JP6423136B2 - Floor sheet and floor material using the same - Google Patents

Description

  The present invention relates to a floor sheet and a floor material using the same.

  Conventionally, a polyvinyl chloride resin sheet has been widely used as a constituent material of a resin-made decorative sheet. However, since a polyvinyl chloride resin releases a chlorine-based gas having a large environmental burden during incineration, From the point of view, instead of polyvinyl chloride, polyolefin resins and the like that are free from the risk of release of chlorine gas during incineration have been used.

  As such a decorative sheet, a decorative sheet is known in which a transparent resin layer is laminated on a base sheet and a synthetic resin layer (backer layer) is laminated below the base sheet (see, for example, Patent Document 1). . Moreover, it has the decorative sheet intermediate body in which 1 or 2 or more layers are laminated | stacked on the front surface of the base material sheet, and the synthetic resin backer layer on the back surface of the base material sheet, and the synthetic resin backer layer is A decorative sheet for flooring that includes a foam layer is also disclosed (see, for example, Patent Document 2).

  When used for flooring, the backer layer has a role as a reinforcing layer for imparting hardness and strength to the decorative sheet for flooring, and unevenness inevitably present on the surface of the adherend is a decorative material for flooring. It gives performance to alleviate the appearance effect on the sheet surface and cushioning performance to the decorative sheet for flooring. It is used as flooring decorative material by sticking the backer layer side to various adherends. It has been.

  These decorative sheets are commonly used for vertical surfaces such as decorative sheets with no backer layer, for example, wall surfaces, joinery, and edges around joinery. There is a difficulty of being bulky. Specifically, when these decorative sheets are used on a horizontal surface, for example, flooring, foreign matter tends to accumulate on the horizontal construction surface (adhered body) compared to the vertical surface, and the construction surface (adhered body) before construction. ) To remove the foreign matter, and then apply a decorative sheet to the adherend. However, even if sufficient cleaning is performed, foreign matter such as small wood chips and stones may inevitably be caught between the adherend and the decorative sheet for flooring. However, there is a problem that the part enveloping foreign matter rises in a pyramid shape and remains on the floor surface as a projection defect, which significantly impairs the aesthetic appearance. In floor construction, the adherend and floor sheet There is a demand for the development of a floor sheet in which foreign matter traces are not noticeable on the floor surface even when small foreign matter is inevitably generated during the period.

JP 2008-238728 A JP 2010-106654 A

  Accordingly, the present invention has been made to solve the above-described problems, and the object of the present invention is to provide a floor sheet in which foreign matter traces are not noticeable even if foreign matter is caught between the adherend and the floor sheet. And providing a flooring using the same.

  As a result of intensive studies to achieve the above-mentioned object, the present inventor has focused on the size of the foreign matter, and determined that the size of the foreign matter causing the occurrence of the foreign matter trace is 0.8 mm in maximum diameter, The present inventors have found that the above object can be achieved by laminating a specific backing sheet on a floor sheet, and have completed the present invention.

In order to achieve the above object, the present invention according to claim 1 is a floor sheet in which a backing sheet is laminated on a base sheet , further comprising an adhesive layer on the back surface of the backing sheet. A backing substrate is laminated, the backing sheet has a thickness of 2.0 mm or less , and a compression tester specified in JIS B 7721 is used. When the steel sheet is placed horizontally so as to be on the side and a steel cylindrical jig having a diameter of 0.8 mm is pressed against the surface of the backing sheet at a speed of 0.5 mm per minute, and the backing sheet is recessed by 0.8 mm from the surface. The floor sheet is characterized in that no load of foreign matter is observed on the floor surface when a foreign matter entrapment test is performed under the following conditions .
(Foreign object engagement test)
About 2.5g per 90cm x 180cm floor area is removed by using 0.5 to 0.8mm of silica sand as a foreign material, sorted by sieving on the floor surface of P tile, removing the peeling base material of the floor sheet and exposing The surface of the pressure-sensitive adhesive layer is pressure-bonded using a roll-type crimping tool that can be rotated on the floor surface on which silica sand is dispersed, and visually inspected for the presence of foreign matter traces due to the inclusion of foreign matter on the floor surface.

