JPS6012222B2 - Method for forming patterns on polyvinyl chloride sheets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of forming a pattern on a polyvinyl chloride sheet, and more specifically, the present invention relates to a method of forming a pattern on a polyvinyl chloride sheet. The gist of this is to form a pattern with a constant height of 2.

An embossing method, a pressing method, a casting method, and the like are known as methods for forming unevenness or a planar pattern on the surface of a thermoplastic resin sheet such as polyvinyl chloride. However, even if a pattern is formed on the surface of a thermoplastic resin sheet by these two methods, if the resin sheet is subsequently heated to a temperature higher than the molding temperature, the pattern tends to disappear, resulting in the final product losing its shape. It was extremely difficult to leave a pattern without any blemishes. The present invention solves the practical drawbacks recognized in the conventional methods of forming patterns on thermoplastic resin sheets, particularly polyvinyl chloride sheets, as described above, and allows a pattern to be formed on the surface of the sheet without deformation. is its main purpose.

Another main object of the present invention is to produce polychlorinated polychloride that can be used as a heavy-duty flooring material, which has a pattern with excellent surface smoothness through a relatively small number of steps, and the pattern forms part of the sheet thickness. The aim is to find new technical means of producing vinyl sheets.

The object of the present invention is to provide a method for forming a pattern on a polyvinyl chloride sheet, which comprises a first polyvinyl chloride sheet and an inorganic filler whose weight is equal to or more than three times the weight of the resin component. A step of overlapping and fusing a second polyvinyl chloride sheet containing a polyvinyl chloride agent, and a step of superimposing and fusing a second polyvinyl chloride sheet containing a polyvinyl chloride sheet, and a step of overlapping and fusing a second polyvinyl chloride sheet to form a depression from the surface of the first polyvinyl chloride sheet toward the second polyvinyl chloride sheet. After the step of embossing the sheet and filling the recess with polyvinyl chloride resin paste, removing the excess polyvinyl chloride resin paste from the surface of the first polyvinyl chloride sheet using a doctor knife. This can be advantageously achieved industrially by employing the method described above, which comprises the steps of heating and gelling the polyvinyl chloride resin paste in the depression. The method of the present invention will be described in detail below with reference to the accompanying drawings.

In the drawings, FIG. 1 is an explanatory diagram showing the connection of steps suitable for carrying out the method of the present invention. Further, Fig. 2 is a longitudinal cross-sectional view of the fusing sheet with depressions formed therein, Fig. 3 is a longitudinal cross-sectional view of the fusing sheet immediately after removing excess polyvinyl chloride resin paste, and Fig. 4 is a longitudinal cross-sectional view of the fusing sheet immediately after removing excess polyvinyl chloride resin paste. FIG. 2 is a longitudinal cross-sectional view of a patterned polychlorinated pinyl sheet produced by the method of the present invention. In these drawings, a first polyvinyl chloride sheet 20 and a second polyvinyl chloride sheet 30 containing an inorganic filler whose weight is equal to or more than 3 times the weight of the resin component
are fed under heat in a superimposed manner between the force render roll 12 and the embossing roll 10 and fused to form a single sheet of material, while at the same time the first sheet 20
A depression is formed from the surface Z toward the second sheet 30'. In carrying out the present invention, the welding step and the depression forming step can alternatively be performed as separate processes, but in this case, the first and second sheets are overlapped and fused together, and then the depression is formed. It is desirable to supply it to the process.
In order to form a resin paste surface that is substantially at the same height as the surface of the first sheet 20 in the final product, it is desirable to adjust the depth of the depressions in advance. During formation, the first sheet 20 is indented into the second sheet 30, and as shown in FIG.
The height of the surface protrusions of the embossing roll 10 is selected so as to account for the above. Note that the inorganic filler in the present invention refers to an inorganic filler that can be blended into polyvinyl chloride resin such as calcium carbonate, clay, and shirasu balloon.
Among them, calcium carbonate is most suitable.

