JP2509735B2 - Patterned sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a synthetic resin sheet containing dispersed titanium dioxide-coated mica, and more specifically, the pigments are oriented in different directions in arbitrary portions of the sheet. The present invention relates to a patterned sheet which is characterized in that a three-dimensional pattern having a shadow is formed by orienting it in a vertical direction, and the color and the pattern slightly change depending on the viewing angle.

[Conventional technology]

As an example of patterning a conventional plastic sheet, a sheet is known in which an inorganic or organic colorant is non-uniformly dispersed in a resin to form a so-called marble pattern or the like.
With this method, the pigment absorbs some of the white light that is emitted,
The color is obtained by selective absorption such as transmission though other parts are reflected, but the color of the plastic surface is artificial, giving a flat and flat color and only a monotonous feeling.

It is also common and common to use a technique such as printing, for example, gravure printing, offset printing, or the like, to give a character or photograph in multiple colors on the surface of a plastic to give a pattern or design. By using this printing technology, it is possible to freely attach a pattern on the surface of plastic, and the amount of information displayed is enormous. However, the pattern has no depth of color and has a poor three-dimensional effect.

Therefore, recently, a method of controlling light to enhance the design is used in order to give this three-dimensional effect. For example, by arranging finely and irregularly on the surface, the part where the light is reflected and the part which becomes a shadow are conscious. It is created in and has an effect. Alternatively, metals such as aluminum, gold, silver, etc. are vapor-deposited on the surface, or they are made to have a partial gloss by printing as particles with an appropriate vehicle, or they appear three-dimensional by using light interference like holograms. The method is becoming popular.

On the other hand, titanium dioxide-coated mica, a so-called pearl pigment, is also commonly used as a printing ink these days, and a three-dimensional effect is expressed by printing that changes color depending on the viewing angle, but it is completely given in terms of depth and depth. Not not.

Further, a sheet in which the pearl pigment is kneaded into a resin is also known, and is disclosed in, for example, JP-A-58-59079 and JP-A-62-1.
No. 01676 can be cited, but both of them focus only on colors such as metallic luster and iris color, and by changing the orientation direction of the pigment, which is the purpose and effect of the present invention, at any part. However, there is no description or suggestion that a three-dimensional pattern having a shadow is formed and that the pattern changes depending on the viewing angle.

Designs are indispensable in various fields such as home appliances, furniture, interiors, and automobiles, and they are elements that appeal to the human sense of the material's image, texture, and shape. Regarding visual sense, which is said to have the largest amount of information among human senses, efforts are being made to differentiate it from others, and there is a demand for plastic sheets with a more sophisticated design.

[Problems to be Solved by the Invention]

An object of the present invention is to provide a plastic sheet in which a pattern which cannot be produced by a technique such as printing, particularly a material itself, has an improved design effect in terms of color and pattern.

[Means for solving the problem]

That is, in the present invention, titanium dioxide coated mica is dispersed in a transparent resin and molded into a sheet, and the axis perpendicular to the plate surface of the scaly mica is in the same direction in any unit portion of the plane direction of the sheet. The patterned sheet is characterized in that adjacent unit parts are dispersed so that the axial directions thereof are different from each other.

The transparent plastic according to the present invention may be processed into a film sheet regardless of whether it is crystalline or amorphous.
For example, olefin resin such as polyvinyl chloride (PVC), polypropylene, polyethylene, polyester (PET, P
Examples thereof include ETG), polycarbonate (PC), acrylic resin such as polyacrylonitrile (PAN) or polymethylmethacrylate (PMMA), and transparent resin such as polystyrene (PS).

Using this resin as a vehicle, scaly mica coated with titanium dioxide in a thin film is dispersed. The titanium dioxide referred to herein may be rutile type or anatase type, and the thickness thereof is preferably 30 to 500 mμ. The rutile type is preferable for providing weather resistance.

The scaly mica is preferably the one obtained by a wet method in which the surface of the muscovite which is the most colorless and transparent is obtained, but it is not specified in the present invention, and its thickness is 0.05.
The size is preferably to 2.0 μm, and the size is preferably 10 to 200 μm. The coating method is not specified here, but in general, titanium dioxide hydrate is used for coating, and
Roast at ℃ and crystallize.

Examples of the method for producing a plastic sheet include an extrusion method, a pressing method, a calender roll method, a stretching method, and the like. In this case, any method may be used. However, if the titanium dioxide-coated scaly mica is crushed into fine pieces during the manufacturing process, the strength of color development will be weakened and it will be very difficult to orient it. Further, if the pigment is uniformly oriented in the same direction, the strength of color development, that is, the saturation is increased, but the pattern for the purpose of the present invention does not occur and a uniform metallic luster color is formed. It becomes a sheet. The degree of kneading must be shallow in order to give this gloss unevenness, more specifically, in order to orient in the same direction in arbitrary unit portions and in different directions in adjacent unit portions. Further, if the degree of kneading is merely shallow, the directions of the pearl pigments are different from each other, and the sheet does not even have a yellowish white metallic luster. This is a phenomenon caused by diffuse reflection of the light reflected by the pearl pigment, and does not appear as a pattern unless the pearl pigment is partially oriented.

