JPH10235805A - Non-halogen cushioning floor material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a non-halogen cushioning floor material provided with various performances equivalent to or higher than those of cushioning floor materials composed of vinyl chloride resin. SOLUTION: A cushioning floor material is provided at least with a fibrous base 11, an intermediate layer 12 formed by applying an emulsion of synthetic resin not containing halogen or the like on the fibrous base and drying and solidifying the same thereon, a printing pattern 13 applied on the intermediate layer 12, a transparent top layer 14 formed by applying an emulsion of synthetic resin not containing halogen on the intermediate layer 12 with the printing pattern 13 and drying and solidifying the same and a cushion layer 15 not containing halogen formed on the back of the fibrous base. Various physical properties required for the floor material are equivalent to or higher than those of a cushioning floor material composed of vinyl chloride resin heretofore available by the arrangement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a halogen-free cushioning flooring material.

[0002]

2. Description of the Related Art Conventionally, cushioning flooring materials include:
Those using a vinyl chloride resin such as polyvinyl chloride are used. On the other hand, in recent years, it has been studied to use a cushioning flooring made of a synthetic resin or rubber containing no halogen instead of the cushioning flooring made of the vinyl chloride resin.

[0003]

As the above-mentioned halogen-free synthetic resins, olefin resins and acrylic resins have been receiving attention. However, olefin resins and acrylic resins have various problems such as workability and difficulty in obtaining various materials required for flooring. It was difficult to obtain a cushioning flooring material having performances equal to or higher than that of the flooring material. An object of the present invention is to solve the above-mentioned problems and to provide a non-halogen cushioning flooring material having various performances equal to or higher than that of a cushioning flooring material made of a vinyl chloride resin.

[0004]

Means for Solving the Problems The non-halogen cushioning flooring material of the present invention which has been made to solve the above-mentioned problems, comprises at least a fibrous base material and an emulsion of a synthetic resin containing no halogen on the fibrous base material. Alternatively, apply an emulsion or rubber latex of a synthetic resin containing no halogen to the intermediate layer formed by applying and drying and solidifying rubber latex, the printed pattern applied to the intermediate layer, and the printed intermediate layer. A transparent top layer formed by drying and solidifying,
And a cushion layer containing no halogen formed on the back surface of the fibrous base material.

As the fibrous base material, natural animal or vegetable fibers conventionally used as flooring base materials; asbestos; glass fiber; rock wool; pulp;
Polyethylene, polypropylene, polyamide, acrylic, synthetic fibers such as polyester; one or more of inorganic fibers or organic fibers selected from the like, if necessary,
Inorganic fillers, woven fabrics, knitted fabrics, nonwoven fabrics, papers, or laminates thereof obtained by adding a synthetic resin-based binder or the like can be used. In particular, organic fiber nonwoven fabrics having excellent dimensional stability can be used.
Glass / pulp mixed non-woven fabric such as glass-pulp mixed non-woven fabric,
Glass paper or a laminate of these, which does not easily cause swelling, shrinkage, and reduction in mechanical strength with respect to water, is preferable.

Specific examples of the synthetic resin contained in the synthetic resin emulsion for forming the undercoat layer include homopolymers or copolymers of acrylic esters, methacrylic esters, acrylic acid, methacrylic acid, acrylamide, acrylonitrile and the like. And the like. An acrylic resin such as an acrylic resin; an acrylic-styrene copolymer resin; an ethylene-vinyl acetate copolymer resin; a water-soluble polyester resin; The synthetic resin contained in the synthetic resin emulsion may be a mixture of two or more synthetic resins.

