JPH09317142A - Flooring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flooring capable of generally improving various properties such as the promotion and restoration of the luster by means of a polisher, dirt reistance, damage resistance, adhesion to wax, flexibility, etc., and greatly increasing maintenance efficiency by the polisher. SOLUTION: An inorganic filler of 50-300 pts.wt. is mixed with a mixed resin of polyethylene 30-70 pts.wt. and an ethylene-vinyl acetate copolymer (vinyl acetate content rate: 15-70wt.%) of 70-30 pts.wt. to form a flooring. If desirable, rosin is compounded, a ground layer 2 having a specific composition is laminated on the rear of a flooring main body 1, and fiber layer such as cheese cloth is laminated on the rear thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor material excellent in maintainability, which uses a mixed resin of polyethylene and an ethylene-vinyl acetate copolymer as a base resin.

[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 toxic hydrogen chloride gas during a fire, which adversely affects the human body and hinders evacuation behavior and fire fighting activities. Further, since it contains a large amount of plasticizer, there is a problem that the odor is strong.

Therefore, the present inventors have paid attention to halogen-free polypropylene, and have examined polypropylene and ethylene-
A floor material made by mixing calcium carbonate and the like with a resin mixed with a vinyl acetate copolymer has been proposed (Japanese Patent Application No. 5-296154).
issue).

Since this floor material uses a mixed resin of polypropylene and an ethylene-vinyl acetate copolymer as a resin component, it does not have the brittleness found in the polypropylene floor materials up to that time and is resistant to stains. It also had the advantage of improving the adhesiveness and adhesiveness.

[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 are not so good. There is a problem that it is easily soiled and easily scratched, and if the surface gloss decreases due to the scratches, there is a problem that the surface gloss is not sufficiently recovered even by polishing with a polisher. In addition, since the adhesiveness to wax is poor, there is a problem that the floor material is easily peeled off even when wax or the like is applied, and it is hard to say that the polisher has good maintainability.

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

[0007]

In order to achieve the above object, a flooring material according to claim 1 of the present invention comprises 30 to 70 parts by weight of polyethylene and 70 to 30 parts by weight of ethylene-vinyl acetate copolymer ( Vinyl acetate content: 15-70% by weight)
50 to 300 parts by weight of the inorganic filler are mixed with the mixed resin of.

The flooring material of claim 2 is characterized in that high-density polyethylene is used as polyethylene.
The flooring material of claim 3 is characterized by further mixing 1 to 15 parts by weight of rosin, and the flooring material of claim 4 is characterized by laminating a fiber layer such as ginseng on the back surface. The flooring material is 1 part by weight of an ethylene-vinyl acetate copolymer or 100 parts by weight of a mixed resin of the polymer and another olefin resin.
-15 parts by weight of rosin and 50-300 parts by weight of an inorganic filler are mixed to form a base layer on the back surface. It is characterized by laminating fiber layers.

As described above, a mixed resin of 30 to 70 parts by weight of polyethylene and 70 to 30 parts by weight of ethylene-vinyl acetate copolymer (vinyl acetate content: 15 to 70% by weight) is used as a base resin. The flooring material according to claim 1 of the present invention is substantially the same as the previously proposed flooring material (hereinafter, referred to as the previous flooring material) which uses a mixed resin of polypropylene and an ethylene-vinyl acetate copolymer as a base resin. Has an initial surface gloss.

However, when the surface is polished with a polisher (buff machine), the surface gloss of the above floor material is not so improved, as can be seen from the experimental data described later.
The surface luster of the floor material is remarkably improved. 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 the floor material of claim 1 is restored, but the floor material of the previous floor material is recovered. While the gloss is not so good, the floor covering of claim 1 has a very good surface gloss after recovery. Moreover, as can be seen from the experimental data described below, the flooring material of claim 1 has far better stain resistance, scratch resistance, and adhesion to wax as compared with the previous flooring material. Therefore, the flooring material according to the first aspect of the present invention has a significantly improved maintainability by the polisher as compared with the previous flooring material.

