WO2024090349A1

WO2024090349A1 - Dentifrice

Info

Publication number: WO2024090349A1
Application number: PCT/JP2023/037998
Authority: WO
Inventors: 博詞鈴木
Original assignee: 花王株式会社
Priority date: 2022-10-25
Filing date: 2023-10-20
Publication date: 2024-05-02
Also published as: JP7484002B1; JP2024070820A

Abstract

The present invention relates to a dentifrice comprising a dentifrice composition filling an upright bottle container having an airless pump, the dentifrice being capable of sufficiently suppressing scatter and securing preferable discharging and shape retention. Namely, the present invention is a dentifrice comprising a dentifrice composition (Y) filling an upright bottle container (X) having an airless pump component provided with a nozzle and connected to an upper opening of a container body at an initial filling rate of less than 100%, wherein the upright bottle container (X) has an inlet (x1-1) in a specific state and the dentifrice composition (Y) has a specific ratio of the Helipath viscosity (y1) at 25°C which is a specific value to the B8H viscosity (y2) at 25°C.

Description

Toothpaste

The present invention relates to a dentifrice in which a dentifrice composition is filled in an upright bottle container.

Dentifrice filled in a container equipped with a pump can be easily dispensed by simply pressing the pump when in use. In particular, the use of an "airless pump" that does not allow air to enter as the pump has the advantage of being able to easily prevent deterioration of the quality of the contents compared to air-inflow type pumps.
For example, Patent Document 1 discloses a toothpaste composition of a specific viscosity that is contained in a pump-type toothpaste container including an airless pump and a tube for supplying the toothpaste composition to the airless pump, and that contains a specific amount of thickening silica.

(Patent Document 1) JP 2021-8323 A

The present invention provides a dentifrice comprising an upright bottle container (X) having an airless pump member with a nozzle connected to an upper opening of a container body, the bottle container being filled with a dentifrice composition (Y) at an initial filling rate of less than 100%,
The upright bottle container (X) has a mechanism for sucking in the dentifrice composition (Y) from an inlet (x1-1) via an inlet valve (x1-2) in response to the operation of a pump, and for discharging the dentifrice composition (Y) from a discharge port of a nozzle;
The present invention provides a dentifrice in an upright bottle container (X), in which an intake port (x1-1) is not immersed in a dentifrice composition (Y) before use of the dentifrice is started, and in which the dentifrice composition (Y) has a Helipath viscosity (y1) at 25°C of 1300 dPa·s or more and 5000 dPa·s or less, and a ratio ((y1)/(y2)) of the Helipath viscosity (y1) at 25°C to the B8H viscosity (y2) at 25°C is 1 or more and 4 or less.

Here, the present inventors have newly focused their attention on the problem that when a paste with high shape retention, such as dentifrice, is filled into an upright airless pump container and an attempt is made to eject the dentifrice from the container, air present in the container gets mixed into the dentifrice composition, causing excessive protrusion and other splashing when ejected, particularly when the airless pump container is filled with dentifrice to an initial filling rate of less than 100%.
However, in conventional technologies such as that described in Patent Document 1, improvements are still required in order to sufficiently prevent the agent from protruding or splashing due to air getting into the container when the agent is ejected, while also achieving good ejection properties and shape retention on the toothbrush.

In other words, the present invention relates to a dentifrice in which a dentifrice composition is filled into an upright bottle container using an airless pump, and which is capable of ensuring good ejection properties and shape retention while adequately suppressing splashing.

The inventors therefore conducted extensive research to solve the above problems, and discovered a toothpaste that is filled with a toothpaste composition having specific viscosity characteristics in an upright bottle container with a specific inlet, thereby effectively preventing unwanted splashing and ensuring good ejection properties and shape retention.

The dentifrice in which the dentifrice composition is filled in an upright bottle container of the present invention (hereinafter also referred to as "the dentifrice of the present invention") can effectively prevent splashing such as excessive protrusion caused by air getting into the container, and also exhibits good ejection properties and shape retention, making it possible to experience comfortable and convenient use.

FIG. 1 is a schematic diagram showing one embodiment of an upright bottle constituting a dentifrice of the present invention. 2 is an enlarged view showing an upper opening of the container body in FIG. 1 . This is an enlarged view showing the top opening of the container body in a container having a dip tube disposed at the lower end of an airless pump member, which is one embodiment of an upright bottle constituting the dentifrice of the present invention.

Detailed Description of the Invention

The present invention will be described in detail below.
In the present invention, good "dischargeability" refers to the degree to which the pump can be pressed and the time it takes for the button to return to its original state when discharging the dentifrice composition from an upright bottle container.
Furthermore, "the intake port (x1-1) is not immersed in the dentifrice composition (Y)" means a state in which the intake port (x1-1) is separated from the dentifrice composition (Y) without coming into contact with the dentifrice composition (Y) within the container body of the upright bottle container.

The dentifrice of the present invention is an upright bottle container (X) in which an airless pump member equipped with a nozzle is connected to the top opening of the container body, and dentifrice composition (Y) is filled at an initial filling rate of less than 100%.

The upright bottle container (X) of the present invention is a container comprising a container body having a bottom and a top opening, and an airless pump member equipped with a nozzle connected to the top opening of the container body. That is, as shown in the schematic diagram of Figure 1, the upright bottle container (X) 1 of the present invention has a flow path formed through the top opening 21 of the container body 2 and the airless pump member 3 to the discharge port of the nozzle 32.
Therefore, when in use, by operating the airless pump with container 1 held upright, the toothpaste composition can be easily ejected from nozzle 32, making this a container that contributes to improving usability and convenience.
In addition, the airless pump member 3 is a member equipped with a pump that does not allow air to flow in, and the pressure inside the pump varies in conjunction with the pressure applied to the pump, enabling the toothpaste composition filled in the container body 2 to be sucked into the airless pump member 3 and ejected from the nozzle 32 to the outside in a single operation.
The airless pump member 3 shown in FIG. 1 is a member equipped with a pump 31 having a form known as a "dome-type pump." However, the present invention is not limited to this, and the airless pump member 3 may be a member (not shown) equipped with a pump having a form similar to a piston that presses an upper part downward, or the like, and can be selected as appropriate.

In this way, the upright bottle container (X) 1 has a mechanism that, in conjunction with the operation of the pump 31, sucks in the toothpaste composition from the inlet (x1-1) via the inlet valve (x1-2) and expels the toothpaste composition from the outlet of the nozzle 32. For example, in the form of the upright bottle container (X) 1 shown in FIG. 1, when the pump 31 is operated by pressing the button, etc., the internal pressure of the pump 31 fluctuates, making it possible to operate the inlet valve (x1-2). Specifically, when the internal pressure in the pump increases due to the operation of the pump 31, the inlet valve (x1-2) closes, preventing the inflow of the toothpaste composition, whereas when the internal pressure in the pump decreases, the inlet valve (x1-2) opens, allowing the toothpaste composition to be sucked in from the inlet (x1-1).