[0007] As the synthetic resin contained in the synthetic resin emulsion for forming the undercoat layer, it is desirable to select a synthetic resin having a glass transition point (Tg point) of -30 ° C to 30 ° C. Of course, as long as the properties described below are not impaired, a glass transition point of 30 ° C. or less and a glass transition point of more than 30 ° C. may be mixed. In addition, this glass transition point is a temperature at which a segment of a molecule constituting a polymer substance does not lose its relative position as a whole but starts to rotate or vibrate at a secondary transition point. At very low temperatures, the polymeric substance is frozen and becomes glassy. Further, the intermediate layer may be formed of rubber latex such as SBR latex, MBR latex, NBR latex, IIR latex, or a mixture thereof.

It is desirable to add 50 to 300 parts by weight of an inorganic filler to 100 parts by weight of the solid content of the synthetic resin or rubber to the synthetic resin emulsion or rubber latex forming the above-mentioned undercoat layer. By adding the inorganic filler in this way, the tackiness of the undercoat layer is suppressed, and the printability of the printed pattern described later is improved, and the solid content concentration of the synthetic resin emulsion or rubber latex is increased. There is also an advantage that the drying property at the time is improved.

Examples of the inorganic filler include commonly used inorganic fillers such as aluminum hydroxide, magnesium hydroxide, calcium carbonate, magnesium carbonate, silica, alumina, calcium aluminate, silicic acid, talc, clay and the like. Hollow balloons such as glass balloons, shirasu balloons, and synthetic resin balloons can be used. By using a hollow balloon such as a glass balloon as the inorganic filler, the cost can be reduced and the weight of the obtained floor material can be reduced. As the above-mentioned inorganic filler, it is desirable to use those having an average particle size of 0.5 to 10 μm, particularly preferably about 1 to 5 μm.

When the intermediate layer of the flooring material of the present invention is formed of a synthetic resin emulsion, 50 to 300 parts by weight of an inorganic filler is added per 100 parts by weight of the solid content of the synthetic resin.
By selecting and using an emulsion of a synthetic resin having a glass transition point of −30 ° C. to 30 ° C., when forming a printed pattern while satisfying the cold resistance required for flooring and suppressing the stickiness of the surface. Printability can be improved.
According to the findings of the present inventors, when an emulsion of a synthetic resin having a glass transition point exceeding 30 ° C. is used, the cold resistance of the obtained undercoat layer is inferior, and when the emulsion is bent under 0 ° C. conditions, it breaks. However, when an emulsion of a synthetic resin having a glass transition point of 30 ° C. or lower is used, the surface of the obtained undercoat layer becomes sticky, making it difficult to form a printed pattern. On the other hand, this stickiness can be suppressed by adding the above-mentioned inorganic filler. However, if an excessive amount of the inorganic filler is added, there arises a problem that the undercoat layer becomes brittle.

That is, in the present invention, by selecting and using an emulsion of a synthetic resin having a glass transition point of 30 ° C. or less, the cold resistance required for the flooring material is satisfied and an inorganic filler is added. When the emulsion of the synthetic resin having a glass transition point of 30 ° C. or less is used, the inorganic filler is used in an amount of 50 parts by weight per 100 parts by weight of the solid content of the synthetic resin. It is necessary that the inorganic filler be a synthetic resin solid content of 100
If it is added in excess of 300 parts by weight per part by weight, there arises a problem that the undercoat layer becomes brittle. Therefore, the amount of the inorganic filler added is limited to 30 parts by weight per 100 parts by weight of the synthetic resin solids.
Even when the amount is 0 parts by weight or less, it is necessary to select and use a synthetic resin capable of sufficiently suppressing stickiness, specifically, an emulsion of a synthetic resin having a glass transition point of -30 ° C or higher.

The glass transition point of the synthetic resin is particularly preferably from -20 ° C. to 0 ° C., and the amount of the inorganic filler added to the synthetic resin emulsion is particularly preferably 100% or more. 150 per part by weight
２５０250 parts by weight.

