JP2011127069A - Olefin-based transparent resin film for flooring material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film for a surface resin layer excellent in flame retardancy and transparency and provided with wear resistance and also flexibility suitable for a flooring material. <P>SOLUTION: The transparent resin film forming a surface resin layer of a flooring material is provided. The olefin-based transparent resin film for a flooring material excellent in flame retardancy and transparency is obtained by adding 0.1-2 pts.wt. of an alkoxyimino group type hindered amine-based compound as a flame retardant and 5-15 pts.wt. of a phosphorus-based antioxidant to 100 pts.wt. of an olefin-based resin. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a film for a surface resin layer used for the purpose of protecting a design layer on the surface of an olefin-based floor material used as a floor material for vehicles such as railways and buses, ships, and aircrafts.

  Conventionally, as floor materials for buildings such as buildings, condominiums, houses, commercial facilities, or floor materials for vehicles such as railroads and buses, vinyl chloride resin (hereinafter referred to as “simple”, “maintenance”, “economic”) Products made from PVC are widely used. However, while this PVC flooring is excellent in flame retardancy, it generates a toxic gas such as hydrogen chloride along with a large amount of fumes during combustion, which causes a problem in safety during fires. Compared with resin, PVC has a higher specific gravity, making it difficult to reduce the weight, and the wear resistance as a flooring material is inferior to that of an olefin-based flooring material. Therefore, in recent years, many olefin-based flooring materials have been used.

  In addition, olefin-based flooring used as a flooring for vehicles such as railways and buses has strict flame-retardant standards, and efforts are being made to make it flame-retardant. The addition of a large amount of flame retardant and supplemental organic flame retardant remains. (See Patent Document 1)

  When considering the combustion mechanism of flooring, it is considered most effective to flame-retardant the film for the surface resin layer, which is the outermost layer, but in the case of olefin-based resins, the flame retardant and transparency It is very difficult to develop a resin compound that does not impair maintenance and abrasion resistance, and a film for a surface resin layer having flexibility suitable for flooring has not been developed yet.

Patent Document 2 discloses an olefin film that is excellent in flexibility, transparency, heat resistance, flame retardancy, and has excellent wear resistance, contamination resistance, dimensional stability, and workability as an alternative to a soft vinyl chloride sheet. However, since it contains a halogen-based flame retardant, it is not suitable as a vehicle flooring. Patent Document 3 discloses a flame retardant film containing an alkoxyimino group-type hindered amine compound in an olefin resin, which has excellent flame resistance, low temperature impact resistance, whitening resistance, and transparency. Although a film has been reported, it was not satisfactory as a film for a surface resin layer to be used on the surface of an olefin flooring.
JP 2004-250815 A JP-A-7-330986 JP 2006-249306 A

  The present invention has been made in view of such a technical background, and is an excellent surface of an olefin-based flooring that is excellent in flame retardancy and transparency, has abrasion resistance, and has flexibility suitable for a flooring. It aims at providing the film for resin layers.

  In order to achieve the above object, the present invention provides the following means.

[1] In a transparent resin film forming a surface resin layer of a flooring material, 0.1 to 3 parts by weight of a hindered amine compound and 5 to 15 parts by weight of a phosphorus flame retardant are added to 100 parts by weight of an olefin resin. A transparent resin film for olefin-based flooring, which is excellent in flame retardancy and transparency.

[2] In the transparent resin film for an olefin-based flooring material, part or all of the hindered amine compound is 0.5 to 3 parts by weight of an alkoxyimino group hindered amine compound, and is excellent in flame retardancy and transparency. 2. The transparent resin film for olefin-based flooring according to item 1 above.

