JPH05272226A - Tatami facing - Google Patents

Abstract

PURPOSE:To raise wear resistance and water-proofing function of a tatami facing as well as prevent the generation of harmful gases during incineration by a method in which the tatami is formed of a sheet or cloth composed of a polyolefin resin and a cross-linked rubber as given components and having a given surface hardness. CONSTITUTION:A tatami facing is formed of a sheet or cloth composed of 30-90wt.% polyolefin resin and 10-70wt.% cross-linked rubber, having a surface hardness of 80(Shore A press-in hardness) and 60(Shore D press-in hardness). Or, the sheet or cloth is laminated on a base cloth of cotton or jute to form the tatami. The tatami is then fixed to a floor of straw, cork, resin, or wood by using an adhesive or by sewing. The tatami having excellent wear resistance and excellent water-proofing function as well as excellent touch feeling, generating no toxic gases when incinerated, can thus be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a tatami mat, particularly a sheet or cloth of a resin composition excellent in abrasion resistance due to the use of a crosslinked rubber because it does not contain a halogen compound and is easy to incinerate. It is related to tatami mats. Further, by fixing the above-mentioned sheet or cloth to the base cloth, it is possible to provide a tatami table made of synthetic resin, which has excellent tensile strength and can be sewn.

[0002]

2. Description of the Related Art In recent years, tatami mats and mats have been made of synthetic resin for reasons such as ease of molding and lack of craftsmen, and then embossing or processing the synthetic resin into a straw shape. A chemical tatami mat is made using a so-called cloth, which is a combination of different materials. A typical example of these chemical tatami mats is one made of polyvinyl chloride, but since it uses a large amount of plasticizer, it causes stickiness due to its bleeding and produces toxic halogen gas when incinerated. Since such problems arise, alternative products have been desired. Attempts have been made to use polyolefin resins as an alternative to polyvinyl chloride, but the soft feel of tatami mats cannot be obtained with mere polyolefin resins, and if a plasticizer is used to impart flexibility, a plasticizer will be used. Since the amount of bleeding was excessive, it could not be used as a tatami mat. In addition, there is a drawback that only a polyolefin resin or rubber is extremely weak against abrasion.

[0003]

In view of the above points, the present invention is particularly excellent in abrasion resistance, has good workability, and can be burned even when compared with a mere polyolefin resin or rubber or a blend thereof. It is intended to provide a tatami mat that does not generate poisonous gas.

[0004]

Means for Solving the Problems The inventors of the present invention have made extensive studies in accordance with the above-mentioned object, and as a result, by adding a resin composition containing a polyolefin resin and a crosslinked rubber, excellent wear resistance and moldability can be obtained. Often, we have completed a tatami mat that does not generate toxic gas when incinerated. That is, the first aspect of the present invention
Is a sheet or cloth containing a resin component composed of (a) a polyolefin resin of 30 to 90% by weight and (b) a crosslinked rubber of 10 to 70% by weight, the surface hardness of which is Shore A indentation hardness 80 to Shore D indentation. A tatami mat having a hardness of 60 is provided.

The first aspect of the present invention will be described in detail below. The (a) polyolefin resin of the present invention means high / medium density polyethylene, high pressure low density polyethylene, linear low density polyethylene (LLDPE), ultra low density polyethylene (VLDPE), ethylene / α-olefin copolymer. Polyethylene resins such as ethylene-carboxylic acid unsaturated ester copolymers such as ethylene-vinyl acetate copolymers, ethylene-unsaturated carboxylic acid ester copolymers such as ethylene-ethyl acrylate and ethylene-ethyl methacrylate; Homopolypropylene, propylene / α-
Polypropylene resins such as olefin / block copolymers; poly-1-butene, copolymers of 1-butene and other α-olefins, poly-4-methyl-1-pentene, and the like. These may be used alone or in combination of two or more. Further, among these, it is preferable to use a mixture of an α-olefin (co) polymer having 3 to 8 carbon atoms and an ethylene (co) polymer. Examples of the α-olefin (co) polymer having 3 to 8 carbon atoms include polypropylene, poly-1-butene and poly-4-methyl-1-.
Examples include homopolymers of α-olefins such as pentene and poly-1-hexene, and mutual copolymers of these α-olefins. Of these, polypropylene resins are particularly preferable because they are inexpensive and have a good balance of physical properties such as rigidity and mechanical properties, heat resistance, and gloss and the like of the appearance of the molded product. More specifically, isotactic polypropylene, syndiotactic polypropylene,
A propylene-ethylene / block copolymer, a propylene-ethylene / random copolymer, a propylene-1-butene copolymer and the like can be used. The propylene content of the copolymer is preferably 60% or more of the polyolefin resin (A). Further, the above-mentioned (A) polyolefin-based resin may be partially modified with an acid or the like.

