JP2001232742A - Decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative sheet having fire retardation of the same degree as that of the decorative sheet using a vinyl chloride resin and being environmentally friendly, in which scratch resistance, abrasion resistance and tensile ductility are excellent and furthermore in the case of providing a foamed resin layer, in addition to the above characteristics, the foamed resin layer (expansion efficiency is good) having a little dispersion and a nearly uniform expansion cell shape is obtained and also its surface becomes a smooth state and design properties are excellent. SOLUTION: In the decorative sheet, a fire retardant layer consisting of a non halogen thermoplastic resin, in which an additive containing at least a silicone fire retardant and an inorganic fire retardant is added, is formed at least on the base material made of paper.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet used for a wall interior of a building, a vehicle interior, and the like, and more particularly, to an environmentally friendly decorative sheet having excellent flame retardancy.

[0002]

2. Description of the Related Art Conventionally, as a decorative sheet used for the interior wall of a building or the interior of a vehicle, a resin sheet made of a vinyl chloride resin is provided on a base material, or the resin layer is foamed to form a foam. A resin layer or a layer provided with a picture layer or a concavo-convex pattern is generally used. However, decorative sheets using vinyl chloride resin
There is a problem of waste material treatment such as harmful hydrogen chloride gas generated during combustion, which cannot be incinerated in general incinerators, and a problem of poisoning by inhaling hydrogen chloride gas generated during a fire. In addition, the use of a decorative sheet using a vinyl chloride resin has been avoided.

[0003] In recent years, as a decorative sheet instead of a decorative sheet using a vinyl chloride resin, a decorative sheet using a non-halogen resin having no halogen element such as chlorine in its molecular structure has been used. It has become. A typical decorative sheet using a non-halogen resin is a decorative sheet using an olefin resin such as polyethylene. This olefin resin such as polyethylene is environmentally friendly without generating harmful hydrogen chloride gas even when incinerated and incinerated as compared with vinyl chloride resin, but is flammable, and is required at least for decorative sheets. Since it is necessary to impart flame retardancy, a flame retardant is usually added to an olefin resin such as polyethylene.

However, in order to impart flame retardancy to this kind of decorative sheet made of an olefin resin such as polyethylene, it is said that there is a problem in safety as a flame retardant added to an olefin resin such as polyethylene. Use a flame retardant such as antimony trioxide and / or a phosphoric acid ester containing a halogen element in spite of using an olefin resin instead of the vinyl chloride resin, or reduce the amount of these additives For this purpose, other flame retardants, for example, a mixture of one or more of inorganic substances such as aluminum hydroxide, magnesium hydroxide, calcium carbonate, barium carbonate, titanium oxide, etc. are used in combination and used in large amounts. The decorative sheet provided with the olefin-based resin layer containing a large amount of the flame retardant thus obtained has Scratch resistance Te, wear resistance, resulting in deterioration of tensile elongation. Furthermore, a foaming resin layer formed by adding a foaming agent to the olefin-based resin layer and foaming by heating causes variations in foam cells (poor foaming efficiency) and a rough surface, resulting in poor design.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide an environment having a flame retardancy equivalent to that of a decorative sheet using a vinyl chloride resin. It is an object of the present invention to provide a decorative sheet which is gentle to the skin and has excellent scratch resistance, abrasion resistance and tensile elongation. Further, when a foamed resin layer is provided, in addition to the above-mentioned characteristics, a foamed resin layer having a substantially uniform foamed cell shape (having good foaming efficiency) with little variation can be obtained and the surface thereof can be smoothed. And to provide a decorative sheet having excellent design properties.

[0006]

Means for Solving the Problems In order to achieve the above object, the present inventor has set forth a decorative sheet according to the present invention in which a silicone-based flame retardant and an inorganic-based flame retardant are coated on a paper substrate. Characterized in that at least a flame-retardant layer made of a non-halogen thermoplastic resin to which an additive containing at least is added is formed. By using the silicone-based flame retardant in this way, the total amount of the flame retardant can be reduced to provide an environmentally friendly decorative sheet having the same level of flame retardance as a decorative sheet using a vinyl chloride resin. If the total amount of the flame retardant is added up to the total amount of the flame retardant when the silicone-based flame retardant is not used, the flame retardancy can be further improved). In addition, a decorative sheet having excellent scratch resistance, abrasion resistance and tensile elongation can be obtained.

