JPH0520168Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a toothbrush made of styrene-acrylonitrile copolymer resin or polycarbonate resin, in which part or the entire handle is layered with anthraquinone disperse dye of the same or different colors. The present invention relates to a toothbrush that has transparency and also realizes color tone changes such as mixed colors and shading differences through dyeing.

Traditionally, the coloring of toothbrushes has been done for example since 1983.
As shown in Publication No. 50672, pigments or dyes are mixed in advance with a synthetic resin material as a raw material, the synthetic resin is colored in any desired color, and then this synthetic resin material is applied to the entire or predetermined portion of a predetermined mold. By pouring, a toothbrush colored in a single color or in multiple colors is obtained.

These toothbrushes are colored before molding, so the manufacturing cost of multi-colored molded products is high, and it is difficult to form complex patterns, or it is difficult to pre-color the synthetic resin material before molding. from,
Although it is suitable for mass-producing toothbrushes of the same color, there is a problem in that it is not possible to produce toothbrushes in small quantities at low cost.

On the other hand, some toothbrushes have their surface colored after the body is formed, but since this is done by painting, it is opaque and lacks a clean and refreshing feeling, and is similar to the toothbrush mentioned above. However, it is difficult to form complex patterns, and in most cases, the entire surface is colored in the same color with little variation.

The present invention provides a transparent colored part with a difference in shading by overlapping dyeing with an anthraquinone disperse dye, or two By providing a transparent colored part that is more transparent than the color, the purpose is to provide a toothbrush that has a clean and refreshing feeling and has a variety of color tones such as mixed colors and differences in shading. The aim is to provide unique toothbrushes in small quantities at low cost.

An embodiment of the present invention will be described based on FIG. 1. Reference numeral 1 denotes a toothbrush consisting of a transparent toothbrush body 2 molded from styrene-acrylonitrile copolymer resin and bristles 4 planted in a bristles part 3. The shape is a long plate. The toothbrush body 2 can also be made of polycarbonate resin. 5 is the handle of toothbrush 1, 6 is this handle 5
A blue colored part is colored with an anthraquinone disperse dye on the flocked part 3 side, and 7 is a dyed colored part formed in the remaining part of the blue colored part 6 of the handle 5.

This toothbrush is formed as follows. That is, first, the toothbrush main body 2 before the bristles 4 are implanted is molded as a long plate-like transparent molded product using a styrene-acrylonitrile copolymer resin. next,
This transparent toothbrush main body 2 is supported with a suitable hanging tool with the bristles 3 facing upward. The suspended toothbrush body 2 is placed in a dye bath in which a dye consisting of an anthraquinone dispersed blue dye and benzyl alcohol is heated to around 80°C.
A portion of length l1 from the base end side of the handle 5 is immersed. At this time, the dye is gently stirred, thereby achieving uniform dyeing. The toothbrush main body 2 immersed in this dye bath is pulled up after 3 to 4 minutes, washed with water, and then dried with hot air at about 50°C. Next, the toothbrush obtained in this way, that is, the toothbrush main body 2 whose length l1 from the proximal end is colored blue, is next colored with red anthraquinone-based It is immersed in a dye containing a disperse dye in the same manner as in the case of blue coloring, so that the red dye is superimposed on the blue colored part, and then it is dried. The anthraquinone disperse dye dyes the styrene-acrylonitrile copolymer resin and polycarbonate resin by penetrating them, so the blue-colored parts of the toothbrush after dyeing are also dyed.
Blue The blue part and the red dye layer also maintain transparency.

In this way, the length l2 from the base end side of the handle 5 is
The part is the result of mixing blue and red dyes,
This becomes a purple colored part 7. And the length of handle 5
The part obtained by subtracting the length l2 from l1 becomes a blue colored part 6, and a toothbrush with various colors can be obtained.
Both the purple colored part 7 and the blue colored part 6 maintain a transparent state, and the area around the uncolored flocked part 3 maintains the colorless and transparent state at the time of molding, so the toothbrush body 2 as a whole has a transparent appearance. A colored toothbrush having three colors is formed while maintaining the same color. After being colored in multiple colors in this manner, the bristles 4 are formed on the bristles 3 to form the toothbrush 1. Note that even if the bristles 4 are formed before dyeing, a similar toothbrush can be obtained.