Further, the present invention according to claim 2 is a floor sheet in which a backing sheet is laminated on a base sheet , further comprising a pressure-sensitive adhesive layer and a release substrate laminated on the back surface of the backing sheet, The base sheet includes a base layer and a backer layer between the base layer and the backing sheet, the thickness of the backing sheet is 2.0 mm or less , and the compression defined in JIS B 7721 Using a testing machine, place the base sheet side of the floor sheet horizontally on the iron base so that the base side is the base side, and attach the steel cylindrical jig with a diameter of 0.8 mm at a speed of 0.5 mm per minute. The load when the backing sheet is depressed by 0.8 mm from the surface when pressed against the surface of the sheet is 300 g or less , and when a foreign object penetration test is performed under the following conditions, no foreign object trace is observed on the floor surface. Floor floor It is.
(Foreign object engagement test)
About 2.5g per 90cm x 180cm floor area is removed by using 0.5 to 0.8mm of silica sand as a foreign material, sorted by sieving on the floor surface of P tile, removing the peeling base material of the floor sheet and exposing The surface of the pressure-sensitive adhesive layer is pressure-bonded using a roll-type crimping tool that can be rotated on the floor surface on which silica sand is dispersed, and visually inspected for the presence of foreign matter traces due to the inclusion of foreign matter on the floor surface.

Further, according to a third aspect of the present invention, in the floor sheet according to the first or second aspect , the backing sheet is a foam .

Moreover, this invention of Claim 4 has the surface protection layer which consists of ionizing radiation hardening type resin in the surface of the said base sheet in the sheet | seat for floors in any one of Claims 1-3 , It is characterized by the above-mentioned. Is.

Moreover, this invention of Claim 5 bonds the floor sheet in any one of Claims 1-4 to the to-be-adhered body which consists of either an inorganic nonmetallic type, a metallic type, or a plastic type. It is flooring.

The floor sheet of the present invention is a floor sheet in which a backing sheet is laminated on a base sheet, and further comprises an adhesive layer and a release substrate laminated on the back surface of the backing sheet , and the backing sheet and a thickness of 2.0mm or less, and using a compression testing machine defined in JIS B 7721, the base sheet side of the floor sheet is placed horizontally so that said platform side iron base, per minute By pressing a steel cylindrical jig with a diameter of 0.8 mm against the surface of the backing sheet at a speed of 0.5 mm, the load when the backing sheet is recessed 0.8 mm from the surface is 300 g or less, In floor construction, when sticking a floor sheet to an adherend, even if a foreign object is caught between the adherend and the floor sheet, there is an effect that the trace of the foreign object is not noticeable, and the construction is simplified. Can be achieved.

It is a layer block diagram which shows 1st embodiment of the sheet | seat for floors concerning this invention. It is a layer block diagram which shows 2nd embodiment of the sheet | seat for floors concerning this invention. It is a layer block diagram explaining the flooring using the floor sheet of the second embodiment according to the present invention.

The present invention will be described in detail below with reference to the drawings.
FIG. 1 is a layer configuration diagram showing a first embodiment of a floor sheet according to the present invention, FIG. 2 is a layer configuration diagram showing a second embodiment of the floor sheet according to the present invention, and FIG. It is a layer block diagram explaining the flooring using the floor sheet of two embodiments. In the figure, 1, 1 'is a floor sheet, 2 is an adherend, 10 is a base sheet, 11 is a base material layer, 12 is a pattern layer, 13 is a transparent resin layer, 14 is a backer layer, 20 is a backing sheet, 30 is a surface protective layer, 40 is an adhesive layer, 50 is a release substrate, E is an uneven pattern, and F is a flooring material. Show.

  FIG. 1 is a layer configuration diagram showing a first embodiment of a floor sheet according to the present invention. The floor sheet 1 has a backing sheet 20 laminated on the back surface of a base sheet 10 and surface protection on the surface of the base sheet 10. The configuration includes the layer 30. The surface protective layer 30 imparts surface physical properties such as scratch resistance, abrasion resistance, water resistance, and stain resistance required for the floor sheet, and it is preferable to provide the surface protective layer 30. Further, embossing from the surface of the surface protective layer 30 to the base sheet 10 is performed, and a concavo-convex pattern E is applied.

Next, each layer of the floor sheet 1 according to the present invention will be described with reference to FIG.
Although the laminated structure of the base sheet 10 is not limited to FIG. 1, for example, the base layer 11 has a pattern layer (solid ink layer, pattern ink layer) 12 and a transparent resin layer 13 on the base layer 11. A configuration having a backer layer 14 underneath is preferred. Hereinafter, a floor sheet using this base sheet will be described as an example. In addition, as a structural example of the base sheet 10, the base layer 11 / the pattern layer 12, the base layer 11 / the pattern layer 12 / the transparent resin layer 13, the backer layer 14 / the base layer 11 / the pattern layer 12, and the backer layer 14 / Substrate layer 11 / pattern layer 12 / transparent resin layer 13 and configurations obtained by removing the pattern layer 12 from the above configuration.