As described above, the physical properties of the flooring material according to claim 1 are improved and the maintainability is greatly improved because the side chain (-
It is considered that polyethylene having a linear molecular structure with a small number of side chains is blended in place of polypropylene having CH ₃ ) and that the compatibility between polyethylene and ethylene-vinyl acetate copolymer is good. When the blending amount of polyethylene is less than 30 parts by weight and the blending amount of ethylene-vinyl acetate copolymer is more than 70 parts by weight, the adhesion with the wax is improved, but the surface gloss is lowered and the stain resistance and The scratch resistance is also reduced. On the other hand, when the blending amount of polyethylene is more than 70 parts by weight and the blending amount of ethylene-vinyl acetate is less than 30 parts by weight, surface gloss and stain resistance are improved, but scratch resistance is slightly deteriorated and wax and Adhesion is significantly reduced. In addition, since it has poor flexibility, it is easily cracked.

As the ethylene-vinyl acetate copolymer, it is necessary to use one having a vinyl acetate content of 15 to 70% by weight, and an ethylene-vinyl acetate copolymer having a vinyl acetate content of less than 15% by weight. When used, the adhesiveness with the wax, the flexibility, etc. are deteriorated. On the other hand, when an ethylene-vinyl acetate copolymer having a vinyl acetate content of more than 70% by weight is used, abrasion resistance and flexibility are deteriorated. Further, the amount of the inorganic filler compounded is 50 to 300 parts by weight as described above, and if it is more than this amount, the floor material becomes brittle, and if it is less than the above amount, the flame retardancy of the floor material decreases.

As the polyethylene, high-density polyethylene having a small number of branched molecules is suitable, and the flooring material of claim 2 using such high-density polyethylene has the above physical properties more than those of the flooring material using low-density polyethylene. The improvement effect of is remarkable.

Further, when 1 to 15 parts by weight of rosin is further mixed as in the flooring material of claim 3, the adhesion to the wax is further improved, and a cold gauze layer is laminated on the back surface as in the flooring material of claim 4. Then, the adhesion to the floor and ground is improved. And
When a backing layer having a specific composition containing rosin is laminated on the back surface as in the flooring material of claim 5, the adhesion to the floor and ground is further improved, and as with the flooring material of the claim 6, a ginseng or the like is placed on the backing surface of the backing layer. By laminating the fiber layers of, the adhesiveness is further improved.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described 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.
It is formed in the shape of a square tile, and the underlayer 2 is laminated on the back surface of the flooring body 1. This underlayer 2
May be omitted.

The flooring body 1 is made of a mixed resin of 30 to 70 parts by weight of polyethylene and 70 to 30 parts by weight of ethylene-vinyl acetate copolymer (vinyl acetate content: 15 to 70% by weight). ˜300 parts by weight of inorganic filler is mixed, and the thickness thereof 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 produced by high pressure method (specific gravity: 0.9
2) can of course be used.

Ethylene-vinyl acetate copolymer (hereinafter referred to as E
VA), vinyl acetate is 15 to 70% by weight.
The included one is used. When EVA having a vinyl acetate content of less than 15% by weight is used, the adhesion of the flooring body 1 to the wax, flexibility, etc. are reduced, and when EVA having a content of more than 70% by weight is used, the flooring material The wear resistance and flexibility of the main body 1 are slightly reduced.

In the tiled flooring material like this embodiment, it is desirable to use EVA having a vinyl acetate content of about 15 to 40% by weight. When such EVA is used, surface gloss is obtained by polishing with a polisher. It is possible to obtain a flooring material in which the On the other hand, in the case of a long floor material, it is desirable to use EVA having a vinyl acetate content of about 40 to 70% by weight. When such an EVA is used, a surface that is flexible and easy to wind is used. A long floor material with good gloss can be obtained.

As the inorganic filler, various conventionally known fillers can be used. Among them, 10 μm can be used.
Powders of calcium carbonate having the following average particle diameters and mixed powders of this calcium carbonate powder and aluminum hydroxide powder are preferably used. Although flame retardancy can be imparted only by filling calcium carbonate powder, filling a mixed powder of calcium carbonate powder and aluminum hydroxide powder causes aluminum hydroxide to release water during thermal decomposition, resulting in flame retardancy. It is possible to obtain a non-combustible or non-combustible flooring material.

