JPH07364B2 - Tile carpet - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tile carpet using a non-foaming and foaming polyvinyl chloride paste resin as a backing layer applied to the back surface of a carpet as two inner and outer layers.

[0002]

2. Description of the Related Art A tile carpet usually has a side length of 30 to 30.
Since it is used as a 100 cm square, it is widely used because it is light and easy to carry and easy to install, and it can be partially replaced and repaired. When laying with the edges butted against each other, they must be in close contact with each other so that they do not overlap, and also have flexibility as a whole, and the stability of the shape and dimensions is required so that they do not warp or stretch vertically and horizontally. Usually, a backing layer having a thickness of about 2 to 5 mm is applied.

For the backing layer of the above tile carpet, there have been often used those having two layers of polyvinyl chloride as the inner and outer layers with a non-stretchable glass fiber non-woven fabric or cloth interposed therebetween. When using polyvinyl chloride as the inner and outer two layers for the backing layer, the inner and outer two layers are both non-foamed, or both of the inner and outer layers are foamed, and either one of the inner and outer layers is used. It is known that the non-foamed and the other is foamed. Incidentally, the above-mentioned foaming is conventionally made to have a magnification of 2 to 3 times.

[0004]

By the way, as described above, if neither of the inner and outer backing layers of the tile carpet is foamed, the weight reduction cannot be expected even though the form and dimension are stable. Further, if the inner and outer layers are foamed together, unevenness may occur after drying, and a fuzzy phenomenon, which is a cause of reduced yarn removal strength and fuzz, may occur, and problems such as easy peeling of the carpet adhered to the upper surface may occur. Moreover, even when the inner layer of the two layers is foamed, the same problem as the latter is caused. Further, even if the outer layer of the backing layer foams the foam, if the foaming ratio is high as in the conventional case, the stability of the shape is impaired.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a lightweight carpet by making the inner layer of the carpet wadding non-foaming in the two layers of polyvinyl chloride paste resin used for the backing layer of the tile carpet, while making the outer layer of the wadding low foaming. It is therefore an object of the present invention to provide a tile carpet that is easy to carry and is easy to install, and that is free from peeling and warping of the upper surface carpet, and that can be easily installed by correctly abutting the peripheral edges.

[0006]

That is, the tile carpet according to the present invention is a tile carpet in which a backing layer having a polyvinyl chloride paste resin as a main material is laminated on the back surface of a carpet in two layers, an inner layer and an outer layer, with a glass fiber cloth interposed at least in the middle. The inner layer in the two backing layers is non-foamed, while the outer layer is chemically foamed at a foaming ratio of 1.05 to 1.4 times.

The non-foaming of the inner layer in the inner and outer two-layered backing layer mainly composed of the polyvinyl chloride paste resin is combined with the presence of the intermediate glass fiber cloth to form and size the entire tile carpet. This is because the yarn removal strength is increased and the peeling of the carpet and the occurrence of the fuzzy phenomenon are suppressed, in addition to contributing to the stability of the above. In addition, the outer layer of the backing layer is chemically foamed at a low foaming ratio of 1.05 to 1.4 times to provide a volume necessary for the backing layer to reduce the cost of the tile carpet and to reduce weight and flexibility. This is because the backing layer, which is more than twice as high foaming as the conventional one, can use only a small amount of calcium carbonate, and when the foaming layer is formed by chemical foaming, the coating amount before foaming can be increased. Since unevenness in thickness will occur due to partial differences, most of them were due to mechanical foaming, which requires high equipment costs, and it is difficult to form a uniform coating film due to increase in viscosity, size of bubbles, etc. In the invention, since the foaming is low, it is possible to use the chemical foaming without the above-mentioned harmful effects.

That is, according to the present invention, the expansion ratio of the polyvinyl chloride paste resin as the outer layer is increased in order to maintain the overall shape and size of the tile carpet while maintaining the characteristics of the tile carpet such as weight reduction and flexibility. Compared to the past, it is kept low.

[0009]

EXAMPLES Examples of the present invention will be described below.

