JP2018183962A - Method for producing embossed decorative sheet for floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing an embossed decorative sheet for floor which is excellent in caster resistance and impact resistance, and is excellent in reproducibility, weather resistance and flexibility of embossment.SOLUTION: There is provided a method for producing a decorative sheet 30 in which a pattern layer 20, an adhesive layer 21, a transparent thermoplastic resin layer and a surface protective layer 24 are layered in this order on a thermoplastic resin base material sheet 16, and an adhesive layer 17 and backer layers 18 and 19 are provided in this order on a rear face of the base material sheet, the backer layers 18 and 19 are formed by forming the adhesive layer 17 on a rear face of the base material sheet and then extrusion-laminating a plurality of layers 18 and 19 containing a molten thermoplastic resin, then the pattern layer 20 is formed on the surface of the base material sheet 16 by printing, the adhesive layer 17 is formed thereon, then the transparent thermoplastic resin layers 22 and 23 are formed by extrusion-molding a plurality of layers 22 and 23 containing the molten transparent thermoplastic resin, and embossment is performed.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an embossed decorative sheet having a printed pattern and an embossed pattern and a method for producing the same, and more particularly to a method for producing an embossed decorative sheet for flooring that is required to have excellent properties such as caster resistance and impact resistance. .

  Conventionally, as an embossed decorative sheet for floors used for such applications, a method is known in which a backer layer is further provided on the back surface of a base material sheet to increase the thickness of the entire sheet (reference document 1, etc.). As a method for producing a backer layer, a method of laminating a sheet to be a backer layer and a substrate sheet by dry lamination is general, but there is a limit to the production speed, and further, defects at the time of lamination are likely to occur. Not very suitable for mass production.

  Attempts have been made to increase the thickness of the transparent thermoplastic resin layer on the base sheet without forming a backer layer (eg, Reference 2), but the production rate is limited because of the formation of a thick resin layer. Furthermore, if the transparent thermoplastic resin layer is too thick, the pattern layer is difficult to see, and there is a problem in terms of design.

  Attempts have also been made to form a backer layer on the back of the embossed decorative sheet by extrusion of molten resin, but since the molten resin is hot, high temperature heat is applied to the base sheet side, so embossing on the embossed decorative sheet surface There arises a problem that the shape disappears due to heat.

JP 2003-239517 A JP 2005-290568 A

  The present invention has been made in order to solve such problems, and the object of the present invention is excellent in caster resistance, impact resistance, and emboss reproducibility, weather resistance, flexibility, and the like. It is providing the manufacturing method of the embossing decorative sheet for floors.

As means for solving the above-mentioned problems, the invention according to claim 1 includes a pattern layer, an adhesive layer, a transparent thermoplastic resin layer, and a surface protective layer in this order on the thermoplastic resin base sheet. A method for producing a decorative sheet that is laminated and an adhesive layer and a backer layer are applied in this order on the back surface of the thermoplastic resin base sheet,
The backer layer is formed by forming an adhesive layer on the back surface of the thermoplastic resin base sheet, and then extruding a plurality of layers containing a molten thermoplastic resin on the adhesive layer from a multilayer extruder. Formed by
Thereafter, a pattern layer is formed by printing on the surface of the thermoplastic resin substrate sheet, an adhesive layer is formed thereon, and then a molten transparent thermoplastic resin is included on the adhesive layer. Embossing for floors, wherein a plurality of layers are extruded from a multilayer extruder and laminated to form a transparent thermoplastic resin layer, and at the same time, an embossed shape is formed by embossing the transparent thermoplastic resin layer It is a manufacturing method of a decorative sheet.

In the invention described in claim 2, the transparent thermoplastic resin layer is different from the first resin in the second layer different from the first resin-containing layer from the thermoplastic resin base sheet side. And the second resin layer has a tensile elongation of 50 to 700% and a tensile elastic modulus of 2000 to 10000 kgf / cm ^2. It is a manufacturing method of the embossing decorative sheet for floors of Claim 1.

In the invention according to claim 3, the first resin is a layer comprising transparent maleic acid-modified polypropylene,
3. The method for producing an embossed decorative sheet for floor according to claim 2, wherein the second resin is a layer comprising one of transparent polypropylene, an ultraviolet absorber, and a light stabilizer, or a composite thereof. is there.