In the upright bottle container (X) constituting the present invention, the intake port (x1-1) is not immersed in the dentifrice composition (Y) before starting to use the dentifrice.
When a dip tube is provided at the lower end of the airless pump member, the suction port (x1-1) is the lower end of the dip tube.

Conventional bottle containers are provided with a long dip tube whose lower end reaches near the bottom of the container body. This is to ensure that the contents remaining near the bottom can be sufficiently sucked up and dispensed without waste from the first use of the pump to the last use.
However, in the present invention, in which an "airless pump" without air inflow is used as the pump and the initial filling rate is less than 100% and there is an unfilled area of the dentifrice composition (Y) in the upright bottle container (X), when such a long dip tube is arranged from the lower end of the airless pump member toward the bottom surface of the container body, the intake port is kept immersed in the dentifrice composition in the container. Therefore, as the remaining amount of the dentifrice composition decreases, even the air present in the unfilled area of the dentifrice composition is sucked in together with the dentifrice composition in conjunction with the operation of the pump. As a result, air gets mixed into the dentifrice composition discharged from the nozzle, and the inventor has newly noticed that this is a major factor in the occurrence of splashing such as excessive protrusion.

The inventors therefore first discovered that in the upright bottle container (X) constituting the present invention, in order to effectively prevent unwanted air from being mixed in when the toothpaste composition is discharged, the intake port (x1-1) should be kept not immersed in the toothpaste composition (Y) before starting to use the toothpaste, and the toothpaste composition (Y) having the specific viscosity characteristics described below should be filled into the upright bottle container (X) constituting the present invention. As a result, with the present invention, when starting to use the toothpaste for the first time, it is possible to first discharge the air occupying the unfilled area of the toothpaste composition in the container body by operating the pump several times. Furthermore, after that, not only is it possible to effectively prevent splashing until the toothpaste composition (Y) in the container is used up, but it also makes it possible to achieve good dischargeability and shape retention.

In order to keep the intake port (x1-1) not immersed in the dentifrice composition (Y) before starting to use the dentifrice, the distance (xd) from the intake port (x1-1) to the intake valve (x1-2) is preferably less than 50 mm, more preferably less than 46 mm, even more preferably less than 35 mm, still more preferably less than 25 mm, even more preferably less than 20 mm, still more preferably less than 15 mm, still more preferably less than 10 mm, still more preferably less than 5 mm, and even more preferably less than 1 mm, from the viewpoint of effectively suppressing unnecessary air mixing.
In addition, the diameter of the intake port (x1-1) is preferably 1 mm or more, more preferably 5 mm or more, and is preferably 15 mm or less, more preferably 12 mm or less, from the viewpoint of ensuring the fluidity of the dentifrice composition (Y) having unique viscosity characteristics in the flow path.

In one embodiment of the upright bottle container (X), from the viewpoint of keeping the intake port (x1-1) not immersed in the dentifrice composition (Y) before starting to use the dentifrice, and preferably from the viewpoint of limiting the distance (xd) from the intake port (x1-1) to the intake valve (x1-2) within the above-mentioned range, the intake port (x1-1) is formed by the lower end of a dip tube 33 disposed at the lower end of the airless pump member 3, as shown in FIG. 3.
Alternatively, in another embodiment of the upright bottle container (X), as shown in FIG. 2, a suction port (x1-1) is integrally formed at the lower end of the airless pump member 3 without a dip tube 33 being provided.
As a result, in the dentifrice of the present invention in which the dentifrice composition (Y) is filled at an initial filling rate of less than 100%, it is possible to prevent the intake port (x1-1) from being immersed in the dentifrice composition (Y) before the start of use, and it is possible to expel air occupying areas of the container body that are not filled with the dentifrice composition at the start of initial use, thereby effectively suppressing the occurrence of splashing, such as excessive protrusion, when the dentifrice is discharged.

When the dip tube 33 is disposed at the lower end of the airless pump member 3, the length of the dip tube 33, as the distance from the suction valve (x1-2) to the lower end of the dip tube 33, from the viewpoint of effectively suppressing unnecessary air mixing, is preferably less than 43 mm, more preferably less than 35 mm, even more preferably less than 30 mm, still more preferably less than 20 mm, and even more preferably less than 18 mm.
Even more preferably, the upright bottle container (X) is configured so that no dip tube is provided at the lower end of the airless pump member 3.
From the viewpoints of ensuring smooth fluidity of the composition in the flow path and maintaining good dischargeability, the inner diameter of the suction port (x1-1) is preferably 1 to 15 mm, more preferably 2 to 14 mm, even more preferably 3 to 13 mm, still more preferably 4 to 12 mm, and even more preferably 5 to 11 mm.

In the upright bottle container (X), from the viewpoint of improving usability while maintaining good discharge performance, the maximum pump pressure (x2) is preferably 10N or more, more preferably 20N or more, even more preferably 30N or more, and preferably 100N or less, more preferably 80N or less, even more preferably 50N or less.

The initial filling rate of the dentifrice composition (Y) in the upright bottle container (X) is less than 100%, and may be 50 to 99%, 60 to 95%, 65 to 90%, or 70 to 85%.
The initial filling rate (%) refers to the filling rate (%) of the dentifrice composition (Y) in the container body of the upright bottle container (X) before starting to use the dentifrice of the present invention, and means the volume ratio (%) that the dentifrice composition (Y) occupies when the internal volume of the container body of the upright bottle container (X) is taken as 100%.
Furthermore, when the upright bottle container (X) is in the form of a film container such as a pouch container, and when it is used by setting an airless pump member 3 equipped with a nozzle in the upper opening 21 of the container body as shown in FIG. 1, the internal volume of the container body of the upright bottle container (X), which is the basis for the initial filling rate (%), means the volume of the entire void area in the container body blocked by the airless pump member 3 and the suction valve (x1-2) after setting.

The initial presence rate (%) of air in the upright bottle container (X) in the container body may be more than 1% and less than 50%, more than 5% and less than 40%, more than 10% and less than 45%, or more than 15% and less than 30%.
The initial air presence rate (%) refers to the total amount of air present in the container body of the upright bottle container (X) before starting to use the dentifrice of the present invention, and means the volume percentage (%) of the total amount of air when the internal volume of the upright bottle container (X) is taken as 100%.
Furthermore, when the upright bottle container (X) is in the form of a film container such as a pouch container, and when it is used by setting an airless pump member 3 equipped with a nozzle in the upper opening 21 of the container body as shown in FIG. 1, the internal volume of the container body of the upright bottle container (X), which is the basis for the initial presence rate (%), means the volume of the entire void area in the container body blocked by the airless pump member 3 and the suction valve (x1-2).

