JP5177761B2 - Olefin flooring - Google Patents

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.

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

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

[1] A flooring composed of an olefin resin composition, wherein a surface resin layer containing an olefin resin and a printing layer are laminated on the lower surface of the surface resin layer, and on the lower surface of the printing layer A base material layer containing an olefin 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 a scale-like inorganic substance is added to the base material layer. And the linear expansion coefficient of the said base material layer was made into 5 * 10 <^-5> * K <^-1> or less, The olefin type flooring characterized by the above-mentioned.

[2] The base material layer has a two-layer structure of a first base material layer close to the print layer and a second base material layer laminated on the first base material layer. The linear expansion coefficient is 5 × 10 ⁻⁵ × K ⁻¹ or less and the tensile elastic modulus is 100 to 600 MPa, and the second base material layer has a linear expansion coefficient of 10 × 10 ⁻⁵ × K. The olefin-based flooring according to the preceding item ¹ , comprising a layer having a tensile elastic modulus of 100 to 200 MPa, ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ .

[3] The base material layer includes a first base material layer close to the print layer, a second base material layer stacked on the first base material layer, and a third base material layer stacked on the second base material layer. The first base material layer has a linear expansion coefficient of 10 × 10 ⁻⁵ × K ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ and a tensile elastic modulus of 100 to 200 MPa. The base material layer has a scale-like inorganic substance added thereto, the linear expansion coefficient is 5 × 10 ⁻⁵ × K ⁻¹ or less, the tensile elastic modulus is 100 to 600 MPa, and the third base material layer has a linear expansion coefficient of 10 The olefin-based flooring according to item 1 above, comprising a layer of × 10 ⁻⁵ × K ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ and a tensile modulus of 100 to 200 MPa.

[4] The olefin system according to any one of items 1 to 3, wherein an addition amount of the scale-like inorganic substance is added in an amount of 1 to 20 parts by weight with respect to 100 parts by weight of the resin weight of the base material layer. Flooring.

[5] The olefin-based flooring according to any one of items 1 to 4, wherein the scale-like inorganic substance is glass and / or talc scale-like inorganic substance.

[6] The olefin-based flooring according to any one of items 1 to 5, wherein the scale-like inorganic material has a thickness of 10 μm or less and a major axis of 100 to 600 μm.

[7] The olefin flooring according to any one of items 1 to 6 above, wherein the olefin flooring has a flexural modulus of 200 MPa or less and a residual dent ratio of 8.0% or less. .

[8] Any one of items 1 to 7 above, wherein a fiber layer is embedded in the lowermost layer of the base material layer, and at least a part of the fiber layer is exposed on the back surface of the lowermost layer of the base material layer. The olefin-based flooring material according to Item.

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 olefin resin is laminated and integrated on the lower surface of the layer via an adhesive layer, the tensile modulus of the surface resin layer is set to 70 to 700 MPa, and the base material layer has a scaly shape. By adding the inorganic substance and limiting the linear expansion coefficient of the base material layer to 5 × 10 ⁻⁵ × K ⁻¹ or less, the thermal stress that causes the swelling is reduced, and the phenomenon of swelling and push-up occurs. The olefin-based flooring can be prevented.

In the invention of [2], the base material layer has a two-layer structure of a first base material layer close to the print layer and a second base material layer laminated on the first base material layer, and the first base material layer Has a linear expansion coefficient of 5 × 10 ⁻⁵ × K ⁻¹ or less with a scale-like inorganic substance added, a tensile elastic modulus of 100 to 600 MPa, and the second base material layer has a linear expansion coefficient of 10 × 10 6. ⁻⁵ × K ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ , and a tensile elastic modulus of 100 to 200 MPa. Therefore, the first base material layer has a smaller linear expansion coefficient than the second base material layer. Since the second base material layer is prevented from expanding and extending from the side surface of the first base material layer, the phenomenon of swelling, pushing up and warping can be prevented. Furthermore, since the layer to which the scaly inorganic substance is added is limited to the first base material layer, the amount of the scaly inorganic substance used can be reduced, which is economical.