  The invention according to claim 4 is the method for producing an embossed decorative sheet for floor according to claim 3, wherein the light stabilizer contained in the second resin is an amine light stabilizer. is there.

  The invention according to claim 5 is the method for producing an embossed decorative sheet for floor according to claim 3, wherein the light stabilizer contained in the second resin is an amino ether type light stabilizer. It is.

In the invention according to claim 6, the backer layer includes, from the thermoplastic resin base sheet side, a layer containing the first resin and a second resin different from the first resin. And the layers including them are laminated in this order,
The method for producing an embossed decorative sheet for floor according to any one of claims 1 to 5, wherein the first resin is a layer comprising maleic acid-modified polypropylene.

  The invention according to claim 7 is characterized in that the backer layer has a thickness of 100 μm or more, and the embossed decorative sheet has a thickness of 250 μm or more. It is a manufacturing method of the embossing decorative sheet for floors.

  In the invention according to claim 8, the surface protective layer is made of a thermosetting resin, an ionizing radiation curable resin, or a composite thereof, and further contains either an ultraviolet absorber or a light stabilizer or a composite thereof. It is a manufacturing method of the embossing decorative sheet for floors in any one of Claims 1-7 characterized by these.

  The invention according to claim 9 is the method for producing an embossed decorative sheet for floor according to claim 8, wherein the light stabilizer contained in the surface protective layer is an amine light stabilizer. .

  The invention according to claim 10 is the method for producing an embossed decorative sheet for floor according to claim 8, wherein the light stabilizer contained in the surface protective layer is an amino ether type light stabilizer. is there.

  In order to solve this problem, the present invention forms a plurality of layers containing a molten thermoplastic resin on a multilayer extruder after forming an adhesive layer on the back surface of a thermoplastic resin base sheet. A backer layer is formed by extruding and laminating, and then a pattern layer is formed by printing on the surface of the thermoplastic resin base sheet, and an adhesive layer is formed thereon, and then the adhesive layer A plurality of layers comprising a melted transparent thermoplastic resin are extruded from a multilayer extruder and laminated to form a transparent thermoplastic resin layer, and at the same time embossing the transparent thermoplastic resin layer By forming the embossed shape, the production speed of the backer layer can be increased and embossing with excellent reproducibility can be applied to the surface side.

The transparent thermoplastic resin layer includes, from the thermoplastic resin base sheet side, a layer containing a first resin and a layer containing a second resin different from the first resin. The second resin layer is formed by being laminated in this order, and the second resin layer has a tensile elongation of 50 to 700% and a tensile elastic modulus of 2000 to 10,000 kgf / cm ² , so that cutting / cutting workability and low-temperature bending processing are performed. It is possible to improve the property.

In addition, the first resin is a layer containing transparent maleic acid-modified polypropylene, and the second resin is a layer containing one or a combination of transparent polypropylene, an ultraviolet absorber and a light stabilizer. Thus, the first layer can improve the adhesiveness with the thermoplastic resin base layer, and the second layer is a layer comprising transparent polypropylene, an ultraviolet absorber, a light stabilizer, or a composite thereof. By exhibiting an effect of embrittlement resistance inside the resin, it becomes possible to express further weather resistance. Also, by using the light stabilizer contained in the second resin as an amine-type light stabilizer. The oxidized form of nitroxy radicals captures the radicals, and the nitroxy radicals are regenerated via alkoxyamines, so that they work effectively for a long time. It is preferable for use in a decorative sheet used.

  In addition, since the light stabilizer contained in the second resin is an amino ether type light stabilizer, the neutralization reaction due to acid does not occur, so that it is exposed to acidic substances such as acidic detergents, insecticides, and acid rain. However, the weather resistance does not deteriorate and the effect can be expressed for a long time.

  Further, the backer layer includes a layer containing a first resin and a layer containing a second resin different from the first resin in this order from the thermoplastic resin base sheet side. By forming the first resin into a layer containing maleic acid-modified polypropylene, the first layer can improve the adhesiveness with the thermoplastic resin base layer.

  Also, it is possible to provide a floor embossed decorative sheet that is more suitable for caster resistance and impact resistance when the thickness of the backer layer is 100 μm or more and the thickness of the embossed decorative sheet is 250 μm or more. It becomes possible.

