JP5614871B2 - Thermal insulation floor sheet made of thermoplastic resin - Google Patents

Description

  The present invention relates to a heat insulating floor sheet made of a thermoplastic resin having heat insulating properties used for a pool side, a ship deck, a veranda, a rooftop and the like.

  Thermoplastic resin floor sheets are excellent in terms of functionality, design, workability, and price, and are widely used mainly indoors in public facilities, buildings, schools, hospitals, factories, condominiums, and the like. Furthermore, it is also used outdoors on the poolside, condominium veranda, outside corridor, stairs and so on. Among the floor sheets made of thermoplastic resin, polyvinyl chloride is mainly used from the viewpoints of function, price, workability and workability.

  Unlike outdoor applications, outdoor applications require higher weather resistance, contamination resistance, and slip resistance. However, in the poolside and the like, not only these functions but also safety when walking barefoot is an issue. That is, when walking with a bare foot on a floor surface whose surface is heated by sunlight, the floor is hot, and in some cases there is a risk of causing burns.

Therefore, as a technique to reduce the temperature rise due to sunlight, the surface of the thermoplastic resin floor sheet by sunlight is formed by forming a film with a heat-shielding paint on the surface of the thermoplastic resin floor sheet. There is a method for suppressing temperature rise (see Patent Document 1). However, this method is insufficient as an effect of suppressing the rise in the surface temperature of the sheet due to sunlight, and when this is actually used poolside, the floor sheet surface made of thermoplastic resin heated by sunlight is used. It is hot when touching bare feet, and there is a risk of low temperature burns if touched for a long time.

Furthermore, since it is necessary to apply the paint to the surface of the flooring, it takes time and effort in terms of construction, and there is a problem in delivery time and cost. Further, in terms of quality, the coating film may be peeled off over time or the heat shielding performance may not be exhibited due to wear.
In particular, in the case of flooring with unevenness on the surface, it is difficult for the coating film to be formed on the projections because the coating with heat insulation is applied after the formation of the projections and depressions. Therefore, it was difficult to form a uniform film. Furthermore, the convex portion is more easily worn than the concave portion, and the coating film made of the paint is more easily peeled off. There is also a problem in terms of durability of the coating film made of the heat-shielding coating material.

  On the other hand, when such a thermoplastic resin floor sheet is laid in a part that may come into contact with the sterilizing liquid such as a poolside, the surface of the thermoplastic resin floor sheet is discolored by the sterilizing liquid, The appearance may be impaired.

Utility model registration No. 3118832

  The present invention suppresses the rise in the surface temperature of the thermoplastic resin floor sheet caused by sunlight, and does not make it feel hot even if it stands still or walks on the floor floor made of thermoplastic resin. Provide a floor insulating sheet made of thermoplastic resin that is excellent in operability and embossability, and when the insulating floor sheet made of thermoplastic resin is laid on a site using a sterilizing liquid such as a poolside for a long period of time. It is an object of the present invention to provide a heat insulating floor sheet made of a thermoplastic resin that is not easily discolored even when exposed to a sterilizing and disinfecting liquid, does not impair the appearance, and does not deteriorate the heat insulating function.

Means taken by the present invention to solve the above problems is a floor sheet made of a thermoplastic resin having a surface layer having a solar reflectance of 40 to 80% in a wavelength region of 300 to 2100 nm in claim 1, The surface layer contains one or more color pigments selected from condensed azo-based, iron oxide-based, and complex oxide-based materials, a plurality of convex portions are formed on the surface of the surface layer, and the upper surface area of the convex portions There is 3.0～10.0Mm ^2, the height is 0.7~1.5mm of the convex portion, the heat for the pool distance between convex portions adjacent a 1.0~3.0mm In claim 2, before and after immersing the thermoplastic resin floor sheet in a chlorine-based sterilizing / disinfecting solution for 30 days in a 30-day immersion test of a 10% strength by weight sterilizing / disinfecting solution. CIE-L * a * b * color system of the above surface layer The color difference ΔE * ab value at 5 is a poolside thermoplastic resin thermal insulation floor sheet having a value of 5.0 or less.

The present invention has a surface layer having a solar reflectance of 40 to 80% in a wavelength region of 300 to 2100 nm, thereby suppressing an increase in the temperature of the surface of the thermoplastic resin floor sheet caused by sunlight. By providing a plurality of protrusions on the floor sheet surface, the area where the soles come into contact with the floor surface of the flat thermoplastic resin floor sheet is reduced, and the floor sheet made of thermoplastic resin is heated by sunlight. Even if you stand still or walk on the surface with bare feet, it becomes difficult to feel hot. Moreover, setting the top surface area of the projection to 3.0～10.0Mm ^2, the height of the projections to 0.7 to 1.5 mm, the distance between the convex portions adjacent to 1.0~3.0mm As a result, even if you walk and stand still on the surface of a thermoplastic resin floor sheet heated by sunlight, the effect of making it difficult to feel the heat will increase, and an excellent heat shielding effect will be obtained under the hot summer sun Be able to. In addition, it was able to combine excellent anti-slip properties, drainage properties, cleanability, and embossability.