The synthetic resin emulsion or rubber latex for forming the undercoat layer may contain, if necessary, antimony trioxide, antimony pentoxide, zinc borate, magnesium triphosphate, guanidine sulfamate, thiourea, phosphoric acid, and the like. Non-halogen flame retardants such as guanidine; acrylate copolymers, sodium polyacrylate, carboxymethylcellulose, hydroxyethylcellulose, various polymer surfactants, viscosity modifiers such as polyvinyl alcohol; printability improvers such as emulsified terpenes A drying retarder such as ethylene glycol, diethylene glycol, or polyethylene glycol; an antiblocking agent such as stearic acid salt, silicone oil or paraffin wax; a defoaming agent such as mineral oil; an organic or aluminosilicate containing no halogen such as sorbic acid; Inorganic such as acid salt Antibacterial and antifungal agents, deodorants, crosslinking agent such as an epoxy resin; dispersing agents; may be added such as various additives, vulcanizing agent, a colorant such as a pigment.

The synthetic resin emulsion or rubber latex to which the above-mentioned inorganic filler and various additives have been added is uniformly mixed and dispersed by a suitable mixer, and then is mixed with a doctor knife coater, roll coater, air knife coater, or the like. It is applied to the surface of the fibrous base material by an appropriate means, and is dried and solidified to form an intermediate layer. This undercoating layer needs to be formed at least on the front side of the fibrous base material (the side on which the printed pattern is formed), and a similar layer is formed on the back side of the fibrous base material (the side on which the cushion layer is formed). It may be formed.

Since the synthetic resin emulsion or rubber latex is partially impregnated into the fibrous base material, the fibrous base material is exposed if the amount of coating is too small, and it is difficult to apply a printed pattern clearly. There is a concern that if the coating amount is too large, there is a concern that the thickness of the undercoat layer becomes too thick and warpage or the like is likely to occur. Excluding the impregnated part) is 0.05-1.0mm
It is desirable to adjust the amount of coating so that the amount is about the same.

The viscosity of the mixed / dispersed liquid of the synthetic resin emulsion or rubber latex, the inorganic filler and the various additives is adjusted so as to ensure the surface smoothness of the undercoat layer and to prevent the application unevenness. 2000-20000c
It is desirable to adjust to about ps.

The printed pattern formed on the above-mentioned undercoat layer is:
Once using a commonly used solvent-based or water-based printing ink, with an appropriate printing machine such as a gravure printer,
It may be formed by printing several times, or may be formed using so-called transfer paper. Of course, this printing pattern may include so-called solid printing.

The transparent top layer formed on the printed undercoat layer may be made of a single layer of acrylate, methacrylic ester, acrylic acid, methacrylic acid, acrylamide, acrylonitrile or the like as in the case of the undercoat layer. Acrylic resin such as polymer or copolymer; acrylic-styrene copolymer resin; ethylene-vinyl acetate copolymer resin;
One or more synthetic resins selected from water-soluble polyester resins; and the like can be used. The synthetic resin contained in the synthetic resin emulsion forming the transparent top layer preferably has a glass transition point of -30C to 30C. Of course, as long as the properties described below are not impaired, those having a glass transition point of 30 ° C. or less and those having a glass transition point of more than 30 ° C. may be mixed.
Furthermore, SBR latex, MBR latex, NB
R latex, rubber latex such as IIR latex,
Alternatively, a transparent top layer can be formed by a mixture of these.

It is desirable to add a so-called matting agent to the synthetic resin emulsion or rubber latex forming the transparent top layer in an amount of 10 to 300 parts by weight per 100 parts by weight of the synthetic resin or rubber solids. By adding this matting agent, the stickiness of the floor material surface can be suppressed. In addition, even if an inorganic filler such as calcium carbonate or aluminum hydroxide is added to the synthetic resin emulsion or rubber latex that forms the transparent top layer,
Stickiness can be suppressed, but in this case, it is not preferable because a problem of impairing the transparency of the top layer occurs.

