JP2019111721A - Natural grain laminated sheet, and decorative non-combustible material and decorative semi-non-combustible material using the same - Google Patents

Abstract

To provide a natural grain laminated sheet, and a decorative non-combustible material and a decorative semi-non-combustible material using the same, having woody, natural, and luxury appearance as well as causing no gap or peeling to be created while securing practical physical properties, and having excellent fire-proof property even after being installed without being processed in flame-retardant treatment.SOLUTION: A natural grain laminated sheet 50 is configured by attaching a backing material on a rear surface of a wooden decorative thin plate 41 with decorativeness on a surface as well as made of a woody material processed with a dimension stabilization treatment without being subjected to a flameproof treatment. The natural grain laminated sheet is attached on a surface of a non-combustible material (steel, a metal plate 61, etc.) or a semi-non-combustible material (gypsum boards etc.) as a base material. The material configured thereby meets standards on the non-combustible material or the semi-non-combustible material in the pyrogen test measured with a cone calorimeter in accordance with ISO5560-1:2002.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a natural cocoon sheet having a decorative decorative wood laminate sheet as a component, and more specifically, the natural cocoon sheet is laminated to a noncombustible material or a semicombustible material, and also after construction The present invention relates to a natural firewood sheet which has high flame resistance and can be applied as a non-combustible material or a semi-non-combustible material, and a cosmetic non-combustible material and a cosmetic semi-non-combustible material using the same.

  Nowadays, due to the exhaustion of natural wood resources, especially precious wood resources, wooden decorative thin plates made of wood planks in place of solid wood are widely used as materials for producing wood texture, natural feeling and luxury feeling. In addition to wood planks made of wood, as a material to further produce a sense of luxury due to surface changes, wood patterns are combined with various wood materials to reproduce a geometric pattern such as a parquet pattern or a koshiko pattern on the surface. Wood-made decorative thin plates made into plates have also been developed.

  As the application of these wood decorative thin plates for producing the wood texture, natural feeling and high-grade feeling, for example, architectural interior materials such as ceiling surface materials, wall surface materials, column covering materials, surface materials of interior products of automobiles and ships, And the like, as well as the external cosmetic of furniture, and the external cosmetic of electrical appliances and musical instruments. In these applications, development of flameproofed wood decorative laminates has been carried out from the viewpoint of safety. In particular, in the field of construction and interior materials where demand is high, trees can be used in places with limited interiors such as stores, commercial facilities, and interiors of buildings by meeting non-combustible and semi-combustible standards in accordance with the Building Standards Act. This makes it possible to produce effects that take advantage of the material's texture, and can stimulate even greater demand.

  Therefore, development of non-combustible, semi-non-combustible wood decorative thin plates in accordance with the Building Standard Law is also in progress. For example, in Patent Document 1 below, a flame resistant name wood decorative sheet is proposed. In this flame retardant name wood decorative sheet, each layer of name wood veneer / paper / nonwoven fabric / metal foil / paper / nonwoven fabric is integrally pressure-bonded through an adhesive resin layer, and it is difficult to use this adhesive resin layer. A flame retardant is contained. Moreover, in the following patent document 2, a makeup nonflammable material is proposed. This decorative noncombustible material is covered with a decorative veneer through a noncombustible sheet on a predetermined base material. This noncombustible sheet is composed of an aluminum foil and a fibrous sheet, and a paper or non-woven fabric is used for the fibrous sheet.

JP 06-115008 A JP 2007-144655 A

  By the way, although the flame retardant is contained in the adhesive resin layer in the flame retardant name wood decorative sheet of the above-mentioned patent documents 1, the name wood veneer, paper, and the nonwoven fabric are not given the flame retardant, The flammability is not sufficient. In addition, even if a fire retardant is added to a name wood veneer, paper, and non-woven fabric, its flame resistance becomes insufficient when the thickness of the wood part increases. On the other hand, the noncombustible sheet of Patent Document 2 is considered to have a performance conforming to the current Building Standard Act. However, as a decorative veneer to be used, the rattan board or wood board processed from the name wood is used as it is, and neither the flameproofing process nor the dimensional stabilization process is performed. Therefore, no further device can be added to the design of the surface.

  When such a decorative veneer is coated on a base material via a non-combustible sheet consisting of an aluminum foil and a fibrous sheet, an adhesive portion is formed between the decorative veneer consisting of wood and the aluminum foil which is a metal sheet. Distortion will occur. That is, there is a problem that a gap is generated between the decorative veneer and the metal sheet to cause problems such as peeling due to a change in water content due to moisture absorption drying and a difference in expansion and contraction due to a change in air temperature.

  In addition, in the case of a wood decorative thin plate having a high design property on its surface, that is, a wood decorative plate in which a pattern block reproducing the above-mentioned parquet pattern or fabric pattern is used as a veneer, there is a problem that these problems are particularly likely to occur. is there. For example, in the case of laminating a wood decorative thin plate which reproduces a geometric pattern such as a parquet pattern or a Kumiko pattern with a metal sheet and using it as an architectural interior material etc., the physical properties required of this wood decorative thin plate are conventional Level is not enough.

  Specifically, in the case of laminating a wood decorative thin plate made of extremely thin design blocks such as a parquet pattern or a Kumiko pattern with a metal sheet and using it as an architectural interior material, etc., In addition, the dimensional stability to changes in moisture content is low, and warping and twisting occur, causing the pattern to collapse, causing cracking of the wood decorative thin plate and peeling of the wood decorative thin plate and the metal sheet. .

  In addition, in order to improve the physical properties required of the wood decorative thin plate, it is necessary to apply a dimensional stabilization treatment and maintain the thickness of the wood decorative thin plate to some extent. On the other hand, when the thickness of the wood decorative thin plate is maintained to a certain extent, it is necessary to subject the wood decorative thin plate itself to a highly flame-retardant treatment, which leads to a significant increase in processing costs as well as processing difficulties.

  Then, the present invention copes with the above thing and is a noncombustible material using a wood decorative thin plate having excellent designability by geometric patterns such as natural wood grain, gossack pattern and parquet pattern as a surface material. When laminated to etc., it has wood texture, natural feeling, high-class feeling, secures practical physical properties and does not cause gaps or peeling, and it is also highly advanced after construction without giving incombustible treatment It is an object of the present invention to provide a natural fireproof sheet having a fire resistance, and a cosmetic noncombustible material and a cosmetic quasi noncombustible material using the same.

  In order to solve the above problems, as a result of earnest research, the present inventors usually carry out predetermined dimensional stabilization treatment on a wood decorative thin plate which composes a geometric pattern such as a veneer, a gobo or a parquet. The present inventors have found that the above-described object can be achieved without the use of a flameproofing treatment, as the coating can be extremely thinly scraped (also referred to as a "duck board"), and the present invention has been accomplished.

That is, according to the description of claim 1, the smallpox sheet according to the present invention
Non-combustible materials (steel and metal plate etc.) exemplified in the Ministry of Construction Notification No. 1400 in 2000, or quasi incombustible materials (Gypsum board) exemplified in the Ministry of Construction notification No. 1401 No. 1 Etc.) as a base material, it is a surface cosmetic material applied to the surface,
It is made of a wood material that has been subjected to a dimensional stabilization treatment without being subjected to a flameproofing treatment, and a backing material is adhered to the back surface of a wood decorative thin plate having a decorative property on the surface,
It is characterized in that it conforms to the standard of non-combustible material or quasi-non-combustible material in the heat generation test with a cone calorimeter based on ISO5560-1: 2002 measured in a state of being attached to the surface of the substrate.

Further, according to the second aspect of the present invention, there is provided the smallpox sheet according to the first aspect, wherein
The wood decorative thin plate is characterized in that it is a wood dyed decorative thin plate produced from a wood material which has been subjected to a dimensional stabilization treatment and a dyeing treatment simultaneously without giving a flameproofing treatment.

Further, according to the third aspect of the present invention, there is provided the smallpox sheet according to the first or second aspect, wherein
The wood-made decorative thin plate is characterized by being generally made of a single plate having natural wood grain as a decorative material.

Further, according to the fourth aspect of the present invention, there is provided the smallpox sheet according to the first or second aspect, wherein
The wood decorative thin plate is made by scraping and thinning a pattern block formed so that a geometric pattern in which a plurality of wooden parts are combined appears on the surface so that the pattern appears on the surface,
A decorative process is applied to the surface of the wood decorative thin plate by the pattern of the pattern block.

Further, according to the fifth aspect of the present invention, there is provided the smallpox sheet according to the fourth aspect, wherein
The geometric pattern is characterized by being a parquet pattern or a kudzu pattern.

Further, according to the sixth aspect of the present invention, there is provided the smallpox sheet according to any one of the first to fifth aspects, wherein
It is characterized in that the thickness of the wood decorative thin plate is in the range of 0.10 to 0.50 mm.

Further, according to the seventh aspect of the present invention, there is provided the smallpox sheet according to the sixth aspect, wherein
The wood decorative thin plate is characterized in that it is scraped to the thickness by grinding or the like after chipping or chipping.

Further, according to the description of claim 8, the present invention relates to the natural cocoon sheet according to any one of claims 1 to 7, wherein
The drug used for the dimensional stabilization treatment is
A first component comprising an addition product of a cyclic urea compound and glyoxal,
A second component consisting of 4,5-dihydroxy-2-imidazolidinone or a derivative thereof,
It is characterized in that it comprises a third component consisting of glycols if necessary.