The internal volume of the container body of the upright bottle container (X) can be designed appropriately taking usability into consideration, but for example, it is preferably 30 to 1000 mL, more preferably 50 to 500 mL, even more preferably 75 to 300 mL, even more preferably 80 to 250 mL, and even more preferably 90 to 200 mL.

In the upright bottle container (X), the amount (x3) of the toothpaste composition (Y) discharged from the outlet of the nozzle 32 with one depression of the pump is, from the viewpoint of ensuring good usability, preferably 0.1 g or more, more preferably 0.5 g or more, even more preferably 0.75 g or more, even more preferably 0.8 g or more, preferably 10 g or less, more preferably 7 g or less, even more preferably 5 g or less, and even more preferably 4 g or less.

The material of the upright bottle container (X) is preferably flexible enough to deform depending on the amount of dentifrice composition (Y) consumed, such as polyethylene, polypropylene, polyethylene terephthalate, etc. In particular, the material of the button of the pump 31 of the airless pump member 3 as shown in Fig. 1 may be a material that is highly flexible and easily elastically deforms when pressed.
The upright bottle container (X) is preferably in the form of a film container, for example a pouch container, from the standpoint of ease of operation when filling the contents and airtightness.

The dentifrice composition (Y) of the present invention is filled in the above-mentioned upright bottle container (X), and has a Helipath viscosity (y1) at 25°C of 1,300 dPa·s or more and 5,000 dPa·s or less, and a ratio ((y1)/(y2)) of the Helipath viscosity (y1) at 25°C to the B8H viscosity (y2) at 25°C of 1 or more and 4 or less.
Dentifrice composition (Y) having such unique viscosity characteristics is in a cream-like form, and it is possible to effectively suppress the occurrence of splashing, such as excessive protrusion due to the inclusion of air, until the dentifrice composition (Y) in the container is completely used up, and it is possible to exhibit excellent shape retention as well as good ejection properties.

The helipath viscosity (y1) of the dentifrice composition (Y) at 25°C is 1300 dPa·s or more, preferably 1500 dPa·s or more, more preferably 1700 dPa·s or more, even more preferably 2000 dPa·s or more, 5000 dPa·s or less, preferably 4000 dPa·s or less, more preferably 3600 dPa·s or less, even more preferably 3400 dPa·s or less, and even more preferably 3000 dPa·s or less, from the viewpoint of maintaining moderate elasticity as a cream-like composition when filled into the upright bottle container (X), effectively suppressing the occurrence of splashing, and ensuring excellent shape retention while maintaining good ejection properties. The helipath viscosity (y1) of the dentifrice composition (Y) at 25°C is 1300 dPa·s or more and 5000 dPa·s or less, preferably 1300 to 4000 dPa·s, more preferably 1500 to 3600 dPa·s, even more preferably 1700 to 3400 dPa·s, and even more preferably 2000 to 3000 dPa·s.

The B8H viscosity (y2) of the dentifrice composition (Y) at 25°C is preferably 325 dPa·s or more, more preferably 375 dPa·s or more, even more preferably 450 dPa·s or more, still more preferably 880 dPa·s or more, preferably 4000 dPa·s or less, more preferably 3000 dPa·s or less, even more preferably 2500 dPa·s or less, and still more preferably 1500 dPa·s or less, from the viewpoint of maintaining an appropriate viscosity as a cream-like composition when filled into the upright bottle container (X), effectively suppressing the occurrence of splashing, and ensuring excellent shape retention while maintaining good ejection properties. The B8H viscosity (y2) of the dentifrice composition (Y) at 25°C is preferably 325 to 4000 dPa·s, more preferably 375 to 3000 dPa·s, even more preferably 450 to 2500 dPa·s, and even more preferably 880 to 1500 dPa·s.

In the dentifrice composition (Y), the ratio ((y1)/(y2)) of the Helipath viscosity at 25°C (y1) to the B8H viscosity at 25°C (y2) is 1 or more, preferably 1.1 or more, more preferably 1.2 or more, even more preferably 1.3 or more, still more preferably 1.4 or more, and 4 or less, preferably 3.8 or less, more preferably 3.5 or less, even more preferably 3.3 or less, and still more preferably 3.1 or less, from the viewpoint of effectively suppressing the occurrence of splashing such as excessive protrusion due to air mixing until the dentifrice composition (Y) in the container is used up while expressing unique viscosity characteristics as a cream-like composition when filled into the upright bottle container (X) and ensuring good ejection properties and shape retention, and from the viewpoint of preventing unnecessary clogging and enabling smooth continuous operation of the pump. In the dentifrice composition (Y), the ratio ((y1)/(y2)) of the Helipath viscosity at 25°C (y1) to the B8H viscosity at 25°C (y2) is 1 or more and 4 or less, preferably 1.1 to 3.8, more preferably 1.2 to 3.5, even more preferably 1.3 to 3.3, and even more preferably 1.4 to 3.1.

In the dentifrice of the present invention, from the viewpoint of effectively suppressing splashing until the dentifrice composition (Y) in the container is used up, and from the viewpoint of ensuring good ejection properties and shape retention, it is preferable that the dentifrice composition (Y) contains a higher alcohol (yA) and that the ratio ((yA)/(x2)) of the content of component (yA) in the dentifrice composition (Y) to the maximum pump pressure (x2) in the upright bottle container (X) is within a specific range. Specifically, the ratio ((yA)/(x2)) of the content of component (yA) in dentifrice composition (Y) to the maximum pump pressure (x2) in upright bottle container (X) is preferably 0.1 mass%/N or more, more preferably 0.15 mass%/N or more, even more preferably 0.2 mass%/N or more, still more preferably 0.25 mass%/N or more, preferably 0.6 mass%/N or less, more preferably 0.5 mass%/N or less, even more preferably 0.4 mass%/N or less, and still more preferably 0.35 mass%/N or less.

As the higher alcohol (yA) that may be contained in the dentifrice composition (Y), a higher alcohol having 12 to 22 carbon atoms is preferable, and a higher alcohol having 14 to 20 carbon atoms is more preferable. Specifically, one or more types selected from cetanol, stearyl alcohol, lauryl alcohol, myristyl alcohol, and behenyl alcohol are preferable, one or two types selected from cetanol (yA1) and stearyl alcohol (yA2) are more preferable, and it is preferable to contain cetanol (yA1) and stearyl alcohol (yA2).