In the invention of [3], the base material layer is a first base material layer close to the print layer, a second base material layer laminated on the first base material layer, and a third base material laminated on the second base material layer. The first base material layer has a linear expansion coefficient of 10 × 10 ⁻⁵ × K ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ and a tensile elastic modulus of 100 to 200 MPa. The second base material layer has a linear expansion coefficient of 5 × 10 ⁻⁵ × K ⁻¹ or less and a tensile elastic modulus of 100 to 600 MPa by adding a scale-like inorganic substance, and the third base material layer has a linear expansion coefficient. Since the rate is 10 × 10 ⁻⁵ × K ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ and the tensile elastic modulus is 100 to 200 MPa, linear expansion occurs from the first base material layer and the third base material layer. Since the second base material layer having a low rate prevents the first base material layer and the third base material layer from expanding and extending from both sides of the laminated surface, the second base material layer is swollen or pushed up, warped. Phenomenon can be prevented. Furthermore, since the layer to which the scaly inorganic substance is added is limited to the second base material layer, the amount of the scaly inorganic substance used can be reduced, which is economical.

In the invention of [4], since the added amount of the scale-like inorganic substance is added in an amount of 1 to 20 parts by weight with respect to 100 parts by weight of the resin weight of the base material layer, the scale-like inorganic substance is oriented in the plane direction and is based on The linear expansion coefficient of the material layer can be reduced to 5 × 10 ⁻⁵ × K ⁻¹ or less, and it becomes a base material layer having excellent dimensional stability against temperature change, thereby preventing the occurrence of phenomena such as swelling and push-up. It can be an olefin-based flooring. Moreover, not a hard and brittle base material layer but a flexible olefin-based flooring can be obtained.

In the invention of [5], since the scale-like inorganic substance is a glass-like and / or talc scale-like inorganic substance, the linear expansion coefficient of the base material layer may be 5 × 10 ⁻⁵ × K ⁻¹ or less. The substrate layer can be excellent in dimensional stability against temperature changes.

In the invention of [6], since the scale-like inorganic material has a thickness of 10 μm or less and a major axis of 100 to 600 μm, it can be easily kneaded into the resin of the base material layer, and the linear expansion coefficient of the base material layer can be stably increased. The base layer can be secured to 5 × 10 ⁻⁵ × K ⁻¹ or less and has excellent dimensional stability against temperature change.

In the invention of [7], 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 [8], since the fiber layer is embedded in the lowermost layer of the base material layer and at least a part of the fiber layer is exposed on the lowermost back surface of the base material layer, the floor is formed by the anchor effect of the fiber layer. The olefin-based flooring can be made free from problems 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, A scale-like inorganic substance is added to the base material layer (3), and 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. 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 will swell, and it is considered that phenomena such as swelling and push-up occur. . 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 comprises 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 low linear expansion coefficient is used for each layer, the thermal stress is small. Although a flooring material can be obtained, the performance as a flooring material cannot be ensured. Therefore, the tensile elastic modulus of the surface resin layer is limited to 70 to 700 MPa, and a scale-like inorganic substance is added to the base material layer. By setting the linear expansion coefficient to 5 × 10 −5 × K−1 or less, it is possible to suppress thermal stress and prevent swelling and push-up phenomenon.

Furthermore, in FIG. 2, the said base material layer (3) is laminated | stacked on the 1st base material layer (3-1) close | similar to the said printing layer (4), and a 1st base material layer (3-1). It consists of a two-layer structure of two base material layers (3-2), and the first base material layer (3-1) has a linear expansion coefficient of 5 × 10 ⁻⁵ × K ⁻¹ by adding a scale-like inorganic substance. Hereinafter, the tensile elastic modulus is 100 to 600 MPa, and the second base material layer (3-2) has a linear expansion coefficient of 10 × 10 ⁻⁵ × K ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ , Since the elastic layer is a layer having a modulus of 100 to 200 MPa, the first base material layer (3-1) has a smaller linear expansion coefficient than the second base material layer (3-2), so the second base material layer (3- Since 2) prevents the expansion and expansion, it is possible to prevent the phenomenon of swelling, pushing up and warping.

