JPH0356721B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a synthetic resin compact container having a mirror portion on the back surface of the lid body.

Conventional synthetic resin compact lids generally have a decorative section on the front and a glass mirror on the back.
Because the mirror was made of glass, not only the lid itself, but also the entire compact was heavy, and since the mirrors were glued together, it was thick, and the mirror often broke when dropped. In addition, since the lid of such conventional compacts is heavy due to the glass mirror, for example, when traveling, you can stand the compact on a desk or other place and use the compact's mirror to apply makeup. When doing this, there was the inconvenience that if you didn't put a support behind it, it would fall over.

On the other hand, when looking at such conventional compacts from a manufacturing perspective, it is necessary to go to the trouble of attaching a mirror to the back of the lid using adhesive, etc., and in order to make it more decorative, the surface of the lid, etc. This required extra effort, such as having to undergo various processing.

The present invention has been made in consideration of the various problems described above, and has a mirror portion that is thin, lightweight, and impact resistant, thereby preventing the mirror from being accidentally broken. , the compact container itself does not fall over due to the weight of the mirror even when the lid is wide open, ensuring convenience when applying makeup, etc.
Furthermore, it is an object of the present invention to provide a synthetic resin compact container that is extremely efficient and effective in terms of both manufacturability and decoration.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figures 1a and 1b are a plan view and a sectional view showing a lid of a synthetic resin compact container according to the present invention;
Figure c is a cross-sectional view showing the whole, and in these figures, 10 is a container body, 1 is a lid body that is hinged to this container body and opens and closes the container body, and 2
is a flat part 1 formed on the back surface 1a of this lid body 1.
Reference numeral b indicates a vapor-deposited metal layer, reference numeral 4 indicates a transparent film pasted on the metal layer 2 via an adhesive layer 3, and reference numeral 5 indicates a circumferential groove into which the edge of the mask member is fitted.

Next, an example of a method for manufacturing the compact (lid) having the above structure will be described with reference to FIGS. 2 to 5, which show the steps in order.

First, polyethylene, styrene, acrylic,
A lid body 1 having a flat portion 1b and a circumferential groove 5 as shown in FIG. 2 is formed by injection molding using a thermoplastic synthetic resin such as acrylonirollyl styrene resin. During this injection molding, the flat part 1
The surface roughness of the mold (not shown) corresponding to b is 0.2s.
As a result, the surface roughness of the flat portion 1b is made to be 0.2 s or less, that is, the surface of the flat portion 1b is finished to a mirror finish.

Next, as shown in FIG. 3, a metal layer 2 is formed on the flat part 1b of the lid body 1 obtained by this injection molding by vacuum evaporation. At this time, the lid body 1
The edge of the mask member 6 is fitted into the circumferential groove 5, and metal vapor deposition is performed only on the flat surface 1b. The materials used to form the metal layer 2 by performing this metal vapor deposition include aluminum, which has a high reflectance;
A metal material such as silver or rhodium is preferable, and a film thickness of 400 Å (angstroms) or more is sufficient.

Once the metal layer 2 is formed on the flat part 1b in this way, a transparent or ultraviolet curable adhesive that becomes transparent after curing is applied on the metal layer 2, the main component of which is polyfunctional acrylate and drying oil-denatured urethane acrylate. An adhesive is applied to form an adhesive layer 3 (fourth
), on this adhesive layer 3, as shown in FIG. Laminate-type transparent films 4 formed of synthetic resin layers 4b having the following properties are overlapped, and after being pressed with a pressure plate or the like to make them stick together, the adhesive layer 3 is irradiated with ultraviolet rays to remove the adhesive layer 3. By curing and adhering the transparent film 4 to the metal layer 3,
A lid 7 having a plane mirror (mirror part) on the back surface is formed.
Here, the transparent film 4 is preferably formed by applying a hard coat layer to one side of a polyester film, polycarbonate film, cast acrylic film, or the like.

Note that the smaller the surface roughness of the flat part 1b of the lid main body 1, the better the mirror effect, that is, the reflectance of the metal layer 2. However, if the surface roughness is too small, that is, if it is made mirror-like, the metal layer 2 will not adhere to the surface. There may be a decrease in sexual performance. In such a case, the flat part 1b is subjected to plasma treatment in a vacuum to create countless extremely small craters (the flat part 1b
If the metal layer 2 is formed after forming the metal layer 2 to an extent that does not impair the smoothness of the metal layer 2, the adhesion to the flat portion 1b can be improved without reducing the reflectance of the metal layer 2.

By the way, the plane mirror A of the lid 6 formed in this way
is thin and very light, and since the plane mirror A is mainly composed of a vacuum-deposited metal layer 2 and a synthetic resin, it has good impact resistance.
It also has some flexibility, so even if it is accidentally dropped on the floor or the like, the plane mirror A will not break at all like conventional glass mirrors. In addition, when injection molding the lid body 1, by simply setting a mold whose surface roughness is 0.2s or less corresponding to the flat part 1b of the lid body 1, the surface of the plane mirror A can be molded. The surface (flat portion 1b) can be formed extremely easily. Further, in the present invention, in order to adhere the transparent film 4 on the metal layer 2, an ultraviolet curable adhesive is applied to form the adhesive layer 3, and after the transparent film 4 is overlapped and brought into close contact with the adhesive layer 3, Since the adhesive layer 3 is cured by irradiation with ultraviolet rays, the time required for the bonding process is very short (several seconds to several minutes), and therefore,
Productivity can be improved. Moreover, since the transparent film 4 has the hard coat layer 4a in this way, the metal layer 2 is completely protected, and the reflectance of the metal layer 2 does not decrease during long-term use.

In addition to forming the adhesive layer 3 by applying an adhesive as described above, it may also be formed by a method such as spraying, or it may be formed in advance on the surface of the synthetic resin layer 4b of the transparent film 4. good.

