JPS62127225A - Manufacture of vinylchloride floor tile - Google Patents

Abstract

PURPOSE:To fabricate a vinylchloride floor tile with minute embossed pattern in a short time and consequently enhance its productivity by a method wherein high frequency wave is directed over a silicone embossing die, which covers a transparent vinylchloride layer. CONSTITUTION:First, a plasticizer containing transparent vinylchloride sheet 5, a plasticizer containing transparent printing vinylchloride sheet 4 with marble grain pattern 3 printed on one side thereof, a colored vinylchloride sheet 2 with base color matching the marble grain pattern and a black reprocessed vinylchloride sheet as a base material vinylchloride sheet 1 are piled up from above in the order named. Secondly, an embossing die 8, for the contouring by which high frequency molding silicone resin is employed, is put upon said topmost transparent vinylchloride sheet 5. In addition, a silicone resin embossing die 9 (for back embossing) is placed beneath the base material vinylchloride sheet 1. Embossing is performed by directing high frequency wave from above the upper and lower embossing dies 8 and 9. Thus, a vinyl chloride floor tile, in which the marble grain pattern and the embosses are made into an integral body, is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for manufacturing PVC floor tiles used as flooring materials in stores and the like.

(Prior art) There are various types of PVC floor tiles, each with different manufacturing methods, but the ones closest to the present invention include base PVC sheets, colored PVC sheets, patterned PVC sheets, and transparent PVC sheets. There is a method in which the sheets that make up a PVC floor tile are stacked in the order of their composition, and the top transparent PVC sheet is embossed using a heat-resistant metal embossing plate using a hot-cold thermopress press, and each sheet is laminated at the same time.

(Problems to be Solved by the Invention) In the above-mentioned conventional technology, a heat-resistant base must be manufactured by cutting metal, so the m-type is expensive and has an old pattern. is difficult,
In addition, we present a method for producing PVC floor tiles that can be produced at low cost and in a short time with a mulberry embossed pattern that takes time to form and has low productivity due to hot-cold embossing.

(Means for Solving the Problems) The structure of the present invention for solving the above problems is characterized in that a transparent PVC layer on the surface is covered with a silicon embossing mold, and embossing is performed by irradiating high frequency waves. This is a method for manufacturing PVC floor tiles.

The present invention will be explained in detail below. Under the transparent PVC sheet on the surface, pattern layers, colored PVC sheets, base PVC sheets, etc. are laminated in order as necessary, and natural stone, wood, etc. is used as an original material and high-frequency molding is performed on the transparent PVC sheet on the surface. An emboss mold made by molding a male mold and a female mold with silicone resin is placed on the mold, and after irradiating high frequency waves with a high frequency molding machine to form an emboss, the embossing mold is released.

The transparent PVC sheet and the sheets to be laminated thereunder may be pasted together in advance, or may be laminated simultaneously during high-frequency molding. Furthermore, if necessary, a silicone embossing mold can also be placed on the front surface of the laminated sheets to form an embossing pattern on the back surface.

The transparent PVC sheet on the surface has a thickness of 0.2 to 0.4 mm and contains 10 to 30% by weight of a plasticizer.

Preferably, one having a thickness of 0.3 mm and containing 20]i31% of plasticizer is used.

Further, the printing layer may be printed on the surface of the transparent PVC sheet by pack printing, or may be printed on a printing PVC sheet and laminated under the transparent PVC sheet. When using a PVC sheet for printing, use a transparent PVC sheet for pack printing, and a colored PVC sheet for front printing, both with a thickness of 0.05 to Q2 mm.
A material containing 10 to 30% by weight of a plasticizer is used.

General PVC ink can be used as the printing ink, but it is necessary to consider weather resistance, reaction with chlorine, etc. In addition, any desired pattern such as stone grain, abstract pattern, or wood grain can be used as the pattern, and the printing method can be general methods such as gravure, offset, flexo, and silk printing.