The (b) rubbery substance before crosslinking of the crosslinked rubber used in the present invention includes ethylene-propylene / random copolymer rubber, ethylene-propylene-diene / random copolymer rubber and the like ethylene. -Α-olefin copolymer rubber, natural rubber, isobutene rubber, butadiene rubber, and 1,2-polybutadiene rubber, which may be used alone or as a mixture. Among these, ethylene-propylene / random copolymer rubber and ethylene-propylene-diene / random copolymer rubber are preferable. These two rubbers have excellent thermoplasticity compared to other rubber-like substances and are easily dispersed by melt-kneading, and are compared with styrene-butadiene copolymer rubber (SBR), isoprene rubber, nitrile rubber, butadiene rubber, etc. Then,
Because it has no peculiar odor and can be obtained in pellet form, it is easy to measure and handle during compounding, and there is a large degree of freedom in selecting the type of composition manufacturing equipment. The reason is that it has the advantage of. Examples of the diene component of the ethylene-propylene-diene / random copolymer rubber include ethylidene norbornene, dicyclopentadiene, 1,4-
Any of cyclohexadiene and the like can be used.

The above rubber-like substance must be crosslinked before use. The degree of crosslinking is represented by boiling xylene insoluble matter, but the insoluble matter is preferably 5 to 80% by weight. If the degree of cross-linking is too low, the abrasion resistance will be poor, and if it is too high, blending with a polyolefin resin will be difficult. In the present invention, the term “crosslinking” is a concept that includes all states in which a linear polymer or a branched polymer is chemically bonded to another polymer, and includes conventionally performed vulcanization of rubber. As the crosslinked rubber of the present invention, 100 parts by weight of the above-mentioned rubber-like substance is added to 100 parts by weight of the (a) polyolefin resin.
It is preferable that the rubber is a rubber crosslinked by adding not more than parts by weight. In the present invention, the method for crosslinking the rubber-like substance is arbitrary, but it is desirable to use a crosslinking agent. The cross-linking agent can be arbitrarily selected according to the rubber-like substance to be used, but an ordinary radical-generating agent, for example, hydroperoxide, dialkyl peroxide, diacyl peroxide, peroxy ester, ketone peroxide, or the like which is generally commercially available, is used. You can More specifically, dicumyl peroxide, di-tert-butyl peroxide, 2,5-dimethyl-2,5-di (tert-butylperoxy) hexane, 2,5-dimethyl-2,5-di (tert- Butylperoxy) -3-hexyne, 1,3-bis (tert-butylperoxyisopropyl) benzene, azo compounds such as azobisisobutyronitrile, benzoyl peroxide, organic peroxides such as acetyl peroxide, iron ( II) Salt + peroxide, sulfite + persulfate, benzoyl peroxide + dimethylaniline and the like. Among these, 1,3-bis (tert-butylperoxyisopropyl) benzene is preferable in terms of odor and scorch stability.

