JP2018204325A - Flooring material - Google Patents

Abstract

To provide a flooring material integrated with a sensor capable of detecting a person while giving a stable walking feeling and having scratch resistance as well as sufficient impact absorption.SOLUTION: A flooring material 10 applied on a floor bed 11 surface is provided with a decorative sheet 7 and a hard layer 5 from a surface side as well as a soft layer 3 and a detected sensor 1 on a floor bed surface side, wherein a compressive elastic modulus of the hard layer 5 measured in accordance with JIS K 7220 is from 0.7 MPa to 2.6 MPa and a compressive elastic modulus of the soft layer 3 in accordance with JIS K 7220 is from 0.01 MPa to 0.06 MPa.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a flooring, and more particularly to a flooring that can detect the presence and movement of a person by incorporating a sensor.

Various attempts have been made to improve services in terms of safety, health, and welfare by monitoring the presence or absence of a person, the movement of a person, or the health condition using a sensor. The apparatus for performing vital sign detection and toilet abnormality determination described in Patent Document 1 includes means for mounting a vital sensor on a toilet floor, means for extracting a heartbeat signal of a human body from the sensor, and displaying a heart rate on a display This is a device for detecting vital signs and judging toilet abnormalities.
The device described in Patent Document 1 is intended to detect abnormalities in a very small space called a toilet, and therefore, various types of sensors based on various principles can be used as sensors. These are relatively small areas that are installed and used on the floor of an original toilet like a toilet mat.

  The presence display system described in Patent Document 2 is a system for displaying the presence or absence of an officer in a company. By using a LAN, a conventional pilot lamp method has a problem such as a ball breakage. This is what I tried to eliminate. This presence display system can automatically indicate that the user is present when the terminal is turned on, but does not automatically detect the presence or absence using a sensor or the like. Therefore, there is a basic drawback that even if the user is seated, the user is not considered to be present unless the terminal is turned on.

  The floor sensor system described in Patent Document 3 has been made for the purpose of solving such problems, and a floor material having a detection sensor composed of a piezoelectric element, and a voltage value of the piezoelectric element from the floor material. And a control unit that performs processing according to the voltage value, and is a floor sensor system that can determine whether a person has been seated on the floor or left by control with a threshold.

  The floor sensor system described in Patent Literature 3 does not require a special operation because a signal indicating that a person has been seated is transmitted as long as a person is seated in a particular seat. This is for detecting whether or not a person is present only in the place of, and detecting the presence / absence in a very limited narrow range, similar to the techniques of Patent Documents 1 and 2.

  For example, for the purpose of ensuring the safety of elderly people living alone, a detection function for the entire living room, the entire bedroom, or the entire house is required. When trying to apply to such a large area, these flooring materials are required to have not only a function as a sensor but also various basic characteristics as a flooring material in a well-balanced manner.

  In addition to surface resistance such as surface wear resistance, scratch resistance, dent resistance, etc., the characteristics required for general flooring are non-slip, impact absorption, cushioning, and water resistance during walking. Light resistance and chemical resistance are also required.

  In order to satisfy these various characteristics, the surface needs to have a certain degree of hardness in order to obtain scratch resistance. On the other hand, it is required to realize a certain level of shock absorption in consideration of walking ability. Therefore, it was considered that a flooring material having a hard layer on the front side and a soft layer on the floor side is effective.

However, if a soft layer is simply provided under the hard layer, sufficient shock absorption cannot be exhibited, and damage is transmitted to the sensor. On the contrary, if the effect of the soft layer is too great, it becomes fluffy, which not only adversely affects walking performance, but also makes detection by a sensor difficult.

  Not only the construction materials used for flooring and processing methods such as foaming, but also the layer thickness, etc. have an effect. However, since the main problem is the balance between the hard layer and the soft layer, it was difficult to set the conditions. As described above, the floor material that fully exhibits the function of the sensor and has both the functions required for the floor material has not been sufficiently considered.

Japanese Patent No. 3965481 JP-A-10-207938 JP 2014-232089 A

  The problem to be solved by the present invention is a floor in which a sensor capable of detecting a person is integrated while having a firm walking feeling and surface scratch resistance, and also having sufficient shock absorption. To provide materials.

  As means for solving the above-mentioned problems, the invention according to claim 1 is a flooring material used by laying on a floor base surface, and has a decorative sheet and a hard layer from the surface side, and a soft layer on the floor base surface side. And the compression elasticity measured according to JIS K 7220 of the hard layer is 0.7 MPa or more and 2.6 MPa or less, and the compression elasticity of the soft layer measured according to JIS K 7220 The flooring material is characterized in that the rate is 0.01 MPa or more and 0.06 MPa or less.