  Further, the surface protective layer is made of a thermosetting resin, an ionizing radiation curable resin, or a composite thereof, and further includes either an ultraviolet absorber and a light stabilizer, or a composite thereof, so that the surface strength and post-processability can be improved. Can be balanced. Furthermore, by adding the above ultraviolet absorber / light stabilizer, it is possible to obtain an effect on the embrittlement resistance of the surface of the film and the resin, and to obtain practical weather resistance.

  In addition, by using the light stabilizer contained in the surface protective layer as an amine-type light stabilizer, an oxidized form of the nitroxy radical captures the radical, and the nitroxy radical passes through the alkoxyamine form. Therefore, it is effective for a long period of time, so that it is preferable for use in a decorative sheet that is used for a long period of time as a building material.

  In addition, since the light stabilizer contained in the surface protective layer is an amino ether type light stabilizer, the neutralization reaction due to acid does not occur, so that it is exposed to acidic substances such as acidic detergents, insecticides, and acid rain. However, the weather resistance does not deteriorate, and the effect can be expressed for a long time.

FIG. 1 is a schematic diagram for explaining the initial process of one embodiment of the method for producing an embossed decorative sheet for floors according to the present invention. FIG. 2 is a schematic view for explaining the next process of one embodiment of the method for producing an embossed decorative sheet for floors according to the present invention. FIG. 3 is a schematic diagram for explaining the following process of one embodiment of the method for producing an embossed decorative sheet for floors according to the present invention. FIG. 4 is a schematic view for explaining an embossing process of one embodiment of the method for producing a floor embossed decorative sheet according to the present invention. FIG. 5 is a partial cross-sectional schematic view for explaining one embodiment of the method for producing a floor embossed decorative sheet according to the present invention and examples.

  Hereinafter, the present invention will be described in more detail with reference to FIGS. However, the present invention is not limited to the examples shown here. The invention is limited only by the following claims.

  As shown in FIG. 1, the present invention inserts a base sheet 1a coated with an adhesive layer between a pressure roll 3 and a pressure roll 4 and a molten thermoplastic resin layer 2 (backer layer), Bonding and cooling solidification are performed at the same time. The integrated sheet moves along the outer periphery of the pressure roll 3 and is peeled off by the peeling roll 5 to become an intermediate sheet 6.

  Further, as shown in FIGS. 2 and 3, a pattern layer is applied to the intermediate sheet 6 using a gravure roll 7 or the like on the base sheet side to form an intermediate sheet 8, and further a gravure roll 9 or the like is used thereon. Thus, an intermediate sheet 10 coated with an adhesive layer is obtained.

  Further, as shown in FIG. 4, the intermediate sheet 10 and the molten transparent thermoplastic resin layer 11 are inserted between the embossing roll 12 and the pressure roll 13, and adhesion, cooling solidification, and embossing are simultaneously performed. The integrated sheet moves along the outer periphery of the embossing roll 12 and is peeled off by the peeling roll 14 to become an embossed decorative sheet 15.

  Each of the embossing roll, the pressure roll, and the peeling roll has a cooling mechanism inside, and has the effect of lowering the temperature of the molten resin and solidifying it. Usually, the embossing roll is made of metal, and other rolls are generally made of rubber. Since the embossing roll bears most of the cooling effect, the production speed is determined by the diameter of the embossing roll. The larger the diameter, the higher the production speed, but the higher the manufacturing cost of the embossing roll, so the embossing roll diameter, production efficiency, and extruder capacity must be considered comprehensively to minimize manufacturing costs. I must.

  Moreover, you may insert the insertion position of a base material sheet between the press roll 3 and the peeling roll 5 like the base material sheet 1b shown in FIG. This method is an effective method when the thickness of the substrate is thin and the heat resistance is poor, and when the adhesiveness is sufficiently secured by the combined use of an adhesive or the like.

  An example of the structure of the embossed decorative sheet according to the present invention is shown in FIG. As the thermoplastic resin base sheet 16 in the present invention, various materials other than the vinyl chloride resin can be used. However, in view of non-pollution, price, performance, easiness of coloring, fillers and coloring pigments. A polyolefin-based material to which is added can be suitably used.

  An adhesive layer 17 is applied to the back surface of the base sheet. The adhesive is arbitrarily selected from urethane, acrylic, polyester and the like according to the combination of the transparent thermoplastic resins.

