and is formed by a printing technique such as gravure printing, offset printing, screen printing, transfer printing, and ink jet printing. Is. The printing ink used for this printing is not particularly limited. For example, pigments, dyes, colorants, fillers, etc. are added to and mixed with synthetic resins such as acrylic resins, urethane resins, and polyester resins. Can be exemplified. Usually, those diluted with a solvent or the like are used.

Next, as an adhesive constituting the adhesive layer (5) on the lower surface of the printed layer (4), a carboxylic acid-modified propylene-1-butene copolymer resin and a carboxylic acid-modified propylene-ethylene-1- It contains butene copolymer resin, and the mass ratio of carboxylic acid modified propylene-1-butene copolymer resin / carboxylic acid modified propylene-ethylene-1-butene copolymer resin is in the range of 55/45 to 95/5. An olefin that is preferably used, and the printed layer (4) on the lower surface of the surface resin layer (2) and the base material layer (3) are bonded and integrated with sufficient adhesive strength, and does not peel off between the layers. It becomes a system flooring.

As the carboxylic acid-modified propylene-1-butene copolymer resin, a maleic acid-modified propylene-1-butene copolymer resin is preferably used. In this case, the printing layer (4) and the base material layer (3) are used. The adhesive strength can be further improved. The carboxylic acid-modified propylene-ethylene-1-butene copolymer resin is preferably a maleic acid-modified propylene-ethylene-1-butene copolymer resin. In this case, the printing layer (4) and The adhesive strength with the base material layer (3) can be further improved. Examples of the carboxylic acid used for the carboxylic acid modification include acrylic acid, methacrylic acid, fumaric acid, crotonic acid, itaconic acid, citraconic acid, maleic anhydride, citraconic anhydride, phthalic anhydride, and the like. It can be illustrated.

It is preferable that the application amount (weight per unit area) of the adhesive layer (5) is set to 1 to 10 g / m ² (solid content). When it is 1 g / m 2 or more, sufficient adhesive strength can be secured, and when it is 10 g / m 2 or less, light weight can be maintained. Especially, it is especially preferable that the application amount of the adhesive layer (5) is set to 2 to 5 g / m 2 (solid content). Moreover, the formation method of the said adhesive bond layer (5) is not specifically limited, For example, the printing method, the dry laminating method, the wet laminating method etc. are mentioned.

The base material layer (3) contains an olefin resin. The olefin-based resin is not particularly limited, and examples thereof include polypropylene, polyethylene, ethylene-vinyl acetate copolymer resin, ethylene-α olefin copolymer resin, and olefin-based thermoplastic elastomer. The linear expansion coefficient of the base material layer (3) is limited to 5 × 10 −5 × K−1 or less. If it exceeds 5 × 10 −5 × K−1, it is not preferable because thermal stress that causes swelling is increased. A more preferable linear expansion coefficient of the base material layer is 2 × 10 −5 × K−1 or less, and the linear expansion coefficient can be adjusted by adjusting the blending amount of a filler such as calcium carbonate.

Furthermore, as another form (refer FIG. 3), the base material layer (3) is made into the laminated structure of two or more layers, and the structure (glass fiber layer 3-3) which consists of a glass fiber is laminated | stacked between at least one layer. Can be mentioned. Glass fiber is a material that has a particularly small change with respect to heat, and can be made into a flooring material (1) having a low coefficient of linear expansion with a more stable behavior against heat by being laminated in the base material layer (3). The fabric made of glass fiber is not particularly limited, such as woven fabric, knitted fabric, and nonwoven fabric.

The base material layer (3) may have a single layer structure or a laminated structure in which a plurality of layers are laminated. It is preferable that a concealing resin layer (3-1) is provided at a position on the surface side of the base material layer (3), and such concealing resin layer (3-1) is provided on the back side of the printing layer (4). By disposing, the pattern, design, etc. of the printed layer (4) can be visually recognized clearly and with good contrast. As the concealing resin layer (3-1), for example, a concealing resin layer made of a composition in which a color pigment, an antioxidant, and an ultraviolet absorber are mixed in an olefin resin can be exemplified. It is not limited. (See Figures 2 and 3)

Moreover, in another embodiment (refer FIG. 2, 3), what was laminated | stacked in the state which the fiber layer impregnated to the said base material layer (3) as a fiber layer (3-2) can be mentioned. By exposing at least a part of the fibers of the fiber layer (3-2) to the back surface of the lowermost layer of the base material layer (3), the adhesive strength with the floor can be increased by the anchor effect of the fibers. The fiber layer (3-2) is not particularly limited, such as a woven fabric, a knitted fabric, a non-woven fabric, or a fiber type, but a polyester woven fabric is preferably used because of its price and ease of impregnation into the base material layer.

