KR20150037148A

KR20150037148A - Method for calculating hardness grade of toothbrush bristle, and toothbrush and packing for toothbrush with printed hardness grade of toothbrush bristle

Info

Publication number: KR20150037148A
Application number: KR20130116460A
Authority: KR
Inventors: 박미정; 김성진; 하원호
Original assignee: 주식회사 엘지생활건강
Priority date: 2013-09-30
Filing date: 2013-09-30
Publication date: 2015-04-08

Abstract

The present invention relates to a method for calculating the hardness grade of a toothbrush bristle using an ISO 8627 method or a measurement method as a modification of the ISO 8627 method to measure the softness of a toothbrush bristle and to enable a user to select a toothbrush suitable for user teeth, gum conditions, and preferences when purchasing a toothbrush by providing information on the softness of a toothbrush bristle.

Description

[0001] The present invention relates to a toothbrush and a toothbrush, and more particularly, to a method for calculating a hardness grade of a bristle and a packaging material for a toothbrush and a toothbrush printed with a bristle grade hardness grade,

The present invention relates to a method of calculating the degree of softness of a bristle and a packaging material for a toothbrush and a toothbrush printed on the outer surface of a bristle hardness grade.

It is desirable for the manufacturer to indicate the hardness so that the consumer can select a toothbrush having a mild softness suitable for the selection and purchase of the toothbrush. Most toothbrushes currently on the market are classified in three categories: soft, normal, and strong, according to the KS standard. In the case of all the different types of softness, softness is indicated only as a mica standard, which does not help consumers to select the right toothbrush.

In addition, since the bristle hardness according to the KS standard is measured by cutting the bristles to a certain length, in the case where the end portion is very thin, the softness due to the end portion of the bristles is not reflected by the method of measuring the bristle hardness according to the KS standard There is a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art described above, and it is an object of the present invention to provide a method of calculating a hardness grade of a bristle, which can accurately reflect smoothness due to the end portion of a bristles in the case of a very fine- It is an object of the present invention to provide a printed bristle and a bristle wrapping material.

The method for calculating the degree of bristle hardness according to an aspect of the present invention is characterized in that the degree of softness of the bristles can be measured using a measurement method that is based on the ISO 8627 measurement method or the ISO 8627 measurement method.

Preferably, the ISO 8627 measurement method is performed by calculating a value obtained by dividing the maximum force that the bristles bend when the predetermined height portion of the bristles passes through a plurality of parallel wires by an area of the whole hole in which the bristles are bristled.

Preferably, the modified measuring method based on the ISO 8627 measurement method determines the maximum force that the bristles bend when passing through a plurality of parallel wires of different bristles depending on the type of bristles, And calculating a divided value.

A toothbrush according to another aspect of the present invention is characterized in that the bristle hardness grade indicating the degree of softness of the bristles is printed on the outside.

Preferably, the bristle hardness grade is calculated using a measurement method that is modified based on the ISO 8627 measurement method or the ISO 8627 measurement method.

The packaging material for a toothbrush according to another aspect of the present invention is characterized in that the bristle hardness grade indicating the degree of softness of the bristles is printed on the outer side.

The method for calculating the hardness grade of the bristles according to the present invention and the packaging material for the toothbrush and the toothbrush printed with the bristle hardness grade have the following effects.

First, the ISO 8627 measurement method can be used to calculate the hardness grade of the bristles on the basis of the bending force of a certain point on the bristles.

Second, by using the modified measurement method based on the ISO 8627 measurement method, it is possible to more precisely match the measured bristle hardness value with the actual user's sensed bristle softness using the ISO 8627 measurement method compared to the case of using the bristle hardness grade.