The backer layer is a sheet-like layer composed of a plurality of layers. Each layer is formed from a thermoplastic resin. As the thermoplastic resin, for example, various resins other than vinyl chloride resin are possible. Various combinations of resins in each layer are possible depending on the intended characteristics. The number of layers may be four or more, but is preferably up to three because the structure of the extruder becomes complicated and the work becomes complicated.

  In the example of FIG. 5, the backer layer includes a layer 18 including a predetermined resin (hereinafter also referred to as “first resin”) and the first resin from the thermoplastic resin base sheet 16 side. Two layers 19 of layers 19 including different resins (hereinafter also referred to as “second resins”) are laminated in this order.

  As the first resin and the second resin, for example, considering the caster resistance, the impact resistance, the bending resistance, the thermoformability, etc. of the embossed decorative sheet, and further considering the material cost, the first resin Is a layer comprising transparent maleic acid-modified polypropylene, and the second resin is preferably a layer comprising transparent polypropylene.

  A pattern layer 20 is provided on the surface of the base sheet by printing an arbitrary pattern, and an adhesive layer 21 is further applied. The adhesive is arbitrarily selected from urethane, acrylic, polyester and the like according to the combination of the transparent thermoplastic resins.

  The transparent thermoplastic resin layer is a sheet-like layer composed of a plurality of layers. Each layer is formed of a transparent thermoplastic resin through which the pattern of the pattern layer 20 can be seen. As the thermoplastic resin, for example, various resins other than vinyl chloride resin are possible. Various combinations of resins in each layer are possible depending on the intended characteristics. The number of layers may be four or more, but is preferably up to three because the structure of the extruder becomes complicated and the work becomes complicated.

  In the example of FIG. 5, the transparent thermoplastic resin layer includes a layer 22 including a predetermined resin (hereinafter also referred to as “first resin”) from the thermoplastic resin base sheet 16 side, and the first Two layers 23 including a resin different from the resin (hereinafter also referred to as “second resin”) are laminated in this order.

  As the first resin and the second resin, for example, considering the scratch resistance, weather resistance, stain resistance, light resistance, transparency, bendability, thermoformability, etc. of the surface of the embossed decorative sheet, further the material cost In view of the above, the first resin is a layer containing transparent maleic acid-modified polypropylene, and the second resin is one of transparent polypropylene, an ultraviolet absorber, a light stabilizer, or a composite thereof. A layer is preferred.

  Moreover, the ultraviolet absorber added to the transparent thermoplastic resin layer is appropriately selected from benzotriazole-based, triazine-based, benzophenone-based, and the like.

  Examples of the benzotriazole ultraviolet absorber include 2- (2-hydroxy-5-tert-butylphenyl) -2H-benzotriazole, 2- (5-methyl-2-hydroxyphenyl) benzotriazole, 2- [2-hydroxy −3,5-bis (α, α-dimethylbenzyl) phenyl] -2H-benzotriazole, 2- (3,5-di-t-butyl-2-hydroxyphenyl) benzotriazole, 2- (3-t- Butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2- (3,5-di-t-butyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2- (3,5- Di-t-amyl-2-hydroxyphenyl) benzotriazole, 2- (2′-hydroxy-5′-t-octylphenyl) benzotriazo And the like, mixtures thereof, modified products, polymers, and derivatives can be used.

Examples of triazine ultraviolet absorbers include 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-[(hexyl) oxy] -phenol, 2- [4-[( 2-hydroxy-3-dodecyloxypropyl) oxy] -2-hydroxyphenyl] -4
, 6-Bis (2,4-dimethylphenyl) -1,3,5-triazine, 2- [4-[(2-hydroxy-3-tridecyloxypropyl) oxy] -2-hydroxyphenyl] -4, 6-bis (2,4dimethylphenyl) -1,3,5-triazine, 2,4-bis (2,4-dimethylphenyl) -6- (2-hydroxy-4-iso-octyloxyphenyl) -s -Triazines and the like, mixtures thereof, modified products, polymers, and derivatives can be used.

  Furthermore, as the benzophenone-based ultraviolet absorber, octabenzone, modified products, polymers, derivatives, and the like can be used. In particular, those having a hydroxyl group are suitable as the ultraviolet absorber since bonding with a resin component by crosslinking by addition of isocyanate can be expected. The number of added parts may be set according to the desired weather resistance, but is 0.1% to 50%, preferably 1% to 30% with respect to the resin solid content.

