JPH07726U - Floor tiles - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a floor tile that is prevented from warping during construction, has excellent stain resistance and durability, and has good adhesion performance to a substrate. [Structure] A plastic floor tile is provided with a surface protective layer of an ultraviolet curable resin, and the back surface of the floor tile is also covered with an ultraviolet curable resin. The surface protective layer has a relatively large thickness and a back surface coating layer. Is a floor tile characterized by being thinner than the surface protection layer.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The invention of the present application is a floor in which an ultraviolet curing (hereinafter abbreviated as UV) resin layer is formed on the front surface and a resin layer is also coated on the back surface, which is easy to apply with an adhesive, is durable, and does not warp. Regarding tiles.

[0002]

[Prior art and its problems]

 It has been generally known that, by applying an ultraviolet curable resin to the surface of a flooring material, the advantages that heel marks are less likely to be attached and dirt is less likely to occur are as shown in Japanese Patent Publication No. 53-21209. .

However, in order to improve the stain resistance, it is necessary to increase the crosslink density of the ultraviolet curable resin. Increasing the crosslink density inevitably increased the resin shrinkage, causing the tile to warp. Therefore, when the UV resin is applied thickly, it is necessary to suppress the crosslinking density of the UV resin in order to prevent warpage. However, if the crosslink density is low, there is a problem in that the floor tile cannot have sufficient stain resistance.

Further, an ultraviolet curable resin having a high cross-linking density and good stain resistance can be applied only thinly in order to prevent warpage, so that there is a problem of poor durability.

[0005]

[Means for solving problems]

 The present invention is a floor tile that solves these problems. A warp is formed by forming a protective layer on the surface of the floor tile with a UV resin and coating the back surface of the floor tile with a UV resin regardless of the crosslink density. The present invention provides a floor tile which is free from stains, has excellent stain resistance and durability, and has good adhesion performance to a substrate.

According to the present invention, in a structure in which a surface protective layer of an ultraviolet curable resin is formed on a plastic floor tile, the back surface of the floor tile is also covered with the ultraviolet curable resin layer, and the surface protective layer side has a comparative thickness. The gist of the floor tile is a fat layer, and the back surface coating layer is thinner than the protective layer. ▲

A description will be given below with reference to the drawings. FIG. 1 is a sectional view of a floor tile of the present invention. 1 is a surface protective layer of the floor tile of the present invention, which is made of UV resin. 2 is the existing plastic floor tile. 3 is a backside UV coating layer that covers the backside of the floor tile of the present invention with a thickness smaller than that of the surface layer 1. The ratio of the thickness of the UV resin on the surface protective layer to the thickness of the back surface layer is preferably 1: 1 to 8: 1. ▲

The UV resins 1 and 3 are polyfunctional monomers, photoinitiators (sensitizers),
It is composed of three functional unsaturated resin components. As the functional unsaturated resin,
Polyester acrylate, urethane polyester acrylate, polyester methacrylate, and epoxy acrylate are preferable. ▲

The polyfunctional monomer plays two roles of a crosslinking agent and an active solvent.
Examples of polyfunctional monomers include 1.6 hexanediol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate and other polyfunctional acrylates, and tris- (2-methacryloyl, oxyethyl) -isocyanurate and other isocyanurates. Derivatives and the like are preferred. ▲

As the photoinitiator, benzoin and its derivative, benzophenone and its derivative, polycyclic aromatic ketone and halogen compound are preferable. ▲

Numeral 2 is a plastic floor tile such as an existing vinyl chloride resin having a thickness of 1.6 to 3.2 mm, and is made of a soft synthetic resin in addition to the usual PVC single-layer tile and laminated tile, for example, the middle portion. A soft synthetic resin layer may be laminated on the surface of the intermediate layer or the non-woven fabric layer, or a backing material may be laminated on the back surface. ▲

The front surface layer 1 and the back surface coating layer 3 are irradiated with an ultraviolet irradiation lamp to be solidified. In the present invention, the backside coating layer 3 is preferably 10 to 100 .mu.m, and the thickness ratio of the surface protection layer .DELTA.: Backside coating layer is preferably 1: 1 to 8: 1. In the present invention, UV resin can be used regardless of the cross-linking density, and the higher the cross-linking density, the higher the hardness of the film. The present invention can be implemented with a UV resin having a relatively high crosslinking density. ▲