Further, even when the heat insulating floor sheet made of the thermoplastic resin of the present invention is exposed to 10% by weight of a sterilizing liquid for 30 days, the color difference ΔE ^* ab value in the CIE-L ^* a ^* b ^* color system is 5. When the thermal insulation floor sheet made of thermoplastic resin is laid at a site in contact with the sterilizing / disinfecting liquid because it is 0 or less, the discoloration due to the disinfecting liquid is not noticeably discolored, and further, the appearance of the floor sheet is not impaired. The effect that the performance can be maintained without causing deterioration of the heat shielding performance due to discoloration is obtained.

Schematic perspective view of a heat-insulating floor sheet according to an embodiment of the present invention (FIG. 1-1) Schematic perspective view of an entire heat-insulating floor sheet according to an embodiment of the present invention (FIG. 1-2) In an embodiment of the present invention The model perspective view which expanded a part of the heat insulation floor sheet which concerns 1 is an enlarged sectional view taken along line AA in FIG. 1 (FIG. 2A). FIG. 2B is an enlarged sectional view taken along line AA in FIG. -1) Enlarged view of dotted circle) Schematic perspective view of a heat-insulating floor sheet according to an embodiment of the present invention having a portion where no convex portion is formed (FIG. 3-1) The shielding according to the embodiment of the present invention in which the portion where the convex portion is not formed is formed in a line shape. Schematic perspective view of the entire thermal floor sheet (FIGS. 3-2) to (FIG. 3-4) Schematic perspective view of the entire thermal insulating floor sheet according to the embodiment of the present invention in which the portions not forming the convex portions are in a lattice shape. Sectional drawing of the thermoplastic resin thermal insulation floor sheet of the aspect which laminated | stacked the base material layer of this invention

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  1 is a schematic perspective view of a thermoplastic resin thermal insulation floor sheet according to the present invention, and FIG. 2 is an enlarged cross-sectional view of a cut surface along the line AA in FIG.

  The heat insulating floor sheet made of the thermoplastic resin of the present invention has a large number of convex portions 2 having various shapes such as a rectangle, a polygon, a circle, an ellipse, and an indeterminate shape on the surface, and the convex portions 2 are linear or random. An array is formed. Further, it is preferable to form a finer uneven portion on the upper surface of the convex portion 2. This improves the anti-slip property and, in addition, allows the surface to be frosted. Therefore, this is a preferred embodiment for improving the design and aesthetics.

  Moreover, although this convex part 2 formed in the surface layer of the thermoplastic resin thermal insulation floor sheet 1 is formed over the whole surface layer, there may be a part in which the convex part 2 is not partially formed. In this case, as shown in FIG. 3, it is preferable to make the portion where the convex portion 2 is not formed into a line shape or a lattice shape, so that the design can be enhanced, and further functions such as drainage and anti-slip properties can be added. There is also an effect.

  Further, the convex part 2 is rounded so that the boundary between the convex part upper surface 2a and the convex part side surface 2b is not sharp so that it does not hurt even when walking with bare feet. If the boundary between the convex upper surface 2a and the convex side surface 2b is pointed, it is not preferable from the viewpoint of safety because it may cause pain when walking barefoot and may cause a cut.

Furthermore, the upper area of the convex part 2 is 3.0-10.0 mm < ² > from a viewpoint of making it hard to feel hot even if it stands still or walks on the surface of the heat insulating floor sheet made of thermoplastic resin heated by sunlight. It is necessary to set it as 4.0 to 8.0 mm ² . Unfavorably feel pain when walking on hot bed sheet surface and less than 3.0 mm ² barrier thermoplastic resin barefoot, whereas, 10.0 mm ² larger than the sole thermal barrier thermoplastic resin The area in contact with the surface of the floor sheet becomes large, and is susceptible to heat. In some cases, there is a risk of low temperature burns, which is not preferable.

  Moreover, it is necessary to make the space | interval of one convex part 2 and the other adjacent convex part into 1.0-3.0 mm, and the heat | fever accumulated between the convex part and the convex part is discharge | released by this. Since it becomes easy, it can suppress that a thermoplastic resin thermal insulation floor sheet accumulates heat. If the distance is less than 1.0 mm, heat tends to accumulate between the convex portions, and at the same time, the drainage performance also deteriorates. When the thickness is larger than 3.0 mm, the sole comes into contact with the concave surface of the thermoplastic resin thermal insulation floor sheet 1 and the surface becomes easy to feel heat, and the foot sole bites into the surface asperity. Will feel. Further, it is more preferable to set the distance to 1.5 to 2.5 mm.

