Teeth cleaning

Abstract

This invention relates to a dental cleaning agent that, when filled with a dental cleaning composition into an upright bottle container using an airless pump, effectively suppresses air bubble entrainment and ensures good sprayability and shape retention. Specifically, the dental cleaning agent of this invention is formed by filling a dental cleaning composition (Y) into an upright bottle container (X) with an airless pump component having a nozzle connected to an opening on the upper surface of the container body, at an initial filling rate of less than 100%. In the upright bottle container (X), the suction port (x1-1) is in a specific state, and in the dental cleaning composition (Y), the content of water-insoluble powder is less than 5% by mass. The ratio of Helipath viscosity (y1) to B8H viscosity (y2) at 25°C is a specific value.

Description

Technical Field

[0001] The present invention relates to a dentifrice prepared by filling a dentifrice composition into an upright bottle container. Prior Art

[0002] Toothpaste filled in a container equipped with a pump can be easily dispensed by simply pressing the pump. Using an "airless pump"—one that doesn't allow air to flow in—has the advantage of preventing the contents from deteriorating compared to an air-injection pump. For example, Patent Document 1 discloses a toothpaste composition of a specific viscosity, which 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 contains a specific amount of silica for thickening.

[0003] (Patent Document 1) Japanese Patent Application Laid-Open No. 2021-8323 Summary of the Invention

[0004] The present invention provides a dentifrice, which is obtained by filling a dentifrice composition (Y) into an upright bottle container (X) having an airless pump member equipped with a nozzle connected to an opening on the upper surface of the container body at an initial filling rate less than 100%. The upright bottle container (X) has the following mechanism: in conjunction with the operation of the pump, the tooth cleaning composition (Y) is sucked in from the suction port (x1-1) through the suction valve (x1-2), and the tooth cleaning composition (Y) is ejected from the nozzle outlet. In the upright bottle container (X), before the use of the toothpaste begins, the suction port (x1-1) is not immersed in the toothpaste composition (Y). In the dentifrice composition (Y), the content of the water-insoluble powder (yx) is less than 5% by mass, or the water-insoluble powder (yx) is absent, the Helipath viscosity (y1) at 25°C is from 1300 dPa·s to 3000 dPa·s, and the ratio ((y1) / (y2)) of the Helipath viscosity (y1) at 25°C to the B8H viscosity (y2) at 25°C is from 0.3 to less than 1.

[0005] The present inventors have focused on the following problem: when a highly form-retaining paste such as a dentifrice is filled into an upright airless pump container and then the dentifrice is ejected from the container, particularly when the airless pump container is filled with the dentifrice at an initial filling rate of less than 100%, air present in the container is mixed into the dentifrice composition, causing air bubble entrainment during ejection. However, in the prior art such as the above-mentioned Patent Document 1, there is still a need for improvement in order to fully suppress the entrainment of bubbles during the spraying while also achieving good spraying properties and shape retention on the toothbrush.

[0006] The present invention relates to a dentifrice prepared by filling a dentifrice composition into an upright bottle container using an airless pump, which can fully suppress the occurrence of air bubble entrapment and ensure good spraying properties or shape retention.

[0007] The present inventors have conducted intensive research to address the above-mentioned issues and have discovered that by filling an upright bottle container with a specific suction port with a restricted content of a water-insoluble powder and a specific viscosity, a dentifrice can be obtained that effectively suppresses unnecessary air bubble entrapment and ensures excellent sprayability and shape retention.

[0008] The dentifrice formed by filling an upright bottle container with a dentifrice composition according to the present invention (hereinafter referred to as the "dentifrices of the present invention") effectively suppresses the incorporation of air from the container into the dentifrice composition during dispensing, thereby preventing unwanted air bubbles from forming and excessive stringing or unnecessary sagging. The dentifrice exhibits excellent dispensability and shape retention, resulting in a comfortable and convenient user experience. Simple diagram description

[0009] FIG1 is a schematic diagram showing one embodiment of a vertical bottle constituting the dentifrice of the present invention. FIG2 is an enlarged view showing the opening of the upper surface of the container body in FIG1. FIG3 is an enlarged view of the opening on the upper surface of the container body in a container in which a dipping tube is disposed at the lower end of an airless pump member, which is one embodiment of the upright toothpaste bottle of the present invention. Implementation Method

[0010] Hereinafter, the present invention will be described in detail. Furthermore, in the present invention, good "dispensability" also includes the following: when dispensing the toothpaste composition from an upright bottle container, the pump is easily pressed (extrudability), the composition in the nozzle outlet is prevented from dripping or forming strings between the nozzle and the dispensing destination, and the composition is prevented from being unnecessarily fixed to the nozzle outlet or flow path, thereby maintaining smooth dispensing (temporal dispensing stability). Furthermore, "entrained air bubbles" refers to a state in which air is mixed into the toothpaste composition sprayed from the upright bottle container and is entrained in the toothpaste composition in the form of bubbles, thereby impairing the feel during use. Furthermore, "a state in which the suction port (x1-1) is not immersed in the toothpaste composition (Y)" means a state in which the suction port (x1-1) is not in contact with the toothpaste composition (Y) but is separated from the toothpaste composition (Y) in the container body of the upright bottle container.

[0011] The dentifrice of the present invention is prepared by filling a dentifrice composition (Y) into an upright bottle container (X) having an airless pump member equipped with a nozzle connected to an opening on the upper surface of the container body at an initial filling rate of less than 100%.

[0012] The upright bottle container (X) of the present invention comprises a container body having a bottom surface and an upper surface opening, and an airless pump member equipped with a nozzle attached to the upper surface opening of the container body. Specifically, as shown schematically in FIG1 , the upright bottle container (X) 1 of the present invention forms a flow path through the upper surface opening 21 of the container body 2 and the airless pump member 3, leading to the discharge port of the nozzle 32. Therefore, when in use, if the airless pump is operated while the container 1 is kept upright, the tooth cleaning composition can be easily sprayed out from the nozzle 32, which helps to improve the usability and convenience of the container. The airless pump member 3 is a member equipped with a pump that does not allow air to flow in. The pressure inside the pump fluctuates in conjunction with the pressing of the pump. As a series of operations, the toothpaste composition filled in the container body 2 is drawn into the airless pump member 3 and ejected from the nozzle 32 to the outside. Furthermore, the airless pump component 3 shown in Figure 1 is a component having a pump 31 in the form of a so-called "dome-shaped pump", but the present invention is not limited to this. It can also be a component having a pump in the form of a piston that presses the upper part downward (not shown), etc., which can be appropriately selected.

[0013] Thus, the upright bottle container (X) 1 has a mechanism that, in conjunction with the operation of the pump 31, draws the toothpaste composition from the suction port (x1-1) through the suction valve (x1-2) and discharges the toothpaste composition from the discharge port of the nozzle 32. For example, in the upright bottle container (X) 1 shown in FIG1 , when the pump 31 is operated by, for example, pressing a button, the internal pressure of the pump 31 fluctuates, causing the suction valve (x1-2) to operate. Specifically, if the internal pressure within the pump increases due to the operation of the pump 31, the suction valve (x1-2) closes, preventing the toothpaste composition from flowing in. On the other hand, if the internal pressure within the pump decreases, the suction valve (x1-2) opens, allowing the toothpaste composition to be drawn in from the suction port (x1-1).