[0007] The invention described in claim 2 is the first invention.
Wherein the flame-retardant layer is a foamed resin layer obtained by heating and foaming by adding a foaming agent. With this configuration, it is possible to obtain a foamed resin layer having a substantially uniform foamed cell shape (having good foaming efficiency) with little variation, and to obtain a foamed resin layer having a smooth surface. A decorative sheet having excellent design properties can be obtained.

[0008] The invention described in claim 3 is the first invention.
Wherein the non-halogen thermoplastic resin is made of one or more mixed resins of polyethylene, polypropylene, and a copolymer resin of ethylene and a non-halogen monomer. .
With this configuration, the flame retardant layer can be easily formed by extruding with a T-die extruder.

According to a fourth aspect of the present invention, in the decorative sheet according to any one of the first and second aspects, the flame-retardant layer is formed of the silicone based on 100 parts by weight of the non-halogen thermoplastic resin. 2 to 20 parts by weight of the inorganic flame retardant and 20 to 70 parts by weight of the inorganic flame retardant. With such a configuration, good workability can be obtained when the flame-retardant layer is formed by the hot melt extrusion method. Further, when the flame retardant layer is foamed, a foamed layer having a uniform foamed cell shape can be obtained.

[0010] The invention described in claim 5 is the first invention.
Wherein the silicone-based flame retardant comprises polydimethylsiloxane alone and silicon dioxide. With this configuration, in particular, polydimethylsiloxane having an average molecular weight of about 400,000 has a crosslinked structure with silicon dioxide when burned,
It plays a role in blocking the propagation of the combustion gas generated by burning the polymer, and prevents the burning from continuing.

[0011] The invention according to claim 6 is the first invention.
The decorative sheet according to any one of Items 1 to 5, wherein at least a surface protective layer is formed on the flame-retardant layer. With this configuration,
A decorative sheet having more excellent performance in scratch resistance, abrasion resistance and tensile elongation can be obtained.
When the flame-retardant layer is a foamed resin layer, a decorative sheet having a substantially uniform foamed cell-shaped foamed resin layer having even more excellent foaming efficiency and less variation can be obtained.

The invention according to claim 7 is the first invention.
7. The decorative sheet according to any one of items 1 to 6, wherein the flame-retardant layer is formed by a hot melt extrusion method. With this configuration,
A drying step or the like is not required as compared with a case where a sol or an emulsion is applied to form a flame-retardant layer, and the number of processing steps can be reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a layer structure of a decorative sheet according to a first embodiment of the present invention, FIG. 2 is a diagram showing a layer structure of a decorative sheet according to a second embodiment of the present invention, and FIG. It is a layer structure diagram of 3rd Embodiment, In the figure, 1,1 ', 1''is a decorative sheet, 2 is a paper base material,
Reference numerals 3, 3 'denote a flame-retardant layer, 4 denotes a picture layer, 5 denotes a surface protective layer, and 6 denotes an uneven pattern.

FIG. 1 is a diagram showing a layer structure of a decorative sheet according to a first embodiment of the present invention. A decorative sheet 1 is prepared by coating a paper base 2 with a silicone-based flame retardant using a T-die extruder. A non-halogen thermoplastic resin to which an additive containing at least a metal hydroxide (metal hydrate) flame retardant is added is heated and melt-extruded to form a flame-retardant layer 3 (formed by a T-die extrusion method). And a pattern layer 4 on the flame-retardant layer 3.
And a surface protective layer 5 in this order. The flame-retardant layer 3 may be formed by applying a sol or an emulsion by various coating methods other than the above-described forming method.
It is desirable to form by a die extrusion method.

FIG. 2 shows a layer configuration diagram of a decorative sheet according to a second embodiment of the present invention.
The decorative sheet 1 of the first embodiment shown in FIG. 1 is a flame-retardant layer 3 ′ made of a foamed resin layer obtained by heating and foaming by adding a foaming agent to the flame-retardant layer 3. Is the same as in the first embodiment.