In the present invention, dihydroaromatic compounds, ether compounds, tetrahydroaromatic compounds, cyclopentane compounds and the like can also be used as preferable crosslinking agents. The above-mentioned dihydroaromatic compound is a compound containing one or more aromatic rings, and is a compound in which at least one aromatic ring is dihydrogenated. The term "aromatic ring" as used herein means the definition of aromaticity (for example, translated by Toshio Goto "Basics of Organic Chemistry", (1976) Tokyo Kagaku Dojin, 10
Pages 5 to 106 [Richard S. Monson & John C. Shelton, "F
undamen-tals of Organic Chemistry "(1974) MacGraw-
Hill, Inc.] refers to a ring structure in which the number of π-electrons is 4n + 2 (n is an integer), and includes, for example, pyridine and quinoline. Thus, the dihydroaromatic compounds used in the present invention also include dihydro derivatives of quinoline. Further, the dihydroaromatic compound used in the present invention may have a substituent, and a substitution product with an alkyl group, various elements and a substitution derivative with a functional group are used. Such a dihydroaromatic compound can be arbitrarily synthesized by applying a known chemical reaction, but if the currently available ones are illustrated, 1,2-dihydrobenzene, cis-1,2-dihydrocatechol, 1,2-dihydronaphthalene, 9,10-dihydrophenanthrene and the like, 6-decyl-2,2,4
1,2-dihydro such as -trimethyl-1,2-dihydroquinoline, 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline, 2,2,4-trimethyl-1,2-dihydroquinoline Examples include quinoline compounds.
It may also be a polymer of these compounds.

The ether compound used as a cross-linking agent in the present invention may be a linear compound or a cyclic compound, and may further have a substituent. Specific examples are 1,3-dioxolane, cyclic ethers such as 1,4-dioxane, linear ethers such as ethyl ether and isopropyl ether, and 3,4-dihydro-2-pyran, 4H-chromene. Non-aromatic cyclic vinyl ether, furfuryl alcohol, furfuryl aldehyde, benzofuran, furan derivative represented by furfuryl acetate, n-octadecyl vinyl ether, linear vinyl ether compound represented by ethyl vinyl ether, ketene acetal, isoacetate These are enol ethers and enol esters of carbonyl compounds such as propenyl, vinyl acetate, ketone esters typified by 1-amino-1-methoxyethylene, lactones, aldehydes, amides, lactams and the like. These may have a substituent,
Substitutes with an alkyl group, various elements, and derivatives substituted with a functional group are used. Moreover, these may be individual or a mixture. Preferred is vinyl or alkenyl ether.

The tetrahydroaromatic compound used as the crosslinking agent of the present invention is a compound in which at least one aromatic ring is tetrahydrogenated. The aromatic ring as used herein refers to a ring structure according to the definition of aromaticity described above, and includes, for example, furan, benzene, naphthalene and the like, and excludes pyran and the like. Therefore, the tetrahydroaromatic compounds used in the present invention also include tetrahydro derivatives of naphthalene. Further, the tetrahydroaromatic compound used in the present invention may have a substituent, and a substitution product by an alkyl group and various elements and a substitution derivative by a functional group are used. Such a tetrahydroaromatic compound can be arbitrarily synthesized by applying a known chemical reaction,
Examples of those currently available include 1,2,3,4-tetrahydronaphthalene, tetrahydrobenzene and tetrahydrofuran. It may also be a polymer of these compounds.

The cyclopentane compound used as a cross-linking agent in the present invention is a compound containing at least one cyclopentane, cyclopentene or cyclopentadiene skeleton, that is, a 5-membered ring in which a ring is constructed only from carbon atoms. It is a compound. Specifically, it includes cyclopentane, cyclopentene, cyclopentadiene, dicyclopentadiene, indene, indane, fluorene and the like. These may of course have substituents, and substitution products with alkyl groups and various elements and substitution derivatives with functional groups are used.

In addition to the above, powdered sulfur, deoxidized sulfur, precipitated sulfur, colloidal sulfur, insoluble sulfur, highly dispersible sulfur, selenium, tellurium, morpholine disulfide, alkylphenol disulfide, thiuram polysulfide, which are usual rubber crosslinking agents, 2- (4-morpholinodithio) benzothiazole, dithiocarbamate, p-quinone dioxime, p, p'-dibenzoylquinone dioxime, tetrachloro-p-benzoquinone, poly-p-nitrosobenzene, N-methyl- N, 4-dinitrosoaniline, modified phenolic resin, polyamine and the like can also be used. These crosslinking agents may be used alone or in combination of two or more.

In the present invention, it is preferable to use a polyfunctional monomer in combination with the above crosslinking agent. Specific examples of polyfunctional monomers include trimethylolpropane trimethacrylate, higher esters of methacrylic acid typified by ethylene glycol dimethacrylate, divinylbenzene, triallyl isocyanurate, and polyfunctional vinyl monomers typified by diallyl phthalate. Class N, N'-
Examples thereof include bismaleimides represented by m-phenylene bismaleimide and N, N′-ethylene bismaleimide. It is preferable that these are at least bifunctional or higher in order to enhance the effect of the dynamic heat treatment described later. Among polyfunctional monomers, bismaleimides are particularly preferred because of their high reactivity. You may use these in combination of 2 or more types.