The content of component (yA) in dentifrice composition (Y) is preferably 2% by mass or more, more preferably 3% by mass or more, even more preferably 4% by mass or more, even more preferably 5% by mass or more, even more preferably 7% by mass or more, preferably 25% by mass or less, more preferably 23% by mass or less, even more preferably 20% by mass or less, even more preferably 18% by mass or less, and even more preferably 14% by mass or less, from the viewpoint of effectively suppressing splashing while maintaining a suitable viscosity as a creamy composition and ensuring good ejection properties and shape retention. The content of component (yA) in dentifrice composition (Y) is preferably 2% by mass or more and 25% by mass or less, more preferably 3 to 23% by mass, even more preferably 4 to 20% by mass, even more preferably 5 to 18% by mass, and even more preferably 7 to 14% by mass.

Here, when the dentifrice composition (Y) contains cetanol (yA1) and stearyl alcohol (yA2) as the component (yA), the mass ratio of the content of the component (yA1) to the content of the component (yA2) ((yA1)/(yA2)) is, from the viewpoint of obtaining a cream-like composition exhibiting unique viscosity characteristics, preferably 0.5 or more, more preferably 0.7 or more, even more preferably 1 or more, preferably 10 or less, more preferably 8 or less, and even more preferably 3.5 or less.
Furthermore, a component (Y) other than the components (yA1) and (yA2) may be contained. Examples of such components include lauryl alcohol, myristyl alcohol, and behenyl alcohol.

From the viewpoint of forming a creamy composition exhibiting unique viscosity characteristics, the dentifrice composition (Y) preferably further contains a nonionic surfactant (yB).
Examples of such component (yB) include one or more selected from sorbitan fatty acid esters such as sorbitan monocaprate, sorbitan monoundecylate, sorbitan monolaurate, sorbitan monotridecylate, sorbitan monomyristate, sorbitan monopalmitate, sorbitan monooleate, sorbitan trioleate, sorbitan tetraoleate, sorbitan sesquioleate, sorbitan monostearate, and sorbitan tristearate; and polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monomyristate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, and polyoxyethylene sorbitan monooleate.
Among these, one or more selected from sorbitan monooleate, sorbitan sesquioleate, sorbitan monostearate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, and polyoxyethylene sorbitan monooleate are preferred, it is more preferred to contain both a sorbitan fatty acid ester and a polyoxyethylene sorbitan fatty acid ester, and among these, it is even more preferred to contain both polyoxyethylene sorbitan monostearate and sorbitan monostearate.

The content of component (yB) in dentifrice composition (Y) is preferably 0.2% by mass or more, more preferably 1% by mass or more, and even more preferably 3% by mass or more, from the viewpoint of effectively suppressing splashing while maintaining a suitable viscosity as a creamy composition and ensuring good ejection properties and shape retention. Furthermore, the content of component (yB) in dentifrice composition (Y) is preferably 10% by mass or less, more preferably 8% by mass or less, and even more preferably 6% by mass or less, from the viewpoint of ensuring the stability of the composition. Furthermore, the content of component (yB) in dentifrice composition (Y) is preferably 0.2 to 10% by mass, more preferably 1 to 8% by mass, and even more preferably 3 to 6% by mass.

The dentifrice composition (Y) may further contain water (yC) in order to obtain a cream-like composition that exhibits unique viscosity characteristics. In the present invention, the water of the component (yC) means the total water contained in the dentifrice composition, including not only the purified water and the like contained in the dentifrice composition, but also the water contained in each of the components contained therein. When the dentifrice composition (Y) contains water (yC), the above-mentioned components are dissolved or dispersed well, and when the dentifrice composition (Y) is filled into an upright bottle container (X) to form a dentifrice, the desired effect can be fully exerted.

The content of component (yC) in dentifrice composition (Y) is preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 55% by mass or more, and preferably 95% by mass or less, more preferably 80% by mass or less, and even more preferably 65% by mass or less. The content of component (yC) in dentifrice composition (Y) is preferably 30-95% by mass, more preferably 40-80% by mass, and even more preferably 55-65% by mass.

The content of component (yC) can be calculated from the amount of water added and the amount of water in the added components, but can also be measured, for example, with a Karl Fischer moisture meter. As a Karl Fischer moisture meter, for example, a trace moisture measuring device (manufactured by Hiranuma Sangyo Co., Ltd.) can be used. With this device, 5 g of the dentifrice composition is suspended in 25 g of anhydrous methanol, and 0.02 g of this suspension is taken to measure the moisture content.

The dentifrice composition (Y) is a creamy composition that exhibits unique viscosity characteristics, and from the viewpoint of ensuring the effect of suppressing splashing, it can contain a fatty acid (yD) having 16 to 18 carbon atoms. Such a component (yD) is preferably a saturated fatty acid, specifically one or two selected from palmitic acid and stearic acid. Of these, stearic acid is preferred.

The content of component (yD) in dentifrice composition (Y) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 0.8% by mass or more, and even more preferably 1.2% by mass or more, from the viewpoints of effectively suppressing splashing while maintaining appropriate viscosity as a creamy composition and ensuring good ejection properties and shape retention. Furthermore, the content of component (yD) in dentifrice composition (Y) is preferably 4% by mass or less, more preferably 3.6% by mass or less, even more preferably 3.2% by mass or less, even more preferably 2.8% by mass or less, and even more preferably 2.4% by mass or less, from the viewpoints of ensuring good usability such as flavor. The content of component (yD) in dentifrice composition (Y) is preferably 0.1% by mass or more and 4% by mass or less, more preferably 0.1 to 3.6% by mass, even more preferably 0.5 to 3.2% by mass, even more preferably 0.8 to 2.8% by mass, and even more preferably 1.2 to 2.4% by mass.

The toothpaste composition (Y) is a cream-like composition that exhibits unique viscosity characteristics, and from the viewpoint of ensuring the effect of suppressing splashing, it can contain one or more elements (yE) selected from sodium hydroxide, potassium hydroxide, and arginine. Of these, sodium hydroxide and potassium hydroxide are preferred.

The content of component (yE) in dentifrice composition (Y) is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.3% by mass or more, and even more preferably 0.4% by mass or more, from the viewpoints of effectively suppressing splashing while maintaining appropriate viscosity as a creamy composition and ensuring good ejection properties and shape retention. Furthermore, the content of component (yE) in dentifrice composition (Y) is preferably 1.6% by mass or less, more preferably 1.4% by mass or less, even more preferably 1.2% by mass or less, even more preferably 1.0% by mass or less, and even more preferably 0.8% by mass or less, from the viewpoints of ensuring a good flavor and other usability. The content of component (yE) in dentifrice composition (Y) is preferably 0.1% by mass or more and 1.6% by mass or less, more preferably 0.1 to 1.4% by mass, even more preferably 0.2 to 1.2% by mass, even more preferably 0.3 to 1.0% by mass, and even more preferably 0.4 to 0.8% by mass.