Moreover, in FIG. 3, the said base material layer (3) is laminated | stacked on the 1st base material layer (3-2) close | similar to the said printing layer (4), and a 1st base material layer (3-2). It consists of a three-layer structure of two base material layers (3-1) and a third base material layer (3-3) laminated on the second base material layer (3-1), and the first base material layer (3- 2) The linear expansion coefficient is 10 × 10 ⁻⁵ × K ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ , the tensile elastic modulus is 100 to 200 MPa, and the second base material layer (3-1) is A scale-like inorganic substance is added, the linear expansion coefficient is 5 × 10 ⁻⁵ × K ⁻¹ or less, the tensile elastic modulus is 100 to 600 MPa, and the third base material layer (3-3) has a linear expansion coefficient of 10 ^{× 10 -5 × K -1 ~12 ×} 10 -5 × K -1, because a layer which has a tensile modulus 100 to 200 MPa, the first base layer (3-2) and the third base material layer ( 3-3) Stranded wire The second base material layer (3-1) having a small tension rate prevents the first base material layer (3-2) and the third base material layer (3-3) from expanding and extending from both sides of the laminated surface. Therefore, the phenomenon of swelling, pushing up and warping can be prevented.

The surface resin layer (2) contains an olefin resin. Thus, since the surface resin layer (2) contains the olefin resin, the flooring (1) has excellent wear resistance and 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. The surface resin layer (2) may have a single layer structure or a laminated structure in which a plurality of layers are laminated. For example, the surface layer, the intermediate layer, and the lower layer have a three-layer structure, PP (polypropylene) excellent in wear and chemical resistance performance is disposed on the surface layer and the lower layer, and HSBR (hydrogenated styrene-butadiene-rubber) is used for the intermediate layer. A surface resin layer (2) having a structure can be mentioned. However, the tensile elastic modulus of the surface resin layer (2) is limited to 70 to 700 MPa. If the tensile modulus of the surface resin layer is less than 70 MPa, the surface resin layer becomes flexible and the dent amount increases, which is not preferable. Further, even if the tensile elastic modulus of the surface resin layer exceeds 700 MPa, it is not preferable because the thermal stress that causes swelling is increased. The tensile modulus of elasticity of the surface resin layer is more preferably 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). Sufficient adhesive strength can be ensured by being 1 g / m ² or more, and lightweight can be maintained by being 10 g / m ² or less. 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 said base material layer (3) contains an olefin resin and a scale-like inorganic substance. 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. In addition, it is a well-known technique to obtain dimensional stability by mixing an inorganic substance in a resin, but in the present invention, in particular, a scaly shape having orientation in the plane direction and having a large influence on the linear expansion coefficient in the plane direction. Inorganic substances are preferred. In this invention, the linear expansion coefficient of this base material layer (3) is restrict ^| limited to 5 * 10 <^-5> * K <^-1> or less. If it exceeds 5 × 10 ⁻⁵ × K ⁻¹ , the thermal stress that causes swelling is increased, which is not preferable. More preferably, the 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 fillers such as scale-like inorganic substances and calcium carbonate. it can.

Further, the base material layer (3) may have a single layer structure or a laminated structure in which a plurality of layers are laminated. For example, in FIG. 2, the base material layer (3) is laminated on the first base material layer (3-1) close to the print layer (4) and the first base material layer (3-1). It consists of a two-layer structure of a material layer (3-2), and the first base material layer (3-1) has a linear expansion coefficient of 5 × 10 ⁻⁵ × K ⁻¹ or less by adding a scaly inorganic substance, The tensile elastic modulus is 100 to 600 MPa, and the second base material layer (3-2) has a linear expansion coefficient of 10 × 10 ⁻⁵ × K ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ and a tensile elastic modulus. Since the layers of 100 to 200 MPa are laminated and integrated, the first base material layer (3-1) has a smaller linear expansion coefficient than the second base material layer (3-2), and the second base material layer (3 -2) is prevented from expanding and extending by the first base material layer (3-1), so that the phenomenon of swelling, pushing up and warping can be prevented. When the linear expansion coefficient of the first base material layer (3-1) exceeds 5 × 10 ⁻⁵ × K ⁻¹ , the linear expansion coefficient of the second base material layer (3-2) is 10 × 10 ⁻⁵ × K. ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ , and the tensile modulus of elasticity is set to 100 to 200 MPa, the linear expansion coefficient of the first base material layer (3-1) and the second base material layer (3-2) Since the difference becomes small, the force that the first base material layer (3-1) prevents the second base material layer (3-2) from expanding becomes weak and warpage occurs, which is not preferable. The linear expansion coefficient of the layer (3-1) exceeds 5 × 10 ⁻⁵ × K ⁻¹ and the linear expansion coefficient of the second base material layer (3-2) exceeds 12 × 10 ⁻⁵ × K ⁻¹ . This is not preferable because the thermal stress that causes swelling is increased.

