JPH0745179B2 - Method for producing sheet having excellent three-dimensional pattern - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a sheet having an excellent three-dimensional pattern by imprinting a thermoplastic resin sheet having a concavo-convex pattern further overlappingly. It is a thing.

[Conventional technology]

BACKGROUND ART Conventionally, there is known a method for producing a sheet in which an uneven surface of a thermoplastic resin sheet having an uneven pattern is pressed while being heated so as to melt and deform the convex portion (for example, Japanese Patent Laid-Open Publication No. Sho.
57-89914, JP-A-54-87755).

[Problems to be solved by the invention]

However, in the conventional sheet manufacturing method, since the convex portion is simply compressed while being heated while being heated by the pressure roller, the convex surface is flat and unchanged, and the natural leather or the like is used. It was inferior in terms of tactile sensation and visual, and was not fully satisfactory.

Therefore, an object of the present invention is to provide a method for producing a sheet which solves the above-mentioned conventional problems and can obtain a three-dimensional pattern excellent in texture and feel.

[Means for solving problems]

In the present invention, a releasable film is laminated on the uneven surface of the thermoplastic resin sheet having an uneven pattern. Then, the mold is further overlapped with a heating engraving roll heated to a temperature higher than the mold forming temperature of the thermoplastic resin sheet from above the releasable film, thereby compressing and deforming the convex portion. , An arbitrary pattern is formed on the surface of the convex portion.

[Action]

The method for producing a sheet having an excellent three-dimensional pattern of the present invention is a method of stacking a release film on the uneven surface of a thermoplastic resin sheet having an uneven pattern, and further embossing with a heating engraving roll. Since the convex portion can be compressed and deformed and a desired pattern can be easily formed on the compressed and deformed convex surface, a sheet having a variety of surface patterns can be manufactured.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view for schematically explaining the method of manufacturing the sheet of the present invention, and FIG. 2 is a sectional view of the sheet obtained by the method of manufacturing the sheet of the present invention.

In FIG. 1, reference numeral 1 is a thermoplastic resin sheet as a base material used in the present invention, and although not shown, an uneven pattern is formed on the surface by a known heating embossing method using, for example, a hot press plate or a heat roll. It was formed. FIG. 3 shows a cross section of the thermoplastic resin sheet 1 as the base material.

Reference numeral 2 denotes a back roll which comes into contact with the lower surface of the thermoplastic resin sheet 1 to support the same and guides the movement thereof at the same time, and 3 a heating engraving roll provided at a position facing the upper portion of the back roll 2.
4 is a delivery roll from which the releasable film 5 is delivered. This releasable film 5 is a heating engraving roll 3
To the take-up roll 7 via the peeling guide roll 6. 8 and 9 are the heated engraving rolls 3
A cooling roll for cooling the sheet 1 and the releasable film 5 that have been embossed with, and 10 is a winding roll for the completed sheet.

The heating engraving roll 3 is engraved with an arbitrary pattern such as wrinkles on the outer peripheral surface thereof. Also, heating engraving roll 3
Is for embossing the surface of the convex portion of the thermoplastic resin sheet 1. Therefore, it is necessary to keep the temperature higher than the heating temperature in the molding diagram of the uneven pattern of the thermoplastic resin sheet 1. The temperature difference is preferably at least 10 ° C or higher. If the heating engraving roll 3 has a structure that can move in the vertical direction and the gap between the heating engraving roll 3 and the back roll 2 can be adjusted, the thickness of the compressed sheet can be freely set, which is convenient. .

The releasable film 5 is, for example, a resin film such as polyester, polyamide, or polycarbonate, or a metal foil, which is excellent in heat resistance and releasability. The resin film is preferably as thin as possible, and a polyester film having a thickness of 0.012 mm was used in the present invention.

In order to manufacture a sheet having an excellent three-dimensional pattern by using the above-mentioned apparatus, the thermoplastic resin sheet 1 having a concavo-convex pattern is fed between the heating engraving roll 3 and the back roll 2 and separated onto the concavo-convex surface. The formable film 5 is overlaid and heated and pressed by the heating engraving roll 3 to compress the convex portion. Then, the thermoplastic resin sheet 1 is cooled from the back side by a cooling roll 8, and the release film 5 is cooled by a cooling roll 9 while being peeled from the thermoplastic resin sheet 1 by a peeling guide roll 6 and wound on a winding roll 7. The molded sheet 1 is taken up by a take-up roll 10.

In the sheet thus formed, as shown in FIG. 2, the convex portion of the uneven pattern formed on the thermoplastic resin sheet 1 is compressed and deformed, and the compressed convex portion surface has wrinkles or the like. An arbitrary pattern engraved on the heating engraving roll 3 is formed, and when the deformed convex portion is touched, a rough feel and a soft catch are felt. Therefore, a feeling similar to that of natural leather can be obtained, and in addition, the individual planar shapes of the convex parts are changed intricately to reveal a graceful surface pattern as if clouds were floating, and the convex surface is further formed. A three-dimensional pattern with an excellent texture can be obtained by matching the pattern.

