JP2011255910A - Roll-on container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll-on container allowing adjustment of an amount of an applied content, and allowing application of particularly even a content having extremely low viscosity, wherein a thickener is not blended, without dripping.SOLUTION: The roll-on container includes an inner plug rotatably holding a ball having a diameter of 5-40 mm and is disposed in a container mouth, distributies the content stored in a container body onto the surface of the ball through a flow passage of the inner plug, and applies the content on a desired part. The diameter of the flow passage of the inner plug is 1 mm or above, and 1/4.5 or below of the diameter of the ball.

Description

  The present invention relates to a roll-on container in which an inner stopper that rotatably holds a ball is disposed at a container mouth, and contents such as cosmetics are distributed on the surface of the ball and applied to a desired site.

  Conventionally, a roll-on container that has an internal stopper that holds the ball rotatably at the mouth of the container, distributes the contents to the surface of the ball, and applies it to the desired site, makes it easy to clean the contents of cosmetics, medicines, etc. It is widely used as a container that can be applied to the surface. When using a roll-on container, bring the ball into contact with the skin that will be the application site, lift the container body upwards, bring the contents into contact with the ball, and roll the ball on the skin. Distribute things. In this way, the contents are applied onto the skin from the surface of the ball through the gap between the ball surface and the inner peripheral surface of the inner plug.

  The gap between the ball surface and the inner peripheral surface of the inner stopper is an important part that determines the amount of the content to be applied, but prevents the ball from rotating due to dimensional errors in mass production. Therefore, it tends to increase the size of the gap. And, for the problem that the content that can be generated by increasing the gap is too much, at least the viscosity of the content is more than necessary so that the content does not sag and it does not lead to product defects such as soiling clothes etc. The actual situation is to avoid it by raising it.

  However, if the contents are given more viscosity than necessary, it will be difficult to apply to the skin, and it will be thickly coated, and after application, the convenience of the roll-on container will be impaired, such as the need to spread with fingers. It will be. In recent years, there is a refreshing feeling in the market, and a low-viscosity content that can be applied thinly and uniformly is desired, and a container corresponding to this is desired.

JP 2004-222860 A JP 2002-240847 A

  The present invention is a roll-on container that can adjust the amount of the content to be applied, and can be applied without dripping down, even if the content is very low viscosity with a small amount of thickener. It is an object to provide a simple roll-on container.

  In the present invention, an inner stopper that rotatably holds a ball having a diameter of 5 to 40 mm is disposed at the container mouth, and the contents accommodated in the container body are distributed to the surface of the ball through the passage of the inner stopper and applied to a desired site. In this roll-on container, the diameter of the flow path of the inner plug is 1 mm or more and 1 / 4.5 or less of the diameter of the ball.

  Moreover, this invention is a roll-on container characterized by accommodating the content whose viscosity is 20-300 mPa * s.

  According to the present invention, even in a roll-on container, the amount of contents to be applied can be adjusted, and in particular, the viscosity that could not be applied conventionally due to variations in mass production of roll-on containers. Even if the content is low, it is possible to provide a roll-on container that can be properly applied without dripping the content.

Perspective view (partial cross section) of roll-on container Cross section of roll-on container Enlarged view of the ball and inner stopper of the roll-on container A-A line sectional view Cross-sectional view of a conventional roll-on container

  The form of the roll-on container of this invention is demonstrated in detail using drawing.

  FIG. 2 shows a cross-sectional view of the roll-on container of the present invention. An inner stopper (3) is placed at the mouth of the container body (1). The inner plug (3) holds the ball rotatably on the inner peripheral surface (7).

  When using the roll-on container, the container (1) is lifted upward while bringing the ball (2) into contact with the skin to be applied, and the contents contained in the container body (1) are transferred to the flow path (8). The ball (2) is brought into contact with the ball (2), and the ball (2) is rolled on the skin to distribute the contents on the ball surface, and is applied onto the skin through the gap between the ball surface and the inner peripheral surface of the inner plug. To do.

  The diameter of the ball (2) is designed to be a size suitable for application to a desired site as a roll-on container. The width to be applied at one time depends on the size of the ball, and the diameter of the ball (2) is preferably 5 to 40 mm, more preferably 7 to 35 mm in consideration of the width of the application surface when applied to the human skin.

  In order to bring the contents contained in the container body (1) into uniform contact with the ball surface regardless of the rotation direction of the ball (2), the cross-section of the flow path (8) of the inner plug is usually circular, but the shape of the container It is possible to make various shapes corresponding to the above, and the shape is not limited to this as long as the basic shape is a circle, an ellipse, and a similar shape.

  After use, the cap (4) is screwed onto the container body (1) and attached. On the inner surface of the cap (4), a pressing rib (6) is vertically suspended. When the cap (4) is screwed into the container body (1), the ball (2) is sealed by the pressing rib (6). 5) and the flow path (8) is closed. Thereby, the contents in the container body (1) can be blocked from contact with the outside air, and the quality can be maintained (FIG. 2).

