JP5352068B2 - Heat insulating material and floor structure using the heat insulating material as a mold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulator which is not damaged as a defective even if sparks fly, and to provide a floor structure using the heat insulator as a form. <P>SOLUTION: The heat insulator 1 is produced by providing a heat insulation substrate layer 12 made of a plastic foamed body 2 such as polystyrene, and laminating resin impregnated nonwoven fabrics 10 which are impregnated with a phenol resin, on a single or both surfaces of the heat insulation substrate layer 12, as flame-retardant reinforcing sheets. According to the structure, even if sparks fly on the heat insulator 1, by virtue of the resin impregnated nonwoven fabrics 10 as the flame-retardant reinforcing sheets, the heat insulation substrate layer 12 is prevented from melting or burning. Further by virtue of increased strength, the heat insulator 1 is prevented from cracking or breaking when manually handled. Furthermore the floor structure &alpha; in which the heat insulator 1 is used as a form, dispenses with form disassembly work after placing concrete because the concrete is placed on the heat insulator 1. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

The present invention relates to a heat insulating material used in the field of construction or civil engineering, and a floor structure using the heat insulating material as a formwork.

Conventionally, various heat insulating materials installed on the floor of a building have been proposed (for example, Patent Document 1,
2). As such a heat insulating material, for example, a heat insulating material layer made of polystyrene foam material, an adhesive layer made of a urethane-based resin material formed on the lower surface of the heat insulating material layer, and a polyester formed on the lower surface of the adhesive layer A structure of a laminate composed of a reinforcing sheet layer made of a film is well known. Here, the polystyrene foam material constituting the heat insulating layer is heat insulating,
It has been widely used as a main material for heat insulating materials because it has excellent properties such as strength and lightness. Moreover, the reinforcing sheet layer disposed via the adhesive layer is provided to further increase the bending strength of the heat insulating material layer. And in such a configuration, the heat insulating material is disposed on a base structure constituted by a supporting work, a pier, and a butter erection, with the reinforcing sheet layer facing downward and the heat insulating material layer facing upward, Further, concrete is placed on the heat insulating material layer where the polystyrene foam is exposed. As described above, the concrete is placed on the polystyrene foam exposed surface of the heat insulating material with the reinforcing sheet layer facing downward and the heat insulating material layer facing upward. This is because of the poor adhesion, and by placing concrete on the heat insulating material layer, they can be bonded to each other to form a strong floor structure.

JP 2007-138443 A JP 2006-45996 A

However, at the construction site, sparks may occur during welding or pressure welding work,
Such sparks are scattered on the surface of the heat insulating material or the surface of a reinforcing sheet made of a polyester film or the like, so that the surface of the heat insulating material is melted or burned, which deteriorates the appearance of the heat insulating material or is fatal. There was a case where a defect occurred and the product could not be used. For this reason, in conventional construction sites, welding or pressure welding work is performed with great care so as not to scatter sparks on the surface of the heat insulating material, or a commercially available disaster prevention sheet is put on the heat insulating material in advance to melt or burn by sparks. Or was preventing. However, it is cumbersome and troublesome to consider the management of heat insulating materials during work such as welding, or to cover with a disaster prevention sheet every time the heat insulating material is used, which causes a significant decrease in work efficiency. Occurs.

Then, an object of this invention is to provide the heat insulating material which can solve the said problem. Furthermore, it aims at providing the floor structure which uses this heat insulating material as a formwork.

The present invention comprises a heat insulating base layer made of a plastic foam and a non-flammable or flame retardant sheet laminated on one or both sides of the heat insulating base layer, and the non-flammable or flame retardant sheet is non-flammable or A fiber sheet obtained by applying and / or impregnating a resorcinol resin to an organic fiber sheet to which a flame retardant is added, and the resorcinol resin applied and / or impregnated to the fiber sheet is a final stage of the curing process. are cured to the stage, the adhesive surface for bonding a heat insulating base layer of the surface of said fiber sheet, a hot-melt adhesive is a heat insulating material, characterized in that it is coated.

In such a configuration, even if, for example, a spark is generated during welding or pressure welding work at a construction site and the spark is scattered on the heat insulating material, it is difficult to form a non-combustible or flame retardant sheet on one or both surfaces of the heat insulating material. Since the flame retardant layer is present, the heat insulating base material layer, which is the main component of the heat insulating material, is not affected by sparks on the side where the flame retardant material layer is formed. In particular, when non-combustible or flame-retardant sheets are laminated on both sides of the heat insulating material, there is no limitation on the arrangement direction of the heat insulating material for storage management. In addition, since this heat insulating material is a laminated | stacked integral structure provided with the flame retardant material layer, it does not require the complicated operation | work which covers a disaster prevention sheet and protects the said heat insulating material one by one. The non-flammable or flame-retardant sheet has a configuration in which the organic fiber sheet to which a non-flammable or flame retardant is added is a fiber sheet obtained by applying and / or impregnating a resorcinol resin . With this configuration, the incombustible or flame-retardant sheet functions as a flame-retardant reinforcing sheet that reinforces the heat-insulating base material layer and prevents melting and the like against sparks. Thus, the strength in the thickness direction of the heat insulating material is improved, and even when a large area of the heat insulating material is transported or attached, it does not crack or break even if a bending moment acts in the thickness direction due to its own weight or the like. From the above, the incombustible or flame-retardant sheet according to the present invention functions as a flame-retardant reinforcing sheet. By the way, the incombustible or flame retardant sheet according to the present invention means at least a sheet having a property as flame retardant, and it is strictly whether the property of the sheet is incombustible or incombustible. There is no need to categorize. Therefore, the flame-retardant material layer made of a non-flammable or flame-retardant sheet is at least a flame-retardant layer, and of course may be non-flammable.

Moreover, since the said incombustible or flame-retardant sheet | seat is a fiber sheet by which the resorcinol type resin was apply | coated and / or impregnated, it can comprise the stable flame-retardant material layer. The fiber sheet coated and / or impregnated with resorcinol- based resin has at least a flame-retardant property, whereby the flame-retardant material layer can be configured. The fiber sheet may be coated with resorcinol- based resin, may be impregnated, or may be coated and impregnated. Since the resorcinol resin is good adhesion between the coating and / or impregnated fiber sheet and the concrete, the upper surface of the fiber sheet in which the resorcinol resin is applied and / or impregnation, pouring concrete directly be able to.

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The resorcinol- based resin coated and / or impregnated on the fiber sheet is cured to the C stage, which is the final stage of the curing process. By setting it as this structure, a flame-retardant material layer can be formed reliably.