FIG. 3 shows a layer configuration diagram of a decorative sheet according to a third embodiment of the present invention.
The decorative sheet 1 ′ of the second embodiment shown in FIG. 2 is provided with an uneven pattern 6 from the surface protective layer 5 side, and is otherwise the same as the second embodiment.

Next, the decorative sheet of the present invention will be described in more detail. First, as the paper base material 2 used in the present invention, flame-retardant paper for wallpaper (a sheet obtained by treating a pulp-based sheet with a flame retardant such as guanidine sulfamate or guanidine phosphate), aluminum hydroxide, magnesium hydroxide, or the like. An inorganic paper mixed with an inorganic agent, or a paper commonly used as a backing paper for wallpaper, such as general paper, can be used, and its basis weight is suitably from ²⁰ to 300 g / m ² , and more preferably 70 g / m ^2. 150150 g / m ² .

Next, the flame retardant layer 3 will be described. The resin forming the flame-retardant layer 3 is not particularly limited as long as it is a non-halogen-based thermoplastic resin, but the flame-retardant layer 3 is most efficiently formed by a T-die extrusion method. Considering that the resin can be formed by the method and is easy and inexpensive to process, it is possible to mix one or more of lower polyolefins such as polyethylene and polypropylene, or copolymer resins of ethylene and non-halogen monomers. Resins are suitable. Examples of the copolymer resin include a copolymer of ethylene and two or more olefins such as propylene, butene, butadiene, and isoprene, or a copolymer of ethylene and an α-olefin having 4 or more carbon atoms, or Ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-
Examples thereof include a vinyl acetate copolymer and an ionomer, and a mixed resin composed of one or more of these. More preferably, ethylene is used because it has a relatively small calorie burned. A vinyl acetate copolymer, or one or a mixture of amorphous polyolefin resins obtained by copolymerizing propylene with ethylene and / or butene-1 because of their excellent low-temperature processability; Can be mentioned.

Next, the flame retardant added to the flame retardant layer 3 will be described. As the flame retardant, those that are environmentally friendly and can effectively impart flame retardancy with a small amount by adding the flame retardant are preferable, and as a result of repeating various tests, silicone-based flame retardants are extremely effective. It has been found. Specifically, it is preferable to use polydimethylsiloxane alone or a mixture of a polydimethylsiloxane derivative having an epoxy group or a methacrylate group and silicon dioxide. By using 100% of the silicone flame retardant, 30 parts by weight of the resin forming the flame retardant layer 3 is used.
The flame retardant can be sufficiently imparted in parts by weight, but since the silicone flame retardant is expensive, it is not possible to use 100% of the silicone flame retardant and use it in combination with other environmentally friendly flame retardants. I have no choice. Examples of the flame retardant used in combination with the silicone flame retardant include inorganic flame retardants, specifically, a mixture of one or more inorganic substances such as aluminum hydroxide, magnesium hydroxide, calcium carbonate, barium carbonate, and titanium oxide. It is appropriate to use a combination of the above for the above reasons.

Next, the flame-retardant layer 3 'made of a foamed resin layer will be described. The flame-retardant layer 3 'can be formed by adding a foaming agent to the flame-retardant layer 3 and foaming it in a heating foaming furnace. As the foaming agent, a thermal expansion type capsule foaming agent containing a low-boiling hydrocarbon may be used, but azodicarbonamide, azodicarbonamide and azocarbonate are preferred because of their low cost and excellent flame retardancy and self-extinguishing properties. A thermal decomposition type blowing agent of an azo compound such as bisformamide is suitable. The mixing amount of the thermal decomposition type foaming agent with the resin forming the flame-retardant layer 3 'is preferably about 2 to 10 parts by weight based on 100 parts by weight of the resin.