  In the floor sheet 1, the base material layer 11 used for the base sheet 10 is not particularly limited, but a synthetic resin sheet made of a thermoplastic resin is preferably used. For example, polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate. Polyester resins such as polyethylene naphthalate and polybutylene naphthalate, acrylic resins, polyolefin resins, polyvinyl chloride resins, polystyrene, acrylonitrile-butadiene-styrene copolymer resins (hereinafter referred to as “ABS resins”), polycarbonates. Examples include resins, polyamide resins, polyarylate resins, methacrylic resins, and the like. Among the synthetic resin sheets, a sheet made of a polyolefin-based resin is preferable from the viewpoints of resin versatility (cost, etc.), sheet productivity, and disposal (no generation of toxic gas even if burned).

  As the polyolefin resin, those usually used in the field of decorative sheet for building materials can be used, for example, polyethylene, polypropylene, polybutene, polymethylpentene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene. -An acrylic acid copolymer, an ethylene-propylene-butene copolymer, a polyolefin-type thermoplastic elastomer, etc. are mentioned.

  The base material layer 11 is usually a synthetic resin sheet colored using a known colorant such as an inorganic pigment or an organic pigment. The colorant is appropriately selected in consideration of the influence on the design properties of the pattern layer 12 and the concealability of each layer laminated on the back surface of the base material layer 11. Although not shown, a primer layer may be provided on one side or both sides of the base material layer 11 in order to improve the adhesion with the pattern layer 12 or the backer layer 14.

  The thickness of the synthetic resin sheet used for the base material layer 11 is usually about 20 to 300 μm, preferably about 40 to 150 μm. Moreover, additives such as fillers such as calcium carbonate and clay, flame retardants such as magnesium hydroxide, antioxidants, lubricants, and foaming agents may be blended in the synthetic resin sheet as required.

  The pattern layer 12 includes a pattern ink layer, a solid ink layer, or a pattern ink layer and a solid ink layer. The pattern layer 12 is formed by a printing method such as gravure printing, offset printing, silk screen printing, and the pattern of the pattern ink layer is, for example, a wood grain pattern, a stone pattern, a cloth pattern, a skin pattern, a geometric pattern, a character , Symbols, line drawings, various abstract patterns, and the like.

  As the ink used for the pattern layer 12, a binder and a colorant such as a pigment and a dye, an extender, a solvent, a stabilizer, a plasticizer, a catalyst, and a curing agent are appropriately mixed. The binder is not particularly limited, and examples thereof include chlorinated polyolefins such as chlorinated polyethylene and chlorinated polypropylene, polyesters, polyurethanes composed of isocyanates and polyols, polyacrylic, acrylurethanes, polyvinyl acetate, and polyvinyl chloride. , Vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl acetate-acrylic copolymer, cellulose-based, butyral-based, polystyrene-based, polyamide-based, or the like is used alone or in combination.

  The transparent resin layer 13 is made of a transparent thermoplastic resin, may be colorless and transparent, may be colored transparent by adding a colorant to the thermoplastic resin, or may be translucent.

  Specifically, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer, ethylene-propylene-butene copolymer Examples thereof include resins such as coalescence, acrylonitrile-butadiene-styrene copolymer, ionomer, acrylic acid ester, methacrylic acid ester, soft, semi-rigid or rigid polyvinyl chloride. Among the above, polyolefin resin is preferable. The transparent resin layer 13 includes various additives such as a filler, a matting agent, a flame retardant, a lubricant, an antistatic agent, an antioxidant, an ultraviolet absorber, a light stabilizer, and a radical scavenger. Also good.

  Although the thickness of the transparent resin layer 13 can be appropriately set according to demand, it is generally preferably about 10 to 400 μm, particularly about 40 to 300 μm. The transparent resin layer 13 may be a single layer, or may be a multilayer of two or more layers.

The backer layer 14 is laminated on the back surface of the base material layer 11, and when used as a flooring, reinforcement for imparting hardness and strength to the decorative sheet for flooring, mitigation of unevenness of the adherend surface, impact resistance It becomes a layer for the purpose of properties (cushioning properties).
As the backer layer 14, a resin sheet made of a thermoplastic resin is usually used. Examples of the thermoplastic resin include polyolefins such as polypropylene and polyethylene, polyacrylic, polymethylene, polymethylpentene, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyarylate, polyimide, polystyrene, Examples of the resin include polyamide, vinyl chloride, ethylene-vinyl alcohol copolymer, polyethylene naphthalate-isophthalate copolymer, and ABS. These resins can be used alone or in combination of two or more. The thickness of the backer layer is selected according to requirements, but is usually about 100 to 600 μm, preferably 150 to less than 500 μm, more preferably 200 to 450 μm, and even more preferably 250 to 400 μm. Further, the backer layer 14 may be a single layer or multiple layers. Further, the backer layer 14 can be laminated by the extrusion lamination method by hot-melt-extruding the thermoplastic resin on the base material layer 11.