Here, a hot melt adhesive is applied to an adhesive surface of the fiber sheet that adheres to the heat insulating base layer. By adopting such a configuration, even if the impregnated and / or applied resin is in a completely cured state and the adhesiveness between the fiber sheet and the heat-insulating base material layer is lowered, the fiber sheet can be easily insulated. It can be adhered to the surface of the material layer.

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Furthermore, the present invention is a floor structure using the heat insulating material according to claim 1 as a formwork, wherein reinforcement is provided above the heat insulating material, and concrete is cast on the heat insulating material. It is characterized by that. Since the floor structure of the present invention uses the above-described heat insulating material as a formwork, it does not require the formwork dismantling work that has been essential in the past after placing concrete.

In the heat insulating material according to the present invention, since the non-combustible or flame-retardant sheet is laminated on one side or both sides of the heat insulating base material layer, the heat insulating base material layer is not melted or burned by a spark or the like. In addition, the strength of the heat insulating material is improved. This makes it possible to perform welding or pressure welding work near the heat insulating material without using a disaster prevention sheet, and because it improves the handleability of the heat insulating material in terms of strength, it can improve the work efficiency of the construction site There is an effect.

Moreover, since the floor structure which concerns on this invention uses a heat insulating material as a formwork, there exists an advantage which does not need to dismantle a formwork after concrete placement.

[Incombustible or flame retardant sheet]
As the incombustible or flame-retardant sheet according to the main part of the present invention, a fiber sheet coated with and / or impregnated with a resorcinol resin is proposed. In addition, as said fiber sheet, a nonwoven fabric or a knitted fabric is selected suitably.

[Fiber sheet]
Examples of the fiber sheet include plant fibers such as kenaf fiber, hemp fiber, palm fiber, bamboo fiber, and abaca, polyester fiber, polyamide fiber, acrylic fiber, urethane fiber, polyvinyl chloride fiber, polyvinylidene chloride fiber, and acetate fiber. Organic synthetic fibers, wool, mohair, cashmere, camel hair, alpaca, vicuna, angora, biofibers made from lactic acid obtained from starch such as corn, rayon (human silk, sufu), polynosic fiber sheet made cupra, acetate, cellulosic artificial fibers, triacetate, from one or more kinds of organic fibers such as regenerated fibers obtained by fibrillating scrap this textile products using these fibers Or polyethylene, polypropylene, ethylene as all or part of the above fibers -Polyolefin fiber such as vinyl acetate copolymer and ethylene-ethyl acrylate copolymer, polyvinyl chloride fiber, polyurethane fiber, polyester fiber, polyester copolymer fiber, polyamide fiber, polyamide copolymer fiber and the like having a melting point of 180 The main thing is a fiber sheet using a low melting point fiber at a temperature of ℃ or less. The fiber sheet is a method of entanglement of the mixed fiber web sheet or mat by needle punching or a spunbond method, or the fiber web sheet or mat is made of the low melting point fiber, or the low melting point fiber is If mixed, the sheet or mat is heated to soften the low-melting fiber to form a binder, or the sheet or mat is impregnated with a synthetic resin binder or mixed and bound, or A method in which the mixed fiber web sheet or mat is entangled by needle punching, and the low melting point fiber is heated and softened to form a binder, or impregnated with the synthetic resin binder, and further bonded. It is manufactured by a method of knitting and the like.

[Resorcinol resin]
The resorcinol resin can be obtained by condensing a resorcinol compound or a resorcinol compound, a monohydric phenol, formaldehyde and / or a formaldehyde donor.

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(Monohydric phenol)
Examples of the monohydric phenol include phenol, o-cresol, m-cresol, p-
Alkylphenols such as cresol, ethylphenol, isopropylphenol, xylenol, 3,5-xylenol, butylphenol, t-butylphenol, nonylphenol, o-fluorophenol, m-fluorophenol, p-fluorophenol, o-chlorophenol, m-chloro Phenol, p-chlorophenol, o-bromophenol, m-bromophenol, p-bromophenol, o-iodophenol, m-
Iodophenol, p-iodophenol, o-aminophenol, m-aminophenol, p-aminophenol, o-nitrophenol, m-nitrophenol, p-nitrophenol, 2,4-dinitrophenol, 2,4,6 -Monohydric phenol substitution products, such as trinitrophenol, polycyclic monohydric phenols, such as naphthol, etc. are mentioned, These monohydric phenols can be used individually or in mixture of 2 or more types.

(Resorcinol compound)
Examples of the resorcinol compound include resorcin and alkyl resorcin. Particularly preferred is alkyl resorcin, which has a higher reaction rate with aldehyde than resorcin.

Examples of alkylresorcin include 5-methylresorcin, 5-ethylresorcin,
5-propyl resorcin, 5-n-butyl resorcin, 4,5-dimethyl resorcin, 2
, 5-dimethyl resorcin, 4,5-diethyl resorcin, 2,5-diethyl resorcin, 4,5-dipropyl resorcin, 2,5-dipropyl resorcin, 4-methyl-5-ethyl resorcin, 2-methyl-5 -Ethylresorcin, 2-methyl-5-propylresorcin, 2,4,5-trimethylresorcin, 2,4,5-triethylresorcin, etc.
An alkyl resorcinol mixture obtained by dry distillation of an Estonia oil shale is inexpensive and contains a large amount of highly reactive various alkyl resorcins in addition to 5-methylresorcin. Therefore, it is a particularly preferred resorcinol compound raw material in the present invention.
Among the resorcinol compounds, one or a mixture of two or more resorcinol compounds such as resorcin and alkylresorcin (including polyhydric phenol mixture obtained by dry distillation of Estonian oil shale) and aldehyde and / or aldehyde donation The resorcinol-based resin comprising a body is a desirable resin as the resorcinol-based resin of the present invention.

(Formaldehyde donor)
In the present invention, the resorcinol compound is condensed with formaldehyde and / or a formaldehyde donor, and the formaldehyde donor means a compound that forms and provides formaldehyde when decomposed or a mixture of two or more thereof. Examples of such aldehyde donors include paraformaldehyde, trioxane, hexamethylenetetramine, tetraoxymethylene and the like. In the present invention, formaldehyde and formaldehyde donor are collectively referred to as formaldehyde hereinafter.