The fused sheet material moving in the direction of the arrow in FIG. The excess amount of the resin paste is removed by a doctor knife 16 that scrapes off the resin paste 40 applied to the surface of the sheet 20. At this time, the appropriate elasticity of the sheet material and the doctor knife By adjusting the contact pressure, a resin paste surface that is slightly lower than the surface of the first sheet 20 is formed as shown in FIG. In order to form such a lowered resin paste surface, the thickness of the first sheet 20 is set to 0.2 mm, and the thickness of the second sheet 30 is set to 1.8 mm.
The embossed roll was added so that the total thickness of the first and second sheets was 2 layers and 3 layers, and the depth of the depression was 0.2 layers and 0.8 layers. It is desirable to select the shape and pressure of the pressure part.The fused sheet from which the excess resin paste has been removed is heated to the heater 18 with the appropriate amount of resin paste 40 filled in the recess.
and heated to gelling temperature. By this heating, the resin paste is completely solidified to form a resin paste surface substantially at the same height as the surface of the first sheet 20, as shown in FIG. In the practice of the present invention, the first and second polyvinyl chloride sheets 20 and 30 and the resin paste four layers are provided with a resin paste surface that is substantially flush with the surface of the first sheet 20 in the final product as described above. In order to form a The gelling temperature in the process is also adjusted.

Further, when the patterned sheet material produced according to the present invention is used as a flooring material, for example, the resin paste 40 filled portion and the first sheet material 20 and/or the second sheet material excluding the resin paste filled portion 30 may be desired to have a different color, and for this purpose, it is desirable to adjust the color of the pigment blended into the resin paste and the first and/or second sheet material. Hereinafter, the method of the present invention will be explained by examples, but the gist of the present invention is not limited in any way by these examples. (Example) DOP for the weight part of PVCIO with an average degree of polymerization of 1000
40 parts by weight of epoxy plasticizer, 3 parts by weight of stabilizer, 1 part by weight of solvent, 40 parts by weight of calcium carbonate, and 0.5 parts by weight of light green pigment. A first PoIJ vinyl chloride sheet of 0.5 fence was made.

In addition, a resin composition having the same composition as above except that the weight ratio of calcium carbonate was changed to 19 parts by weight to 19 parts by weight of PVCIO was used to obtain a thickness of 2. A second PVC sheet of Vengeance was created. On the other hand, polypynyl chloride resin base
As a sample, an emulsion-polymerized PVC composition was prepared by blending 50 parts by weight of DOP, 3 parts by weight of a Ba-Zn stabilizer, and 0.4 parts by weight of a dark green pigment to parts by weight of PVCIO blood, and was supplied into the hopper. The first polyvinyl chloride sheet and the second polyvinyl chloride sheet are fed to a calender roll in an overlapping state with the first polyvinyl chloride sheet positioned on the upper side, and are pressurized at a heating temperature of 1820°C. It was fused together as an integral sheet material.

The sardinized sheet material is then fed to an empos roll and heated and pressed at 185°C to create a depression corresponding to 70% of the thickness of the first sheet from the surface of the first sheet to the second sheet. After that, the polyvinyl chloride resin paste was filled into the cavity. Next, a doctor knife is pressed against the surface of the first sheet to remove excess resin paste and form a resin base surface that is slightly lower than the surface of the first sheet, and then the sheet material is placed in a heater. The resin base filled in the cavity was gelled by supplying V to 17,500 and heating to 17,500 °C. As a result, the final product had a resin paste surface substantially at the same height as the first sheet surface as shown in FIG. As can be easily understood from the above description, the method of the present invention has excellent utility as a technical means capable of producing polyvinyl chloride sheets having a substantially smooth patterned surface under stable operating conditions. There is.

In addition, by changing the emboss shape and the color of the resin component, various patterns can be formed on the surface of the sheet material, which has the advantage that the pattern-forming portion has high peeling resistance, as well as the use of the final product. It can also greatly contribute to expansion.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a process illustrating the method of the present invention, Fig. 2 is a longitudinal cross-sectional view of a fused sheet with depressions formed, and Fig. 3 is a longitudinal cross-sectional view of an adhesive sheet immediately after removing excess resin paste. FIG. 4 is a longitudinal cross-sectional view of a patterned polyvinyl chloride sheet produced by the method of the present invention. 20: First polyvinyl chloride sheet, 30: First polyvinyl chloride sheet, 21: Invaginated portion 40: Polyvinyl chloride resin paste. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A method for forming a pattern on a polyvinyl chloride sheet,
a step of overlapping and fusing the first polyvinyl chloride sheet and a second polyvinyl chloride sheet containing an inorganic filler whose weight is equal to or more than three times the weight of the resin; Embossing the fused sheet to form a depression from the surface of the second polyvinyl chloride sheet to the second polyvinyl chloride sheet, and filling the depression with a polyvinyl chloride resin paste. After that, a step of removing the excess polyvinyl chloride resin paste from the surface of the first polyvinyl chloride sheet with a doctor knife, and a step of heating and gelling the polyvinyl chloride resin paste in the recesses. The method characterized in that: