JP3470848B2 - Floor material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flooring material having excellent surface maintainability, stain resistance, adhesion to wax, etc. and excellent maintainability.

[0002]

2. Description of the Related Art Conventionally, flooring made of vinyl chloride resin is often used for flooring of buildings and condominiums.
However, a floor material made of vinyl chloride resin has a problem that it produces a large amount of smoke containing harmful hydrogen chloride gas at the time of fire, which adversely affects the human body and hinders evacuation and fire extinguishing activities. Further, since it contains a large amount of a plasticizer and a stabilizer, there is a problem that the odor is strong.

Therefore, the present inventors have paid attention to polypropylene that does not contain halogen, and have added ethylene
A floor material made by mixing a vinyl acetate copolymer with calcium carbonate has been proposed (Japanese Patent Application No. 5-296154).

This floor material is made of polypropylene and ethylene-
Since it contains a vinyl acetate copolymer, it has the advantages that it does not have the brittleness found in polypropylene flooring materials up to that time, and the stain resistance and scratch resistance are improved to some extent. It was

[0005]

However, the above-mentioned floor materials do not show a significant improvement in surface gloss even when polished with a polisher (buffing machine), and the stain resistance and scratch resistance cannot be said to be sufficiently improved. Therefore, there is a problem that the surface is easily soiled and easily scratched, and when the surface gloss is lowered due to the scratch, there is a problem that the surface gloss is not sufficiently recovered even by polishing with a polisher. Moreover, since the adhesiveness with the wax is poor, there is a problem that the floor material is easily peeled off even when the wax or the like is applied to the surface of the floor material, and it is hard to say that the maintainability by the polisher is good.

An object of the present invention is to solve the above problems and to provide a flooring material which is excellent in maintainability by a polisher.

[0007]

In order to achieve the above object, the flooring material according to claim 1 of the present invention comprises 30 to 70 parts by weight of polyethylene and ethylene having a vinyl acetate content of 71 to 90% by weight. 70 to 30 parts by weight of a vinyl acetate copolymer and 50 to 300 parts by weight of an inorganic filler are blended.

Further, the flooring material of claim 2 contains 30 to 70 parts by weight of polyethylene, 35 to 15 parts by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate content of 71 to 90% by weight, and vinyl acetate. Ethylene of 15-70% by weight
It is characterized in that it comprises 35 to 15 parts by weight of a vinyl acetate copolymer and 50 to 300 parts by weight of an inorganic filler.

The flooring material of claim 3 is characterized in that the polyethylene is high density polyethylene.
The flooring material is characterized by further mixing rosin in a proportion of 1 to 15 parts by weight, and the flooring material of claim 5 is characterized in that a fiber layer such as a ginseng is laminated on the back surface.

Further, in the flooring material of claim 6, 30 to 70 parts by weight of polyolefin is mixed with 70 to 30 parts by weight of an ethylene-vinyl acetate copolymer and 50 to 300 parts by weight of an inorganic filler. The flooring material according to claim 7, wherein the backing layer is laminated on the backing surface, wherein the backing layer contains 1 to 15 rosin.
The composition is further blended in a ratio of parts by weight, and
The floor material is characterized by laminating a fiber layer such as a ginseng on the bottom surface of the back surface layer.

As described above, in 30 to 70 parts by weight of polyethylene, an ethylene-vinyl acetate copolymer having a vinyl acetate content of 71 to 90% by weight [hereinafter, EVA (VA: 71
.About.90%)] in the proportion of 70 to 30 parts by weight as the base resin, and the floor material of 30 to 70.
In parts by weight of polyethylene, EVA (VA: 71-90
%) 35 to 15 parts by weight, and the vinyl acetate content is 15 to 7
0% by weight of ethylene-vinyl acetate copolymer [hereinafter referred to as EV
A (VA: 15 to 70%)] is used as a base resin in a proportion of 35 to 15 parts by weight. -It has almost the same initial surface gloss as the previously proposed flooring material (hereinafter referred to as the previous flooring material) in which a material containing a vinyl acetate copolymer is used as the base resin.

However, when the surface is polished with a polisher (buffing machine), the surface gloss of the above floor material is not so improved, as can be seen from the experimental data described later.
The floor material of claim 2 has a remarkably improved surface gloss. Further, when the surface is scratched to reduce the surface gloss and then the surface is polished with a polisher, the surface gloss of both the floor material of claim 1 and claim 2 is recovered, but the floor material of the previous floor material is recovered. The surface gloss after recovery is not so good, whereas the floor coverings of claims 1 and 2 have very good surface gloss after recovery. Moreover, as can be seen from the experimental data described below, the floor materials of claims 1 and 2 have extremely good stain resistance, scratch resistance, and adhesion to wax of the surface layer as compared with the previous floor materials. is there. Therefore, the flooring material according to claim 1 and claim 2 of the present invention,
The maintainability by the polisher is greatly improved compared to the previous floor material.