(Production of resorcinol resin)
There are two types of the resorcinol-based resin. Resor obtained by reacting with an alkali catalyst with an excess of formaldehyde with respect to the resorcinol-based compound, and an acid catalyst with an excess of resorcinol with respect to the formaldehyde. There are novolaks obtained by reacting, and resole consists of a mixture of various resorcinol alcohols with resorcinol and formaldehyde added, usually provided in aqueous solution, and novolac is a variety of dihydroxydiphenylmethanes based on resorcinol further condensed with resorcinol. It consists of a derivative and is usually provided as a powder.
In the resorcinol-based resin used in the present invention, first or more of the resorcinol-based compound and formaldehyde are condensed to form an initial condensate, and the initial condensate is attached to the fiber sheet. The resin is formed by a curing catalyst and / or heating.

Further, in the present invention, a desirable resorcinol resin is a phenol-alkyl resorcin cocondensate (resorcinol resin). The phenol-alkylresorcin cocondensate is stable in an aqueous solution of the cocondensate (initial cocondensate) and is stored for a long time at room temperature as compared to a condensate (initial condensate) composed only of phenol. There is an advantage that you can. Further, the fiber sheet obtained by impregnating or applying the aqueous solution to the sheet base material and pre-curing is good, and the moldability is not lost even if the fiber sheet is stored for a long period of time. Furthermore, alkylresorcin has a high reactivity with formaldehydes and captures and reacts with a free aldehyde, so that it also has an advantage of reducing the amount of free aldehyde in the resin.
A desirable method for producing the phenol-alkylresorcin cocondensate is to first react phenol with formaldehyde to produce a phenolic resin initial condensate, and then add alkylresorcin to the phenolic resin initial condensate. If it becomes, it is a method of adding formaldehyde and reacting.

  For example, in the condensation of the above phenol and formaldehyde, usually 0.2 to 3 mol of formaldehyde and, if necessary, a solvent and a third component are added to 1 mol of phenol, and the liquid temperature is 55 to 100 ° C. Heat reaction for 8-20 hours. At this time, all the formaldehydes may be added at the start of the reaction, or may be added in divided portions or continuously.

  Furthermore, in the present invention, as the resorcinol-based resin, if desired, urea, thiourea, melamine, thiomelamine, dicyandiamine, guanidine, guanamine, acetoguanamine, benzoguanamine, and 2,6-diamino-1,3-diamine amino system An initial condensate composed of a resin monomer and / or the amino resin monomer may be added and co-condensed with the resorcinol compound and / or the initial condensate.

  During the production of the resorcinol-based resin, before, during or after the reaction, for example, hydrochloric acid, sulfuric acid, orthophosphoric acid, boric acid, oxalic acid, formic acid, acetic acid, butyric acid, benzenesulfonic acid, phenolsulfonic acid, para Inorganic or organic acids such as toluenesulfonic acid, naphthalene-α-sulfonic acid, naphthalene-β-sulfonic acid, esters of organic acids such as dimethyl oxalate, acid anhydrides such as maleic anhydride, phthalic anhydride, Ammonium salts such as ammonium chloride, ammonium sulfate, ammonium nitrate, ammonium oxalate, ammonium acetate, ammonium phosphate, ammonium thiocyanate, ammonium imidosulfonate, monochloroacetic acid or sodium salt thereof, organic halides such as α, α'-dichlorohydrin, Triethanolamine Acid salts, hydrochlorides of amines such as aniline hydrochloride, urea adducts such as urea adducts salicylate, urea stearate, urea adduct heptanoate, acidic substances such as N-trimethyltaurine, zinc chloride, ferric chloride, ammonia , Amines, sodium hydroxide, potassium hydroxide, barium hydroxide, hydroxides of alkali metals such as alkaline earth metals, hydroxides of alkaline earth metals such as lime, sodium carbonate, sodium sulfite, You may mix alkaline substances, such as weak acid salts of alkali metals, such as sodium acetate and sodium phosphate, as a catalyst or a pH adjuster.

The initial condensate (including the initial cocondensate) of the resorcinol resin of the present invention may be further mixed with a curing agent such as the above formaldehydes or alkylolated triazone derivatives.
The alkylolated triazone derivative is obtained by a reaction of a urea compound, an amine and formaldehyde. Examples of the urea compounds used in the production of alkylolated triazone derivatives include alkylureas such as urea, thiourea and methylurea, alkylthioureas such as methylthiourea, phenylurea, naphthylurea, halogenated phenylurea and nitrated alkyl. Examples thereof include urea alone or a mixture of two or more. A particularly desirable urea compound is urea or thiourea. In addition, amines such as aliphatic amines such as methylamine, ethylamine, propylamine, isopropylamine, butylamine and amylamine, amines such as benzylamine, furfurylamine, ethanolamine, ethylenediamine, hexamethylenediamine and hexamethylenetetramine, as well as ammonia. These are used alone or as a mixture of two or more. The formaldehydes used in the production of the alkylolated triazone derivative are the same as the formaldehydes used in the production of the initial condensate of resorcinol resin.
For synthesizing the alkylolated triazone derivative, usually 0.1 to 1.2 moles of amines and / or ammonia and 1.5 parts of formaldehydes are used per mole of urea compound.
The reaction is carried out at a ratio of ˜4.0 mol. In the above reaction, the order of addition is arbitrary, but as a preferred reaction method, first, a required amount of formaldehydes is charged into the reactor, and usually 60
Gradually add the required amount of amines and / or ammonia while keeping the temperature below ℃,
Furthermore, there is a method in which a required amount of a urea compound is added and the reaction is carried out by stirring and heating at 80 to 90 ° C. for 2 to 3 hours. As formaldehydes, 37% formalin is usually used, but a part thereof may be replaced with paraformaldehyde in order to increase the concentration of the reaction product. When hexamethylenetetramine is used, a reaction product having a higher solid content can be obtained. Reactions of urea compounds, amines and / or ammonia, and formaldehydes are usually carried out in aqueous solution, but instead of part or all of water, methanol, ethanol, isopropanol, n-butanol, ethylene glycol, diethylene glycol, etc. These alcohols may be used alone or as a mixture of two or more kinds, and water-soluble organic solvents such as ketones such as acetone and methyl ethyl ketone may be used alone or in combination of two or more kinds. The amount of the curing agent added is 10 to 100 parts by mass with respect to 100 parts by mass of the initial condensate (initial cocondensate) of the resorcinol resin of the present invention in the case of formaldehyde, and the resorcinol in the case of an alkylolated triazone derivative. 10 to 500 parts by mass with respect to 100 parts by mass of the initial condensate (initial cocondensate) of the resin.

(Sulfomethylation and / or sulfimethylation of resorcinol resin)
In order to improve the stability of the water-soluble resorcinol resin, it is desirable that the resorcinol resin is sulfomethylated and / or sulfimethylated.