  The floor material according to the present invention has a firm walking feeling and sufficient shock absorption by specifying the compression elastic modulus of the hard layer on the surface side and the soft layer on the floor base surface side in the optimum range, It enables the use of sensors that detect people.

  In the invention described in claim 2, the hard layer has a thickness of 3 mm or more and 9 mm or less, wood powder is 10 parts by weight or more and 30 parts by weight or less, and talc is 5 parts per 100 parts by weight of polyolefin resin. 2. The flooring material according to claim 1, wherein the flooring material is composed of a wood resin base material blended in an amount of 15 parts by weight or more and 15 parts by weight or less and melt-extruded.

  The invention according to claim 3 is characterized in that the soft layer is made of a polyolefin resin sheet having a thickness of 3 mm or more and 9 mm or less and an expansion ratio of 5 times or more and 8 times or less. Or it is the flooring of 2.

  The invention according to claim 4 is the flooring according to any one of claims 1 to 3, wherein the Gs value defined in JIS 6519 is 60 or more and 100 or less.

  The invention according to claim 5 is characterized in that the decorative sheet is a decorative sheet based on a polyolefin-based resin sheet and is laminated on the surface of the hard layer. Item 5. The flooring material according to any one of Items 1 to 4.

  The flooring according to the present invention has a decorative sheet and a hard layer from the surface side, a soft layer and a detection sensor on the floor base surface side, and the compression elastic modulus of the hard layer measured according to JIS K 7220 is 0. The flooring material is characterized in that the compressive elastic modulus measured in accordance with JIS K 7220 of the soft layer is 0.01 MPa or more and 0.06 MPa or less. By limiting the compressive elastic modulus and the compressive elastic modulus of the soft layer to a specific range, it accurately detects the presence or absence of a person with a sensor consisting of a piezoelectric element while combining a firm walking feeling and moderate shock absorption. It has become possible.

  As in the invention according to claim 2, the hard layer has a thickness of 3 mm or more and 9 mm or less, wood powder is 10 parts by weight or more and 30 parts by weight or less and talc is 5% by weight with respect to 100 parts by weight of polyolefin resin. In the case of a wood resin base material blended by 15 parts by weight or more and melt-extruded, there is a problem in recent years due to generation of toxic gas at the time of fire or damage to the incinerator at the time of disposal. These problems can be avoided because no vinyl chloride resin is used.

  In addition, the wood resin base material with the above blending ratio has both the advantages of wood and resin, and is excellent in dimensional stability and durability, stable quality, and excellent workability due to sawing etc. Therefore, it is optimal as a base material for flooring with sensors.

  When the soft layer is made of a polyolefin-based resin sheet having a thickness of 3 mm or more and 9 mm or less and an expansion ratio of 5 times or more and 8 times or less as in the invention described in claim 3, Not only does it contribute to the configuration not using the vinyl chloride resin, but also no plasticizer is used, so even if the vinyl chloride resin-coated electric wires laid under the floor come into contact, there is no adverse effect. In addition, there is little deterioration over time even when compared with polyurethane resin foam and the like, and it is optimal as a flooring material used for a long time.

  When the Gs value defined in JIS 6519 is 60 or more and 100 or less as in the invention described in claim 4, it is possible to achieve both moderate impact absorbability and suitable construction suitability as a flooring material.

  Further, as in the invention according to claim 5, when the decorative sheet is a decorative sheet based on a polyolefin resin sheet and is laminated on the surface of the hard layer, In addition to contributing to vinyl chloride, when a polyolefin-based wood resin extruded base material is used for the hard layer, it is possible to laminate at the same time as extrusion, which is advantageous in terms of manufacturing.

FIG. 1 is a schematic cross-sectional view showing a cross-sectional configuration of a flooring according to the present invention. FIG. 2 is a schematic cross-sectional view showing a state in which the flooring according to the present invention is applied to the floor base surface.

  Hereinafter, the flooring according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a cross-sectional configuration of a flooring 10 according to the present invention. FIG. 2 is a schematic cross-sectional view showing a state in which the flooring 10 according to the present invention is applied to the surface of the floor base 11.