Although the thickness of the said base material layer (3) is not specifically limited, It is preferable to set to 1-5 mm. When it is 1 mm or more, dimensional stability can be obtained, and when it is 5 mm or less, the lightness as the flooring material (1) can be maintained and good handling properties can be secured.

In addition, in any of the surface resin layer (2), the base material layer (3) and the adhesive layer (5), an antioxidant, an ultraviolet absorber, a lubricant, a stabilizer, a light stabilizer, a flame retardant, and a colorant. In addition, various additives such as an antistatic agent and a filler may be appropriately contained.

The thickness of the olefin flooring (1) of the present invention is not particularly limited, but is usually 2 to 5 mm. Moreover, you may comprise as a tile-like flooring, and you may comprise as a sheet-like flooring (for example, elongate sheet | seat etc. of width about 600-2500 mm), It does not specifically limit.

Moreover, it is preferable that the bending elastic modulus of the olefin type flooring material (1) of the present invention is 200 MPa or less. When the flexural modulus exceeds 200 MPa, the flooring material becomes hard and the workability is lowered, which is not preferable. Furthermore, it is preferable that the residual dent rate of the olefin flooring (1) of the present invention is 8.0% or less. If the residual dent rate exceeds 8.0%, the heel mark can be visually confirmed, which is not preferable. Further, the flexural modulus of the flooring is preferably 150 MPa or less, and the residual dent rate is 6% or less.

The olefin flooring (1) according to the above configuration is manufactured, for example, as follows. First, a printing layer (4) is formed by printing a printing ink containing a synthetic resin on the lower surface of a surface resin layer (2) containing an olefin resin and having a tensile elastic modulus of 70 to 700 MPa. . As the printing ink, for example, an ink in which a pigment is added and mixed in a urethane resin is used.

Next, the mass of the carboxylic acid-modified propylene-1-butene copolymer resin / carboxylic acid-modified propylene-ethylene-1-butene copolymer resin is 55/45 to 95/5 on the lower surface of the printing layer (4). An adhesive layer (5) mixed in a specific range is applied. This adhesive layer (5) is usually diluted with an organic solvent such as toluene, methyl ethyl ketone, isopropyl alcohol, ethanol, xylene and applied in a solution state.

Next, a base material layer (3) having a linear expansion coefficient of 5 × 10−5 × K−1 or less containing an olefin-based resin is superposed on the coated surface of the adhesive layer (5) and laminated. Get the body. Usually, it is adhered by heating and pressing.

Thereafter, the laminate is heated and annealed. By applying such an annealing treatment, the distortion inherent in the floor material (1) can be sufficiently removed. The heating temperature is preferably set to 80 to 120 ° C. The heating time (annealing time) is preferably set to 2 to 48 hours.

In addition, the flooring (1) according to the present invention is not particularly limited to that manufactured by the above-described exemplary manufacturing method.

More specifically, a method for producing a flooring according to the present invention will be described. <Example 1> As shown in Table 1, 10 parts by weight of an amorphous propylene-ethylene copolymer (amorphous poly α-olefin resin) having a number average molecular weight of 6000, and styrene-ethylene having a number average molecular weight of 25,000. -55 parts by weight of butadiene-styrene copolymer resin (SEBS), 35 parts by weight of polypropylene, 300 parts by weight of calcium carbonate, 0.4 parts by weight of antioxidant (hindered phenol-based antioxidant), lubricant (phosphate ester type) The composition consisting of 1.2 parts by weight was kneaded with a Banbury mixer, and a substrate layer (3) having a thickness of 1.8 mm was prepared using a calendering machine. The linear expansion coefficient of the base material layer (3) was 4 × 10 −5 × K−1.

On the other hand, as the surface resin layer (2), the outermost surface layer (6) / intermediate layer (7) / lowermost layer (8) = polypropylene (PP) resin layer having a tensile modulus of 800 MPa / hydrogenated styrene-butadiene-rubber ( HSBR) 3 layer structure of polypropylene (PP) resin layer with tensile modulus of 550MPa (each layer has the same thickness), surface resin layer (2) with thickness of 600μm and tensile modulus of 600MPa is prepared Then, a predetermined pattern is printed on the back surface by gravure printing to form a printed layer (4). Further, an adhesive (maleic acid-modified propylene-1-butene copolymer resin / maleic acid-modified propylene- 3 g / m ^{2 of} ethylene-1-butene copolymer resin = 90/10) was applied to form an adhesive layer (5).

Next, the base material layer (3) was laminated and adhered to the surface resin layer (2) on which the adhesive layer (5) was formed, to obtain a flooring material having a thickness of 2.4 mm. The flooring material thus obtained had a flexural modulus of 100 MPa and a residual dent rate of 4.0%. Furthermore, various performance tests were conducted by the methods described later, and the evaluation results are shown in Table 3.