Further, according to the ninth aspect of the present invention, there is provided the smallpox sheet according to the eighth aspect, wherein
The first component comprises an addition product of 2-imidazolidinone and glyoxal, and is characterized in that 0.9 mole to 1.2 moles of glyoxal is added to 1 mole of 2-imidazolidinone. Do.

Further, according to the tenth aspect of the present invention, there is provided the smallpox sheet according to the eighth or ninth aspect, wherein
The second component is 1,3-dimethyl-4,5-dihydroxy-2-imidazolidinone, 1,3-bis (hydroxymethyl) -4,5-dihydroxy-2-imidazolidinone, and 1,3- It is characterized by comprising at least one selected from the group consisting of bis (hydroxyethyl) -4,5-dihydroxy-2-imidazolidinone.

Moreover, according to the description of claim 11, the cosmetic noncombustible material according to the present invention is
The natural cocoon sheet | seat of any one of Claims 1-10 is stuck on the surface of the said incombustible material as a surface cosmetic material.

Moreover, according to the description of claim 12, the decorative semi-combustible material according to the present invention,
The natural cocoon sheet according to any one of claims 1 to 10 is attached to the surface of the quasi-combustible material as a surface decorative material.

Further, according to the invention of claim 13, according to claim 13, there is provided a cosmetic noncombustible material according to claim 11.
The total weight (g / m) of organic compound per unit area in the total amount of the wood decorative thin plate, the surface coating agent for the wood decorative thin plate, the backing adhesive for bonding the wood decorative thin plate to the backing material, and the total amount of the backing material ² )
In the case where it is totaled with the mass (g / m ² ) of organic compound per unit area of the construction adhesive required when sticking the natural cocoon sheet consisting of these on the surface of the above-mentioned incombustible material or semi-incombustible material / M ² or less.

Further, according to the description of claim 14, the present invention is the decorative semi-combustible material according to claim 10, wherein
The total weight (g / m) of organic compound per unit area in the total amount of the wood decorative thin plate, the surface coating agent for the wood decorative thin plate, the backing adhesive for bonding the wood decorative thin plate to the backing material, and the total amount of the backing material ² )
In the case where it is totaled with the mass (g / m ² ) of organic compound per unit area of the construction adhesive required when sticking the natural cocoon sheet consisting of these on the surface of the above-mentioned incombustible material or semi-incombustible material / M ² or less.

  According to the above configuration, in the natural rattan sheet according to the present invention, the backing material is adhered to the back surface of the decorative wood thin plate. Due to the decorative property of the surface of the wood decorative thin sheet, the natural rattan sheet is excellent in design, and has wood texture, natural feeling and high-class feeling.

  Moreover, this wood-based decorative thin plate is manufactured from a wood material which has been subjected to a dimensional stabilization treatment without being subjected to a flameproofing treatment. By subjecting the wood decorative thin plate to a dimensional stabilization treatment, the wood decorative thin plate secures practical physical properties, and no gap or peeling occurs. Specifically, it does not break in the case of abrading process (sticking plate) for thinning, and the dimensional stability against the change of the moisture content becomes high. As a result, a deviation such as warping or twisting occurs, the pattern of decoration processing is broken, the wood decorative thin plate is not broken, and peeling of the wood decorative thin plate and the base does not occur.

  In addition, the smallpox sheet according to the present invention conforms to the standard of noncombustible material or semicombustible material in a heat generation test with a corn calorimeter according to ISO5560-1: 2002 measured in a state of being attached to the surface of a substrate be able to. In addition, although this wood-based decorative thin plate is not subjected to a flameproofing treatment, it has a high degree of flame resistance even after construction.

  Further, according to the above configuration, the wood decorative thin plate according to the present invention is a wood-dyed decorative thin plate manufactured from a wood material to which the dimension stabilization treatment and the dyeing treatment are simultaneously applied without performing the flameproofing treatment. May be In addition to the dimensional stabilization treatment being applied to the wood dyed decorative thin plate, the dyed treatment allows the sheet to have excellent designability in addition to the above-described effects.

  Moreover, according to the said structure, the wooden decorative thin plate concerning this invention may consist of a usual veneer which uses natural wood grain as a decorative material. By this, in addition to the said effect, it can have the outstanding designability.

  Further, according to the above configuration, the natural cocoon sheet according to the present invention has a predetermined thickness so that the pattern block appears on the surface so that the geometric pattern formed by combining a plurality of wooden parts appears on the surface. The wood decorative thin plate which is scraped and thinned is used. By this, in addition to the said effect, it can have the outstanding designability.

  Further, according to the above configuration, the geometric pattern of the wood decorative thin plate used for the natural rattan sheet according to the present invention may be a parquet pattern or a goji pattern. By this, the said effect can be exhibited more concretely.

  Moreover, according to the said structure, it is good for the thickness of the wood decorative thin plate used for the natural cocoon sheet | seat which concerns on this invention to exist in the range of 0.10-0.50 mm. By this, the calorific value at the time of combustion of a wood decorative thin board can be held down, and it can meet the standard of incombustible material or quasi incombustible material in the state stuck on the surface of a substrate. Further, according to the above configuration, the wood decorative thin plate may be scraped within a range of 0.10 to 0.50 mm by abrading process (sticking board) or grinding after abrasion process or the like.

  Further, according to the above configuration, the dimensional stabilization treatment of the wood decorative thin plate used for the natural cocoon sheet according to the present invention includes the first component comprising the addition product of the cyclic urea compound and glyoxal; A drug containing a second component consisting of dihydroxy-2-imidazolidinone or a derivative thereof and, if necessary, a third component consisting of glycols may be used. As a result, the dimensional stability of the wood decorative thin plate is improved, and a deviation such as warping or twisting occurs due to a change in water content due to moisture absorption or a difference in expansion and contraction due to a change in air temperature, and the decorative pattern is broken There is no occurrence of problems such as cracking of the wood decorative thin plate and peeling of the wood decorative thin plate and the base material.

  Moreover, according to the said structure, the cosmetic incombustible material or the cosmetic quasi-incombustible material which concerns on this invention is obtained by sticking the above-mentioned natural persimmon sheet | seat as a surface cosmetic material on the surface of the incombustible material or quasi incombustible material. This makes it possible to conform to the standards of noncombustible materials or semicombustible materials in a heat generation test with a corn calorimeter according to ISO 5560-1: 2002.

Further, according to the above configuration, the decorative incombustible material or the decorative quasi-incombustible material according to the present invention adheres to the above-mentioned wooden decorative thin plate, the surface coating agent of the wooden decorative thin plate, and the backing adhesive for bonding the wooden decorative thin plate and the backing material. The total mass (g / m ² ) of organic compound per unit area in the total amount of the agent and the backing material is required when sticking the natural rattan sheet consisting of these on the surface of the incombustible material or the semi-incombustible material in the case where the total mass of organic compound per unit area of the construction adhesive (g / ^{m 2),} a 200 g / ^{m 2} or less. By this, even when a natural cocoon sheet using a wood decorative thin plate which is not subjected to a flameproofing treatment is used as a surface decorative material, it is possible to conform to the standards of noncombustible materials or semicombustible materials.

  Therefore, according to the present invention, wood is laminated on a non-combustible material or the like by utilizing a wood decorative thin plate having excellent designability with a geometric pattern such as natural wood grain, a pattern of a goji or a parquet, as a surface material. A natural rattan that has texture, natural feeling and high-class feeling, secures practical physical properties and does not cause gaps and peeling, and has high flame resistance even after construction without applying flame retardant treatment A sheet, and a cosmetic noncombustible material and a cosmetic quasi-noncombustible material using the same can be provided.

It is a figure which shows the 1st step of shaping | molding of a parquet pattern wood decorative thin plate in Example 1. FIG. It is a figure which shows the 2nd step of formation of a parquet pattern wood decorative thin plate in Example 1. FIG. FIG. 5 is a view showing a final stage of forming a parquet-patterned wood decorative thin plate in Example 1; It is a figure which shows the other example (example 1) of the parquet-patterned wood decorative thin board with a geometric pattern. It is a figure which shows the other example (example 2) of the parquet pattern wood decorative thin board which has a geometric pattern. It is a figure which shows the other example (example 3) of the parquet pattern wood decorative thin board which has a geometric pattern. FIG. 1 is a cross-sectional view of a natural rattan sheet according to a first embodiment. FIG. 1 is a cross-sectional view of a cosmetic noncombustible material according to a first embodiment. FIG. 6 is a cross-sectional view of a smallpox sheet according to a second embodiment. FIG. 7 is a cross-sectional view of a decorative non-combustible material according to a second embodiment.

In general, the term "combustible, semi-combustible, flame-retardant" is used as a fire resistance standard. Therefore, in the present invention, the term "fireproof" is used when the term "combustible, semicombustible, flame retardant" is included. The smallpox sheet according to the present invention has a high degree of flame resistance even after construction and can meet the standards of noncombustible materials or semicombustible materials. The Building Standards Act, as amended in 2000, defines incombustible materials and semicombustible materials as follows. First, the non-combustible material refers to a material having a total calorific value of 8 MJ / m ² or less for a heating time of 20 minutes in a heat generation test with a corn calorimeter specified in ISO5560-1. Further, the quasi-combustible material refers to a material having a total calorific value of 8 MJ / m ² or less in a heating time of 10 minutes in the same heat generation test.

  In the present invention, a wood decorative sheet is used on the surface of the natural cocoon sheet. Any wood species may be used as a wood material used as a starting material of the wood decorative laminate. In addition, any of hardwoods and conifers may be used. For example, cedar, hinoki, pine, rawan, mahogany, bubinga, zebrawood and the like may be used. Furthermore, nara, hippo, zelkova, teak, etc. excellent in the design of the wood grain pattern may be used.

