JPS6069629A - Liquid crystal ornamental body having curved surface - Google Patents

Abstract

PURPOSE:To obtain a liquid crystal body having an excellent ornamental effect by forming successively a liquid crystal film and a resin layer each having a uniform thickness on a flat flexible base plate then deforming thermally the laminate thereof in a way as to have a curved surface and cooling the heated laminate so that elastic recovering force against load deformation at an ordinary temp. is provided to the laminate. CONSTITUTION:An aq. colloidal soln. prepd. by microcapsulating a liquid crystal material of cholesterol of which the color tone can be changed by a temp. change with gelatin or the like is coated with gum arabic as a binder on a flat and flexible base plate 2 consisting of, for example, an acrylic resin plate or thin metallic sheet or the like which softens at 60 deg.C. The coating is then dried to form a liquid crystal film 3. A resin film 4 is then formed on the film 3 by a casting method of one-pack or twin-pack liquid resin such as an epoxy resin, polyester resin or the like. The laminate thereof is vacuum drawn or is wound and fixed to a cylindrical body, etc. having a curved surface and is then formed by heating so as to have a curved surface 1; thereafter the curved laminate is gradually cooled to a room temp. and is then cooled about 0 deg.C in a refrigerator to manufacture the liquid crystal ornamental body having elastic recovering force against load deformation at <=40 deg.C temp. The beautiful ornamental body of which the color tone changes with a change in ambient temp. is thus obtd.

Description

[Detailed Description of the Invention] The present invention uses a liquid crystal that changes its color tone like an animal chameleon due to changes in ambient temperature, and whose color tone changes to a beautiful color like a jewel opal due to the effect of birefringence. It is a decorative item and a display item.

Traditionally, decorative items using this type of liquid crystal include brooches,
There are pendants, necktie bins, etc., but since the surface on which the liquid crystal is formed is limited to a flat surface, the applications are also limited, and it is difficult to go beyond the above-mentioned products.

The reason that the surface on which the liquid crystal is formed is limited to a flat surface is due to the manufacturing process.The liquid crystal film is formed by casting a liquid crystal Floyd liquid and drying it over time, so the surface to be cast is not flat. ,
In addition, if there is a curved surface such as an uneven surface, the fluid liquid crystal colloid liquid will accumulate only in the concave areas, and the liquid crystal colloid liquid will not be retained on the convex surface, and a uniform liquid crystal film with no density will not be formed. .

Furthermore, even if the curved surface is not uneven but gently curved, there will inevitably be an inclination, so the liquid crystal colloid liquid will flow and it will not be possible to form a uniform liquid crystal film with no shading.
In other words, it is the same reason that highly fluid paint cannot be applied to a vertical wall surface.

If it were possible to obtain an article in which a curved KM crystal film was formed with a uniform density, many new applications would arise for decorative items using liquid crystal.

The present invention has been made in consideration of the above points, and an object of the present invention is to form a liquid crystal film uniformly without shading on a portion of a plate-shaped body having a curved surface including the curved surface, The object of the present invention is to provide a decorative body on which a resin layer of uniform thickness is formed by a casting method, and the portion including the curved surface has elastic resilience against deformation under load at room temperature.

The manufacturing method of the curved liquid crystal decoration according to the present invention is to form a uniform liquid crystal film with no shading on a flat substrate by a casting method, and then to form a resin with a uniform thickness on the formed core liquid crystal film by a casting method! - is formed to such an extent that it does not completely solidify, and the laminate consisting of the substrate, the liquid crystal film, and the resin layer is subjected to load deformation and heated while maintaining a curved surface to completely assimilate the resin layer. Allow to harden, then cool at room temperature, then cool to zero degrees Celsius (
It cools down to about 1.

The structure of the present invention will be described below with reference to the drawings shown as embodiments. FIG. 1 is a partially enlarged sectional view of a portion having a curved surface of a curved liquid crystal decoration according to the present invention.

1 is a curved surface, which is a concave or convex surface, or an uneven surface formed by curving, and 2 is a substrate, which is a metal plate or synthetic resin plate with a thickness that is less than the thickness that allows it to be bent or curved. When 2 is made of synthetic resin and the curved surface 1 is formed with irregularities such as letters or patterns by vacuum forming, the load required for deformation is limited, so the thickness becomes thinner than when it is bent or curved.