  Moreover, it is necessary to set the height of the convex part formed in the heat-insulating floor sheet 1 surface made of thermoplastic resin to 0.7 to 1.5 mm, and to set to 0.9 to 1.3 mm. preferable. When the height of the convex portion is less than 0.7 mm, the slip resistance is poor, and the soles come into contact with the concave and convex surfaces of the thermoplastic resin thermal insulation floor sheet 1 so that the heat is easily felt. On the other hand, when the height of the convex portion is larger than 1.5 mm, dust easily collects between the adjacent convex portions, the cleaning property is poor, and the embossing property is also poor.

  The thermoplastic resin thermal insulation floor sheet 1 of the present invention is often used in which a surface layer 1a and a back layer 1b are laminated and integrated as shown in FIG. 1, but a single layer sheet having only a surface layer or a surface layer 1a. A lower layer may be provided with a backing layer, an intermediate layer, a base material such as glass fiber, or the like to form a multilayer structure. A substrate layer such as glass fiber can be provided between the surface layer 1a and the back layer 1b or inside the back layer 1b to enhance dimensional stability, and a pattern can be formed on the surface layer to enhance aesthetics and design. .

  As the base material layer, woven fabric such as linen, cotton fabric, glass fiber woven fabric, natural fiber nonwoven fabric such as cotton and linen, chemical fiber nonwoven fabric such as polyester, nonwoven fabric such as glass nonwoven fabric, etc. can be used, and dimensional stability A glass fiber woven fabric and a glass non-woven fabric are preferable from the effect of increasing the thickness, and a glass fiber woven fabric is more preferable. When the glass fiber woven fabric is laminated with the layer made of the thermoplastic resin, the glass fiber woven fabric is laminated on the layer made of the thermoplastic resin because the thermoplastic resin penetrates into the eyes of the woven fabric. Further, when the glass fiber woven fabric is laminated as the base material layer 4 between the back layer 1b1 and the back layer 1b2 as shown in FIG. 4, the thermoplastic resin of one back layer from the eyes of the glass fiber woven fabric is another back layer. This is a preferred embodiment because the back layer 1b1, the base material layer 4 and the back layer 1b2 are firmly laminated in order to bite into the substrate.

  Examples of the thermoplastic resin used for the surface layer 1a include olefin resins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer resin, and ethylene- (meth) acrylate copolymer resin, polyvinyl chloride resins, and acrylic resins. Resins, styrene resins, SBR, NBR, and the like can be exemplified, and two or more of these resins may be used in combination.

  As the above-mentioned polyvinyl chloride resin, a polyvinyl chloride resin which is a vinyl chloride homopolymer, a copolymer of vinyl chloride and vinyl acetate, ethylene, (meth) acrylic acid ester, vinylidene chloride, etc. can be used. From the viewpoint of excellent properties, moldability, and adhesion to a substrate, a polyvinyl chloride resin can be more preferably used.

  In addition, the above thermoplastic resins include antioxidants, lubricants, stabilizers, UV absorbers, light stabilizers, plasticizers, processing aids, flame retardants, fillers, pigments, antibacterial agents, antibacterial agents as necessary. Molding agents, antistatic agents and the like may be added.

  In addition, when it is necessary to improve weather resistance, light resistance, and durability during outdoor use, it is preferable to add an ultraviolet absorber or a hindered amine light stabilizer (HALS). Also good.