The dentifrice composition (Y) may further contain a binder and/or a viscosity modifier from the viewpoint of effectively suppressing splashing and ensuring good ejection and shape retention while maintaining an appropriate viscosity as a cream-like composition. Examples of such binders and/or viscosity modifiers include polymer-based binders such as carboxyvinyl polymers and acrylic acid/alkyl (meth)acrylate copolymers; hydroxycellulose derivatives such as hydroxyethyl cellulose, hydroxypropyl cellulose, and hydroxypropyl methylcellulose; and binders and viscosity modifiers other than hydroxycellulose derivatives such as sodium carboxymethylcellulose, carboxyvinyl polymers, ethyl cellulose, sodium alginate, carrageenan, xanthan gum, sodium polyacrylate, pectin, agar, tragacanth gum, gum arabic, guar gum, karaya gum, locust bean gum, gelatin gum, tamalid gum, and psyllium seed gum.

The total content of such binders and viscosity modifiers in the dentifrice composition (Y) is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.03% by mass or more, still more preferably 0.05% by mass or more, preferably 1.2% by mass or less, more preferably 1.1% by mass or less, still more preferably 1.0% by mass or less, and still more preferably 0.9% by mass or less.

Furthermore, from the viewpoint of effectively suppressing the occurrence of splashing and ensuring good ejection properties and shape retention, it is preferable that the content of polyvalent metals selected from strontium, magnesium, aluminum, calcium, zirconium, iron, copper, zinc, and manganese is limited in the dentifrice composition (Y). The content of such polyvalent metals in terms of metal atom amount in the dentifrice composition (Y) is preferably 2% by mass or less, more preferably 1% by mass or less, even more preferably 0.5% by mass or less, and even more preferably 0.1% by mass or less, or it is preferable that the dentifrice composition (Y) is substantially free of polyvalent metals selected from strontium, magnesium, aluminum, calcium, zirconium, iron, copper, zinc, and manganese. In particular, it is preferable to limit the content of copper chlorophyllin sodium, and it is particularly preferable that the dentifrice composition (Y) does not contain copper chlorophyllin sodium.

In the dentifrice composition (Y), it is preferable to limit the content of oily components in order to make the composition a cream-like composition that exhibits specific viscosity characteristics and to ensure the effect of suppressing splashing.
Such oily components refer to components other than the above components (yA) and (yB) that exhibit oil-solubility and are other than surfactants and fragrances, and specific examples thereof include hydrocarbon oils such as liquid paraffin, petrolatum, mineral oil, light liquid paraffin, paraffin wax, ceresin, microcrystalline wax, carnauba wax, beeswax, squalane, and squalene; ester oils such as isopropyl myristate, isopropyl palmitate, propyl adipate, diethyl sebacate, and glycerin fatty acid esters; triglycerides and vegetable oils containing the same, such as olive oil, rapeseed oil, shea butter, and rice bran oil; silicone oils; preservatives such as methyl parahydroxybenzoate and ethyl parahydroxybenzoate; and oil-soluble bactericides.

The content of these oily components in the dentifrice composition (Y) is preferably less than 0.15% by mass, more preferably less than 0.1% by mass, and even more preferably less than 0.05% by mass, or it is preferable that the dentifrice composition (Y) contains substantially no oily components.

Dentifrice composition (Y) may contain, as ingredients other than those mentioned above, sugar alcohols such as sorbitol, xylitol, erythritol, reduced palatinose, and mannitol; humectants such as glycerin; fluorides; medicinal ingredients such as tocopherol acetate and glycyrrhetinic acid; surfactants other than ingredients (yB) and (yD); antibacterial agents such as cetylpyridinium chloride; fragrances; sweeteners; colorants, etc., to the extent that the effects of the present invention are not impaired.

In the toothpaste composition in an upright bottle container of the present invention, from the viewpoint of effectively suppressing unnecessary air mixing when discharging the toothpaste composition (Y) and exhibiting good dischargeability and shape retention, it is preferable that a specific physical property of the upright bottle container (X) and a specific physical property of the toothpaste composition (Y) have a specific relationship. That is, specifically, the ratio ({(x2)×(x1-1)}/{(x1-3)×(x3)×(y1)}) of the product ((x2)×(x1-1)) of the pump pressure (x2) and the inner diameter of the intake port (x1-1) in the upright bottle container (X) to the distance (xd) from the intake port (x1-1) to the intake valve (x1-2), the amount of the toothpaste composition discharged from the outlet by one pressure of the pump (x3), and the Helipath viscosity (y1) of the toothpaste composition (Y) at 25° C. ((x1-3)×(x3)×(y1)) is preferably is 0.0013 N/g·dPa·s or more, more preferably 0.0015 N/g·dPa·s or more, even more preferably 0.0017 N/g·dPa·s or more, even more preferably 0.002 N/g·dPa·s or more, preferably 0.01 N/g·dPa·s or less, more preferably 0.008 N/g·dPa·s or less, even more preferably 0.006 N/g·dPa·s or less, and even more preferably 0.004 N/g·dPa·s or less.

The present invention can further be utilized as the following toothpaste kit.
That is, the dentifrice kit of the present invention is a dentifrice kit comprising an upright bottle container (X) in which an airless pump member equipped with a nozzle is connected to an upper opening of a container body, and a dentifrice composition (Y) having a Helipath viscosity (y1) at 25°C of 1300 dPa·s or more and 5000 dPa·s or less, and a ratio ((y1)/(y2)) of the Helipath viscosity (y1) at 25°C to the B8H viscosity (y2) at 25°C of 1 or more and 4 or less,
The upright bottle container (X) has a mechanism for sucking in the dentifrice composition (Y) from an inlet (x1-1) via an inlet valve (x1-2) in response to the operation of a pump, and for discharging the dentifrice composition (Y) from a discharge port of a nozzle;
The initial filling rate of the dentifrice composition (Y) in the upright bottle container (X) is less than 100%, and in the upright bottle container (X), the intake port (x1-1) is not immersed in the dentifrice composition (Y) before the start of use of the dentifrice kit.

