JP2007255089A - Antifouling floor material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antifouling floor material which is formed of a thermoplastic resin, very easily and inexpensively producible as a floor material excellent in antifouling property without carrying out a polishing step etc., by using a filler having a mean particle size of 1 to 15 μm, and exhibits a closely packed surface by virtue of using the filler having the small mean particle size of 1 to 15 μm, to thereby exhibit excellent effect of wax in addition to the antifouling property, in spite of use of the wax only in a small amount. <P>SOLUTION: The antifouling floor material is formed of the thermoplastic resin and contains the filler which has the average particle size of 1 to 15 μm. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a flooring material made of a thermoplastic resin, and relates to an antifouling flooring material imparted with an antifouling property by using a filler having an average particle diameter of 1 to 15 μm.

  Conventionally, inorganic fillers such as calcium carbonate having an average particle diameter of 50 to 200 μm have been used for flooring materials made of thermoplastic resins such as polyvinyl chloride resin, polyethylene resin, and ethylene-vinyl copolymer resin. . In particular, in the composition tile, the relative proportion of the resin is small, while the relative proportion of the filler tends to be large, so that the surface is inevitably rough. The composition tiles were easily soiled due to the roughness of the surface, and were difficult to remove. It is thought to be caused by fine holes and irregularities generated on the surface of the filler.

Therefore, in order to solve the problem that dirt is likely to adhere due to the large surface roughness of the composition tile, the surface of the sheet for the composition vinyl floor tile rolled by the calendar is ground, polished, and buffed. The composition vinyl floor tile is characterized in that the center line average roughness (Ra) is 0.5 μm or less and the surface glossiness (60 °) is 30% or more. (Patent Document 1)

Further, when a transfer film having an appropriate surface roughness is placed on the surface of a plastic floor material on which a natural material pattern is formed, and the transfer film is transferred to the surface of the plastic floor material by hot pressing, the surface roughness of the transfer film is increased. Since the surface roughness of the plastic flooring is high, a plastic flooring excellent in antifouling property is provided that makes it difficult for dirt to adhere to the surface of the plastic flooring. (Patent Document 2)
Japanese Patent Laid-Open No. 2005-2692 No. 6-1210

  However, in the invention described in Patent Document 1, smoothness is imparted by sequentially applying the surface of the sheet for composition vinyl floor tiles to a grinding process, a polishing process, and a buffing process, so that the manufacturing process is complicated. It was. Further, in the above invention, since the grinding process, the polishing process, and the buffing process each require equipment, in addition to the increase in manufacturing equipment and cost, further improvement has been demanded.

  In addition, in the invention described in Patent Document 2, since the anti-fouling property is imparted by reducing the surface roughness by the transfer film, it is essential to provide the transfer film on the surface. In addition to problems in processability such as difficulty in transferring to the surface of the transfer film in the composition tile, a new technique that does not use the transfer film has been demanded from the viewpoint of freedom during processing.

  Accordingly, the present invention solves the above-mentioned problems, and the invention according to claim 1 is a flooring material comprising a thermoplastic resin and containing a filler, and the average particle diameter of the filler is 1 to 15 μm. The present invention provides an antifouling flooring characterized by the above. The antifouling floor material of the present invention is very easy by setting the particle size of the filler to 1 to 15 μm, without going through a polishing process or the like, or without requiring additional equipment for the process. In addition, a flooring excellent in antifouling property can be obtained at low cost. In particular, it is effective in a composition tile having a large filler content and difficult to impart antifouling properties. In addition, in this specification, a floor material shall mean a floor sheet and a floor tile.

In addition, since the average particle size of the filler of the antifouling floor material of the present invention is as small as 1 to 15 μm, the surface becomes dense, and when a wax is applied in addition to the antifouling function, a conventional thermoplastic resin Since the wax does not soak into the fine pores on the surface unlike the tile made of, the effect of the wax can be effectively exhibited even with a small amount of wax.

The invention described in claim 2 is characterized in that, in addition to the features described in claim 1, the filler contains any one or more of calcium carbonate, talc, clay, magnesium oxide, and magnesium hydroxide. An antifouling floor material is provided. The filler used in the antifouling flooring of the present invention may have an average particle diameter of 1 to 15 μm, and any known filler can be used. However, the processability when using a thermoplastic resin can be used. From the viewpoint, it is particularly preferable to include one or more of calcium carbonate, talc, clay, magnesium oxide, and magnesium hydroxide.

In addition to the features described in claim 1 or 2, the invention described in claim 3 is an antifouling flooring in which the thermoplastic resin is a polyvinyl chloride resin and / or an ethylene-vinyl acetate copolymer resin. It is to provide. Although a well-known thermoplastic resin can be used for the antifouling flooring of the present invention, vinyl chloride resin and / or ethylene-vinyl acetate copolymer resin are preferable from the viewpoint of processability.