[0014] In the upright bottle container (X) constituting the present invention, before the use of the dentifrice, the suction port (x1-1) is in a state of not being immersed in the dentifrice composition (Y). Furthermore, when the immersion pipe is arranged at the lower end of the air pump component, the suction port (x1-1) is set as the lower end of the immersion pipe.

[0015] Previous bottle containers were equipped with a dip tube, which was long enough for the lower end to reach the bottom of the container. This was done to ensure that even a small amount of liquid remaining near the bottom could be fully aspirated from the first use of the pump until the end, without wasting it. However, in the present invention, where an "airless pump" without air inflow is used as the pump, the initial filling rate is less than 100%, and there is an unfilled area of ​​the toothpaste composition (Y) within the upright bottle container (X), if such a long dipping tube is arranged from the lower end of the airless pump member toward the bottom surface of the container body, the suction port remains immersed in the toothpaste composition within the container. Therefore, as the remaining amount of toothpaste composition decreases, the air in the unfilled area of ​​the toothpaste composition is also sucked in along with the toothpaste composition in conjunction with the operation of the pump. As a result, the present inventors have newly focused on the issue of air entrainment in the toothpaste composition ejected from the nozzle, which is the primary cause of unnecessary and uncomfortable air bubble entrainment.

[0016] Therefore, the present inventors discovered that, in order to effectively suppress unwanted air bubble entrapment in the discharged dentifrice composition in the upright bottle container (X) of the present invention, the inlet (x1-1) should be kept clear of the dentifrice composition (Y) before use, and the dentifrice composition (Y) containing a limited amount of water-insoluble powder and having specific viscosity characteristics should be filled therein. As a result, according to the present invention, at the beginning of the first use of the dentifrice, air occupying the unfilled area of ​​the dentifrice composition in the container body can be preemptively expelled by a few pump operations. Furthermore, not only is air bubble entrapment effectively suppressed until the dentifrice composition (Y) in the container is completely used, but excellent sprayability and shape retention are also achieved.

[0017] In order to ensure that the suction port (x1-1) is not immersed in the toothpaste composition (Y) before the use of the toothpaste begins, from the perspective of effectively suppressing the entrainment of useless bubbles, the distance (xd) from the suction port (x1-1) to the suction valve (x1-2) is preferably less than 50 mm, more preferably less than 46 mm, further preferably less than 35 mm, further preferably less than 25 mm, further preferably less than 20 mm, further preferably less than 15 mm, further preferably less than 10 mm, further preferably less than 5 mm, and further preferably less than 1 mm. In addition, from the perspective of ensuring the fluidity of the toothpaste composition (Y) having specific viscosity characteristics in the flow path, the diameter of the suction port (x1-1) is preferably 1 mm or more, more preferably 5 mm or more, and preferably 15 mm or less, more preferably 12 mm or less.

[0018] In one embodiment of the upright bottle container (X), from the perspective of keeping the suction port (x1-1) in a state where it is not immersed in the toothpaste composition (Y) before the use of the toothpaste begins, and from the perspective of limiting the distance (xd) from the suction port (x1-1) to the suction valve (x1-2) to within the above-mentioned range, it is preferred that the suction port (x1-1) be formed by the lower end of the immersion tube 33 provided at the lower end of the airless pump member 3 as shown in Figure 3. Alternatively, in another embodiment of the upright bottle container (X), as shown in FIG. 2 , without providing a dipping tube 33 , a suction port ( x1 - 1 ) is integrally formed at the lower end of the airless pump member 3 . Thus, in the dentifrice of the present invention filled with the dentifrice composition (Y) at an initial filling rate of less than 100%, it is possible to avoid the suction port (x1-1) being immersed in the dentifrice composition (Y) before use, and to expel air occupying the unfilled area of ​​the dentifrice composition in the container body at the beginning of the first use, thereby effectively suppressing the entrapment of unnecessary bubbles during spraying.

[0019] In the case where an immersion tube 33 is provided at the lower end of the airless pump member 3, from the viewpoint of effectively suppressing the entrainment of useless bubbles, the length of the immersion tube 33, measured as the distance from the suction valve (x1-2) to the lower end of the immersion tube 33, is preferably less than 43 mm, more preferably less than 35 mm, further preferably less than 30 mm, further preferably less than 20 mm, and further preferably less than 18 mm. It is further preferred that the upright bottle container (X) is configured such that no dipping tube is provided at the lower end of the airless pump member 3 . From the perspective of ensuring smooth fluidity of the composition in the flow path and maintaining good ejection properties, the inner diameter of the suction port (x1-1) is preferably 1 to 15 mm, more preferably 2 to 14 mm, further preferably 3 to 13 mm, further preferably 4 to 12 mm, and further preferably 5 to 11 mm.

[0020] In the upright bottle container (X), from the viewpoint of maintaining good spraying properties and improving usability, the maximum pressure (x2) of the pump is preferably 10 N or more, more preferably 20 N or more, and further preferably 30 N or more, and preferably 100 N or less, more preferably 80 N or less, and further preferably 50 N or less.

[0021] The initial filling rate of the toothpaste composition (Y) in the upright bottle container (X) is less than 100%, and may be 50-99%, 60-95%, 65-90%, or 70-85%. Furthermore, the initial filling rate (%) refers to the filling rate (%) of the toothpaste composition (Y) in the container body of the upright bottle container (X) before the use of the toothpaste of the present invention begins, which means the volume ratio (%) occupied by the toothpaste composition (Y) when the internal volume of the container body of the upright bottle container (X) is set to 100%. In addition, when the upright bottle container (X) is in the form of a film container such as a bag container, as shown in Figure 1, when the airless pump component 3 with a nozzle is installed on the upper surface opening 21 of the container body, the internal volume of the container body of the upright bottle container (X) used as the basis for the initial filling rate (%) refers to the volume of the total void area in the container body covered by the installed airless pump component 3 and the suction valve (x1-2).

[0022] The initial presence rate (%) of air in the upright bottle container (X) in the container body may be greater than 1% and less than 50%, greater than 5% and less than 40%, greater than 10% and less than 45%, or greater than 15% and less than 30%. Furthermore, the initial air presence ratio (%) represents the total amount of air present in the container body of the upright bottle container (X) before the use of the dentifrice of the present invention begins, and means the volume ratio (%) of the total amount of air when the internal volume of the upright bottle container (X) is set to 100%. In addition, when the upright bottle container (X) is in the form of a film container such as a bag container, as shown in Figure 1, when an airless pump component 3 with a nozzle is installed on the upper surface opening 21 of the container body, the internal volume of the container body of the upright bottle container (X) used as the basis for the initial existence rate (%) refers to the volume of the total void area in the container body blocked by the airless pump component 3 and the suction valve (x1-2).