For example, in FIG. 3, the base material layer (3) is laminated on the first base material layer (3-2) close to the print layer (4) and the first base material layer (3-2). It consists of a three-layer structure of two base material layers (3-1) and a third base material layer (3-3) laminated on the second base material layer (3-1), and the first base material layer (3- 2) The linear expansion coefficient is 10 × 10 ⁻⁵ × K ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ , the tensile elastic modulus is 100 to 200 MPa, and the second base material layer (3-1) is A scale-like inorganic substance is added, the linear expansion coefficient is 5 × 10 ⁻⁵ × K ⁻¹ or less, the tensile elastic modulus is 100 to 600 MPa, and the third base material layer (3-3) has a linear expansion coefficient of 10 X10 ⁻⁵ × K ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ , a layer having a tensile elastic modulus of 100 to 200 MPa is laminated and integrated, so the second base material layer (3-1) is the first Base material layer 3-2) and the third base material layer (3-3) have a smaller linear expansion coefficient, and the first base material layer (3-2) and the third base material layer (3-3) expand and expand. Since it interferes from both sides of the laminated surface, it is possible to prevent the phenomenon of swelling, pushing up and warping. When the linear expansion coefficient of the second base material layer (3-1) exceeds 5 × 10 ⁻⁵ × K ⁻¹ , the first base material layer (3-2) and the third base material layer (3-3) Even if the linear expansion coefficient is 10 × 10 ⁻⁵ × K ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ and the tensile elastic modulus is 100 to 200 MPa, the second base material layer (3-1) and the first base material layer are used. Since the difference in coefficient of linear expansion between (3-2) and the third base material layer (3-3) becomes small, the first base material layer (3-2) and the third base material layer (3-3) Since the force which the 2nd base material layer (3-1) prevents expanding becomes weak and curvature generate | occur | produces, it is not preferable, and the linear expansion coefficient of the 2nd base material layer (3-1) is 5 * 10 <^-5> *. When K- ¹ is exceeded and the linear expansion coefficient between the first base material layer (3-2) and the third base material layer (3-3) exceeds 12 × 10 ⁻⁵ × K ⁻¹ , Since the thermal stress which becomes becomes large, it is not preferable.

    In addition, when adding scale-like inorganic substance, in order to improve adhesiveness with olefin resin, it is preferable to perform the surface treatment of scale-like inorganic substance with aminosilane. What is necessary is just to dry for 5 to 10 minutes at the temperature of 110-120 degreeC after immersing a scale-like inorganic substance in an aminosilane solution and taking out.

The scale-like inorganic substance is preferably glass and / or talc scale-like inorganic substance. Of these, scaly glass is preferable because it has a particularly small linear expansion coefficient. Moreover, it is preferable that 1-20 weight part of addition amounts of the said scale-like inorganic substance are added with respect to 100 weight part of resin weights of a base material layer. When the amount is less than 1 part by weight, the linear expansion coefficient of the base material layer (3) is increased, which is not preferable. Moreover, when the addition amount exceeds 20 parts by weight, the base material layer (3) becomes hard and brittle and cannot be used as a flooring material.

Moreover, it is preferable that the thickness as a shape of a scale-like inorganic substance is 10 micrometers or less, and a major axis is 100-600 micrometers. If the thickness exceeds 10 μm, the ratio between the diameter and the thickness (aspect ratio) becomes small, and the desired linear expansion coefficient cannot be obtained. In addition, when the major axis of the scale-like inorganic substance is less than 100 μm, the linear expansion coefficient of the base material layer (3) exceeds 5 × 10 ⁻⁵ × K ^−1, and when it exceeds 600 μm, it tends to be crushed during kneading with the resin. .