  In the floor sheet 1, the backing sheet 20 is a main component of the present invention, and a synthetic resin sheet made of a thermoplastic resin is used. The backing sheet 20 of the present invention has a thickness of 2.0 mm or less and a base sheet of the floor sheet 1 on an iron table (not shown) using a compression tester (not shown) defined in JIS B 7721. 10 side (the surface protective layer 30 side in FIG. 1) is placed horizontally so that it is an iron base side, and a steel cylindrical jig (not shown) having a diameter of 0.8 mm at a speed of 0.5 mm per minute. The load when the bottom surface having a diameter of 0.8 mm is pressed substantially vertically against the surface of the backing sheet 20 and the dent depth of the backing sheet 20 reaches 0.8 mm from the surface is 300 g or less.

The backing sheet 20 is not particularly limited as long as it is a synthetic resin sheet made of a thermoplastic resin having the above characteristics, but is more preferably a foam made of a thermoplastic resin.
As the foam, any conventionally known resin foaming method can be adopted, and a thermoplastic resin is foamed. Examples of resin foaming methods include: (1) a method of impregnating a thermoplastic resin pellet or bead with a gas, heating and melting with an extruder, and foam-molding when leaving the die; (2) a thermoplastic resin pellet or A method in which beads are heated and melted in an extruder, a gas is injected and kneaded into the beads, and foam molding is performed after exiting the die. (3) A pellet or beads of thermoplastic resin containing a foaming agent is extruded. When heated and melted in the mold and discharged from the die, an unfoamed sheet is molded, and then foamed and crosslinked by post-processing by heating or electron beam irradiation. (4) Decomposed at the molding temperature of the thermoplastic resin pellets For example, a chemical foaming agent that generates gas may be mixed, heated and melted with an extruder, and foamed at the die outlet.

  Examples of the thermoplastic resin include low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, ethylene α-olefin copolymer, polymethylpentene, polybutene, ethylene-propylene copolymer, propylene- Polyolefin resins such as butene copolymers, ethylene-vinyl acetate copolymers, saponified ethylene-vinyl acetate copolymers, ethylene-ethyl acrylate copolymers and their acid-modified products, ionomer resins, or mixtures thereof Polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyarylate, polyethylene naphthalate-isophthalate copolymer, polyamide resin, polyimide resin, polystyrene resin, poly Acrylic resins, polyvinyl alcohol resins, ABS resins. Of these, polyolefin resins are preferable, and polyethylene resins are more preferable. Furthermore, a crosslinked polyethylene resin is even more preferable. An example of the crosslinking method is by electron beam irradiation.

  Examples of the foaming agent include azodicarbonamide, azobisisobutyronitrile, NN'-dinitrosopentamethylenetetramine, oxybisbenzenesulfonylhydrazide, sodium hydrogencarbonate, potassium hydrogencarbonate and the like, or acrylonitrile. A microcapsule type in which a thermally expanded gas such as hexane or isobutane is enclosed in a resin spherical shell such as benzene. The addition amount is 1 to 10 parts by weight per 100 parts by weight of the resin component.

  Even if the backing sheet 20 is a foam, it is necessary to satisfy the above characteristics, and it is naturally important that the thickness be 2 mm or less. If the thickness is thicker than this range, when it is applied to the flooring material, there will be a level difference in the seam of the floor sheet, or vibration will occur when the parting material used to eliminate the gap between the wall surface and the floor surface walks on the floor. It may propagate to the floor sheet and the parting material may move, resulting in poor flooring performance.

The foaming ratio of the foam of the backing sheet 20 is preferably 3 to 30 times. The apparent density (JIS K 7222) of the foam is preferably ³⁰ to 300 kg / m ³ . Within this range, excellent walking feeling (cushioning properties) can be obtained.
When the expansion ratio is represented by F, the expansion ratio F is, for example, cut into a cube of 1 cm square, and then the weight of the cut-out cube is measured, and the density of the thermoplastic resin before foaming is d, cubic volume V _f, when the weight of the cubes after foaming was W _f, density d _f after foaming,
d _f = Wf / V _f
Shall be expressed in F = d / d _f.

  In the floor sheet 1, the surface protective layer 30 is provided on the surface of the base sheet 10, protects the pattern layer 12 and the transparent resin layer 13 provided on the base material layer 11, and is scratch resistant and resistant as a floor sheet. It is a layer provided to have surface physical properties such as heel mark properties, and is preferably a layer obtained by crosslinking and curing an ionizing radiation curable resin composition. The ionizing radiation curable resin composition is a composition comprising an ionizing radiation curable resin that is cured by ionizing radiation such as ultraviolet rays and electron beams, and other components that are added as necessary. Here, the ionizing radiation means an electromagnetic wave or charged particle beam having an energy quantum capable of polymerizing or cross-linking molecules, and usually ultraviolet (UV) or electron beam (EB) is used. Electromagnetic waves such as X-rays and γ-rays, and charged particle beams such as α-rays and ion beams can also be used. As the ionizing radiation curable resin used for the surface protective layer 30, a conventionally known compound may be appropriately used. Specifically, it can be appropriately selected from polymerizable monomers, polymerizable oligomers or prepolymers conventionally used as ionizing radiation curable resin compositions. Various additives can be blended in the ionizing radiation curable resin composition depending on the desired physical properties of the obtained surface protective layer. The thickness of the surface protective layer after curing is usually 1 to 40 μm, preferably 5 to 20 μm, more preferably 10 to 20 μm.

