JPH0262664B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cork-like flooring material laid on an indoor floor surface.

Conventional technology In general, various materials are selected for flooring materials used as building materials depending on the purpose of use, but in recent years, materials with a base layer of natural cork have gradually been used. I'm getting used to it.

This kind of flooring material not only provides a suitable walking sensation because the cork itself is particularly rich in elasticity, but also
The patterns and colors of the cork surface give a sense of calm and stability to rooms and hallways, and can contribute to improving the living environment from a visual perspective.

In other words, since the cork itself has appropriate elasticity, flooring materials with cork as the base layer do not feel as hard as walking on concrete, and they are made of rubber-based or soft synthetic materials. Unlike flooring materials made of resin-based materials, it feels so soft that you won't feel like your feet are being caught.

In addition, the pattern and color tone of the cork surface create a profound and warm atmosphere, which has the advantage of giving a sense of calm and stability to the living environment. However, flooring materials using such natural cork as a base material layer also have characteristics that are unsuitable for flooring materials, and the following drawbacks have been pointed out. That is, firstly, it has high hygroscopicity, so the flooring material tends to get damp, and secondly, it is brittle and breaks easily, so it requires careful handling and lacks workability.

Problems to be Solved by the Invention The present invention has been made in view of the above-mentioned circumstances, and while retaining the advantages of conventional flooring materials with a base layer made of natural cork, The purpose of the present invention is to provide a cork-like flooring material that can solve the drawbacks of flooring materials made of wood layers.

Means for Solving the Problems That is, the cork-like flooring material of the present invention is constructed by laminating synthetic resin, so that it has a natural cork base layer and is improved in terms of both moisture absorption and workability. By making the material superior to flooring materials, and by setting the composition, hardness, rigidity, etc. of the base material layer within a certain range, the walking feel closely resembles that of flooring materials with a base layer of natural cork. By adding a cork-like pattern to its surface layer, it has an appearance similar to natural cork.

Embodiments of the Invention The present invention will be described in detail below with reference to illustrated embodiments.

The cork-like flooring material 100 illustrated in FIG. 1 is formed in the shape of a rectangular or square tile in plan view,
A cork-like pattern F appears on its surface. Therefore, such cork-like flooring material 100
When laid on the floor in rows and columns, it creates an atmosphere similar to that of a flooring material with a base layer of natural cork.

In other words, since the cork-like pattern F has a pattern and color tone that are the same or very similar to natural cork, it gives a sense of calm and stability to rooms and hallways,
The living environment is improved by creating a warm and dignified atmosphere.

When the cork-like flooring material 100 is formed into a tile shape as shown in the illustrated example, the size thereof is, for example, 30 x 30 cm,
If it is formed into a size of about 45 x 45 cm or 60 x 60 cm, it will be easier to handle during transportation and construction.

Note that the cork-like flooring material 100 does not necessarily have to be formed into a tile shape, and may be formed into a larger size.

FIG. 2 shows the cross-sectional shape of the cork-like flooring material 100 described above. As shown in the figure, the cork-like flooring material 100 includes a surface layer 20 made of a synthetic resin film on which the above-mentioned cork-like pattern F is printed on a base material layer 10 mainly made of polyvinyl chloride. A protective layer 30 made of a transparent synthetic resin film is laminated on the surface layer 20, and the base layer 10 is laminated on a balance layer 40 made of synthetic resin as necessary.

The base material layer 10 is made by mixing 40 to 80 parts of a plasticizer and 50 to 200 parts of a filler such as calcium carbonate to 100 parts of polyvinyl chloride as the main material, and foaming the mixture to a foaming ratio of 1.5 to 4 times. Made of foam.

Here, plasticizers are needed to adjust the flexibility of the main material, and fillers such as calcium carbonate are needed to adjust the stiffness of the main material, or the so-called "strength". Of this, the proportion of plasticizer is 40 to 80 parts per 100 parts of polyvinyl chloride, which is the main material.
If the amount is less than 50 parts, the base layer 10 will be too hard compared to cork, and if it exceeds 80 parts, it will be too soft, making it impossible to obtain an appropriate walking feeling as if walking on cork.

In addition, the required ratio of calcium carbonate is based on 100 parts of polyvinyl chloride, which is the main material.
50 to 200 parts is considered appropriate; if it is less than 40 parts, the base layer 10 will not have a cork-like feel due to poor rigidity, and if it exceeds 200 parts, it will become too hard and appropriate elasticity will not be obtained. .

The flexibility and stiffness described here work synergistically to provide a feel very similar to cork and unique elasticity.

On the other hand, it is necessary to configure the base material layer 10 from a foam in order to maintain the elasticity due to the synergistic effect of the above-mentioned flexibility and "strength", and the foaming ratio is 1.5 to 4 times. Desirably, if it is less than 1.5 times, it will become too hard and it will be impossible to maintain sufficient elasticity, whereas if it exceeds 4 times, it will become too soft and will not be able to maintain elasticity.