In addition, various resins can be used as the synthetic resin material for forming the lid body 1, such as transparent resin, transparent colored resin, and transparent resin mixed with colored resin. These resins can be freely selected, and the shape of the plane mirror A is not limited to the circular shape as in the embodiment, but may be formed to match the outer shape of the lid body 1, such as a polygon of triangular or larger size or an elliptical shape. .

By the way, the shape of the surface 1c of the lid body 1 is as follows.
Although it can be of any shape, such as a planar shape as shown in FIG. 5 or a spherical shape as shown in FIG. 6, for example, the lid body 1 may be made into a spherical shape as shown in FIG. If formed, the surface 1c of the lid body 1 can be used as a convex mirror (mirror part), and if the lid body 1 is made of yellow-colored translucent resin, the surface 1c will be a deep golden metallic. In this way, the metal layer 2 can be used as a convex mirror in addition to a plane mirror, and also as a surface 1c.
It exhibits various effects as a decoration.

As detailed above, the present invention includes a container body,
In a synthetic resin compact container that includes a lid body that is hinged to the container body to open and close the container body, and a mirror portion provided on the back surface of the lid body, the mirror portion is provided on the back surface of the lid body. It is composed of a flat surface having a surface roughness of 0.2S or less, a metal layer formed by vacuum evaporation on this flat surface, and a transparent coating layer covering this metal layer, and the coating layer is an adhesive layer made of an ultraviolet curable transparent adhesive provided on the metal layer, and a synthetic resin layer having a hard coat layer on one side and a synthetic resin layer having good affinity and adhesion to the adhesive layer on the other side. Since it is characterized by being composed of a formed transparent film, the following effects can be achieved.

(b) As a mirror part to be provided on the back side of the lid body of the compact container, a flat part with a surface roughness of 0.2S or less is formed on the back side of the lid body, and a metal layer is provided on this flat part by vacuum evaporation. A transparent film formed on the metal layer by an adhesive layer made of an ultraviolet curable transparent adhesive, and a hard coat layer on one side and a synthetic resin layer having good affinity and adhesion to the adhesive layer on the other side. Since the mirror part is constructed by providing a transparent coating layer,
This mirror part is thin and extremely light, and since it is mainly composed of a metal layer and synthetic resin, it is not only impact resistant but also has some flexibility. Even if it is accidentally dropped on the floor or the like, the mirror part A will not break at all like conventional glass mirrors.

(b) The lid body and mirror are constructed as a single unit, and the mirror itself is extremely thin (about 2 to 3 microns).
Because of this structure, the lid itself is extremely thin and lightweight compared to conventional compact lids that have glass mirrors pasted together. Therefore, a compact container constructed by combining the lid and the container body can be made thinner and lighter than ever before, and since the weight of the lid is extremely light compared to the weight of the container body, the lid can be easily removed. Even if the compact container is opened more than 90 degrees and used while standing on a desk or the like, there will be no problem of the compact container falling backwards, making it highly convenient to use.

(c) In addition, especially according to the present invention, since a configuration is adopted in which the mirror portion is directly formed on the back surface of the lid body by vacuum deposition, there is no need to separately manufacture a glass mirror as in the conventional case. It is possible to eliminate the work of attaching the glass mirror by hand using adhesive, and in addition, the flat part that is the base of the mirror can be removed using the metal used for molding the lid body when molding the lid body. A flat part with a surface roughness of 0.2S or less can be molded at the same time using a mold, and after that, a metal layer, an adhesive layer,
All one has to do is to stack transparent films and irradiate ultraviolet rays from above to harden them. As a result, the lid with a mirror can be produced extremely easily.

(d) In addition, when the lid body is formed using a transparent or colored transparent synthetic resin material, the color of the synthetic resin material and the color of the metal layer on the back of the lid body may be combined independently or mixed. Various colors, patterns, etc. with high decorative effects can be displayed on the surface of the main body. That is, the metal layer is
In addition to acting as a plane mirror on the back side of the lid body, it also functions as a surface decoration on the front side of the lid body.

(e) Since the coating layer has a three-layer structure consisting of an adhesive layer, a synthetic resin layer, and a hard coat layer, the metal layer is completely protected and exhibits the same durability as a glass mirror.

[Brief explanation of drawings]

FIG. 1a is a plan view showing an embodiment of the lid formed by the method of the present invention, and FIG. 1b is the x in FIG. 1a.
2 to 5 are sectional views similar to FIG. 1b showing an embodiment of the present invention in the order of steps; c is a perspective view showing the whole; FIG. 5a is the same Cross-sectional view of the transparent film used in Examples, No. 6
The figure is a sectional view showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Lid body, 1a...Back surface, 1b...Plane part, 2...Metal layer, 3...Adhesive layer, 4...Transparent film, 4a...Hard coat, 4b...Synthetic resin layer, 7 ……lid.

Claims (1)

[Claims] 1. A synthetic resin compact container comprising a container body, a lid body hinged to the container body to open and close the container body, and a mirror provided on the back side of the lid body. , the mirror part includes a flat part formed on the back surface of the lid body and having a surface roughness of 0.2S or less;
It is composed of a metal layer formed by vacuum deposition on the surface of this flat part, and a transparent coating layer covering this metal layer, and the coating layer is an ultraviolet curing transparent coating layer provided on the metal layer. A transparent film formed of an adhesive layer made of adhesive, a hard coat layer on one side, and a synthetic resin layer on the other side that is adhered to the adhesive layer and has good affinity and adhesion to the adhesive layer. A synthetic resin compact container characterized by comprising: 2. The synthetic resin compact container according to claim 1, wherein the lid body is made of a transparent or colored transparent synthetic resin material.