Examples of the ultraviolet absorber include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2-hydroxy-4-tert-butyl-4 ′-(2-methacloyl). Benzophenone series such as oxyethoxyethoxy) benzophenone and 5,5′-methylenebis (2-hydroxy-4-methoxybenzophenone); 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2- (2-hydroxy-5) -Tert-octylphenyl) benzotriazole, 2- (2-hydroxy-3,5-di-tert-butylphenyl) -5-chlorobenzotriazole, 2- (2-hydroxy-3-tert-butyl-5-methyl) Phenyl) -5-chlorobenzotriazole, 2- 2-hydroxy-3-dodecyl-5-methylphenyl) benzotriazole, 2- (2-hydroxy-3-tert-butyl-5-C7-C9 mixed alkoxycarbonylethylphenyl) triazole, 2- (2-hydroxy-3 , 5-Dicumylphenyl) benzotriazole, 2,2′-methylenebis (4-tert-octyl-6-benzotriazolylphenol), 2- (2-hydroxy-3-tert-butyl-5-carboxyphenyl) Polyethylene glycol ester of benzotriazole, 2- (2H-benzotriazol-2-yl) -4-6bis (1-methyl-1-phenylethyl) phenol, 2- (2H-benzotriazol-2-yl) -6 -Benzotriazols such as (linear and side chain dodecyl) -4-methylphenol 2- (2-hydroxy-4-hexyloxyphenyl) -4,6-diphenyl-1,3,5-triazine, 2- (2-hydroxy-4-methoxyphenyl) -4,6-diphenyl- Triazines such as 1,3,5-triazine, 2- (2-hydroxy-4-octoxyphenyl) -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine; phenyl salicylate , Resorcinol monobenzoate, 2,4-ditert-butylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate, 2,4-di-tert-amylphenyl-3,5-di-tert-butyl Benzoate systems such as -4-hydroxybenzoate, hexadecyl-3,5-di-tert-butyl-4-hydroxybenzoate; 2-ethyl- Substituted oxanilide systems such as' -ethoxyoxanilide, 2-ethoxy-4'-dodecyloxanilide; ethyl-α-cyano-β, β-diphenylacrylate, methyl-2-cyano-3-methyl-3- ( and cyanoacrylates such as p-methoxyphenyl) acrylate.
The addition amount of the ultraviolet absorber is preferably 0.1 to 2.0 parts by weight, more preferably 0.3 to 1.5 parts by weight with respect to 100 parts by weight of the thermoplastic resin. If the added amount is less than 0.1 parts by weight, it is difficult to obtain the effect, and if the added amount is more than 2.0 parts by weight, problems such as plate-out to the processing machine, bloom, and bleed may occur.

  When a polyvinyl chloride resin is used as the thermoplastic resin, it is preferable to add a plasticizer and a stabilizer. Examples of the plasticizer include phthalic acid plasticizers such as DOP, DINP and DUP, adipic acid plasticizers such as DOA, DINA and DIDA, polyester plasticizers, trimellitic acid plasticizers, and phosphorus such as TCP and TXP. Acid ester plasticizers and epoxy plasticizers such as epoxidized soybean oil can be used. Of these, phthalic acid plasticizers such as DOP and DINP are preferred from the viewpoint of weather resistance, durability, plasticization efficiency, and processability.

  The amount of the plasticizer added is preferably 20 to 80 parts by weight and more preferably 30 to 60 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin from the viewpoint of processability and flexibility.

  As the stabilizer, Ba / Zn-based, Ca / Zn-based, Pb-based, and tin-based stabilizers can be used, and Ba / Zn-based is used in terms of safety, thermal stability, and workability. preferable. Further, from the viewpoints of thermal stability and processability, anti-coloring agents such as phosphites, polyols, β-diketones, hydrotalcite and the like may be added.

  The amount of the stabilizer added is preferably from 0.1 to 5 parts by weight, preferably from 0.3 to 3 parts by weight, based on 100 parts by weight of the polyvinyl chloride resin from the viewpoint of processability, thermal stability, and weather resistance. Further preferred.

  When the thermoplastic resin thermal insulation floor sheet of the present invention has a multilayer structure, the thermoplastic resin that can be used for the surface layer can be used for the layers other than the surface layer. From the viewpoint of adhesion between the layers, it is preferable to use the same type of thermoplastic resin as the surface layer. For example, in FIG. 1, when a polyvinyl chloride resin is used for the surface layer 1a, a polyvinyl chloride resin is also used for the back layer 1b. Use is a preferred embodiment.

  Furthermore, the additive which can be used for a surface layer can be added to layers other than the surface layer. Moreover, when layers other than the said surface layer consist of a polyvinyl chloride-type resin, the said plasticizer and said stabilizer which can be used for a surface layer can be used. In this case, the amount of the plasticizer added is preferably 10 to 80 parts by weight, more preferably 30 to 70 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin from the viewpoint of processability and flexibility. .

  The surface layer of the heat insulating floor sheet made of the thermoplastic resin of the present invention is required to have a solar reflectance of 40 to 80% in a wavelength region of 300 to 2100 nm. If the solar reflectance is less than 40%, the temperature rise on the surface of the thermoplastic resin thermal insulation floor sheet due to sunlight cannot be suppressed, and it is difficult to walk barefoot due to heat and there is a risk of low temperature burns. is there. If the solar reflectance is greater than 80%, the temperature rise on the surface of the thermoplastic resin thermal insulation floor sheet can be suppressed and it becomes difficult to feel heat, but the reflection of sunlight on the surface of the thermoplastic resin thermal insulation floor sheet becomes stronger. Risk of dizziness. It is preferable to use a surface layer having a solar reflectance of 55 to 70% because it is possible to more appropriately prevent a rise in surface temperature and dizziness due to reflection.

  It is necessary to add a predetermined pigment to the surface layer of the heat insulating floor sheet made of the thermoplastic resin of the present invention so that the solar reflectance in the wavelength region of 300 to 2100 nm is 40 to 80%. Here, as a pigment added to the surface layer of the thermoplastic resin heat insulating floor sheet, it is desirable to use a pigment having a high reflectance to near infrared rays. The solar reflectance can be measured by the method defined in JIS A 5759.

  Examples of the pigment include phthalocyanine, azo, condensed azo, anthraquinone, perinone / perylene, quinacridone, triphenylmethane, dioxazine, titanium oxide, iron oxide (red iron oxide, yellow iron oxide) ), Spinel type firing system, lead chromate system, bitumen system, chromium oxide system, composite oxide system, and condensed polycyclic system can be used. Among them, 300 to 2100 nm of the above pigment alone is used. Those having a solar reflectance of 50% or more in the wavelength region are preferable.

  In addition, when the amount of the pigment added is small, it is difficult to obtain the vividness of the thermoplastic heat-insulating floor sheet. When the amount of the pigment added is large, there is a problem that the pigment tends to plate out on the processing machine surface, and the workability is lowered. There is a fear. Therefore, it is preferable from the viewpoint of vividness and workability of the sheet that the pigment is added in an amount of 3.0 to 25.0 parts by weight with respect to 100 parts by weight of the thermoplastic resin.

Therefore, as described above, in order to be able to walk without feeling pain and heat with bare feet, and to have excellent anti-slip property, drainage property, cleanability, and embossability, the solar reflection in the wavelength region of 300 to 2100 nm After making the floor sheet made of a thermoplastic resin having a surface layer with a rate of 40 to 80%, the upper surface area of the surface convex portion is 3.0 to 10.0 mm ^2, and the height of the convex portion is 0.7 to The distance between adjacent convex portions needs to be set to 1.0 to 3.0 mm.

When the thermoplastic heat-insulating floor sheet 1 of the present invention is used in a portion that may come into contact with a sterilizing / disinfecting agent liquid such as a poolside, the thermoplastic heat-insulating floor sheet is used in a 10% by weight sterilizing / disinfecting liquid for 30 days. Even after exposure, the color difference ΔE ^* ab value in the L ^* a ^* b ^* color system defined by the International Commission on Illumination (CIE) is preferably 5.0 or less, and the color difference ΔE ^* ab value is 5.0 or less. In this case, when visually observed, discoloration is hardly noticeable and it can be determined that the appearance is not impaired. On the other hand, if the color difference ΔE ^* ab value is greater than 5.0, discoloration can be visually confirmed. Therefore, it may be determined that it is not preferable when attention should be paid to changes in appearance. Further, it is more preferable that the color difference ΔE ^* ab value is smaller than 3.0, since it can be determined that the color difference is not visually observed.

Preferable color pigments that satisfy the above conditions include condensed azo, iron oxide (red iron oxide, yellow iron oxide), and complex oxide systems. In addition, it is preferable to use these pigments in combination rather than using them alone, since the color difference ΔE ^* ab value becomes smaller, and the aesthetics are also improved.

  Examples of the disinfectant include chlorine-based, phenol-based, alcohol-based, etc., and sterilized disinfecting of the pool is chlorine-based potassium dichloroisocyanurate, calcium hypochlorite, sodium trichloroisocyanurate, sodium dichloroisocyanurate, Sodium hypochlorite is mainly used.

The sterilizing / disinfecting solution used for the evaluation of the “color difference ΔE ^* ab value of the surface layer in a 30-day immersion test of a 10% by weight sterilizing / disinfecting solution” of the present invention is obtained by dissolving or diluting the sterilizing / disinfecting agent with water. % Adjusted.
Further, the disinfectant used in the above test of the present invention is a disinfectant which is actually used in a pool as a disinfectant and causes a problem with discoloration. In the case of a thermoplastic thermal insulation floor sheet having a poolside or the like as a main laying place, it is preferable to evaluate with the above-mentioned chlorine-based disinfectant.

The color difference ΔE ^* ab value is a value obtained by measuring the surface layer of the thermoplastic thermal insulation floor sheet before and after immersion with a spectrocolorimeter, and ΔE ^* ab = [(ΔL ^* ) ² + (Δa ^* ) ² + (Δb ^{* 2} ] Calculated from ^1/2 calculation formula.

That is, the ΔE ^* ab value of the present invention is an index representing the color change before and after the thermoplastic thermal insulation floor sheet is immersed in a sterilizing / disinfecting solution for 30 days. The larger this ΔE ^* ab value, the greater the ΔE ^* ab value. The color change was large, indicating that the appearance was greatly affected by the disinfectant.

  The thermoplastic thermal insulation floor sheet of the present invention can be produced by a known method such as calendar molding, extrusion molding, coating molding, etc., and calendar molding and extrusion molding are suitable.