As described above, the physical properties of the surface of the flooring material of claims 1 and 2 are remarkably improved, and the maintainability is significantly improved, because the side chain (-CH) is used as the first component resin.
₃ ) Polyethylene having a linear molecular structure with a small number of side chains is used in place of the polypropylene having ₃ ), and EVA (VA: 71 to 90) blended as the second component resin.
%) Has excellent compatibility with polyethylene, has many polar groups,
Since it is crystalline and has a relatively large hardness, it effectively acts to improve the above-mentioned physical properties, and EVA (VA: 15) blended as the third component resin in the flooring material of claim 2.
(-70%) does not have very large polarity and hardness, but it works in good harmony with the second component resin EVA (VA: 71-90%) to act synergistically to improve the above physical properties, etc. It is thought to be due to the reason.

The first component resin, polyethylene, is preferably high-density polyethylene having a small number of molecular branches, and the floor tile according to claim 3 using such high-density polyethylene uses low-density polyethylene. The effect of improving the above physical properties is more remarkable than that.

In the flooring material according to claim 1, the amount of polyethylene is less than 30 parts by weight, and EVA (VA: 71 to 90)
%) Is more than 70 parts by weight, the adhesion to the wax is significantly improved, but the surface gloss is significantly reduced.
Stain resistance and scratch resistance are also reduced. Further, in the flooring material of claim 2, polyethylene is less than 30 parts by weight,
VA (VA: 71 to 90%) and EVA (VA: 15 to 7)
0%) and the total amount exceeds 70 parts by weight,
It is the same.

On the other hand, in the flooring material of claim 1, the amount of polyethylene is more than 70 parts by weight, and EVA (VA: 71-
When 90%) is less than 30 parts by weight, the surface gloss is improved, but the scratch resistance is slightly deteriorated and the adhesion with the wax is significantly reduced. Further, in the flooring material of claim 2, the surface layer contains less than 70 parts by weight of polyethylene, and EVA (VA: 71 to 90%) and EVA (VA: 1
The same applies when the total amount of (5 to 70%) is more than 30 parts by weight.

Ethylene to be blended as the second component resin
It is necessary to use a vinyl acetate copolymer having a vinyl acetate content of 71 to 90% by weight as described above, and a vinyl acetate copolymer having a vinyl acetate content of 70% by weight or less should be adhered to a wax. It is not suitable as the second component resin because it cannot significantly improve the stain resistance. Also,
When a copolymer having a vinyl acetate content of more than 90% by weight is used, the surface layer is hardened more than necessary, which is also unsuitable as the second component resin.

Furthermore, the ethylene-vinyl acetate copolymer blended as the third component resin in the flooring material of claim 2 is
It is necessary to use one having a vinyl acetate content of 15% by weight or more, and when a copolymer having a vinyl acetate content lower than this is blended with EVA (71 to 90%) of the second component resin, EVA ( 71 to 90%) is more unsuitable because it has a stronger effect of impairing the stain resistance improving effect and the wax adhesion improving effect. The upper limit of the vinyl acetate content of the copolymer to be blended as the third component resin (7
0% by weight) is the EVA compounded as the second component resin.
It has only the meaning to show the boundary with (71 to 90%).

In the flooring material of claims 1 and 2, the compounding amount of the inorganic filler in the surface layer is 50 to 30 as described above.
It is necessary to set the content within the range of 0 parts by weight, and if it is added in a larger amount, the floor material becomes brittle, and if it is added in a smaller amount, the flame retardancy of the floor material decreases.

When the rosin is further mixed in a proportion of 1 to 15 parts by weight as in the flooring material of claim 4, the adhesion with the wax is further improved and the maintainability is further improved.
Then, as in the flooring material of claim 5, when a fiber layer such as a gauze cloth is laminated on the back surface, the adhesiveness is improved.

The flooring material of the present invention may have a single-layer structure, but may have a multi-layered structure by laminating the back surface layer as in the flooring material of claim 6. Since the back surface layer does not need to improve surface gloss, stain resistance, scratch resistance, adhesion to wax, etc., polyolefin is not limited to polyethylene as the first component resin, and ethylene-vinyl acetate copolymer The vinyl acetate content of the combined product is also not particularly limited. However, the composition of the back layer must be such that the ethylene-vinyl acetate copolymer is 70 to 30 parts by weight and the inorganic filler is 50 to 300 parts by weight with respect to 30 to 70 parts by weight of the polyolefin. Is more than 70 parts by weight, the amount of ethylene-vinyl acetate copolymer is less than 30 parts by weight, and the amount of the inorganic filler is more than 300 parts by weight, the back surface layer becomes hard and brittle, and the adhesiveness decreases. It causes inconvenience. On the contrary, the amount of polyolefin is less than 30 parts by weight and the amount of ethylene-vinyl acetate copolymer is 7%.
If the amount is more than 0 parts by weight and the amount of the inorganic filler is less than 50 parts by weight, disadvantages such as a decrease in flame retardance of the back surface layer and an increase in residual recesses occur.