[3] In the transparent resin film for an olefin-based flooring material, 1 to 5 parts by weight of organically treated clay is further added as a flame retardant with respect to 100 parts by weight of the olefin-based resin, which is excellent in flame retardancy and transparency. 3. The transparent resin film for olefin-based flooring according to 1 or 2 above, wherein

[4] In the transparent resin film for olefin-based flooring, 0.01 to 2 parts by weight of a phosphorus processing heat stabilizer and / or a hydroxylamine processing heat stabilizer is further added to 100 parts by weight of the olefin resin. The transparent resin film for an olefin-based flooring according to any one of the preceding claims 1 to 3, which is excellent in flame retardancy and transparency.

[5] Any one of items 1 to 4 above, wherein the olefin resin is composed of 50 to 90 parts by weight of polypropylene and 50 to 10 parts by weight of a hydrogenated styrene elastomer having a vinyl content of 60% or more. The transparent resin film for olefin-based flooring as described in the item.

[6] The transparent resin film for olefin flooring has a thickness of 100 to 1000 μm, an oxygen index (LOI value) of 21 or more, a transmittance of 70% or more, a longitudinal elastic modulus of 10 to 800 MPa, and wear resistance. The transparent resin film for an olefin-based flooring according to any one of the preceding items 1 to 5, wherein is 200 mg or less.

  The invention of [1] is a transparent resin film for an olefin-based flooring, comprising 0.1 to 3 parts by weight of a hindered amine compound and 5 to 15 parts by weight of a phosphorus flame retardant with respect to 100 parts by weight of the olefin resin. Can be added to suppress the emission of harmful substances during combustion, and the amount of flame retardant added can be reduced compared to the conventional one. It can be set as the resin film for flooring.

  In the invention of [2], it is a transparent resin film for olefin flooring, and 0.5 to 3 parts by weight of an alkoxyimino group-type hindered amine compound and phosphorus-based flame retardant 5 with respect to 100 parts by weight of the olefin resin. Addition of -15 parts by weight further suppresses the emission of harmful substances during combustion, reduces the amount of flame retardant added, and suppresses the effects of flame retardant addition as much as possible It can be set as the transparent resin film for olefin type flooring materials.

  In the invention of [3], by adding 1 to 5 parts by weight of organically treated clay as a flame retardant to 100 parts by weight of the olefin resin, the carbonization phenomenon at the time of combustion of the resin composition is promoted and further improved. A transparent resin film for olefin-based flooring having high flame retardancy can be obtained.

  In the invention of [4], 0.01 to 2 parts by weight of a phosphorus processing heat stabilizer and / or a hydroxylamine processing heat stabilizer is further added to 100 parts by weight of the olefin resin, so that it is included in the resin. Transparent olefin flooring that significantly reduces the discoloration phenomenon of the resin composition caused by the quinone coloring compound that occurs when the phenolic antioxidant and the nitrogenous component contained in the flame retardant react during processing It can be set as a resin film.

  [5] If the transparent resin film for olefinic flooring of the invention of [6] is used for the surface resin layer of the olefinic flooring, it has excellent flexibility, good workability, wear resistance and resistance to heeling. It can be set as the olefin type flooring excellent in residual dent property. Furthermore, since it is excellent in flame retardancy and is transparent, a printed layer or the like can be inserted to obtain an olefin-based flooring material that is rich in design.

  An embodiment of an olefin-based flooring according to the present invention will be described with reference to the drawings. The normal olefin-based flooring (1) has a printing layer (4) laminated on the lower surface side of the surface resin layer (2 (A)) and an adhesive layer (5) on the lower surface side of the printing layer (4). The base material layer (3) containing an olefin resin is laminated and integrated, and is used as a flooring. (See FIG. 1) Further, the base material layer (3) may be composed of three layers, and a cloth made of glass fiber may be inserted in the middle to impart dimensional stability of the flooring. (See FIG. 3) FIG. 1 shows an example in which the surface resin layer (2) is composed of a single transparent resin film for olefin-based flooring of the present invention. The surface resin layer (2) is an olefin of the present invention. A laminated structure in which a plurality of layers of a transparent resin film for a flooring material is laminated may be used. For example, as shown in FIG. 2, the surface resin layer (2) has a three-layer structure of a surface layer (10), an intermediate layer (11), and a lower layer (12), and the surface layer (10) and the lower layer (12) are formed according to the present invention. A surface resin layer (2) having a structure in which HSBR (hydrogenated styrene-butadiene-rubber) is used for the intermediate layer (10) as the transparent resin film for olefin-based flooring (A) can also be mentioned. In this case, the surface resin layer is rich in flexibility. (See Figure 2)