  Moreover, when making the thermoplastic thermal insulation floor sheet of this invention into a multilayer structure, it can manufacture by, for example, extruding each layer simultaneously with a multilayer extruder, and laminating | stacking. Alternatively, each layer can be formed by extrusion molding, calendar molding, or the like, and each layer can be laminated by a laminating machine. Furthermore, it can also be manufactured by simultaneously performing sheet forming and lamination with a calendar or an extruder. In the present invention, the use of a calendering machine is preferable in that the color, width, and thickness of the surface layer can be easily changed, and a sheet can be produced at a higher speed than an extruder.

When providing the base material layer, the base material layer can be provided at a predetermined position, but when the base material layer is provided at the lowermost layer, for example, the base material layer is laminated by a laminating machine after manufacturing the above sheet. Can be manufactured. Further, the base material layer and the sheet can be produced simultaneously.
Furthermore, when providing a base material layer between each layer, it can manufacture by laminating | stacking a sheet | seat further on the back surface side which laminated | stacked the sheet | seat after laminating | stacking a sheet | seat and a base material layer as mentioned above. Also when laminating the sheet on the back side, a sheet prepared in advance may be laminated with a laminating machine in the same manner as described above, and at the same time the sheet is produced with a calendar or an extruder, etc. It can also be laminated. Moreover, when the adhesiveness of a base material layer and each layer is not fully acquired, various primer processes can be given to a base material layer.

  Furthermore, the surface layer 1a of the thermoplastic heat insulating floor sheet 1 of the present invention is provided with a large number of convex portions 2, which can be obtained by embossing a multilayer or single layer sheet produced by, for example, a calendar or an extruder. Can be manufactured. Moreover, the convex part 2 can also be formed continuously in-line by embossing after manufacturing a multilayer or a single layer sheet with an extruder or a calendar.

  Further, specific examples and comparative examples of the present invention will be described, but the present invention is not limited to these examples.

[Surface layer-1]
8.0 parts by weight of titanium oxide pigment (TiO ₂ ), 5.0 parts by weight of composite oxide green pigment (composition: TiO ₂ —CoO—NiO—ZnO), composite with 100 parts by weight of vinyl chloride resin Each of the oxide-based blue pigments (composition: CoO—Al ₂ O ₃ ), 1.5 parts by weight, was added in combination to prepare a sheeted sample.

[Surface layer-2]
10.0 parts by weight of titanium oxide pigment (TiO ₂ ), 5.0 parts by weight of composite oxide green pigment (composition: TiO ₂ —CoO—NiO—ZnO), composite with 100 parts by weight of vinyl chloride resin A sheet sample was prepared in the same manner as in the surface layer-1, except that 1.5 parts by weight of an oxide-based blue pigment (composition: CoO—Al ₂ O ₃ ) was added in a composite manner.

[Surface-3]
12.0 parts by weight of titanium oxide pigment (TiO ₂ ), 5.0 parts by weight of composite oxide green pigment (composition: TiO ₂ —CoO—NiO—ZnO), composite with 100 parts by weight of vinyl chloride resin A sheet sample was prepared in the same manner as in the surface layer-1, except that 1.5 parts by weight of an oxide-based blue pigment (composition: CoO—Al ₂ O ₃ ) was added in a composite manner.

[Surface-4]
A sheet sample was obtained in the same manner as in the surface layer-1, except that 5.0 parts by weight of a complex oxide green pigment (composition: TiO ₂ —CoO—NiO—ZnO) alone was added to 100 parts by weight of the vinyl chloride resin. Was made.

[Surface-5]
A sheet sample was prepared in the same manner as in the surface layer-1, except that a complex oxide blue pigment (composition: CoO—Al ₂ O ₃ ) was added alone by weight of 100 parts by weight of the vinyl chloride resin. did.

[Surface layer-6]
A sheet sample was prepared in the same manner as in the surface layer-1, except that 8.0 parts by weight of a titanium oxide pigment (TiO ₂ ) was added alone to 100 parts by weight of the vinyl chloride resin.

Thermal insulation was evaluated from the solar reflectance of the sheet samples described in Surface Layer-1 to Surface Layer-6. The evaluation results are shown in Table 1.
<Measurement of solar reflectance>
The test was conducted in accordance with the optical performance test in JIS A 5759 “Film for window glass”. The measurement results of the solar reflectance of the surface layer are shown in Table 1.