The total amount of these cross-linking agents and polyfunctional monomers used is 100 parts by weight per 100 parts by weight of the rubber-like substance.
01 to 7 parts by weight is desirable. This is because if it is less than 0.01 part by weight, the effect of crosslinking is low, and if it exceeds 7 parts by weight, a problem of coloration occurs or blending with a polyolefin resin becomes difficult.

The above-mentioned cross-linking agent may be used together with a cross-linking accelerator or a cross-linking promoting activator. The cross-linking accelerator and the cross-linking promoting activator are preferably used according to the type of cross-linking agent. Examples of the crosslinking accelerator include aldehyde-ammonia type, aldehyde-amine type, guanidine type, thiourea type, thiazole type and sulfenamide type. Examples of the cross-linking promoting activator include metal oxides, metal carbonates, metal hydroxides, unsaturated fatty acids, amines and the like.

As a method for crosslinking the rubber-like substance, the above-mentioned crosslinking agent may be contained in the rubber-like substance in advance, or the crosslinking agent may be added while performing the dynamic heat treatment. The temperature of the above-mentioned dynamic heat treatment is within a temperature range of the melting point or softening point of the rubber-like substance to the decomposition point or less, specifically, a temperature of 120 to 350 ° C., and a heat treatment time of 20 seconds to It is preferable that the time is 20 minutes. Further, it is desirable to use a mixer with a high shear rate in the melt kneading in the same treatment. Regarding the crosslinking of the rubber-like substance, it is not necessary that all the crosslinking agents have completed the reaction at the time of the dynamic heat treatment of the polyolefin-based resin and the rubber-like substance, and some crosslinking agents remain, After being formed into a tatami mat, it may be crosslinked by heat or the like. Therefore, by using two kinds of rubber-like substances and appropriately selecting the cross-linking agent, it is possible to cross-link only one rubber-like substance during the dynamic heat treatment and then cross-link the other after molding into a tatami mat.

The tatami mat of the present invention contains a resin component obtained by mixing (a) a polyolefin resin and (b) a crosslinked rubber. In this case, only the components (a) and (b) may be mixed, or may be dry-blended with an inorganic filler described below and then subjected to a molding machine or melt-kneading with an extruder or the like. Melt kneading is preferable to obtain a good resin sheet. The blending ratio of the polyolefin-based resin and the cross-linked rubber becomes weak against abrasion if the polyolefin-based resin is too much, and the touch becomes poor if too little,
The cross-linked rubber is preferably 10 to 70% by weight with respect to 30 to 90% by weight of the polyolefin resin.

To produce the tatami mat of the present invention, a resin component comprising a mixture of a polyolefin resin and a crosslinked rubber is added to
If necessary, an inorganic filler, a flame retardant or a softening agent can be added. The inorganic filler used in the present invention,
Conventionally known powdery particles, flat plates, scales, needles, balls or hollow fibers and fibers can be used. More specifically, calcium carbonate, magnesium carbonate, calcium sulfate, silica sand calcium, clay, diatomaceous earth, talc, alumina, glass powder, iron oxide, metal powder, graphite, silicon carbide, silicon nitride, silica, boron nitride, aluminum nitride. Powder filler such as carbon black, mica, glass plate, sericite, pyrophyllite, metal foil such as aluminum flake, flat plate-like or scale-like filler such as graphite,
Hollow filler such as shirasu balloon, metal balloon, pumice stone,
Glass fiber, carbon fiber, graphite fiber, whiskers, metal fiber, silicon carbide fiber, asbestos,
Mineral fibers such as wollastonite can be used.