The flooring 10 according to the present invention is a flooring that is used by being laid on the surface of a floor base 11. In addition to wooden materials such as wood, plywood, particle board, wood fiber board, wood wool cement board, and OSB, the floor base 11 is made of inorganic materials such as ALC, cement board, mortar construction surface, concrete placement surface, etc. A base, or a metal base such as a steel plate or a deck plate, or a combination thereof is used. In any case, it goes without saying that the floor base is preferably a flat surface having no steps or irregularities.

  The flooring 10 according to the present invention has a decorative sheet 7 and a hard layer 5 from the front surface side, and has a soft layer 3 and a detection sensor 1 on the floor base surface side. Adhesive layers 6, 4, and 2 are used between the respective layers as necessary.

  As a feature of the flooring 10 according to the present invention, the compression elastic modulus of the hard layer 5 measured according to JIS K 7220 is 0.7 MPa or more and 2.6 MPa or less, and the soft layer 3 conforms to JIS K 7220. The compression elastic modulus measured in this manner is 0.01 MPa or more and 0.06 MPa or less.

  When the hard layer 5 and the soft layer 3 are in such a range of compression elastic modulus, the presence of a person is appropriately detected by the detection sensor 1 made of a piezoelectric element while having a firm walking feeling and appropriate shock absorption. It becomes possible to detect accurately.

  The material of the soft layer 3 is not particularly limited as long as the compression elastic modulus measured according to JIS K 7220 is 0.01 MPa or more and 0.06 MPa or less. If it is in the range of this value, it becomes possible to set it as the flooring which has sufficient shock absorption property with the combination with the hard layer 5 mentioned later.

  As a material used for the soft layer 3, a foamed plastic material, a soft plastic material, a rubber material, or the like is used. As the foamed plastic material, foamed polyolefin resin, foamed polyurethane resin, foamed polystyrene resin or the like is used. As the soft plastic material, a soft silicone resin, a soft polyurethane resin elastomer, or the like is used.

  Among these, a polyolefin resin sheet having a thickness of 3 mm or more and 9 mm or less and an expansion ratio of 5 times or more and 8 times or less is most preferably used in terms of durability and price. Examples of polyolefin resins include polyethylene resins, homopolypropylene resins, random polypropylene resins, block polypropylene resins, propylene-α olefin copolymers, ethylene-propylene copolymers, polybutene resins, ethylene-vinyl alcohol copolymers, and 2 A mixture of seeds or more is used.

  These polyolefin-based resin foam sheets are improved in durability by being cross-linked by electron beam irradiation after foaming.

As the hard layer 5, a material having a compression elastic modulus measured in accordance with JIS K 7220 of 0.7 MPa or more and 2.6 MPa or less is used. If it is in the range of this value, it becomes possible to set it as the flooring material with the sufficient walk feeling, having sufficient shock absorption property by the combination with the said soft layer 3. FIG.
The material of the hard layer 5 is not particularly limited as long as it falls within the compression elastic modulus range, but a mixture of wood powder and a thermoplastic resin is preferably used. In particular, the woody resin base material obtained by blending 10 parts by weight or more and 30 parts by weight or less of wood powder and 5 parts by weight or more and 15 parts by weight or less of talc with respect to 100 parts by weight of polyolefin resin, and melt-extrusion molding thereof It is most suitably used for flooring according to the above.

  As the polyolefin resin, the same resin as that used in the soft layer can be used. If the compression elastic modulus is within the above range, a foaming agent may be added to perform foaming about 1 to 2 times. Further, mica, a heat stabilizer, a compatibilizer for these, and the like may be added as appropriate.

  The decorative sheet 7 can be appropriately used as long as it is a known one composed of a pattern layer that imparts design properties on the base sheet, a surface protective layer that imparts scratch resistance and various physical properties of the flooring surface, and the like. Although it does not specifically limit, If the said hard layer 5 consists of polyolefin resin, what uses a polyolefin resin sheet as a base material sheet is used suitably. As the polyolefin resin, the same resin as that used in the hard layer can be used.

  As the detection sensor 1, a planar sensor on which a piezoelectric element is formed can be suitably used. A method for forming the planar sensor will be described in detail in Examples.

  The adhesive layers 2, 4, and 6 for adhering the above layers are not particularly limited as long as they can be bonded. Examples thereof include a two-component urethane water-based adhesive, a one-component vinyl acetate resin emulsion-based adhesive, and a moisture-curable urethane resin-based hot melt adhesive. If the base sheet of the decorative sheet 7 is a polyolefin-based material and both the hard layer 5 and the soft layer 3 are a polyolefin-based material, a moisture-curable urethane-based hot melt adhesive is preferably used. The thickness of the adhesive layer is preferably about 10 μm to 100 μm in the film thickness after drying.