  In the present invention, among these tree species, it is preferable to use cedar, hinoki, teak and pine, which exert the effect of the dimension stabilization treatment to a large extent. When these tree species are used, due to the filling effect of the agent for dimensional stabilization treatment according to the present invention, the maximum change rate of the size when the wood material having a high moisture content in the green state is dried to the bone dry state. The value can be 3% or less and the maximum dimensional change of volume can exhibit a high dimensional stability such as 4% or less.

  In the present invention, the color or grain pattern of the wood material may be, for example, the natural color or grain pattern of cedar white hand (sapwood), cedar red hand (core), genpei cedar, and cypress. It may be used after being dyed in any color.

  Here, the term "color" refers to the combination of the colors represented by the wood material, the coloration and the coloration, the hue, the saturation, the lightness, etc. being different and causing a change in the design. In the present invention, the white color by bleaching is also included in the color. Therefore, natural wood may be used in its natural color or may be processed into any color by a dyeing process or a bleaching process.

  In the present invention, the surface of the wood decorative thin plate formed by processing the above-mentioned wood material has an excellent designability due to a geometric pattern such as natural wood grain, a goji pattern or a parquet pattern. Here, geometric patterns such as a pattern of mulberry and a pattern of parquet are described. The wood decorative thin plate having these geometric patterns is formed by thinning (patterning) a pattern block formed so that the geometric pattern appears on the surface to a predetermined thickness. This patterned block is formed by combining a plurality of wooden parts made of the above-mentioned wood material.

  Here, the sashimi pattern and the parquet pattern which constitute the geometric pattern will be described. In addition to the geometric pattern formed by a piece of kombo (generally referred to as a “wooden stalk piece” in the present invention), the komago pattern is embedded in the space portion of this geometric pattern. It refers to the overall pattern including wood grain patterns and colors appearing on the surface of wooden piece parts (described later). Therefore, a wooden piece part made of parquet is fitted in a space portion of a geometric pattern formed by the wooden structural elements, and a wooden pattern made by adding a parquet pattern is also called a sashimi pattern. On the other hand, in the present invention, the parquet pattern is a Japanese tradition such as stripe (sima), checkered pattern, checkered pattern (sayagata), hemp leaf, trout, arrow feathers, blue sea wave (seikaiha), which is made by common parquet technique. In addition to patterns, it refers to things including new patterns.

  On the other hand, in the present invention, conventional wood processing is used as a bonding resin for bonding wooden parts such as wooden parts, wooden piece parts or wooden parquet parts forming geometric patterns such as kodoko patterns or parquet patterns. The woodworking adhesive used in can be used. For example, urea resin adhesives, vinyl acetate resin adhesives, phenol resin adhesives, isocyanate adhesives, epoxy adhesives, silicone adhesives and the like can be mentioned.

  In particular, in the present invention, it is preferable to adopt one that does not require high temperature treatment for the adhesion reaction, and even at the stage where each wooden part is adhered, the agent for dimension stabilization treatment impregnated with these has not reacted. It is preferable that the resin is not cured (the reason will be described later). Furthermore, in the present invention, the wood material constituting each wooden part contains a large amount of water since it is in the green state by impregnating the treatment liquid. Therefore, even when the adherend contains a large amount of water, it is preferable to select an adhesive that is excellent in adhesion on the wet surface. From this, in the present invention, it is preferable to use a urethane resin adhesive which is the above-mentioned isocyanate adhesive.

  Generally, a urethane resin adhesive is a generic term for adhesives having a urethane group (-NHCOO-), but in the present invention, it is broadly interpreted and derived from an isocyanate group (-NCO) or a hydroxy group (-OH) Adhesive to be combined. These urethane resin adhesives have a urethane resin obtained by the reaction of a polyol compound and a polyisocyanate compound as a component, and it is possible to combine various types of raw materials and obtain various physical properties.

  These urethane resin adhesives generally have a two-component type and a one-component type. The two-component type can be cured by causing a chemical reaction by combining and mixing a polyol having terminal hydroxyl groups and a polyisocyanate, or a urethane prepolymer having terminal isocyanate groups and a terminal, and allowing room temperature adhesion. . On the other hand, in the case of the one-component type, a mixture of a urethane prepolymer and a catalyst cures and adheres by being humidified (moisture) or heated.

  In the present invention, among these urethane resin adhesives, it is preferable to use a wet-curable urethane resin adhesive which reacts with the moisture contained in the wood material constituting each wooden part. These wet-curable urethane resin adhesives are cured by the reaction of water in the adherend with isocyanate groups in the adhesive.

  Further, in the present invention, the wood material used as the starting material of the wood decorative thin plate has been subjected to a dimensional stabilization treatment in advance. On the other hand, in the present invention, the incombustible treatment is not applied to the wood material used as the starting material of the wood decorative thin plate. The reason will be described later.

  The dimensional stabilization treatment of woody material can use the method currently used by the usual wood processing. For example, chemical impregnation treatment with a glyoxal resin or the like, formalization treatment, acetylation treatment, filling treatment with polyethylene glycol or the like, and the like are used. In the present invention, practically sufficient strength and dimensional stability can be imparted to the produced wooden decorative thin plate by performing a dimensional stabilization treatment with a resin formulation described below. The prescription is described below.

  In the present invention, in the chemical agent impregnation step (described later), the wood material constituting each wooden part is impregnated with a treatment liquid (hereinafter referred to as “treatment liquid”) containing a chemical agent for dimension stabilization treatment. The agent for dimensional stabilization treatment in the treatment liquid includes a first component comprising an addition product of a cyclic urea compound and glyoxal, and a second component comprising 4,5-dihydroxy-2-imidazolidinone or a derivative thereof It is preferable to contain and.

  Here, the addition product of the cyclic urea compound and the glyoxal constituting the first component of the chemical agent for dimension stabilization treatment is, for example, a plurality of nitrogen atoms of various cyclic urea compounds such as a 5- or 6-membered ring. It is a generic term for compounds in which glyoxal is added to at least one. In the present invention, in particular, it is preferable to use an addition product of 2-imidazolidinone and glyoxal shown in the following chemical formula 1.

  In Chemical formula 1, n is an integer of 1 or more, one imino group of 2-imidazolidinone and one aldehyde group of glyoxal react, and 2-imidazolidinone and glyoxal repeat polyaddition alternately alternately. It forms an initial polymer.

  The structure of both ends of this prepolymer can be adjusted by changing the ratio of the number of moles of glyoxal added to 2-imidazolidinone. For example, if 2-imidazolidinone is used more than glyoxal, more imino groups of 2-imidazolidinone exist at both ends of the initial polymerization product, while glyoxal is used more than 2-imidazolidinone For example, many aldehyde groups of glyoxal will be present at both ends of the prepolymer.

  Here, the ratio of the number of moles of glyoxal added to 2-imidazolidinone may be any ratio, but in the present invention, 0.9 moles of glyoxal to 1 mole of 2-imidazolidinone is used. The pre-polymerized product obtained by adding ̃1.2 mol is preferable. Thus, by making the ratio of the number of moles of 2-imidazolidinone and glyoxal the same, the number of pre-polymers having both the imino group and the aldehyde group at both ends as shown in Chemical formula 1 is adjusted Be done. As a result, the initial polymer constituting the first component in the cell cavity, cell gap and cell wall of the wood material constituting each wooden part is easily polymerized by itself, and as a result, it is filled as a resin of higher molecular weight. The Rukoto.

  Next, in the present invention, 4,5-dihydroxy-2-imidazolidinone which constitutes the second component of the treatment liquid or a derivative thereof refers to 4,5-dihydroxy-2-imidazolidinone shown in the following chemical formula 2 Itself,

  Also, it is a generic term for compounds in which the hydrogen atom of two imino groups of 4,5-dihydroxy-2-imidazolidinone is substituted with another group. In particular, in the present invention, 1,3-dimethyl-4,5-dihydroxy-2-imidazolidinone, 3-bis (hydroxymethyl) -4,5-dihydroxy-2-imidazolidinone, 1,3-bis It is preferable to use at least one derivative selected from the group consisting of (hydroxyethyl) -4,5-dihydroxy-2-imidazolidinone.

  First, the structural formula of 1,3-dimethyl-4,5-dihydroxy-2-imidazolidinone is shown in Formula 3 below.

  In Formula 3, the 4- and 5-hydroxy groups are reactive with the cellulose molecules that make up the cell wall of the wood material that makes up each wooden part, and these cellulose molecules form a cross-linked structure to make the cell wall stronger. Contribute to improvement and dimensional stability. In addition, these hydroxy groups also react with high molecular weight resins obtained by self-polymerization of the initial polymer of Chemical formula 1 and connect the cell wall with the resin filled in the cell cavity, cell gap and cell wall of the wood material It also plays a role. As a result, the strength of the cell wall of the wood material constituting each wooden part is enhanced and the cell wall is filled with the cell cavity, cell gap and cell wall, and the dimensional stability and surface hardening of the produced wood decorative sheet are well achieved. Be done.

  Next, the structural formula of 1,3-bis (hydroxymethyl) -4,5-dihydroxy-2-imidazolidinone is shown in Formula 4 below.