When a flame retardant is used in the present invention, an inorganic type which does not use halogen is preferable. In particular,
Aluminum hydroxide, magnesium hydroxide, zirconium hydroxide, basic magnesium carbonate, dolomite, hydrotalcite, calcium hydroxide, barium hydroxide,
Hydrate of tin oxide, hydrate of inorganic metal compounds such as borax, zinc borate, zinc metaborate, barium metaborate, zinc carbonate, magnesium-calcium carbonate, calcium carbonate, barium carbonate, magnesium oxide, molybdenum oxide , Zirconium oxide, tin oxide, antimony oxide, red phosphorus and the like. These may be one kind or two
You may use together 1 or more types. Among these, at least one selected from the group consisting of magnesium hydroxide, aluminum hydroxide, basic magnesium carbonate, and hydrotalcite is particularly excellent in flame retardant effect and is economically advantageous.

The blending amount of these inorganic fillers and / or inorganic flame retardants is 25 with respect to 100 parts by weight of the resin component.
It is 0 parts by weight or less, preferably 5 to 150 parts by weight. If the blending amount is too large, it becomes weak against abrasion and loses flexibility, and cannot be used as a tatami mat. The above-mentioned inorganic filler and inorganic flame retardant may be used alone or in a mixture, and the type and blending amount may be determined according to the purpose. In order to further improve the dispersibility of these, a silane coupling agent,
You may use what was surface-treated with the organic titanate coupling agent, the metal salt of a fatty acid, etc.

In the present invention, a softening agent can be added to improve moldability and flexibility. As the mineral oil-based softening agent, the same ones as the so-called extender oils, which are used for the purpose of improving the processability during the processing of rubber, the effect of increasing the amount or the dispersibility of the filler, are used. These are high boiling point petroleum fractions and are classified into paraffinic, naphthenic and aromatic types. In the present invention, not only these petroleum fractions but also synthetic oils such as liquid polyisobutene can be used. The blending amount of the softening agent is preferably 50 parts by weight or less with respect to 100 parts by weight of the resin component. Further, a softening agent may be added to the crosslinked rubber (b) in advance, but the amount is 50 with respect to 100 parts by weight of the resin component of the tatami mat.
Must be within the weight range. If the blending amount exceeds 50 parts by weight, the tatami mat becomes too soft and bleeding occurs, which is inconvenient for use. Further, in order to obtain the improvement effect, it is preferable to use 0.1 part by weight or more.

The above-mentioned inorganic filler, flame retardant and softening agent may be added all at once or in appropriate divided portions during and / or after the heat treatment, but they may be melt-kneaded together with other components during the heat treatment. Is desirable. Moreover, you may mix | blend some or all of these at the time of manufacturing crosslinked rubber as needed. As the melt-kneading device for performing the above-mentioned dynamic heat treatment, a conventionally known device such as an open type mixing roll, a non-open type Banbury mixer, an extruder, a kneader, a twin screw extruder can be used.

The thickness of the tatami mat of the present invention is preferably 0.3 to 5 mm. If it is less than 0.3 mm, it is difficult to emboss,
When it exceeds 5 mm, it is not preferable as a tatami mat because it is too elastic. After molding into a tatami-mat, if the crosslinking agent remains in the resin component, it may be heated again to completely crosslink.

In the present invention, as the tatami floor for tatami mats,
Straw, cork, resin, wood, etc. can be used,
A polyolefin resin is preferable because it can be washed with water and is convenient for recycling. A laminate of a polyolefin-based foamed resin and a hollow synthetic resin plate is particularly preferable because it is lighter and tougher and has a good tatami mat feel. The tatami mat and the tatami mat may be joined together by using an adhesive, or after they are bonded, they may be sewn in the same manner as a normal tatami mat.

The resin component of the present invention or a mixture of the resin component and an inorganic filler or the like (hereinafter, both are referred to as a resin composition),
If necessary, stabilizers, antioxidants, ultraviolet absorbers, lubricants, foaming agents, antistatic agents, plasticizers, dyes, pigments, antibacterial agents, fragrances, etc. may be added appropriately, or the surface of the tatami mat may be coated with silicone resin or It can be coated with urethane resin or the like to further enhance abrasion resistance, or treated with plasma or ozone to impart hydrophilicity and further improve touch.

The resin composition of the present invention has a surface hardness of 80 or more Shore A indentation hardness, and 60 Shore D indentation hardness.
Must be: If the hardness is less than Shore A80, it is too soft and wear resistance increases, and Shore D60
If it exceeds, it feels too hard, so neither can be used as a tatami mat.