The blending amount of the above-mentioned polyethylene and EVA is
Polyethylene 30-70 parts by weight, EVA 70-30
It is necessary to make it a weight part. The amount of polyethylene is less than 30 parts by weight, and the amount of EVA is 7
When the amount is more than 0 parts by weight, the adhesion between the flooring material and the wax is improved, but the surface gloss is lowered, and the stain resistance and the scratch resistance are also lowered. On the other hand, when the amount of polyethylene is more than 70 parts by weight and the amount of EVA is less than 30 parts by weight, the surface gloss and stain resistance of the flooring material are improved, but the scratch resistance is slightly deteriorated and wax is not used. The adhesiveness of is greatly reduced. Also, since the flexibility becomes poor, it becomes easy to crack.

The content of the inorganic filler is in the range of 50 to 300 parts by weight with respect to 100 parts by weight of the mixed resin of polyethylene and EVA. If it is made to be small and compounded in a small amount, the flame retardancy of the flooring material main body 1 decreases.

In order to further improve the adhesion with the wax, it is desirable to blend rosin in the flooring material body 1. The amount of rosin is 1 to 1 with respect to 100 parts by weight of the mixed resin.
It is in the range of 5 parts by weight, and if it is added in a larger amount, the hue of the flooring body 1 may become unstable, and if it is added in a small amount, it becomes difficult to remarkably improve the adhesion with the wax. Further, since this rosin also has the function of enhancing the adhesiveness as described later, if the rosin is blended in the flooring material main body 1 as described above, the adhesiveness to the floor / ground surface will be improved even if the underlayer 2 is not provided. improves.

If desired, the flooring body 1 may include a pigment, a peroxide crosslinking agent, a coupling agent, a lubricant such as bisamide, a phenolic antioxidant, a hindered amine light stabilizer, and the like. A small amount of various additives may be contained.

Base layer 2 laminated on the back surface of the flooring body 1
Is 100 parts by weight of an ethylene-vinyl acetate copolymer or a mixed resin of the polymer and another olefin resin.
-15 parts by weight of rosin and 50-300 parts by weight of inorganic filler are mixed, and the thickness thereof is 0.5-5 mm.
The degree is not particularly limited.

Polyethylene, polypropylene or the like is used as the olefin resin of the underlayer 2, and EVA, which is relatively soft and contains 35 to 70% by weight of vinyl acetate, is preferably used. Further, the same inorganic fillers as described above are used.

When the underlayer 2 having the above-mentioned composition is laminated, the underlayer 2 is relatively flexible and has cushioning properties, so that the flooring material main body 1 can be backed up to provide a good tread feeling. Moreover, since the rosin contained in the underlayer 2 is highly compatible with EVA and has excellent adhesiveness with the inorganic filler, the inorganic filler is firmly held in the underlayer 2 and the brittleness of the underlayer 2 is reduced. It has the function of suppressing adhesiveness and improving the adhesive strength (peeling resistance) with the floor. Therefore, it becomes possible to firmly bond the floor to the ground using a commercially available floor adhesive. The rosin content is 1 as above.
It is about 15 parts by weight, and if it is mixed in a larger amount, the underlayer 2
The tensile strength may be decreased, and if it is compounded in a small amount, it becomes difficult to significantly improve the adhesiveness.

Furthermore, it is preferable to laminate a fiber layer (not shown) such as a gauze cloth in a semi-embedded state on the back surface of the base layer 2 because the adhesion to the floor and ground can be further improved. Also,
When the backing layer 2 is not provided on the back surface of the flooring material body 1, a fiber layer such as ginseng may be directly laminated on the back surface of the flooring material body 1, and in that case, the adhesiveness is improved.

Needless to say, a small amount of the above-mentioned additives may be added to the underlayer 2 if necessary.

Such a tiled floor material having a two-layer structure composed of the floor material main body 1 and the base layer 2 can be manufactured, for example, by the following method.

First, 30 to 70 parts by weight of polyethylene, 70 to 30 parts by weight of EVA, 50 to 300 parts by weight of inorganic filler, and optionally 1 to 15 parts by weight of rosin and a small amount of additives. And are mixed and granulated with an extruder to prepare a powder or granular material for molding a flooring material main body.