(Sulfomethylating agent)
Examples of sulfomethylating agents that can be used to improve the stability of water-soluble resorcinol resins include sulfite, bisulfite or metabisulfite, alkali metals, quaternary amines such as trimethylamine and benzyltrimethylammonium, or quaternary amines. Examples thereof include water-soluble sulfites obtained by reacting with secondary ammonium and aldehyde adducts obtained by reacting these water-soluble sulfites with aldehydes. Examples of the aldehyde adduct include formaldehyde, acetaldehyde, propionaldehyde, chloral, furfural, glyoxal, n-butyraldehyde, caproaldehyde, allylaldehyde, benzaldehyde, crotonaldehyde, acrolein, phenylacetaldehyde, o-tolualdehyde, salicylaldehyde, etc. An aldehyde adduct composed of formaldehyde and sulfite is, for example, hydroxymethanesulfonate.

(Sulfimethylating agent)
Sulfimethylating agents that can be used to improve the stability of water-soluble resorcinol resins include aliphatic and aromatic aldehyde alkali metal sulfoxylates such as formaldehyde sodium sulfoxylate (Longalite) and benzaldehyde sodium sulfoxylate. Examples thereof include alkali metals such as sodium hydrosulfite and magnesium hydrosulfite, hydrosulfites (dithionates) of alkaline earth metals, and hydroxyalkanesulfinates such as hydroxymethanesulfinate.

  When the above-mentioned resorcinol-based resin initial condensate is sulfomethylated and / or sulfimethylated, a sulfomethylating agent and / or a sulfimethylating agent may be added to the initial condensate at an optional stage to form a resorcinol-based compound and / or an initial condensate. Is sulfomethylated and / or sulfimethylated. The addition of the sulfomethylating agent and / or the sulfymethylating agent may be performed at any stage before, during or after the condensation reaction.

  The total amount of the sulfomethylating agent and / or sulfymethylating agent is usually 0.001 to 1.5 mol with respect to 1 mol of the resorcinol compound. When it is 0.001 mol or less, the resorcinol resin is not sufficiently hydrophilic, and when it is 1.5 mol or more, the water resistance of the resorcinol resin is deteriorated. In order to satisfactorily maintain performance such as curability of the initial condensate to be produced and physical properties of the resin after curing, the content is preferably about 0.01 to 0.8 mol.

The sulfomethylating agent and / or sulfimethylating agent added to sulfomethylate and / or sulfmethylate the initial condensate reacts with the methylol group of the initial condensate and / or the aromatic ring of the initial condensate, A sulfomethyl group and / or a sulfimethyl group is introduced into the initial condensate.

  The aqueous solution of the initial condensate of the resorcinol-based resin thus sulfomethylated and / or sulfimethylated is stable in a wide range from acidic (pH 1.0) to alkaline, and can be used in any acidic, neutral or alkaline region. Can be cured. In particular, when cured on the acidic side, residual methylol groups are reduced, and the cured product is not decomposed to generate formaldehyde.

The resin used in the present invention further includes calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfate, calcium sulfite, calcium phosphate, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, magnesium oxide, titanium oxide, iron oxide, Zinc oxide, alumina, silica, diatomaceous earth, dolomite, gypsum, talc, clay, asbestos, mica, calcium silicate, bentonite, white carbon, carbon black, iron powder, aluminum powder, glass powder, stone powder, blast furnace slag, fly ash, Inorganic fillers such as cement and zirconia powder; natural rubber or its derivatives; styrene-butadiene rubber, acrylonitrile
Synthetic rubbers such as butadiene rubber, chloroprene rubber, ethylene-propylene rubber, isoprene rubber, isoprene-isobutylene rubber; polyvinyl alcohol, sodium alginate, starch, starch derivatives, glue, gelatin, blood powder, methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, polyacryl Water-soluble polymers such as acid salts and polyacrylamides and natural gums; organic fillers such as wood powder, walnut powder, coconut powder, wheat flour, and rice flour;
Higher fatty acids such as stearic acid and palmitic acid, higher alcohols such as palmityl alcohol and stearyl alcohol; esters of fatty acids such as butyryl stearate and glycerin monostearate; fatty acid amides; natural waxes such as carnauba wax, synthesis Waxes; mold release agents such as paraffins, paraffin oil, silicone oil, silicone resin, fluororesin, polyvinyl alcohol, grease; azodicarbonamide, dinitrosopentamethylenetetramine, P, P'-oxybis (benzenesulfonylhydrazide) Azobis-2,
Organic foaming agents such as 2 '-(2-methylgropionitrile); inorganic foaming agents such as sodium bicarbonate, potassium bicarbonate and ammonium bicarbonate; hollows such as shirasu balloon, perlite, glass balloon, foamed glass and hollow ceramics Granules: Plastic foams and foamed particles such as expanded polyethylene, expanded polystyrene, expanded polypropylene; pigments, dyes, antioxidants, antistatic agents, crystallization accelerators, flameproofing agents, water repellents, oil repellents, insect repellents , Preservatives, waxes, surfactants, lubricants, anti-aging agents, UV absorbers; phthalate plasticizers such as DBP, DOP, dicyclohexyl phthalate and other plasticizers such as tricresyl phosphate , May be mixed.

  The fiber sheet is coated and / or impregnated with resorcinol-based resin by immersing the fiber sheet in a liquid resin, a resin solution or a resin emulsion, or by applying with a knife coater, roll coater, flow coater or the like. Alternatively, in the case of powder, a resin is mixed into the fiber sheet to form a sheet. Furthermore, in order to adjust the amount of the resin composition in the resin-impregnated fiber sheet impregnated or mixed with the resin composition, the fiber sheet is squeezed using a squeeze roll or a press machine after impregnation, application or mixing. . In addition, the resorcinol-type resin may be apply | coated to the fiber sheet depending on the condition setting concerning a manufacturing method, may be impregnated, and may be apply | coated and impregnated.

[Non-燃又 the flame-retardant agent]
In addition, as the incombustible or flame retardant added to the fiber sheet , at least flame retardant can be employed, and halogen flame retardant, phosphorus flame retardant, nitrogen flame retardant, inorganic flame retardant, silicon Examples include at least one flame retardant selected from a flame retardant, a metal salt flame retardant, a fluorine flame retardant, and expanded graphite.