The invention according to claim 4 is characterized in that, in addition to the features according to claim 1 or 2, the thermoplastic resin is any one of low density polyethylene resin, ethylene-vinyl acetate copolymer resin, polypropylene resin, and styrene-butadiene rubber. An antifouling flooring material comprising one or two or more is provided. A known thermoplastic resin can be used for the antifouling floor material of the present invention. From the viewpoint of processability and physical properties of the antifouling floor material of the present invention, the thermoplastic resin is a low-density polyethylene resin, ethylene. -It is preferable to contain any one or two or more of vinyl acetate copolymer resin, polypropylene resin, and styrene-butadiene rubber.

  According to the antifouling floor material of the present invention, the antifouling floor material of the present invention has a particle size of 1 to 15 μm so that it does not undergo a polishing process or the like or is provided for equipment for the above process. Even without the need for additional expansion, a flooring material having excellent antifouling properties can be obtained very easily and inexpensively. In particular, it is effective in a composition tile having a large filler content and difficult to impart antifouling properties.

In addition, since the average particle size of the filler of the antifouling floor material of the present invention is as small as 1 to 15 μm, the surface becomes dense, and when a wax is applied in addition to the antifouling function, a conventional thermoplastic resin Since the wax does not soak into the fine pores on the surface unlike the tile made of, the effect of the wax can be effectively exhibited even with a small amount of wax.

  Hereinafter, the antifouling flooring of the present invention will be described in detail. The antifouling floor material of the present invention is made of a thermoplastic resin and is a floor material containing a filler, wherein the average particle diameter of the filler is 1 to 15 μm. Generally, the flooring material is made of a thermoplastic resin, and a filler having an average particle diameter of 50 μm to 200 μm is used. The reason why such a filler having an average particle diameter is used is that the material for producing the heated and kneaded flooring material is rolled with a mixing roll and a calender roll and molded into the flooring material. The adhesion is excellent. The adhesion of the material to the roll in such a molding process naturally affects the workability, but also greatly affects the surface state of the molded flooring. That is, if the adhesion of the material to the roll, especially the calendar roll, is insufficient, it becomes difficult to finish the surface state of the molded flooring material smoothly.

Therefore, conventionally, as means for keeping the surface state of the floor material smooth, the surface is polished by heat press treatment, rolled with a calender roll, or further, the content of the filler is reduced. The surface condition of the material has been made smooth. However, both were disadvantageous in terms of cost.

The antifouling floor material of the present invention can be obtained by using a filler having an average particle diameter of 1 to 15 μm, and a smooth and dense surface can be obtained even when rolled with a conventional mixing roll and a calender roll.

The antifouling floor material of the present invention uses a filler having an average particle diameter of 1 to 15 μm. The reason is that when a filler having an average particle diameter of less than 1 μm is used, the filler particles aggregate, so-called fouling occurs, and the filler is uniformly dispersed and mixed in the compounding material. This is because it becomes difficult. As a result, the strength of the flooring material is weakened, and problems such as cracking are likely to occur. In addition, the above-described filler material appears on the surface, and the surface condition may become poor. In addition, since the particles of the filler are fine, they are not mixed / dispersed in the compounding material during processing, and the ratio of scattering increases. From the viewpoint of ensuring the work environment and stable quality of the flooring Is also not preferred. Furthermore, when the particle size of the filler is less than 1 μm, it is difficult to uniformly disperse, and therefore, in the process of kneading and homogenizing the raw material, “burning” is likely to occur in the kneaded and uniform material in the kneader. . That is, discoloration due to heating, or the material adhering to the inside of the kneader is likely to burn quickly. This phenomenon is caused by the fact that the stabilizer added to prevent burning of the material adheres to the filler and is dispersed in the material. The stabilizer is also considered to be insufficiently dispersed in the material, and the material is easily burnt. On the other hand, when a filler having an average particle diameter exceeding 15 μm is used, it is difficult to obtain a dense surface state, and sufficient antifouling property cannot be obtained.

Since the antifouling floor material of the present invention can obtain a smooth and dense surface regardless of the content of the filler, the composition tile, that is, the resin content is less than 30%, Very effective for high tiles. The antifouling floor material of the present invention is excellent in antifouling property because a smooth and dense surface is obtained. In particular, the antifouling property of the antifouling floor material of the present invention is derived from the fineness of the surface, and the antifouling floor material of the present invention has, for example, a composition containing as much filler as a composition tile. Even if it is a material of a composition, since it has the outstanding antifouling property, simple maintenance or the frequency of maintenance can be reduced.