  In the floor sheet 1, each layer is laminated by, for example, sequentially forming a pattern layer (solid ink layer, pattern ink layer) on one surface of the base material layer, and then forming a two-component curable urethane resin or the like on the pattern layer. A transparent resin layer can be laminated by a dry lamination method, a T-die extrusion method, or the like through a known dry lamination adhesive, and a surface protective layer can be formed. Then, a floor sheet is obtained by laminating a backer layer on the other surface of the base material layer by a dry lamination method, a T-die extrusion method or the like via a known dry lamination adhesive such as a two-component curable urethane resin. It is done. Of course, the thermoplastic resin can be directly melt-extruded on the base material layer and laminated by the extrusion lamination method. This is a preferable laminating method particularly when polypropylene is used for the base material layer and the backer layer.

  Although it is not essential to form the concavo-convex pattern E by embossing as shown in FIG. 1, it is preferable to perform embossing because the design of the floor sheet is enhanced. The concavo-convex pattern E is formed by embossing from the surface protective layer side. The concavo-convex pattern can be formed by heating press, hairline processing or the like. Examples of the concavo-convex pattern E include a conduit groove, a stone plate surface unevenness, a cloth surface texture, a satin texture, a grain, a hairline, and a striated groove.

  FIG. 2 is a layer configuration diagram showing the second embodiment of the floor sheet according to the present invention, and the floor sheet 1 ′ of the second embodiment is the back surface of the backing sheet 20 of the floor sheet 1 of the first embodiment. In addition, the pressure-sensitive adhesive layer 40 and the peeling substrate 50 are further laminated. Others are the same as those of the first embodiment, and the same reference numerals are given and description thereof is omitted.

The pressure-sensitive adhesive that forms the pressure-sensitive adhesive layer 40 laminated on the floor sheet 1 ′ of the second embodiment can be used regardless of whether it is a solvent type or an emulsion type, and is a hot melt type or ionizing radiation curable resin. Can also be used. Specific materials for the resin forming the adhesive layer 40 include, for example, rubber resins such as polyisoprene rubber, acrylic resins such as (meth) acrylic ester resins, polyvinyl ether resins, and polyvinyl acetate resins. Suitable tackifier for any adhesive such as resin, vinyl chloride vinyl acetate copolymer resin, polystyrene resin, polyester resin, polyamide resin, polychlorinated olefin resin, polyvinyl butyral resin, for example, rosin , Dammar, polymerized rosin, partially hydrogenated rosin, ester rosin, polyterpene resin, modified terpene, petroleum resin, cyclopentadiene resin, phenol resin, styrene resin, xylene resin, phenol resin, styrene resin , Xylene-based resin, coumarone-indene-based resin, etc. were added in appropriate amounts And than can be further optionally, softeners, fillers, also anti-aging agent is added.
Moreover, the thickness of the adhesive layer 40 is 20-100 micrometers, Preferably it is 30-60 micrometers.

As the peeling substrate 50 used for the floor sheet 1 ′ of the second embodiment, the surface is peel-treated resin sheet such as polyethylene terephthalate and polypropylene, paper, and laminated paper in which polyethylene resin is laminated on the front and back of the paper. It can be used in various ways. The thickness of the resin sheet of the peeling substrate 50 is 10 to 200 μm. For laminated paper, laminated thickness 10μm~30μm polyethylene or the like using a basis weight 50g / m ² ~200g / m ² about quality paper. The peeling treatment method can be formed by coating the surface with a fluorine resin, silicone, melamine, polyolefin, ionizing radiation curable resin, or the like.

Next, a method for manufacturing the floor sheet 1 ′ of the second embodiment will be described.
First, the floor sheet 1 of the first embodiment in the form of a winding and the release substrate 50 in the form of a winding are prepared. After forming an adhesive layer on the release-treated surface of the release substrate 50 using a coating method such as gravure coating, roll coating, knife coating, comma coating, fountain coating, etc., the adhesive layer side and a wound floor The pressure-sensitive adhesive layer 40 is formed by pressure-bonding the backing sheet 1 to the backing sheet 20 side with at least two pressure-bonding laminating rolls to produce a wound floor sheet 1 ′. Thereafter, the sheet is cut into a predetermined width and a predetermined length according to a request, and is cut into a single sheet or a small roll. In addition, when the pressure-sensitive adhesive used is a solvent-based or aqueous emulsion system, the pressure-sensitive adhesive lamination is performed after applying the pressure-sensitive adhesive and then drying by heating to volatilize the solvent or water. In the case of the hot melt type, a pressure laminating is performed simultaneously with application by a heat application system such as a T die.

  FIG. 3 is a layer configuration diagram illustrating a floor material F using the floor sheet 1 ′ of the second embodiment according to the present invention, and the floor material F of the present invention is a floor sheet 1 ′ of the second embodiment. The peeling substrate 50 is peeled off, and the surface of the pressure-sensitive adhesive layer 40 is laminated on the adherend 2 and bonded together.

  According to the floor sheet 1 ′ of the second embodiment, it is not necessary to apply an adhesive or an adhesive to the adherend at the construction site, so that a wide construction area can be constructed in a short time. There is no generation of solvent from the adhesive, so there is no contamination of the field environment. The floor sheet 1 ′ of the second embodiment can be easily constructed, and is particularly suitable for floor refurbishment. Further, the floor sheet 1 ′ can be placed on the floor sheet without peeling off the floor sheet before refurbishment. 1 'can be stacked and pasted together, and the floor can be easily renewed.

  The material of the adherend 2 of the floor material F is not limited, and examples thereof include inorganic non-metallic materials, metallic materials, and plastic materials. That is, the floor sheet of the present invention is more suitable for non-residentials mainly made of inorganic non-metallic materials, metallic materials, plastics, etc. than for residential ones mainly made of wooden adherends.

  Examples of inorganic non-metallic materials include non-ceramic ceramic materials such as concrete, mortar, gypsum, and gypsum slag, and ceramic materials such as earthenware, ceramics, porcelain, and glass.

  In a metal system, metal materials (metal steel plate), such as iron, aluminum, and copper, are mentioned, for example.

In the plastic system, for example, resin materials such as polypropylene, ABS resin, phenol resin, and vinyl chloride can be used.
Further, the adherend may be vinyl chloride, a cushion floor, or a composite tile.

  Although not shown, when the floor sheet 1 according to the first embodiment is laminated on the adherend 2 to form a flooring, an adhesive or an adhesive is applied onto the adherend 2. Then, the surface of the backing sheet 20 is overlapped and bonded to the adhesive application surface to form a flooring.

  Examples of the adhesive used include urethane, epoxy, polyvinyl acetate, polyvinyl chloride, vinyl chloride / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ionomer, butadiene / acrylonitrile rubber, and neoprene rubber. And an adhesive containing natural rubber as an active ingredient. As the adhesive, those described in the second embodiment can be used.

Next, an example is given and explained in detail.

(Production of floor sheet intermediate)
A colored polypropylene film having a thickness of 60 μm with corona discharge treatment on both sides is used as a base layer 11, and a gravure printing ink using an acrylic-urethane resin as a binder on one side of the colored polypropylene film by a gravure printing method, The abstract pattern was overprinted to form the pattern layer 12.

  Next, a transparent polypropylene film having a thickness of 80 μm and subjected to corona discharge treatment on both sides is used as the transparent resin layer 13, and a transparent polypropylene film is formed on the pattern layer 12 by a dry lamination method using a urethane two-component curable dry laminate adhesive. Films were laminated.

  Then, a primer of an acrylic-urethane resin was applied on the transparent polypropylene film by a gravure printing method to form a surface protective layer primer layer (not shown). Subsequently, a urethane acrylate electron beam curable resin was applied and dried by a roll coating method on the surface protective layer primer layer to form an uncured transparent electron beam curable resin layer. Thereafter, the uncured resin layer was irradiated with an electron beam to cure the resin to form a surface protective layer 30 made of an electron beam curable resin having a thickness of 15 μm.

  Next, embossing was performed from the transparent surface protective layer 30 side using a rotary embossing machine, and an uneven pattern E was formed on the surface protective layer 30 and the transparent resin layer 13.

  Then, a polypropylene resin was melt-extruded on the surface opposite to the surface on which the colored polypropylene pattern layer 12 was laminated, and a backer layer 14 made of a polypropylene resin having a thickness of 250 μm was formed and laminated. A floor sheet intermediate in which the surface protective layer 30 is laminated on the surface of the base sheet 10 (backer layer / base material layer / pattern layer / transparent resin layer) before the backing sheet 20 is laminated as described above is produced. did. In addition, the uneven | corrugated pattern formed by embossing was made into the wood grain conduit | pipe about 30 micrometers in uneven | corrugated depth.

