JP2624418B2 - Laying tiles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, various laying tiles have been used on a double floor.
It is disclosed in Japanese Patent Application Publication No. 4 (1993) -1992, and forms an aggregate in which separated small panel pieces having legs at four corners are connected. In the present specification, a double floor means a floor panel in which units having legs and a top plate are connected on a floor base, and a floor panel having a space between the top plate and the floor base is used. It means a tile that is used by laying down without necessarily using an adhesive.

[0003]

Further, when such flooring is used in an office, durability against ironing by a chair is particularly problematic. When the above-mentioned conventional laying floor material is used for such an application, the floor material is deformed or swells.

Japanese Utility Model Laid-Open Publication No. Hei 2-323642 discloses a synthetic resin tile in which a reinforcing material impregnated with a foaming resin is embedded in two layers, but the design is inferior in design and chairs, etc. There is a disadvantage that it is weak against ironing.

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

[0006]

SUMMARY OF THE INVENTION In a first aspect, the present invention provides a decorative layer, an upper reinforcing layer, a lower reinforcing layer, and an upper reinforcing layer having a pattern layer whose surface is covered with a transparent wear-resistant layer. A fiber cloth sandwiched between the upper and lower reinforcement layers, the fiber cloth being impregnated with a resin constituting the upper or lower reinforcement layer. A tile is provided, in which a foamed resin layer present under a portion and a balance sheet present under the foamed resin layer are laminated.

[0007] In a second aspect, the present invention provides the laid 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 Hereinafter, the present invention will be described more specifically with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a portion of a laying tile 10 according to a preferred embodiment of the present invention. Reference numeral 1 denotes a pattern layer, for example, a polyvinyl chloride (PVC), an acrylic resin, or another resin having a thickness of about 0.10 mm by transfer printing, screen printing, gravure printing, or the like onto a glass nonwoven fabric, vinyl sheet, vinyl film, or a composite thereof. It is obtained by forming an ink print layer of 0.5 to 0.30 mm. Note that a pattern other than a 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 wear-resistant layer, which can be formed of, for example, a PVC paste, cross-linked PVC, polyurethane, or an acrylic resin. The thickness of the wear-resistant layer depends on the application, but is preferably 0.1 to 1.4 mm, more preferably. Is 0.3 to 0.6 mm.

The pattern layer 1 and the abrasion-resistant layer 2 are generally used as long as there is no particular problem with respect to the compatibility between the two layers and the compatibility between the decorative layer formed thereby and the reinforcement formed thereunder. Can be used.
As shown in the figure, the decorative layer 3 is formed by covering the pattern layer 1 with a transparent wear-resistant layer 2 and bonding the two layers by an appropriate method (for example, thermocompression bonding, an adhesive or the like). Further, the decoration layer 3 may be embossed with an embossing roll.

Below 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 between 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 layers. By impregnating the fiber cloth with resin in this way,
The ironing resistance of the product is improved.

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

Each of the upper reinforcing layer and the lower reinforcing layer preferably has a thickness of 0.4 to 1.5 mm, more preferably 0.5 to 1.5 mm.
It is particularly preferable to form a non-foamed resin of 5 to 1.2 mm. The thickness of the upper reinforcing layer and the lower reinforcing layer may be the same or different. In order to impregnate 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-like PVC as a reinforcing layer,
After applying the PVC paste on the release substrate, a method of immersing the fiber cloth so that the fiber cloth penetrates the PVC can be adopted.

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

A foam layer 8 is formed below the reinforcing portion 7. The foamed layer 8 may be closed foam or continuous foam. By using a foam layer, it is possible to provide a moderate cushioning property and improve walking feeling. 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 that forms the foam layer include PVC, urethane, synthetic rubber, and EVA. The filler can be appropriately selected according to the use of the foamed layer and tile to be used, but generally calcium carbonate, talc, clay and the like are desirable. The foamed layer is foamed 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. The bonding between the foam layer and the reinforcing portion can be performed by an appropriate method as in the case of bonding the other layers, and can be performed by, for example, thermocompression bonding or a method using an adhesive.

On the lower surface of the foam layer 8, there is provided a balance sheet 9 located between the foam layer 8 and the floor base adhesive surface. By providing the balance sheet, it is possible to prevent the warpage and to facilitate the replacement work. Examples of a material for forming this balance sheet include resins such as a PVC sheet obtained by calender extrusion, and polyolefin, EVA,
The thickness is between 0.3 and 2.0 mm, preferably between 0.5 and 1.8 mm. In the balance sheet, a filler is compounded with respect to 100 parts by weight of the resin, and the amount is 20 to 100 parts by weight, preferably 30 to 80 parts by weight, particularly 40 to 60 parts by weight with respect to 100 parts by weight of the resin. It is blended. As the filler, those similar to the filler of the foamed layer can be used. With such a balance sheet, warpage of the floor material can be prevented. Further, when the amount of the filler in the balance sheet is increased, the anti-warping property is further improved. 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 25:55. By setting the ratio to 75 to 40:60, particularly improved laying performance (that is, dimensional stability, shape stability, durability against ironing of a 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.