On the other hand, 1 to 15 parts by weight of rosin and 100 parts by weight of a mixed resin of EVA and an olefin resin and, if necessary, a small amount of additives are added and sheeted by an extruder to form a base layer sheet. Build.

Then, on this sheet, a powder for molding a flooring material main body is laminated, heated, and pressed by a pressure roll or the like to integrally form a layer of the flooring material main body, and then, to a predetermined size. The tiled flooring is manufactured by cutting into pieces.

In this flooring material, polyethylene was used in place of polypropylene, and the composition of the flooring material main body 1 was set to the specific composition described above. The surface gloss is significantly improved as shown in the experimental data described later. Moreover, stain resistance,
It has good scratch resistance and adhesion to wax, and even if the surface is scratched and the surface gloss is reduced, polishing the surface with a polisher remarkably restores the surface gloss. Therefore, this floor material has extremely good maintainability by a polisher.

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

[Example 1] High-density polyethylene (HDPE2300 manufactured by Tosoh Corporation, MFR: 7, density: 0.
951) 50 parts by weight, vinyl acetate content 28% by weight
50 parts by weight of EVA (MFR: 15) with an average particle size of 3
Calcium carbonate powder of 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. Stack this powder on the belt and
By heating at 0 ° C. and pressing at 10 kg / cm ² , a floor material sample having a single layer structure and having a thickness of 2.5 mm was prepared.

With respect to this flooring material sample, the degree of improvement in 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, adhesion to wax The sex and flexibility were examined as follows.

Degree of Improvement of Surface Gloss by Polisher The above floor material sample was attached onto a plastic substrate via a hard board made of paper, and a gloss meter (Suga Test Instruments Co., Ltd.) was used.
HG-246) manufactured by K.K., and the initial surface glossiness of this flooring material sample was measured based on the test method of JIS K 7105. The result is 1 as shown in Table 1 below.
It was 6%.

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 flooring material sample was buffed (driaf) by rotating for 0 sec / m ² . Then, the surface glossiness of the flooring sample after buffing was measured by the same method as above using a gloss meter, and as shown in Table 1 below, it increased to 27%. Similarly, when the second dry fluff operation and the measurement of the surface glossiness and the third dry fluff operation and the measurement of the surface glossiness were repeated, as shown in Table 1 below, after the second dry fluff operation, The surface glossiness was 39% and the surface glossiness after the third dry roof was 45%, and the surface glossiness was remarkably improved.

Further, a small amount of water was sprinkled on the surface of the floor material sample, and the surface of the floor material sample was buffed (wet buff) in the same manner as above, and then the surface glossiness was measured. as a result,
The surface gloss is further improved, and as shown in Table 1 below, 53
%Met.

Degree of Recovery of Surface Gloss by Polisher After Scratching the Surface Instead of the above soft pad, a hard pad (Sumitomo 3M's green pad) was attached to the polisher,
The surface of the floor material 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 gloss decreased to 8% as shown in Table 1 below.

Next, the hard pad was replaced with the soft pad again, and the dry roof operation and the measurement of the surface gloss were repeated three times to examine the degree of recovery of the surface gloss of the floor material sample. As a result, as shown in Table 1 below, the surface glossiness after the first buff is 23%, the surface glossiness after the second buff is 34%, and the surface glossiness after the third buff. Was 38% 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 carried out to measure the surface glossiness of the floor material sample. as a result,
The surface glossiness was 51% as shown in Table 1 below, and it was found that even in the case of a wet buff, the surface glossiness was restored to a level close to that before the surface was scratched.

Stain resistance (discoloration degree) With respect to the flooring material sample, the stain resistance in the case of not being worn and not scratched and the stain resistance in the case of being worn and scratched were
The investigation was performed as follows.

[Stain resistance when not scratched without abrasion] While dropping standard contaminants according to JIS L 1023 on the surface of the floor material sample, JIS A 145
According to the method of 3, the surface of the flooring material sample was polished 80 times with a rubber ring on which no abrasive paper was wrapped, and further, the removal of contaminants was stopped and the rubber ring was ground 20 times. And J
The color difference (ΔE) between the soiled flooring sample and the original flooring sample without soiling was determined by IS K 7105 color difference measurement method. As a result, the color difference was 5.7% as shown in Table 2 below.

