JPH05214803A - Laying tile - Google Patents

Abstract

PURPOSE:To provide excellent durability by a method wherein a reinforcing layer is formed below a decorative layer the surface of which is covered with a clear wear resisting layer, a foamed resin layer is laminated below the reinforcing part, and a balance sheet is laminated on an underfloor ground adhesion surface to form a laying tile. CONSTITUTION:A decorative layer 3 formed of a pattern layer 1 wherein a surface is covered with a clear wear resisting layer 2 and printing is applied on glass non-woven cloth is formed. A reinforcing part 7 wherein fiber cloth 6 impregnated with resin is nipped between upper and lower reinforcing layers 4 and 5 is formed below the decorative layer 3. A foamed layer 8 formed of PVC and urethane is formed below the reinforcing part 7 and a balance sheet 9 is laminated between the under surface of the foamed layer 8a and an underfloor ground adhesion surface to form a laying tile 10. Thus, the laying tile is durable against rubbing of a chair and resistance to remaining dent owing to a load is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor tile (hereinafter referred to as "L") which is excellent in dimensional and shape stability and durability, particularly durability against ironing of a chair and which can be used on a double floor.
(Referred to as LT).

[0002]

2. Description of the Related Art Conventionally, various floor tiles have been used on a double floor.
It is disclosed in Japanese Patent Publication No. 4) and forms an assembly in which separated small panel pieces having legs at four corners are connected. In the present specification, the double floor means a floor panel in which a unit having a leg portion and a top plate is connected on a floor base, and a space is provided between the top plate and the floor base, and a standing tile is It means a tile that is used as a floor covering that does not necessarily use an adhesive.

[0003]

Further, when such a flooring material is used in an office, durability against ironing by a chair becomes a particular problem. When the conventional floor covering as described above is used for such an application, the floor is deformed or swollen.

Japanese Utility Model Laid-Open No. 23436/1990 discloses a synthetic resin tile in which two layers of a reinforcing material impregnated with a foaming resin are embedded, but this construction is inferior in design and is not suitable for chairs and the like. There is a drawback that it is weak against squeezing.

Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a laid floor tile which is excellent in durability, particularly in dimensional stability and shape stability against ironing by a chair or the like, and which is rich in design. Is to provide. Still another object of the present invention is to provide a laid tile having excellent antistatic performance.

[0006]

In the first aspect, the present invention provides a decorative layer, an upper reinforcing layer and a lower reinforcing layer, and an upper reinforcing layer having a pattern layer whose surface is covered with a transparent abrasion resistant layer. And a lower reinforcing layer, the fiber cloth is impregnated with a resin that constitutes the upper reinforcing layer or the lower reinforcing layer, and the reinforcing portion existing under the decorative layer is reinforced. There is provided a standing tile, which comprises a foamed resin layer existing under a section and a balance sheet existing under the foamed resin layer.

[0007] In a second aspect, the present invention provides the above-mentioned laid-down tile, wherein at least one of the decorative layer, the reinforcing portion, the foamed resin layer and the balance sheet is an antistatic layer.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a portion of a floor tile 10 of a preferred embodiment of the present invention. Reference numeral 1 is a pattern layer, for example, polyvinyl chloride (PVC), acrylic resin or other resin having a thickness of 0. It is obtained by forming an ink print layer of 05 to 0.30 mm. It should be noted that a pattern other than the pattern obtained by printing (for example, a pattern obtained by kneading or scattering chips or the like) may be used. Reference numeral 2 denotes a transparent abrasion-resistant layer, which can be formed of, for example, PVC paste, cross-linked PVC, polyurethane, or acrylic resin, and the thickness of the abrasion-resistant layer depends on the application, but is preferably 0.1 to 0.8 mm, more preferably Is 0.3 to 0.6 mm.

The pattern layer 1 and the abrasion-resistant layer 2 are generally made of a conventional material, unless there is a particular problem with respect to the mutual compatibility of both layers and the compatibility between the decorative layer formed thereby and the reinforcing portion formed thereunder. You can use what is used for.
As shown in the figure, the pattern layer 1 is covered with the transparent abrasion-resistant layer 2, and both layers are adhered by a suitable method (for example, thermocompression bonding, via an adhesive, etc.) to form the decorative layer 3. Further, the decorative layer 3 may be embossed with an embossing roll.