In this way, the floor tile 4 of the present invention is obtained. The floor tile 4 has no warp and has a good stain resistance. ▲

▲

[Example 1] 60-μm-thick uree on the surface of a PVC floor tile (New MV Toyo Rinolyum Co., Ltd.) The initiator benzophenone was added, and irradiation with a UV lamp was performed to form a protective layer on the surface of the tile. ▲

Next, the same UV resin as the surface protective layer was applied to the back surface of the tile and irradiated with a UV lamp to obtain a back surface coating layer with a thickness of 25 μm. ▲

Regarding the degree of showing the crosslinking density in Example 1, the hardness of the UV resin film after irradiation with ultraviolet rays was a pencil hardness of 4H, which was a considerably high crosslinking density. ▲

▲

Example 2 ▲ A UV-resin surface protection layer of a polyester alkylate type having a relatively low cross-linking density was formed on the floor tile of Example 1 to a thickness of 120 μ, and 2 was formed on the back surface of the floor tile.
It was covered with the same resin to a thickness of 5 μm to obtain a floor tile of the present invention. The UV resin of Example 2 had a pencil hardness of 2H. ▲

▲

[Comparative Example 1] A floor tile having a thickness of 60 µm and coated with the same UV resin as in Example 1 was obtained. ▲

▲

[Comparative Example 2] A UV resin surface protective layer having a relatively low crosslink density of the polyester acrylate of Comparative Example 2 was formed on the same floor tile as in Example 1 to a thickness of 120 µm to obtain a floor tile. ▲

The floor tiles obtained in Examples 1 and 2 and Comparative Examples 1 and 2 were left to stand and the warpage was measured. ▲

(1) The same UV resin film as the surface protective layer was formed to a thickness of 100 μm and completely abraded by a Taber tester, and the number of revolutions thereof was measured. ▲

Further, the floor tile was adhered to the base with an epoxy adhesive, and the adhesive strength was measured. The adhesion force indicates the strength per 1 cm of the sample. The results are shown in Table 1. ▲

▲

[Table 1] ▲

▲ In Example 1, no warpage occurred, and the stain resistance and durability were excellent,
The adhesive strength was the same as before, and it was a very excellent floor tile. In Example 2, the surface protective layer having low durability was provided, but since the thickness was twice that of Example 1, the durability as a tile was very high. Also, in Example 2, warpage was small. In Comparative Example 1, the warpage was large, and in Comparative Example 2 the warpage was suppressed to a relatively small range, but the durability of the surface protective layer was also poor. ▲

[0025] As described above, the present invention has no warp and has an appropriate adhesive force (5.0 kg / cm).
As described above, the floor tile coated with the UV resin can be satisfactorily constructed. Further, a thick UV resin layer having a thickness of 50 μm or more was formed on the surface, and the floor tile was excellent in abrasion resistance and stain resistance. ▲

▲

[Effects of the Invention] ▲ Even if the surface protective layer was applied thickly, the floor tile did not warp. ▲ Because the surface protective layer can be applied thickly, the durability of the protective layer continued for a long time. ▲
Even if a UV resin having a high cross-linking density was used, warpage did not occur, and a floor tile having high stain resistance was obtained. ▲ The adhesive strength was no different from that of conventional floor tiles. ▲
The heavy walking performance of floor tiles has been improved. ▲

[Brief description of drawings]

FIG. 1 is a sectional view of a floor tile of the present invention.

[Explanation of symbols]

 1 Surface protection layer of floor tile of the present invention 2 Existing plastic floor tile 3 Back coating layer of floor tile of the present invention

Claims (3)

[Scope of utility model registration request] 1. In a structure in which a surface protective layer of an ultraviolet curable resin is formed on a plastic floor tile, the back surface of the floor tile is also covered with the ultraviolet curable resin layer, and the surface protective layer side is a relatively thick resin layer. Floor tiles characterized in that the back cover layer is thinner than the protective layer. 2. The floor tile according to claim 1, wherein the back coating layer has a thickness of 10 to 100 μm. 3. The thickness ratio of the front surface protective layer to the back surface protective layer is 1 :.
Floor tile according to claim 1 or 2 which is from 1 to 8: 1.