  In Formula 4, the 1 and 3 hydroxymethyl groups are very reactive with the cellulose molecules that make up the cell walls of the wood materials that make up each wooden part, forming a strong cross-linked structure between the cellulose molecules. Contributes greatly to the improvement of cell wall strength and dimensional stability. In addition, hydroxy groups at 4- and 5-positions are also reactive with cellulose molecules to form a cross-linked structure between cellulose molecules. Furthermore, these hydroxymethyl groups or hydroxy groups also react with the high molecular weight resin obtained by self-polymerizing the prepolymerization product of Chemical formula 1 into the cell lumen, cell gap and cell wall of the wood material constituting each wooden part. It also plays a role in linking the loaded resin to the cell wall. As a result, the strength of the cell wall of the wood material constituting each wooden part is enhanced and the cell wall is filled with the cell cavity, cell gap and cell wall, and the dimensional stability and surface hardening of the produced wood decorative sheet are well achieved. Be done.

  Next, the structural formula of 1,3-bis (hydroxyethyl) -4,5-dihydroxy-2-imidazolidinone is shown in Formula 5 below.

  In Formula 5, hydroxyethyl groups at the 1- and 3-positions have reactivity with the cellulose molecules that make up the cell walls of the wood materials that make up each wooden part, forming a crosslinked structure between the cellulose molecules, and the cell wall strength It greatly contributes to improvement and dimensional stability. In addition, hydroxy groups at 4- and 5-positions are also reactive with cellulose molecules to form a cross-linked structure between cellulose molecules. Furthermore, these hydroxyethyl or hydroxy groups also react with the high molecular weight resin obtained by self-polymerizing the prepolymerization product of the chemical formula 1 into the cell cavity, cell gap and cell wall of the wood material constituting each wooden part. It also plays a role in linking the loaded resin to the cell wall. As a result, the strength of the cell wall of the wood material constituting each wooden part is enhanced and the cell wall is filled with the cell cavity, cell gap and cell wall, and the dimensional stability and surface hardening of the produced wood decorative sheet are well achieved. Be done.

  Next, in the present invention, glycols constituting the third component of the treatment liquid are dihydric alcohols, and examples thereof include ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, 1,3-butadiene, and the like. Various ones such as butylene glycol, trimethylene glycol, hexamethylene glycol and the like can be used. Further, in the present invention, monoethers of the above glycols are also included as long as they have hydrophilicity.

  In the present invention, in particular, alkylene glycols having an alkyl group having 3 to 8 carbon atoms are preferable as glycols, and among these, dipropylene glycol is more preferable.

  When these glycols are used in combination as the third component of the treatment liquid, the hydroxyl group of the glycols reacts with the aldehyde group of the first component or the hydroxyl group of the second component, the hydroxymethyl group or the hydroxyethyl group, It will contribute to the crosslinking effect. Further, in the present invention, even when glycols are used in combination, by the first component and the second component being contained, no stickiness due to the unreacted substance remains.

  Furthermore, when glycols are used in combination as the third component of the treatment liquid, it can also react with the adhesive for bonding each wooden part. By this, each component (the first component, the second component and the third component) of the treatment liquid filled and cured inside each component reacts with the adhesive, and the adhesion between the components becomes stronger.

  A catalyst is used in combination with each reaction of the first component, the second component and the third component described above. As the catalyst, protic acid or Lewis acid is used. For example, zinc chloride, magnesium chloride, phosphoric acid, p-toluenesulfonic acid, various organic amine hydrochlorides and the like can be used. The type and amount of use of these catalysts are appropriately adjusted according to the reaction temperature and reaction time.

  On the other hand, in the present invention, it is also possible to dye and use the woody material constituting each wooden part. In this case, the dyeing process may be carried out by immersing in a dyeing bath at 80 ° C. to 95 ° C. for several dozen minutes to several hours, as long as the method used in ordinary wood processing may be used. Here, as a dye to be used in the dyeing process, any dye can be used as long as it is a dye capable of dyeing on a woody material, but in general, it is preferable to use an acid dye or the like. In addition, reactive dyes that react with cellulose and lignin in wood materials can also be used. In the present invention, the dimensional stabilization treatment with the above-described agent for dimensional stabilization treatment and the dyeing treatment using a dye can be simultaneously performed.

  In the present invention, it is also possible to bleach and use the woody material that constitutes each wooden part. The bleaching treatment may be carried out by immersing in a bleaching bath at 15 ° C. to 30 ° C. for several dozen minutes to several hours in general, using a method used in ordinary wood processing. Alternatively, in the case of a thin veneer, the surface may be brushed with a bleaching solution for bleaching. Further, in the present invention, the bleaching treatment may be performed before the treatment solution impregnation of the above-described chemical for the anti-combustion treatment and the chemical for the dimension stabilization treatment. As a bleaching agent used for this bleaching process, a hydrogen peroxide solution etc. are generally used.

  Wood decorative laminates made from woody materials that have been subjected to dimensional stabilization as described above, even when made extremely thin and scraped (slip board), warps and twists and other irregularities occur and decorative patterns appear It does not collapse and the wooden decorative thin plate does not break. In addition, since the plate can be made extremely thin in this way, it is possible to meet the standards of non-combustibility and semi-non-combustibility according to the Building Standard Act without applying any flameproofing treatment. Specifically, the thickness of the wood decorative thin plate scraped extremely thinly by grinding or the like after grinding or grinding is within the range of 0.10 to 0.50 mm, preferably 0.10 to 0.30 mm. It is preferable to be in the range of

  When the thickness of the wood decorative thin plate is in the range of 0.10 to 0.50 mm, a non-combustible material (as disclosed in Ministry of Construction Notification No. 1400 of the Ministry of Construction 2000) is used as a surface decorative material for a natural rattan sheet using this wood decorative thin plate. In a state of being affixed to the surface of the exemplified “steel and metal plate etc.” or a semi-combustible material (“gypsum board etc. exemplified in Ministry of Construction Notification No. 1401 first and second item in 2000”) In the heat generation test with a corn calorimeter (according to ISO 5560-1: 2002) performed, the standard of incombustible material or quasi incombustible material can be met.

Here, the configurations of the cosmetic noncombustible material and the cosmetic quasi-noncombustible material according to the present invention will be described. The cosmetic noncombustible material is constructed by a construction in which the natural cocoon sheet according to the present invention is attached to the surface of the above noncombustible material (such as steel and metal plate) at a construction site. In addition, before using a cosmetic noncombustible material at a construction site, a natural rattan sheet may be attached to the surface of the noncombustible material in advance. In addition, the decorative quasi-incombustible material according to the present invention is constructed by affixing the natural cocoon sheet according to the present invention on the surface of the aforementioned quasi-combustible material (such as gypsum board) at a construction site. In addition, before using a decorative non-combustible material at a construction site, a natural rattan sheet may be attached to the surface of the above non-combustible material in advance. A construction adhesive is used for these constructions. The type of the construction adhesive is not particularly limited, but in the case of an organic substance, it is necessary to control the organic mass (mass of organic substance per unit area: g / m ² ) to a predetermined value or less is there.

  Moreover, the smallpox sheet | seat which concerns on this invention is demonstrated. The natural rattan sheet is constructed by bonding a backing material to the back surface of the above-mentioned thin wood decorative sheet. Although the raw material which comprises a backing material is not specifically limited, In the case of organic quality, it is necessary to control the organic mass to below predetermined value. Moreover, when using an adhesive for adhesion | attachment of a wood decorative thin plate and a backing material, the kind is not specifically limited, However, It is necessary to control the organic mass of an adhesive below to predetermined value.

Here, the organic mass (g / m ² ) will be described. In order to receive the approval of the Minister of Land, Infrastructure, Transport and Tourism as a non-combustible material or a quasi-non-combustible material in the Building Standard Law, it passes either the non-combustibility test or the heat generation test, and Is required to be less than or equal to a predetermined value. The total mass of the organic compounds in the cosmetic layer is referred to as the organic mass. The organic mass of the decorative layer is set to 400 g / m ² or less when a wood-based material or the like is applied to the surface of the base material.

However, in the case of woody materials having an organic mass of about 400 g / m ² , it is necessary to apply a flameproofing treatment to pass the non-combustibility test or the heat generation test, and it is greatly processed with processing difficulties. It leads to the rise of cost. Therefore, in the case of using a wood decorative thin plate which has not been subjected to a flameproofing treatment on the surface of the base material, it is necessary to make it extremely thin by abrasion processing (sticking board) or grinding processing after abrasion processing. However, when the wood decorative thin plate is manufactured to be extremely thin, a gap or peeling occurs between the wood decorative thin plate and the base material. In particular, in the case of a wood decorative thin plate having a geometric pattern such as a pattern of parquet or parquet having excellent designability, a deviation such as warping or twisting occurs, the pattern of decorative processing is broken, and the thin wood decorative plate is broken. Peeling of a decorative thin plate and a base material will arise.

  On the other hand, the wood decorative thin plate used for the natural cocoon sheet according to the present invention is subjected to a high degree of dimensional stabilization treatment and has a thickness in the range of 0.10 to 0.50 mm. Thus, it is possible to provide a surface decorative material that meets the standards of non-combustible materials or semi-non-combustible materials without applying a flameproofing treatment.

However, the performance of the wood decorative thin plate used for the smallpox sheet according to the present invention is not the only one that meets the standards of noncombustible materials or semicombustible materials. Therefore, the organic mass constituting the cosmetic noncombustible material and the cosmetic quasi-noncombustible material according to the present invention is important. In the present invention, a wood decorative sheet, a surface coating agent for the wood decorative sheet, a backing adhesive for bonding the wood decorative sheet to a backing material, a backing material, and a natural cocoon sheet composed of these are used as noncombustible materials or semicombustible materials. The organic mass which is the total of the construction adhesives used when sticking on the surface of a material shall be 200 g / m < ² > or less.