Examples of the halogen flame retardant include halogenated bisphenol, aromatic halogen compound, halogenated polycarbonate, halogenated aromatic vinyl polymer, halogenated cyanurate resin, halogenated polyphenylene ether, and the like. Decabromodiphenyl ether, tetrabromobisphenol A, tetrabromobisphenol A
Oligomers, brominated bisphenol-based phenoxy resins, brominated bisphenol-based polycarbonates, brominated polystyrene, brominated cross-linked polystyrene, brominated polyphenylene ether, polydibromophenylene ether, decabromodiphenyl ether bisphenol condensates, halogenated phosphates and Examples thereof include fluorine-based resins.

Examples of the phosphorus flame retardant include organic phosphorus compounds, red phosphorus, inorganic phosphates, and the like.

Examples of the organic phosphorus compound include phosphine, phosphine oxide, biphosphine, phosphonium salt, phosphinic acid salt, phosphate ester, phosphite ester, and the like. Specific examples thereof include triphenyl phosphate, methylneo Pentyl phosphite, pentaerythritol diethyl diphosphite, methyl neopentyl phosphate, phenyl neopentyl phosphate, pentaerythritol diphenyl diphosphate, dicyclopentyl high positive phosphate, dineopentyl hypophosphite, phenyl pyrocatechol phosphite, Ethyl pyrocatechol phosphite, dipyrro catechol high positive phosphate, phenoxypropoxyphosphazene, diphenoxyphosphazene, pheno Shi amino phosphazene, although phenoxy fluoroalkyl phosphazene, and the like, aromatic phosphoric acid ester monomer and condensate is preferable.

As the above-mentioned red phosphorus, in addition to general red phosphorus, the surface thereof is previously coated with a metal hydroxide film selected from aluminum hydroxide, magnesium hydroxide, zinc hydroxide, titanium hydroxide, Coated with a metal hydroxide selected from aluminum hydroxide, magnesium hydroxide, zinc hydroxide and titanium hydroxide and a thermosetting resin, aluminum hydroxide, magnesium hydroxide, zinc hydroxide, water Examples thereof include a film formed by double coating with a thermosetting resin film on a metal hydroxide film selected from titanium oxide.

Examples of the inorganic phosphate include ammonium phosphate and ammonium polyphosphate.

Examples of the nitrogen-based flame retardant include at least one kind composed of a triazine compound, a triazole compound, a tetrazole compound, a phosphazene compound, and a diazo compound. Specific examples include melamine, melam, melem, melon, melamine cyanurate, melamine phosphate, succinoguanamine, adipoguanamine, methylglutalogamine, melamine resin, BT resin and the like, and in particular, melamine cyanurate. Is preferred.

Examples of the inorganic flame retardant include silica, sodium sulfate, calcium sulfate, potassium sulfate, aluminum hydroxide, magnesium hydroxide, zirconium hydroxide, barium hydroxide, calcium hydroxide, dolomite, hydrotalcite, basic carbonate magnesium,
Tin oxide hydrate, aluminum oxide, iron oxide, titanium oxide, manganese oxide, magnesium oxide, zirconium oxide, zinc oxide, molybdenum oxide, cobalt oxide, bismuth oxide,
Chromium oxide, tin oxide, antimony oxide, nickel oxide, copper oxide, tungsten oxide, aluminum, iron, titanium, manganese, zinc, molybdenum, cobalt, bismuth, chromium,
Nickel, copper, tungsten, tin, antimony, SUS, zinc borate, zinc metaborate, barium metaborate, zinc carbonate, magnesium carbonate, calcium carbonate, barium carbonate,
Hydrated glass and the like are exemplified, and these can be used alone or in combination of two or more. Among these, aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, hydrotalcide, and hydrated glass are preferable.

Examples of the silicon-based flame retardant include a silicone compound and a silane compound.

Examples of the silicone compound include silicone oil which is polydiorganosiloxane, or a silicone resin formed by combining structural units such as SiO2, RSiO3 / 2, R2SiO, R3SiO1 / 2. In the structural unit, R represents a methyl group, an ethyl group, a propyl group, a phenyl group, a benzyl group, or a vinyl group. Specific examples include polydimethylsiloxane resin, polymethylphenylsiloxane resin, polydiphenylsiloxane resin, polymethylethylsiloxane resin, polycarbosiloxane, and mixtures thereof. These silicone resins have a number average molecular weight of 200 to 50,000.
A range of 00 is preferable, and the shape may be any of oil, varnish, gum, powder, and pellet.

Examples of the silane compounds include polyalkylsilane compounds, polycarbosilane compounds, and the like. Among these, polymethylphenylsilane, polydiphenylsilane, and polyphenylsilin are representative. These compounds may be terminated with either an OH group or an alkyl group, and may have a cyclic structure.

Examples of the metal salt flame retardant include organic sulfonic acid metal salts such as trichlorobenzene sulfonic acid metal salt, perfluorobutane sulfonate, diphenyl sulfone-3-sulfonic acid metal salt, aromatic sulfonimide metal salt, styrene ( Polystyrene sulfonic acid alkali metal salts and polyphenylene sulfones in which sulfonic acid metal salts, sulfate metal salts, phosphate metal salts, and borate metal salts are bonded to the aromatic rings of aromatic group-containing polymers such as co) polymers and polyphenylene ethers. Examples thereof include metal salt flame retardants such as acid metal salts. In addition, as a metal seed | species used for a metal salt, an alkali metal, alkaline-earth metal, Zn, Sn, Al, and Sb are suitable.

The fluorine-based flame retardant is a resin containing a fluorine atom in a resin, such as polymonofluoroethylene, polydifluoroethylene, polytrifluoroethylene, polytetrafluoroethylene, tetrafluoro / hexafluoropropylene copolymer, etc. Is exemplified.
Moreover, you may use together the monomer copolymerizable with the said fluorine monomer as needed. These fluorine resins preferably have an average molecular weight of 100,000 to 10,000,000.

As the expanded graphite, natural graphite is immersed in an inorganic acid such as concentrated sulfuric acid, nitric acid or selenic acid, and an oxidizing agent such as perchloric acid, perchlorate, permanganate, dichromate or hydrogen peroxide. It is obtained by adding and processing, and expansion start temperature is about 250 to 300 degreeC. The expanded graphite has an expansion volume of about 30 to 300 ml / g and a particle size of about 300 to 30 mesh.

[Heat-insulating base material layer made of plastic foam]
Examples of the plastic foam include foams of thermoplastic plastics such as foamed polystyrene, foamed polyurethane, and foamed polyethylene, and examples thereof include known materials that are employed as heat insulating materials.