[0023] The internal volume of the container body of the upright bottle container (X) can be appropriately designed in consideration of usability, and is, for example, preferably 30 to 1000 ml, more preferably 50 to 500 ml, further preferably 75 to 300 ml, further preferably 80 to 250 ml, and further preferably 90 to 200 ml.

[0024] In the upright bottle container (X), from the viewpoint of ensuring good usability, the amount (x3) of the toothpaste composition (Y) ejected from the ejection port of the nozzle 32 by one press of the pump is preferably 0.1 g or more, more preferably 0.5 g or more, further preferably 0.75 g or more, further preferably 0.8 g or more, and preferably 10 g or less, more preferably 7 g or less, further preferably 5 g or less, further preferably 4 g or less.

[0025] The material of the upright bottle container (X) is preferably flexible enough to deform according to the amount of dentifrice composition (Y) consumed, and examples thereof include polyethylene, polypropylene, and polyethylene terephthalate. The button of the pump 31 of the airless pump assembly 3 shown in FIG1 can also be made of a material that is highly flexible and easily elastically deformed when pressed. As the form of the upright bottle container (X), from the viewpoint of operability when filling the contents and airtightness, it is preferably made into a film container, specifically, for example, a bag container.

[0026] The toothpaste composition (Y) of the present invention is filled in the upright bottle container (X), the content of the water-insoluble powder (yx) is less than 5% by mass, or the water-insoluble powder (yx) is absent, the Helipath viscosity (y1) at 25°C is from 1300 dPa·s to 3000 dPa·s, and the ratio ((y1) / (y2)) of the Helipath viscosity (y1) at 25°C to the B8H viscosity (y2) at 25°C is from 0.3 to less than 1. By using a dentifrice composition (Y) having a specific viscosity characteristic with a limited content of such water-insoluble powder, the entrainment of unnecessary bubbles due to the incorporation of air can be effectively suppressed until the dentifrice composition (Y) in the container is completely used up, and good sprayability and excellent shape retention can also be exhibited.

[0027] From the perspective of exhibiting unique viscosity characteristics when filled in the upright bottle container (X), effectively suppressing the occurrence of air bubble entrapment, maintaining good ejectability and ensuring excellent shape retention, the toothpaste composition (Y) has a Helipath viscosity (y1) at 25°C of 1300 dPa･s or higher, preferably 1350 dPa･s or higher, more preferably 1400 dPa･s or higher, further preferably 1450 dPa･s or higher, further preferably 1500 dPa･s or higher, and is 3000 dPa･s or lower, preferably 2500 dPa･s or lower, further preferably 2300 dPa･s or lower, further preferably 2000 dPa･s or lower, and further preferably 1800 dPa･s or lower. Furthermore, the Helipath viscosity (y1) of the dentifrice composition (Y) at 25°C is not less than 1300 dPa·s and not more than 3000 dPa·s, preferably 1350 to 2500 dPa·s, more preferably 1400 to 2300 dPa·s, further preferably 1450 to 2000 dPa·s, and further preferably 1500 to 1800 dPa·s.

[0028] In order to exhibit unique viscosity characteristics when filled in the upright bottle container (X), effectively suppress the occurrence of air bubble entrapment, maintain good ejectability, and ensure excellent shape retention, the toothpaste composition (Y) preferably has a B8H viscosity (y2) at 25°C of 1500 dPa·s or higher, more preferably 1800 dPa·s or higher, and even more preferably 2500 dPa·s or higher, and preferably 3500 dPa·s or lower, more preferably 3200 dPa·s or lower, and even more preferably 3000 dPa·s or lower. Furthermore, the toothpaste composition (Y) preferably has a B8H viscosity (y2) at 25°C of 1500-3500 dPa·s, more preferably 1800-3200 dPa·s, and even more preferably 2500-3000 dPa·s.

[0029] From the perspectives of ensuring good ejection properties and shape retention when filled in the upright bottle container (X), effectively suppressing the occurrence of unnecessary air bubble entrainment due to the incorporation of air until the toothpaste composition (Y) in the container is used up, and preventing unnecessary fixation of the composition in the nozzle or flow path, thereby ensuring smooth operation of the pump, the ratio ((y1) / (y2)) of the Helipath viscosity (y1) of the toothpaste composition (Y) at 25°C to the B8H viscosity (y2) at 25°C is 0.3 or more, preferably 0.4 or more, more preferably 0.5 or more, and even more preferably 0.55 or more, and is less than 1, preferably 0.95 or less, more preferably 0.9 or less, more preferably 0.8 or less, even more preferably 0.75 or less, and even more preferably 0.62 or less. Furthermore, the ratio ((y1) / (y2)) of the Helipath viscosity (y1) of the dentifrice composition (Y) at 25°C to the B8H viscosity (y2) at 25°C is 0.3 or more and less than 1, preferably 0.4 to 0.95, more preferably 0.5 to 0.9, further preferably 0.55 to 0.8, further preferably 0.55 to 0.75, and further preferably 0.55 to 0.62.

[0030] In the dentifrice of the present invention, from the perspective of effectively suppressing the occurrence of air bubble entrapment until the dentifrice composition (Y) in the container is completely used up, and from the perspective of ensuring good sprayability and shape retention, the content of the water-insoluble powder (yx) in the dentifrice composition (Y) is less than 5% by mass, or the dentifrice composition (Y) does not contain the water-insoluble powder (yx). Here, "water-insoluble" means that the amount of the substance that dissolves in 100 g of water (20°C) is 1 g or less.

[0031] Examples of the water-insoluble powder (yx) include one or more selected from silicic anhydride, silica, light calcium carbonate, heavy calcium carbonate, zeolite, calcium hydrogen phosphate, calcium phosphate, insoluble sodium metaphosphate, aluminum hydroxide, magnesium phosphate, calcium pyrophosphate, and magnesium carbonate. Examples of silicic anhydride include abrasive silica with an oil absorption of 50-150 ml / 100 g and thickening silica with an oil absorption of 200-400 ml / 100 g. The oil absorption refers to the amount of oil that silica can support and is determined by the amount of cooked linseed oil absorbed using the measurement method specified in JIS K5101-13-2 (established in 2004).

[0032] From the perspective of expressing specific viscosity characteristics and effectively suppressing the occurrence of air bubble entrapment to ensure good ejection properties or shape retention, the content of the water-insoluble powder (yx) in the toothpaste composition (Y) is less than 5% by mass, preferably 4.5% by mass or less, more preferably 4% by mass or less, further preferably 3% by mass or less, further preferably 2% by mass or less, and further preferably 0.8% by mass or less, or the toothpaste composition (Y) does not contain the water-insoluble powder (yx).

[0033] Among them, in the dentifrice composition (Y), the content of abrasive silica is preferably 4.5% by mass or less, more preferably 4% by mass or less, further preferably 3% by mass or less, and can be 1% by mass or more. Furthermore, in the dentifrice composition (Y), the content of thickening silica is preferably 2% by mass or less, more preferably 1% by mass or less, and even more preferably 0.4% by mass or less. The dentifrice composition (Y) further preferably does not contain thickening silica.

