JPH064152B2 - Floor board - Google Patents

Description

TECHNICAL FIELD The present invention relates to a floorboard, and in particular, the present invention is to add at least ceramic fiber pieces to a coating resin or, if necessary, a ceramic abrasion resistance improver. The present invention relates to a floor board having excellent wear resistance, which has a resin coating film formed from a resin composition containing, on the surface of a base material pattern.

(Prior Art) Conventionally, a surface resin coating film made of a resin composition obtained by adding a wear resistance improver such as alumina or silica to a coating resin such as aminoalkyd resin, urethane resin, polyester resin, diallyl phthalate resin or epoxy resin. For the technology related to coated plywood for floors that has good wear resistance formed by
There are inventions disclosed in JP-B-49-19849, JP-B-49-48497 and JP-B-54-27870.

However, according to the above-mentioned conventional technique, since the wear resistance improver such as fine powder alumina or silica having a constant particle size is added to the coating resin, the fine powder alumina or silica is equivalent to the resin liquid. There are drawbacks such as settling without constant stirring, and the fact that when coated with a roll coater, etc., the dispersion is not uniform so that it selectively migrates to the surface of the pattern paper, etc. and a certain amount or more cannot be added to the resin. It was

(Problems to be Solved by the Invention) The present invention aims to eliminate and solve the above-mentioned drawbacks of the conventional technology.

That is, according to the invention of JP-B-49-19849, α-alumina having a particle size of 10 to 70 μm is added in an amount of 5 to 40% by weight with respect to the resin nonvolatile content. According to the invention of the publication, a compound fine powder containing 15 to 53% by weight of alumina having a new Mohs hardness of 10 or more, 40 to 70% by weight of silica, 20 to 40% by weight of carbon, and 10 to 30% by weight of boron, respectively. Provided is a wear-resistant decorative wood board having a surface resin coating film formed from a resin containing 5 to 40% by weight of any one or two or more kinds of compound fine powder added to a transparent synthetic resin component. According to the invention of Japanese Examined Patent Publication No. 54-27870, silicon carbide fine powder or (and) aluminum oxide fine powder having a new Mohs hardness of 10 or more and a particle size of 10 to 70 μ is used in an amount of 4 to 40 with respect to the resin content. And it provides a wear resistance of good floor coating plywood transparent synthetic resin coating film added amount% coated form.

However, in any of these conventional techniques, alumina, silica, silicon carbide fine powder having a certain particle size, etc. are added to the resin in a certain amount. There is a drawback in that the fine powder does not migrate to the coating surface together with the resin during the coating with a roll coater or the like, and the resin component selectively migrates to the coating surface due to this. Therefore, the present invention removes and eliminates these drawbacks of the prior art by using the means described below, and wear resistance, stain resistance, and crack resistance, that is, durability with very few cracks generated by the hot and cold repeated test. It provides a floor board having excellent properties.

(Means and Actions for Solving Problems) According to the present invention, by adding at least a ceramic fiber piece to a resin for coating on the surface of a base material on which a pattern is formed in advance, a fiber having a constant ceramic fiber piece can be obtained. Since it has a length and a fiber diameter, it floats in the resin without settling, and further has the effect of improving the resin viscosity. Even when used in combination, the wear resistance improver composed of these fine powders precipitates in the resin, or when the resin is applied to the pattern surface with a roll coater and transferred, only the resin component selectively moves. Since this can be prevented and the coating film can be formed on the surface of the patterned substrate while the wear resistance improver is uniformly dispersed, the following actions and effects are exhibited.

In the prior art, silica, alumina, and silicon carbide fine powder, which are added to the resin as the wear resistance improver, have significant precipitation in the resin when the particle size becomes relatively large, which is the upper limit of 60 to 70 μm. According to the present invention, the fiber length is 3 to 50μ on average, and the fiber diameter is 1 to 15μ,
Preferably, the average fiber length is 10 to 50μ, and the ceramic fiber pieces having a fiber diameter of 1 to 5μ and an aspect ratio (ratio of minor axis to major axis) of about 1/10 are added to the resin in a fixed amount and used. The fiber pieces are entangled and float in the resin liquid, and the resin viscosity is about 2-3 times higher than the resin viscosity in the conventional technique. As a result, the surface properties such as wear resistance are greatly improved compared to those of the prior art, but even if a ceramic wear resistance improver with a relatively large particle size is used, it does not precipitate in this resin. And the fine powder of ceramics and fiber pieces are coated on the surface of the pattern layer with the resin in a state of being uniformly dispersed on the surface of the pattern layer which causes abrasion resistance, stain resistance and crack resistance. A film surface will be formed.

According to the present invention, since a ceramic fiber piece having a certain size capable of improving the viscosity is added and used in the resin, when the undercoat coating or the top coating is applied on the surface of the pattern layer with a roll coater or the like, the resin The thixotropy as plasticity is improved, proper fluidity can be maintained for a long time, the coating amount that can be applied per roll coater is large, and the required coating thickness can be quickly and easily achieved within a short time. The workability such as being able to obtain the painted surface is improved.