Furthermore, as another form (refer FIG. 5), the base material layer (3) is made into the laminated structure of two or more layers, and the structure (glass fiber layer 3-6) which consists of a glass fiber is laminated | stacked between at least 1 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, a laminated structure in which a plurality of layers are laminated, or a position on the surface side of the base material layer (3). It is preferable that a concealing resin layer (3-4) is provided, and by arranging such a concealing resin layer (3-4) on the back side of the printing layer (4), the pattern of the printing layer (4), Designs and the like can be visually recognized with high contrast. Examples of the concealing resin layer (3-4) include 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. It is not limited. (See Figs. 4 and 5)

Moreover, in another embodiment (refer FIG. 4, 5), what was laminated | stacked in the state which the fiber layer impregnated to the said base material layer (3) as a fiber layer (3-5) can be mentioned. By exposing at least a part of the fibers of the fiber layer (3-5) to the bottom 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 (3-5) is not particularly limited, such as a woven fabric, a knitted fabric, a nonwoven 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 is 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. Furthermore, the thickness of the base material layer (3) is not particularly limited, but is preferably set to 60 to 85% of the total thickness of the flooring (1), and is set to 65 to 75%. Further preferred. In FIG. 2, the thickness of the first base material layer is preferably set to 10 to 25% of the total thickness of the flooring (1), more preferably set to 15 to 20%. . The thickness of the second base material layer is preferably set to 50 to 60% of the total thickness of the flooring (1), and more preferably set to 53 to 58%. In FIG. 3, the thickness of the first base material layer is preferably set to 5% or less of the total thickness of the flooring material (1), more preferably set to 3% or less. The thickness of the second base material layer is preferably set to 10 to 20% of the total thickness of the flooring (1), and more preferably set to 15 to 17%. The thickness of the third base material layer is preferably set to 50 to 60% of the total thickness of the flooring material (1), and more preferably set to 51 to 53%. By setting in this way, it is possible to effectively prevent the floor material (1) from being swollen or pushed up and warped.

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 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 160000. -55 parts by weight of butadiene-styrene copolymer resin (SEBS), 35 parts by weight of polypropylene, 5 parts by weight of scaly glass (thickness 5 μm, major axis 300 μm), 200 parts by weight of calcium carbonate, antioxidant (hindered phenol type) A composition comprising 0.4 parts by weight of an antioxidant and 1.2 parts by weight of a lubricant (phosphate ester type) is kneaded with a Banbury mixer, and a substrate layer having a thickness of 1.8 mm using a calendar molding machine (3) was created. The linear expansion coefficient of the base material layer (3) was 2 × 10 ⁻⁵ × K ⁻¹ .

On the other hand, as the surface resin layer (2), a three-layer structure of outermost layer / intermediate layer / lowermost layer = polypropylene (PP) resin layer / hydrogenated styrene-butadiene-rubber (HSBR) resin layer / polypropylene (PP) resin layer ( Each layer has the same thickness), a surface resin layer (2) having a thickness of 600 μm and a tensile modulus of 600 MPa is prepared, and a predetermined pattern is printed on the back surface by gravure printing to form a printed layer (4) and, further on the lower surface thereof, the adhesive (maleic acid-modified propylene-1-butene copolymer resin / maleic acid-modified propylene - ethylene-1-butene copolymer resin = 90/10) and 3 g / ^{m 2} coated adhesive The agent layer (5) was formed.

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.

<Example 2> In the same manner as in Example 1, a base material layer (3-1) in Fig. 2 having a thickness of 0.5 mm was prepared. The linear expansion coefficient of the base material layer (3-1) was 2 × 10 ⁻⁵ × K ⁻¹ , and the tensile elastic modulus was 400 MPa. Next, the substrate layer (3-1) was prepared in the same manner as the substrate layer (3-1) except that it was prepared without adding scaly glass (thickness 5 μm, major axis 300 μm). A base material layer (3-2) in FIG. 2 having a thickness of 1.3 mm was prepared. The linear expansion coefficient of the base material layer (3-2) was 12 × 10 ⁻⁵ × K ⁻¹ , and the tensile elastic modulus was 150 MPa. Next, the base material layer (3-1) and the base material layer (3-2) were laminated using a calendar molding machine to obtain the base material layer (3) in FIG. 2 having a thickness of 1.8 mm.