[0034] From the perspective of producing a composition exhibiting specific viscosity characteristics, the dentifrice composition (Y) preferably further contains sodium carboxymethylcellulose (yA) having an etherification degree of less than 1. The etherification degree refers to the value obtained by replacing three hydroxyl groups per cellulose unit with carboxymethyl groups (-CH2COONa), as determined by the incineration method.

[0035] From the perspective of effectively suppressing the occurrence of bubble entrainment and exhibiting unique viscosity characteristics that ensure good ejectability and shape retention, the degree of etherification of component (yA) is less than 1, preferably 0.9 or less, more preferably 0.8 or less, and preferably 0.5 or more, more preferably 0.55 or more, and even more preferably 0.6 or more.

[0036] From the perspective of expressing specific viscosity characteristics, the content of component (yA) in the dentifrice composition (Y) is preferably 2% by mass or more, more preferably 2.5% by mass or more, and even more preferably 3% by mass or more, and is preferably 5% by mass or less, more preferably 4.5% by mass or less, and even more preferably 4% by mass or less. Furthermore, the content of component (yA) in the dentifrice composition (Y) is preferably 2-5% by mass, more preferably 2.5-4.5% by mass, and even more preferably 3-4% by mass.

[0037] From the perspective of ensuring smooth fluidity of the composition in the flow path and maintaining good ejection properties, the toothpaste composition (Y) preferably further contains one or more polyols (yB) selected from glycerin, propylene glycol, and polyethylene glycol, and more preferably contains at least glycerin.

[0038] In the dentifrice composition (Y), the total content of component (yB) is preferably 10% by mass or more, more preferably 12% by mass or more, and even more preferably 15% by mass or more, and is preferably 35% by mass or less, more preferably 32% by mass or less, and even more preferably 30% by mass or less. Furthermore, in the dentifrice composition (Y), the total content of component (yB) is preferably 10-35% by mass, more preferably 12-32% by mass, and even more preferably 15-30% by mass. The content of glycerin in the dentifrice composition (Y) is preferably 5% by mass or more, more preferably 7% by mass or more, even more preferably 10% by mass or more, even more preferably 15% by mass or more, and is preferably 30% by mass or less, more preferably 25% by mass or less, and even more preferably 20% by mass or less. Furthermore, the content of glycerin in the dentifrice composition (Y) is preferably 5-30% by mass, more preferably 7-25% by mass, even more preferably 10-20% by mass, and even more preferably 15-20% by mass.

[0039] From the perspective of producing a composition exhibiting specific viscosity characteristics, the dentifrice composition (Y) preferably further contains one or more sugar alcohols (yC) selected from erythritol, mannitol, sorbitol, xylitol, maltitol, and trehalose. Among these, one or more sugar alcohols selected from erythritol, mannitol, sorbitol, and maltitol are preferred, and one or more sugar alcohols selected from erythritol, sorbitol, and maltitol are more preferred.

[0040] In the dentifrice composition (Y), the total content of component (yC) is preferably 15% by mass or more, preferably 20% by mass or more, more preferably 22% by mass or more, and even more preferably 25% by mass or more, and is preferably 45% by mass or less, more preferably 40% by mass or less, and even more preferably 35% by mass or less. Furthermore, in the dentifrice composition (Y), the total content of component (yC) is preferably 15-45% by mass, preferably 20-45% by mass, more preferably 22-40% by mass, and even more preferably 25-35% by mass.

[0041] In the dentifrice composition (Y), from the perspective of effectively suppressing the occurrence of air bubble entrapment and exhibiting unique viscosity characteristics that ensure good ejection properties and shape retention, the mass ratio of the content of component (yB) to the content of component (yC) ((yB) / (yC)) is preferably 0.4 or greater, more preferably 0.5 or greater, and even more preferably 0.6 or greater, and is preferably 1.3 or less, more preferably 1.2 or less, and even more preferably 1.1 or less. Furthermore, the mass ratio of the content of component (yB) to the content of component (yC) ((yB) / (yC)) is preferably 0.4 or greater and 1.3 or less, more preferably 0.5-1.2, and even more preferably 0.6-1.1.

[0042] From the perspective of creating a composition exhibiting specific viscosity characteristics, the dentifrice composition (Y) preferably further contains water (yD). The water component (yD) herein refers to the total water content of the dentifrice composition, including not only purified water used in the dentifrice composition but also the water contained in each of the formulated ingredients. The inclusion of water (yD) in the dentifrice composition (Y) allows the aforementioned ingredients to be well dissolved or dispersed. This dentifrice composition (Y) is filled in an upright bottle container (X) to form a dentifrice, thereby fully demonstrating the desired effect.

[0043] In the dentifrice composition (Y), the content of component (yD) is preferably 30% by mass or more, more preferably 32% by mass or more, and even more preferably 35% by mass or more, and is preferably 60% by mass or less, more preferably 57% by mass or less, and even more preferably 50% by mass or less. Furthermore, in the dentifrice composition (Y), the content of component (yD) is preferably 30-60% by mass, more preferably 32-57% by mass, and even more preferably 35-50% by mass.

[0044] Furthermore, the content of component (yD) can also be calculated based on the amount of water prepared and the amount of water in the prepared components. For example, it can be measured using a Karl Fischer moisture meter. A Karl Fischer moisture meter, for example, can be used. A trace moisture meter (manufactured by Hiranuma Sangyo Co., Ltd.) can be used. In this device, 5 g of the toothpaste composition can be suspended in 25 g of anhydrous methanol, and 0.02 g of the suspension can be aliquoted to measure the water content.

[0045] In the dentifrice composition (Y), from the perspective of effectively suppressing the occurrence of air bubble entrapment and exhibiting unique viscosity characteristics that ensure good ejectability and shape retention, the mass ratio of the total content of component (yB) and component (yC) to the content of component (yD) ({(yB) + (yC)} / (yD)) is preferably 0.5 or more, more preferably 0.7 or more, further preferably 0.75 or more, further preferably 0.8 or more, and is preferably 1.5 or less, further preferably 1.4 or less, and further preferably 1.3 or less. Furthermore, the mass ratio of the total content of component (yB) and component (yC) to the content of component (yD) ({(yB) + (yC)} / (yD)) is preferably 0.5 or more and 1.5 or less, more preferably 0.7 to 1.4, further preferably 0.75 to 1.4, and further preferably 0.8 to 1.3.

[0046] The dentifrice composition (Y) may further contain one or more surfactants selected from anionic surfactants and nonionic surfactants. Examples of the anionic surfactant include fatty acid salts such as oleate and laurate; alkyl sulfates such as lauryl sulfate, myristyl sulfate, palmityl sulfate, stearyl sulfate, octyl sulfate, and capryl sulfate; alkyl sulfonates such as alkylbenzenesulfonate, α-olefinsulfonate, and hydroxyalkanesulfonate; alkyl phosphates such as alkylphosphate; higher fatty acid sulfonated monoglyceride salts, fatty acid ester salts of isethionic acid; polyoxyethylene monoalkylphosphate; and salts of N-acylamino acids, N-acyltaurine, and the like.