[Stain resistance when worn and scratched] J
Based on the method of IS A 1453, the surface of the flooring sample was worn 150 times with a rubber ring wrapped with abrasive paper.
Then, while dropping the above contaminants on the surface of the worn and scratched flooring material sample, 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 above.
Further, the removal of contaminants was stopped, and 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 11.1% as shown in Table 2 below.

Scratch resistance The surface of the floor material sample was polished 150 times with a rubber ring wrapped with abrasive paper according to the JIS A 1453 abrasive paper method, and the depth of the scratch on the surface was measured by a laser surface shape measuring microscope (Keyence Corporation). Manufactured by VF-7500).
As a result, the depth of scratches on the surface was 4.8 μm as shown in Table 2 below.

Adhesion with Wax Wax (Sprint Pro manufactured by Johnson Co., Ltd.) was applied three times to the surface of the flooring material sample, and 1 m was applied to this wax layer.
m square cuts were made. Then, an adhesive tape (cellophane tape manufactured by Nichiban Co., Ltd.) was pasted on the tape, and the tape was peeled off, and the residual wax rate on the floor material sample surface (remaining number of residual wax with respect to the total number of waxes cut in a grid pattern) Number percentage). As a result, the residual wax rate was 5% or less as shown in Table 2 below.

Flexibility A floor material sample was cut into a strip having a width of 5 cm and a length of 25 cm to prepare a large number of test pieces. Then, the operation of winding the test piece around a plurality of pipes having different diameters is repeated three times, and the pipe having the smallest diameter which does not cause cracks in the test piece is checked for all three times, and the pipe diameter is changed from large to small and the flexibility is good or bad. Judged. As a result, the minimum pipe diameter at which the test piece does not crack is 2 as shown in Table 2 below.
It was 0 mm.

[Examples 2 to 4] Instead of the EVA having a vinyl acetate content of 28% by weight used in Example 1, Example 2 was used.
Then EVA (MFR: 45% by weight vinyl acetate content)
2.5) and EVA (MFR: 15) having a vinyl acetate content of 60% by weight in Example 3, respectively, except that the same procedures as in Example 1 were carried out. 3 floor material samples were prepared.

Further, except that the amount of polyethylene used in Example 1 was changed from 50 parts by weight to 60 parts by weight, and the amount of EVA used in Example 1 was changed from 50 parts by weight to 40 parts by weight. Example 4 is the same as Example 1
The flooring material sample of was manufactured.

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

[Comparative Examples 1 to 3] 50 parts by weight of polypropylene (FM801 manufactured by Tokuyama Soda Co., Ltd.), 50 parts by weight of EVA (MFR: 15) having a vinyl acetate content of 28% by weight, and an average particle size of 3 μm of calcium carbonate powder was uniformly kneaded at a ratio of 200 parts by weight, and pulverized to 1.9 mm.
A granular material having the following particle size was obtained. The powder and granules were laminated on a belt, heated at 200 ° C., and pressed at 50 kg / cm ² to prepare a flooring material sample of Comparative Example 1 having a thickness of 2.5 mm.

A flooring material sample of Comparative Example 2 was prepared in the same manner as above except that EVA (MFR: 2.5) having a vinyl acetate content of 45% was used in place of the above EVA. , The content of vinyl acetate is 6 instead of EVA.
A flooring material sample of Comparative Example 3 was prepared in the same manner as above except that 0% EVA (MFR: 15) was used.

With respect to the floor material samples of Comparative Examples 1 to 3, 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. Sex (discoloration),
The scratch resistance, the adhesion with wax, and the flexibility were examined.
The results are shown in Tables 1 and 2 below.

Comparative Examples 4 and 5 The amount of polyethylene used in Example 1 was changed from 50 parts by weight to 20 parts by weight, and the amount of EVA used in Example 1 was changed from 50 parts by weight to 80 parts by weight. A flooring material sample of Comparative Example 4 was produced in the same manner as in Example 1 except that the parts were changed.