Under the decorative layer 3, there is formed a reinforcing portion 7 composed of an upper reinforcing layer 4, a lower reinforcing layer 5 and a fiber cloth 6 sandwiched by these upper and lower reinforcing layers. The fiber cloth is impregnated with the resin of the upper reinforcing layer and / or the lower reinforcing layer according to the order and method of forming the reinforcing layer. By impregnating the fiber cloth with the resin in this way,
The ironing resistance of the product is improved.

The reinforcing layer is made of a non-foamed resin, for example, P
VC, urethane, and synthetic rubber can be used. Both reinforcing layers may be the same resin, or may be different as long as there is no problem in mutual adhesiveness or the like. By making the reinforcing layer a non-foamed resin, the ironing resistance is improved. The fiber cloth preferably has high adhesiveness to the non-foamed resin, and for example, glass fiber cloth, vinylon, polyester fiber cloth can be used. When using a glass fiber cloth, 20 to 100 g / m ² of glass fiber woven cloth or nonwoven cloth is particularly preferable. It is also preferable to use a fiber cloth of another material having a similar weight, for example, a polyester nonwoven cloth.

The thickness of each of the upper reinforcing layer and the lower reinforcing layer is preferably 0.4 to 1.5 mm, more preferably 0.1.
It is particularly preferable to form the non-foamed resin having a thickness of 5 to 1.2 mm. Further, the thicknesses of the upper reinforcing layer and the lower reinforcing layer may be the same or different. For impregnating the fiber cloth 6 with the resin of the reinforcing layer, various methods such as coating and dipping can be adopted. For example, when using paste PVC as a reinforcing layer,
After applying the PVC paste on the release base material, a method can be adopted in which the fiber cloth is immersed in the PVC by dipping the fiber cloth.

The reinforcing portion and the decorative layer can be adhered to each other by an appropriate method (for example, an adhesive or thermocompression bonding) depending on the material used. Furthermore, depending on the use of the tile, both the upper reinforcing layer and the lower reinforcing layer use a reactive plasticizer to increase the hardness or enhance the reinforcing effect by crosslinking the binder (resin of the reinforcing layer). You can
If desired, a sealing layer may be provided between the fiber cloth 6 and the upper reinforcing layer 4.

A foam layer 8 is formed under the reinforcing portion 7. The foam layer 8 may be independent foam or continuous foam. By forming the foamed layer, it is possible to improve the walking sensation by providing an appropriate cushioning property. The foam layer 8 preferably contains a filler, and the filler is less than 40 parts by weight, preferably less than 35 parts by weight, based on 100 parts by weight of the foam layer resin. Examples of the resin forming the foam layer include PVC, urethane, synthetic rubber, EVA and the like. The filler can be appropriately selected according to the use of the foam layer and tile to be used, etc., but generally calcium carbonate, talc, clay, etc. are desirable. The foam layer is 1.3 to 4.0 times, preferably 1.5 to 3.0 times, and has a thickness of about 1.0 to 5.0 mm, preferably 1.0 to 4.0 mm. is there. Adhesion between the foam layer and the reinforcing portion can be carried out by an appropriate method as in the case of adhering other layers, for example, thermocompression or a method using an adhesive.

On the lower surface of the foamed layer 8, there is a balance sheet 9 located between the foamed layer 8 and the adhesive surface of the floor base. By providing a balance sheet, it is possible to prevent warpage and facilitate the replacement work. As a material for forming this balance sheet, for example, a resin such as a PVC sheet obtained by calendar extrusion can be mentioned. Polyolefin, EVA,
The thickness is 0.3 to 2.0 mm, preferably 0.5 to 1.8 mm. In the balance sheet, a filler is mixed with 100 parts by weight of the resin, and the amount thereof is 20 to 100 parts by weight, preferably 30 to 80 parts by weight, and particularly 40 to 60 parts by weight with respect to 100 parts by weight of the resin. It is compounded. As the filler, those similar to the filler for the foam layer can be used. Such a balance sheet can prevent the floor material from warping. Further, the warp prevention property is further improved by increasing the amount of the filler in the balance sheet. The adhesion between the balance sheet and the foam layer is the same as in the case of the other layers.