Further, according to the present invention, as described above, the resin is 2 to 3 times as high as that of the prior art, and therefore, when drying after coating, the coated surface is made vertical so that hot air is blown like a wicket type dryer. Even if a drying method of spraying from the side of the coating film is adopted, it is possible to prevent the applied resin from dripping.

The conditions and means for realizing these effects are as follows.

At least 5 to 40 parts by weight of ceramic fiber pieces, and as necessary, to 100 parts by weight of the coating resin such as aminoalkyd resin, urethane resin, polyester resin, diallyl phthalate resin or epoxy resin in terms of solid content, and ceramic A total of 5 to 40 parts by weight of a ceramic component consisting of 5 to 20 parts by weight of a quality abrasion resistance improver is added.

Among the ceramic wear resistance improvers, there are those having a gray green to light gray color tone such as silicon carbide, or those that reduce the transparency or transparency of the resin such as silica fine powder, In order to eliminate these adverse effects, in the case of a wood grain pattern or the like, a resin colored in brown or yellow brown in advance is used, and a colored undercoating agent is coated on the pattern layer such as the wood grain pattern. It is an effective means to put it.

In order to achieve wear resistance of 500 times or more that conforms to the JAS standard, it is an effective means to make sure that the wear resistance improver consisting of a certain amount of ceramic components is uniformly and reliably contained in the coating layer. For this, a certain amount of ceramic fiber pieces is added to the resin, and the ceramic fiber pieces are suspended in the resin so that the resin viscosity has an appropriate value, for example, a viscosity of 15 to 60 seconds measured by a Ford cup tester. There is a need.

Further, it is necessary to obtain surface characteristics suitable for the scratch hardness by the JASB test by limiting the ceramic fiber pieces to a certain size. The hardness of the ceramic fiber piece and the ceramic wear resistance improver is 10 or more in Rockwell hardness.

(Example 1) A thin leaf decorative paper having a basis weight of 23 g / m ² on which a wood grain pattern is printed on a plywood substrate surface having a thickness of 12 mm is attached by a spreader using a urea vinyl acetate adhesive, and then hot pressed. After thermocompression bonding with a sander, lightly surface-polishing with a sander, actual processing with a tenor, V-groove processing with a V-groover, sealing with a wood sealer using a roll coater, and coloring the wood-grain surface to brown Wiped and brushed. Next, the concentration of a commercially available aminoalkyd resin was adjusted with a thinner solvent so that the solid content was 50%, and 4% by weight of alumina fine powder was added to 100 parts by weight of the solid content of the resin.
Then, 3% by weight of silicon carbide fine powder and 15% by weight of silica / alumina fiber pieces (average fiber length: 17 μm, fiber diameter: 3 μm) were added and blended. Then, using a roll coater, the resin composition having the above-mentioned composition is added.
g / m ² Base coat was applied and the latter half was dried. Then, 39 g of the above resin composition thereon using a curtain flow coater
/ M ² topcoat was applied.

The thus obtained coating film on the surface of the base material was heated by using a wicket hot air dryer, and a floorboard having a strong coating film formed on the patterned surface of the plywood surface could be manufactured.

(Example 2) After sanding was applied to a 12 mm-thick wood grain veneer plywood, actual processing was performed using a tenor, V groove processing was performed using a V gluver, wood sealer sealing coating was applied using a roll coater, and then wiping and brushing processing were performed. Next, a commercially available wet curable polyurethane resin liquid (solid content 50%) 20
0 parts by weight, that is, 4% by weight of alumina fine powder, 2% by weight of silicon carbide fine powder, and silica / alumina fiber pieces (average fiber length 10 microns, fiber diameter 2 0.8 micron) added at 15% by weight
The compounded thing was prepared. Then, using a roll coater, the resin composition having the above composition was dried in the latter half of 36 g / m ² undercoating. Then, 44 g / m ² of the resin composition was overcoated on the undercoat using a curtain flow coater. The coating film thus obtained on the surface of the base material was heated using a wicket hot air dryer in the same manner as in Example 1 to produce a floorboard having a strong coating film formed on the surface of the veneer plywood. .

The physical properties of the products of the present invention of Examples 1 and 2 obtained as described above are compared with those of conventional commercially available floorboards.

(Note) In the above table, the stain resistance A test is to test whether the floorboard surface is contaminated with crayon, ink or lipstick, and the B test is contamination of the floorboard surface with red tin and iodine alcohol. It is to test whether or not.

The JASB test is a test for a vertical surface decorative plate (FW) and is a scratch hardness test in which a load of 100 g is applied using a diamond needle, and the wear frequency is JIS-K6.
It is a taper abrasion test according to 902.

(Effects) As described above, the floorboard of the present invention has improved the number of abrasions by 4 to 5 times as compared with the conventional one, and is also clear from the results of the scratch test and the stain resistance test of the JAS test. Like
It can be seen that the surface performance is superior to the conventional product.

Claims (1)

[Claims] 1. A substrate having a pattern formed thereon has a fiber diameter of at least 1 to 15 μm and an average fiber length of 3 to 50 μm.
A floorboard having a coating film formed of a resin composition containing the ceramic fiber piece.