[0047] Examples of the nonionic surfactant include one or more selected from the group consisting of polyoxyethylene hydrogenated castor oil; sucrose fatty acid esters; sorbitan fatty acid esters; glycerol fatty acid esters such as glyceryl monostearate; alkyl glucosides; polyglycerol fatty acid esters such as decaglyceryl monostearate and decaglyceryl monomyristate; polyoxyethylene alkylphenyl ethers such as polyoxyethylene monoalkyl (or alkenyl) ethers, polyoxyethylene polyoxypropylene copolymers, and polyoxyethylene nonylphenyl ether; fatty acid alkanolamides such as coconut oil fatty acid diethanolamide; and polyethylene glycol fatty acid esters.

[0048] The content of the surfactant in the dentifrice composition (Y) is preferably 1% by mass or more, more preferably 1.5% by mass or more, and even more preferably 2% by mass or more, and is preferably 3% by mass or less, more preferably 2.7% by mass or less, and even more preferably 2.5% by mass or less. Furthermore, the content of the surfactant in the dentifrice composition (Y) is preferably 1-3% by mass, more preferably 1.5-2.7% by mass, and even more preferably 2-2.5% by mass.

[0049] The dentifrice composition (Y) may further contain a binder and / or viscosity modifier in addition to the above-mentioned component (yA) within a range that does not hinder the effects of the present invention. Examples of such binders and / or viscosity modifiers include: polymer binders such as carboxyvinyl polymers and acrylic acid / alkyl (meth)acrylate copolymers; hydroxycellulose derivatives such as hydroxyethyl cellulose, hydroxypropyl cellulose, and hydroxypropyl methyl cellulose; and binders and / or viscosity modifiers such as carboxymethyl cellulose with a degree of etherification of 1 or greater, ethyl cellulose, sodium alginate, carrageenan, tannin gum, sodium polyacrylate, pectin, agar, tragacanth gum, gum arabic, guar gum, karaya gum, locust bean gum, gellan gum, tamarind gum, and psyllium seed gum.

[0050] In the dentifrice composition (Y), the total content of the binder and viscosity modifier other than the above-mentioned component (yA) is preferably 2% by mass or less, more preferably 1.8% by mass or less, and further preferably 1.5% by mass or less.

[0051] The dentifrice composition (Y) may further contain fluoride; medicinal ingredients such as vitamin E acetate and glycyrrhetinic acid; antibacterial agents such as cetylpyridinium chloride; flavorings; sweeteners; and coloring agents as ingredients other than the above ingredients, within a range that does not hinder the effects of the present invention.

[0052] The present invention can be further made into the following toothpaste kit for use. That is, the dentifrice set of the present invention comprises an upright bottle container (X) and a dentifrice composition (Y), wherein the upright bottle container (X) is formed by connecting an airless pump member having a nozzle to an opening on the upper surface of a container body, wherein the content of a water-insoluble powder (yx) in the dentifrice composition (Y) is less than 5% by mass, or the dentifrice composition (Y) contains no water-insoluble powder (yx), has a Helipath viscosity (y1) at 25°C of 1300 dPa·s to 3000 dPa·s, and has a ratio ((y1) / (y2)) of the Helipath viscosity (y1) at 25°C to the B8H viscosity (y2) at 25°C of 0.3 or more and less than 1. The upright bottle container (X) has the following mechanism: in conjunction with the operation of the pump, the tooth cleaning composition (Y) is sucked in from the suction port (x1-1) through the suction valve (x1-2), and the tooth cleaning composition (Y) is ejected from the nozzle outlet. The initial filling rate of the toothpaste composition (Y) in the upright bottle container (X) is less than 100%, and the suction port (x1-1) in the upright bottle container (X) is not immersed in the toothpaste composition (Y) before the use of the toothpaste set begins.

[0053] Regarding the above-mentioned embodiment, the present invention further discloses the following dentifrice and dentifrice set formed by filling a dentifrice composition into an upright bottle container. [1] A toothpaste comprising a toothpaste composition (Y) filled into a vertical bottle container (X) having an airless pump member with a nozzle connected to an opening on the upper surface of the container body at an initial filling rate less than 100%. The upright bottle container (X) has the following mechanism: in conjunction with the operation of the pump, the tooth cleaning composition (Y) is sucked in from the suction port (x1-1) through the suction valve (x1-2), and the tooth cleaning composition (Y) is ejected from the nozzle outlet. In the upright bottle container (X), the inlet (x1-1) is not immersed in the toothpaste composition (Y) before the use of the toothpaste begins. In the dentifrice composition (Y), the content of the water-insoluble powder (yx) is less than 5% by mass, or the water-insoluble powder (yx) is absent, the Helipath viscosity (y1) at 25°C is from 1300 dPa·s to 3000 dPa·s, and the ratio ((y1) / (y2)) of the Helipath viscosity (y1) at 25°C to the B8H viscosity (y2) at 25°C is from 0.3 to less than 1. [2] The toothpaste of [1] above, wherein in the upright bottle container (X), the distance (xd) from the suction port (x1-1) to the suction valve (x1-2) is preferably less than 50 mm, more preferably less than 46 mm, further preferably less than 35 mm, further preferably less than 25 mm, further preferably less than 20 mm, further preferably less than 15 mm, further preferably less than 10 mm, further preferably less than 5 mm, further preferably less than 1 mm.

[0054] [3] In the toothpaste of [1] or [2] above, when a dip tube is provided at the lower end of the airless pump member of the upright bottle container (X), the length of the dip tube, 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, further preferably less than 30 mm, further preferably less than 20 mm, and further preferably less than 18 mm. [4] A toothpaste as described in any one of [1] to [3] above, wherein the upright bottle container (X) is preferably configured such that no dipping tube is provided at the lower end of the airless pump member. [5] A toothpaste according to any one of [1] to [4] above, wherein in the upright bottle container (X), the maximum pressure (x2) of the pump is preferably 10 N or more, more preferably 20 N or more, and further preferably 30 N or more, and preferably 100 N or less, more preferably 80 N or less, and further preferably 50 N or less. [6] The toothpaste according to any one of [1] to [5] above, wherein the initial filling rate of the toothpaste composition (Y) in the upright bottle container (X) may be 50-99%, 60-95%, 65-90%, or 70-85%. [7] The toothpaste according to any one of [1] to [6] above, wherein the upright bottle container (X) is preferably a film container, more preferably a bag container.