The flame-retardant layers 3 to 3 ′ are provided with a purpose of preventing deterioration due to ultraviolet rays and improving weather resistance.
A radical scavenger as a light stabilizer, if necessary, and / or
Alternatively, an ultraviolet absorber can be added. As this radical scavenger, a hindered amine radical scavenger is preferable. The reason for this is that the hindered amine radical scavenger has a tetraalkylpiperidine in its mother nucleus and has a radical scavenging action of scavenging radicals generated by ultraviolet rays, as well as hydroperoxide (ROOH).
It is presumed that the effect is exerted by various action mechanisms such as the inactive action of, and excellent performance can be obtained as a multifunctional stabilizer. Specific examples of the hindered amine radical scavenger include bis- (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis- (N-methyl-
2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis- (1,2,2,6,6-pentamethyl-
4-piperidyl) sebacate, 1,2,2,6,6-pentamethyl-4-piperidyl-tridecyl-1,2,2
3,4-butanetetracarboxylate, tetragis-
(2,2,6,6-tetramethyl-4-piperidyl)-
In addition to 1,2,3,4-butanetetracarboxylate and the like, for example, a hindered amine radical scavenger such as a compound disclosed in Japanese Patent Publication No. 4-82625 can be exemplified. It is appropriate to add 0.01 to 3.0 parts by weight of the hindered amine radical scavenger based on 100 parts by weight of the resin forming the flame retardant layer 3 to 3 '.

Further, as the ultraviolet absorber, for example,
2- (2'-hydroxy-3 ', 5'-di-tert-butylphenyl) -5-chlorobenzotriazole, 2- (2'
-Hydroxy-3'-tert-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3'-tert-amyl-5'-isobutylphenyl) -5-chlorobenzotriazole , 2- (2'-hydroxy-3'-isobutyl-5'-methylphenyl) -5
-Chlorobenzotriazole, 2- (2'-hydroxy-
2'-hydroxyphenyl-5- such as 3'-isobutyl-5'-propylphenyl) -5-chlorobenzotriazole
Chlorobenzotriazole UV absorbers, 2- (2 ′
-Hydroxy-3 ', 5'-di-tert-butylphenyl) benzotriazole, 2- (2'-hydroxy-5'-
2′-hydroxyphenylbenzotriazole ultraviolet absorbers such as methylphenyl) benzotriazole;
2'-dihydroxy-4-methoxybenzophenone, 2,
2,2′-dihydroxybenzophenone-based ultraviolet absorbers such as 2′-dihydroxy-4,4′-dimethoxybenzophenone, 2,2 ′, 4,4′-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone,
2-hydroxybenzophenone UV absorbers such as 2,4-dihydroxybenzophenone; salicylate UV absorbers such as phenyl salicylate and 4-tert-butyl-phenyl-salicylate; 2-ethyl-
Use of cyanoacrylate ultraviolet absorbers such as hexyl-2-cyano-3,3-diphenylacrylate, ethyl-2-cyano-3,3-diphenylacrylate, octyl-2-cyano-3,3-diphenylacrylate and the like. be able to. The amount of these UV absorbers added is
It is usually about 0.1 to 10 parts by weight based on 100 parts by weight of the resin forming the flame-retardant layers 3 to 3 '. In consideration of environmental friendliness, among the above-mentioned ultraviolet absorbers, a chlorine-free ultraviolet absorber is preferable.

The flame-retardant layers 3 to 3 'may be colored as necessary, and the coloring agent used may be either an organic pigment or an inorganic pigment. It may be used arbitrarily, but must be a high concealment pigment, and inorganic pigments such as titanium dioxide, zinc white, red iron oxide, vermilion, cobalt blue, titanium yellow, graphite, carbon black, or aluminum, brass, etc. In general, pearlescent (pearl) pigments made of foil powder such as metal pigments, titanium dioxide-coated mica, and basic lead carbonate are preferred. These are added and dispersed as a powdery or scaly foil piece to the resin forming the flame retardant layers 3 to 3 ′.