1 is a view for explaining a method of calculating the hardness grade of bristles using the ISO 8627 measurement method.
2 is a view for explaining a method of calculating the hardness grade of bristles using a measurement method modified based on the ISO 8627 measurement method.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

In the drawings, the size of each element or a specific part constituting the element is exaggerated, omitted or schematically shown for convenience and clarity of description. Therefore, the size of each component does not entirely reflect the actual size. In the following description, it is to be understood that the detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a view for explaining a method of calculating the hardness grade of bristles using the ISO 8627 measurement method.

1, in the ISO 8627 measurement method, the maximum force F of the bristles 10 when the bristles 10 pass through a plurality of parallel wires (not shown) (A) of the entire hole. The total area A of the holes refers to the sum of the areas of all the holes provided in the toothbrush head 20 in order to implant the bristles. The maximum force F refers to the maximum force applied to the grid surface of the wire when a certain height portion of the bristles 10 is put under the grid surface of a plurality of parallel wires and the experiment is proceeded.

The predetermined height of the bristles 10 passing through the plurality of wires is not particularly limited. For example, the upper portion of the bristles may be passed through a plurality of wires parallel to each other by 0.3 times the length of the bristles from the end of the bristles 10 have. Specific equations (1) and (2) for calculating the bristle hardness value (G) according to the ISO 8627 measurement method are as follows.

: Average diameter of three holes adjacent to each other

N: total number of holes provided in the toothbrush head 20

F: maximum force

2 is a view for explaining a method of calculating the hardness grade of bristles using a measurement method modified based on the ISO 8627 measurement method.

The hardness value of the bristles 10 calculated according to the ISO 8627 measurement method described above can be inferred from the measurement method by inserting a certain portion of the bristles 10 under a plurality of parallel wires so that the micro- The softness due to the end portion of the bristles 10 can not be expressed.

To solve this problem, a modified measurement method based on the ISO 8627 measurement method was introduced. The modified measurement method based on the ISO 8627 measurement method is a method in which the upper side point is placed under parallel wires of 0.1 to 0.2 times the length of the bristle head from the tip of the bristle tip, which is not the midpoint of the bristles 10, , It is possible to reflect the softness due to the end portion of the fine grain to the hardness value. In the case of a general simulation in which the ends of the bristles are rounded, the upper side point can be inserted under a plurality of parallel wires by 0.1 to 0.2 times the average length of the bristle lengths from the end of the average length of the bristle lengths, and the hardness value can be calculated.

The hardness grade of the bristles 10 is not particularly limited. For example, as shown in Table 1 below, the hardness value G obtained by dividing the bristle strength cN by the hole area (mm ² ) is 1 or more and less than 1.5 Class 1, Class 2, Class 2, Less than 2.5 Class 3, Class 2.5 and Class 3, Class 4, Class 3 and Class 4, Class 5.

1 rating Less than 1.5 2 ratings 1.5 to 2.0 3 ranks 2.0 to 2.5 4 ratings 2.5 to 3.0 5 ratings 3.0 or higher

In Experiment 1, the hardness value G1 of the bristles 10 calculated using the modified ISO 8627 measurement method and the hardness value G2 of the bristles 10 calculated using the ISO 8627 measurement method are respectively calculated, The calculated hardness value (G1) and hardness value (G2) were compared with sensory evaluation of the actual user.

The hardness value (G1) according to the modified ISO 8627 measurement method is obtained by measuring the maximum force (F) after passing the 2.0 mm portion of the micro-tip of the fine tip of the fine toothbrush through the grid at a constant speed , And dividing the measured maximum force (F) by the total hole area (A).

The sensory evaluation of actual users was made by evaluating the degree of softness of the toothbrush felt when brushing five adults and five women aged 20 to 40 years old. The sensory evaluation was carried out so as to show the use feeling of the toothbrush after brushing on a scale of 5 points. The lower the score, the smoother the bristles 10 and the higher the score, the stronger the bristles 10 (1 point: Point: soft, 3 points: normal, 4 points; strong, 5 points; very strong). In the sensory evaluation, softness was quantified by averaging 10 scores for each toothbrush.