In FIG. 1, reference numeral 1 denotes a tile carpet, and the surface fiber material 2 in this tile carpet 1 is
Although the tufted carpet in which the pile yarn 2b is planted in the base cloth 2a is shown, the surface fiber material 2 may be a needle punch carpet, a Wilton carpet, or a knit carpet. 3 and 4 are non-foaming and foaming polyvinyl chloride (PVC) layers as a backing layer adjusted with the following compositions, and 5 and 6 are interposed between the polyvinyl chloride layers 3 and 4. The glass fiber cloth (fabric or non-woven cloth) and ester cloth.

In the tile carpet, first, a polyvinyl chloride foam layer 4 having a coating thickness of 1.25 mm is coated on a release sheet (belt), and an ester cloth 6 is coated thereon.
Then, a glass fiber cloth 5 is laid in order, and a polyvinyl chloride non-foaming layer 3 having a thickness of 1.5 mm is further applied on the glass fiber cloth 5 and the tufted carpet 2 is superposed on the upper surface thereof.
A backing layer having a thickness of 3.0 mm is laminated by passing the mixture through a heating zone (not shown) at 85 ° C. for 15 minutes to chemically foam the foamed layer 4 at a foaming ratio of 1.2 times, and after cooling, form a square of 50 cm square. It was cut to make a tile carpet 1 having a thickness of 6.5 mm. The ester cloth 6 has a thickness of 0.2 mm and a basis weight of 20 g / m in order to prevent the backing layer from stretching due to an external force.
^The glass fiber cloth 5 is for improving the dimensional stability, and is preferably a non-woven cloth having a thickness of 0.3 mm and a weight of 40 g / m ² .

Polyvinyl chloride foam layer composition (foaming ratio 1.2) (parts by weight) Polyvinyl chloride paste resin 100.0 Plasticizer (DOP) 100.0 Calcium carbonate "G # 60" (Sankyo Flour Milling) 400. 0 Antifoaming agent "CML # 31" (Omi Chemical Industry Co., Ltd.) 5.0 Thermal stabilizer "W-O-SC" (resino color) 2.0 Pigment "VT-SO-21" (resino color) 2.0 Chemical blowing agent ADCA 0.6 OBSH 0.6 Total 610.2

Composition of polyvinyl chloride non-foaming layer (parts by weight) Polyvinyl chloride paste resin 100.0 Plasticizer (DOP) 100.0 Calcium carbonate "G # 60" (Sankyo Flour Milling) 300.0 Antifoaming agent "CML"# 31 "(Omi Chemical Industry Co., Ltd.) 5.0 Thermal stabilizer" W-O-SC "(resino color) 2.0 Pigment" VT-SO-21 "(resino color) 2.0 Total 509.0

"Comparative Example 1" (1.2 times foaming both inside and outside) Polyvinyl chloride prepared by the following composition (A) was applied on a releasable sheet (belt) to a coating thickness of 1.25 mm. Ester cloth (0.2mm thickness 20
g / m ² ), glass fiber cloth (thickness 0.3 mm, weight 40 g
/ M ² ) and further coated with polyvinyl chloride adjusted with the following composition (B) at a coating thickness of 1.25 mm, and finally with a tufted carpet overlaid, from the back surface at 185 ° C. Heat was passed for 15 minutes to chemically foam the vinyl chloride to laminate a backing layer to make a tile carpet having a thickness of 6.5 mm.

Composition of Comparative Example 1 (parts by weight) (A) (B) Polyvinyl chloride paste resin 100.0 100.0 Plasticizer 100.0 100.0 Calcium carbonate 400.0 300.0 Bubble preventer 5. 0 5.0 Thermal stabilizer 2.0 2.0 Pigment 2.0 2.0 Chemical blowing agent (foaming ratio 1.2) ADCA 0.6 0.6 OBSH 0.6 0.6 Total 610.2 510.2

"Comparative Example 2" (both inner and outer layers are non-foamed) In Comparative Example 2, the chemical foaming agents (ADCA, OBSH) were removed from the compounding ingredients (A) and (B) shown in Comparative Example 1 respectively. In the state where the tufted carpet was finally overlaid with the ester cloth and the glass fiber cloth having the same contents as in Comparative Example 1 interposed between the inner and outer layers of polyvinyl chloride to be applied with each coating thickness of 1.5 mm adjusted to be the same as the others. 185 ° C from the back
The backing layer is laminated by passing the heat of 15 minutes for a thickness of 6.5
Made a mm tile carpet.