<Examples 2 to 5> Except for the composition, thickness and other conditions of each layer shown in Table 1, a flooring was obtained in the same manner as in Example 1, various performance tests were performed, and the evaluation results are shown. 3. In Examples 4 and 5, the concealing layer is laminated on the upper surface of the base material layer. In Examples 2 to 5, as a fiber layer, cold chill (polyester woven fabric, basis weight 40 g / m 2) was impregnated and laminated on the base material layer, and at least a part of the fiber was exposed on the bottom surface of the base material layer. The construction is such that the adhesive strength with the floor is increased. Furthermore, in Example 5, the nonwoven fabric (40 g / m2 of fabric weight) which consists of glass fiber is inserted in a base material layer, and a base material layer with a low linear expansion coefficient (linear expansion coefficient = 2 * 10-5 * K-1) is used. Yes.

<Comparative example 1> As surface resin layer (2), outermost surface layer (6) / intermediate layer (7) / lowermost layer (8) = polypropylene (PP) resin layer having a tensile modulus of 800 MPa / tensile modulus of 800 MPa A surface resin layer having a three-layer structure of polyethylene (PE) resin layer / polypropylene (PP) resin layer having a tensile elastic modulus of 800 MPa (each layer having the same thickness), a thickness of 600 μm, and a tensile elastic modulus of 800 MPa (2 Except for the above, a flooring was obtained in the same manner as in Example 1. Various performance tests were conducted and the results are shown in Table 3.

<Comparative Examples 2-6> Except having set it as the structure shown in Table 2 about conditions, such as a composition of each layer, thickness, a flooring was obtained like Example 1, various performance tests were performed, and the evaluation result is shown. 3.

<Comparative Example 7> As the surface resin layer (2), outermost surface layer (6) / intermediate layer (7) / lowermost layer (8) = polypropylene (PP) resin layer having a tensile modulus of 600 MPa / tensile modulus of 600 MPa A surface resin layer (2) having a three-layer structure of polyethylene (PE) resin layer / polypropylene (PP) resin layer having a tensile elastic modulus of 600 MPa (each layer having the same thickness) and having a thickness of 600 μm and a tensile elastic modulus of 600 MPa. Except for the above, a flooring was obtained in the same manner as in Example 1. Various performance tests were conducted and the results are shown in Table 3.

As can be seen from Tables 1 to 3, the flooring materials of Examples 1 to 5 within the specified ranges of the tensile modulus and the linear expansion coefficient of the surface resin layer are wear resistance, scratch resistance, contamination resistance, and dimensional stability. It was excellent in both workability and swelling prevention. On the other hand, in Comparative Examples 1, 2, and 4, which exceeded the specified range of the tensile elastic modulus, there was a problem in the swelling prevention property, and the bending elastic modulus was also large. Further, in Comparative Examples 3 and 5 that were below the specified range of the tensile modulus, the residual dent rate could not satisfy the standard. Further, Comparative Example 7 in which the tensile modulus of the outermost surface layer in the surface resin layer was less than 800 MPa could not satisfy the standards for wear resistance and scratch resistance. In addition, the method of the various performance tests with respect to each flooring obtained as mentioned above was performed as follows.

<Tensile modulus measurement method> Measured according to JIS K6251. The tensile speed was 100 mm / min.

<Method for measuring flexural modulus> Measured according to JISK7171. The test speed was 1.0 mm / min.

<Method of measuring linear expansion coefficient> A sample cut into a 10 cm square size was set in a TMA (thermomechanical analyzer) and measured by raising the temperature from 25 ° C to 80 ° C (5 ° C / min).

<Abrasion resistance test> According to the friction test method for building materials and building components according to JIS A1453, a wear wheel in which a predetermined abrasive paper is wound around the surface of each flooring material is used, and a taper wear tester is used. Rotated and measured for weight loss (g). Those with a weight loss of 0.15 g or less were rated as “」 ”, those with 0.15 to 0.30 g as“ ◯ ”, and those exceeding 0.30 g as“ x ”.

<Scratch resistance test> A sample cut into a 10 cm square size was adhered to a smooth aluminum plate with a rubber adhesive (in an atmosphere at 23 ° C.), and the four sides of the sample were fixed with metal fittings and allowed to stand for 24 hours. Using a hardness tester, apply a load of 1,000 g with 800-th sandpaper and rub the surface of the flooring at a speed of 50 mm / min. , “○” indicates that the flaw is visible, and “×” indicates that the flaw is clearly visible.

<Contamination resistance test> In accordance with the contamination test of vinyl flooring according to JIS A5705, 2 mL of contamination material is dropped on the surface of each flooring, left to stand for 24 hours, and washed with water containing a neutral detergent. Further, after washing with alcohol, wiped off with gauze, allowed to stand for 1 hour, and visually observed changes in color, gloss and swelling of the dripping part. Those that did not change by observation were marked “◎”, and those that changed at least one were marked “x”.