When the rosin is mixed in the backside layer at a ratio of 1 to 15 parts by weight, as in the flooring material of claim 7,
The adhesion to the floor and the ground is improved, and when a fiber layer such as a gauze cloth is laminated on the bottom surface of the back surface layer as in the floor material of claim 8, the adhesion is further improved.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view of a flooring material according to an embodiment of the present invention, and FIG. 2 is a sectional view thereof.

This floor material has a side length of 30 to 45 cm.
Square tiles (floor tiles)
Then, the back surface layer 2 is laminated and integrated on the back surface of the flooring material main body 1, and the fiber layer 3 such as gauze cloth is laminated on the bottom surface of the back surface layer 2 in a partially embedded state.

The flooring material main body 1 has 30 to 70 parts by weight of polyethylene and 70 to 30 parts of EVA (VA: 71 to 90%).
By weight, the inorganic filler is mixed in a ratio of 50 to 300 parts by weight, and its preferable thickness is about 1 to 5 mm, but it is not particularly limited.

As the polyethylene, high density polyethylene (specific gravity: about 0.94 to 0.96) produced by the medium / low pressure method and having little branching of molecules is preferably used.
Low density polyethylene manufactured by high pressure method (specific gravity: 0.9
Of course, about 2) can also be used.

As the inorganic filler, various conventionally known fillers can be used. Among them, calcium carbonate powder having an average particle diameter of 10 μm or less, and calcium carbonate powder and aluminum hydroxide powder are used. Mixed powders are preferably used. Although it is possible to impart flame retardancy to the flooring material main body 1 by simply adding calcium carbonate powder,
When a mixed powder of calcium carbonate powder and aluminum hydroxide powder is blended, aluminum hydroxide releases water during thermal decomposition, so that a floor material having high flame retardancy can be obtained.

Polyethylene, EVA (VA: 71-90
%), The reason why each of the inorganic fillers has the above blending ratio, and EVA as an ethylene-vinyl acetate copolymer.
The reason for selectively using (VA: 71 to 90%) has already been described in detail, and thus the description thereof is omitted here.

It is desirable to further mix 1 to 15 parts by weight of rosin in the flooring material main body 1, and if the rosin is mixed in this way, the adhesion to the wax will be more significantly improved. If the amount of rosin added exceeds 15 parts by weight,
There is a possibility that the hue of the flooring material main body 1 becomes unstable, and if it is less than 1 part by weight, it becomes difficult to remarkably improve the adhesion to the wax.

If necessary, the flooring body 1 may include pigments, peroxide crosslinking agents, coupling agents, lubricants such as bisamides, phenolic antioxidants, hindered amine light stabilizers, and the like. A small amount of various additives may be contained.

On the other hand, the back surface layer 2 contains 30 to 70 parts by weight of polyolefin and 70 parts of ethylene-vinyl acetate copolymer.
˜30 parts by weight and an inorganic filler in a proportion of 50 to 300 parts by weight, and the thickness thereof is about 0.5 to 5 mm, but is not particularly limited.

Polyethylene, polypropylene or the like is used as the polyolefin of the back surface layer 2, and the same inorganic fillers as described above are used. Further, as the ethylene-vinyl acetate copolymer, all commercially available products can be used regardless of the vinyl acetate content. As described above, not only polyethylene but also other polyolefins can be used, and the vinyl acetate content of the ethylene-vinyl acetate copolymer does not matter, in the case of the back surface layer 2, surface gloss, stain resistance and scratch resistance. This is because it is not necessary to improve the adhesiveness with the wax. However, when forming the back layer 2 which is relatively soft and has cushioning properties, it is desirable to use an ethylene-vinyl acetate copolymer having a vinyl acetate content of 30 to 70% by weight.

The reason why the above blending ratios of the polyolefin, the ethylene-vinyl acetate copolymer, and the inorganic filler are used has already been described in detail, and the description thereof is omitted here.

It is desirable to further mix rosin in the back surface layer 2 in a proportion of 1 to 15 parts by weight. When the rosin is mixed in this way, the adhesion to the floor and ground is improved.
This is because rosin is highly compatible with the ethylene-vinyl acetate copolymer and has excellent adhesiveness with the inorganic filler, so that the inorganic filler is firmly held on the back surface layer 2 and the back surface layer 2 is fragile. This is because it has the function of suppressing the deterioration and improving the adhesive strength (peeling resistance) with the floor. Therefore, the flooring material in which the back surface layer 2 is mixed with rosin can be firmly adhered to the floor surface using a commercially available floor adhesive. If the blending amount of rosin is more than 15 parts by weight, the tensile strength of the back surface layer 2 may be lowered, and if it is less than 1 part by weight, it becomes difficult to significantly improve the adhesiveness.
Not preferable.