  In the present invention, the surface resin layer (2) contains an olefin resin. Since the surface resin layer (2) contains an olefin resin, the flooring (1) has excellent wear resistance and contamination resistance on the surface. Examples of the olefin resin include polypropylene, polyethylene, ethylene-vinyl acetate copolymer resin, ethylene-α olefin copolymer resin, olefin thermoplastic elastomer, and the like. Among them, polypropylene has mechanical properties and transparency. The balance is excellent, and the elastomer and polymer alloy having a higher vinyl content can improve the flexibility and the elastic recovery force while improving the transparency. For example, it preferably comprises 50 to 90 parts by weight of polypropylene and 50 to 10 parts by weight of a hydrogenated styrene elastomer having a vinyl content of 60% or more. In particular, strict flame retardant standards are required for olefin-based flooring materials for vehicles such as railways and buses and ships, and the surface resin layer (2) that forms the surface layer of course has flame retardant performance. In addition, since standards such as wear resistance, residual dent resistance due to heel, etc., and workability (flexibility) are provided, it is preferable to have a configuration that is rich in flexibility and excellent in elastic resilience.

  The thickness of the surface resin layer (2) is not particularly limited, but is preferably set to 100 to 1000 μm. When the thickness is 100 μm or more, sufficient wear resistance is obtained, and when the thickness is 1000 μm or less, the generation of valley warp of the flooring (1) can be effectively prevented.

In the transparent resin film for olefinic flooring of the present invention, 0.1 to 3 parts by weight of a hindered amine compound and 5 to 15 parts by weight of a phosphorus flame retardant are added to 100 parts by weight of the olefinic resin. Flame retardancy is provided synergistically to ensure transparency. Examples of hindered amine compounds include bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (2,2,6,6-tetramethyl-4-piperidyl) succinate, bis (1,2, 2,6,6-pentamethyl-4-piperidyl) sebacate, bis (N-octoxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (N-benzyloxy-2,2,6, 6-tetramethyl-4-piperidyl) sebacate, bis (N-cyclohexyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4 -Piperidyl) 2- (3,5-di-t-butyl-4-hydroxybenzyl) -2-butylmalonate, bis (1-acryloyl-2,2,6,6-tetra Til-4-piperidyl) 2,2-bis (3,5-di-t-butyl-4-hydroxybenzyl) -2-butylmalonate, bis (1,2,2,6,6-pentamethyl-4- Piperidyl) decanedioate, 2,2,6,6-tetramethyl-4-piperidyl methacrylate, 4- [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxy] -1- [ 2- (3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxy) ethyl] -2,2,6,6-tetramethylpiperidine, 2-methyl-2- (2,2, 6,6-tetramethyl-4-piperidyl) amino-N- (2,2,6,6-tetramethyl-4-piperidyl) propionamide, tetrakis (2,2,6,6-tetramethyl-4-piperidyl ) 1, , Mention may be made of 3,4-butane tetracarboxylate, tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) 1,2,3,4-butane tetracarboxylic carboxylate. Further, it may be a polymer type compound. As specific examples, N, N ′, N ″, N ″ ′-tetrakis- [4,6-bis- [butyl- (N-methyl-2,2,6, 6-
Tetramethylpiperidin-4-yl) amino] -triazin-2-yl] -4,7-diazadecane-1,10-diamine, dibutylamine and 1,3,5-triazine-N, N'-bis (2 , 2,6,6-Tetramethyl-4-piperidyl) -1,6-hexamethylenediamine and polycondensate of N- (2,2,6,6-tetramethyl-4-piperidyl) butylamine, dibutylamine , 1,3,5-triazine and N, N'-bis (2,2,6,6-tetramethyl-4-piperidyl) butylamine, poly [{(1,1,3,3 -Tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl} {(2,2,6,6-tetramethyl-4-piperidyl) imino} hexamethylene {(2,2,6, 6-tetramethyl-4-piperidi ) Imino}], 1,6-hexanediamine-N, N′-bis (2,2,6,6-tetramethyl-4-piperidyl) and morpholine-2,4,6-trichloro-1,3,5 A polycondensate with triazine, poly [(6-morpholino-s-triazine-2,4-diyl) [(2,2,6,6-tetramethyl-4-piperidyl) imino] -hexamethylene [(2 , 2,6,6-tetramethyl-4-piperidyl) imino]], etc., high molecular weight HALS in which a plurality of piperidine rings are bonded via a triazine skeleton; dimethyl succinate and 4-hydroxy-2,2,6,6 -Polymer with tetramethyl-1-piperidineethanol, 1,2,3,4-butanetetracarboxylic acid, 1,2,2,6,6-pentamethyl-4-piperidinol and 3,9-bis (2- Hydroxy-1 , 1-dimethylethyl) -2,4,8,10-tetraoxaspiro [5,5] undecane and the like, and the like are compounds in which piperidine rings are bonded via an ester bond.