Next, the picture layer 4 will be described. The pattern layer 4 can be generally formed with ink by a known printing method such as gravure printing, offset printing, silk screen printing, and transfer printing from a transfer sheet. Examples of the print pattern include a wood pattern, a stone pattern, a cloth pattern, a leather pattern, a geometric figure, a character, a symbol, and a print pattern such as a solid image. As the ink, as a vehicle, chlorinated polyethylene, chlorinated polyolefin such as chlorinated polypropylene, polyester, polyurethane composed of isocyanate and polyol, polyacryl, polyvinyl acetate, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, cellulose It is possible to use a mixture of one or two or more types of resin, polyamide resin, etc., and to add ink, by adding pigments, solvents, various auxiliaries, etc., but consider environmentally friendly decorative sheets Then, a non-chlorine vehicle in which one or more kinds of polyester, polyurethane composed of isocyanate and polyol, polyacryl, polyvinyl acetate, cellulose resin, polyamide resin and the like are mixed is preferable.

Next, the surface protective layer 5 will be described. The surface protective layer 5 is provided for imparting scratch resistance, abrasion resistance, chemical resistance, stain resistance, etc. to the decorative sheets 1, 1 ', 1''of the present invention, and is made of an epoxy-based material. Resin, acrylic resin, urethane resin, polyamide resin, polyester resin, or one kind of polyolefin such as polyethylene, polypropylene, polybutene, polybutadiene, isoprene or olefin such as ethylene, propylene, butene, butadiene, isoprene; Or more copolymers, or copolymers of α-olefins having 4 or more carbon atoms, or ethylene-acrylic acid copolymers, ethylene-methyl acrylate copolymers, ethylene-
Ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-vinyl acetate copolymer, saponified ethylene-vinyl acetate copolymer, or ionomer,
Alternatively, a resin such as a mixed resin composed of one or more of these is appropriate, and in consideration of the adhesiveness to a layer directly in contact with the surface protective layer 5 such as the picture layer 4, etc. A mixture of one or more resins may be used as appropriate. As a method for forming the surface protective layer 5, for example, a solution of the resin or a solution obtained by heating and melting the resin is coated by a known gravure printing method, roll coating method, extrusion coating method, or the like. It can be formed by coating using appropriate means, or by laminating the above resin into a film by a known dry lamination method or the like. The thickness of the surface protective layer 5 is 0.5 to 100 μm when dry, usually about 1 to 15 μm.

Next, the uneven pattern 6 will be described. The formation of the concavo-convex pattern 6 is carried out by using a well-known sheet-fed or rotary embossing machine, and embossing the outermost layer on the base material 2 with an embossing plate when the decorative sheet is in a heated state. By cooling afterwards, the concavo-convex pattern 6 can be formed from the outermost layer on the base material 2 to the flame-retardant layer 3 ′. Examples of the shape of the uneven pattern 6 include a wood grain board conduit groove, a stone board surface unevenness, a cloth surface texture, a satin finish, a grain, a hairline, and a linear groove.

In the first to third embodiments described above,
It shows a typical layer configuration of the decorative sheet of the present invention, and the decorative sheet of the present invention is not limited to these. For example, the decorative sheet may be formed from the foamed resin layer shown in the second and third embodiments. A decorative sheet having a layer configuration in which the flame-retardant layer 3 as described in the first embodiment is provided above or below or above or below the flame-retardant layer 3 ′ for the purpose of improving design and workability. No problem. As a method of forming such a multi-layered flame retardant layer, it is most preferable to form it by a co-extrusion method in consideration of the number of processing steps.

[0028]

The present invention will be described in more detail with reference to the following examples. Example 1 A resin composition A shown in Table 1 was heated and melted from a T-die extruder on an inorganic paper (Misunori Paper Co., Ltd .: Sunwall) mixed with aluminum hydroxide having a basis weight of 120 g / m ^2. Extrusion coating to a thickness of μm, inorganic paper 120 g / m ² / resin composition A
After preparing a laminate having a thickness of 100 μm and subjecting the surface of the resin composition A of the laminate to corona discharge treatment, the corona discharge-treated surface was made of an aqueous ink composed of an acrylic resin [manufactured by Dainichi Seika Kogyo:
Hydrick WP] to form a gravure pattern layer, and apply a two-component curable urethane resin to the entire surface of the pattern layer using a well-known gravure printing method so as to be ² g / m ² when dry. Thus, a surface protective layer was formed. This is furnace temperature 18
The resin composition A was foamed to a thickness of 400 μm in a foaming furnace at 0 ° C. to 220 ° C., and embossed with a grain pattern embossing plate from the surface protective layer side to obtain a decorative sheet of the present invention. Obtained.