  The floor material according to the present invention preferably has a Gs value of 60 or more and 100 or less in a floor hardness test (JIS 6519) at the time of a falling collision. This test relates to a steel floor foundation constituent material for gymnasiums, where 100 is the standard range for gymnasium floors and 60 is a tatami floor for judo, but the flooring material of the present invention is lower than 60. If it exceeds 100, it is too hard to be said to have sufficient impact absorption.

<Example 1>
<Create detection sensor>
In the electric field coating and electric field polarization for forming a piezoelectric / pyroelectric film on a steel plate with a thickness of 1 mm, an electrode attached to the tip of the coating sprayer while keeping the object to be coated in a positive electrode (ground state) A high voltage of minus 1 to 90 kV was supplied to the needle to form and hold an electric field between both electrodes of the coating object and the coating sprayer. Next, an inert gas is jetted from the inert gas jet nozzle of the coating sprayer toward the object to be coated, and at the same time, a solution obtained by dissolving the dielectric substance in the solvent is jetted from the dielectric solution nozzle. A negative charge is applied to the droplets of the dielectric solution, and the electrode needle attached to the coating sprayer is opposed to the object to be coated, and atomized spraying while moving to form a prepolarized film on the object to be coated did.

  After that, the electric field coating is temporarily stopped, the position of the coating sprayer that is directed toward the coating object is moved to the outside of the coating object, and an inert gas is injected into the dielectric solution nozzle of the coating spraying machine so that the dielectric solution All the dielectric solution remaining in the nozzle was discharged. Next, only an electric field was formed and maintained between the electrodes of the coating object and the coating sprayer, and the precursor polarization film was polarized to form a piezoelectric / pyroelectric film on the coating object.

  After that, in electric field coating and electric field polarization, the polarizing film formed by electric field coating and electric field polarization is dried by applying thermal energy, and then only electric field polarization is performed to form a piezoelectric / pyroelectric film on the object to be coated. A piezoelectric sensor was obtained.

<Creation of hard layer>
70 parts by weight of polypropylene (E105 manufactured by Prime Polymer Co., Ltd.) was used as the polyolefin-based resin, and 10 parts by weight of talc and 20 parts by weight of wood flour were melted and mixed with a twin-screw extruder set at 200 ° C. On the other hand, a metal mold having a thickness of 5 mm, a width of 150 mm, and a real shape mold attached to the tip of the extruder, and the molten and mixed resin is extruded at a foaming ratio of 1.6 times, and the cooling water is circulated. After drawing into a cooling mold of the same type as the mold, cooling and solidifying, cutting and depositing to a length of 900 mm, heating in an oven at 80 ° C. for 6 hours, cooling the outside air, and a hard layer made of a wood resin substrate did. When the compression elastic modulus was measured according to JIS K 7220, a measured value of 1.3 MPa was obtained.

<Creation of soft layer>
100 parts by weight of a low density polyethylene resin (density: 0.92 g / cm ³ , melt index: 3.6 g / 10 minutes) and 10 parts by weight of azodicarbonamide as a foaming agent are put into a Henschel mixer, and are placed at 300 rpm for 3 minutes. It was rotated and further rotated at 1000 rpm for 3 minutes. This was extruded from a T-die at 160 ° C. and continuously introduced into a vertical hot-air foaming machine at 230 ° C. to produce a polyethylene foam having a thickness of 6.5 mm and a foaming ratio of 5.0 times, which was a soft layer. When this was measured in accordance with JIS K 7220 and the compression modulus was measured, a measured value of 0.03 MPa was obtained.

<Creating a decorative sheet>
A wood grain pattern is printed on a 70 μm thick colored polypropylene resin sheet (Rivest TPO, manufactured by Riken Technos Co., Ltd.) using a gravure ink of a two-component urethane resin binder as a pattern pattern layer, and a transparent polypropylene resin is formed thereon as a transparent thermoplastic resin layer. Then, a two-component urethane resin-based recoating layer is applied to the surface by 1.3 g / m ² (dry), and an ultraviolet curable coating is applied as a surface protective layer by 10 g / m ² and cured. And made a decorative sheet.