In relation to the above-mentioned embodiment, the present invention further discloses a dentifrice and a dentifrice kit, each of which comprises a dentifrice composition filled in an upright bottle container, as described below.
[1] A dentifrice comprising an upright bottle container (X) having an airless pump member with a nozzle connected to an upper opening of a container body, and a dentifrice composition (Y) filled in the bottle container at an initial filling rate of less than 100%,
The upright bottle container (X) has a mechanism for sucking in the dentifrice composition (Y) from an inlet (x1-1) via an inlet valve (x1-2) in response to the operation of a pump, and for discharging the dentifrice composition (Y) from a discharge port of a nozzle;
In the upright bottle container (X), the inlet (x1-1) is not immersed in the dentifrice composition (Y) before starting to use the dentifrice,
A dentifrice composition (Y) having a Helipath viscosity (y1) at 25°C of 1,300 dPa·s or more and 5,000 dPa·s or less, and a ratio ((y1)/(y2)) of the Helipath viscosity (y1) at 25°C to the B8H viscosity (y2) at 25°C of 1 or more and 4 or less.
[2] The dentifrice of [1] above, wherein in the upright bottle container (X), the distance (xd) from the intake port (x1-1) to the intake valve (x1-2) is preferably less than 50 mm, more preferably less than 46 mm, even more preferably less than 35 mm, still more preferably less than 25 mm, even more preferably less than 20 mm, even more preferably less than 15 mm, even more preferably less than 10 mm, even more preferably less than 5 mm, and even more preferably less than 1 mm.

[3] Dentifrice according to [1] or [2] above, in which, when a dip tube is disposed at the lower end of the airless pump member of the upright bottle container (X), the length of such dip tube, as measured from the suction valve (x1-2) to the lower end of the dip tube, is preferably less than 43 mm, more preferably less than 35 mm, even more preferably less than 30 mm, still more preferably less than 20 mm, and even more preferably less than 18 mm.
[4] The dentifrice according to any one of [1] to [3] above, further preferably wherein the upright bottle container (X) is configured such that no dip tube is provided at the lower end of the airless pump member 3.
[5] The dentifrice according to any one of [1] to [4] above, wherein in the upright bottle container (X), the maximum pump pressure (x2) is preferably 10 N or more, more preferably 20 N or more, even more preferably 30 N or more, and is preferably 100 N or less, more preferably 80 N or less, and even more preferably 50 N or less.
[6] The dentifrice according to any one of [1] to [5] above, wherein the initial filling rate of the dentifrice composition (Y) in the upright bottle container (X) is less than 100%, and may be 50 to 99%, 60 to 95%, 65 to 90%, or 70 to 85%.
[7] The dentifrice according to any one of the above [1] to [6], wherein the upright bottle container (X) is preferably in the form of a film container, more preferably in the form of a pouch container.

[8] Any one of the above [1] to [7] dentifrices, wherein the Helipath viscosity (y1) of the dentifrice composition (Y) at 25°C is preferably 1500 dPa·s or more, more preferably 1700 dPa·s or more, even more preferably 2000 dPa·s or more, preferably 4000 dPa·s or less, more preferably 3600 dPa·s or less, even more preferably 3400 dPa·s or less, and still more preferably 3000 dPa·s or less.
[9] Any one of the above [1] to [8] dentifrices, wherein the B8H viscosity (y2) of the dentifrice composition (Y) is preferably 325 dPa·s or more, more preferably 375 dPa·s or more, even more preferably 450 dPa·s or more, still more preferably 880 dPa·s or more, preferably 4000 dPa·s or less, more preferably 3000 dPa·s or less, even more preferably 2500 dPa·s or less, and still more preferably 1500 dPa·s or less.
[10] Any one of the above dentifrices [1] to [9], wherein in the dentifrice composition (Y), the ratio of the Helipath viscosity at 25°C (y1) to the B8H viscosity at 25°C (y2) ((y1)/(y2)) is preferably 1.1 or more, more preferably 1.2 or more, even more preferably 1.3 or more, still more preferably 1.4 or more, and preferably 3.8 or less, more preferably 3.5 or less, even more preferably 3.3 or less, and still more preferably 3.1 or less.

[11] Any one of the above dentifrices [1] to [10], wherein the dentifrice composition (Y) contains a higher alcohol (yA), and the ratio ((yA)/(x2)) of the content of component (yA) in the dentifrice composition (Y) to the maximum pump pushing force (x2) in the upright bottle container (X) is preferably 0.1 mass%/N or more, more preferably 0.15 mass%/N or more, even more preferably 0.2 mass%/N or more, still more preferably 0.25 mass%/N or more, preferably 0.6 mass%/N or less, more preferably 0.5 mass%/N or less, even more preferably 0.4 mass%/N or less, and still more preferably 0.35 mass%/N or less.
[12] The dentifrice of [11] above, wherein the higher alcohol (yA) is preferably a higher alcohol having 12 to 22 carbon atoms, more preferably a higher alcohol having 14 to 20 carbon atoms, and specifically, preferably one or more selected from cetanol, stearyl alcohol, lauryl alcohol, myristyl alcohol, and behenyl alcohol, and more preferably one or two selected from cetanol (yA1) and stearyl alcohol (yA2).
[13] The dentifrice of [11] or [12] above, wherein the content of component (yA) in dentifrice composition (Y) is preferably 2% by weight or more, more preferably 3% by weight or more, even more preferably 4% by weight or more, still more preferably 5% by weight or more, still more preferably 7% by weight or more, preferably 25% by weight or less, more preferably 23% by weight or less, still more preferably 20% by weight or less, still more preferably 18% by weight or less, and still more preferably 14% by weight or less.
[14] Any one of the above dentifrices [11] to [13], wherein when the dentifrice composition (Y) contains cetanol (yA1) and stearyl alcohol (yA2) as the component (yA), the mass ratio of the content of the component (yA1) to the content of the component (yA2) ((yA1)/(yA2)) is preferably 0.5 or more, more preferably 0.7 or more, even more preferably 1 or more, preferably 10 or less, more preferably 8 or less, and even more preferably 3.5 or less.

[15] Any one of the above dentifrices [1] to [14], wherein the dentifrice composition (Y) further contains a nonionic surfactant (yB), and the content of component (yB) in the dentifrice composition (Y) is preferably 0.2% by mass or more, more preferably 1% by mass or more, even more preferably 3% by mass or more, preferably 10% by mass or less, more preferably 8% by mass or less, and even more preferably 6% by mass or less.
[16] The dentifrice of [15] above, wherein component (yB) is preferably one or more selected from sorbitan monooleate, sorbitan sesquioleate, sorbitan monostearate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate and polyoxyethylene sorbitan monooleate, more preferably contains both a sorbitan fatty acid ester and a polyoxyethylene sorbitan fatty acid ester, and even more preferably contains both polyoxyethylene sorbitan monostearate and sorbitan monostearate.
[17] The dentifrice composition (Y) preferably further contains water (yC), and the content of component (yC) is preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 55% by mass or more, preferably 95% by mass or less, more preferably 80% by mass or less, even more preferably 65% by mass or less. Any one of the above [1] to [16].
[18] In the dentifrice composition (Y), the content of the polyvalent metal selected from strontium, magnesium, aluminum, calcium, zirconium, iron, copper, zinc, and manganese, in terms of metal atom, is preferably 2 mass% or less, more preferably 1 mass% or less, even more preferably 0.5 mass% or less, and even more preferably 0.1 mass% or less; or the dentifrice composition (Y) is preferably substantially free of a polyvalent metal selected from strontium, magnesium, aluminum, calcium, zirconium, iron, copper, zinc, and manganese. Any one of the dentifrices [1] to [17] above.
[19] In the dentifrice composition (Y), the content of the oily component is preferably less than 0.15% by mass, more preferably less than 0.1% by mass, and even more preferably less than 0.05% by mass. Alternatively, it is preferable that the dentifrice composition (Y) is substantially free of an oily component. Any one of the dentifrices [1] to [18] above.