In a particularly preferred embodiment of the present invention, the thickness A of the portion above the upper reinforcing portion 4: the thickness B of the portion below the fiber cloth is preferably 20:80 to 45:55, more preferably 25: By setting the ratio to 75 to 40:60, particularly improved laying performance (that is, dimensional stability, shape stability, durability against ironing of the chair, etc.) can be obtained. The adhesion between the balance sheet and the foam layer is the same as in the case of the other layers.

In another preferred embodiment of the floor tile of the present invention, at least one of the constituent layers of the floor tile of the present invention described above, that is, the decorative layer, the reinforcing portion, the foam layer and the balance sheet is antistatic. It is in layers.

When the decorative layer is used as an antistatic layer, for example, a transparent wear-resistant layer is provided with a nonionic activator such as a polyoxyethylene derivative, a fatty acid pentaerythritol (eg Destat AL, manufactured by Kyoei Yushi Co., Ltd.) or a cationic activator. , For example, primary amine salt, quaternary ammonium salt, pyridine derivative (for example, CS-1000, manufactured by Shin Nippon Rika Co., Ltd.), anion activator, for example, alkyl sulfonate, ABS,
A surfactant such as an alkyl sulfate ester salt or a phosphate ester salt (eg, Resist, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) may be added.

When imparting antistatic performance to the reinforcing portion, the foam layer or the balance sheet, in addition to the above-mentioned surfactant, conductive carbon black (Ketjen black), carbon fiber, metal powder, metal fiber and other conductive materials are used. Fibers may be added. In particular, by adding an antistatic agent or a conductive substance to the foam layer, a remarkable antistatic effect can be obtained. For the first time, the human body voltage of 1000 V or less, which was unattainable with conventional plastic floor coverings, was obtained for the first time. I was able to achieve it.

FIG. 2 schematically shows a plan view of a part of the installed tile of the present invention in a construction state. The floor tile 22 of the present invention is arranged on the joint (joint) 21 of the free access floor 20. Dashed line 2 in "Fig. 2"
Reference numeral 1'denotes a joint 21 of the free access floor, which is a portion existing below the floor tile 22. Even if the tiles 23 of the floor tiles are arranged so as not to coincide with the joints 21 of the free access floor, the tiles will fit into the ground and absorb the unevenness of the ground to secure a good construction condition.

[0021]

[Operation of the invention]

-By providing a reinforcing layer, the chair is strong against ironing and the resistance to residual dents under load is improved. -Thickness of the tile portion above the upper reinforcing layer: By setting the thickness of the tile portion below the fiber cloth at a ratio of 25:75 to 45:55, the effect of preventing warpage is particularly improved. A warp prevention effect is further improved by using a balance sheet (preferably a filler having 40 parts by weight or more). -By forming at least one antistatic layer, improved antistatic performance can be obtained.

[0022]

EFFECTS OF THE INVENTION The floor tile of the present invention (a) can be laid and peeled up, and can be easily installed on a double floor; (b) excellent in dimensional stability and shape stability, warpage and during use. (C) The load resistance is excellent, and swelling does not occur even when the chair is ironed. (D) At least one antistatic layer is formed to prevent the tiles from laying down. (E) Abrasion resistance and fashionability (designability); (f) Good cushioning properties; (g) When laying down the tile of the present invention, of course In the case of applying with an adhesive, the balance sheet holds the flooring material, so that the peel-up property can be obtained.

[0023]

Example 1 A foamable PVC paste (for a foam layer) having a composition A shown in "Table 1" was applied onto a peelable substrate to form a pregel,
Next, a non-foaming PVC paste of the formulation B of "Table 1" is applied on this, and 50 g / m ² of a glass non-woven fabric is placed and impregnated on the paste to pre-gelate the non-foaming composition of the same formulation. A paste is applied and heated at 220 ° C. to be gelled and foamed (foaming ratio 2.3 times) to form a foamed layer and a reinforcing portion, and at the same time, a balance sheet having a thickness of 0.8 mm of the formulation C in “Table 1”. Was laminated on the lowermost surface so as to be adjacent to the foam layer.