On the other hand, the surface resin layer (2), the printing layer (4), and the adhesive layer (5) were formed in the same manner as in Example 1. Next, the base material layer (3) is laminated and bonded to the surface resin layer (2) on which the adhesive layer (5) is formed so that the base material layer (3-1) side is the surface resin layer (2) side. Thus, a flooring material having a thickness of 2.4 mm was obtained. The flooring material thus obtained had a flexural modulus of 80 MPa and a residual dent rate of 6.0%. Furthermore, various performance tests were conducted by the methods described later, and the evaluation results are shown in Table 3.

<Example 3> In the same manner as in Example 1, a base material layer (3-1) in Fig. 3 having a thickness of 0.5 mm was prepared. The linear expansion coefficient of the base material layer (3-1) was 2 × 10 ⁻⁵ × K ⁻¹ , and the tensile elastic modulus was 400 MPa. Next, the substrate layer (3-1) was prepared in the same manner as the substrate layer (3-1) except that it was prepared without adding scaly glass (thickness 5 μm, major axis 300 μm). A base material layer (3-2) in FIG. 3 having a thickness of 0.3 mm and a base material layer (3-3) in FIG. 3 having a thickness of 1.0 mm were respectively prepared. Both the base material layer (3-2) and the base material layer (3-3) had a linear expansion coefficient of 12 × 10 ⁻⁵ × K ⁻¹ and a tensile elastic modulus of 150 MPa. Next, the base material layer (3-2), the base material layer (3-1), and the base material layer (3-3) are stacked in this stacking order using a calendering machine, and the thickness is 1.8 mm. The base material layer (3) was obtained.

On the other hand, the surface resin layer (2), the printing layer (4), and the adhesive layer (5) were formed in the same manner as in Example 1. Next, the base material layer (3) is laminated and bonded to the surface resin layer (2) on which the adhesive layer (5) is formed so that the base material layer (3-1) side is the surface resin layer (2) side. Thus, a flooring material having a thickness of 2.4 mm was obtained. The flooring material thus obtained had a flexural modulus of 70 MPa and a residual dent rate of 6.0%. Furthermore, various performance tests were conducted by the methods described later, and the evaluation results are shown in Table 3.

<Examples 4-8> Except having set it as the structure shown in Table 1 about conditions, such as a composition of each layer, thickness, a flooring is obtained like Example 1, various performance tests are performed, and the evaluation result is shown. 3. In Examples 6 and 7, the concealing layer is laminated on the upper surface of the base material layer. Further, in Examples 4, 5, 6, and 8, as a fiber layer, cold chill (polyester woven fabric, basis weight 40 g / m ² ) was impregnated and laminated, and at least a part of the fibers was the most of the base layer. It was exposed to the lower surface of the lower layer to increase the adhesive strength with the floor. Furthermore, in Example 8, the base material layer is a nonwoven fabric made of glass fibers (weight per unit area: 40 g / m
² ) is inserted to form a base material layer having a low linear expansion coefficient (linear expansion coefficient = 1 × 10 ⁻⁵ × K ⁻¹ ).

As the base material layer (3) in <Comparative Example 1> Example 1, scaly glass (thickness 5 [mu] m, diameter 300 [mu] m) 0.5 parts by weight and coefficient of linear expansion and 8 × ^{10 -5} × ^{K -1} Except for this, 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 Example 2> A flooring material in the same manner as in Example 2 except that the base material layer (3-1) in Example 2 is 0.5 parts by weight of scaly glass (thickness 5 μm, major axis 300 μm). Got. The linear expansion coefficient of the base material layer (3-1) was 8 × 10 ⁻⁵ × K ⁻¹ , and the tensile elastic modulus was 200 MPa. Various performance tests were conducted and the results are shown in Table 3.

<Comparative Example 3> A flooring material in the same manner as in Example 3 except that the base material layer (3-1) in Example 3 is 0.5 parts by weight of scaly glass (thickness 5 μm, major axis 300 μm). Got. The linear expansion coefficient of the base material layer (3-1) was 8 × 10 ⁻⁵ × K ⁻¹ , and the tensile elastic modulus was 200 MPa. Various performance tests were conducted and the results are shown in Table 3.

<Comparative Examples 4-7> Except having set it as the structure shown in Table 2 about conditions, such as a composition of each layer, thickness, flooring was obtained like Example 1, various performance tests were done, and the evaluation result is shown. 3.