  In the more preferred transparent resin film for olefinic flooring according to the present invention, 0.5 to 3 parts by weight of an alkoxyimino group-type hindered amine compound and 5 to 15 parts by weight of a phosphorus flame retardant with respect to 100 parts by weight of the olefinic resin. The flame retardance is synergistically imparted and transparency is ensured by adding. If the addition amount of the alkoxyimino group-type hindered amine compound is less than 0.5, the flame retardant effect cannot be obtained, and a large amount of other flame retardants must be added, and transparency cannot be ensured. End up. On the other hand, when the addition amount of the alkoxyimino group-type hindered amine compound exceeds 3 parts by weight, the increase in the addition amount is not preferable because it results in a parallel state that does not lead to an improvement in the flame retardant effect. The addition amount of the alkoxyimino group type hindered amine compound is more preferably 0.5 to 2 parts by weight.

  As the alkoxyimino group type hindered amine compound, a hindered amine derivative in which the imino group of the high molecular weight hindered amine radical scavenger is replaced with an N-alkoxyimino group is preferable. Japan Co., Ltd.).

  The olefin resin burns by a radical chain reaction called auto-oxidation during combustion, and radicals are generated and burned in the process. In the present invention, the radical scavenger of the hindered amine derivative captures and stabilizes radicals generated during combustion of the olefin resin, thereby suppressing the generation of combustible substances and obtaining a flame retardant effect. Also, by using an alkoxyimino group-type hindered amine compound, it becomes possible to significantly reduce the amount of flame retardant added compared to the conventional amount added, and to suppress the impact on the olefin resin due to the addition of flame retardant etc. Can do.

  Phosphorus flame retardants include melamine pyrophosphate, melamine orthophosphate, diammonium phosphate, monoammonium phosphate, amide phosphate, melamine polyphosphate, ammonium polyphosphate, polyphosphate amide, aromatic phosphate ester, aromatic condensation Examples thereof include phosphoric acid esters. Among them, ammonium polyphosphate is preferable because it has a high flame-retardant effect and hardly inhibits transparency. The phosphorus-based antioxidant prevents coloring or strength reduction due to oxidation of the olefin-based resin. The addition amount of the phosphorus antioxidant is preferably 5 to 15 parts by weight. When the amount is less than 5 parts by weight, the antioxidant effect cannot be obtained, and when the amount is more than 15 parts by weight, the transparency of the resin composition is impaired. A more preferable amount of the phosphorus-based flame retardant added is 5 to 12 parts by weight.