[Work]

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic sectional view showing a patterned sheet of the present invention. (The size of the pigment is exaggerated to aid understanding.) As shown in FIG. 1, the patterned sheet of the present invention comprises a transparent resin 1 and a titanium dioxide-coated mica (pearl pigment) 2 in the resin. It is dispersed. As shown in FIG. 2, the pearl pigment 2 is in the form of scales, and the axis 3 in the direction perpendicular to the plate surface
However, in the unit parts 4 and 5 of FIG. 1, the parts are oriented in the same direction, and the parts 4 and 5 are aligned.
Then they are facing different directions. 3 and 4
The figure is a distribution schematic diagram showing the angle formed by the axis 3 of the unit portion 4 and the unit portion 5 perpendicular to the plate surface of the pearl pigment with respect to the thickness direction of the sheet, and the number of the pearl pigment. Of course, the narrower this distribution is, the clearer the pattern will be. The pearl pigment 2 including the unit portion 4 and the unit portion 5
The difference in the direction of the reflected light is the difference in the direction of the reflected light, and this looks like a pattern, and the pearl color is visible or invisible due to the difference in the incident angle of the light and the viewing angle, or the pattern is marked by the intensity of the color. appear.

The content of titanium dioxide-coated mica contained in the sheet is 0.1 to 2.0 hpr with respect to 100 parts by weight of the transparent resin. If it is less than 0.1 phr, the pearl effect does not occur and the pattern does not appear. On the other hand, if it is more than 2.0 phr, the color of the pearl pigment itself, that is, the yellowish white color of the coated titanium will be overcome, the pearl color will be erased, and the patterning will be reduced, resulting in a sheet with a good overall appearance.

The above is also related to the thickness of the sheet, and the product tw of the sheet thickness t [m / m] and the content rate of the pearl pigment W [phr] is preferably in the range of 0.1 to 2.0 and smaller than 0.1. Also, even if it is larger than 2.0, the pattern disappears as described above.

On the other hand, other pigments, dyes, etc., such as coloring pigments, carbon fibers, aluminum flakes, iron oxides, etc. may be used in small amounts together to enhance the effect of pearl color or control the patterning.

Further, the back surface of the patterned sheet of the present invention may be subjected to color printing, pattern printing, or the like, or a colored sheet may be attached, or a pattern printed sheet may be attached to the colored sheet to enhance the effect of the pattern. It is also possible to combine with a printed pattern to produce a three-dimensional effect.

Conversely, even if the surface of the patterned sheet of the present invention is printed, the same effect can be obtained.

In addition to the transparent plastic as a composition, necessary stabilizers, antioxidants, lubricants, reinforcing agents in the sheet manufacturing process,
Additives such as a plasticizer and an ultraviolet absorber may be added, but any additives that do not significantly impair the transparency may be used.

〔Example〕

Composition Straight PVC with an average molecular weight of P = 700 (SX-7G manufactured by Sumitomo Chemical) 100 parts by weight Sn stabilizer (KS-2000GS manufactured by Kyodo Chemical) 1 part by weight Epoxidized soybean oil (made by ADEKA ARGUS, O-130P) 2 parts by weight Soluble agent (manufactured by Dainippon Ink and Chemicals, ATBC) 4 parts by weight Lubricant (manufactured by Ciba Geigy, wax OP) 0.2 parts by weight Lubricants (manufactured by Kao, Kaowax # 220) 0.4 parts by weight Reinforcing agent (manufactured by Kanegafuchi Chemical, Kaneace B-22) 7 parts by weight Pearl pigment (Merck & Co., Iriodin 235) 1 part by weight With the above composition, kneading is performed for 3 minutes at a roll temperature of 170 ° C. using a simple two-roll mill, A sheet was prepared and pressed to obtain sheets having a thickness of 0.1 m / m and 1 m / m. A sheet with a thickness of 0.1 m / m has a transmittance of 70%, and a sheet with a thickness of 1 m / m has a transmittance of 10%.
m, a sheet with a cloudy, fluffy pattern was obtained at a unit of about 10 m / m in the large part.

〔The invention's effect〕

The present invention is a sheet in which a titanium dioxide-coated mica is dispersed in a transparent resin, in which the pigments are oriented in different directions in arbitrary portions, and the three-dimensional shape in which the color and shade change depending on the viewing angle. It is possible to obtain a patterned sheet that forms a realistic pattern.

The sheet of the present invention has a pattern on the sheet itself, and since it is a pattern rich in depth and three-dimensionality that cannot be obtained by the printing method, it is mainly used for decoration, such as wall material, floor material, furniture surface material, etc. For construction, or for displays such as advertisements, signs, and information boards, or for tapes, labels, stickers, or miscellaneous goods, stationery, sports goods, or gifts such as cartons, boxes, wrappings, members' cards,
It can be used for various applications such as overlay films such as ID cards or core materials.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a patterned sheet of the present invention, FIG. 2 is a schematic view of a pearl pigment, and FIGS. 3 and 4 are respectively on the plate surface of the pearl pigment of the unit parts 4 and 5 of FIG. FIG. 7 is a distribution diagram of the angle and the number formed by the vertical axis 3 with respect to the sheet thickness direction.

Claims (1)

(57) [Claims] 1. A titanium dioxide-coated mica is dispersed in a transparent resin and molded into a sheet, and the axis of the scaly mica perpendicular to the plate surface is in the same direction in any unit portion in the plane direction of the sheet. The adjacent unit parts are dispersed so that the axial directions thereof are different from each other, and the content of the titanium dioxide-coated mica is 0.1 phr to 2.
A patterned sheet characterized in that the product tw of the sheet thickness t [m / m] and the titanium dioxide-coated mica content W [phr] is in the range of 0.1 to 2.0 in the range of 0 phr.