In addition, the antifouling floor material of the present invention can provide a dense surface even with a composition tile, and the fine pores generated on the surface are smaller than those of the conventional composition tile. Therefore, when wax is applied, the amount of wax penetrating from the fine pores on the tile surface can be reduced, so that the effect of sufficient wax is much smaller than that of conventional composition tiles. Can be obtained.

The filler used in the antifouling flooring of the present invention is not particularly limited as long as the average particle size is 1 to 15 μm, but it is easy to process with a calendar roll or the like as a flooring, in addition, the functionality as a flooring, For example, from the viewpoint of surface strength and the like, any one or more of calcium carbonate, talc, clay, magnesium oxide, magnesium hydroxide can be preferably used, and further, calcium carbonate, talc, clay are calender rolls, etc. It can be used more preferably from the viewpoints of workability and cost.

  In addition, as the thermoplastic resin used in the antifouling floor material of the present invention, any known thermoplastic resin can be used, but the physical properties such as processability, dimensional stability as a flooring material, and cost From such a viewpoint, it is preferable to use one or both of a polyvinyl chloride resin and an ethylene-vinyl acetate copolymer resin.

Moreover, you may use polyolefin resin etc. as a thermoplastic resin used for this invention antifouling flooring. Specifically, a low density polyethylene resin and a polypropylene resin may be used alone or in combination. Moreover, although only the said polyolefin resin may be used, from a viewpoint of improving the workability by a calendar roll etc., both ethylene-vinyl acetate copolymer resin and styrene-butadiene rubber are mixed, or any one is mixed. It is preferable to use it.

Furthermore, a styrene-butadiene rubber may be used alone as the thermoplastic resin used in the antifouling floor material of the present invention. Styrene-butadiene rubber can be preferably used from the viewpoint of workability such as being able to be molded at a relatively low temperature with a calender roll or the like, and functional aspects as a flooring material such as slip resistance.

(Sample preparation)
After kneading with a Banbury mixer for about 2 minutes at the material shown in Table 1 (the notation "charcoal cal" in "Table 1" means "calcium carbonate"), and the blending ratio, Mixing roll (front roll: about 110 ° C, rear roll: about 150 ° C, front and rear roll gap: about 20mm), about 2 minutes, turning back 10 times (cutting the material in the width direction and rounding it into a roll, then mixing) Rolling was performed), and a sheet of about 2 mm was formed by a calender roll (upper roll: about 120 ° C., lower roll: about 110 ° C.).

(Table 1)
* 1 Average particle diameter: measured according to JISZ8819-2.
* 2 Filler product number: # 100 (Product name: Heavy calcium carbonate fine particles (Escalon) Brand: # 100 Manufacturer: Sankyo Seimitsu Co., Ltd.)
# 200 (Product name: Heavy calcium carbonate fine particles (Escalon)
Brand: # 200 Manufacturer: Sankyo Seiko Co., Ltd.)
# 2000 (Product name: Heavy calcium carbonate fine particles (Escalon)
Brand: # 2000 Manufacturer: Sankyo Seiko Co., Ltd.)
# 2300 (Product name: Heavy calcium carbonate fine particles (Escalon) Brand: # 2300 Manufacturer: Sankyo Seimitsu Co., Ltd.)
MC120 (Product name: MicronCal MC120 Manufacturer: Asahi Minesue Co., Ltd.)
G100 (Product name: Sandy coal Cal G series Brand: 100
Manufacturer: Sankyo Seiko Co., Ltd.)
A (Product name: Heavy calcium carbonate general-purpose products Brand: A Manufacturer: Sankyo Seiko Co., Ltd.)
Special Grade # 3 (Product Name: Heavy Calcium Carbonate General Purpose Brand: Special Grade # 3 Manufacturer: Sankyo Seiko Co., Ltd.)
KR clay (Product name: KR clay Product name: Rouseki clay manufacturer: Katsumiyama Mining Co., Ltd.)
NK64 (Business Item: Imported Talc Manufacturer: Fuji Talc Industry Co., Ltd.)

* 3PVC: A mixture of polyvinyl chloride resin 1 (average polymerization degree: 1400), polyvinyl chloride resin 2 (average polymerization degree: 700, vinyl acetate content: 10%), and polyvinyl chloride resin 3 (average polymerization degree: 700) * 4 Other resins: Low density polyethylene resin, ethylene-vinyl acetate copolymer resin, polystyrene resin, SBR styrene / isoprene copolymer resin mixture * 5 Stabilizer: Zinc-based stabilizer * Titanium oxide (trade name: R103, 堺Chemical Industry Co., Ltd.)
* 7 Processing aids: stearic acid,

