KR950000458B1 - Body temperature sensing toothbrush and manufacturing method thereof - Google Patents

Abstract

The shank (1) of a tooth-brush is formed by injection molding of polypropylene resin. A 95-99 wt.% of mixture consisting of natural or synthetic rubber and pigment is mixed with 1-5 wt.% of a thermo chromic compound. An abnormal body temperature detection part (2) is formed by extruding this mixed compound on a surface of the shank (1) for 3-5 sec. at 210-215 deg.C. Projections are formed on a handle part (3). The thermo chromic compound changes color in 2-3 min. at over 38 deg.C to indicate an abnormal body temperature on the temperature detection part.

Description

Toothbrush with abnormal temperature detection function and its manufacturing method

1 is an exemplary cross-sectional view of a product of the present invention.

* Explanation of symbols for main parts of the drawings

1: toothbrush body 2: abnormal temperature detection unit

3: protrusion

The present invention relates to a toothbrush having an abnormal temperature sensing function and a method for manufacturing the same, and more particularly, to prepare a toothbrush body by general injection treatment of a thermoplastic resin in a conventional method, or natural rubber or synthetic rubber and thermochromic compound ( The present invention relates to a toothbrush having an ideal body temperature sensing function of 38 ° C. or higher, which is prepared by extruding a mixture of a thermo chromic compound) at a surface of a toothbrush body at 210 to 215 ° C. for 3 to 5 seconds, and water cooled.

Conventional general toothbrushes have a basic structure that is planted in a planar shape on one side of the body plate and have been proposed to take a form in which the sole part is bent, or to form the sole part of the sole part short or long in combination.

Such structures are inevitable to escape the common basic structure, the method of use is to wash the outer surface of the teeth with the brush portion and then brush the teeth while turning the bottom, inner surface of the car.

However, the conventional toothbrushes simply consisted of a resin body and pubic hair, and thus had a disadvantage in that it could not be excluded when used, and did not work other than cleaning the teeth.

Accordingly, the present invention has an object to provide a toothbrush that can check the presence or absence of body temperature while brushing in addition to the action of cleaning the teeth and bring the pressure effect of the palm.

In order to achieve the above object as well as another easily expressed object, in the present invention, the thermoplastic resin is generally injected in the usual manner to manufacture the toothbrush body, and then natural rubber or synthetic rubber and the thermochromic compound are applied to the toothbrush body surface. Extruded, but by forming a protrusion on the handle portion was prepared a toothbrush having an ideal temperature sensing function and acupressure effect.

The present invention will be described in more detail as follows.

Toothbrush of the present invention is composed of a toothbrush body (1), abnormal temperature sensing unit (2), projections (3) and pubic hair, after the general injection treatment of thermoplastic resin in a conventional manner to produce a toothbrush body (1) , The mixture of natural rubber and / or synthetic rubber and thermochromic compound is extruded on the surface of the toothbrush body 1 at the temperature of 210 to 215 ° C. for 3 to 5 seconds to form the abnormal temperature sensing unit 2, and the protrusions are formed on the handle part. ) Is formed and water-cooled to produce the finished product.

Injection molding is a molding operation in which a heated molten plastic material is injected into a mold and cooled, and a molded product is taken out. In general, injection molding is a method mainly used for manufacturing a toothbrush body.

Although the thermoplastic resin used for the toothbrush main body of this invention can be used as long as it has a certain strength, especially polyethylene, a polypropylene, a polystyrene resin etc. are preferable.

Polystyrene resins are manufactured by polymerizing styrene monomer as a main component, and have good balance of mechanical properties, have good properties as general purpose resins, and have good thermal stability, causing deterioration due to discoloration or decomposition even under severe conditions. It has the characteristics of excellent length stability, good colorability, and the like. Polyethylene has good impact resistance, good fluidity and thermal stability, and is excellent as a general purpose resin.

In injection molding of polyethylene, it is preferable to use a mixture of high density polyethylene and low density polyethylene appropriately in order to provide adequate flexibility, to improve impact resistance, and to improve molding fluidity, and the mixing is generally performed by simply mixing pellets into a molding machine. You can add them, but using a specific mixer is more effective.