  In the present invention, by adding 1 to 5 parts by weight of an organically treated clay as a flame retardant to the alkoxyimino group-type hindered amine compound and the phosphorus flame retardant, the transparent for olefin flooring having further excellent flame retardancy A resin film can be obtained. Organically treated clay is a clay in which the clay layer is expanded using an organic onium salt, etc. When an organic onium ion structure is present between the clay layers, the intermolecular force of the resin or the like is small between the negatively charged clay layers. A substance can be inserted, and the dispersibility of the clay in the resin can be improved. The organic onium salt is not particularly limited, but an alkyl onium salt is preferably used. Among them, it is more preferable to use a quaternary ammonium salt having at least one alkyl group having 1 to 32 carbon atoms, and it is particularly preferable to use a quaternary ammonium salt having at least one alkyl group having 1 to 18 carbon atoms. In the clay which is not organically treated, dispersion in the olefin resin is non-uniform and it is difficult to ensure the transparency of the resin. When the addition amount of the organically treated clay is less than 1 part by weight, the flame retardant effect is not improved, which is not preferable. Moreover, when it exceeds 5 weight part, transparency of a resin composition will be impaired and it is unpreferable. A more preferable amount of the organically treated clay added is 1 to 3 parts by weight.

  The clay is not particularly limited, and examples thereof include montmorillonite, mica, saponite, hectorite, beidellite, nontronite, kaolinite, vermiculite, halloysite, and pyrophyllite. Among these, it is preferable to use montmorillonite and mica.

  Further, in the present invention, it is preferable that 0.01 to 2 parts by weight of a phosphorus processing heat stabilizer and / or a hydroxylamine processing heat stabilizer is added to 100 parts by weight of the olefin resin. The processing heat stabilizer is for suppressing deterioration and discoloration of the resin caused by thermal energy during the heat processing of the synthetic resin. As the phosphorus processing heat stabilizer, tris (2,4-di-t-butyl is used. Phenyl) phosphite, 3,9-bis (2,4-di-tert-butylphenoxy) -2,4,8,10-tetraoxa-3,9-diphosphaspiro [5.5] undecane, Among them, tris (2,4-di-t-butylphenyl) phosphite is preferable because it is highly effective and stable as a secondary antioxidant. For example, a commercially available product “IRGAFOS 168” (manufactured by Ciba Japan Co., Ltd.) can be mentioned.

  Moreover, as a hydroxylamine type | system | group processing heat stabilizer, the commercial item "IRGASTAB FS 042" (made by Ciba Japan Ltd.) can be mention | raise | lifted, for example.

  By adding 0.01 to 2 parts by weight of these processing heat stabilizers, the quinone generated by the reaction of the phenolic antioxidant contained in the resin and the nitrogenous component contained in the flame retardant during processing. It is possible to obtain a transparent resin film for an olefin-based flooring material in which the discoloration phenomenon of the resin composition due to the chromogenic compound is greatly reduced. If the amount of the processing heat stabilizer is less than 0.01 parts by weight, the effect of suppressing discoloration is reduced, which is not preferable. On the other hand, if the addition amount exceeds 2 parts by weight, an increase in the addition amount is not preferable because it is in a parallel state that does not prevent discoloration. A more preferable amount of the processing heat stabilizer added is 0.05 to 2 parts by weight.

  In the present invention, the olefin resin is preferably composed of 50 to 90 parts by weight of polypropylene and 50 to 10 parts by weight of a hydrogenated styrene elastomer having a vinyl content of 60% or more. By setting it as these resin structures, it can be set as a flexible and transparent resin film as a transparent resin film for olefin type flooring materials.

  Furthermore, the transparent resin film for olefinic flooring of the present invention has a thickness of 100 to 1000 μm, an oxygen index (LOI value) of 21 or more, a transmittance of 70% or more, a longitudinal elastic modulus of 50 to 500 MPa, and wear resistance. The property is preferably 200 mg or less.

  When the thickness of the transparent resin film for olefin-based flooring is less than 100 μm, it is difficult to maintain the strength and durability as the surface resin layer, and when the thickness is more than 1000 μm, economic problems and flooring There is also a possibility of reverse warping due to the balance with the base material layer.