  As a result, it is made from wood material which has been subjected to dimensional stabilization treatment without being subjected to a flameproofing treatment, and is naturally produced using a wood decorative thin plate having a geometric pattern such as a koshiko pattern or a parquet pattern having excellent designability. Even when the eyelid sheet is used as a surface cosmetic, it can meet the standards of noncombustible materials or semicombustible materials.

  Next, a method of producing a wood decorative thin plate used for the natural cocoon sheet according to the present invention will be described. In addition, the preparation methods of the wood-made decorative thin plate used for the natural cocoon sheet | seat which concerns on this invention are not limited only to the following example. The method of producing a wood decorative thin plate includes a treatment liquid adjusting step of adjusting a treatment liquid to be treated to a woody material, a drug impregnation step, a decorative thin plate forming step, and a drug reaction step. These steps are described below.

A. Treatment liquid adjustment process (preparation process)
In this preparation step, the treatment liquid to be impregnated into the woody material constituting each wooden part is adjusted. Specifically, the first component, the second component, and the catalyst of the above-described chemical agent for dimensional stabilization treatment are blended to adjust the treatment liquid. Also, if necessary, the third component of the drug for dimensional stabilization treatment is blended. The agent for dimension stabilization treatment is a water-soluble substance having many hydrophilic groups, including the initial polymerization product of the first component, and the treatment liquid is preferably an aqueous solution. Further, if necessary, a solvent other than water, for example, an alcohol such as isopropyl alcohol may be partially blended in the treatment liquid. In the case where the treatment liquid is an aqueous solution, the drying treatment and the washing treatment to be performed as needed become easy, and the working environment becomes good. When the dimensional stabilization treatment and the staining treatment are simultaneously performed, the dye is blended in the treatment liquid.

  The amount of the agent for dimension stabilization treatment applied to the wood material constituting each wooden part may be appropriately adjusted depending on the type and shape of the wood material. For example, the application amount of the drug for dimensional stabilization treatment is within the range of 8% to 80% in weight increase ratio to the dry weight of the wood material by the solid content of the drug for dimensional stabilization treatment after the drug reaction step (described later). It is preferable to When the solid content of the drug for dimensional stabilization treatment applied to the woody material is within the above range, filling of the woody material into the cell lumen, cell gap and cell wall, crosslinking between cellulose molecules constituting the cell wall, etc. Will be done well. As a result, the dimensional stability of the wood decorative sheet is sufficiently achieved.

  On the other hand, the blending ratio of each component of the dimension stabilizing treatment agent in the treatment liquid may be appropriately adjusted according to the type and shape of the wood material. For example, in the case of a treatment liquid in which the first component and the second component are blended, it is preferable that the second component is in the range of 3 to 6, assuming that the first component is 1 by the solid content ratio (weight ratio). And the second component is more preferably in the range of 4 to 5. In addition, when the third component is added to this treatment liquid, if the first component is 1 by the solid content ratio (weight ratio), the second component is in the range of 3 to 6, and the third component is 2 It is preferable that the second component is in the range of 4 to 5 and it is more preferable that the third component is in the range of 3.5 to 4.5. .

  When the blending ratio of each component of the dimension stabilizing treatment agent in the treatment solution is within the above range, the filling of the wood material into the cell lumen, cell gap and cell wall, and crosslinking between cellulose molecules constituting the cell wall The crosslinking between the polymer of the first component or the polymer of the first component and the third component and the crosslinking between the polymer and the cellulose molecules constituting the cell wall can be performed more efficiently.

B. Drug Impregnation Step In this drug impregnation step, the wood material constituting each wooden part is impregnated with the treatment liquid (blended with a dye if necessary) prepared in the treatment liquid adjustment step. Impregnation methods include methods used in various treatments of wood materials, such as coating method, spraying method, immersion method, normal pressure treatment method such as hot and cold bath method, vessel method, lumbering method, lorry method, dry method There are pressure treatment methods such as injection method, pressurized injection method, and reduced pressure injection method. In the present invention, the pressure reduction / pressure alternation method (OPM method) is preferable in order to sufficiently impregnate the treatment solution into the cell lumen, cell gap and cell wall through the passage of the wood material.

  Specifically, after loading wood material into a pressure vessel which is an impregnating device, the inside of the device is depressurized to degas the air existing in the cell lumen, cell gap and cell wall of the wood material. After that, the treatment liquid is supplied into the apparatus under reduced pressure, and the wood material is immersed in the treatment liquid. Next, by gradually pressurizing the inside of the device and maintaining the pressurized state for a predetermined time, the treatment liquid can be sufficiently impregnated into the cell lumen, cell gap and cell wall of the wood material.

  The amount of impregnation of the treatment liquid into the wood material varies depending on the content of each component in the treatment liquid and the void volume of the wood material, but in the present invention, usually 60% to 400% with respect to the weight of the wood material It is preferable to set it in the range of

  In this impregnation step, even if the treatment liquid contains a catalyst, the reaction of each component of the dimension stabilizing treatment agent does not proceed, and the reactivity remains. As a result, the treatment liquid remaining in the impregnating device without being impregnated in the cell cavity, cell gap and cell wall of the wood material can be recovered and reused in the next impregnation step.

C. Wood veneer sheet forming process In this wood veneer sheet forming process, first, a wood veneer element or a wood piece for forming a geometric pattern such as a batik pattern or a parquet pattern from a wood material impregnated with a treatment liquid in the chemical impregnation process. Produce wooden parts such as parts or wooden parquet parts. At this stage, the agent for dimension stabilization treatment in the treatment liquid impregnated in the woody material is in an unreacted state, and the woody material is in a raw wood state (state containing water in the treatment liquid) and it is flexible. It is easy to make each part. In addition, when using natural wood grain as a decorative material as a wooden decorative thin plate, a veneer may be generally used.

  For example, in the case of braid, a plurality of manufactured wooden braid components are assembled to form a skeleton of braid. A plurality of voids are present in the portion other than the skeleton in the formed stem. Next, a wooden piece piece of wood is prepared to fit into these gaps. Specifically, wooden piece parts are produced that conform to the shape of each void. These piece parts may be made of the same woody material as the wooden piece part or may be made of woody materials of different wood species. In addition, these wooden piece parts are also produced from the woody material which impregnated the process liquid at the chemical | medical agent impregnation process. Therefore, the impregnated agent for size stabilization treatment is in an unreacted state, and the wood material is in a green state.

  In addition, it is preferable that these wood piece parts be made to have a unique grain pattern or color on their surface. Furthermore, as these wooden piece parts, it is possible to use a parquet manufactured from a parquet block described later. In this way, the appearance of wood grain patterns, colors, or parquet patterns on the surface of the piece of wood piece makes the finished pattern of the fabric more complex and more beautiful.

  Next, a patterned block of a geometric pattern is produced from the plurality of wooden parts produced. For example, in the case of Kumiko, a Kamaboko-shaped block is manufactured from the plurality of wood Kumiko parts and wood piece parts manufactured in the above-described wood-made decorative thin plate forming process. On the other hand, in the case of parquet, a parquet-patterned block is produced from the plurality of wooden parquet parts produced in the above-described wood-made thin plate forming step.

  First of all, in preparation of a gossamer-patterned block, the prepared wooden piece part is fitted into each void of the set and glued to the framework of the wooden gossy part. On the other hand, in the preparation of the parquet pattern, the prepared wooden parquet parts are adhered to each other according to the parquet pattern. As described above, it is recommended to use the ones that do not require high temperature treatment for the adhesion reaction, as described above, for bonding of the wooden component and the wooden piece component, and for bonding of the wooden parquet components, Also in the above stage, it is preferable that the chemical agent for size stabilization treatment impregnated in each part is in an unreacted state, and the wood material is in a green state. From this, it is preferable to use a wet-curable urethane resin adhesive which is a kind of isocyanate adhesive.

  A box press for design can be used to bond the wooden stem parts to the wooden piece parts and to bond the wooden parquet parts to each other. In this box press for design, a plurality of press devices are attached to the front, rear, left, and right (right and left sides) of a rectangular frame, and an adhesive is applied to the inside to temporarily assemble a wooden braided component And wooden piece parts or wooden parquet parts are arranged, and pressed while confirming the pattern or size of the pattern or the pattern of the blocks to produce blocks of patterned blocks and blocks of the pattern. By using this box press for design, it is possible to construct a complicated gossack pattern or a parquet pattern as designed without requiring a high level of craftsmanship.

  On the surface of the block made in this way, the frame pattern of the wooden piece part and the grain pattern and color of the surface of the piece piece are combined to express a beautiful piece pattern. In addition, on the surface of the parquet-patterned block, a beautiful parquet pattern is expressed by combining the woodgrain pattern and color of each wooden parquet component.

  In this manner, the bonding of the respective components is completed in a state in which pattern blocks such as a square block or a parquet block are pressed in a design box press. For this adhesion, as described above, by using an adhesive that does not require high-temperature treatment for adhesion reaction, it is possible to maintain the chemical agent for dimensional stabilization treatment impregnated in each part in an unreacted state. Thus, at this stage, the impregnated resin is still in the unreacted state, and the wood material is in the green state and is soft, as the pattern block such as the Koshiko pattern block and the parquet pattern block removed from the design box press Maintain sex.

  The contour of the geometric pattern is reflected in the planar shape of the pattern block produced in this manner. For example, a zigzag pattern appears as a shape at both end portions in the length direction in the arrow-patterned parquet pattern block.