  The light stabilizer added to the transparent thermoplastic resin layer includes bis (1,2,2,6,6-pentamethyl-4-piperidyl) [[3,5-bis (1,1-dimethylethyl)- 4-Hydroxyphenyl] methyl] butyl malonate, bis (1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, methyl (1,2,2,6,6-pentamethyl-4-poperidinyl) Sebacate, decanedioic acid bis (2,2,6,6-tetramethyl-1 (octyloxy) -4-piperidinyl) ester and the like, mixtures thereof, modified products, polymers, derivatives and the like can be used.

  The added part may be added according to the desired weather resistance, but is 0.1% by mass to 50% by mass, preferably 1% by mass to 30% by mass with respect to the resin solid content.

  Other than the above, for example, a heat stabilizer, a flame retardant, an antiblocking agent, or the like may be added. As the thermal stabilizer, pentaerythrityl-tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl)]-propionate, 2,4-bis- (n-octylthio) -6- (4 -Hydroxy-3,5-di-t-butylanilino) -1,3,5-triazine, octadecyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, 1,3,5- Trimethyl-2,4,6-tris (3,5-t-butyl-4-hydroxybenzyl) benzene, 1,3,5-tris (4-t-butyl-3-hydroxy-2,6-dimethylbenzyl) Hindered phenolic antioxidants such as isocyanuric acid, 2,2′-methylenebis (4-ethyl-6-tert-butylphenol), 2,2′-methylenebis (4-methyl-6-tert-butyl) Phenolic antioxidants such as enol), phosphorus antioxidants typified by tris (2,4-di-t-butylphenyl) phosphite, etc., and mixtures thereof, that is, one kind or two or more kinds. Combinations can be used.

  As the flame retardant, inorganic compounds such as aluminum hydroxide, magnesium hydroxide, calcium carbonate, and magnesium carbonate, phosphate ester flame retardants, and the like can be used. Furthermore, as an antiblocking agent, inorganic type antiblocking agents, such as aluminum silicate, silicon oxide, hydrotalcite, and calcium carbonate, organic type antiblocking agents, such as fatty acid amide, etc. can be used. The thickness of the transparent thermoplastic resin layer is preferably 10 μm or more and 100 μm or less.

  Hereinafter, the present invention will be described in more detail with reference to Examples 1 to 2 and Comparative Examples 1 to 4. However, the present invention is not limited to the examples shown here. The invention is limited only by the following claims. The description will be made with reference to FIG.

<Example 1>
A 70 μm polyolefin inorganic filler sheet (“OW” manufactured by Riken Technos Co., Ltd.) was used as the thermoplastic resin base sheet 16, and the urethane adhesive 17 was applied to the back side. On this adhesive, a plurality of layers comprising a molten thermoplastic resin were extruded from a multiaxial extruder with a T die and laminated to form a backer layer. As the first resin 18, maleic acid-modified polypropylene (manufactured by Riken Vitamin Co., Ltd.) was used, and as the second resin 19, polypropylene resin was used.

  At the same time, the laminate of the thermoplastic resin substrate sheet 16, the adhesive layer 17 and the thermoplastic resin layer was nipped by a rubber roll (pressure roll) to perform lamination. Here, the thickness of the first resin 18 was 10 μm, and the thickness of the second resin 19 was 90 μm.

Subsequently, a wood grain pattern was printed on the surface side of the thermoplastic resin base sheet 16 by a gravure printing method to form a pattern layer 20. Subsequently, a urethane resin adhesive was applied on the pattern layer 20 and the adhesive layer 21 was formed by hot air drying. Subsequently, a transparent thermoplastic resin layer was formed on the adhesive layer 21 by extruding and laminating a plurality of layers containing a molten transparent thermoplastic resin from a multiaxial extruder with a T-die. Transparent maleic acid-modified polypropylene (manufactured by Riken Vitamin Co., Ltd.) is used for the first resin 22, and a phenolic antioxidant (IRGANOX 1010 manufactured by Ciba Specialty Chemicals Co., Ltd.) is used for the second resin 23. ) 0.2 parts by weight, hindered amine light stabilizer (“TINUVIN622” manufactured by Ciba Specialty Chemicals Co., Ltd.) 0.3 part by weight, benzotriazole ultraviolet absorber (“TINUVIN326” manufactured by Ciba Specialty Chemicals Co., Ltd.) A resin (having a tensile elongation of 200% and a tensile elastic modulus of 5000 kgf / cm ² ) was used.