Example 2 A flame-retardant paper for wallpaper having a basis weight of 80 g / m ² [Kojin Co., Ltd .: WK]
Resin composition B shown in Table 1 heated and melted from a T-die extruder
Extruded to a thickness of 120 μm and coated with flame-retardant paper for wallpaper 80 g / m ²
/ Resin composition B A laminate having a thickness of 120 μm was prepared, and a corona discharge treatment was applied to the surface of the resin composition B of the laminate, and then a primer liquid composed of an ethylene copolymer resin [the ink tech ( Co., Ltd .: Ode EV] is applied by a well-known gravure coating method so as to be ² g / m ² when dry, and the coated surface is coated with an aqueous ink composed of an acrylic resin [The Inktec Co., Ltd .: Ode KS]. Gravure printing is performed to form a wood-grain pattern layer, and a two-component curable urethane resin is dried over the entire surface of the pattern layer by a known gravure printing method.
g / m ² was applied to form a surface protective layer. The resin composition B was foamed to a thickness of 500 μm in a foaming furnace having a furnace temperature of 180 ° C. to 220 ° C., and embossed with a wood grain pattern embossing plate from the surface protective layer side. The decorative sheet of the invention was obtained.

Comparative Example 1 A resin composition shown in Table 1 which was heated and melted from a T-die extruder on an inorganic paper (Misunori Paper Co., Ltd .: Sunwall) mixed with aluminum hydroxide having a basis weight of 120 g / m ² . C is extruded to a thickness of 100 μm and coated with inorganic paper 120 g / m ² / resin composition C
After preparing a laminate having a thickness of 100 μm and subjecting the resin composition C surface of the laminate to a corona discharge treatment, the corona discharge-treated surface is made of an aqueous ink of an acrylic resin [manufactured by Dainichi Seika Kogyo:
Hydrick WP] to form a gravure pattern layer, and apply a two-component curable urethane resin to the entire surface of the pattern layer using a well-known gravure printing method so as to be ² g / m ² when dry. Thus, a surface protective layer was formed. This is furnace temperature 18
In a foaming furnace at 0 ° C. to 220 ° C., the resin composition C was foamed to a thickness of 400 μm, and embossed with a grain pattern embossing plate from the surface protective layer side. I got

Comparative Example 2 A flame-retardant paper for wallpaper having a basis weight of 80 g / m ² [Kojin Co., Ltd .: WK]
Resin composition D shown in Table 1 which was heated and melted from a T-die extruder
Extruded to a thickness of 120 μm and coated with flame-retardant paper for wallpaper 80 g / m ²
/ A laminate having a resin composition D of 120 μm was prepared, a corona discharge treatment was performed on the resin composition D surface of the laminate, and a primer solution composed of an ethylene copolymer resin was formed on the corona discharge treatment surface [The Inktec ( Co., Ltd .: Ode EV] is applied by a well-known gravure coating method so as to be ² g / m ² at the time of drying, and gravure printing is performed on the coated surface with an aqueous ink made of an acrylic resin (manufactured by The Inktec: Ode KS). A pattern layer having a wood grain pattern was formed, and a two-component curable urethane resin was applied to the entire surface of the pattern layer by a well-known gravure printing method so as to be ² g / m ² when dry, to form a surface protective layer. The resin composition D was placed in a foaming furnace having a furnace temperature of 180 ° C. to 220 ° C.
In addition to foaming to a thickness of 500 μm, embossing was performed from the surface protective layer side with an embossing plate having a wood grain pattern to obtain a decorative sheet as a comparative example.