<Create flooring>
A moisture curable urethane resin hot melt adhesive (Tyforce manufactured by DIC) was applied to the back surface of the decorative sheet so that the coating thickness after drying was 50 μm, and was bonded to the surface of the hard layer. Thereafter, a moisture curable urethane resin hot melt adhesive (Tyforce manufactured by DIC) was applied to the surface of the soft layer so that the coating thickness after drying was 50 μm, and was bonded to the back surface of the hard layer. Next, the back surface of the soft layer and the steel plate, which was the detection sensor created earlier, were bonded together using the same adhesive to create a flooring.

<Example 2>
Except for using a sensor using a ferroelectric film (Kureha Co., Ltd., KF Piezo) that was formed into a film of 110 μm in thickness by applying a high voltage to a film of polyvinylidene fluoride polymer as a detection sensor. A flooring was prepared in the same manner as in 1.

<Comparative Example 1>
A flooring was prepared in the same manner as in Example 1 except that a polyethylene foam having a thickness of 2.0 mm and a foaming ratio of 10 times was used as the soft layer. The compression elastic modulus of the soft layer measured in accordance with JIS K 7220 was 0.001 MPa.

<Comparative Example 2>
A flooring was prepared in the same manner as in Example 1 except that the hard layer was extruded at an expansion ratio of 3.0. The compression elastic modulus of the hard layer measured according to JIS K 7220 was 0.5 MPa.

<Comparative Example 3>
A flooring was prepared in the same manner as in Example 1 except that the hard layer and the soft layer in Comparative Example 1 were replaced and a decorative sheet was attached to the surface of the soft layer.

<Evaluation of scratch resistance>
As an evaluation of scratch resistance, a pencil hardness test was performed. The test method was based on the JIS K 5600-5-4 paint general test method scratch hardness (pencil method). As an evaluation method, the hardness of the pencil that began to scratch was visually confirmed.

<Evaluation of dent resistance>
A DuPont impact test based on JIS K 5400 was conducted as an evaluation of how the floor material was recessed when the fallen object fell. Under the conditions of a shooting die radius of 6.35 mm, a weight of 500 g, and a height of 500 mm, a dent made in the flooring was visually confirmed.

<Flame hardness test at the time of a fall collision>
The Gs value was measured by a floor hardness test at the time of falling collision according to JIS 6519.

<Current detection by detection sensor>
We connected what was wired to the electrode of the detection sensor in advance to a personal computer, and prepared an environment in which intensity (→ current wavelength intensity measurement) was possible with Audacity (voice recording software). The unit of the measured value is mV.
The size of the flooring was A4 size 21 cm wide and 30 cm long. The floor was set up as a landing point for the right foot when walking. The pedestrian was a healthy adult male weighing 75 kg.

  The test results are summarized in Table 1.

  As can be seen from the results in Table 1, the flooring according to the present invention is balanced in terms of surface scratch resistance, impact resistance, and hardness at the time of falling collision, and also has suitability for a detection sensor. is there.

DESCRIPTION OF SYMBOLS 1 ... Detection sensor 2 ... Adhesive layer 3 ... Soft layer 4 ... Adhesive layer 5 ... Hard layer 6 ... Adhesive layer 7 ... Cosmetic sheet 8 ... Signal wire 10 ..Floor 11 ... Floor base 12 ... Adhesive layer

Claims (5)

  A flooring material used by laying on a floor base surface, having a decorative sheet and a hard layer from the surface side, a soft layer and a detection sensor on the floor base surface side, and measuring according to JIS K 7220 of the hard layer A flooring material having a compression elastic modulus of 0.7 MPa or more and 2.6 MPa or less, and a compression elastic modulus measured according to JIS K 7220 of the soft layer of 0.01 MPa or more and 0.06 MPa or less.   The hard layer has a thickness of 3 mm or more and 9 mm or less, blends 10 to 30 parts by weight of wood flour and 5 to 15 parts by weight of talc with respect to 100 parts by weight of polyolefin resin, and melts. The flooring material according to claim 1, wherein the flooring material comprises a woody resin base material formed by extrusion molding.   The flooring according to claim 1 or 2, wherein the soft layer is made of a polyolefin resin sheet having a thickness of 3 mm to 9 mm and an expansion ratio of 5 times to 8 times.   The flooring material according to any one of claims 1 to 3, wherein a Gs value defined in JIS 6519 is 60 or more and 100 or less.   5. The decorative sheet according to claim 1, wherein the decorative sheet is a decorative sheet based on a polyolefin-based resin sheet and is laminated on the surface of the hard layer. Flooring.

Images