[0055] [8] The dentifrice according to any one of [1] to [7] above, wherein the Helipath viscosity (y1) of the dentifrice composition (Y) at 25°C is preferably 1350 dPa･s or more, more preferably 1400 dPa･s or more, further preferably 1450 dPa･s or more, further preferably 1500 dPa･s or more, and preferably 2500 dPa･s or less, more preferably 2300 dPa･s or less, further preferably 2000 dPa･s or less, further preferably 1800 dPa･s or less. [9] The dentifrice according to any one of [1] to [8] above, wherein the B8H viscosity (y2) of the dentifrice composition (Y) at 25°C is preferably 1500 dPa･s or more, more preferably 1800 dPa･s or more, further preferably 2500 dPa･s or more, and preferably 3500 dPa･s or less, more preferably 3200 dPa･s or less, further preferably 3000 dPa･s or less.

[10] The dentifrice according to any one of [1] to [9] above, wherein the ratio ((y1) / (y2)) of the Helipath viscosity (y1) at 25°C of the dentifrice composition (Y) to the B8H viscosity (y2) at 25°C is preferably 0.4 or more, more preferably 0.5 or more, further preferably 0.55 or more, and preferably 0.95 or less, more preferably 0.9 or less, further preferably 0.8 or less, further more preferably 0.75 or less, further more preferably 0.62 or less.

[0056]

[11] A dentifrice according to any one of [1] to

[10] above, wherein the content of the water-insoluble powder (yx) in the dentifrice composition (Y) is less than 5% by mass, preferably less than 4.5% by mass, more preferably less than 4% by mass, further preferably less than 3% by mass, further preferably less than 2% by mass, further preferably less than 0.8% by mass, or the dentifrice composition (Y) does not contain the water-insoluble powder (yx).

[12] The toothpaste of

[11] above, wherein the water-insoluble powder (yx) is one or more selected from silicic anhydride, silica light calcium carbonate, heavy calcium carbonate, zeolite, calcium hydrogen phosphate, calcium phosphate, insoluble sodium metaphosphate, aluminum hydroxide, magnesium phosphate, calcium pyrophosphate, and magnesium carbonate, wherein the silicic anhydride may be abrasive silica having an oil absorption of 50-150 mL / 100 g, or thickening silica having an oil absorption of 200-400 mL / 100 g.

[13] A dentifrice according to any one of [1] to

[12] above, wherein the content of abrasive silica in the dentifrice composition (Y) is preferably 4.5% by mass or less, more preferably 4% by mass or less, further preferably 3% by mass or less, and may be 1% by mass or more.

[14] A dentifrice according to any one of [1] to

[13] above, wherein the content of thickening silica in the dentifrice composition (Y) is preferably 2% by mass or less, more preferably 1% by mass or less, further preferably 0.4% by mass or less, and further preferably the dentifrice composition (Y) does not contain thickening silica.

[0057]

[15] A dentifrice according to any one of [1] to

[14] above, wherein the dentifrice composition (Y) preferably further contains sodium carboxymethyl cellulose (yA) having an etherification degree of less than 1, and the etherification degree of the sodium carboxymethyl cellulose (yA) is preferably 0.9 or less, more preferably 0.8 or less, and preferably 0.5 or more, more preferably 0.55 or more, and more preferably 0.6 or more.

[16] A dentifrice as described in

[15] above, wherein the content of component (yA) in the dentifrice composition (Y) is preferably 2% by mass or more, more preferably 2.5% by mass or more, and further preferably 3% by mass or more, and preferably 5% by mass or less, more preferably 4.5% by mass or less, and further preferably 4% by mass or less.

[17] A dentifrice according to any one of [1] to

[16] above, wherein the dentifrice composition (Y) preferably further contains one or more polyols (yB) selected from glycerol, propylene glycol, and polyethylene glycol, and more preferably contains at least glycerol.

[18] A dentifrice as described in

[17] above, wherein the total content of component (yB) in the dentifrice composition (Y) is preferably 10% by mass or more, more preferably 12% by mass or more, and further preferably 15% by mass or more, and preferably 35% by mass or less, more preferably 32% by mass or less, and further preferably 30% by mass or less.

[19] A dentifrice as described in

[17] or

[18] above, wherein the content of glycerol in the dentifrice composition (Y) is preferably 5% by mass or more, more preferably 7% by mass or more, further preferably 10% by mass or more, further preferably 15% by mass or more, and preferably 30% by mass or less, more preferably 25% by mass or less, further preferably 20% by mass or less.

[0058]

[20] A dentifrice according to any one of [1] to

[19] above, wherein the dentifrice composition (Y) preferably further contains one or more sugar alcohols (yC) selected from erythritol, mannitol, sorbitol, xylitol, maltitol, and trehalose, preferably one or more sugar alcohols selected from erythritol, mannitol, sorbitol, and maltitol, and more preferably one or more sugar alcohols selected from erythritol, sorbitol, and maltitol.

[21] The dentifrice of

[20] above, wherein the total content of component (yC) in the dentifrice composition (Y) is preferably 20% by mass or more, more preferably 22% by mass or more, further preferably 25% by mass or more, and preferably 45% by mass or less, more preferably 40% by mass or less, further preferably 35% by mass or less.

[22] A dentifrice according to any one of

[17] to

[21] above, wherein in the dentifrice composition (Y), the mass ratio of the content of component (yB) to the content of component (yC) ((yB) / (yC)) is preferably 0.4 or more, more preferably 0.5 or more, further preferably 0.6 or more, and preferably 1.3 or less, more preferably 1.2 or less, further preferably 1.1 or less.

[23] A dentifrice according to any one of [1] to

[22] above, wherein the dentifrice composition (Y) preferably contains water (yD), and the content of the component (yD) is preferably 30% by mass or more, more preferably 32% by mass or more, and further preferably 35% by mass or more, and preferably 60% by mass or less, more preferably 57% by mass or less, and further preferably 50% by mass or less.

[0059]

[24] A dentifrice as described in

[23] above, wherein in the dentifrice composition (Y), the mass ratio of the total content of component (yB) and the content of component (yC) to the content of component (yD) ({(yB)+(yC)} / (yD)) is preferably 0.5 or more, more preferably 0.7 or more, further preferably 0.75 or more, further preferably 0.8 or more, and preferably 1.5 or less, more preferably 1.4 or less, further preferably 1.3 or less.

[25] A dentifrice according to any one of [1] to

[24] above, wherein the total content of the binder and viscosity modifier other than component (yA) in the dentifrice composition (Y) is preferably 2% by mass or less, more preferably 1.8% by mass or less, and even more preferably 1.5% by mass or less.

[26] A toothpaste set comprising an upright bottle container (X) and a toothpaste composition (Y), wherein the upright bottle container (X) is an airless pump member having a nozzle connected to an opening on the upper surface of the container body, the content of water-insoluble powder (yx) in the toothpaste composition (Y) is less than 5% by mass, or the water-insoluble powder (yx) is not contained, the Helipath viscosity (y1) at 25°C is not less than 1300 dPa･s and not more than 3000 dPa･s, and the ratio ((y1) / (y2)) of the Helipath viscosity (y1) at 25°C to the B8H viscosity (y2) at 25°C is not less than 0.3 and not more than 1, The upright bottle container (X) has the following mechanism: in conjunction with the operation of the pump, the tooth cleaning composition (Y) is sucked in from the suction port (x1-1) through the suction valve (x1-2), and the tooth cleaning composition (Y) is ejected from the nozzle outlet. The initial filling rate of the toothpaste composition (Y) in the upright bottle container (X) is less than 100%, and the suction port (x1-1) in the upright bottle container (X) is not immersed in the toothpaste composition (Y) before the use of the toothpaste set begins. [Example]

[0060] The present invention will be described in detail below based on the following examples. In addition, unless otherwise indicated in the tables, the content of each component in the dentifrice composition is expressed in mass %.