Furthermore, a fiber layer 3 such as a gauze cloth is laminated on the bottom surface of the back surface layer 2 in a partially embedded state, and the adhesion of the back surface layer 2 to the floor surface is achieved by a kind of anchoring action of the fiber layer 3. It is getting higher. As the fiber layer 3,
Various materials such as non-woven cloth, woven cloth, glass fiber, paper and the like are used in addition to ginseng.

Needless to say, a small amount of the above-mentioned additive may be added to the back surface layer 2 if necessary.

The floor tile composed of the front surface layer 1, the back surface layer 2 and the fiber layer 3 as described above can be manufactured, for example, by the following method.

First, 30 to 70 parts by weight of polyethylene and 70 to 30 parts by weight of EVA (VA: 71 to 90%).
And 50 to 300 parts by weight of the inorganic filler, and optionally 1 to 15 parts by weight of rosin and a small amount of additives,
Granulate with an extruder to make powder.

On the other hand, 30 to 70 parts by weight of polyolefin, 70 to 30 parts by weight of ethylene-vinyl acetate copolymer, 50 to 300 parts by weight of inorganic filler and, if necessary, 1 to 15 parts by weight. Mix rosin with a small amount of additives,
Sheeting is performed with an extruder to form a sheet serving as a back surface layer.

Then, a fiber layer is laid on the lower surface of this sheet,
The above-mentioned powder and granules are stacked on the upper surface of the sheet, heated, pressurized by a pressure roll or the like to be integrated, and then cut into a predetermined size to manufacture a tile-like flooring material. Note that the fiber layer will be the back surface layer 2 later.
You may make it thermocompression-bond to the bottom face of.

In the flooring material having the above structure, polyethylene is used instead of polypropylene, and ethylene-
EVA as a vinyl acetate copolymer (VA: 71-90
%), Polyethylene and EVA (VA: 71)
~ 90%) and the inorganic filler are mixed in the above-mentioned specific proportions to form the flooring material main body 1. Therefore, when the surface of the flooring material main body 1 is polished with a polisher (buff machine), the experimental data described later is obtained. As shown, the surface gloss is significantly improved. Moreover, the stain resistance, scratch resistance, and adhesion to wax of the flooring body 1 are significantly improved, and even if the surface is scratched and the surface gloss is reduced, the surface gloss becomes remarkable when the surface is polished with a polisher. Recover. Therefore, this floor material has very good maintainability by the polisher.

Further, since the back surface layer 2 is formed by mixing polyolefin, ethylene-vinyl acetate and the inorganic filler in the above-mentioned specific proportions, hardness and brittleness are improved,
In particular, ethylene with a vinyl acetate content of 30 to 70% by weight
Since the product containing the vinyl acetate copolymer is relatively flexible and has cushioning properties, it is possible to back up the flooring material main body 1 and provide a good feeling of pedaling. And, those containing rosin have improved adhesion to the floor,
Further, the flooring material in which the fiber layer 3 is laminated on the bottom surface of the back surface layer 2 has a significantly improved adhesiveness.

The flooring material of the above-mentioned embodiment uses polyethylene and EVA (VA: 71 to 90) as resin components of the flooring material main body 1.
%), But EVA as the third component resin
(VA: 15 to 70%) can also be blended. In that case, add 30 to 70 parts by weight of polyethylene to EVA.
(VA: 71 to 90%) 35 to 15 parts by weight, EVA
(VA: 15 to 70%) in an amount of 35 to 15 parts by weight and an inorganic filler in an amount of 50 to 300 parts by weight.
Need to be formed.

Polyethylene, EVA (VA: 71-90
%), EVA (VA: 15 to 70%), and the reason why the inorganic fillers are used in the above mixing ratios, respectively, and the reason that EVA (VA: 15 to 70%) is selected and used as the third component resin, Since it has already been described in detail, the description is omitted here.

If necessary, 1 to 15 parts by weight of rosin may be blended in the flooring material main body 1 to enhance the adhesion to the wax, or a small amount of the above-mentioned various additives may be blended. still,
Even if the composition of the flooring material main body 1 is changed as described above, the back surface layer may have the same composition as the back surface layer 2 of the above embodiment.

The flooring material with the composition of the flooring material main body 1 thus modified is also excellent in surface gloss, stain resistance, scratch resistance, and adhesion to wax, as shown in the experimental data described later, and is easy to maintain. Is very good.

The flooring material of the present invention may have a single layer structure having only the flooring material main body 1 by omitting the back surface layer 2. When the flooring material having such a single layer structure is used, the flooring material main body 1 It is desirable that the above-mentioned fiber layer 3 is laminated on the back surface of the above in a partially embedded state to enhance the adhesiveness.

[0049]

EXAMPLES Next, more specific examples and comparative examples of the flooring material of the present invention will be described.