Further, except that the amount of polyethylene used in Example 1 was changed from 50 parts by weight to 80 parts by weight, and the amount of EVA used in Example 1 was changed from 50 parts by weight to 20 parts by weight. Is the same as Example 1 and Comparative Example 5
The flooring material sample of was manufactured.

With respect to the flooring material samples of Comparative Examples 4 and 5, the degree of improvement of the surface gloss by the polisher and the degree of the recovery of the surface gloss by the polisher after scratching the surface in the same manner as in Example 1, The stain resistance (discoloration), scratch resistance, adhesion to wax, and flexibility were examined. The results are shown in Tables 1 and 2 below.

[Table 1]

[Table 2]

Looking at Table 1, polyethylene and EVA
The initial surface glossiness of the flooring material samples of Examples 1 to 4 in which the mixed resin with is the base resin is 15 to 16%, and Comparative Examples 1 to 1 in which the mixed resin of polypropylene and EVA is the base resin No. 3 flooring sample initial surface gloss (16-17
%) Is almost the same.

However, when the first dry buffing is performed with a polisher, the surface glossiness of the floor material samples of Comparative Examples 1 to 3 is slightly reduced to 12 to 14%, while that of Example 1 to
In the flooring sample of No. 4, the surface glossiness increases to 22 to 27%. And, the floor material samples of Comparative Examples 1 to 3 have a surface glossiness of 2 even after the second and third dry buffs.
While only increasing to 1-24%, Example 1
Floor material samples of ~ 4 show a significant increase in surface gloss to 30-55% after the second and third dry buffs. When wet buffing is further performed, the surface glossiness of the floor material samples of Comparative Examples 1 to 3 decreases to 13 to 21%, whereas the surface glossiness of the floor material samples of Examples 1 to 4 further increases. ~ 61%.

From this, the floor material samples of Examples 1 to 4 in which polyethylene was used instead of polypropylene were:
It can be seen that the effect of improving the surface gloss in the case of dry buffing or wet buffing with a polisher is remarkable.

If a hard pad is used to scratch the surface,
The floor material samples of Comparative Examples 1 to 3 have a surface gloss of 4 to 5%.
In contrast to the comparative example 1, the floor material samples of Examples 1 to 4 only have a surface gloss reduction of 8 to 10%. It can be seen that scratches are less likely to occur than the floor material samples of ~ 3.

Then, after making the scratches as described above and repeating the dry buff three times with a polisher, Comparative Examples 1 to 3
The surface glossiness of both the flooring material samples of Examples 1 to 4 and the samples of Examples 1 to 4 are recovered, but the recovered surface glossiness of the flooring material samples of Comparative Examples 1 to 3 is as low as 22 to 30%, while that of Example 1
~ 4 floor material samples have a recovered surface gloss of 26-4
It will be as high as 3%. Further wet buffing, Comparative Example 1
In the floor material samples of Nos. 3 to 3, the surface gloss value decreases to 16 to 19%, whereas in the floor material samples of Examples 1 to 4, the surface gloss value further recovers to 42 to 54%.

From this, the floor material samples of Examples 1 to 4 in which polyethylene was used instead of polypropylene were
Even if the surface is scratched, it can be seen that the effect of recovering the surface gloss is remarkable if dry buffing or wet buffing is performed with a polisher.

Next, referring to Table 2, although the discoloration degree (color difference) due to the contaminated liquid when the surface is not worn is 8.3 to 14.0% in the floor material samples of Comparative Examples 1 to 3. On the other hand, the floor material samples of Examples 1 to 4 have a small value of 2.9 to 5.7%. The degree of discoloration due to the contaminated liquid when the surface was worn was 17.
The floor material samples of Examples 1 to 4 are as small as 6.9 to 11.6%, while they are as large as 3 to 24.3%. From this, it is understood that the flooring material samples of Examples 1 to 4 in which polyethylene is used instead of polypropylene also have a significantly improved stain resistance.

Regarding the scratch resistance, the floor material samples of Examples 1 to 4 had small scratch depths of 4.2 to 6.4 μm, whereas the floor material samples of Comparative Examples 1 to 3 did not. Depth 1
It is as large as 2.0 to 22.3 μm, which shows that the flooring material samples of Examples 1 to 4 in which polyethylene is used instead of polypropylene also have a significantly improved scratch resistance.