  Next, the wood surface is made by scraping (sticking) to a predetermined thickness so that a geometrical pattern such as a square pattern of a square block or a square pattern of a square block is made to appear on the surface. Make a thin plate. Abrasive processing such as a conventional rotary lace or slicer may be used for abrading the patterned blocks such as the gojim patterned block and the parquet shaped block. In the present invention, the thickness to be abraded is in the range of about 0.2 mm to 0.8 mm.

  In the present invention, the thickness of the wood decorative thin plate is preferably in the range of 0.2 to 0.45 mm, preferably in the range of 0.2 to 0.3 mm. Therefore, when the thickness after the abrasion processing exceeds 0.45 mm or 0.3 mm, it is preferable to grind the surface by grinding or the like to a predetermined thickness or less. In addition, it is preferable for the stability of a geometric pattern (it mentions later) to perform a grinding process etc., after bonding a wood decorative thin plate to a backing material and performing as a natural rattan sheet.

  In the present invention, at this stage, each wooden part constituting the patterned block such as the textured block and the parquet-patterned block is strongly adhered by the adhesive. Therefore, in the pattern blocks such as the Koshiko pattern block and the parquet pattern block, each component is integrated and acts like a piece of wood. On the other hand, the chemical agent for dimension stabilization treatment impregnated in each part is in an unreacted state, and the wood material constituting each part is in a raw material state. Generally, it is said that the abrasion resistance of the green material is about 1⁄4 of that of the dry material in the abrasion process (sticking board). Therefore, in the case of the block and the pattern block, the individual parts are integrated, and the wood material constituting each part is in the green state, so that each part maintains the flexibility of the wood and cutting resistance Is small, and in abrading process, the pattern is not distorted or broken.

D. Drug reaction process In this drug reaction process, reaction hardening of the medicine for dimensional stabilization treatment impregnated inside with maintaining the beauty of the geometrical pattern of the wood decorative thin plate formed in the above-mentioned wood decorative thin plate forming process To complete.

  In the drug reaction step, the wood decorative thin plate is heat-treated in a heat treatment apparatus after drying or without drying, and reaction hardening of each component of the drug for dimension stabilization treatment is completed. In the present invention, it is usually preferable to carry out heat treatment after drying to a moisture content of about 10% by weight to 20% by weight. The heat treatment conditions for reaction hardening of the agent for dimension stabilization treatment may be appropriately selected depending on the thickness and shape of the veneer, the components of the agent for dimension stabilization treatment, and the type and amount of reaction catalyst used.

  By this reaction, the first component of the drug for dimensional stabilization treatment is self-polymerized and filled in the cell cavity, cell gap and cell wall of the wood material, and the second component crosslinks cellulose molecules of the cell wall. Improve the cell wall strength of woody materials. In addition, the first component reacts with the self-crosslinked resin, and the second component and the third component react to further achieve dimensional stability and surface hardening of the wood material. Furthermore, the adhesive that has reacted in the pattern block preparation step also reacts with each component (particularly, the third component) of the drug for dimension stabilization treatment, and this reaction proceeds further.

  From these facts, the wood decorative laminate manufactured according to the present invention has the following merits. For example, according to the measurement of the present inventors, the hardness of the wood decorative thin plate using the sapwood portion of cedar is 2.6 times as high as the untreated hardness according to the present invention. In addition, as a secondary effect of the present invention, the use of the above-mentioned drug for dimension stabilization treatment makes it possible to reduce burnt due to light on the surface of the wood decorative thin plate to 1/15 or less of that in the case of no treatment.

The natural cocoon sheet using the wood decorative sheet produced in this manner, and the cosmetic non-combustible material and the cosmetic semi-non-combustible material to which the natural cocoon sheet is attached will be specifically described by way of examples. Moreover, the organic mass (g / m < ² >) in each process is demonstrated. In addition, the natural cocoon sheet | seat which concerns on this invention, a cosmetics noncombustible material, and a makeup | decoration non-combustible material are not limited only to the following Example.

  In the first embodiment, a method for producing a decorative noncombustible material to which a natural cocoon sheet and a natural cocoon sheet using a wood decorative thin plate having a geometric pattern having a parquet pattern are attached will be described. In addition, the wood decorative thin plate used as a surface material in the present Example 1 is obtained by thinning and processing a parquet-patterned block made of cedar material. First, the preparation of a wood decorative thin plate having a geometric pattern with a parquet pattern will be described. 1 to 3 are diagrams showing production steps of a parquet-patterned wood decorative thin plate used in the first embodiment.

A. Process liquid adjustment process In the process liquid adjustment process of the present Example 1, the process liquid for processing the cedar material which performed the artificial drying process (kiln dry) was prepared with the prescription shown below. In the treatment liquid of Example 1, 62 g of an aqueous solution (solid content: 40% by weight) of a compound in which 2-imidazolidinone and glyoxal are reacted at an equimolar number as the first component of the drug for dimension stabilization treatment Per liter, and 280 g / l of an aqueous solution (solid content: 40% by weight) of 1,3-bis (hydroxymethyl) -4,5-dihydroxy-2-imidazolidinone as a second component; An aqueous solution containing 93 g / liter of propylene glycol (100% product) and 93 g / liter of magnesium chloride aqueous solution (solid content: 25% by weight) as a catalyst was prepared. The treatment liquid of Example 1 used a dye for dyeing in combination. In Example 1, a metal complex dye capable of being dyed in the same bath as the dimensionally stabilized processing agent was used.

B. Drug Impregnation Step In the drug impregnation step of Example 1, cedar wood was impregnated with a treatment solution in which a drug for dimensional stabilization treatment and a dye were blended. Specifically, cedar material was loaded into the impregnating device, and the inside of the impregnating device was maintained for 120 minutes under a reduced pressure of 25 mmHg. Then, the said process liquid was supplied in the impregnation apparatus, maintaining a pressure-reduced state, the cedar material was immersed in the process liquid, and it heated up to the process temperature of 80 degreeC. Next, the inside of the impregnating device was pressurized to 0.2 MPa and maintained in this state for 30 minutes, and further, the inside of the impregnating device was pressurized to 0.4 MPa and maintained in this state for 30 minutes. Furthermore, the interior of the impregnating device was pressurized to a maximum of 0.5 MPa, and the treatment liquid was impregnated into the cell lumen, cell gap and cell wall of cedar wood by pressure application (step liquid pressure method) for 60 minutes. The amount of impregnation at this time was about 330% with respect to the weight of the cedar wood. At this stage, hardening treatment (heat treatment) of the dimension stabilization treatment agent was not performed. On the other hand, dyeing with the dye is complete.

C. Wood Decorative Sheet Forming Process In the decorative sheet forming process according to the first embodiment, a cedar board (the resin is in an unreacted state and the wood material is in a green state) impregnated with the above-mentioned agent is of a predetermined size and shape To obtain a wood plate piece 11 having a long fiber direction of wood grain (see FIG. 1-1). A plurality of pieces of wood plate 11 are prepared, and a one-component wet-curable urethane resin adhesive (Y778W, manufactured by Miki Riken Kogyo Co., Ltd.) is applied to the side surface, laminated and bonded in a box press for design. 10 was produced (refer FIG. 1-2). The laminated plate 10 is integrally laminated by unifying the fiber direction of wood grain in the longitudinal direction of each wood plate piece 11.

  Next, the laminated board 10 was cut in a direction parallel to the longitudinal direction of the wood plate piece 11 to prepare a plurality of long wooden parquet parts 12. On the surface of the wooden parquet 12, a joint layer in which several pieces of wood planks 11 are stacked in parallel and a fiber direction of wood grain parallel to the joint layer are parallel to the longitudinal direction of the wooden parquet 12. It has appeared. On the other hand, another laminated board 10 produced in the same manner was cut in a direction perpendicular to the longitudinal direction of the wood plate piece 11 to prepare a plurality of wooden parquet parts 13. On the surface of this wooden parquet part 13, a joining layer in which a large number of wood pieces 11 are stacked in parallel and a fiber direction of wood grain parallel to this joining layer appear at right angles to the longitudinal direction of the wooden parquet part 13. ing.

  Thus, on the surface of the wooden parquet 12 and on the surface of the wooden parquet 13, respectively, the bonding layer in which the wood pieces 31 are stacked in parallel and the fiber direction of the wood grain parallel to the bonding layer are different from each other. It appears at an angle (in the first embodiment, at an orthogonal angle).

  Next, in FIG. 2 showing the second stage of production, a one-component wet-curable urethane resin adhesive (Y778W, manufactured by Miki Riken Kogyo Co., Ltd.) is applied to the side of the wooden parquet 12 and the side of the wooden parquet 13. Then, they were alternately joined in a design box press to obtain a parquet-patterned block 20 (see FIG. 2-1). On the surface of this parquet pattern block 20, a joint layer in which wood pieces 11 are stacked in parallel and a fiber direction of a grain parallel to this joint layer appear to be orthogonal to each other, and a complex parquet pattern is expressed It is done.

  In the parquet pattern block 20 in this state, the adhesion between the wooden parquet part 12 and the wooden parquet part 13 is completed by the wet curing of the one-pack type wet-curable urethane resin adhesive, but the treatment impregnated in each part The reaction curing of each resin component in the liquid has not been completed yet, and each component is in a green state containing each resin component and water (an aqueous solution of resin) and maintains flexibility.