[Insulation layer structure]
As shown in FIG. 3, the heat insulating material 1 according to the present invention includes a heat insulating base material layer 12 made of the plastic foam 2. Further, the adhesive layer 14 is formed on the upper and lower surfaces (both surfaces) of the heat insulating base layer 12.
Further, a flame retardant reinforcing sheet layer 15 is disposed in a laminated manner via the adhesive layer 14. The flame-retardant reinforcing sheet forming the flame-retardant reinforcing sheet layer 15 constitutes the non-flammable or flame-retardant sheet according to the present invention. Further, as will be described later, floor concrete is placed on the flame retardant reinforcing sheet layer 15 on the upper surface side.

By the way, the adhesion between the flame retardant reinforcing sheet of the flame retardant reinforcing sheet layer 15 and the heat insulating base material layer 12 can be formed using a known adhesive, for example, using a hot melt adhesive. May be. Examples of the hot melt adhesive include polyethylene, polypropylene,
Polyolefin resins such as ethylene-vinyl acetate copolymer and ethylene-ethyl acrylate copolymer, or modified products of the polyolefin resin, polyvinyl chloride, polyurethane,
Polyester, polyester polymer, polyamide, polyamide copolymer, cellulose derivative, polyvinyl ether, polyurethane, vinyl block copolymer, butyral, phenol resin, epoxy resin and the like, or a mixture of two or more thereof are used. As a method of applying the hot melt adhesive, a known application method is used. For example, powder (20-5
00 μm) of the hot melt adhesive by a scattering method, a powder dot method, a paste dot method, etc., and a hot melt adhesive in which the powdery hot melt adhesive is dispersed in water together with an appropriate thickener There are a method of spraying the dispersion, a method of spraying and spraying the molten hot melt adhesive, and the like.
It is also possible to employ a liquid adhesive, and examples of the liquid adhesive include initial condensates of thermosetting resins such as melamine resin, urea resin, phenol resin, tolylene diisocyanate, paraphenylene diisocyanate, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, hexamethylene diisocyanate, 1,4-naphthalene diisocyanate, 4,4′-diphenyl diisocyanate, 4,4′-diphenylmethane diisocyanate, 3,3′-dimethyl-4, 4'-diphenyl diisocyanate, 3,3'-dimethyl-4,4'-diphenylmethane diisocyanate, 3,3'-dimethoxy-4,4'-diphenyl diisocyanate, 2-chloro-1,4-phenyl diisocyanate, 1 -Chloro-2,4-pheny Njiisoshinato, m- phenylene diisocyanate, p- phenylene diisocyanate, 2,2 ', 5,5'-tetramethyl-4,
Polyvalent isocyanates such as 4′-biphenylene diisocyanate, m-xylylene diisocyanate, ω-xylylene diisocyanate, ω′-xylylene diisocyanate, and these compounds and polyethylene adipate, polytetrahydrofuran, 1,4-butanediol, 1, 4-cisbutenediol, 1,5-dihydroxyethoxynaphthalene, 1
, 4-butynediol, polyester, poly (oxypropylene) polyol, poly (oxyethylene-propylene) polyol, acrylic polyol, castor oil dimer, tall alcohol dimer and other polyhydric isocyanates such as adducts, urethane prepolymers Or the like is used.

[Floor structure]
Hereinafter, the floor structure α in which the heat insulating material 1 is used will be described with reference to FIG.
FIG. 1 shows a floor structure α according to the present invention. The floor structure α is a support member 8 such as a standing bundle and a plurality of types of horizontal supports supported horizontally by the support member 8. The floor foundation structure 7 which consists of material 7A-7D is comprised. Furthermore, on the floor foundation structure 7, as shown in FIG. 2, the heat insulating material 1 according to the present invention is cut out in advance as a plate material having a predetermined area, and a plurality of the heat insulating materials 1 are arranged and spread.
Further, a reinforcing bar 17 is provided on the heat insulating material 1, and then a concrete 18 is placed on the heat insulating material 1 so as to include the reinforcing bar 17. Here, in this floor structure α,
The said heat insulating material 1 functions as a formwork combined use heat insulation panel for slabs, and this heat insulating material 1 is used as a formwork. For this reason, this floor structure (alpha) does not require a formwork dismantling operation | work after laying the concrete 18. FIG.

Here, the concrete mainly includes, for example, an oxide of a mixture of one or a mixture of two or more of Portland cement, jet cement, blast furnace slag cement, fly ash cement, alumina cement, and the like, and an aggregate. Things can be proposed.

In addition, as shown in FIG. 3, the heat insulating material 1 according to the present embodiment includes a heat insulating base material layer 12 made of a plastic foam 2 made of polystyrene, and on both surfaces of the heat insulating base material layer 12, hot melt A resin-impregnated nonwoven fabric (non-combustible or flame-retardant sheet) 10 impregnated with the resorcinol-based resin is laminated via an adhesive layer 14 made of an adhesive 3 of type. The resin-impregnated nonwoven fabric 10 functions as a flame-retardant reinforcing sheet, and the resin-impregnated nonwoven fabric 10 constitutes the reinforcing flame-retardant sheet layer 15 of the heat insulating material 1.

The heat insulating material 1 is manufactured by the following manufacturing method.
The plastic foam 2 constituting the heat insulating base material layer 12 and the resin-impregnated nonwoven fabric 10 constituting the flame retardant reinforcing sheet layer 15 are made of a known hot melt adhesive powder 20 (melting point: 150 ° C. or less,
When bonding using preferably 80 ° C. to 130 ° C., as shown in FIG.
The resin-impregnated nonwoven fabric 10 is wound in advance as a bundle on a pair of upper and lower delivery rollers 25, 25, respectively. Note that the impregnation resin of the resin-impregnated nonwoven fabric 10, that is pre-cured dry oven until C-stage at (not shown) (completely cured). Furthermore, the hot-melt adhesive powder 20 is spread on the surface of the plastic foam 2 and the resin-impregnated nonwoven fabric 10 drawn from each winding bundle is laminated on both surfaces of the plastic foam 2 so that the resin-impregnated nonwoven fabric is laminated. 10 and the plastic foam 2 are simultaneously hot-pressed by the upper and lower pressing rollers 30A and 30B. The surfaces of the pressing rollers 30A and 30B are both set to 150 ° C. to 180 ° C., and the surface of the plastic foam 2 and the hot melt adhesive powder 20 are instantaneously pressed by the pressing rollers 30A and 30B during hot press molding. Thus, the plastic foam 2 and the resin-impregnated nonwoven fabric 10 are bonded to each other. In addition, since the plastic foam 2 starts foaming, melting, and deformation at about 100 ° C., it cannot apply a temperature of 100 ° C. or more for a long time. Therefore, the heating time by the pressing rollers 30A and 30B is set to an extremely short time. On the other hand, the resin of the resin-impregnated nonwoven fabric 10 is improved in hardness in proportion to the heating time and flame retardancy is improved, but since the heating time is limited as described above, in order to ensure the flame retardancy, As described above, it is desirable that the resin-impregnated nonwoven fabric 10 as a wound bundle is cured in advance to the C stage (fully cured state) or to an extent close thereto. Incidentally, the resin-impregnated nonwoven fabric 10 as Makitaba is cured until C-stage (completely cured), but the poor adhesion problem between the plastic foam body 2 during hot press molding, as described above By adopting the hot melt adhesive powder 20, the above problem of poor adhesion can be solved.
By the said manufacturing method, it becomes possible to obtain the heat insulating material 1 which formed the resin impregnated nonwoven fabric 10 (flame retardant reinforcement sheet) on the upper and lower sides of the plastic foam 2. In the heat insulating material 1, if the impregnating resin is in the A stage (pre-curing state) or the B stage (semi-curing state), the flame retardancy does not reach a required level, which is not desirable.