  The oxygen index (LOI value) is a numerical value of the oxygen concentration at the lowest oxygen concentration that can maintain combustion. If the oxygen index (LOI value) is 21 or more for the surface resin layer of the flooring material, the normal state It is preferable because it self-digests without spreading the combustion. In the present invention, the oxygen index (LOI value) was measured with an oxygen index flammability tester (manufactured by Suga Test Instruments Co., Ltd.).

  The transmittance refers to the light transmittance of the resin film, and is expressed as a ratio when the intensity of light passing through the sample is divided by the intensity of light when there is nothing. When measured with an ultraviolet-visible spectrophotometer (manufactured by Shimadzu Corporation), if less than 70%, the film had an opaque feeling and was rejected.

  Longitudinal elastic modulus is a numerical value indicating the ratio of stress and strain at the start of deformation of the resin composition, and a numerical value lower than 10 MPa is preferably a surface film that is easily scratched due to insufficient strength when used as a flooring material. Even if it exceeds 800 MPa, it is too hard and the workability deteriorates, which is not preferable as a flooring material. More preferably, 50-500 MPa is good. The longitudinal elastic modulus was measured according to JISK7127.

  Abrasion resistance indicates the abrasion resistance of the surface of the transparent resin film. In accordance with the friction test method for building materials and building components in accordance with JIS A1453, a wear ring wound with a predetermined abrasive paper is used, and the taper wear tester is used. The amount of wear loss (g) was measured. When the wear resistance exceeds 200 mg, the floor material is worn out and the service life is shortened.

  Although the thickness of the olefin type flooring which uses the transparent resin film for olefin type flooring of this invention as a surface resin layer is not specifically limited, Usually, 2-5 mm is common. Moreover, it may cut | judge and use as a tile-like flooring, and may be comprised as a sheet-like flooring (for example, elongate sheet | seat etc. of width about 600-2500 mm), It does not specifically limit.

    Moreover, it is preferable that the residual dent rate of the olefin type flooring which uses the transparent resin film for olefin type flooring of this invention as a surface resin layer is 8.0% or less. If the residual dent rate exceeds 8.0%, the heel mark can be visually confirmed, which is not preferable. Furthermore, the residual dent rate of a preferable flooring is 6% or less.

  For example, in the case of FIG. 1, the olefin-based flooring according to the above configuration is manufactured as follows. First, the transparent resin film for olefinic flooring of the present invention is used as a surface resin layer, and a printing ink containing a synthetic resin is printed on the lower surface of the surface resin layer (2) to form the printed layer (4). As the printing ink, for example, an ink in which a pigment is added and mixed in a urethane resin is used. Further, an adhesive (5) is applied and a base material layer (3) is laminated. Moreover, you may laminate | stack the base material layer (3) which inserted the cloth which consists of glass fiber in an olefin resin like FIG.

  Moreover, in the example shown in FIG. 3, as a base material layer, a concealment layer (8) is laminated | stacked on the uppermost surface, and it superimposes on a printing layer (4), and the pattern of printing is clarified, and a fiber layer (9) is put on the lowermost surface. The base material layer which laminates | stacks and improves the adhesiveness with a floor is illustrated.

  In addition, the flooring (1) according to the present invention is not particularly limited to that manufactured by the above-described exemplary manufacturing method.

More specifically, a method for producing a transparent resin film for olefin flooring according to the present invention will be described.
<Example 1>
As shown in Table 1, 10 parts by weight of an amorphous propylene-ethylene copolymer (amorphous poly α-olefin resin) having a number average molecular weight of 6000 and a styrene-ethylene-butadiene-styrene copolymer having a number average molecular weight of 16000 Polymer resin (SEBS) 55 parts by weight, polypropylene 35 parts by weight, calcium carbonate 200 parts by weight, antioxidant (hindered phenol-based antioxidant) 0.4 part by weight, lubricant (phosphate ester-based) A composition consisting of 2 parts by weight was kneaded with a Banbury mixer, and a substrate layer (3) having a thickness of 1.8 mm was prepared using a calendar molding machine. In addition, about the base material layer, the thing similar to Example 1 was used in common in each example.