  Here, it is also possible to thinly slice the parquet-patterned block 20 to obtain a parquet-patterned wood decorative thin plate in which a parquet-pattern appears on the surface. In Example 1, a more complex parquet pattern was expressed.

  The other marquetry block 30 is prepared in the same manner as the marquetry block 20 is prepared as described above. Like the parquet-patterned block 20, the parquet-patterned block 30 alternately joins the side of the wooden parquet 12 and the side of the wooden parquet 13 (see FIG. 2-2). However, the parquet-patterned block 20 and the parquet-patterned block 30 mutually change the joining order of the wooden parquet 12 and the wooden parquet 13 (see FIGS. 2-1 and 2-2).

  Next, a plurality of new wooden parquet parts 21 were prepared by cutting the parquet-patterned block 20 from one of the knives. Also, in the same manner, a plurality of new wooden parquet parts 31 were prepared by cutting the parquet-patterned block 30 from one of the knives. In each of the new wooden parquet part 21 and the new wooden parquet part 31, the joint layer in which the wood plate pieces 11 are laminated in parallel and the fiber direction of the wood grain parallel to this joint layer integrally constitute a grid On the left and right of the grid, grids in which the bonding layer and the fiber direction are orthogonal to each other are alternately represented. (Refer to FIGS. 2-1 and 2-2).

  Next, in FIG. 3 showing the final stage of production, a one-pack wet-curing urethane resin adhesive (Y778W, manufactured by Miki Riken Kogyo Co., Ltd.) on the side of the new wooden parquet part 21 and the side of the new wooden parquet part 31 ) Are applied and alternately joined with a laminating press to obtain a new parquetd block 40 (see FIG. 3-1). On the surface of this new parquet pattern block 40, the joint layer in which the wood plate pieces 11 are stacked in parallel and the fiber direction of the wood grain parallel to this joint layer integrally constitute a grid, before and after this grid On the left and right, grids in which the bonding layer and the fiber direction are orthogonal appear alternately to express a more complicated parquet pattern.

  In the new parquet pattern block 40 in this state, the adhesion between the new wooden parquet part 21 and the new wooden parquet part 31 is completed by the wet curing of the one-pack type wet-curable urethane resin adhesive, The reaction hardening of the dimension stabilization treatment agent in the treatment liquid impregnated in parts has not been completed yet, and each part is in a raw material state containing each drug component and water (water solution of the medicine) and it is flexible I keep it.

  Next, a wooden decorative thin plate is manufactured from the new parquet pattern block 40. In Example 1, a new parquet pattern block 40 was sliced to 0.4 mm by abrasion using a wood slicer to obtain a wood decorative thin plate 41 having a complex parquet pattern on its surface. As described above, the new parquet pattern block 40 is in the form of a piece of wood board, with each part firmly adhered by the one-component wet-curable urethane resin adhesive. On the other hand, as described above, the reaction curing of the dimension stabilization treatment agent is not yet completed, and each component is in a green state. By this state, each part maintains the flexibility of the wood, and the parquet pattern is not distorted or broken in the grinding by the slicer.

D. Drug Reaction Step In the drug reaction step of the first embodiment, the chemical agent for dimensional stabilization treatment impregnated into the thin sliced wood decorative thin plate 41 is reacted and cured while maintaining the beauty of the parquet pattern. Specifically, the wood decorative thin plate 41 was heat-treated at 120 ° C. for 3 minutes to complete the reaction of the dimension stabilization treatment agent, and the respective components were reacted and cured. In the first embodiment, the treatment liquid having the above-mentioned composition is impregnated, and the reaction hardening of these components does not change the size and the shape even if the wood decorative thin plate 41 is heat-treated.

  On the surface of the wood decorative thin plate of Example 1 obtained in this manner, a bonding layer in which wood plate pieces 11 made of cedar plate material are laminated in parallel and a fiber direction of grain parallel to the bonding layer are integrated. In this case, grids in which the bonding layer and the fiber direction cross each other appear alternately in front and back and left and right of this grid, and a more complex parquet pattern is expressed, and the texture, color and grain of tree species A geometric pattern having a high degree of designability is expressed by the change in fiber direction (see FIG. 3B). 4 to 6 show other examples (examples 1 to 3) of the parquet-patterned wood decorative thin plate having a geometric pattern.

  At this stage, the thickness of the wood decorative thin plate 41 is 0.4 mm, and the organic mass does not reach a sufficient value as a wood material which has not been subjected to the flameproofing treatment. Therefore, in the first embodiment, grinding is further performed (described later).

  Next, a method of producing a natural cocoon sheet using the thus-produced parquet-patterned wood decorative thin plate as a surface material will be described. FIG. 7 shows a cross-sectional view of the natural rattan sheet according to the first embodiment. In FIG. 7, the natural rattan sheet 50 is formed by laminating a wood decorative thin plate 41 as a surface material and a polyester non-woven fabric 51 as a backing material. The material and type of the backing material are not particularly limited. Although an adhesive is used for this lamination, in the present Example 1, fusion bonding was carried out by heat pressing using a heat-fusible polyethylene resin adhesive. The material and type of the adhesive are not particularly limited.

  The thickness of the wood decorative thin plate 41 at the stage of fusion bonding with the polyester non-woven fabric 51 was still 0.4 mm. Therefore, in the first embodiment, the surface of the wood decorative thin plate 41 in this state is thinly ground by grinding. Grinding may be performed by any method, but in Example 1, a belt sander was used. In addition, since the wood decorative thin plate 41 made of the parquet pattern is backed by the polyester nonwoven fabric 51 and subjected to the dimensional stabilization processing, the parquet pattern is not broken by the grinding process.

  In FIG. 7, the thickness of the wood decorative thin plate 41 after grinding was 0.2 mm. Moreover, the thickness of the polyester nonwoven fabric 51 was 0.15 mm. The wood decorative thin plate 41 after grinding may be surface-painted with a urethane paint or a natural paint. In this case it is necessary to take into account the organic mass of the surface paint. In addition, in the present Example 1, surface coating was not performed.

The organic mass of the natural cocoon sheet 50 in this state was as follows. The organic mass of the wood decorative thin plate 41 having a thickness of 0.2 mm was 73 g / m ² . In addition, the organic mass of the chemical | medical agent (resin, catalyst, dye, etc.) used by the dimension stabilization process is also contained in this value. Moreover, the organic mass of the polyester nonwoven fabric 51 of thickness 0.15mm used as a backing material was 19 g / m < ² >. In addition, the mass of inorganic substances, such as titanium dioxide which polyester fiber contains, is remove | excluded to this value. Furthermore, the organic weight of the polyethylene resin adhesive used for the fusion was 28 g / m ² . As a result, the organic mass of the natural cocoon sheet 50 could be configured at 120 g / m ² .

  Next, the construction which sticks the natural cocoon sheet | seat 50 produced in this way on incombustible material, and comprises a makeup noncombustible material is demonstrated. FIG. 8 shows a cross-sectional view of a cosmetic noncombustible material according to the first embodiment. In FIG. 8, in the cosmetic noncombustible material 60, a natural cocoon sheet 50 as a surface cosmetic material is attached to the surface of a metal plate 61 as a base material. The metal plate 61 is a non-combustible material exemplified in the notification No. 1400 of the Ministry of Construction in 2000.

In Example 1, in order to attach the natural cocoon sheet 50 to the surface of the metal plate 61, a construction adhesive was used. The material and type of the adhesive are not particularly limited. In addition, since the organic mass of the natural cocoon sheet 50 is 120 g / m ² or less as described above, in Example 1, the organic mass is 80 g / m ² or less, and a favorable adhesion effect can be obtained. A chloroprene rubber adhesive 62 was selected as a construction adhesive. Specifically, the organic mass of the chloroprene rubber-based adhesive 62 in Example 1 was 80 g / m ² . Thus, the organic mass of the cosmetic noncombustible material 60 could be 200 g / m ² .

Next, the nonflammability of the makeup noncombustible material 60 which concerns on the present Example 1 was evaluated. Evaluation was performed by the heat generation test by the corn calorie meter prescribed | regulated to ISO5560-1. The results of the heat generation test were such that the total calorific value for a heating time of 20 minutes was as good as 8 MJ / m ² or less, and met the standard of noncombustible materials.

  In the second embodiment, a method for producing a quasi-combustible non-combustible material to which a natural cocoon sheet and a natural cocoon sheet using a wood decorative thin plate having a geometric pattern with a parquet pattern similar to that of the above-mentioned Example 1 is attached. In addition, the wooden decorative thin plate used as a surface material in the present Example 2 is the same as the said Example 1, and it omits about the preparation method of a wooden decorative thin plate.

  First, a method of producing a natural cocoon sheet using the parquet pattern wood decorative thin plate produced in the same manner as in Example 1 as a surface material will be described. FIG. 9 shows a cross-sectional view of the natural rattan sheet according to the second embodiment. In FIG. 9, the natural rattan sheet 70 is formed by laminating a wood decorative thin plate 41 as a surface material and an aluminum hydroxide mixed paper 71 as a backing material. Although an adhesive is used for this lamination, in Example 2, fusion bonding was carried out by heat pressing using the same heat-fusible polyethylene resin adhesive as in Example 1 above. The material and type of the adhesive are not particularly limited.

  The thickness of the wood decorative thin plate 41 at the stage of fusion bonding with the aluminum hydroxide mixed paper 71 was still 0.4 mm. Therefore, in the first embodiment, the surface of the wood decorative thin plate 41 is thinly ground by grinding as in the first embodiment. In the grinding process, the same belt sander as in Example 1 was used. In addition, since the wood decorative thin plate 41 made of the parquet pattern is backed by the aluminum hydroxide mixed paper 71 and subjected to the dimensional stabilization treatment, the parquet pattern is not broken by the grinding process.