As can be seen from Tables 1 to 3, the flooring materials of Examples 1 to 8 within the specified ranges of the tensile modulus and the linear expansion coefficient of the surface resin layer are swell prevention, abrasion resistance, contamination resistance, and dimensional stability. And workability were excellent. On the other hand, in Comparative Examples 6 and 7, 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 Example 5 where the tensile modulus was below the specified range, the residual dent rate could not satisfy the standard. In addition, the method of the various performance tests with respect to each flooring obtained as mentioned above was performed as follows.

<Measurement method of tensile modulus> Measured according to JIS K6251. The pulling 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).

<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 ”.

<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”.

<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 0.25 g or less were rated as “◎”, those with 0.25 to 0.30 g were rated as “◯”, and those exceeding 0.30 g were marked as “x”.

<Contamination resistance test> According to the JIS A5705 vinyl flooring contamination test, 2 mL of the contamination material was 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”.

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 for vehicles, but also for buildings such as buildings, condominiums, houses, commercial facilities, etc., it can be sufficiently used as a flooring material used in an environment where the temperature changes rapidly.

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 one Embodiment of this invention. (Example 2) It is explanatory drawing which shows the flooring which concerns on one Embodiment of this invention. (Example 3) It is explanatory drawing which shows the flooring which concerns on another embodiment of this invention. (Substrate layer portion of Example 6) It is explanatory drawing which shows the flooring which concerns on another embodiment of this invention. (Substrate layer portion of Example 8)

DESCRIPTION OF SYMBOLS 1 ... Olefin type flooring 2 ... Surface resin layer 3 ... Base material layer 3-1 ... Inorganic substance addition base material layer 3-2 ... Inorganic substance non-addition base material layer 3-3 ...・ Inorganic non-added base material layer 3-4: Hiding layer 3-5 ... Fiber layer 3-6 ... Glass fiber layer 4 ... Printing layer 5 ... Adhesive layer

Claims (7)

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 the base material layer is a first base close to the printing layer. It consists of a two-layer structure of a material layer and a second base material layer laminated on the first base material layer. The first base material layer has a linear expansion coefficient of 5 × 10 ⁻⁵ × by adding a scale-like inorganic substance. K- ¹ or less, the tensile elastic modulus is 100 to 600 MPa, and the second base material layer has a linear expansion coefficient of 10 × 10 ⁻⁵ × K ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ and a tensile elastic modulus. 100~200MPa and was characterized by comprising a layer and to Luo olefin-based flooring. 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 the base material layer is a first base close to the printing layer. It consists of a three-layer structure of a material layer, a second base material layer laminated on the first base material layer, and a third base material layer laminated on the second base material layer, and the first base material layer has a linear expansion coefficient. 10 × 10 ⁻⁵ × K ^{−1 to} 12 × 10 ⁻⁵ × K ⁻¹ , the tensile elastic modulus is 100 to 200 MPa, and the second base material layer has a linear expansion coefficient by adding a scale-like inorganic substance. 5 × ^{10 -5} × ^{K -1} or less, a tensile modulus of elasticity and 100～600MPa, the third base material The coefficient of linear expansion of ^{10 × 10 -5 × K -1 ~12} × 10 -5 × K -1, tensile characteristics and to Luo olefin-based flooring material to become an elastic modulus from a layer for the 100 to 200 MPa. Olefin flooring material according to claim 1 or 2, characterized in that the amount of the scaly inorganic substance was added to 20 parts by weight of the resin 100 parts by weight of the base layer. The olefin-based flooring material according to any one of claims 1 to 3 , wherein the flaky inorganic substance is a flaky inorganic substance of glass and / or talc. The olefin-based flooring material according to any one of claims 1 to 4 , wherein the scale-like inorganic substance has a thickness of 10 µm or less and a major axis of 100 to 600 µm. The olefin flooring flexural modulus of less 200 MPa, olefin flooring according to any one of claims 1 to 5, wherein the residual indentation of not more than 8.0%. The fibrous layer embedded in the lowermost layer of the base layer, any one of claim 1 to 6, at least a portion of the fiber layer is equal to or exposed to the lowermost rear surface of the base layer The olefin-based flooring described.