On the other hand, as the surface resin layer (2), 100 parts by weight of olefin resin comprising 70 parts by weight of polypropylene, 26 parts by weight of hydrogenated styrene elastomer having a vinyl content of 70%, and 4 parts by weight of maleic acid-modified styrene elastomer Then, 1.5 parts by weight of an alkoxyimino group-type hindered amine compound (“FLAMESTAB NOR 116 FF” manufactured by Ciba Japan Co., Ltd.) and 10 parts by weight of ammonium polyphosphate were added, and an extruder (manufactured by Toyo Seiki Co., Ltd.). ), Melted at a temperature of 260 ° C., led to a slit-shaped base, and formed into a sheet shape to obtain a transparent resin film for olefin-based flooring having a thickness of 600 μm. Next, a predetermined pattern is printed on the back surface of the transparent resin film for olefin-based flooring (2) by gravure printing to form a printed layer (4), and an adhesive (maleic acid-modified propylene is further formed on the lower surface thereof. -1-butene copolymer resin / maleic acid-modified propylene-ethylene-1-butene copolymer resin = 90/10) was applied at 3 g / m ² to form an adhesive layer (5).

  Next, the base material layer (3) was laminated and adhered to the surface resin layer (2) on which the adhesive layer (5) was formed, to obtain a flooring material having a thickness of 2.4 mm. The flooring thus obtained was a flexible flooring with excellent combustion performance and vivid colors. Further, the residual dent rate was 4.0%. Furthermore, various performance tests were conducted, and the evaluation results are shown in Table 3.

<Examples 2 to 9>
Except that the conditions such as the composition of the surface resin layer (2) are as shown in Table 1-1 to Table 1-3, a flooring is obtained in the same manner as in Example 1 and various performance tests are performed. Is shown in Table 3.

<Comparative Example 1>
A flooring was obtained in the same manner as in Example 1 except that only 10 parts by weight of ammonium polyphosphate was added as a surface resin layer (2) in Example 1 to 100 parts by weight of olefin resin. Various performance tests were conducted and the results are shown in Table 3.

<Comparative Examples 2-3>
Except that the conditions such as the composition of the surface resin layer (2) were set as shown in Table 2, a flooring was obtained in the same manner as in Example 1, various performance tests were performed, and the evaluation results are shown in Table 3.

<Reference example>
Flooring material in the same manner as in Example 1 except that the composition of the olefin resin in the composition of the surface resin layer (2) is 70 parts by weight of polypropylene and 26 parts by weight of hydrogenated styrene elastomer having a vinyl content of 50%. Various performance tests were conducted, and the evaluation results are shown in Table 3.

  As can be seen from Tables 1 to 3, the flooring materials of Examples 1 to 9 in the specified range of the composition of the surface resin layer are wear resistance, stain resistance, workability, flame retardancy, transmittance, and longitudinal elastic modulus. Both of these were within the specified range and had excellent performance. On the other hand, none of the comparative examples exceeding the regulation value range could be satisfied as a transparent resin film for olefin-based flooring. In addition, the method of the various performance tests with respect to each flooring obtained as mentioned above evaluated as follows.

<Method for measuring longitudinal elastic modulus>
The measurement was performed according to JIS K7127. The longitudinal elastic modulus was 10 to 800 MPa “◎”, and those outside the range were “x”.

<Method for measuring residual dent rate>
It measured according to JIS A1454. Those having a residual dent ratio of 4% or less were evaluated as “◎”, those having 4-8% as “◯”, and those exceeding 8% as “X”.