Further, the colored PVC sheet has a high filler content, high specific gravity, and a thickness of about 0.6 to 0.8 mm. The base PVC sheet also has high filler and high specific gravity, and the thickness is 1.0 to 2.0 m.
It is also possible to use recycled PVC, which is usually colored black. Here, (・Height specific gravity means 1.8 or more (・, about 1.8 to 1.9.) High specific gravity means that there is more filler content, and the dimensional stability is improved accordingly. , suitable as a raw material.

High frequency molding) varies depending on the molding area, but if the area is about 70 cm square and 3 mm thick, the high frequency output will be 50
It can be molded using something with a maximum input of about 90kvA. The molding time is about 15 to 60 seconds, and then the camellia is cooled for about 30 to 60 seconds, and the embossing mold is released.

(Function) By irradiating high frequency waves, embossing can be performed without the need to apply high heat, so silicone resin can be used for embossing molds.

Therefore, even a small pattern can be easily molded from a document at room temperature and pressure, and it is also inexpensive. Therefore, since a large number of molds can be used, the operating rate during production can be maintained at a high level even if the cooling time is sufficient.

Furthermore, high-frequency molding reduces both molding time and cooling time, so productivity can be increased.

(Example) An example of the present invention will be explained according to the drawings.Thickness: 0.35
mm, transparent PVC sheet (5) containing 20% by weight of plasticizer,
A transparent printing PVC sheet (4) containing 20% by weight of plasticizer with a thickness of 0.05 mm is printed with a granite pattern (3) by gravure printing using PVC ink, and has a thickness of 0.05 mm. A colored PVC sheet (2) with a thickness of 6 mm and a specific gravity of 1.85 that matches the base color of the stone pattern, and a base PVC sheet (1) with a thickness of 2. A black recycled PVC sheet having a specific gravity of 1.85 mm and a specific gravity of 1.85 was stacked on top in the above order. Next, a granite embossed mold (8) made using silicone resin for high-frequency molding (RE-200, manufactured by Sansui Vinita) is placed on the transparent PVC sheet (5) on the above surface, and then the base material is Place a silicone embossing mold +91 (for back embossing) under the PVC sheet (1), and use a high frequency molding machine (RE-35000T).
Emboss molding was performed using high-frequency irradiation using a plastic press (manufactured by Sansui Vinita). Molding time is 30 seconds and further cooling (water cooling)
After doing this for 30 seconds, the embossing molds (8) and (9) were released.

As a result, the surface of the transparent PVC sheet is covered with granite '41L.
The elegant stone pattern embossment (6) is applied to the base salt sheet (1).
) was formed with a back embossing (7), and four layers of PVC sheets were simultaneously laminated to obtain a PVC floor tile in which the granite grain pattern and the embossing were integrated.

(Effect of the invention) iron ■A silicone embossed mold can be used, making it more durable. Embossed foods can be formed easily and inexpensively.

■Silicone embossing molds can be molded from natural wood or stone with good reproducibility, making it possible to obtain PVC floor tiles that combine the printed pattern with the embossing on the surface.

■Both molding time and cooling time are short, and mold costs are low, so productivity can be improved.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the manufacturing method of the present invention, which is in a state of embossing molding. (11...Base material PVC sheet (black recycled PVC sheet) (
2)・-Colored PVC sheet (3)・-Stone pattern (4)・
-Printing PVC sheet +51-・Transparent PVC sheet on the surface (
61, - Stone pattern embossing on the front side (7) - Embossing on the back side (8) - Emboss mold for the front side (9) - Membosu for the back side Applicant: Toppan Printing Co., Ltd. Representative Kazuo Suzuki Figure 1

Claims (1)

[Claims] A method for manufacturing PVC floor tiles, which is characterized by covering a transparent PVC sheet with a silicone embossing mold and embossing it by irradiating it with high frequency.