Here, the substrate 2 having the curved surface 1 is formed by drawing (vacuum forming) or pressing and bending a flat plate with a uniform FJ size, so if the curved surface 1 of the substrate 20 is viewed as a convex surface, its back side will be a concave surface and the thickness of the cross section will be The thickness will be uniform.

Reference numeral 3 is a liquid crystal film, which is formed by drying a colloidal aqueous solution in which a liquid crystal substance such as cholesterol, which changes its color tone with changes in temperature, is microencapsulated with gelatin or the like, using gum arabic, gelatin, or the like as a binder.

"A uniform liquid crystal film 3 with no shading is formed on the curve [Il'i1"] means that the liquid crystal film 3 having a substantially uniform thickness is formed on the curved surface 1.
This does not mean that it is formed on a flat surface other than the curved surface 1, and that it is not formed on a flat surface other than the curved surface 1.

Reference numeral 4 denotes resin J, which is a resin layer formed by casting a liquid resin such as epoxy resin or polyester resin.

"A resin layer 4 of uniform thickness is formed on the surface of the liquid crystal film 3" means that the liquid crystal film 3 is on the substrate 2, the resin layer 4 is on the liquid crystal film 3, and the liquid crystal layer 4 is formed on the surface of the liquid crystal film 3. The membrane 3 is sealed with the substrate 2 and the resin layer 4 in a Zandermanch shape, and the term "on the surface" refers to the surface including the curved surface 1.

A laminate is a state in which a substrate 2, a liquid crystal film 3, and a resin layer 4 are laminated, and "having elastic resilience against deformation under load at a temperature of 40 degrees Celsius or less" means that the curved surface 1 has elasticity at a temperature below room temperature. It is said that even if the laminate containing the laminate is pressed and bent with strong force, it will return to its original shape.

Therefore, it is natural that the laminate, including the curved surface 1, does not easily undergo plastic deformation.

FIG. 2 is a sectional view of a curved liquid crystal decoration according to the present invention in which the substrate 2 is a metal plate and the curved surface 1 is curved.

5 is a base film, which is a black opaque coating film. When the substrate 2 is a chromatic color other than black or has a metallic luster, a black opaque base film 5 is formed on the base film 5, and a liquid crystal film 3 is formed on the base film 5. Finally, a transparent resin layer 4 is formed on this liquid crystal film 3, and when viewed from the side of this transparent resin layer 4, colors other than the body color of the liquid crystal are absorbed by the black base and cannot be seen. It is recognized as a vivid color tone. Conventional liquid crystal decorations, as typified by Brooch Gin, have metal bases and 2, and usually require a black base.

On the other hand, if the substrate 2 is a transparent synthetic resin plate in FIG. 1, and the substrate 2#I is the external surface and the resin layer 4 is black and opaque, the resin layer 4 will be the same as in FIG. This serves as the base film 5 for the purpose of

If the substrate 2 is a black opaque synthetic resin plate, the base thickness 5 can be omitted. In this case, the resin layer 4 side will be the external surface, so the resin layer 4 must be transparent.

The fifth rotation speed from FIG. 3 is an example in which the shape of the substrate 20 before forming the curved surface 1 is a band shape, and the curved surface 1 is formed as a curve.

The shape shown in Fig. 3 can be used as a deflation point for bangles, hair bands, and smaller ones such as cylindrical containers, lids, or round rods.

The one shown in Figure 4 has a spirally wound shape, and can be used as a deflation point for rod-shaped rods, or as a deflation point and temperature sensor for fishing rods, including the one in the shape shown in Figure 3.

FIG. 5 shows a shape in which a band-shaped substrate 2 material is wound in the width direction, and can be applied when the spiral joint shown in FIG. 4 is inconvenient.

Note that the above is a basic example, and the shape of the board 2 may be modified such as a gentle C-shape, S-shape, 2-shape, etc.), curved or 1-shape.
+111 If the method of folding is devised, it is possible to provide products with various final external shapes.