[Example 1] 50 parts by weight of high-density polyethylene (HDPE2300 manufactured by Tosoh Corp., MFR:
7, density: 0.951) and an ethylene-vinyl acetate copolymer having a vinyl acetate content of 80% by weight [MFR: 15,
Hereinafter referred to as EVA (VA: 80%)] 50 parts by weight,
Calcium carbonate powder having an average particle diameter of 3 μm was uniformly kneaded at a ratio of 200 parts by weight, and this was pulverized to obtain a granular material having a particle diameter of 1.9 mm or less.

On the other hand, to 50 parts by weight of the above-mentioned high-density polyethylene, an ethylene-vinyl acetate copolymer having a vinyl acetate content of 45% by weight [MFR: 2.5, hereinafter EVA (V
A: 45%)] and 50 parts by weight of the above calcium carbonate powder were kneaded at a ratio of 200 parts by weight, and the mixture was sheeted with an extruder to form a sheet (thickness 1 mm) as a back surface layer.

Then, the above-mentioned powder and granules were laminated on this sheet, heated to 200 ° C. and pressed at 10 kg / cm ² to integrally form a flooring body 1 having a thickness of 2.5 mm. A sample of flooring material having a two-layer structure was prepared.

Regarding the sample of this flooring material, the degree of improvement of surface gloss by a polisher, the degree of recovery of surface gloss by a polisher after scratching the surface, stain resistance (discoloration degree), scratch resistance, and wax Adhesion
I checked it as follows.

Degree of Improvement of Surface Gloss by Polisher The above sample was pasted on a plastic substrate via a hard board made of paper, and a gloss meter (H manufactured by Suga Test Instruments Co., Ltd.) was used.
G-246) was used to measure the initial surface glossiness of the surface layer of this sample based on the test method of JIS K 7105. The results are 14 as shown in Table 1 below.
%Met.

Next, a low-speed polisher (floor electric polisher MPS-70 / 12 manufactured by Marubayashi Electric Machinery Co., Ltd.)
Using a nylon soft pad (Sumitomo 3M Co., Ltd. yellow pad) at a rotation speed of 250 rpm, 2
The surface of the sample was buffed (driaf) by rotating for 0 sec / m ² . Then, when the surface glossiness of the sample after buffing was measured by the same method as above using a gloss meter,
It increased to 26% as shown in Table 1 below. Similarly, the second dry lift operation and surface gloss measurement, the third
Repeatedly performing the dry raffle operation and measuring the surface glossiness, as shown in Table 1 below, shows that the surface glossiness after the second dry roof is 29% and the surface glossiness after the third dry roof is It was 35%, and the surface gloss was significantly improved.

Further, water a small amount of water on the surface of the sample,
After buffing the surface of the sample (wet buffing) in the same manner as above, the surface glossiness was measured. As a result, the surface glossiness was further improved and was 49% as shown in Table 1 below.

Degree of Restoration of Surface Gloss by Polisher After Scratching the Surface Instead of the above soft pad, a hard pad (green pad manufactured by Sumitomo 3M Ltd.) was attached to the polisher,
The surface of the sample was scratched by rotating the pad at 250 rpm for 20 sec / m ² , and the surface glossiness was measured. As a result, the surface glossiness was 8 as shown in Table 1 below.
Fell to%.

Next, the hard pad was replaced with the soft pad again, and the dry fluff operation and the measurement of the surface glossiness were repeated three times to examine the degree of recovery of the surface gloss of the sample. As a result, as shown in Table 1 below, the surface glossiness after the first buff is 19%, the surface glossiness after the second buff is 26%, and the surface glossiness after the third buff. Was 32%, and it was found that the surface gloss was restored to a state close to the state before the surface was scratched.

Further, the same wet buffing operation as described above was performed to measure the surface glossiness of the sample. As a result, the surface glossiness was 49% as shown in Table 1 below, and it was found that even in the case of a wet buff, the surface glossiness before being scratched was recovered.

Stain resistance (discoloration degree) With respect to a sample of a flooring material, the stain resistance when the surface layer was not abraded and scratched, and the stain resistance when the surface layer was abraded and scratched were I checked it as follows.

[Stain resistance when not scratched without abrasion] A rubber ring on which the abrasive paper is not wrapped according to the method of JIS A 1453 while dropping standard contaminants according to JIS L 1023 on the surface of the sample. The surface of the sample was abraded 80 times, and the removal of contaminants was stopped, and the aforesaid rubber ring was abraded 20 times. And JIS K
The color difference (ΔE) between the stain-free sample and the original stain-free sample was determined by the color-difference measuring method of 7105. As a result, the color difference was only 2. as shown in Table 2 below.
It was 7%.

[Stain resistance when worn and scratched] J
Based on the method of IS A 1453, the surface of the sample was abraded 150 times with a rubber ring wrapped with abrasive paper. Then, the surface of the flooring material sample was polished 80 times with a rubber ring from which abrasive paper was removed in the same manner as described above while dropping the above-mentioned contaminants on the surface of this worn and scratched sample. After stopping dropping, polishing was performed 20 times, and then the color difference (ΔE) was measured in the same manner as above. As a result, the color difference was as small as 4.3% as shown in Table 2 below.