[0061] [Examples 1 to 4, Comparative Examples 1 to 4] In Examples 1-4 and Comparative Examples 1-2 and 4, the following container A (a container not equipped with a dip tube, as shown in FIG1 ) was used as the upright bottle container. In Comparative Example 3, container B (a container equipped with a dip tube) was used as the upright bottle container. Each dentifrice composition was prepared according to the formulation shown in Table 1 and then appropriately filled into each upright bottle container. The following measurements and evaluations were then performed. Furthermore, in container A, the inlet port was not immersed in the filled dentifrice composition in an upright state before use, while in container B, the inlet port was immersed in the filled dentifrice composition in an upright state before use. The results are shown in Table 1.

[0062] Upright bottle container Container A Distance (xd): 18 mm Inner diameter of suction port (x1-1): 9 mm Maximum pump pressure (x2): 38 N Initial fill rate: 72% Container B Distance (xd): 58 mm (immersion tube length: 40 mm) Inner diameter of suction port (x1-1): 9 mm Maximum pump pressure (x2): 38 N Initial fill rate: 72%

[0063] Maximum pump pressure Using a compression tester (M1000E, manufactured by MECMESHIN), press the center of the pump button under the following conditions. The maximum pressure (N) from the start of pressing to the complete insertion is measured as the maximum pressure of the pump. Indenter: Circular indenter with a radius of 1 cm Pressure point: the center of the pump button Compression speed: 50 mm / min

[0064] Helipath Viscosity Each of the obtained dentifrice compositions was placed in a viscosity measurement container and stored in a thermostat at 25°C for 24 hours. The viscosity was then measured using a Helipath viscometer (VISCOMETER TVB-10, manufactured by Toki Sangyo Co., Ltd.) with rotor TC at a rotation speed of 2.5 rpm for 1 minute.

[0065] B8H Viscosity Each of the obtained dentifrice compositions was placed in a viscosity measurement container and stored in a thermostat at 25°C for 24 hours. The viscosity was then measured using a B8H viscometer (TVB-10R, manufactured by Toki Sangyo Co., Ltd.) with rotor H7, a rotation speed of 2.5 rpm, and a time period of 1 minute.

[0066] Squirting Sex Each upright bottle container was filled with 100 ml of each of the toothpaste compositions listed in Table 1. An airless pump was attached, the bottle was sealed, and the container was stored at 25°C for 24 hours. The center of the pump button was fully depressed to dispense 1 g of the product. The extrudability, drooping or stringing from the nozzle, and the stability of the product over time were evaluated according to the following criteria.

[0067] ･Extrudability Evaluate the degree of hardness of the pump as felt when the center of the pump button is pressed in. 1: No hardness at all 2: I don't feel much hardness 3: Hard to say 4: Feel a little hard 5: Feeling of a degree of hardness that is concerning

[0068] ･Drooping or stringing from the nozzle The center of the pump button was pressed in to spray the toothpaste composition onto the bristles of the toothbrush. The sagging of the toothpaste composition in the spray port and the degree of stringing between the spray port and the bristles of the toothbrush were observed and evaluated. 1: There is no sagging at the nozzle, no drawing between the nozzle and the bristles of the toothbrush, and the fracture is good 2: There is no sagging at the nozzle, and there is almost no drawing between the nozzle and the bristles of the toothbrush, and the fracture is good 3: There is a slight droop at the nozzle, and a slight drawing occurs between the nozzle and the bristles of the toothbrush 4: There is drooping at the nozzle, and there is also drawing between the nozzle and the bristles of the toothbrush

[0069] ･Dispensing stability over time After fully pushing the center of the pump button in (initial spray), each upright bottle container was stored for one week. The center of the pump button was again fully pushed in, and the changes in spray properties due to the presence or absence of the toothpaste composition fixed around the spray port were evaluated. 1: There is no tooth cleaning composition fixed, and it is as easy to spray out as the first time 2: The tooth cleaning composition is slightly fixed and is easier to spray out than the first time. 3: The tooth cleaning composition is fixed, which is harder than the first time and a little difficult to spray out. 4: The tooth cleaning composition is fixed, which is harder than the first time and difficult to spray out

[0070] Bubble Entrainment Suppression Each upright bottle container was filled with 100 ml of each of the dentifrice compositions listed in Table 1. An airless pump was attached, the container was sealed, and the container was stored at 25°C for 24 hours. The dentifrice composition was then dispensed from the dispensing port until the contents were exhausted. The number of times air bubble entrainment occurred from the start to the end of the dispensing process was counted and sensory evaluation was performed. This was used as an indicator of the effectiveness of suppressing air bubble entrainment, as indicated by the following criteria. A lower value based on the following criteria indicates a more effective suppression of air bubble entrainment. 1: Bubble entrainment is not a concern at all (bubble entrainment frequency is less than 10 times) 2: Bubble entrainment is slightly concerning (bubble entrainment is more than 10 times and less than 20 times) 3: Air bubble entrainment is slightly concerning and causes discomfort (the number of air bubble entrainment is more than 20 times and less than 30 times) 4: Bubble entrainment is a concern (bubble entrainment is more than 30 times and less than 40 times) 5: Bubble entrainment is very worrying (bubble entrainment number is 40 times)

[0071] Pump Operability After filling the container bodies of upright bottles with 100 ml of each of the toothpaste compositions listed in Table 1, the airless pump assembly was installed, sealed, and stored at 25°C for 24 hours. The center of the pump button was then pressed once, and sensory evaluation was performed to determine whether the button returned to its original position. Smaller values ​​based on the following criteria indicate better flowability of the toothpaste composition within the flow path, maintaining better sprayability, and enabling efficient use of the toothpaste composition within the container without adversely affecting pump operability. 1: The button quickly returns to its original state 2: The button returns to its original state roughly and quickly 3: The button returns to its original state slightly slower 4: The button returns to its original state slowly

[0072] Conformity Each upright bottle container was filled with 115 g of each of the dentifrice compositions listed in Table 1. An airless pump was then installed, the container was sealed, and stored at 25°C for 24 hours. Approximately 2 g of the dentifrice composition was then dispensed from the bottle container's outlet onto the bristles of a toothbrush. The flowability and sagging of the dentifrice composition on the bristles were observed, and the shape retention of the dentifrice composition was evaluated according to the following criteria. Lower values ​​based on the following criteria indicate better shape retention of the dentifrice composition. 1: No flow at all 2: Almost no flow 3: Slightly flowing, but not drooping from the bristles 4: Starts to flow immediately after spraying and droops from the bristles within 30 seconds 5: Immediately after spraying, the bristles will droop up and down