Further, as shown in FIG. 4, when the resin-impregnated nonwoven fabric 10 is laminated only on the upper surface (that is, only on one side) of the plastic foam 2, as shown in FIG. The press roll 30A is heated to about 150 ° C. to 180 ° C., and the lower press roll 30B in direct contact with the plastic foam 2 is set to room temperature. Thereby, the plastic foam 2 can be laminated without being deformed.

When a hot melt sheet is used for bonding, for example, a hot melt sheet extruded by a T-die is laminated on the plastic foam 2, and a resin-impregnated nonwoven fabric 10 is laminated on the plastic foam 2. Hot pressing may be performed. Alternatively, a hot melt adhesive may be applied and fixed to one side of the resin-impregnated nonwoven fabric in advance. Hot melt sheets and hot melt adhesive powders include, for example, polyolefin resins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer (
Low-melting point resin such as one or a mixture of two or more of polyurethane, polyester, polyester copolymer, polyamide, polyamide copolymer and the like can be used as the material.

In addition, the example of the heat insulating material 1 is illustrated below.
Example 1
A nonwoven fabric made of polyester fibers with a basis weight of 80 g / m ² by a spunbond method was used as a fiber sheet. Sulfomethylated phenol-alkylresorcin-formaldehyde initial condensate (solid content: 45 mass% aqueous solution) 40 parts by mass, carbon black (solid content: 3
0 part by weight aqueous dispersion) 1 part by weight, 2 parts by weight of fluorine-based water and oil repellent (solid content: 25% by weight aqueous solution), 5 parts by weight of nitrogen and phosphorus-containing flame retardant (solid content: 40% by weight aqueous dispersion) , Wax internal release agent (solid content: 40% by weight aqueous dispersion) 0.5 part by weight, Snowtex 20 (manufactured by Nissan Chemical Industries, Ltd .: SiO ₂ concentration 20% by weight aqueous solution, trade name) 20 parts by weight A mixed solution consisting of 31.5 parts by mass of water was prepared. The fiber sheet was impregnated with the roll by a roll so that the mixed solution was applied in an amount of 30% by mass with respect to the fiber sheet. Next, a polyamide copolymer (melting point: 130 ° C., particle size: 300 to 350 μm) powder as a hot melt adhesive is sprayed on one side of the resin-impregnated fiber sheet at a coating amount of 20 g / m ² , and then at 180 ° C. for 5 minutes. Resin-impregnated non-woven fabric (flame retardant), which is a flame retardant fiber sheet that is dried and the sulfomethylated phenol-alkyl resorcin-formaldehyde initial condensate is cured to C stage and at the same time the hot melt adhesive is melt-fixed to the fiber sheet A reinforcing sheet) was obtained. Next, one surface of polystyrene foam (thickness: 30 mm, density: 60 kg / m ³ ) by extrusion as an insulating material is polymerized on the surface coated with a hot-melt adhesive of a resin-impregnated nonwoven fabric, and upper and lower pressure rolls 30A,
The surface temperature of the pressure roll 30A in contact with the polymerization surface side of 30B is 150 ° C., the other pressure roll 30B is not heated and is kept at room temperature. A heat-insulating material in which a resin-impregnated non-woven fabric (flame retardant reinforcing sheet) fused to a polystyrene foam is bonded to one side
A) was obtained.

(Comparative Example 1)
In the polystyrene foam produced by the extrusion method of Example 1, a polyester film having a thickness of 0.05 mm was used as a reinforcing material, and 50 g of urethane adhesive was applied to one side of the polyester film.
A heat insulating material (B) in which a reinforcing sheet made of a polyester film is bonded to one side is applied at a coating amount of / m ² and adhered to the polystyrene foam using the same pressing rolls 30A and 30B as in Example 1. Obtained.

(Comparative Example 2)
The polystyrene foam itself used in Example 1 was used as the heat insulating material (C).

(performance test)
Table 1 shows the results of performance tests using Example 1 and Comparative Examples 1 and 2.

(Example 2)
A nonwoven fabric made of polyester fiber with a basis weight of 50 g / m ² by a needle punching method was used as a fiber sheet. Sulfimethylated phenol-alkylresorcin-formaldehyde initial condensate (solid content: 45 mass% aqueous solution) 40 mass parts, carbon black (solid content: 30 mass% aqueous dispersion) 1 mass part, fluorine-based water and oil repellent (solid content) : 25 wt% aqueous solution) 2 parts by mass, nitrogen, phosphorus-containing flame retardant (solid content: 40 wt% aqueous dispersion solution) 5 parts by weight, SNOWTEX C (manufactured by Nissan Chemical Industries, Ltd.: SiO ₂ concentration of 20% by weight aqueous solution , Trade name) A mixed solution consisting of 30 parts by mass and 22 parts by mass of water was prepared. The fiber sheet was impregnated with a roll so that the mixed solution was applied in an amount of 20% by mass with respect to the fiber sheet. Next, as a hot melt adhesive, a polyester copolymer (melting point: 135 ° C., particle size: 60 to 70 μm) 40 parts by mass, 10% polyvinyl alcohol aqueous solution 20 parts by mass, water 50 parts by mass,
After spray coating at a coating amount of 20 g / m ² as a solid content on one side of the resin-impregnated fiber sheet, 18
Resin impregnation which is a flame-retardant fiber sheet which is dried at 0 ° C. for 7 minutes, and the sulfimethylated phenol-alkylresorcin-formaldehyde initial condensate is cured to C stage and at the same time the hot melt adhesive is melt-fixed to the fiber sheet A nonwoven fabric (flame retardant reinforcing sheet) was obtained. Next, polystyrene foam (thickness: 30 mm, density:
A heat insulating material in which the resin-impregnated nonwoven fabric was bonded to one side of one side of 60 kg / m ³ ) was obtained. This heat insulating material was flame retardant (◎) and strength (◎), and had excellent performance.