Scratch resistance According to the JIS A 1453 abrasive paper method, the surface of the sample was abraded 150 times with a rubber ring wrapped with abrasive paper, and the depth of the scratch on the surface was measured by a laser surface shape measuring microscope (manufactured by KEYENCE CORPORATION). VF-7500). as a result,
The depth of scratches on the surface was as small as 7.1 μm as shown in Table 2 below.

Adhesion with Wax Wax (Sprint Pro manufactured by Johnson Co., Ltd.) was applied to the surface of the sample three times, and 1 mm square cuts were made in this wax layer. Then, an adhesive tape (cellophane tape manufactured by Nichiban Co., Ltd.) was adhered on the tape, and then the tape was peeled off, and the residual wax rate on the surface of the sample (the number of residual stitches relative to the total number of waxes cut in a grid pattern) Percentage). As a result, the wax residual ratio was 70% or more as shown in Table 2 below, and the amount of the peeled wax was small.

[Examples 2 to 4] The EV used in Example 1 was added to 50 parts by weight of the high-density polyethylene used in Example 1.
25 parts by weight of A (VA: 80%), 25 parts by weight of EVA (VA: 45%) used in Example 1, and 200 parts by weight of the calcium carbonate powder used in Example 1 were uniformly kneaded. , A powder and granules obtained by crushing this (particle size: 1.9
A floor material sample of Example 2 was prepared in the same manner as in Example 1 except that (mm or less) was used.

Further, the compounding amount of the high-density polyethylene used in Example 1 was changed from 50 parts by weight to 60 parts by weight, and the compounding amount of EVA (VA: 80%) used in Example 1 was 50 parts by weight. From Example 1 to 40 parts by weight
A sample of the flooring material of Example 3 was prepared in the same manner as in.

Furthermore, the EVA (VA: used in Example 1) was added to 50 parts by weight of the high-density polyethylene used in Example 1.
80%) and vinyl acetate content is 28% by weight.
25 parts by weight of ethylene-vinyl acetate copolymer [MFR: 15, hereinafter referred to as EVA (VA: 28%)], and the calcium carbonate powder used in Example 1 were uniformly kneaded at a ratio of 200 parts by weight. A flooring material sample of Example 4 was prepared in the same manner as in Example 1 except that powder and granules (particle size: 1.9 mm or less) obtained by crushing this were used.

Then, for the samples of Examples 2 to 4, in the same manner as in Example 1, the degree of improvement of the surface gloss by the polisher, the degree of recovery of the surface gloss by the polisher after scratching the surface, and the stain resistance. The properties (discoloration), scratch resistance, and adhesion with wax were examined. The results are shown in Tables 1 and 2 below.

Comparative Examples 1 to 4 50 parts by weight of polypropylene (FM801 manufactured by Tokuyama Soda Co., Ltd.) was added with 50 parts by weight of EVA (VA: 28%) used in Example 4 in Example 1. The calcium carbonate powder was uniformly kneaded at a ratio of 200 parts by weight, and pulverized to obtain a powder (particle size: 1.9).
mm or less) was obtained. Then, in the same manner as in Example 1, a sheet (thickness: 1 mm) to be the back surface layer was prepared, and the above-mentioned powder and granules were laminated on this sheet and heated at 200 ° C. for 50 k.
A flooring material sample of Comparative Example 1 in which a flooring material body having a thickness of 2.5 mm was integrally formed by pressing at g / cm ² was prepared.

In addition, EVA used in Example 1 (VA:
80%), EVA (VA: 45%) was mixed in an amount of 50 parts by weight to form a granular material, and a flooring material sample of Comparative Example 2 was prepared in the same manner as in Example 1.

Furthermore, the amount of polyethylene in Example 1 was changed from 50 parts by weight to 20 parts by weight, and the EVA of Example 1 was changed.
A flooring material sample of Comparative Example 3 was prepared in the same manner as in Example 1 except that the powder amount was changed from 50 parts by weight (VA: 80%) to 80 parts by weight.

Furthermore, the amount of polyethylene of Example 1 was changed from 50 parts by weight to 80 parts by weight, and the EVA of Example 1 was changed.
A flooring material sample of Comparative Example 4 was prepared in the same manner as in Example 1 except that the powder amount was changed from 50 parts by weight (VA: 80%) to 20 parts by weight.

With respect to the samples of flooring materials of Comparative Examples 1 to 4, in the same manner as in Example 1, the degree of improvement of the surface gloss by the polisher and the degree of recovery of the surface gloss by the polisher after scratching the surface. , Stain resistance (discoloration degree), scratch resistance, and adhesion to wax were examined. The results are shown in Tables 1 and 2 below.