Regarding the adhesion to wax, the floor material samples of Comparative Examples 1 and 2 had a wax residual rate of 0%, and the floor material sample of Comparative Example 3 had 30% or less, while Example 1 5% or less, the flooring material sample of Example 2 is 10% or less, the flooring material sample of Example 3 is 50% or more, and the flooring material sample of Example 4 containing a large amount of polyethylene is 0%. %. From this, when polyethylene is used instead of polypropylene, the adhesion with the wax is improved, and as the vinyl acetate content of EVA is higher, the adhesion with the wax is better, and when the blending amount of polyethylene is increased, the adhesion is improved. It turns out that it gets worse.

A flooring material sample was prepared by mixing 10 parts by weight of rosin with the flooring material samples of Examples 1 and 4, and the adhesion with wax was examined. The wax residual ratio was 30% or less, respectively. It was 20% or less, and it was confirmed that the adhesiveness with the wax can be sufficiently enhanced by blending rosin.

Regarding the flexibility, in the floor material samples of Examples 1 to 4 and the floor material samples of Comparative Examples 1 to 3, the minimum diameter of the pipe that does not cause cracking does not change so much and the flexibility is almost the same. It is understood that it has.

Next, the flooring material sample of Comparative Example 4 in which the content of polyethylene was less than 30 parts by weight and the content of EVA was more than 70 parts by weight had good flexibility and good adhesion to wax, The improvement in gloss and the recovery of surface gloss are worse than those of the floor material samples of Comparative Examples 1 to 3, and the stain resistance and scratch resistance are as poor as those of the floor material of Comparative Example 1. On the other hand, the flooring material sample of Comparative Example 5 containing more than 70 parts by weight of polyethylene and less than 30 parts by weight of EVA,
The surface gloss is improved, the surface gloss is recovered, and the stain resistance is good, but the flexibility is extremely poor, and the adhesion to the wax and the scratch resistance are also poor. Therefore, it is understood that the floor material samples of Comparative Examples 4 and 5 are inferior in overall performance as the floor material as compared with the floor material samples of Examples 1 to 4.

[0073]

As is apparent from the above description, the flooring material of the present invention is improved in surface gloss by a polisher, recovery of surface gloss, stain resistance, scratch resistance, adhesion to wax, flexibility and the like. The physical properties can be comprehensively improved, and the maintainability by the polisher can be significantly improved, which is a remarkable effect.

The composition containing rosin can further improve the adhesiveness with the wax, and the composition having a rosin-containing underlayer on the back surface can improve the adhesiveness. In addition, a product obtained by further laminating a fiber layer such as ginseng has the effect of further improving the adhesiveness.

[Brief description of drawings]

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

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

[Explanation of symbols]

 1 Floor material body 2 Underlayer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C08K 3/00 C08K 3/00 C08L 23/06 LCK C08L 23/06 LCK 31/04 LDJ 31/04 LDJ 93/04 LSK 93/04 LSK (72) Inventor Tadayuki Morikawa 2-3-13 Azuchi-cho, Chuo-ku, Osaka Takiron Co., Ltd.

Claims (6)

[Claims] 1. Polyethylene of 30-70 parts by weight and 70-
50 to 50 parts by weight of a mixed resin with 30 parts by weight of ethylene-vinyl acetate copolymer (vinyl acetate content: 15 to 70% by weight).
A flooring material made by mixing 300 parts by weight of an inorganic filler. 2. The flooring material according to claim 1, wherein the polyethylene is high-density polyethylene. 3. The flooring material according to claim 1, further comprising 1 to 15 parts by weight of rosin. 4. The flooring material according to any one of claims 1 to 3, wherein a fiber layer such as a gauze cloth is laminated on the back surface. 5. 1 to 15 parts by weight of rosin and 50 to 300 parts by weight of an inorganic filler are mixed with 100 parts by weight of an ethylene-vinyl acetate copolymer or a mixed resin of the polymer and another olefin resin. The flooring material according to any one of claims 1 to 3, wherein the underlayer formed by the above is laminated on the back surface. 6. The flooring material according to claim 5, wherein a fiber layer such as ginseng is laminated on the back surface of the underlayer.