As the matting agent, silica, silicate,
Although white fine particles such as alumina can be used as they are, they have poor dispersibility in synthetic resin emulsions and rubber latex, so silica fine particles such as silica sol, silicate sol, alumina sol, titanium sol, and nickel sol are dispersed to form a sol. It is desirable to use one that has been used. As the white fine particles, those having an average particle size of about 7 to 50 nm are particularly suitable.

The matting agent has a glass transition point of 50 to 200 ° C., particularly preferably 80 to 120 ° C.
And an average particle size of 1 to 100 μm, particularly preferably 1 to 100 μm.
Acrylic resin granules of 0 to 80 μm can also be used. Since the acrylic resin particles are excellent in dispersibility in the above synthetic resin emulsion, they can be added as they are without forming them into a sol as in the case of the above white fine particles. Is not reduced. Further, by adding the acrylic resin particles, there is an advantage that the surface strength (abrasion resistance, scratch resistance, etc.) of the surface of the transparent top layer (that is, the floor material surface) is further improved.

In the case where the transparent top layer is formed of a synthetic resin emulsion, as in the case of the intermediate layer,
In order to ensure cold resistance, it is necessary to use an emulsion of a synthetic resin having a glass transition point of 30 ° C. or lower,
Also in this case, there is a concern that the surface is sticky and dirt easily adheres. Therefore, by adding the above-mentioned matting agent, the stickiness is eliminated. Particularly preferably, the synthetic resin in the synthetic resin emulsion forming the transparent top layer has a glass transition point of -20 ° C to 0 ° C.
C. synthetic resin, and the addition amount of the matting agent is particularly preferably 50 to 15 per 100 parts by weight of the synthetic resin solids.
0 parts by weight.

In the synthetic resin emulsion or rubber latex that forms the transparent top layer, the resulting transparent top layer has further antifouling properties and water-whitening resistance (the property of preventing whitening when moisture adheres). A water repellent may be added in addition to the above in order to impart the water repellent. The amount of the water repellent added is 5 to 50 parts by weight, particularly preferably 10 to 30 parts by weight, per 100 parts by weight of the solid content of the synthetic resin or rubber. Of course, the above-mentioned water repellent may be added to a synthetic resin emulsion or a rubber latex that forms an undercoat layer.

In addition, even when the above-mentioned acrylic resin granules are used as a matting agent, the above-mentioned water repellent can be added, but the acrylic resin granules are used as a matting agent. If used, a flooring material sufficiently excellent in antifouling property and water whitening resistance can be obtained without adding the above water repellent.

The synthetic resin emulsion or rubber latex for forming the transparent top layer may contain, if necessary, a non-halogen flame retardant and a viscosity modifier, as in the case of the synthetic resin emulsion or rubber latex for forming the intermediate layer. Various additives such as drying retarder, anti-adhesive agent, defoamer, antibacterial / antifungal agent, deodorant, cross-linking agent, vulcanizing agent, dispersant, etc. can be added and transparency is not impaired Within the range, a trace amount of a coloring agent can be added.

The above-mentioned synthetic resin emulsion or rubber latex to which the matting agent and various additives have been added is uniformly mixed and dispersed by an appropriate mixer, and then is mixed with a doctor knife coater, roll coater, air knife coater or the like. It is applied and dried and solidified by an appropriate means to form a transparent top layer.

When the transparent top layer is dried and solidified, it is preferable to raise the temperature to about three stages in order to form a uniform film. For example, in the initial stage, the drying is carried out by sufficiently drying at a low temperature, then drying completely at an intermediate temperature, and further drying and solidifying at a temperature that promotes self-crosslinking. Needless to say, the means for drying by raising the temperature to about three stages as described above is not limited to the case where the transparent top layer is formed, but can also be applied to the case where the above-described intermediate layer or the cushion layer described later is formed.

If the transparent top layer is too thin, the printed pattern may be worn out during use because of poor abrasion resistance. If the transparent top layer is too thick, warpage tends to occur. Therefore, it is desirable to adjust the amount of the above-mentioned synthetic resin emulsion or rubber latex so that the thickness of the transparent top layer is about 0.05 to 0.3 mm.