The toothbrush 1 of this embodiment is produced by overlaying a red anthraquinone disperse dye of another color on the length l1 portion of the toothbrush body 2, which is a portion dyed with one color, while maintaining transparency. In addition, since the length l2 portion of the toothbrush body 2 is colored purple, multiple colors with transparency can be easily achieved, and the range of the colored portion can also be changed depending on the depth of immersion in the dye bath. Since the color can be changed arbitrarily, toothbrushes with various colors can be produced in small quantities without increasing the cost.

Both the colored part and the non-colored part maintain a transparent state, and the toothbrush as a whole has transparency, so it is possible to provide a toothbrush that feels clean and refreshing. Since the flocked part 3, which is the part to be inserted into the hair, is not colored at all, the cleanliness and coolness are further emphasized.

In this embodiment, the blue colored portion 6 and the purple colored portion 7 are formed, but other colors may also be used. For example, by dyeing the length l1 portion of the toothbrush body 2 with a red dye, and then dyeing the length l2 portion of the toothbrush body 2 with a dye of the same color,
The length l2 part of the toothbrush body 2 is colored dark red,
It is also possible to make the remaining part a light red color, and make the colored part the same color with different shading.

FIG. 2 shows another embodiment of the present invention. In this embodiment, the length l3 portion of the handle 5 is formed as a red colored part 8, but the red colored part 8 has a length l4. This is a case where a band-like pattern 9 is formed on the circumferential surface of the handle body 2 in a different color or the same color and having different shades of light and shade.

The red and blue parts 8 in this embodiment are formed as follows. That is, the toothbrush main body 2 is
It is formed in the same manner as the previous embodiment and maintains a transparent state. Next, before soaking in the dye, use tape, etc. that can surround the length l4 portion of the toothbrush body 2 and that can be pasted, and cut out a part corresponding to the band-like pattern 9 from this tape, etc. Place it on the toothbrush body 2 and paste it on the toothbrush body 2. Then, the dyeing is carried out on the length l3 portion of the toothbrush main body 2 in the same manner as in the previous embodiment, and then the tape and the like are peeled off. As a result, the part covered by the tape is not over-dyed, and only the band-shaped cut-out part is over-dyed, so that the toothbrush body 2 is colored red with a band-like pattern 9 of different colors or the same color with different shading. It is possible to form part 8.

In the toothbrush 1 of this embodiment, it is possible to obtain a toothbrush main body 2 having a band-like pattern 9, and it is possible to easily form patterns in shapes such as letters, numbers, etc., which have been considered difficult in the past. Toothbrushes with various colors and patterns can be provided without increasing costs.

The toothbrush of the present invention has a transparent colored part formed by overlapping dyeing with an anthraquinone disperse dye on part or all of the transparent toothbrush handle molded from styrene-acrylonitrile copolymer resin or polycarbonate resin. In addition to providing a toothbrush with a clean and refreshing feeling, the transparent colored part can be dyed in multiple colors by overlapping dyeing, or can be made into a toothbrush with different shades of the same color, so a toothbrush with a wide variety of colors can be provided. Obtainable. In addition, the coloring range, pattern, etc. can be set freely, making it possible to easily create extremely versatile toothbrushes.

Furthermore, unlike conventional toothbrushes, the synthetic resin material used as the raw material is not colored by pre-mixing dyes, but instead the toothbrushes are individually colored after being molded. It becomes possible to produce toothbrushes in small quantities at low cost.

Since anthraquinone disperse dyes can be dyed by penetrating into styrene-acrylonitrile copolymer resins and polycarbonate resins, it is easy to dye these resins while maintaining their transparent state.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a front view and FIG. 2 being a rear view of another embodiment. 1...Toothbrush, 2...Toothbrush body, 5...
Handle, 6... Blue colored part, 7... Purple colored part, 8... Red colored part.

Claims (1)

[Claims for Utility Model Registration] (1) Part or all of the handle of a transparent toothbrush molded from styrene-acrylonitrile copolymer resin or polycarbonate resin is dyed with superimposed anthraquinone disperse dyes to create shading differences. A toothbrush characterized by being provided with a transparent colored part or a transparent colored part with two or more colors. (2) The toothbrush according to claim 1, wherein the transparent colored portion has two or more colors by overlapping different colored dyes. (3) The toothbrush according to claim 1, wherein the transparent colored portion is of the same color and has a difference in shade by overlapping dyes of the same color. (4) The toothbrush according to claim 1, wherein the transparent colored portion has a different color pattern formed by overlapping dyes of different colors or a shading pattern formed by overlapping dyes of the same color.