<Abrasion resistance test>
In accordance with the friction test method for building materials and building components according to JIS A1453, use a wear ring with a predetermined abrasive paper wrapped around the surface of each flooring material, rotate it 1000 times with a taper wear tester, and reduce wear ( g) was measured. Those with a weight loss of 180 mg or less were rated as “◎”, those with 180 to 200 mg as “◯”, and those exceeding 200 mg as “x”.

<Contamination resistance test>
In accordance with the contamination test of vinyl flooring according to JIS A5705, 2 mL of the contamination material was dropped on the surface of each flooring, left to stand for 24 hours, washed with water containing a neutral detergent, and further washed with alcohol. Then, after wiping with gauze and leaving it for 1 hour, the change of the color of the dripping part, the glossiness, and the swelling was observed visually. Those that did not change by observation were marked “◎”, and those that changed at least one were marked “x”.

<Workability test>
Excellent flexibility and construction workability and especially good compatibility with the groundwork (construction floor) is marked with “◎”, and it has good flexibility, construction workability, and familiarity with the groundwork. “X” means that the flexibility is insufficient, the workability is poor, and the familiarity with the groundwork is “X”.

  As described above, the oxygen index was “◯” if it exceeded 2 l, and “◎” for 24 or more, and “x” for less than 2 l. As described above, the transmittance criterion was “◯” when it exceeded 70%, “◎” when 80% or more, and “X” when less than 70%.

  Not only for vehicles, but also for buildings such as buildings, condominiums, houses, commercial facilities, etc., they can be used sufficiently for flooring materials that require flame retardancy and that require transparency of the surface resin layer. .

It is explanatory drawing which shows the flooring which concerns on one Embodiment of this invention. It is explanatory drawing which shows the flooring which concerns on another embodiment of this invention. (Surface resin layer portion in Fig. 1) It is explanatory drawing which shows the flooring which concerns on another embodiment of this invention. (Substrate layer portion of FIG. 1)

DESCRIPTION OF SYMBOLS 1 Olefin type flooring material 2 Surface resin layer 3 Base material layer 4 Printing layer 5 Adhesive layer 6 Glass fiber layer 7 Olefin type resin layer 8 Concealment layer 9 Fiber layer 10 Surface layer 11 Intermediate layer 12 Lower layer A Transparent resin for olefin type flooring the film

Claims (6)

  In the transparent resin film that forms the surface resin layer of the flooring material, 0.1 to 3 parts by weight of a hindered amine compound and 5 to 15 parts by weight of a phosphorus flame retardant are added to 100 parts by weight of the olefin resin. A transparent resin film for olefin-based flooring characterized by excellent flame retardancy and transparency.   In the transparent resin film for an olefin-based flooring material, part or all of the hindered amine compound is an alkoxyimino group hindered amine compound of 0.5 to 3 parts by weight, and is excellent in flame retardancy and transparency. The transparent resin film for olefin-based flooring according to claim 1.   In the transparent resin film for olefin-based flooring, 1 to 5 parts by weight of organically treated clay is further added as a flame retardant with respect to 100 parts by weight of the olefin-based resin, which is excellent in flame retardancy and transparency. The transparent resin film for olefin-based flooring according to claim 1 or 2.   In the transparent resin film for olefin-based flooring, 0.01 to 2 parts by weight of a phosphorus processing heat stabilizer and / or a hydroxylamine processing heat stabilizer is further added to 100 parts by weight of the olefin resin. The transparent resin film for an olefin-based flooring according to any one of claims 1 to 3, wherein the transparent resin film is excellent in flammability and transparency.   5. The olefin resin is composed of 50 to 90 parts by weight of polypropylene and 50 to 10 parts by weight of a hydrogenated styrene elastomer having a vinyl content of 60% or more. The transparent resin film for olefin-based flooring described.   The transparent resin film for olefin flooring has a thickness of 100 to 1000 μm, an oxygen index (LOI value) of 21 or more, a transmittance of 70% or more, a longitudinal elastic modulus of 10 to 800 MPa, and an abrasion resistance of 200 mg or less. The transparent resin film for an olefin-based flooring according to any one of claims 1 to 5, wherein

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