[20] In the dentifrice composition (Y), it is preferable to contain a saturated fatty acid (yD) having 16 to 18 carbon atoms, and the content of component (yD) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, even more preferably 0.8% by mass or more, still more preferably 1.2% by mass or more, preferably 4% by mass or less, more preferably 3.6% by mass or less, even more preferably 3.2% by mass or less, still more preferably 2.8% by mass or less, and even more preferably 2.4% by mass or less.
[21] The dentifrice of any one of [1] to [20] above, wherein the dentifrice composition (Y) preferably contains one or more components (yE) selected from sodium hydroxide, potassium hydroxide, and arginine, and the content of component (yE) is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.3% by mass or more, still more preferably 0.4% by mass or more, preferably 1.6% by mass or less, more preferably 1.4% by mass or less, even more preferably 1.2% by mass or less, still more preferably 1.0% by mass or less, and even more preferably 0.8% by mass or less.
[22] In the dentifrice composition (Y), the total content of the binder and the viscosity modifier is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.03% by mass or more, still more preferably 0.05% by mass or more, preferably 1.2% by mass or less, more preferably 1.1% by mass or less, even more preferably 1.0% by mass or less, and still more preferably 0.9% by mass or less.

[23] In an upright bottle container (X), the ratio ((x2) x (x1-1)) of the product of the pump pressure (x2) and the inner diameter of the intake port (x1-1), the distance (xd) from the intake port (x1-1) to the intake valve (x1-2), the amount of dentifrice composition discharged from the outlet by one pump pressure (x3), and the Helipath viscosity (y1) of the dentifrice composition (Y) at 25°C ((x1-3) x (x3) x (y1)) is preferably 0.0013 N/g dP. The dentifrice of any one of [1] to [22] above, having a viscosity of 0.0015 N/g dPa s or more, more preferably 0.0017 N/g dPa s or more, even more preferably 0.002 N/g dPa s or more, preferably 0.01 N/g dPa s or less, more preferably 0.008 N/g dPa s or less, even more preferably 0.006 N/g dPa s or less, and even more preferably 0.004 N/g dPa s or less.
[24] A dentifrice kit comprising an upright bottle container (X) in which an airless pump member equipped with a nozzle is connected to an upper opening of a container body, and a dentifrice composition (Y) having a Helipath viscosity (y1) at 25°C of 1300 dPa·s or more and 5000 dPa·s or less, and a ratio ((y1)/(y2)) of the Helipath viscosity (y1) at 25°C to the B8H viscosity (y2) at 25°C of 1 or more and 4 or less,
The upright bottle container (X) has a mechanism for sucking in the dentifrice composition (Y) from an inlet (x1-1) via an inlet valve (x1-2) in response to the operation of a pump, and for discharging the dentifrice composition (Y) from a discharge port of a nozzle;
This dentifrice kit has an initial filling rate of the dentifrice composition (Y) in an upright bottle container (X) of less than 100%, and an intake port (x1-1) of the upright bottle container (X) is not immersed in the dentifrice composition (Y) before starting to use the dentifrice kit.

The present invention will now be described in detail with reference to examples. Unless otherwise indicated in the table, the content of each component in the dentifrice composition is expressed as mass %.

[Examples 1 to 8, Comparative Examples 1 to 3]
As upright bottle containers, the following containers A and B (both of which are containers not equipped with a dip tube as shown in FIG. 1) were used for Examples 1 to 8 and Comparative Examples 1 and 2, and container C (a container equipped with a dip tube, dip tube length: 40 mm, xd: 46 mm) was used for Comparative Example 3.
Each dentifrice composition was prepared according to the recipe shown in Table 1, and then the resulting dentifrice composition was appropriately filled into each upright bottle container (filling rate: 82.7%). Then, each measurement and evaluation was carried out according to the following methods. However, the value of the ratio ((yA)/(x2)) and the value of the ratio ({(x2)×(x1−1)}/{(xd)×(x3)×(y1)}) were calculated based on the value of container A.
In addition, in the case of containers A and B, the intake port (x1-1) was not immersed in the filled dentifrice composition before use, whereas in the case of container C, the intake port was immersed in the filled dentifrice composition before use.
The results are shown in Table 1.

Upright bottle container
・Container A
Distance (xd): 18 mm
Inner diameter of intake port (x1-1): 9 mm
Maximum pump pressure (x2): 38N
Filling rate: 82.7%
・Container B
Distance (xd): 18 mm
Inner diameter of intake port (x1-1): 9 mm
Maximum pump pressure (x2): 23.5N
Filling rate: 82.7%
・Container C
Distance (xd): 56 mm
Inner diameter of intake port (x1-1): 7 mm
Maximum pump pressure (x2): 23.5N
Filling rate: 82%

<Maximum pump pressure>
Using a compression tester (M1000E, manufactured by Mecmeshin), the center of the pump button was pressed under the following conditions, and the maximum pressing force (N) from the start of pressing until the button was completely pressed was measured as the maximum pressing force of the pump.
Indenter: circular indenter with a radius of 1 cm. Pressure point: center of pump button. Compression speed: 50 mm/min.

Helipath Viscosity
Each of the obtained dentifrice compositions was packed into a container for viscosity measurement and stored in an incubator at 25°C for 24 hours. After that, the viscosity was measured using a Helipath type viscometer (VISCOMETER TVB-10, manufactured by Toki Sangyo Co., Ltd.) under the conditions of rotor TC, rotation speed of 2.5 rpm, and time of 1 minute.

<B8H Viscosity>
Each of the obtained dentifrice compositions was packed into a container for viscosity measurement and stored in an incubator at 25°C for 24 hours. Thereafter, the viscosity was measured using a B8H type viscometer (TVB-10R, manufactured by Toki Sangyo Co., Ltd.) under conditions of rotor H7, rotation speed of 2.5 rpm, and time of 1 minute.