[0073] [Table 1] Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Tooth cleaning composition (Y) (yA) Sodium carboxymethyl cellulose a (etherification degree 0.7) twenty three 2 1.5 0.5 2.3 Sodium carboxymethyl cellulose b (etherification degree 0.6) 3.25 3 Sodium carboxymethyl cellulose c (etherification degree 0.9) 1.1 0.5 1.5 1.5 0.7 0.8 1.1 1.8 Sodium carboxymethyl cellulose d (etherification degree 1.3) 1.9 (yB) glycerin 10 8.5 15 7 10 10 10 13 Propylene glycol 7 1.5 6 6 4 7 7 5 polyethylene glycol 6 6 6 6 (yC) Sorbitol solution (70%) 10 15 10 20 10 10 10 10 Maltitol liquid (75%) 10 12 20 27 10 10 twenty three Erythritol 10 10 8 10 10 Mannitol 2 4 1.5 (yx) Silicic anhydride a ※ 1 3 3 4 3 4.5 3 3 4.5 Silicic anhydride b ※ 2 10 Sodium laurate 1 1 1 1 1 1 1 1 Polyoxyethylene hydrogenated castor oil 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Polyoxyethylene sorbitan monostearate 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Sodium monofluorophosphate 1.15 1.15 1.15 1.15 1.15 1.15 1.15 Sodium fluoride 0.33 β-glycyrrhetinic acid 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Cetylpyridinium chloride 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 spices 1 1 1 1 1 1 1 1 Saccharin sodium 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 purified water The remainder The remainder The remainder The remainder The remainder The remainder The remainder The remainder total 100 100 100 100 100 100 100 100 (yD) Water content 47.74 44.21 39.14 51.14 37.69 39.84 47.74 37.69 Helipath viscosity (y1) (dPa･s) 1720 1352 1872 1824 480 1568 1720 4080 B8H viscosity (y2) (dPa･s) 2940 2030 2910 2210 650 2320 2940 5020 (y1) / (y2) 0.59 0.67 0.64 0.83 0.74 0.68 0.59 0.81 (yB) / (yC) 0.69 0.54 1.23 0.54 0.64 0.69 0.69 0.93 {(yB)+(yC)} / (yD) 0.87 1.03 1.25 0.68 1.25 1.04 0.87 1.28 Upright bottle container (X) Container A Container A Container A Container A Container A Container A Container B Container A Squirting Extrudability 2 2 2 2 1 2 2 5 Drooping or drawing from the nozzle 1 2 1 2 3 3 1 1 Spray stability over time 1 1 1 1 1 4 1 3 Bubble entrainment suppression 1 1 1 1 1 1 5 1 Pump operability 2 2 2 2 1 2 3 3 Conformity 2 2 3 3 4 1 2 1 ※1: SORBOSIL AC77 (abrasive silica), manufactured by INEOS Silicas, oil absorption 101 mL / 100 g ※2: SYLOPURE (thickening silica), manufactured by Fuji Silysia, oil absorption 323 mL / 100 g

[0074] 1. Toothpaste 2: Container body 3: No air pump components 21: Opening on the upper surface of the container body 31: Pump 32: Nozzle 33: Dip tube X1-1: Suction port X1-2: Suction valve Xd: distance from the suction port to the suction valve

Claims

1. A dental cleaning agent, comprising filling a dental cleaning composition (Y) to an initial filling rate of less than 100% into an upright bottle container (X) formed by connecting an airless pump component with a nozzle to an opening on the upper surface of a container body, wherein the upright bottle container (X) has the following mechanism: in conjunction with the operation of a pump, the dental cleaning composition (Y) is drawn in through a suction port (x1-1) via a suction valve (x1-2), and the dental cleaning composition (Y) is sprayed out from the nozzle outlet; in the upright bottle container (X), before the use of the dental cleaning agent begins, the suction port (x1-1) is in a state where it is not immersed in the dental cleaning composition (Y); in the dental cleaning composition (Y), the content of water-insoluble powder (yx) is less than 5% by mass, or does not contain water-insoluble powder (yx); and the Helipath viscosity (y1) at 25°C is 1300 dPa·s or more. The viscosity is below dPa·s, and the ratio of Helipath viscosity (y1) to B8H viscosity (y2) at 25°C ((y1) / (y2)) is 0.3 or higher but less than 1.

2. The dental cleaning agent as claimed in claim 1, wherein the dental cleaning composition (Y) contains sodium carboxymethyl cellulose (yA) with an etherification degree of less than 1.

3. The dental cleaning agent of claim 1 or 2, wherein the dental cleaning composition (Y) further contains one or more polyols (yB) selected from glycerin, propylene glycol and polyethylene glycol.

4. The dental cleaning agent as claimed in claim 1 or 2, wherein the dental cleaning composition (Y) further contains one or more sugar alcohols (yC) selected from erythritol, mannitol, sorbitol, xylitol, maltitol, and trehalose.

5. The dental cleaning agent as claimed in claim 2, wherein the content of component (yA) in the dental cleaning composition (Y) is more than 2% by mass and less than 5% by mass.

6. The dental cleaning agent as claimed in claim 4, wherein in the dental cleaning composition (Y), the mass ratio of the content of component (yB) to the content of component (yC) ((yB) / (yC)) is 0.4 or more and 1.3 or less.

7. The dental cleaning agent of claim 4, wherein the dental cleaning composition (Y) contains water (yD), and the mass ratio of the total content of component (yB) and component (yC) to the content of component (yD) ({(yB) + (yC)} / (yD)) is 0.5 or more and 1.5 or less.

8. For dental cleaning agents as requested in item 1 or 2, the distance (xd) from the inlet (x1-1) to the inlet valve (x1-2) is less than 50 mm.

9. A dental cleaning kit comprising an upright bottle (X) and a dental cleaning composition (Y), wherein the upright bottle (X) is formed by an airless pump component with a nozzle connected to an opening on the upper surface of the bottle body, and the dental cleaning composition (Y) contains less than 5% by mass of water-insoluble powder (yx), or does not contain water-insoluble powder (yx), has a Helipath viscosity (y1) of 1300 dPa·s to 3000 dPa·s at 25°C, and the ratio of Helipath viscosity (y1) to B8H viscosity (y2) at 25°C ((y1) / (y2)) is 0.3 or more and less than 1, wherein the upright bottle (X) has the following mechanism: in conjunction with the operation of a pump, the dental cleaning composition (Y) is drawn in through the suction port (x1-1) via the suction valve (x1-2), and the dental cleaning composition (Y) is sprayed out through the nozzle outlet. The initial filling rate of the dental cleaning composition (Y) in the upright bottle container (X) is less than 100%, and the suction port (x1-1) in the upright bottle container (X) is not impregnated with the dental cleaning composition (Y) before the use of the dental cleaning kit begins.

Images