(Example 3)
Non-woven fabric by chemical bond method made of polyester rayon fiber (thickness: 1.0m
m, basis weight: 150 g / m ² ) was used as a fiber sheet. 20 parts by mass of methylated trimethylol melamine resin (solid content: 60% by weight aqueous solution), fluorine-based water and oil repellent (solid content: 2)
5 mass% aqueous solution) 1 part by mass, nitrogen and phosphorus-containing flame retardant (solid content: 40 mass% aqueous dispersion) 3
Part by weight, Snowtex N (manufactured by Nissan Chemical Industries, Ltd .: SiO ₂ concentration 20% by weight aqueous solution, trade name), 30 parts by weight, water 44.6 parts by weight, and organic amine curing agent 1.4 parts by weight A mixture was prepared. The fiber sheet was impregnated with the roll by a roll so that the mixed solution was applied in an amount of 10% by mass with respect to the fiber sheet. Next, an ethylene-vinyl acetate copolymer (melting point: 110 ° C., particle size: 300 to 350 μm) powder as a hot melt adhesive is sprayed at a coating amount of 15 g / m ^{2 on} one side of the resin-impregnated fiber sheet and then 170 ° C. Resin-impregnated non-woven fabric (flame retardant reinforcing sheet), which is a flame retardant fiber sheet in which the methylated trimethylol melamine resin is cured to C stage and melted and fixed to the fiber sheet. ) Next, polystyrene foam (thickness: 30 mm) by extrusion as a heat insulating material
, Density: 60 kg / m ³ ), a heat insulating material was obtained in which the resin-impregnated nonwoven fabric was bonded to one side. This heat insulating material was flame retardant (◎) and strength (◎), and had excellent performance.

Example 4
A nonwoven fabric made of polyester fibers with a basis weight of 70 g / m ² by a needle punching method was used as a fiber sheet. Phenol-resorcin-formaldehyde initial condensate (solid content: 45 mass% aqueous solution) 40 mass parts, carbon black (solid content: 30 mass% aqueous dispersion) 1 mass part, fluorine-based water and oil repellent (solid content: 25 mass) % Aqueous solution) 2 parts by mass, nitrogen, phosphorus-containing flame retardant (solid content: 40% by mass aqueous dispersion) 5 parts by mass, Snowtex S (manufactured by Nissan Chemical Industries, Ltd .: SiO ₂ concentration 30% by mass aqueous solution, trade name) ) A mixed solution consisting of 20 parts by mass and 32 parts by mass of water was prepared. The fiber sheet was impregnated with the roll by a roll so that the mixed solution was applied in an amount of 25 mass% with respect to the fiber sheet. Next, an ethylene-vinyl acetate copolymer (melting point: 110 ° C., particle size: 300 to 350 μm) powder as a hot melt adhesive is sprayed at a coating amount of 20 g / m ^{2 on} one side of the resin-impregnated fiber sheet and then 170 ° C. Resin-impregnated non-woven fabric (flame retardant reinforcement) which is a flame retardant fiber sheet in which the phenol-resorcin-formaldehyde initial condensate is cured to C stage and melted and fixed to the fiber sheet at the same time. Sheet). Next, the surface of the polystyrene foam (thickness: 50 mm, density: 60 kg / m ³ ) obtained by extrusion as an insulating material is applied to both surfaces of the resin-impregnated nonwoven fabric with a hot-melt adhesive while the temperature is set to 150. 30 A of pressing rolls set to ° C
Bonding was performed at 30B (see FIG. 5) to obtain a heat insulating material in which a resin-impregnated nonwoven fabric (a flame-retardant reinforcing sheet) was bonded to both surfaces. This heat insulating material is particularly excellent in flame retardancy (◎) and strength (◎), and also has good handleability since a flame retardant sheet is adhered on both sides. Further, since the reinforcing sheet is fibrous unlike the conventional synthetic resin film, it has a very good adhesiveness to the cement at the time of placing the concrete and is a very excellent heat insulating material.

In addition, this invention is not limited to the said Example, In the range which does not deviate from the meaning of this invention, it can change suitably.

According to the heat insulating material of the present invention, for example, even if a spark is generated on a construction site and scattered on the heat insulating material, the heat insulating material does not become a defective product, so it is extremely useful and can be used industrially. Further, the floor structure of the present invention is useful in that work efficiency is dramatically improved without disassembling the formwork.

It is a general | schematic perspective view which shows floor structure (alpha). 1 is an external perspective view of a heat insulating material 1. FIG. It is a vertical side view of the heat insulating material 1 in which the resin-impregnated nonwoven fabric 10 which is a flame-retardant reinforcing sheet is formed on the upper and lower surfaces. It is a vertical side view of the heat insulating material 1 in which the resin-impregnated nonwoven fabric 10 which is a flame-retardant reinforcing sheet is formed only on the lower surface. It is a schematic explanatory drawing which shows the manufacture process of the heat insulating material 1 in which the resin impregnated nonwoven fabric 10 which is a flame-retardant reinforcement sheet | seat was formed in the upper and lower surfaces. It is a schematic explanatory drawing which shows the manufacture process of the heat insulating material 1 in which the resin impregnated nonwoven fabric 10 which is a flame-retardant reinforcement sheet | seat was formed only in the lower surface.

DESCRIPTION OF SYMBOLS 1 Heat insulating material 2 Plastic foam 10 Resin impregnation nonwoven fabric (incombustible or flame-retardant sheet)
12 Thermal insulation base material layer α Floor structure

Claims (2)

It consists of a heat-insulating base material layer made of plastic foam and a non-combustible or flame-retardant sheet laminated on one or both sides of the heat-insulating base material layer,
The incombustible or flame retardant sheet is a fiber sheet obtained by applying and / or impregnating a resorcinol-based resin to an organic fiber sheet to which an incombustible or flame retardant is added ,
The resorcinol-based resin applied and / or impregnated on the fiber sheet is cured to the C stage, which is the final stage of the curing process,
A hot melt adhesive is applied to the adhesive surface of the fiber sheet that adheres to the heat insulating base layer .
Heat-insulating material which is characterized a call. A floor structure using the heat insulating material according to claim 1 as a formwork, wherein reinforcement is provided on the upper side of the heat insulating material, and concrete is placed on the heat insulating material. And floor structure.

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