[Example 1]
As the backing sheet 20, a polyethylene resin foam having a thickness of 1.9 mm and a foaming ratio of 5 times is used, and pasted on the backer layer 14 side of the above floor sheet intermediate through a strong adhesive acrylic adhesive having a thickness of 40 μm. In addition, a floor sheet 1 was obtained.
Thereafter, using a polyethylene terephthalate having a thickness of 50 μm subjected to a release treatment as the release substrate 50, a solvent-based acrylic ester resin adhesive is applied to the release-treated surface with a roll coater, followed by drying by heating to a thickness of 40 μm. The pressure-sensitive adhesive layer was formed, and the pressure-sensitive adhesive layer and the backing sheet 20 of the floor sheet 1 were pressure-bonded to form the pressure-sensitive adhesive layer 40, and the floor sheet 1 was laminated to prepare a floor sheet 1 ′.

[Example 2]
A floor sheet 1 ′ was obtained in the same manner as in Example 1, except that a polyethylene resin foam having a thickness of 1.0 mm and a foaming ratio of 5 times was used instead of the backing sheet of Example 1.

[Example 3]
A floor sheet 1 ′ was obtained in the same manner as in Example 1, except that a polyethylene resin foam having a thickness of 1.9 mm and a foaming ratio of 10 times was used instead of the backing sheet of Example 1.

[Example 4]
A floor sheet 1 ′ was obtained in the same manner as in Example 1, except that a polyethylene resin foam having a thickness of 1.0 mm and a foaming ratio of 10 times was used instead of the backing sheet of Example 1.

[Comparative Example 1]
A floor sheet was obtained in the same manner as in Example 1 except that the backing sheet 20 of Example 1 was omitted.

[Comparative Example 2]
A floor sheet 1 ′ was obtained in the same manner as in Example 1 except that a polyethylene resin foam having a thickness of 1.0 mm and a foaming ratio of 2 was used instead of the backing sheet of Example 1.

[Comparative Example 3]
A floor sheet 1 ′ was obtained in the same manner as in Example 1 except that a polyethylene resin foam having a thickness of 3.0 mm and a foaming ratio of 10 times was used instead of the backing sheet of Example 1.

The following evaluation was performed about the sheet | seat for floors produced in Examples 1-4 and Comparative Examples 1-3.
(Load when the backing sheet is recessed 0.8mm from the surface)
The load when the backing sheet was recessed 0.8 mm from the surface (hereinafter referred to as a load test) was measured using a compression tester (manufactured by A & D Co., Ltd.) defined in JIS B 7721. Cut the floor sheet into 10cm squares, peel off the release substrate and remove the adhesive layer as the test sample, and place it horizontally on the iron base so that the base sheet side of the floor sheet is the base side. Put. When a steel cylinder jig with a diameter of 0.8 mm is lowered to a load cell with a maximum load of 5 kg installed above the floor sheet, the bottom surface of the steel cylinder jig with a diameter of 0.8 mm is substantially perpendicular to the floor sheet. The bottom of the steel cylinder jig is pressed against the surface of the backing sheet by lowering the load cell attached with the steel cylinder jig at a speed of 0.5 mm per minute so that the dent depth of the backing sheet is reduced. The load when reaching 0.8 mm from the surface was measured.

(Foreign object engagement test)
About 2.5 g per 90 cm × 180 cm floor area was sprayed with silica sand having a size of 0.5 to 0.8 mm selected by sieving on the floor surface of the P tile. Then, using the floor sheets prepared in Examples 1 to 4 and Comparative Examples 1 to 3, the peeling base material is removed, and the roll-type crimping tool that can be rotated by overlapping the exposed surface on the floor surface on which silica sand is dispersed. The floor was crimped using The appearance of foreign matter traces due to the inclusion of foreign matter on the floor surface was visually inspected. The case where a noticeable foreign matter trace was recognized was evaluated as x, the case where a slight noticeable foreign matter trace was observed was evaluated as Δ, and the case where a conspicuous foreign matter trace was not observed was evaluated as good. In addition, the silica sand used for the foreign material is first passed through a sieve of 0.8 mm mesh to obtain a silica sand of 0.8 mm or less, then passed through a sieve of 0.5 mm mesh, and the silica sand remaining on the sieve is 0.5 to It was produced as silica sand having a size of 0.8 mm.

  Next, the peeling base material of the floor sheet prepared in Floor Examples 1 to 4 and Comparative Examples 1 to 3 is peeled to expose the pressure-sensitive adhesive layer, and the exposed pressure-sensitive adhesive layer surface is a P tile (scale angle) having a thickness of 2 mm. A caster test was carried out as a flooring performance using a sample that had been laminated and pressure-bonded as a flooring material. The specimen was seamed with a floor sheet. The seam was formed by using two floor sheets having a size about half that of the P tile divided in a direction perpendicular to one side of the P tile, butting them in the center of the P tile.