  At the same time, the laminate was nipped with a conduit embossing plate and a rubber roll (pressure roll), and embossing and lamination were performed simultaneously to obtain a floor embossed decorative sheet. Here, the thickness of the first resin was 10 μm, and the thickness of the second resin was 60 μm.

After embossing the embossed decorative sheet for flooring, surface treatment is applied to urethane resin ("URV238 varnish" manufactured by Toyo Ink Co., Ltd.) as a top coat resin and curing agent ("UR150B varnish" manufactured by Toyo Ink Co., Ltd.). ) Is added to 10 parts by weight, 0.5 parts by weight of a benzotriazole ultraviolet absorber (“TINUVIN 326” manufactured by Ciba Specialty Chemicals), and a hindered amine light stabilizer (“TINUVIN 622” manufactured by Ciba Specialty Chemicals) ) Was added by gravure coating so that the coating amount after drying was 5 g / m ² to obtain a surface protective layer 24.

<Example 2>
An embossed decorative sheet for floors was obtained in the same manner as in Example 1 except that the thickness of the second resin 19 of the backer layer was 190 μm.

<Comparative Example 1>
(After embossing, extrude the backer layer)
The embossing decorative sheet for flooring was carried out in the same manner as in Example 1 except that the order of melt extrusion / embossing was: melt extrusion of transparent thermoplastic resin layer ⇒ embossing of transparent thermoplastic resin layer ⇒ melt extrusion of backer layer Obtained.

<Comparative example 2>
(Backer is too thin)
An embossed decorative sheet for flooring was obtained in the same manner as in Example 1 except that the thickness of the first resin 18 of the backer layer was 10 μm and the thickness of the second resin 19 was 70 μm.

<Comparative Example 3>
(The tensile modulus is too high)
An embossed decorative sheet was formed in the same manner as in Example 1 except that a polypropylene resin having a tensile elongation of 120% and a tensile elastic modulus of 12000 kgf / cm ² was used for the second resin 23 of the transparent thermoplastic resin layer.

<Comparative example 4>
(The tensile modulus is too low)
An embossed decorative sheet was formed in the same manner as in Example 1 except that a polypropylene resin having a tensile elongation of 200% and a tensile elastic modulus of 1000 kgf / cm ² was used for the second resin 23 of the transparent thermoplastic resin layer.

<Evaluation items>
(1) Embossed state: It was confirmed by visual observation whether the embossed shape of the produced embossed decorative sheet for floor had disappeared due to the thermal history during sheet production.
○: Embossed shape clearly remains ×: Embossed shape disappeared

(2) Cutting property: An ethylene-vinyl acetate copolymer emulsion type adhesive was applied to a 12 mm MDF base material to obtain a decorative decorative plate bonded to the primer layer 7 side of the embossed decorative sheet 30.
The decorative board was cut with a circular saw and subjected to a cutting test in which the surface reached MDF by a hand router to confirm whether or not burrs were generated on the sheet.
○: No burr occurred ×: Burr occurred

(3) Low-temperature bendability: After engraving the V-groove reaching the embossed decorative sheet 30 from the MDF side of the decorative board, bending is performed immediately after leaving in a low-temperature environment of 5 ° C. for 3 hours, and the sheet at the bent portion The presence or absence of whitening was confirmed.
○: No whitening was observed ×: Whitening was observed

(4) DuPont impact test: The impact resistance of the produced embossed decorative sheet for floors was evaluated using a DuPont impact tester (based on JIS K 5600-5-3). Specifically, a weight having a specified weight was dropped from the height of 30 cm onto the surface of the decorative material to confirm the dent.
○: No dent is seen or slight dent ×: Clear dent remains

(5) Caster resistance test: After the caster was moved on the produced embossed decorative sheet for floor using a caster resistance tester, the dents on the decorative material were visually confirmed.
Test conditions: Use plastic casters.
25kg load, stroke 250mm, 1000 reciprocations (1 reciprocation per second)
◯: No dent is seen or slight dent. X: A clear dent remains.

<Evaluation results>
The evaluation results of Examples 1 to 2 and Comparative Examples 1 to 4 are shown in Table 1.