FIG. 4 shows a thermoplastic resin sheet 1 of another embodiment as a base material used in the present invention, in which flocked hair 11 is applied only to the concave portions of the surface thereof having an uneven pattern. As shown in FIG. 5, in the case where the flocked portion 11 is applied to the concave portion as described above, the convex portion embossed portion and the flocked portion are mixed and integrated, and the softness, texture, and tactile feel are excellent. The sheet gives a unique three-dimensional pattern without seeing. As the material of the flocked hair 11, in addition to natural or synthetic short fibers, skin powder, synthetic resin powder, metal powder, etc. can be arbitrarily selected and used. On the back surface of the thermoplastic resin sheet 1, woven cloth, knitted cloth,
By backing a reinforcing material such as a non-woven fabric or a brushed fabric, the entire material has a thickness to add cushioning property and strength, which enables it to be used for various purposes.

Further, according to the manufacturing method of the present invention, the surface pattern of the thermoplastic resin sheet 1 as the base material and the engraving pattern of the heating engraving roll 3 are arbitrarily selected to make the surface patterns of the concave portion and the convex portion different, Due to the contrast of the different surface patterns, it is possible to easily obtain a sheet excellent in three-dimensional color. As an example, by giving gloss to the concave part and giving a grain pattern to the convex part, or by making the concave part and the convex part different in size, depth, etc. of the embossed pattern, there is an unprecedented heavyness and aesthetic appearance. A sheet having an excellent three-dimensional color feeling can be obtained.

Furthermore, according to the manufacturing method of the present invention, it is extremely suitable particularly when a flock is applied only to the concave portions of a thermoplastic resin sheet having a convex and concave pattern in which the surface shape of the convex portions is complicated. That is, according to the conventional method, first, an adhesive is applied to the entire surface, then a doctor knife is slid on the surface to scrape off the adhesive adhering to the surface of the convex portion, and then only the concave portion is flocked. Is. For this reason, if the surface shape of the convex portion is complicated, it is impossible to clean off the applied adhesive, and it remains by all means.
As a result, there is a problem that the flocked material adheres to the surface of the convex portion, which has been considered impossible until now.

Thus, according to the above-described manufacturing method of the present invention, first, the convex surface is embossed in a flat state in which the adhesive can be trimmed, and the concave portions are flocked, and then a desired pattern is formed. The heating engraving roll 3 thus formed is further duplicated to form a complex pattern on the surface of the convex portion. As a result, it is possible to easily manufacture a sheet in which flock is applied only to the concave portions and a desired complicated uneven pattern is formed on the surface of the convex portions. As the heating engraving roll 3, for example, a pattern engraving roll that is in stock can be diverted and used, whereby a wide variety of sheets can be manufactured easily and cheaply.

〔The invention's effect〕

As described above, according to the production method of the present invention, it is possible to continuously produce a sheet that exhibits a novel surface pattern that has never been seen in the past and is excellent in texture, feel, and three-dimensional color feeling. It is possible.

[Brief description of drawings]

The drawings show the embodiments of the present invention. FIG. 1 is a front view for schematically explaining the production method of the present invention, and FIG. 2 is a sectional view of a sheet obtained by the production method of the present invention. Third
The figure is a cross-sectional view of the thermoplastic resin sheet used as the base material,
FIG. 4 is a sectional view of a thermoplastic resin sheet of another embodiment used as a substrate, and FIG. 5 is a sectional view of a sheet of another embodiment obtained by the manufacturing method of the present invention. 1 ... Thermoplastic resin sheet, 3 ... Heating engraving roll, 4
...... Releasable film, 11 …… Flocking.

Continuation of front page (56) Reference JP-A-57-89914 (JP, A) JP-A-54-87755 (JP, A) JP-A-56-154599 (JP, A) JP-A-60-244369 (JP , A)

Claims (2)

[Claims] 1. A heating engraving in which a mold-releasing film is placed on the uneven surface of a thermoplastic resin sheet having an uneven pattern, and the mold release film is heated to a temperature higher than the embossing temperature of the uneven pattern. An excellent three-dimensional pattern is obtained, in which the rolls are further overlapped to perform embossing, thereby compressing and deforming the protrusions and forming an arbitrary pattern on the surface of the protrusions. Sheet manufacturing method. 2. A thermoplastic resin sheet having a concavo-convex pattern in which recesses are provided with flocked hair.
A method for producing a sheet having an excellent three-dimensional pattern as described in the above item.