[Table 1] * 1: Ethylene-methyl methacrylate copolymer * 2: Ethylene-vinyl acetate copolymer (vinyl acetate content 20%)

With respect to the decorative sheets of Examples 1 and 2 and Comparative Examples 1 and 2 prepared above, the Building Standard Law Enforcement Ordinance (Showa
(2013 Cabinet Order No. 338) In accordance with the provisions of Article 1, Items 5 and 6, a heating test is performed according to the surface test used when designating quasi-nonflammable materials and flame-retardant materials, and the appearance of the foamed resin layer Was visually evaluated, and the results are shown in Table 2.

[Table 2] * 3: tdθ indicates temperature-time area (unit: degree Celsius / minute) * 4: Ca indicates smoke emission coefficient

As is clear from the results shown in Table 2, in Examples 1 and 2 of the present invention, the calorific value during combustion can be suppressed lower than in Comparative Examples 1 and 2. In Example 1, the melt tension at the time of foaming was insufficient, and cell roughness of the foamed cells occurred. However, in Example 1, the addition of the silicone-based flame retardant increased the melt tension at the time of foaming, and the foamed cells did not have cell roughness. A clean foam cell having a uniform shape could be formed.

[0036]

As described above, the decorative sheet of the present invention has excellent scratch resistance, abrasion resistance and tensile elongation, and has the same level of flame retardance as a decorative sheet using a vinyl chloride resin. An environmentally friendly decorative sheet having properties can be obtained. Further, when a foamed resin layer is provided, in addition to the above-mentioned characteristics, a foamed resin layer having a substantially uniform foamed cell shape (having good foaming efficiency) with little variation can be obtained and the surface thereof can be smoothed. Thus, a decorative sheet having excellent design properties can be obtained.

[Brief description of the drawings]

FIG. 1 is a layer configuration diagram of a first embodiment of a decorative sheet according to the present invention.

FIG. 2 is a layer configuration diagram of a second embodiment of the decorative sheet according to the present invention.

FIG. 3 is a layer configuration diagram of a third embodiment of the decorative sheet according to the present invention.

[Explanation of symbols]

 1,1 ', 1' 'decorative sheet 2 paper base 3,3' flame-retardant layer 4 picture layer 5 surface protective layer 6 uneven pattern

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08K 3/00 C08K 3/00 C08L 23/04 C08L 23/04 23/10 23/10 83/04 83 / 04 101/00 101/00 F term (reference) 4F074 AA17 AA22 AA23 AA24 AA90 AA97 AA98 AC17 AC19 AC20 AC32 AD16 AG03 AG06 AG10 BA13 CA29 CC04Y DA35 DA54 4F100 AA00B AA00H AA19 AA20B AA20H AK01B01B CABCAB KA04B01B EH17 HB21 HB31 JB16B JJ07 JJ07B 4J002 BB031 BB041 BB051 BB061 BB071 BB081 BB121 BB231 CP032 CP052 CP162 DE076 DE136 DE146 DE236 DJ016 EQ017 FD050 FD090 FD136 FD327 GF00 GL00 GN00

Claims (7)

[Claims] 1. A flame retardant layer made of a non-halogen thermoplastic resin to which an additive containing at least a silicone flame retardant and an inorganic flame retardant is added on a paper substrate. And decorative sheet. 2. The decorative sheet according to claim 1, wherein the flame-retardant layer is a foamed resin layer obtained by heating and foaming by adding a foaming agent. 3. The method according to claim 1, wherein the non-halogen-based thermoplastic resin is a mixed resin of one or more of polyethylene, polypropylene, and a copolymer resin of ethylene and a non-halogen-based monomer. Makeup sheet. 4. The flame-retardant layer contains 2 parts of the silicone-based flame retardant per 100 parts by weight of the non-halogen thermoplastic resin.
The decorative sheet according to claim 1, wherein the inorganic flame retardant comprises 20 to 70 parts by weight. 5. The decorative sheet according to claim 1, wherein the silicone-based flame retardant comprises a simple substance of polydimethylsiloxane and silicon dioxide. 6. The decorative sheet according to claim 1, wherein at least a surface protective layer is formed on the flame retardant layer. 7. The decorative sheet according to claim 1, wherein the flame-retardant layer is formed by a hot melt extrusion method.