  FIG. 4 is a cross-sectional view taken along line AA. R represents the inner radius of the inner plug (3), and r represents the radius of the cross section of the ball (2). The inner plug (3) and the ball (2) are both obtained by molding a synthetic resin, but the variation due to mass production is about ± 0.05 mm for R and about ± 0.05 mm for r. The clearance (9) between the inner plug (3) and the ball (2) needs to be at least 0.05 mm so that the ball (2) rotates smoothly and feeds out the contents. Therefore, the gap (9) is set to 0 so that the gap (9) can be maintained at 0.05 mm even when the inner plug having the smallest mouth radius R and the rotating ball having the largest cross-sectional radius r are combined due to variation in molding. Design as 15 mm. On the contrary, when the smallest ball and the largest inner plug are combined, the gap (9) is 0.25 mm.

  A roll-on container having a large gap (9) that can be generated due to variation has a large amount of contents, and there is a possibility that problems such as dripping or flowing out of the contents may occur. For this reason, conventionally, this problem has been solved by adding a large amount of a thickener to the contents and increasing the viscosity. Therefore, the viscosity of the contents stored in the conventional roll-on container was about 300 to 5000 mPa · s.

  The roll-on container according to the present invention is capable of controlling the diameter of the flow path (8) of the inner plug by controlling the diameter of the flow path (8) of the inner plug, which is caused by the variation in the mass production of the ball (2) and the inner plug (3). It is to be solved. Specifically, focusing on the relationship between the diameter of the ball (2) and the diameter of the flow path (8) of the inner plug (3), a roll-on container that does not sag even with low-viscosity contents was developed. In order to do so, we conducted a test using a prototype. As a result, a roll-on container that can solve the above-described problems, that is, an inner stopper that rotatably holds a ball having a diameter of 5 to 40 mm is disposed in the container mouth, and the diameter of the inner stopper channel is 1 mm or more. It was possible to develop a roll-on container characterized by having a diameter of 1 / 4.5 or less.

  By setting the diameter of the flow path (8) of the inner plug (3) to 1 / 4.5 or less of the diameter of the ball (2), due to the variation in mass production, Even when the gap (9) is 0.25 mm at the maximum due to the combination with the rotating ball having the smallest radius r, the amount of the content is limited, and problems such as dripping of the content do not occur. Therefore, it is not necessary to increase the viscosity by adding a thickener to the contents more than necessary, and it is possible to accommodate a low viscosity content that has a refreshing feeling and can be applied thinly and uniformly.

  Further, by setting the diameter of the flow path (8) of the inner plug to 1 mm or more, the contents can be passed smoothly, and molding is facilitated when mass producing the inner plug.

  FIG. 5 shows a cross-sectional view of a conventional roll-on container. Since the diameter of the ball (2) is about 19 mm and the diameter of the flow path (8) of the inner plug (3) is about 13.6 mm, the diameter of the inner plug flow path is about 1 / 1.4 of the diameter of the ball. It corresponds to.

  Hereinafter, the result of the use test performed about the roll-on container of this invention is demonstrated as an Example.

  Table 1 shows the results of a use test using a sample for each combination of the diameters of the balls and the inner plug channels. The container contained contents with a viscosity at 30 ° C. (bismetron rotational viscometer; rotor No. 2, rotor rotational speed 60 rpm) of 10 to 400 mPa · s.

The evaluation criteria of the roll-on container use test were as follows, and four panelists evaluated using a circle drawn several times under the armpit.
○: Appropriate amount can be applied Δ: Insufficient coating amount ×: Excessive coating amount causes the contents to sag

From the results of the use test shown in Table 1, the diameter of the flow path is 1 / 4.5 of the diameter of the ball.
Although it was confirmed that an appropriate amount can be applied by setting the following (Examples 1 to 10), when it is larger than 1 / 4.5, for example, 1 / 3.8 or more, the amount of application becomes excessive, and the contents sag. It was confirmed (Comparative Examples 1-4, 6, 7).

  In addition, it was confirmed that an appropriate amount can be applied when the diameter of the flow path is 1 mm or more (Examples 1 to 10). When the diameter is less than 1 mm, for example, 0.8 mm or less, the application amount is small, and it is sufficiently applied. (Comparative Examples 5 and 8).

  When the viscosity of the content is 10 mPa · s, the coating amount is slightly excessive and the content tends to sag (Example 2). At 400 mPa · s, the coating amount tends to be slightly insufficient (Example) 7) 20 to 300 mPa · s is preferable, and 20 to 220 mPa · s is preferable for obtaining good usability in the roll-on container of the present invention.

DESCRIPTION OF SYMBOLS 1 Container body 2 Ball | bowl 3 Inner plug 4 Cap 5 Sealing step part 6 Pressing rib 7 Inner peripheral surface 8 Channel 9 Clearance

Claims (2)

  A roll-on container in which an inner stopper that rotatably holds a ball having a diameter of 5 to 40 mm is disposed at the container mouth, and the contents accommodated in the container body are distributed to the surface of the ball through the passage of the inner stopper and applied to a desired site. A roll-on container, wherein the diameter of the flow path of the inner plug is 1 mm or more and 1 / 4.5 or less of the diameter of the ball. The roll-on container according to claim 1, wherein the container has a viscosity of 20 to 300 mPa · s.

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