Furthermore, the viscosity of the mixture / dispersion of the synthetic resin emulsion or rubber latex, the inorganic filler and the various additives is used to ensure the surface smoothness of the transparent top layer and to prevent coating variations. , 2000-
It is desirable to adjust to about 20,000 cps.

The halogen-free cushion layer formed on the back surface of the fibrous base material is formed by laminating a halogen-free synthetic resin or rubber foam, or a mechanically foamed halogen-free synthetic resin or rubber latex. Apply
A product formed by drying and solidifying, a product obtained by applying and heating and foaming a halogen-free synthetic resin emulsion or rubber latex to which a foaming agent or / and a swelling agent has been added / dispersed, and a hollow balloon added / dispersed. Apply a halogen-free synthetic resin emulsion or rubber latex
And those formed by drying and solidifying.

Examples of the above-mentioned halogen-free synthetic resin foam include polyethylene such as low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, and high-density polyethylene; polypropylene; polybutene;
Olefin-based resin foams such as vinyl acetate copolymer resin, ethylene-propylene copolymer resin, ethylene-based copolymer resin of ethylene and α-olefin having 4 to 10 carbon atoms; polystyrene and styrene-based copolymer A synthetic resin such as a styrene-based resin such as a polymer resin, or a foam made of a mixture thereof can be used.However, for reasons such as a small decrease in dent recovery in long-term use, preferably,
It is an olefin-based resin foam, particularly a foam made of polyethylene or an ethylene-based copolymer resin. Also,
The olefin-based resin foam may be a crosslinked foam or a non-crosslinked foam, but is preferably a crosslinked foam. On the other hand, as the rubber containing no halogen, natural rubber, butadiene rubber, styrene-butadiene rubber,
Rubber selected from syndiotactic-1,2-polybutadiene, isoprene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, propylene-diene terpolymer, butyl rubber, acrylic rubber, silicone rubber, polysulfide rubber, or a mixture thereof Etc. can be used. The expansion ratio of the above foam is preferably about 5 to 30 times. In addition, the above-mentioned foamed material is used to satisfy various physical properties required as a flooring material, specifically, hardness, strength, compressive strength, and the like. Rate, copolymerization ratio, etc.), expansion ratio, thickness and the like.

As the means for laminating the above-mentioned foam on the back surface of the fibrous base material, any method may be used as long as it has been conventionally used. Specifically, an adhesive is applied. Wet lamination method (wet lamination method), and then drying after applying an adhesive, dry laminating method (dry lamination method) of laminating and compressing both, and heat melting. After applying the adhesive, the two are immediately bonded to each other and cooled to room temperature. Hot melt laminating method, a synthetic resin in the molten state extruded from the T-die of the extruder is sandwiched between the fibrous base material and the foam. And a method such as an extrusion lamination method in which pressure is applied by a pair of rolls or the like.

The means for forming the cushion layer is not limited to the means for laminating the foam as described above, but may be formed by applying and drying and solidifying a mechanically foamed synthetic resin emulsion or rubber latex. Means for applying, heating and foaming a synthetic resin emulsion or rubber latex to which a foaming agent or / and a swelling agent has been added / dispersed, and applying an emulsion or rubber latex of a synthetic resin to which a hollow balloon has been added / dispersed. It can also be formed by applying a halogen-free synthetic resin emulsion or rubber latex, such as a means of drying and solidifying, to the back surface of the fibrous base material.

As described above, the means for forming the cushion layer by applying a halogen-free synthetic resin emulsion or rubber latex to the back surface of the fibrous base material is most preferably the above-mentioned mechanically foamed synthetic resin emulsion or This is a means of applying and drying and solidifying rubber latex. That is, when foaming is performed using a chemical foaming agent or the like, there is a problem that it is difficult to control the thickness and a problem that the cost is high, and also when a hollow balloon is used, there is a problem that the cost is high. Therefore, thickness control is easy,
It is most preferable to apply and dry and solidify the above-mentioned mechanically foamed synthetic resin emulsion or rubber latex which can be obtained at low cost.