[Example 1]
Surface layer-3, which had a solar reflectance measured by the above method of 57%, was selected as the surface layer, and a back layer was laminated thereon, thereby producing a thermoplastic thermal insulation floor sheet having a flat surface. Further, by embossing the sheet, a vinyl chloride system in which the upper area of the protrusions is 3.3 mm ² , the distance between adjacent protrusions is 1.1 mm, and the height of the protrusions is 0.8 mm. A resin sheet was produced.
Here, the back layer is formed by laminating a layer made of a resin material containing 50 parts by weight of a plasticizer, 3 parts by weight of a stabilizer, and 150 parts by weight of an inorganic filler with respect to 100 parts by weight of a vinyl chloride resin. To make a sheet.

[Example 2]
Except that embossing was performed so that the upper area of the convex portion was 4.2 mm ² , the interval between adjacent convex portions was 1.7 mm, and the height of the convex portion was 0.7 mm, the same as in Example 1. A vinyl chloride resin sheet having a plurality of convex portions formed on the surface was produced.

[Example 3]
Except that embossing was performed so that the upper area of the convex portion was 8.0 mm ² , the interval between adjacent convex portions was 2.6 mm, and the height of the convex portion was 1.3 mm, the same as in Example 1. A vinyl chloride resin sheet having a plurality of convex portions formed on the surface was produced.

[Example 4]
Except for embossing where the upper area of the protrusions is 7.5 mm ² , the distance between adjacent protrusions is 2.4 mm, and the height of the protrusions is 1.0 mm, the same as in Example 1. A vinyl chloride resin sheet having a plurality of convex portions formed on the surface was produced.

[Example 5]
Except that embossing was performed so that the upper area of the convex portion was 9.5 mm ² , the interval between adjacent convex portions was 1.4 mm, and the height of the convex portion was 1.1 mm, the same as in Example 1. A vinyl chloride resin sheet having a plurality of convex portions formed on the surface was produced.

[Example 6]
Except for embossing where the upper area of the convex part is 6.0 mm ² , the distance between adjacent convex parts is 2.0 mm, and the height of the convex part is 1.5 mm, the same as in Example 1. A vinyl chloride resin sheet having a plurality of convex portions formed on the surface was produced.

[Comparative Example 1]
Except that embossing was performed so that the upper area of the convex portion was 3.7 mm ² , the interval between adjacent convex portions was 0.9 mm, and the height of the convex portion was 0.8 mm, as in Example 1. A vinyl chloride resin sheet having a plurality of convex portions formed on the surface was produced.

[Comparative Example 2]
Except that embossing was performed so that the upper area of the convex portion was 10.1 mm ² , the interval between adjacent convex portions was 2.6 mm, and the height of the convex portion was 1.5 mm, as in Example 1. A vinyl chloride resin sheet having a plurality of convex portions formed on the surface was produced.

[Comparative Example 3]
Except that embossing was performed so that the upper area of the protrusions was 3.3 mm ² , the distance between adjacent protrusions was 1.3 mm, and the height of the protrusions was 1.6 mm, as in Example 1. A vinyl chloride resin sheet having a plurality of convex portions formed on the surface was produced.

[Comparative Example 4]
Except that embossing was performed so that the upper area of the convex portion was 3.3 mm ² , the interval between adjacent convex portions was 3.5 mm, and the height of the convex portion was 0.6 mm, the same as in Example 1. A vinyl chloride resin sheet having a plurality of convex portions formed on the surface was produced.

[Comparative Example 5]
Except that embossing was performed so that the upper area of the convex portion was 2.7 mm ² , the interval between adjacent convex portions was 0.5 mm, and the height of the convex portion was 2.0 mm, as in Example 1. A vinyl chloride resin sheet having a plurality of convex portions formed on the surface was produced.

[Comparative Example 6]
Except that embossing was performed so that the upper area of the convex portion was 12.0 mm ² , the interval between adjacent convex portions was 3.1 mm, and the height of the convex portion was 0.3 mm, the same as in Example 1. A vinyl chloride resin sheet having a plurality of convex portions formed on the surface was produced.

The obtained vinyl chloride resin sheet was evaluated by the evaluation methods and evaluation criteria described below. The results are shown in Table 2 for Examples and Table 3 for Comparative Examples.
<Evaluation method and evaluation criteria>
(1) Sensitivity of bare feet: The obtained vinyl chloride resin sheet was installed outdoors on a sunny day in summer, and a person walked bare feet to evaluate the sense of warmth of bare feet.
○: Bare foot walking is possible without feeling hot △: Bare foot walking is possible although it feels hot ×: Bare foot walking is hot and hot (2) Feeling of soles: The obtained vinyl chloride resin sheet is used outdoors on a sunny day in summer A person walked barefoot and evaluated the touch to bare feet.
○: Feels no pain when walking with bare feet △: Feels pain when walking with bare feet, but can walk bare feet ×: Feels painful when walking with bare feet, difficult to walk bare feet (3) Drainage Property: Water was allowed to flow over the floor surface and evaluated visually.
◯: Water flow is good ×: Water flow is bad (4) Anti-slip property: Water was sprayed on the floor surface, and after being wet, a human walked and evaluated in a sensitive manner.
○: It is hard to slip and can walk safely △: Slightly slip, but can walk safely ×: Easy to slip and dangerous (5) Embossability ○: Good workability ×: Poor workability