(Caster test)
Each specimen was evaluated by performing a test based on JIS A1454 using a floor material fatigue tester (Miyano Medical Instrument Co., Ltd., caster tester). Although not shown, the floor material fatigue tester is not shown, but includes a loader, an adjustment handle, a disk-shaped caster fixing base, three casters attached to the peripheral end of the disk-shaped caster fixing base, and a specimen fixing base. (Made of iron). The three casters are provided at positions that divide the periphery of the caster fixing base into approximately three equal parts. The caster used is a nylon wheel having a diameter of 46 mm and a width of 20 mm.

A sample of a horizontal angle is fixed horizontally on the sample fixing base, a weight of 60 kg is put on the weighted portion, a load is applied, and three casters are brought into contact with the surface of the sample on the floor sheet side by an adjustment handle, The caster fixing base was rotated at a speed of 20 rpm for 50 minutes, for a total of 1000 rotations. The rotation direction was reversed every 5 minutes.
Then, the amount of dents on the specimen surface was measured with a dial depth gauge (manufactured by Ozaki Mfg. Co., Ltd.) and the appearance of the surface was visually inspected.

  The evaluation results of Examples 1 to 4 are shown in Table 1, and the evaluation results of Comparative Examples 1 to 3 are shown in Table 2.

  As shown in Table 1, in Examples 1 to 4, the measured value of the load test (the load when the backing sheet is recessed by 0.8 mm from the surface) is 300 g or less, and the foreign matter trace is also noticeable in the foreign matter entrapment test. Good and beautiful appearance was obtained. Also, the caster test was good, and no blur or peeling was observed. In Comparative Example 3, the load test and the foreign object penetration test were good, but in the caster test, the floor sheet peeled off and was not suitable as a flooring material.

DESCRIPTION OF SYMBOLS 1, 1 'Floor sheet 10 Base sheet 11 Base material layer 12 Picture layer 13 Transparent resin layer 14 Backer layer 20 Backing sheet 30 Surface protective layer 40 Adhesive layer 50 Peeling base material 2 Substrate E Concavity and convexity F Floor material

Claims (5)

A floor sheet in which a backing sheet is laminated on a base sheet,
The back surface of the backing sheet is further laminated with an adhesive layer and a release substrate,
The thickness of the backing sheet is at 2.0mm or less,
In addition, using a compression tester specified in JIS B 7721, the base sheet side of the floor sheet is placed horizontally on the iron base so as to be the base side, and the diameter is 0.8 mm at a speed of 0.5 mm per minute. of load when said backing sheet is recessed 0.8mm from the surface of the steel cylinder jig pressed against the surface of the backing sheet is not more than 300 g, when the foreign substance involved in depressed test under the following conditions, foreign objects on the floor surface No trace is recognized,
A floor sheet characterized by that.
(Foreign object engagement test)
About 2.5g per 90cm x 180cm floor area is removed by using 0.5 to 0.8mm of silica sand as a foreign material, sorted by sieving on the floor surface of P tile, removing the peeling base material of the floor sheet and exposing The surface of the pressure-sensitive adhesive layer is pressure-bonded using a roll-type crimping tool that can be rotated on the floor surface on which silica sand is dispersed, and visually inspected for the presence of foreign matter traces due to the inclusion of foreign matter on the floor surface. A floor sheet in which a backing sheet is laminated on a base sheet,
The back surface of the backing sheet is further laminated with an adhesive layer and a release substrate,
The base sheet comprises a base layer, and a backer layer between the base layer and the backing sheet,
The thickness of the backing sheet is 2.0 mm or less ,
In addition, using a compression tester specified in JIS B 7721, the base sheet side of the floor sheet is placed horizontally on the iron base so as to be the base side, and the diameter is 0.8 mm at a speed of 0.5 mm per minute. of load when said backing sheet is recessed 0.8mm from the surface of the steel cylinder jig pressed against the surface of the backing sheet is not more than 300 g, when the foreign substance involved in depressed test under the following conditions, foreign objects on the floor surface No trace is recognized,
A floor sheet characterized by that.
(Foreign object engagement test)
About 2.5g per 90cm x 180cm floor area is removed by using 0.5 to 0.8mm of silica sand as a foreign material, sorted by sieving on the floor surface of P tile, removing the peeling base material of the floor sheet and exposing The surface of the pressure-sensitive adhesive layer is pressure-bonded using a roll-type crimping tool that can be rotated on the floor surface on which silica sand is dispersed, and visually inspected for the presence of foreign matter traces due to the inclusion of foreign matter on the floor surface. The floor sheet according to claim 1 or 2, wherein the backing sheet is a foam. The floor sheet according to any one of claims 1 to 3, further comprising a surface protective layer made of an ionizing radiation curable resin on the surface of the base sheet. The flooring material which bonds the sheet | seat for floors in any one of Claims 1-4 to the to-be-adhered body which consists of either an inorganic nonmetallic type, a metallic type, or a plastic type .

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