Examples of the synthetic resin contained in the above synthetic resin emulsion include acrylic resins such as homopolymers or copolymers of acrylic acid esters, methacrylic acid esters, acrylic acid, methacrylic acid, acrylamide and acrylonitrile; A styrene copolymer resin;
One or more synthetic resins selected from ethylene-vinyl acetate copolymer resins; water-soluble polyester resins; and the like can be used. Examples of the rubber latex include SBR latex, MBR latex, NBR latex, and IIR latex.
Rubber latex such as latex or a mixture thereof can be used.

Further, if necessary, antimony trioxide, antimony pentoxide, zinc borate, magnesium tertiary phosphate, magnesium phosphite, guanidine sulfamate, thiourea, and the like may be added to the above synthetic resin emulsion or rubber latex. Non-halogen flame retardants such as guanidine phosphate; acrylate copolymer, sodium polyacrylate, carboxymethylcellulose, hydroxyethylcellulose, various polymer surfactants, viscosity modifiers such as polyvinyl alcohol; printing such as emulsified terpenes Suitability improvers; Drying retarders such as ethylene glycol, diethylene glycol and polyethylene glycol; stearates,
Foam stabilizers such as various surfactants; crosslinking agents such as epoxy resins and maleic acid copolymer resins; vulcanizing agents; antibacterial and antifungal agents; deodorants; non-halogen preservatives; dispersants; And various additives such as a colorant.

When the cushion layer is formed using a synthetic resin emulsion or rubber latex that has been mechanically foamed, air is mechanically mixed into the synthetic resin emulsion or rubber latex to which various additives are added as necessary. And
Mechanically foamed to a foaming ratio of about 1.5 to 3 times, applied to the back surface of the fibrous base material by an appropriate means such as a doctor knife coater or an air knife coater, and dried and solidified to form a cushion layer. I do. At this time, if the expansion ratio is too high, the dispersion of the air is poor and the cells become coarse, and the rigidity as a floor material is lost.

On the other hand, when the cushion layer is formed using a synthetic resin emulsion or rubber latex containing a chemical foaming agent or an expanding agent, a synthetic resin emulsion or rubber latex to which an appropriate amount of a chemical foaming agent or the like has been added and dispersed. Is applied to the back surface of the fibrous base material, and heated and foamed at an appropriate temperature to form a cushion layer.When the cushion layer is formed using a synthetic resin emulsion or rubber latex containing a hollow balloon, the hollow layer is used. A cushion layer is formed by applying a synthetic resin emulsion or rubber latex to which a suitable amount of balloon is added and dispersed on the back surface of the fibrous base material, followed by drying and solidification.

The thickness of the cushion layer obtained as described above is desirably 0.5 to 5 mm, preferably about 1 to 3 mm. If the cushion layer is too thin, good cushioning properties cannot be obtained, and if the cushion layer is too thick, warpage or the like may occur.

The non-halogen cushioning flooring material of the present invention obtained as described above can be embossed on the surface and adjusted for gloss, etc., like the cushioning flooring material made of vinyl chloride resin. An intended surface treatment layer can also be formed. When embossing is performed, it is preferable to perform embossing before forming the cushion layer.

On the back side of the cushion layer, a backing material such as a sheet made of a synthetic resin or the like containing no halogen, an organic fiber non-woven fabric, or a laminate thereof may be laminated. A reinforcing material such as an organic fiber nonwoven fabric or an orthogonal cloth can be interposed between the material and the material.

[0042]

Hereinafter, the present invention will be described in more detail with reference to specific examples. However, the present invention is not limited to the following examples.