《Prevents splashing during dispensing》
The container body of each upright bottle container was filled with 100 g of each dentifrice composition shown in Table 1, and then an airless pump member was attached, the container was sealed, and stored for 24 hours at 25° C. The upright bottle container was placed so that the tip of the discharge outlet was at a height of 150 mm from the surface on which the bottle container was placed, and the pump part was pressed and the discharge operation was repeated until the remaining amount was approximately 10 g.
The number of times the dentifrice composition landed at a position 35 mm or more away from the tip of the discharge port in a straight line was counted as the "number of splashes," and the splash-inhibiting effect was evaluated according to the following criteria. A larger value based on the following criteria means that the splash-inhibiting effect is more effectively exerted.
5: Number of splashes is 0 or more and less than 15 times 4: Number of splashes is 15 or more and less than 25 times 3: Number of splashes is 25 or more and less than 35 times 2: Number of splashes is 35 or more and less than 45 times 1: Number of splashes is 45 times or more

Shape retention
The container body of each upright bottle container was filled with 100 g of each dentifrice composition shown in Table 1, and then an airless pump member was attached, the container was sealed, and stored for 24 hours at 25° C. Next, about 2 g of the dentifrice composition was discharged from the discharge port of the bottle container onto the tip of the toothbrush bristles, and the toothbrush was tilted by 90° so that the direction of the toothbrush bristles was parallel to the arrangement surface of the bottle container.
The time from when the toothbrush was tilted until the toothpaste composition fell off the toothbrush was measured, or the fluidity of the toothpaste composition was visually confirmed at that time, and the shape retention of the toothpaste composition was evaluated according to the following criteria. The larger the value based on the following criteria, the better the shape retention of the toothpaste composition.
5: Did not flow at all and did not fall off the toothbrush. 4: Flowed in 30 seconds, but did not fall off the toothbrush. 3: Fall off the toothbrush in 10 to 30 seconds. 2: Fall off the toothbrush in less than 10 seconds. 1: Fall off the toothbrush immediately after tilting the toothbrush.

<Extrusion ability>
100 g of each dentifrice composition shown in Table 1 was filled into the container body of each upright bottle container, and then an airless pump member was attached, the container was sealed, and stored for 24 hours at 25° C. Next, when the center of the pump button was fully pressed in, the pressing strength of the button was sensorily evaluated according to the following criteria.
Evaluation criteria: 5: The button was pressed lightly. 4: The button was pressed somewhat lightly. 3: The button was pressed somewhat hard. 2: The button was difficult to press. 1: The button was difficult to press, and the button could not be returned to its original position.

<Operability after dispensing>
The container body of each upright bottle container was filled with 100 g of each dentifrice composition shown in Table 1, and then an airless pump member was attached, sealed, and stored at 25° C. for 24 hours. Next, the center of the pump button was fully pressed once, and the time until the button returned to its original state was measured, and this was used as an index for evaluating the operability of the upright bottle container dentifrice composition after ejection according to the following criteria. The larger the value based on the following criteria, the better the fluidity of the dentifrice composition in the flow path, and the more effectively the dentifrice composition in the container can be used up while maintaining good ejection properties.
5: Quickly returns to original state 4: Returns to original state in 1 to less than 3 seconds 3: Returns to original state in 3 to less than 4 seconds 2: Returns to original state in 4 to less than 60 seconds 1: Does not return to original state even after 60 seconds or more have passed

1: Dentifrice 2: Container body 21: Top opening of container body 3: Airless pump member 31: Pump 32: Nozzle 33: Dip tube x1-1: Inlet port x1-2: Inlet valve xd: Distance from inlet port to inlet valve

Claims

A dentifrice comprising an upright bottle container (X) having an airless pump member with a nozzle connected to an upper opening of a container body, the bottle container being filled with a dentifrice composition (Y) at an initial filling rate of less than 100%,
The upright bottle container (X) has a mechanism for sucking in the dentifrice composition (Y) from an inlet (x1-1) via an inlet valve (x1-2) in response to the operation of a pump, and for discharging the dentifrice composition (Y) from a discharge port of a nozzle;
In the upright bottle container (X), the inlet (x1-1) is not immersed in the dentifrice composition (Y) before starting to use the dentifrice,
A dentifrice composition (Y) having a Helipath viscosity (y1) at 25°C of 1,300 dPa·s or more and 5,000 dPa·s or less, and a ratio ((y1)/(y2)) of the Helipath viscosity (y1) at 25°C to the B8H viscosity (y2) at 25°C of 1 or more and 4 or less.
The dentifrice according to claim 1, in which the maximum pump pressure (x2) is 10N or more and 100N or less in an upright bottle container (X).
The dentifrice according to claim 1 or 2, in which the amount (x3) of the dentifrice composition (Y) discharged from the discharge port by one pressure of the pump is 0.1 g or more and 10 g or less.
The dentifrice according to any one of claims 1 to 3, wherein the dentifrice composition (Y) contains a higher alcohol (yA), and the ratio ((yA)/(x2)) of the content of the component (yA) in the dentifrice composition (Y) to the maximum pump pressure (x2) in the upright bottle container (X) is 0.1% by mass/N or more and 0.6% by mass/N or less.
The dentifrice according to any one of claims 1 to 4, wherein the ratio ({(x2) x (x1-1)}/{(xd) x (x3) x (y1)}) of the product ((x2) x (x1-1)) of the maximum pump pressure (x2) and the inner diameter of the intake port (x1-1) in the upright bottle container (X), the distance (xd) from the intake port (x1-1) to the intake valve (x1-2), the amount of dentifrice composition discharged from the outlet port by one pressure of the pump (x3), and the Helipath viscosity (y1) of the dentifrice composition (Y) at 25°C is 0.0013 N/g dPa s or more and 0.01 N/g dPa s or less.
A dentifrice kit comprising: an upright bottle container (X) in which an airless pump member equipped with a nozzle is connected to an upper opening of a container body; and a dentifrice composition (Y) having a Helipath viscosity (y1) at 25°C of 1300 dPa·s or more and 5000 dPa·s or less, and a ratio ((y1)/(y2)) of the Helipath viscosity (y1) at 25°C to the B8H viscosity (y2) at 25°C of 1 or more and 4 or less,
The upright bottle container (X) has a mechanism for sucking in the dentifrice composition (Y) from an inlet (x1-1) via an inlet valve (x1-2) in response to the operation of a pump, and for discharging the dentifrice composition (Y) from a discharge port of a nozzle;
This dentifrice kit has an initial filling rate of the dentifrice composition (Y) in an upright bottle container (X) of less than 100%, and an intake port (x1-1) of the upright bottle container (X) is not immersed in the dentifrice composition (Y) before starting to use the dentifrice kit.