In addition, polypropylene is a crystalline plastic, which generally has a crystallinity of 60 to 70%, a crystallization temperature of 165 to 170 ° C, and a density of 0.90 to 0.91, which is the lowest practical plastic. The resin is well balanced, and in particular, it is excellent in plasticity, heat deformation resistance, refractive resistance, and the like. As the injection molding polypropylene, a melt index of about 0.2 to 9 is generally used.

The natural rubber used in the present invention is a solid obtained from the latex secreted from the rubber tree, which is a tropical plant. The bark is damaged to leach latex latex, and particles having a diameter of 0.5 to 5.0 μm, which is the main substance of rubber, are separated from the latex. Formic acid, nitric acid and the like are added to the latex to solidify the rubber powder and to dry it.

However, in the present invention, not only natural rubber but also synthetic rubber may be used, and a mixture of natural rubber and synthetic rubber may be used.

Synthetic rubber is a synthetic polymer material that exhibits high elasticity and toughness like natural rubber, and is reinforced with oil resistance, heat resistance, and ozone resistance lacking in natural rubber.

In general, the structure having a double bond can be vulcanized, but the one without the double bond is crosslinked with a peroxide, an amine, a metal oxide, or the like. Butadiene-styrene rubber, butyl rubber, nitrile rubber, chloroprene rubber, urethane rubber, silicone rubber, fluoro rubber and stereo rubber having stereoregularity.

The thermochromic compound used in the present invention is "THERMO CHROM MASTERBATCH" manufactured by "CAMEL CHEMICAL LTD, JAPAN" of Japan, and is a composite prepared by fusing polyethylene, benzene, pigment and thermochromic components at 200 ° C. It will change the color within 2-3 minutes above 38 ℃.

The temperature abnormality detection unit firstly mixes 95 to 99% by weight of natural rubber and / or synthetic rubber with a pigment of a desired color and 1 to 5% by weight of a thermochromic compound, and then the surface of the toothbrush body at 210 to 215 ° C. It is prepared by extrusion for 3 to 5 seconds. When forming a body temperature abnormality detection part was formed a projection to make the palm pressure effect.

When the thermochromic compound is less than 1% by weight in the composition of the abnormal body temperature detection unit, it is difficult to visually determine the degree of color change, and when it is more than 5% by weight, it is not economical.

As described above, the toothbrush of the present invention holds the ideal temperature sensing unit for 2 to 3 minutes, or when brushing, the color of the abnormal temperature sensing unit is changed, so it is possible to know the ideal body temperature at the same time as the tooth is washed, and can also have acupressure effect on the palm. That would be effective.

The following examples and comparative examples further illustrate the invention, but do not limit the scope of the invention.

Example 1

After injection molding polypropylene resin (manufactured by Hannam Chemical Co., Ltd., XL300) by a conventional method to manufacture a toothbrush body, 95% by weight of natural rubber, 3% by weight of red pigment, manufactured by Japan Chemical Company, Japan After homogeneously mixing 2% by weight of THEROMOCHROM MASTERBATCH, the prepared toothbrush was extruded for 3 seconds at a temperature of 215 ° C. to form an abnormal temperature sensing unit, but the protrusions were projected.

Toothpaste is planted in the manufactured toothbrush body to produce a finished product.

The prepared toothbrush was left at 38 ° C. for 3 minutes, and the color of the abnormal temperature sensing unit disappeared to white.

Comparative Examples 1 and 2

Toothbrushes were prepared in the same manner as in Example 1, except that the thermochromic compound was 0.5 wt% and 6 wt%, respectively, and the mixture was added at 0.5 ° C for 3 minutes to identify color changes. It was difficult, and the addition of 6% by weight did not increase the addition effect more than the addition of 2% by weight.

Claims (3)

After the injection molding of the thermoplastic resin to prepare the toothbrush body 1, a mixture of 95 to 99% by weight of the mixture of natural rubber and / or synthetic rubber and pigment and 1 to 5% by weight of the thermochromic compound is mixed with the toothbrush body ( 1) A method for manufacturing a toothbrush having an abnormal temperature sensing function, which is formed by extrusion molding at 210 to 215 ° C. on the surface for 3 to 5 seconds to form an ideal temperature sensing unit 2 and a protrusion 3 on a handle part. . The method of claim 1, wherein the thermochromic compound is discolored in 2-3 minutes at 38 ℃ or more. A toothbrush made by the method of claim 1.