"Comparative Example 3" (non-foaming inner layer / double-foaming outer layer) Polyvinyl chloride prepared by the following composition (A ') was coated on a release sheet (belt) to a coating thickness of 0.75 mm, Polyester chloride prepared by the following composition (B ') was further applied thereon via an ester cloth having the same contents as in Comparative Example 1 and a glass fiber cloth, and a thickness of 1.5 mm.
In the state where the tufted carpets are superposed on each other, heat of 185 ° C. is passed from the back surface for 15 minutes to chemically foam the polyvinyl chloride of the above-mentioned (B ′) composition (foaming ratio 2
By doubling), a backing layer was laminated to make a tile carpet having a thickness of 6.5 mm.

Composition of Comparative Example 3 (parts by weight) (A ′) (B ′) Polyvinyl chloride paste resin 100.0 100.0 Plasticizer 100.0 100.0 Calcium carbonate 400.0 300.0 Bubble preventer 5.0 5.0 Thermal stabilizer 2.0 2.0 Pigment 2.0 2.0 Chemical blowing agent (expansion ratio 2 times) ADCA 2.0 --OBSH 2.0 --total 613.0 509.0

The tile carpets obtained in the above Examples and Comparative Examples 1, 2 and 3 were cut into squares of 50 cm square, and the degree of expansion and contraction was measured by the yarn removal strength of each tile carpet, the fuas, the weight and the length and width dimensions. The results of the physical property comparison test in Table 1 were obtained. The yarn removal strength shown in Table 1 is
A 10 cm square sample of the tile carpet was attached to a holder of a pile yarn pull-out tester, the pile yarn pull-out chuck was used to pinch the pile at five positions, and the maximum load when the pile was pulled out was measured and the average value was shown. Further, the fuzzy test was performed by a standard clothing method (C or less is bad). The air caster is JIS (2102).
Using the equipment of 3), load a tester with a load of 90 kg.
The result of operating 00 times is shown.

[0020]

[Table 1]

[0021]

EFFECTS OF THE INVENTION As shown by the test results of the above-mentioned physical properties of Example and Comparative Examples 1, 2, and 3, the tile carpet according to the present invention is slightly inferior in lightness to Comparative Example 1. In addition, the yarn removal strength is increased, the occurrence of the fuzzy phenomenon is suppressed, and the elongation ratio, which impairs the dimensional and morphological stability, can be kept small as compared with Comparative Examples 1 and 3. With No. 2, even if the thickness of the backing layer is the same, the tile carpet according to the present invention is lightweight because the outer layer is foamed, and is easy to carry.

Moreover, when the tile carpet of the present invention is used, the foaming ratio of the outer layer in the inner and outer two backing layers is 1.
Since it has a low magnification of 05 to 1.4 times, it is possible to perform chemical foaming, and it is possible to maintain the flexibility required for a tile carpet, and the occurrence of warpage as a whole,
Both the inner and outer layers have the advantage that they can be prevented to the same extent as non-foamed ones, and the peripheral edges are in close contact with the floor surface to facilitate the construction.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a tile carpet of the present invention.

[Explanation of symbols]

 2 Tufted carpet 3 Polyvinyl chloride non-foaming layer 4 Polyvinyl chloride foaming layer 5 Glass fiber cloth 6 Ester cloth

Claims (1)

[Claims] 1. A tile carpet in which a backing layer comprising a polyvinyl chloride paste resin as a main material is laminated on two inner and outer layers with a glass fiber cloth interposed at least in the middle of the carpet, and the two backing layers are provided. The tile carpet characterized in that the inner layer in (1) is non-foamed, while the outer layer is chemically foamed at a foaming ratio of 1.05 to 1.4 times.