Therefore, a foaming ratio of about 1.5 to 4 times is desirable, and with this foaming ratio, elasticity very similar to that of cork can be obtained.

In addition, in order to increase the foaming ratio from 1.5 to 4 times, add 2 to 3 parts of a known foaming agent to 100 parts of polyvinyl chloride.
It is sufficient to mix within the range of 1.

The surface layer 20 is composed of a film made of polyvinyl chloride, for example, and in this case, it is desirable to mix 5 to 30 times the amount of plasticizer with respect to 100 parts of polyvinyl chloride.

In this case, if the plasticizer content is less than 5 parts, the surface layer will not have the necessary flexibility, and if it exceeds 30 parts, it will become too soft and unsuitable as a surface layer.

It is desirable that the protective layer 30 is made of the same synthetic resin film as the surface layer 20 described above.

In addition, the balance layer 40 is provided as necessary, and when the flooring material of the present invention is formed into a tile shape,
This prevents it from turning outward as shown in FIG.

When the cork-like flooring material 100 is formed in the shape of a tile, from the point of view of workability, it is preferable to use an inwardly curved one in which the center part bulges out more toward the surface than the surrounding area as shown in Fig. 3. However, as shown in FIG. 4, it is superior in that it has better workability when adhering to a floor surface and when peeling from a floor surface than a curved shape in which the periphery is curved toward the surface side.

When providing the balance layer 40, its composition is, for example, 100 parts of polyvinyl chloride as the main material, 30 to 40 parts of a plasticizer, and a filler such as calcium carbonate.
Prepared to contain 150-300 parts.

The purpose of adding plasticizer and calcium carbonate is
Similar to the case of the base material layer 10, if the content is at this level, the elasticity of the cork-like flooring material 100 will not be impaired. In addition, the balance layer 40 has a thickness of 1 mm.
The following is desirable.

The above-mentioned base layer 10, surface layer 20, and protective layer 30 are desirably integrated by heat fusion to form the cork-like flooring material of the present invention. The cork-like flooring material of the present invention may be formed by bonding.

Further, when the coil-like flooring material 100 is formed into a tile shape, it is desirable that the overall thickness thereof be approximately 2.5 mm to 5 mm in order to improve workability.

In that case, the thickness of the base layer is 2.0 to 4.0 mm, the thickness of the surface layer and the protective layer is 0.3 to 0.5 mm, and the thickness of the balance layer is preferably about 0.3 to 0.5 mm.

In such a cork-like flooring material 100, since the cork-like pattern printed on the surface layer 20 is visible through the transparent protective layer 30, natural cork is used as the base material layer as explained in FIG. The result is a similar appearance to that of flooring materials, and it is visually comparable to it.

In addition, the protective layer 30 prevents friction of the surface layer 20 and fading of the pattern, and also has the advantage of giving the cork-like pattern a three-dimensional effect.

In addition, since the base material layer 10 has elasticity equivalent to that of natural cork, a walking feeling similar to that of a flooring material made of cork as a base material layer can be obtained, and the tactile sensation when walking is not too hard. , or it's too soft so you don't feel like your feet are being caught.

Furthermore, the base material layer 10 occupies most of the total weight.
Since they are made of foam, weight reduction can be easily achieved, and the base layer 10, the surface layer 20,
The protective layer 30 and the balancing layer 40 provided as needed are both made of synthetic resin, so they are not hygroscopic and are not brittle or easily broken, so they are less expensive than flooring materials with natural cork as the base layer. It has excellent characteristics.

Effects of the Invention As is clear from the detailed description above, the cork-like flooring material according to the present invention has the advantage of not being hygroscopic like flooring materials with a base layer of natural cork and being easy to install. Moreover, since it has an appearance and walking feel that closely resembles natural cork, it is extremely useful when used as a substitute for conventional flooring materials with cork as a base layer.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of a cork-like flooring material according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the same cork-like flooring material, and Figs. 3 and 4 each show the necessity of providing a balance layer. It is a figure showing the state of outward curvature and inward curvature. 10 is a base layer, 20 is a surface layer, 30 is a protective layer,
100 is a cork-like flooring material, and F is a cork-like pattern.

Claims (1)

[Claims] 1 Mix 50 to 80 parts of plasticizer and 50 to 150 parts of calcium carbonate to 100 parts of polyvinyl chloride to make 1.5 to 4
A surface layer made of a synthetic resin film with a cork-like pattern printed on it is laminated on a base layer made of double-expanded foam, and a protective layer made of a transparent synthetic resin film is placed on top of this surface layer. Cork-like flooring made of laminated layers.