An embodiment suitable for laying in a site where a sterilizing liquid is used will be described below.
[Examples 7 to 9]
Except that the kind of pigment and the addition amount with respect to 100 parts by weight of the vinyl chloride resin are as shown in Table 4, it has a surface layer and a back layer in the same manner as in Example 3, and the upper area of the convex portion is 8 A vinyl chloride resin sheet having a thickness of 0.0 mm ² , an interval between adjacent convex portions of 2.6 mm, and a height of the convex portions of 1.3 mm was produced. The evaluation results are shown in Table 4. Here, the solar reflectance in Table 4 is a measurement result of the sheet before the discoloration evaluation for the sterilizing liquid is performed.
The evaluation of bare foot warmth, foot feel, drainage, anti-slip, cleanability and embossability was all good.

<Method and criteria for evaluating discoloration for disinfectant solution>
The sheet | seat produced in Examples 7-9 was immersed in the chlorine-type disinfection liquid which diluted sodium dichloroisocyanurate which is a disinfection disinfectant with water, and was adjusted to 10 weight% for 30 days.
At this time, the surface of the sheet before and after the immersion was measured with a spectrocolorimeter, and ΔE ^* ab value = [(ΔL ^* ) ² + (Δa ^* ) ² + (Δb ^* ) ² ] ^1/2 was calculated.
ΔE ^* ab value is 5.0 or less: discoloration is not noticeable ○
ΔE ^* ab value is larger than 5.0: Discoloration is conspicuous ×

[Comparative Examples 7 to 10]
Sheets were prepared in the same manner as in [Examples 7 to 9] except that the pigments shown in Table 4 were used. The evaluation results are shown in Table 4. In Comparative Examples 7 to 9, since the discoloration was noticeable as a result of the discoloration evaluation for the sterilizing and disinfecting solution, the solar reflectance was not measured.

酸化チタン系顔料：ＴｉＯ_２
縮合系アゾ顔料：ジアゾイエロー
酸化鉄系顔料：ポリアゾレッド
縮合多環系顔料：イソインドリノン系イエロー
複合酸化物系１：ブルー（ＣｏＯ−Ａｌ_２Ｏ_３）
複合酸化物系２：亜鉛鉄クロムブラウン
ピロリン酸系：マンガンバイオレット

Titanium oxide pigment: TiO ₂
Condensed Azo Pigment: Diazo Yellow Iron Oxide Pigment: Polyazo Red Condensed Polycyclic Pigment: Isoindolinone Yellow Composite Oxide System 1: Blue (CoO-Al ₂ O ₃ )
Complex oxide system 2: Zinc iron chromium brown Pyrophosphate system: Manganese violet

  The thermoplastic resin floor sheet of the present invention suppresses the rise of the surface temperature of the floor sheet due to sunlight, does not feel hot even when walking or walking on the floor sheet with bare feet, anti-slip, drainage, cleanability It has excellent embossability, and it is difficult to discolor over a long period of time even when exposed to a sterilizing and disinfecting solution. It can be widely used on the veranda of objects, outer corridors, stairs, rooftops, etc.

1 Heat insulation floor sheet made of thermoplastic resin 1a Surface layer 1b Back layer 1b1 Back layer 1
1b2 Back layer 2
2 Convex part 2a Convex part upper surface 2b Convex part side surface 3 Surface layer 4 Base material layer 5 Part which does not form a convex part

Claims (2)

A thermoplastic resin floor sheet having a surface layer having a solar reflectance of 40 to 80% in a wavelength region of 300 to 2100 nm, wherein the surface layer is selected from condensed azo-based, iron oxide-based, and complex oxide-based materials Any one or more coloring pigments are contained, a plurality of convex portions are formed on the surface of the surface layer, and the upper area of the convex portion is 3.0 to 10.0 mm ² , and is adjacent to one convex portion. Poolside thermoplastics characterized in that the distance from other convex portions is 1.0 to 3.0 mm, and the height of the convex portions on the surface of the surface layer is 0.7 to 1.5 mm. Resin heat insulation floor sheet. In a 30-day immersion test of a 10% by weight disinfectant solution, the CIE-L * a * b * color system of the surface layer before and after the thermoplastic resin floor sheet was immersed in a chlorine-based disinfectant solution for 30 days 2. The thermal insulation floor sheet made of thermoplastic resin for poolside according to claim 1, wherein the color difference ΔE * ab value is 5.0 or less.

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