1.
Measure the E value of 3 points of the 900 mm square sample of the dirt test, calculate the average value to make the E value of the blank, and paste four 900 mm square samples on the floor surface to the walking amount of about 200 people / day, The 20-point E value was measured from the order of the most dirty part after 20 days, the average value was calculated, and the difference between the E value before walking and the E value after walking was calculated as a ΔE value.
In addition, the E value obtained by measuring the sample as it was after walking with the same measurement method as described above, the E value of the blank ("initial stain"), and the sample after wiping off the stain with a dry towel after walking. ΔE value between the measured E value and the blank E value (“initial stain”), and the ΔE value between the E value measured from the sample after wiping with a towel dried after walking and the blank E value ( “After dry wiping”) and the E value of the sample after wiping off the dirt with a towel wetted by hand-drawing after walking and the E value of the blank and the E value of the blank (“after water wiping”).
Further, the Z value was calculated from the ΔE value based on the following equation.
Z value = 0.25ΔE + 1.44
The Z value is indicated by the following index.
・ Degree of dirt is not worrisome at all: 1
・ Degree of little dirt: 2
・ Slightly worried about dirt: 3
・ Degree of dirt: 4
・ Degree of worries about dirt: 5
・ Degree of dirt is a major concern: 6
・ Degree of contamination: 7

2.
Glossiness test A 150 mm square sample is cured for 24 hours under conditions of 23 ° C. ± 2 ° C. and humidity 70% ± 15%, and urethane resin wax (trade name: U wax, manufactured by Toli Co., Ltd.) is applied to the sample. Apply once to 5 times with a sponge and dry the wax by curing for 24 hours under the same conditions as above, then gloss meter (model: GM-3D, manufacturer: Murakami Color Technology Research) 3), the glossiness at three arbitrary points on the surface of the sample was measured, and the average value was calculated. When the wax is applied twice or more, after the wax is applied, the wax is dried by curing for 24 hours under the same conditions as described above, and then the gloss is measured with a gloss meter in the same manner as described above. The average value was calculated. Moreover, the glossiness of the sample which does not apply | coat a wax was made into the blank.

In the dirt test of the table, it can be seen that the examples are excellent in any of “initial dirt”, “after dry wiping”, and “after water wiping”. In particular, “after dry wiping” and “after water wiping” are “after dry wiping” and the Z value is 2.3 to 3.9, and “after water wiping” is Z value 2.2 to 3 In contrast, the comparative example is “after dry wiping” and the Z value is 4.4 to 5.3, and “after water wiping” is the Z value 4.0 to 4.8. It is understood that is superior.

Further, when Example 8 and Comparative Example 1 are compared, it can be seen that when the average particle diameter exceeds 15 μm, it is inferior in any of “initial dirt”, “after dry wiping”, and “after water wiping”.

Therefore, in the “stain test” shown in the table, it can be seen that the average particle size of the filler is large and contributes to soil resistance and soil removability.

Further, from the glossiness test values shown in the table, the gloss obtained by applying two or more times of the wax of the comparative example is obtained in most examples without applying the wax, and at least one wax of the comparative example is obtained. It can be seen that the glossiness of the coating can be obtained. For example, even in Example 8 having the lowest glossiness in the blank, the glossiness is 41, and the glossiness substantially corresponds to the glossiness obtained by applying the waxes of Comparative Examples 1 to 3 once.
Therefore, it can be seen that the antifouling flooring of the present invention can obtain high surface gloss and a beautiful surface state.

Moreover, when the glossiness of the one-time wax application of the example and the glossiness of Comparative Examples 1 to 3 are compared, the glossiness of the Example is about 70 to 80, which corresponds to the glossiness in Comparative Examples 1 to 3. It can be seen that the glossiness obtained is the glossiness when the wax is applied three times.

The glossiness of the floor material surface on which the wax has been applied at least once is a quantitative indicator that the wax is fixed on the floor material surface, that is, does not penetrate into the interior from the floor material surface and remains on the surface.
Therefore, it can be seen that the antifouling flooring of the present invention can sufficiently exhibit its effect with at most half the amount of wax of the conventional product (comparative example).

Claims (4)

  An antifouling flooring material comprising a thermoplastic resin and containing a filler, wherein the filler has an average particle diameter of 1 to 15 µm. The antifouling flooring according to claim 1, wherein the filler contains one or more of calcium carbonate, talc, clay, magnesium oxide, and magnesium hydroxide. The antifouling flooring according to claim 1 or 2, wherein the thermoplastic resin is a polyvinyl chloride resin and / or an ethylene-vinyl acetate copolymer resin. The antifouling flooring according to claim 1 or 2, wherein the thermoplastic resin contains one or more of a low density polyethylene resin, an ethylene-vinyl acetate copolymer resin, a polypropylene resin, and a styrene-butadiene rubber.