[0074]

[Table 1]

[0075]

[Table 2]

Looking at Table 1, polyethylene and EVA
Floor material samples of Examples 1 and 3 in which (VA: 80%) is the component resin of the floor material main body, and polyethylene and EVA
(VA: 80%) and EVA (VA: 45%) are the flooring material samples of Example 2 which are the component resins of the flooring material body, and polyethylene, EVA (VA: 80%) and EVA (VA: 2).
8%) was used as the component resin of the flooring material body, the flooring material samples of Example 2 all had an initial surface gloss in the range of 14 to 16%, and polypropylene and EVA (VA: 28%) were used as the flooring material. The initial surface gloss of the flooring material sample of Comparative Example 1 used as the component resin of the main body is 16%, which is almost the same.

However, when the first dry buffing was performed with the polisher, the surface glossiness of the sample of Comparative Example 1 was 14%.
%, The surface glossiness of the samples of Examples 1 to 4 increases to 22 to 27%. And, the flooring material samples of Comparative Example 1 only increase the surface glossiness to 23% even after the second and third dry buffing, whereas the flooring material samples of Examples 1 to 4 When the second and third dry buffs are performed, the surface glossiness is 33 to
Significant increase to 37%. Further, when the wet buffing is performed, the surface glossiness of the flooring material sample of Comparative Example 1 is reduced to 21%, whereas the surface glossiness of the flooring material samples of Examples 1 to 4 is further increased to 46 to 54%. Becomes

From this fact, polyethylene was used instead of polypropylene, and the vinyl acetate content was 8% instead of EVA (VA: 28%) having a low vinyl acetate content.
Samples of Examples 1 and 3 using EVA (VA: 80%) as high as 0% by weight, EVA (VA: 45%) having a medium vinyl acetate content and EVA (V having a low content).
It is understood that the samples of Examples 2 and 4 in which (A: 28%) is used in combination with EVA (VA: 80%) have a remarkable effect of improving the surface gloss when dry buffing or wet buffing is performed with a polisher.

If the surface is scratched with a hard pad,
The surface glossiness of the sample of Comparative Example 1 is significantly reduced to 4%, whereas the surface glossiness of the samples of Examples 1 to 4 is only reduced to 7 to 9%. It can be seen that the floor material samples of ~ 4 are less likely to be damaged than the floor material sample of Comparative Example 1.

When the dry buffing was repeated three times with a polisher after the scratches were made as described above, the surface glossiness of both the samples of Comparative Example 1 and Examples 1 to 4 was recovered, but the floor of Comparative Example 1 was restored. The recovered material surface gloss is as low as 22%, whereas the floor material samples of Examples 1 to 4 have recovered surface gloss as high as 32 to 35%. Further wet buffing reduces the surface glossiness to 18% in the flooring material sample of Comparative Example 1, whereas Examples 1 to 4
In the flooring material sample of No. 3, the surface glossiness was further recovered and 43 to 5
2%.

From the above, the samples of Examples 1 and 3 using EVA (VA: 80%) having a high vinyl acetate content in addition to using polyethylene instead of polypropylene, and a medium vinyl acetate content EVA (V
(A: 45%) and EVA (VA: 28%) having a low content rate are used in combination with EVA (VA: 80%), the samples of Examples 2 and 4 are dry buffed or dry buffed with a polisher even if the surface is scratched. It can be seen that the effect of recovering the surface gloss is remarkable.

Next, referring to Table 2, the discoloration degree (color difference) due to the contaminated liquid when the surface is not abraded is 11.9% in the sample of Comparative Example 1, whereas the samples of Examples 1 to 4 are Is as small as 2.1 to 4.8%. And
The degree of discoloration due to the contaminated liquid when the surface is worn is also shown in Comparative Example
The sample No. 1 has a large value of 17.3%, while the samples of Examples 1 to 4 have a small value of 3.9 to 8.4%. Based on this, EVA (V
It can be seen that the samples of Examples 1 to 4 in which A: 80%) or EVA (VA: 45%) or EVA (VA: 28%) were used in combination also had significantly improved stain resistance.

Regarding the scratch resistance, the floor material samples of Examples 1 to 4 had a small scratch depth of 6.8 to 10.2 μm, whereas the floor material sample of Comparative Example 1 had a scratch depth. Is 1
It is as large as 2.0 μm, which shows that the samples of Examples 1 to 4 also have improved scratch resistance.

Regarding the adhesion to the wax, the sample of Comparative Example 1 has a wax residual rate of 0%, while the sample of Example 1 has a residual ratio of 70% or more, and the samples of Examples 2 to 4 have 50%. % Or more. From this, it is understood that when polyethylene is used instead of polypropylene and EVA having a high vinyl acetate content is blended, the adhesion to the wax is significantly improved.