According to another preferred embodiment of the present invention, each of the constituent layers of the above-mentioned tile of the present invention, that is, at least one layer of the decorative layer, the reinforcing portion, the foam layer, and the balance sheet is provided with an antistatic property. Layer.

When the decorative layer is used as an antistatic layer, a nonionic activator, for example, a polyoxyethylene derivative, a fatty acid pentaerythritol (for example, Destat AL, manufactured by Kyoei Yushi Co., Ltd.) or a cationic activator For example, a primary amine salt, a quaternary ammonium salt, a pyridine derivative (for example, CS-1000, manufactured by Shin Nippon Rika Co., Ltd.), an anionic surfactant such as an alkyl sulfonate, ABS,
A surfactant such as an alkyl sulfate salt or a phosphoric acid ester salt (for example, Resistat, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) may be added.

When imparting antistatic performance to the reinforcing portion, foam layer or balance sheet, in addition to the above-mentioned surfactants, conductive carbon black (Ketjen black), carbon fiber, metal powder, metal fiber, and other conductive materials Functional fibers may be added. In particular, by adding an antistatic agent or a conductive substance to the foamed layer, a remarkable antistatic effect is obtained, and the conventional body laying floor material can reduce the human body voltage to 1000 V or less for the first time. Achieved.

FIG. 2 schematically shows a plan view of a part of a laid tile according to the present invention in a construction state. On the joint (joint) 21 of the free access floor 20, the laying tile 22 of the present invention is arranged. In FIG. 2, broken line 2
Reference numeral 1 'denotes a joint 21 of the free access floor, which is located below the laying tile 22. Even if the laid tile joints 23 are arranged without being matched with the joints 21 of the free access floor, the tiles are adapted to the groundwork, and the unevenness of the groundwork can be absorbed and a favorable construction state can be secured.

[0021]

Effect of the Invention

-By providing a reinforcing layer, it is strong against ironing of the chair, and the residual dent resistance of the 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 to a ratio of 25:75 to 45:55, the effect of preventing warpage is particularly improved. -The balance sheet (preferably having a filler content of 40 parts by weight or more) further improves the warpage prevention effect. -By forming at least one antistatic layer, improved antistatic performance can be obtained.

[0022]

According to the present invention, the laying tiles of the present invention are: (a) layable and peelable, and can be easily constructed on a double floor; (b) dimensional stability and shape stability are excellent, and warpage and use during use are possible. (C) has excellent load resistance and does not swell even when the chair is squeezed; (d) By forming at least one antistatic layer, the antistatic performance of the laid tiles (E) abrasion resistance and fashionability (design); (f) good cushioning properties; (g) when laying tiles of the present invention, Also, in the case of using an adhesive, a peel-up property can be obtained because the balance sheet holds the floor material.

[0023]

Example 1 A foamable PVC paste (for a foamed layer) of Formulation A shown in Table 1 was applied on a peelable substrate to form a pregel,
Next, a non-foamed PVC paste of Formulation B shown in Table 1 was applied thereonto, and a 50 g / m ² glass nonwoven fabric was placed thereon and impregnated to form a pregel. The paste is applied and heated gel and foamed at 220 ° C. (foaming ratio 2.3 times) to form a foamed layer and a reinforcing portion, and at the same time, a balance sheet having a composition C of Table 1 having a thickness of 0.8 mm. Was laminated adjacent to the foam layer on the lowermost surface.

Next, on a glass nonwoven fabric impregnated with a PVC paste, a decorative film having a printed pattern previously formed on a transparent abrasion-resistant PVC film is laminated with the pattern facing downward,
A decorative layer having a total thickness of 0.6 mm was obtained. The obtained decorative layer is PV
After laminating 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 decorative layer, 0.7 mm for upper reinforcing layer, 0.3 mm for fiber cloth, 0.7 mm for lower reinforcing layer. Thus, a laying tile of the present invention having a foamed layer of 2.4 mm and a balance sheet of 0.8 mm was obtained.

[0025]

Table 1 Formulation A Formulation B Formulation C (Formulation of foam layer) (Formulation of reinforcing layer) (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 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) AZ-S: Azodicarbonamide foaming agent (manufactured by Eiwa Kasei) NN200: Calcium carbonate (manufactured by Nitto Powder) P475: Polyvinyl chloride (manufactured by Mitsubishi Monsanto) PBMB5: Polyvinyl chloride (manufactured by Kanebuchi Chemical Industry) 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 + foam layer + balance sheet) = (0.7 + 0.6) :( 0.3 + 0.7 + 2.4 + 0.6. 8) = 1.3: 4.2 ≒ 1: 3.2.