  From the results shown in Table 1, Example 1 and Example 2 according to the present invention are evaluated as 0 in any of the evaluation items (1) to (5), and compared with any of Comparative Examples 1 to 4. It is clear that it is excellent.

  As described above, according to the present invention, it is possible to provide a method for producing a floor embossed decorative sheet having excellent caster resistance and impact resistance, and excellent emboss reproducibility, weather resistance, flexibility, and the like. is there.

DESCRIPTION OF SYMBOLS 1a ... Base material sheet 1b ... Base material sheet 2 ... Thermoplastic resin layer 3 ... Pressure roll 4 ... Pressure roll 5 ... Peeling roll 6 ... Intermediate sheet 7 .... Gravure roll 8 ... Intermediate sheet 9 ... Gravure roll 10 ... Intermediate sheet 11 ... Transparent thermoplastic resin layer 12 ... Emboss roll 13 ... Pressure roll 14 ... Release roll DESCRIPTION OF SYMBOLS 15 ... Embossed decorative sheet 16 ... Thermoplastic resin base material sheet 17 ... Adhesive layer 18 ... Layer 19 containing a predetermined resin ... Layer containing a predetermined resin 20... Pattern layer 21... Adhesive layer 22. Layer 23 containing a predetermined resin... Layer 24 containing a predetermined resin... Surface protective layer 30.・ Embossed decorative sheet

Claims (10)

On the thermoplastic resin substrate sheet, a pattern layer, an adhesive layer, a transparent thermoplastic resin layer, and a surface protective layer are laminated in this order, and an adhesive layer on the back surface of the thermoplastic resin substrate sheet, A method for producing a decorative sheet in which the backer layer is applied in this order,
The backer layer is formed by forming an adhesive layer on the back surface of the thermoplastic resin base sheet, and then extruding a plurality of layers containing a molten transparent thermoplastic resin from the multilayer extruder on the adhesive layer. Formed by
Thereafter, a pattern layer is formed by printing on the surface of the thermoplastic resin substrate sheet, an adhesive layer is formed thereon, and then a plurality of molten thermoplastic resins are formed on the adhesive layer. Embossing for floors characterized by forming a transparent thermoplastic resin layer by extruding layers from a multilayer extruder and laminating, and simultaneously embossing the transparent thermoplastic resin layer to form an embossed shape Sheet manufacturing method. The transparent thermoplastic resin layer has a layer containing a first resin and a layer containing a second resin different from the first resin in this order from the thermoplastic resin base sheet side. The floor embossing according to claim 1, wherein the embossment for flooring is formed by being laminated, and the tensile elongation of the second resin layer is 50 to 700% and the tensile elastic modulus is 2000 to 10000 kgf / cm ^2. A method for producing a decorative sheet. The first resin is a layer comprising transparent maleic acid-modified polypropylene;
3. The method for producing an embossed decorative sheet for floor according to claim 2, wherein the second resin is a layer comprising any one of transparent polypropylene, an ultraviolet absorber and a light stabilizer, or a composite thereof.   4. The method for producing an embossed decorative sheet for floor according to claim 3, wherein the light stabilizer contained in the second resin is an amine light stabilizer.   4. The method for producing an embossed decorative sheet for floor according to claim 3, wherein the light stabilizer contained in the second resin is an amino ether type light stabilizer. The backer layer is formed by laminating a layer containing a first resin and a layer containing a second resin different from the first resin in this order from the thermoplastic resin base sheet side. Formed,
The method for producing an embossed decorative sheet for floor according to any one of claims 1 to 5, wherein the first resin is a layer comprising maleic acid-modified polypropylene.   The thickness of the said backer layer is 100 micrometers or more, and the thickness of an embossing decorative sheet is 250 micrometers or more, The manufacturing method of the embossing decorative sheet for floors in any one of Claims 1-6 characterized by the above-mentioned.   The surface protective layer is made of a thermosetting resin, an ionizing radiation curable resin, or a composite thereof, and further includes either an ultraviolet absorber and a light stabilizer or a composite thereof. A method for producing an embossed decorative sheet for floor according to claim 1.   The method for producing an embossed decorative sheet for floor according to claim 8, wherein the light stabilizer contained in the surface protective layer is an amine-type light stabilizer.   The method for producing an embossed decorative sheet for floor according to claim 8, wherein the light stabilizer contained in the surface protective layer is an amino ether type light stabilizer.