<Dimensional stability test> According to the length change test by heating of vinyl-based flooring according to JIS A5705, each flooring was heated at 80 ° C for 6 hours, then left indoors for 1 hour, and length before heating. The rate of change with respect to was measured. Those with a rate of change in length of less than 1.0% were marked with “◎”, those with 1.0-1.5% were marked with “◯”, and those with a length change rate exceeding 1.5% were marked with “x”.

<Workability test> Excellent flexibility and construction workability, and familiarity with the groundwork (construction floor) is "◎", flexibility is good and construction workability is good, familiarity with the groundwork Good ones were marked with “◯”, and those with poor flexibility, poor workability, and poor familiarity with the ground were given “x”.

<Swelling prevention test> A sample cut into a 40 cm square size was bonded to a smooth aluminum plate with a rubber adhesive (in an atmosphere of 23 ° C), and the four sides of the sample were fixed with metal fittings and allowed to stand for 24 hours. 50 ° C. and 60 ° C. were heated in order for 2 hours, and those that did not swell after 6 hours were indicated as “◎”, and those that swelled were indicated as “x”.

<Residual dent rate measuring method> Measured according to JIS A 1454. Those having a residual dent ratio of 3% or less were evaluated as “」 ”, those having 3-8% as“ ◯ ”, and those exceeding 8% as“ X ”.

Furthermore, the flooring material of Example 1 was subjected to an NBS combustion test and a flameproof test (vehicle material combustion test). These results are shown in Table 4.

The NBS combustion test method is a method in which a sample is placed vertically in a closed smoke box, and burner flame is applied to the smoke generated in the smoke box while radiant heat is applied from the heater in front of the sample. On the other hand, the light transmittance is measured by a phototube, and the smoke density (Ds) is calculated from the light transmittance (T) based on the following calculation formula.

Ds = 132 log (100 / T) A Ds value and a maximum Ds value of 4 minutes after the start of the test were determined. Further, the gas in the smoke box was collected in a Teflon (registered trademark) bag, and the generated gas was analyzed.

As can be seen from Table 4, it was confirmed that the flooring of the present invention has low fuming property and hardly generates toxic gas.

Not only vehicles, but also buildings, condominiums, houses, commercial facilities, and other buildings that are used in environments with severe temperature changes, and floors that are not frequently worn or damaged even when the floor is frequently walked It can be used sufficiently as a material.

It is explanatory drawing which shows the flooring which concerns on one Embodiment of this invention. Example 1 It is explanatory drawing which shows the flooring which concerns on another embodiment of this invention. (Substrate layer portion of Example 4) It is explanatory drawing which shows the flooring which concerns on another embodiment of this invention. (Substrate layer portion of Example 5) It is explanatory drawing which expands and shows a part of surface resin layer (2) of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Olefin type flooring 2 Surface resin layer 3 Base material layer 3-1 Concealment layer 3-2 Fiber layer 3-3 Glass fiber layer 4 Printing layer 5 Adhesive layer 6 Outermost surface layer in surface resin layer 7 Middle in surface resin layer Layer 8 Lowermost layer in the surface resin layer

Claims (6)

A flooring material comprising an olefinic resin composition, comprising a surface resin layer containing an olefinic resin, a printed layer laminated on the lower surface of the surface resin layer, and an adhesive layer on the lower surface of the printed layer A base material layer containing an olefin-based resin is laminated and integrated, and a tensile elastic modulus of the surface resin layer is set to 70 to 700 MPa, and a linear expansion coefficient of the base material layer is set to 5 × 10 −5. Olefin-based flooring characterized by being not more than × K-1. The surface resin layer has a laminated structure of two or more layers, the tensile modulus of the outermost surface layer is 750 MPa or more, and the tensile modulus of elasticity in all layers of the surface resin layer is 70 to 700 MPa. The olefin flooring according to claim 1. The olefinic flooring according to claim 1 or 2, wherein the olefinic flooring material has an abrasion loss of 1,000 revolutions or less by a JIS A 1453 abrasive paper method of 0.15 g or less and has excellent scratch resistance. Wood. The said base material layer is equipped with the laminated structure of two or more layers, and consists of the structure by which the cloth which consists of glass fiber is laminated | stacked between the at least one layer, The any one of Claims 1-3 characterized by the above-mentioned. The olefin-based flooring described in 1. The olefin flooring according to any one of claims 1 to 4, wherein the olefin flooring has a flexural modulus of 200 MPa or less and a residual dent ratio of 8.0% or less. A fiber layer is embedded in a lowermost layer of a base material layer having a laminated structure of two or more layers, and at least a part of the fiber layer is exposed on the back surface of the lowermost layer of the base material layer. Item 6. The olefin-based flooring material according to any one of Items 1 to 5.