A second aspect of the present invention is to fix a base sheet to a resin sheet or a resin cloth made of the resin composition of the first aspect, thereby enabling sewing and improving the strength against tearing. The tatami mat of the present invention may be in any form such as a sheet obtained by embossing the resin composition obtained above, or a woven cloth or a non-woven cloth after processing the resin composition into a thread shape or a straw shape. However, in order to be able to sew and to be excellent in strength, it is desirable to finally fix it to the base cloth. In the present invention, fixing means fixing the resin composition and the base cloth so as not to peel off, and by applying heat to the resin composition, a method of impregnating the base cloth before the resin composition cures Alternatively, it may be bonded with an adhesive. When the base cloth is a thermoplastic resin, a method of melting a part of the base cloth and adhering it to the resin composition may be used as long as the characteristics of the cloth are exhibited. To fix the resin sheet and the base cloth to each other, after the resin composition is formed into a sheet by a usual method such as extrusion molding (for example, T-die method) or calendering method,
The sheet may be fixed to the base cloth before the resin composition is completely solidified, or may be fixed to the base cloth simultaneously with the extrusion molding. Similarly, the embossing may be performed after the molding or at the same time as the molding. When the cloth and the base cloth are fixed to each other, the cloth may be fixed after the cloth is manufactured, and if possible, the cloth and the base cloth may be fixed at the same time as the cloth is manufactured.

The base fabric used in the present invention refers to a fiber product in which one kind or two or more kinds of fibers are mixed to form a yarn, a knitted fabric, a woven fabric or a composite fabric. As the above-mentioned fibers, all known fibers can be used, but specifically, cellulose fibers such as cotton and hemp, protein fibers such as wool and silk, cellulosic regenerated fibers such as rayon, cupra and polynosic, acetate and triacetate. Semi-synthetic fiber, nylon, polyester, acrylic and acrylic fiber, vinylon, etc.
Polypropylene, polyvinyl chloride, polyethylene, vinylidene, polyurethane, benzoate, polyclar,
There are various synthetic fibers such as aromatic polyimide, glass fibers, metal fibers, and inorganic fibers such as carbon fibers. Among them, polyolefin-based woven cloth allows recovery of resin without generating toxic gas. Desirable for. The tatami mat of the present invention can be used as it is, without being combined with the tatami mat, or by processing the edges and the lower part thereof to be used as a flower garland.

[0029]

EXAMPLES The present invention will now be specifically described with reference to examples, but the present invention is not limited thereto. First, a method for testing and measuring physical properties in Examples and Comparative Examples will be described. <Test and measurement methods> Shore D durometer: According to _{H D D JIS K6760, JIS K7215} . Shore A durometer: According to the H _D A ISO 868.・ Boiling xylene insoluble matter (crosslinking degree) 20mm × 50mm × 0.2mm film is press molded,
Put it in a wire mesh of 120 mesh and put it in boiling xylene for 5 hours.
Soaked The weight before and after the immersion was measured, and the boiling xylene insoluble content was calculated from the following formula 1.

[Equation 1] Formability The formability of the sheet by T-die was evaluated according to the following criteria. ◯: Molding is possible without any problem, ×: There is a problem in molding. -Feeling Feeling was evaluated according to the following criteria by a method of pressing the sheet and a method of stroking the sheet produced by the T-die as it is or by adhering a polypropylene sheet having an expansion ratio of 30 times and a thickness of 1 mm. ◯: No stickiness, it is dry, ×: Sticky. -Abrasion resistance A traverse type abrasion tester was used, and broad cloth was used as the friction cloth. Load 0.1 Kgf / cm ² , stroke 10
The test was carried out under the conditions of 0 mm and a rubbing cloth speed of 30 reciprocations / minute and 2,000 reciprocations. The change in embossing was evaluated according to the following criteria. ◯: Almost no change, ×: Emboss was worn.