The samples of Examples 2 to 4 were prepared by mixing 10 parts by weight of rosin in the layer of the flooring material body, and the adhesion with wax was examined. In all cases, the wax residual rate was 70% or more. It was confirmed that the adhesion with wax can be sufficiently enhanced by the addition of rosin.

Next, EVA with a medium vinyl acetate content was used.
The sample of Comparative Example 2 in which (VA: 45%) was alone mixed with polyethylene was EVA (VA: 45%) and EVA.
(VA: 80%) in combination with the sample of Example 2 and E
Compared with the samples of Examples 1 and 3 in which VA (VA: 80%) was blended alone, the degree of improvement in surface gloss and stain resistance,
The scratch resistance is slightly inferior, and particularly the adhesion with wax is significantly reduced. From this, it is understood that even if EVA (VA: 45%) having a medium vinyl acetate content is blended into polyethylene alone, the same effect as that of the present invention cannot be obtained.

Further, although the flooring material sample of Comparative Example 3 in which the blending amount of polyethylene is less than 30 parts by weight and the blending amount of EVA (VA: 80%) is more than 70 parts by weight, the adhesion to wax is excellent. The improvement of the surface gloss and the recovery of the surface gloss are worse than those of the samples of Examples 1, 3 and 4, and the stain resistance is also worse than that of the samples of Examples 1 to 4. In contrast,
The content of polyethylene is more than 70 parts by weight EVA (V
Comparative Example 4 in which the compounding amount of A: 80%) is less than 30 parts by weight.
The sample of No. 3 has good surface gloss, recovery of surface gloss, stain resistance, scratch resistance, etc., but its adhesion to wax is extremely poor. Therefore, it is understood that the samples of Comparative Examples 3 and 4 are inferior to the samples of Examples 1 to 4 in overall performance as a floor material.

[0088]

As is apparent from the above description, the flooring material of the present invention has various physical properties such as improvement of surface gloss by polishing, recovery of surface gloss, stain resistance, scratch resistance, and adhesion with wax. It has a remarkable effect that it can be improved comprehensively and the maintainability by the polisher can be greatly improved.

The composition containing rosin can further improve the adhesion to the wax, and the composition combining rosin on the back surface layer by laminating the back surface layer can improve the adhesion to the floor. What has a fiber layer, such as a gauze cloth, laminated on the bottom surface has the effect of further improving the adhesiveness.

[Brief description of drawings]

FIG. 1 is a perspective view showing a flooring material according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the same flooring material.

[Explanation of symbols] 1 Floor material body 2 Back layer 3 fiber layers

─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. ⁷ Identification Code FI B32B 27/32 B32B 27/32 Z C08J 5/00 CER C08J 5/00 CER C08L 31/04 C08L 31/04 E04F 15/10 103 E04F 15/10 103A // (C08L 23/06 C08L 31:04 31:04 93:04 93:04) (72) Inventor Katsuichi Hirata 2-3-3 Azuchicho, Chuo-ku, Osaka City Takiron Co., Ltd. (56) References JP-A-9-317142 (JP, A) JP-A-61-106646 (JP, A) JP-A-53-101039 (JP, A) JP-A-60-133038 (JP, A) Pp. 58-142923 (JP, A) JP-A-4-348166 (JP, A) JP-A 63-146950 (JP, A) JP-A-7-125145 (JP, A) (58) Fields investigated ( Int.Cl. ⁷ , DB name) C08L 23/06 C08L 31/04 B32B 27/00 E04F 15 / Ten

Claims (8)

(57) [Claims] 1. 30 to 70 parts by weight of polyethylene, 70 to 30 parts by weight of ethylene-vinyl acetate copolymer having a vinyl acetate content of 71 to 90% by weight, and 50 to 50 parts of an inorganic filler.
A flooring material that is compounded at a ratio of 300 parts by weight. 2. An ethylene-vinyl acetate copolymer having a vinyl acetate content of 71 to 90% by weight and a vinyl acetate content of 1 to 30 to 70 parts by weight of polyethylene.
35% by weight of ethylene-vinyl acetate copolymer
~ 15 parts by weight, a flooring material comprising an inorganic filler in a proportion of 50 to 300 parts by weight. 3. The flooring material according to claim 1, wherein the polyethylene is high-density polyethylene. 4. The flooring material according to claim 1, further comprising 1 to 15 parts by weight of rosin. 5. The flooring material according to any one of claims 1 to 4, wherein a fiber layer such as a gauze cloth is laminated on the back surface. 6. A back surface layer obtained by mixing 30 to 70 parts by weight of polyolefin with 70 to 30 parts by weight of an ethylene-vinyl acetate copolymer and 50 to 300 parts by weight of an inorganic filler is laminated on the back surface. The flooring material according to any one of claims 1 to 4. 7. The flooring material according to claim 6, further comprising 1 to 15 parts by weight of rosin in the back surface layer. 8. The flooring material according to claim 6 or 7, wherein a fiber layer such as ginseng is laminated on the bottom surface of the back surface layer.