Next, an example will be shown in which the substrate 2 is a transparent acrylic resin plate and the curved liquid crystal decoration according to the present invention is used as a bracelet.

Example thickness: 1 mm, width: 20 mm, length: 170 mm
A liquid crystal film of @14 mm and length of 164 mm was formed on a 341 m transparent acrylic resin plate by casting method, and a black opaque WJ coating was applied to the acrylic resin plate corresponding to the outline of the formed liquid crystal film. After forming the film, completely form the liquid crystal film and cast a transparent epoxy resin on top of the formed liquid crystal film, and heat it at 60 degrees Celsius for 2 hours (usually 3 hours).
, The shape was fixed by wrapping it around a tube with a diameter of 50 mm in an environment of 60 degrees Celsius.Heating it at 60 degrees Celsius for 30 minutes, slowly cooling it at room temperature for 10 minutes, then putting it in the refrigerator and cooling it for 15 minutes at around zero degrees Celsius. After that, take it out and remove it from the tube.
I was able to obtain a bracelet that maintained its given shape.

Here, 60 degrees Celsius is the temperature at which the acrylic resin plate softens, and the temperature that the liquid crystal can withstand.Furthermore, if you omit the process of placing it in the refrigerator, the given shape will return to its original shape after a long period of time. There is a danger.

In the example, for example, if the thickness of the acrylic resin plate is 0.3 mm and the vacuum forming method is applied to fix the shape by wrapping it around a cylinder, the curved surface 1 will not be curved but will have a sag character or a sag pattern. It can be formed as unevenness such as.

As described above (the curved liquid crystal decoration body according to the present invention has a curved surface 1
A liquid crystal film 3 is uniformly formed on the portion including the curved surface 1, and a resin layer 4 of uniform thickness is formed on the liquid crystal layer 3 by a casting method. Since the parts have elastic resilience against deformation under load at room temperature, it can be presented as a product that goes beyond conventional decorative products using liquid crystals.

In addition, if the curved surface 1 is curved, it may be possible to expect a similar effect by pasting a liquid crystal sheet on the already given curved surface. Both the liquid crystal film 3 and the resin layer 4 must be formed by a casting method, especially when trying to form the resin layer 4 on a liquid crystal sheet pasted to place emphasis on appearance. Since the liquid crystal sheet has already formed a curved surface, it is impossible to form the resin layer 4 of uniform thickness as in the present invention.

[Brief explanation of drawings]

The drawings show an embodiment of the curved liquid crystal decoration according to the present invention, and FIG. 1 is a locally enlarged sectional view of a portion having a curved surface, and FIG.
The figure is a cross-sectional view when the substrate is a metal plate and the curved surface is curved and requires a base film. Figure 3 is a cross-sectional view of the substrate in the form of a strip and curved in the longitudinal direction to form a curved surface. Fig. 4 is a perspective view of a substrate in the form of a band and wound spirally to form a curved surface, and Fig. 5 is a perspective view of the substrate in the form of a band and curved in the width direction to form a curved surface. FIG. 1: Curved surface, 2゛Substrate, 3: Liquid crystal film, 4: Resin layer, 5: Base film, Patent applicant Shinwa Seisakusho Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1) A uniform liquid crystal film (3) with no shading is formed on the curved surface (1) of a substrate (2) having a curved surface (1), and on the surface of the liquid crystal film (3) There is a resin layer of uniform thickness (4
) is formed, and the laminate consisting of the substrate (2), the liquid crystal film (3) and the resin layer (4) including the curved surface (1) has a temperature of 4 degrees Celsius.
Curved liquid crystal decoration body characterized by having elastic resilience against deformation under load at a temperature below 0 degrees 2) The substrate (2) is a metal plate, and the substrate (2) and the liquid crystal film G
), a black opaque base film (5) is interposed between the
3) The curved liquid crystal decoration body according to claim 1, wherein the resin layer (4) is transparent; and the substrate (2) is a transparent synthetic resin plate;
4) The curved liquid crystal decorative body according to claim 1, wherein the substrate (2) is black and opaque, and the substrate (2) is a black, opaque synthetic resin plate, and the resin layer (4) is transparent. Curved liquid crystal decoration described in section