<Method for producing crosslinked rubber> The following component (A)
To (H) were mixed in the proportions shown in Table 1, mixed with a Henschel mixer, and the resulting mixture was mixed with a twin-screw continuous kneading extruder (30 mmφ, manufactured by Plastic Engineering Laboratory Co., Ltd.) Melt kneading was performed at 180 to 260 ° C. and a rotation speed of 200 rpm. Component (I) was added via a reciprocating metering pump connected to a ventro. When 80 parts by weight or more of the rubber-like substance was contained in 100 parts by weight of the crosslinked rubber, the mixture was melt-kneaded using a mixing roll and then manufactured in the same manner as above. Table 1 shows the measurement results of the boiling xylene insoluble matter of the obtained crosslinked rubber. <Method for producing resin composition> The crosslinked rubber obtained above is
A polyolefin resin and other components were mixed in the proportions shown in Table 2 and melt-kneaded in the same manner as above to produce a resin composition. A sheet having a thickness of about 2 mm was produced from the obtained resin composition with a press molding machine, and the physical properties were measured by the above-described test and measurement methods. The results are shown in Table 2. <Various components used> (A): Polyolefin resin (A ₁ ) polypropylene (melt flow rate 4.0 g / 1
0min; Product name: Nisseki Polypro J630G, manufactured by Nippon Petrochemical Co., Ltd. (A ₂ ) Ultra low density polyethylene (melt flow rate
5.0g / 10min; Product Name: Nisseki Soft Rex D955
0, manufactured by Nippon Petrochemical Co., Ltd.) (B): Rubber-like substance (B ₁ ) ethylene-propylene / random copolymer rubber (Moonie viscosity 24; trade name: JSR EP02P, manufactured by Japan Synthetic Rubber Co., Ltd.) ( B ₂ ) ethylene-propylene-diene / random copolymer rubber (Moonie viscosity 88; trade name: JSREP57
P, manufactured by Nippon Synthetic Rubber Co., Ltd. (C): 2,2,4-trimethyl 1,2-dihydroquinoline (trade name: Nocrac 224S, Ouchi Shinko Chemical Industry)
(D): 3,4-dihydro-2-pyran (Tokyo Kasei Co., Ltd.)
(E): 1,2,3,4-tetrahydronaphthalene (manufactured by Tokyo Kasei Co., Ltd.) (F): Indene (manufactured by Tokyo Kasei Co., Ltd.) (G): N, N'-m-phenylenebis Maleimide (Brand name: Barnock PM, manufactured by Ouchi Shinko Chemical Co., Ltd.) (H): Inorganic filler (silica antiblocking agent; Brand name: Dicalite) (I): Softener (Brand name: Super Oil C) , Nippon Oil
(Made by)

[0031]

[Table 1]

[0032]

[Table 2]

<Examples 1 to 8 and Comparative Examples 1 to 8> The resin composition obtained by the above method was molded into a thickness shown in Table 3 by using a T-die molding machine (screw diameter: 50 mm). Base fabric (Suft 9A202 while embossing the tatami pattern)
0) was laminated to prepare a tatami mat. Table 3 shows the evaluation results of the tatami mats only (gza), and tatami mats prepared using the tatami mats were also evaluated, and the results are shown in Table 3. In addition, as a reference example, commercially available polyvinyl chloride (thickness 1 mm; trade name: NK Plus Matt, NIPPON KAISEI PAPER CO., LTD.)
Manufactured). As can be seen from Table 3, in the examples, the feel and wear resistance comparable to those of vinyl chloride are maintained, but in the comparative examples, the feel and wear resistance are inferior.

[0034]

[Table 3]

[0035]

INDUSTRIAL APPLICABILITY The tatami mat of the present invention has good chemical properties such as water resistance, can be washed with water, and can withstand repeated use, and since it uses a crosslinked rubber component,
It has excellent wear resistance and heat resistance, and can be sewn by fixing the base fabric, so that it can be used for a long time in various environments without problems. It is also recyclable and does not generate toxic gases when incinerated for disposal. Even when a halogen-based compound is partially used, the amount thereof can be limited to an extremely small amount.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location C08L 23/26 LDA 7107-4J

Claims (2)

[Claims] 1. (a) Polyolefin resin 30 to 90
A tatami mat having a resin component consisting of 10% to 70% by weight of (b) crosslinked rubber and (b) a surface hardness of 80 indentations of Shore A to 60 indentations of Shore D. 2. The tatami mat according to claim 1, wherein the sheet or cloth is fixed to a base cloth.