In Experiment 1, the hardness value (G1) and the hardness value (G2) measured for 13 kinds of toothbrushes in the market were compared with the sensory evaluation of the actual user, and the calculated values are shown in Table 2. The hardness grade in Table 2 is calculated based on the hardness value (G2).

No.1 Hardness rating Types of toothbrush The hardness value (G1) The hardness value (G2) Sensory evaluation
(5 points scale) One lv.1 A 1.38 4.83 1.4 2 lv.1 B 1.49 4.54 1.6 3 lv.2 C 1.62 3.89 1.7 4 lv.2 D 1.79 4.21 2.0 5 lv.3 E 2.28 4.92 1.7 6 lv.3 F 2.37 4.98 1.5 7 lv.3 G 2.43 4.93 2.1 8 lv.4 H 2.65 4.06 2.6 9 lv.4 I 2.84 4.50 2.5 10 lv.4 J 3.02 3.64 3.0 11 lv.5 K 3.13 4.57 2.8 12 lv.5 L 3.36 3.96 3.1 13 lv.5 M 4.00 7.46 3.3

A comparison between the hardness value G1 and the hardness value G2 shows that the hardness value G2 is in agreement with the softness of the bristles 10 sensed by the actual user as compared with the hardness value G1. That is, it can be concluded that the softness of the bristles 10 felt by an actual user during tooth brushing can be quantified by the modified ISO 8627 measurement method. Accordingly, the hardness value G2 calculated by the modified ISO 8627 measurement method is indicated on the toothbrush or the toothbrush packaging material, thereby helping the user to select a toothbrush suitable for his or her own tooth, gum state, and taste when purchasing a toothbrush .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

10: bristles 20: toothbrush head
F: maximum force

Claims

Wherein the degree of softness of the bristles can be measured using the ISO 8627 measurement method or the measurement method modified based on the ISO 8627 measurement method.

The method according to claim 1,
In the ISO 8627 measurement method,
And calculating a value obtained by dividing a maximum force of the bristles by the area of the entire hole in which the bristles are formed, when a predetermined height portion of the bristles passes through a plurality of parallel wires. .

Wherein a bristle hardness grade indicating the degree of softness of the bristles is printed on the outer surface.

5. The method of claim 4,
The bristle hardness grade may be,
Wherein said toothbrush is calculated using an ISO 8627 measurement method or a measurement method modified based on the ISO 8627 measurement method described above.

6. The method of claim 5,
In the ISO 8627 measurement method,
Wherein a maximum value of the force exerted by the bristles when the predetermined height portion of the bristles passes through the plurality of parallel wires is calculated by calculating a value obtained by dividing the maximum force by the area of the whole hole in which the bristles are implanted.

6. The method of claim 5,
The modified measurement method based on the ISO 8627 measurement method,
And calculating a value obtained by dividing the maximum force that the bristles are bent by the area of the whole hole in which the bristles are formed when a height portion of the bristles applied differently according to the type of the bristles passes through a plurality of parallel wires. Toothbrush.

Characterized in that the bristle hardness grade indicating the degree of softness of the bristles is printed on the outer surface.

9. The method of claim 8,
The bristle hardness grade may be,
Characterized in that it is calculated using an ISO 8627 measurement method or a measurement method modified based on the ISO 8627 measurement method described above.

10. The method of claim 9,
In the ISO 8627 measurement method,
Wherein a maximum value of the force exerted by the bristles when the predetermined height portion of the bristles passes through the plurality of parallel wires is calculated by dividing the maximum force by the area of the entire hole in which the bristles are put.

10. The method of claim 9,
The modified measurement method based on the ISO 8627 measurement method,
And calculating a value obtained by dividing the maximum force that the bristles are bent by the area of the whole hole in which the bristles are formed when a height portion of the bristles applied differently according to the type of the bristles passes through a plurality of parallel wires. A toothbrush packaging material.