Example 1 A glass-pulp mixed nonwoven fabric (containing 50% by weight of glass fiber) having a thickness of 0.2 mm was coated on a surface with an acrylic ester copolymer resin emulsion having the composition shown in Table 1 and mixed by a mixer. Apply with a doctor knife coater,
It is dried in an oven to form an intermediate layer having a thickness of 0.1 mm (excluding the portion impregnated in the glass-pulp mixed nonwoven fabric). Then, the surface of the intermediate layer is printed with a gravure printing machine. And a printed pattern was formed.

[0044]

[Table 1]

Next, an acrylic ester copolymer resin emulsion having the composition shown in Table 2 and mixed by a mixer was applied by a doctor knife coater and dried in an oven to form a transparent top layer having a thickness of 0.1 mm. Was formed.

[0046]

[Table 2]

As described above, an intermediate layer, a printed pattern, and a transparent top layer are sequentially formed on the surface of the glass-pulp mixed nonwoven fabric, and then the surface is subjected to design embossing. On the side, a crosslinked polyethylene foam having a thickness of 2.3 mm and a foaming ratio of 15 was laminated using an adhesive to obtain a flooring material of the present invention. The obtained flooring material clearly showed printed patterns, was excellent in design, and did not show any warpage or the like. In addition, when the obtained flooring material was applied to the floor of the office entrance where people enter and exit sharply, even after a long period of time, the dent recovery was not impaired, showing good cushioning properties, and Also, surface dirt could be easily removed.

FIG. 1 is a partially enlarged cross-sectional view of the flooring of the first embodiment. Reference numeral 1 in the figure is the flooring material of the present invention, and reference numeral 11
Is a glass-pulp mixed nonwoven fabric (fibrous base material);
Denotes a middle layer, 13 denotes a printed pattern, 14 denotes a transparent top layer, and 15 denotes a crosslinked polyethylene foam (cushion layer). In addition, reference numeral 16 in the figure is
An adhesive used for laminating the glass-pulp mixed nonwoven fabric 11 and the crosslinked polyethylene foam.

Example 2 A floor material was obtained in the same manner as in Example 1 except that the composition of the transparent top layer was changed to that shown in Table 3.

[0050]

[Table 3]

The obtained flooring material had clear printed patterns, was excellent in design, and did not show any warpage. In addition, when the obtained flooring material was applied to the floor of the office entrance where people enter and exit sharply, even after a long period of time, the dent recovery was not impaired, showing good cushioning properties, and Also, surface dirt could be easily removed. Further, this flooring material was also superior in surface strength (abrasion resistance and scratch resistance) to the flooring material of Example 1.

Example 3 A flooring material was obtained in the same manner as in Example 1 except that the composition of the undercoat layer was changed to that shown in Table 4 and the composition of the transparent top layer was changed to that shown in Table 5.

[0053]

[Table 4]

[0054]

[Table 5]

The obtained flooring material clearly showed printed patterns, was excellent in design, and did not show any warpage or the like. In addition, when the obtained flooring material was applied to the floor of the office entrance where people enter and exit sharply, even after a long period of time, the dent recovery was not impaired, showing good cushioning properties, and Also, surface dirt could be easily removed. Further, this flooring material was superior in surface strength (abrasion resistance and scratch resistance) to the flooring material of Example 1 and also excellent in deodorant properties.

Example 4 A cushion layer having the composition shown in Table 6 was obtained by applying a rubber latex twice mechanically foamed using an Oaks mixer with a doctor knife and then drying and solidifying in an oven. A floor material was obtained in the same manner as in Example 2, except that the cushion layer was replaced with a cushion layer having a thickness of 1.5 mm.

[0057]

[Table 6]

The obtained flooring material had clear printed patterns, excellent design properties, and no occurrence of warpage or the like. In addition, when the obtained flooring material was applied to the floor of the office entrance where people enter and exit sharply, even after a long period of time, the dent recovery was not impaired, showing good cushioning properties, and Also, surface dirt could be easily removed. Further, this flooring material was also superior in surface strength (abrasion resistance and scratch resistance) to the flooring material of Example 1.