  In FIG. 9, the thickness of the wood decorative thin plate 41 after grinding was 0.2 mm. The thickness of the aluminum hydroxide mixed paper 71 was 0.10 mm. The wood decorative thin plate 41 after grinding may be surface-painted with a urethane paint or a natural paint. In this case it is necessary to take into account the organic mass of the surface paint. In addition, in the present Example 2, surface coating was not performed.

The organic mass of the natural cocoon sheet 70 in this state was as follows. The organic mass of the wood decorative thin plate 41 having a thickness of 0.2 mm was 73 g / m ² . In addition, the organic mass of the chemical | medical agent (resin and catalyst) used by the dimensional stabilization process is also contained in this value. The organic weight of the 0.10 mm-thick aluminum hydroxide-mixed paper 71 used as the backing material was 27 g / m ² . In addition, the mass of inorganic substances, such as aluminum hydroxide which aluminum-hydroxide mixed paper 71 contains, is remove | excluded to this value. Furthermore, it comprised so that the organic mass of the polyethylene resin adhesive used for melt | fusion might be 28 g / m < ² > or less. As a result, the organic mass of the natural cocoon sheet 70 could be configured at 128 g / m ² or less.

  Next, the construction which sticks the natural cocoon sheet | seat 70 produced in this way to incombustible material, and comprises a makeup | decoration quasi-incombustible material is demonstrated. FIG. 10 shows a cross-sectional view of a decorative non-combustible material according to the second embodiment. In FIG. 10, in the cosmetic non-combustible material 80, a natural cocoon sheet 70 as a surface cosmetic material is attached to the surface of a gypsum board 81 as a base material. The gypsum board 81 is a semi-combustible material exemplified in the notification No. 1401 of the Ministry of Construction in 2000.

In Example 2, in order to stick the natural cocoon sheet 70 to the surface of the gypsum board 81, a construction adhesive was used. In addition, since the organic mass of the natural cocoon sheet 70 is 128 g / m ² or less as described above, in Example 2, the organic mass is 72 g / m ² or less, and a favorable adhesion effect can be obtained. A starch-based adhesive 82 was selected as a construction adhesive. The composition of this starch-based adhesive 82 consisted of starch and ethylene vinyl acetate resin. Specifically, the organic mass of the starch-based adhesive 82 in Example 2 was 30 g / m ² . Thus, the organic mass of the cosmetic non-combustible material 80 could be 200 g / m ² or less.

Next, the noncombustibility of the decorative quasi-incombustible material 80 according to Example 2 was evaluated. Evaluation was performed by the heat generation test by the corn calorie meter prescribed | regulated to ISO5560-1. The results of the heat generation test were such that the total calorific value for a heating time of 20 minutes was as good as 8 MJ / m ² or less, and met the criteria of the quasi-combustible material.

  As described above, according to the present invention, the wood decorative thin plate having excellent designability due to the geometric patterns such as natural wood grain, wood pattern and parquet is laminated as a surface material to the incombustible material etc. In this case, it has wood texture, natural feeling, high-class feeling, secures practical physical properties and does not cause gaps or peeling, and high fire resistance even after construction without giving fire resistance treatment. It is possible to provide a natural chewing sheet having properties, and a cosmetic noncombustible material and a cosmetic quasi noncombustible material using the same.

In addition, in implementation of this invention, not only the said embodiment and said each Example but the following various modifications are mentioned.
(1) In the above embodiment, the wood decorative thin plate having the decorative property on the surface has been described as the wood decorative thin plate with a geometric pattern such as a gossip pattern or a parquet pattern, but the present invention is not limited thereto. It is also possible to use a wood decorative thin plate consisting of a normal veneer having the design property of the present invention, or a wood decorative thin plate having an excellent design property prepared by another manufacturing method.
(2) In the above-described Examples 1 and 2, the wood decorative thin plate having a geometric pattern with a parquet is used as the surface material of the natural cocoon sheet, but the present invention is not limited thereto. It is also possible to use a wood decorative sheet having a geometric pattern.
(3) In Examples 1 and 2 above, the wood decorative thin plate made of marquetry-patterned parquet (see FIG. 3) was used, but the present invention is not limited to this. You may make it use the wood-made decorative thin plate (refer FIGS. 4-6) etc. which it had.
(4) In Examples 1 and 2, although the surface coating was not applied to the wood decorative thin plate, the surface decorative may be applied to the wood decorative thin plate after grinding with a urethane based paint or a natural based paint. .
(5) In Examples 1 and 2, cedar wood was used as the wood material used as the starting material for the wood decorative thin sheet, but the present invention is not limited to this. For example, various kinds such as cypress, teak wood, pine wood etc. Tree species can be used.

11 ... Wood board pieces, 10 ... Laminated boards, 12, 13, 21, 31 ... Wooden parquet parts,
20, 30, 40 ... Parquet-shaped block, 41 ... Wood-made decorative sheet,
50: Natural rattan sheet, 51: Polyester non-woven fabric,
60: cosmetic noncombustible material, 61: metal plate, 62: chloroprene rubber adhesive,
70 ... makeup quasi-incombustible material, 71 ... aluminum hydroxide mixed paper,
80 ... Cosmetic quasi-combustible material, 81 ... gypsum board, 82 ... starch-based adhesive.

Claims (14)

Non-combustible materials (steel and metal plate etc.) exemplified in the Ministry of Construction Notification No. 1400 in 2000, or quasi incombustible materials (Gypsum board) exemplified in the Ministry of Construction notification No. 1401 No. 1 Etc.) as a base material, it is a surface cosmetic material applied to the surface,
It is made of a wood material that has been subjected to a dimensional stabilization treatment without being subjected to a flameproofing treatment, and a backing material is adhered to the back surface of a wood decorative thin plate having a decorative property on the surface,
A firewood sheet which conforms to the standard of non-combustible material or semi-non-combustible material in a heat generation test with a cone calorimeter according to ISO5560-1: 2002 measured in a state of being attached to the surface of the substrate.   The above-mentioned wood decorative thin plate is a wood dyed decorative thin plate produced from a wood material which has been subjected to the dimensional stabilization treatment and the dyeing treatment simultaneously without giving a flameproofing treatment. Natural rattan sheet.   The natural cocoon sheet according to claim 1 or 2, characterized in that the wood decorative thin plate is a normal veneer having natural wood grain as a decorative material. The wood decorative thin plate is made by scraping and thinning a pattern block formed so that a geometric pattern in which a plurality of wooden parts are combined appears on the surface so that the pattern appears on the surface,
The natural cocoon sheet according to claim 1 or 2, wherein a decorative process is applied to the surface of the thin wood decorative sheet by the pattern of the pattern block.   The natural cocoon sheet according to claim 4, wherein the geometric pattern is a parquet pattern or a kudzu pattern.   The natural cocoon sheet according to any one of claims 1 to 5, wherein the thickness of the wood decorative thin plate is in the range of 0.10 to 0.50 mm.   The natural cocoon sheet according to claim 6, wherein the wood decorative thin plate is scraped to the thickness by a grinding process or the like after abrading process or abrading process. The drug used for the dimensional stabilization treatment is
A first component comprising an addition product of a cyclic urea compound and glyoxal,
A second component consisting of 4,5-dihydroxy-2-imidazolidinone or a derivative thereof,
The natural cocoon sheet according to any one of claims 1 to 7, which further comprises a third component comprising glycols as required.   The first component comprises an addition product of 2-imidazolidinone and glyoxal, and is characterized in that 0.9 mole to 1.2 moles of glyoxal is added to 1 mole of 2-imidazolidinone. The smallpox sheet | seat of Claim 8 to.   The second component is 1,3-dimethyl-4,5-dihydroxy-2-imidazolidinone, 1,3-bis (hydroxymethyl) -4,5-dihydroxy-2-imidazolidinone, and 1,3- The natural cocoon sheet according to claim 8 or 9, comprising at least one selected from the group consisting of bis (hydroxyethyl) -4,5-dihydroxy-2-imidazolidinone.   The cosmetic noncombustible material which stuck the natural cocoon sheet | seat of any one of Claims 1-10 on the surface of the said noncombustible material as a surface decorative material.   The decorative quasi-combustible material which stuck the natural cocoon sheet | seat of any one of Claims 1-10 as a surface decorative material on the surface of the said quasi-combustible material. The total weight (g / m) of organic compound per unit area in the total amount of the wood decorative thin plate, the surface coating agent for the wood decorative thin plate, the backing adhesive for bonding the wood decorative thin plate to the backing material, and the total amount of the backing material ² )
In the case where it is totaled with the mass (g / m ² ) of organic compound per unit area of the construction adhesive required when sticking the natural cocoon sheet consisting of these on the surface of the above-mentioned incombustible material or semi-incombustible material cosmetic nonflammable according to claim 11, characterized in that a / m ² or less. The total weight (g / m) of organic compound per unit area in the total amount of the wood decorative thin plate, the surface coating agent for the wood decorative thin plate, the backing adhesive for bonding the wood decorative thin plate to the backing material, and the total amount of the backing material ² )
In the case where it is totaled with the mass (g / m ² ) of organic compound per unit area of the construction adhesive required when sticking the natural cocoon sheet consisting of these on the surface of the above-mentioned incombustible material or semi-incombustible material 13. A quasi-combustible non-combustible material according to claim 12, characterized in that it is not more than 1 / m ² .