[0028]

[Comparative Example] A 1.25 mm resin (material name PV) was applied to a 3.0 mm foam (material name PVC) base material (no balance sheet).
C) Non-impregnated glass net sandwiched by layers (50 g / m
² ) was formed, and a tile-like flooring material having a 0.7 mm PVC transparent film laminated on the surface was obtained.

[0029]

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

[0030]

[Table 2] Antistatic composition Wear-resistant layer Reinforcement layer Foam 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 ratiostat 212 7 AC309 3.3 AC309 2.0 Ratiostat 212 3.0 AZ-S 1.75 NN200 53 M7260 2 Ratiostat 212 4.0 EP850 5

SS80: polyvinyl chloride (manufactured by Denki Kagaku) Resistat 212: anionic surfactant (manufactured by Daiichi Kogyo Seiyaku) M7260: Ba-Zn stabilizer (manufactured by Dainippon Ink) EP850: epoxy heat stabilizer ( Dainippon Ink)

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

[0033]

[Table 3] Example 1 Example 2 Comparative Example Warp ○ ○ ○ Dimensional change 0.060mm 0.070mm 0.085mm Joint-proof skiving ○ ○ ○ Human body voltage (normal level / V) 2340 980 3200 Issugoki ○ ○ × (Bulging) Free access adaptability ○ ◎ ×

In Table 3, the term “warping” refers to JIS A570.
According to the length change test by heating based on No. 5, after heating the sample, it is a test for visually evaluating the warpage when cooled to a room temperature of 20 ° C. and accelerating evaluation of warpage;
This is a test for the change in length due to heating based on JIS A5705 (however, the sample was cut into a 30.3 cm square and measured. The measured value is shown in the table);
This is a test in which the thermal expansion coefficient is measured based on No. 5 and the daily change of the sample size is evaluated together (the thermal expansion coefficient is preferably 10 ⁻⁴ or less); the human body voltage is based on the Stroll method based on JIS L1021. Is a test to measure the charged voltage when the tester actually walks on the sample under constant temperature and humidity conditions of 20 ° C. and 40% (preferably charged voltage of 1000 V or less); Apply a total load of 120 kg to three 7.5 cm diameter iron wheels using a leg tester.
The table on which the seed sample was affixed was rotated at 9.3 rpm, and the caster equipped with an iron wheel was rotated at 25 rpm. The test was inverted every 10 minutes to observe the degree of blistering of the sample, and the test was terminated when any of the samples began to blister. Yes; free access adaptability is the adaptability to the free access floor obtained from the comprehensive evaluation of the test results.

As is clear from the above results, the tiles of Example 1 and Example 2 have excellent dimensional stability, do not warp and have no joints, and can be used comfortably only by laying them on the free access floor. A floor tile that can be obtained. On the other hand, in the tile of the comparative example, the dimensional stability was inferior to those of Examples 1 and 2, and it was shown that the tile was very weak against ironing by a chair. Furthermore, in Example 2, the antistatic effect with a slick foot was good at 980V. On the other hand, in the comparative example, static electricity of 3200 V is generated by the pick foot, and it is clear that the tile has a lower antistatic effect than the present invention.

As described above, according to the present invention, the warpage, the joint gap,
The present invention provides a floor tile that is most suitable for covering a free access floor without swelling caused by ironing by a chair, and a durable flooring material suitable for a free access floor and an OA floor was obtained for the first time.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a part of a laying tile according to the present invention.

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pattern layer, 2 ... Transparent wear-resistant layer, 3 ... Decoration layer, 4 ... Upper reinforcement layer, 5 ... Lower reinforcement layer, 6 ... Fiber cloth, 7 ... Reinforcement part, 8
... foam resin layer, 9 ... balance sheet, 10 ... laying tile, 20 ... free access floor, 21, 21 '... joint, 22 ... laying tile, 23 ... joint.

Continuation of the front page (56) References JP-A-3-144061 (JP, A) JP-A-61-142248 (JP, A) JP-A-62-196147 (JP, A) Jpn. , U) Hikaru 2-40529 (JP, U)

Claims (2)

(57) [Claims] A decorative layer having a pattern layer covered with a transparent wear-resistant layer, an upper reinforcing layer and a lower reinforcing layer, and a fiber cloth sandwiched between the upper and lower reinforcing layers. A fiber cloth impregnated with a resin constituting an upper reinforcing layer or a lower reinforcing layer, a reinforcing portion existing under the decorative layer, a foamed resin layer existing under the reinforcing portion, and the foamed resin. The balance sheet existing under the layer is laminated, and the ratio of the thickness of the tile portion above the upper reinforcing layer to the thickness of the tile portion below the fiber cloth is 25:75 to 45:55. Laying tiles. 2. The antistatic property of at least one of the decorative layer, the reinforcing portion, the foamed resin layer, and the balance sheet.
The tile described.