[0059]

Although the non-halogen cushioning flooring material of the present invention is made of a halogen-free synthetic resin such as an acrylic resin or the like, the flooring material has a low physical property required for the conventional flooring material. Of the cushioning floor material made of vinyl chloride resin.

The glass transition point of the synthetic resin contained in the synthetic resin emulsion forming the intermediate layer and the transparent top layer is set to a specific range, and the amount of the inorganic filler or matting agent to be added is set to a specific range. By doing so, it is excellent in printability when applying a printed pattern on the undercoating layer, and it can prevent stickiness on the surface of the transparent top layer, so it is excellent in design and excellent in antifouling properties Can be obtained.

Further, by adding specific acrylic resin particles as a matting agent to be added to the synthetic resin emulsion or the like forming the transparent top layer, further antifouling property is imparted and water whitening resistance is excellent. Thus, a flooring material having excellent surface strength such as wear resistance and scratch resistance can be obtained.

[Brief description of the drawings]

FIG. 1 is a partially enlarged cross-sectional view of a floor material according to a first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flooring material 11 Glass-pulp mixed nonwoven fabric (fibrous base material) 12 Undercoat layer 13 Printing pattern 14 Transparent top layer 15 Cross-linked polyethylene foam (cushion layer) 16 Adhesive

Claims (9)

[Claims] At least a fibrous base material, an intermediate layer formed by coating and drying and solidifying an emulsion or rubber latex of a synthetic resin containing no halogen on the fibrous substrate, and printing on the intermediate layer. A transparent top layer formed by applying and drying and solidifying an emulsion or rubber latex of a synthetic resin containing no halogen on the undercoat layer on which the pattern or printed pattern is formed, and a cushion layer containing no halogen formed on the back surface of the fibrous base material. And a non-halogen cushioning flooring material. 2. The synthetic resin contained in a synthetic resin emulsion forming an undercoat layer has a glass transition point of −30 ° C. to 3 ° C.
The non-halogen cushioning flooring material according to claim 1, which is at 0 ° C. 3. The synthetic resin emulsion or rubber latex forming the undercoat layer contains 50 to 300 parts by weight of an inorganic filler based on 100 parts by weight of the synthetic resin or rubber solids. 2. The non-halogen cushioning flooring material according to 2. 4. The glass transition point of the synthetic resin contained in the synthetic resin emulsion forming the transparent top layer is -30.
The non-halogen cushioning flooring material according to any one of claims 1 to 3, wherein the temperature is from 30C to 30C. 5. The synthetic resin emulsion or rubber latex forming the transparent top layer contains 10 to 300 parts by weight of a matting agent based on 100 parts by weight of synthetic resin solids or rubber solids. The non-halogen cushioning flooring material according to claim 1. 6. A matting agent having a glass transition point of 50 to 20.
The non-halogen cushioning flooring material according to claim 5, which is an acrylic resin granule having an average particle diameter of 1 to 100 µm at 0 ° C. 7. The cushion layer is a layer formed by laminating a synthetic resin or rubber foam containing no halogen.
6. The non-halogen cushioning flooring material according to any one of 6. 8. A synthetic resin foam containing no halogen,
The non-halogen cushioning flooring according to claim 7, which is a crosslinked olefin resin foam. 9. A cushion layer is provided on the back surface of the fibrous base material,
Layer formed by applying and drying and solidifying a halogen-free synthetic resin emulsion or rubber latex that has been mechanically foamed, and a halogen-free synthetic resin emulsion or rubber latex containing a foaming agent or / and an expanding agent added and dispersed. A layer formed by applying and heating and foaming, or a layer formed by applying and drying and solidifying an emulsion or rubber latex of a halogen-free synthetic resin to which a hollow balloon is added / dispersed. 6. The non-halogen cushioning flooring material according to any one of 6.