Next, on a glass non-woven fabric impregnated with a PVC paste, a transparent abrasion-resistant PVC film is laminated with the pattern of a decorative film preliminarily formed with a printed pattern on the lower side,
A decorative layer with a total thickness of 0.6 mm was obtained. The obtained decorative layer is PV
After it is laminated on the reinforcing part with C adhesive, it is cut into tiles of 50 cm on each side, and the thickness of each is 0.6 mm for the decorative layer, 0.7 mm for the upper reinforcing layer, 0.3 mm for the fiber cloth, and 0.7 mm for the lower reinforcing layer. , A foam layer of 2.4 mm and a balance sheet of 0.8 mm were obtained.

[0025]

[Table 1] Formulation A Formulation B Formulation C (Foaming layer formulation) (Reinforcement layer formulation) (Balance sheet) (Material) PHR (Material) PHR (Material) PHR PSL10 64 P475 60 SS110 100 75BX 36 PBMB5 40 DOP 58 DOP 40 DOP 45 AC309 2.0 AC309 3.3 3.3 AC173 4.5 AZ-S 1.75 NN200 53 NN200 200

PSL10: Polyvinyl chloride (manufactured by Kanegafuchi Chemical Industry) 75BX: Polyvinyl chloride (manufactured by Mitsubishi Monsanto) DOP: Di-2-ethylhexyl phthalate (manufactured by Toho Rika) AC309: Ba / Zn stabilizer (manufactured by Asahi Denka Co., Ltd.) AZ-S: Azodicarbonamide foaming agent (manufactured by Eiwa Chemical Co., Ltd.) NN200: Calcium carbonate (manufactured by Nitto Koka) P475: Polyvinyl chloride (manufactured by Mitsubishi Monsanto) PBMB5: Polyvinyl chloride (manufactured by Kaneka Corporation) SS110: Polychlorinated Vinyl (manufactured by Denki Kagaku) AC173: Ba / Zn (manufactured by Asahi Denka)

In Example 1, (upper reinforcing layer + decorative layer): (fiber cloth + lower reinforcing layer + foaming layer + balance sheet) = (0.7 + 0.6) :( 0.3 + 0.7 + 2.4 + 0.0) 8) = 1.3: 4.2 ≈ 1: 3.2.

[0028]

[Comparative Example] 3.0 mm foam (material name PVC) substrate (without balance sheet) 1.25 mm resin (material name PV)
Non-impregnated glass net sandwiched by layer C) (50 g / m
² ) was formed and a 0.7 mm thick PVC transparent film was laminated on the surface to obtain a tile floor material.

[0029]

Example 2 Example 1 was repeated except that the abrasion resistant layer, the reinforcing portion and the foam layer of Example 1 were each formed of the composition having the composition shown in Table 2.

[0030]

[Table 2] Antistatic compounding Wear-resistant layer Reinforcing layer Foaming layer (material) PHR (material) PHR (material) PHR SS110 50 P475 60 PSL10 64 SS80 50 PBMB5 40 75BX 36 DOP 28 DOP 30 DOP 58 Resinstat 212 7 AC309 3.3 AC309 2.0 Register 212 212 AZ-S 1.75 NN200 53 M7260 2 Register 212 4.0 4.0 EP850 5

SS80: Polyvinyl chloride (manufactured by Electrochemical) Resist 212: Anionic surfactant (manufactured by Daiichi Kogyo Seiyaku) M7260: Ba-Zn stabilizer (manufactured by Dainippon Ink) EP850: Epoxy heat stabilizer ( (Manufactured by Dainippon Ink)

Various tests were conducted using the tiles obtained in Examples 1 and 2 and Comparative Example to compare their performances. The results are shown in "Table 3".

[0033]

[Table 3] Example 1 Example 2 Comparative example Warp ○ ○ ○ Dimensional change 0.060 mm 0.070 mm 0.085 mm Joint resistance ski ○ ○ ○ Human body voltage (normal foot / V) 2340 980 3200 Issuki squeeze ○ ○ × (Blistering) Free access adaptability ○ ◎ ×

In "Table 3", the term "warp" refers to JIS A570.
According to the length change test by heating based on 5, the test is a test for visually evaluating the warp when the sample is heated and then cooled to room temperature of 20 ° C. to promote the evaluation of the warpage over time;
It is a test of length change due to heating based on JIS A5705 (however, the sample is measured after cutting into 30.3 cm square. The measured value is shown in the table); the joint resistance ski is JIS A570.
This is a test to evaluate the thermal expansion coefficient based on 5 and the change in sample size over time (coefficient of thermal expansion is preferably 10 ^-4 or less); the human body voltage is based on the Stroll method based on JIS L1021. It is a test to measure the electrification voltage when a tester actually walks on a sample under constant temperature and humidity conditions of 20 ° C and 40% (a electrification voltage of 1000 V or less is desirable); chair ironing is a chair made by Yasuda Seiki Apply a total load of 120 kg to three iron wheels with a diameter of 7.5 cm using a wheel tester, and add 3
The table on which the seed sample was attached was rotated at 9.3 rpm, the caster equipped with an iron wheel was rotated at 25 rpm, and it was inverted every 10 minutes to observe the degree of swelling of the sample, and the test ended when one of the samples began to swell. Yes; Free access adaptability is the adaptability to the free access floor obtained from the comprehensive evaluation of the above test results.

As is clear from the above results, the tiles of Example 1 and Example 2 have excellent dimensional stability, warpage does not occur, and there is no joint gap. Especially, the tiles can be comfortably used by laying them on a free access floor. A floor tile that can be obtained. On the other hand, the tiles of Comparative Examples were inferior in dimensional stability to those of Examples 1 and 2 and were shown to be extremely weak against ironing by a chair. Furthermore, in Example 2, the antistatic effect on the slippery feet was good at 980V. On the other hand, in the comparative example, it is obvious that static electricity of 3200 V is generated by the slippery feet and the antistatic effect is inferior to that of the present invention.

As described above, according to the present invention, the warp, the joint gap,
It provides a floor tile that is optimal for covering free access floors without swelling due to ironing by chairs, and the first durable floor material suitable for free access floors and OA floors was obtained.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a part of a floor tile of the present invention.

FIG. 2 is a schematic plan view showing a construction state of a floor tile of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pattern layer, 2 ... Transparent abrasion resistant layer, 3 ... Decorative layer, 4 ... Upper reinforcement layer, 5 ... Lower reinforcement layer, 6 ... Fiber cloth, 7 ... Reinforcement part, 8
... Foamed resin layer, 9 ... Balance sheet, 10 ... Laying tile, 20 ... Free access floor, 21, 21 '... Joint, 22 ... Laying tile, 23 ... Joint.

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[Procedure amendment]

[Submission date] February 21, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a portion of a floor tile 10 of a preferred embodiment of the present invention. 1 is a pattern layer, for example, polyvinyl chloride (PVC), acrylic resin or other resin having a thickness of 0. It is obtained by forming an ink print layer of 05 to 0.30 mm. It should be noted that a pattern other than the pattern obtained by printing (for example, a pattern obtained by kneading or scattering chips or the like) may be used. Reference numeral 2 is a transparent abrasion-resistant layer, which can be formed of, for example, PVC paste, cross-linked PVC, polyurethane, or acrylic resin, and the thickness of the abrasion-resistant layer depends on the application, but is preferably 0.1 to 1.4 mm, more preferably Is 0.3 to 0.6 mm.

Claims (2)

[Claims] 1. A decorative layer having a pattern layer whose surface is covered with a transparent abrasion resistant layer, an upper reinforcing layer and a lower reinforcing layer, and a fiber cloth sandwiched by the upper reinforcing layer and the lower reinforcing layer. The fiber cloth is impregnated with the resin constituting the upper reinforcing layer or the lower reinforcing layer, the reinforcing portion under the decorative layer, the foamed resin layer under the reinforcing portion, and the foamed resin. Laying tiles, which are characterized by being formed by stacking balance sheets existing below the layers. 2. At least one of the decorative layer, the reinforcing portion, the foamed resin layer and the balance sheet has antistatic properties.
The listed tile.