Dentifrice

Abstract

The present invention relates to a dentifrice, which is obtained by filling a dentifrice composition into an upright bottle container using an airless pump, and which is capable of sufficiently suppressing the occurrence of bubble entrainment and ensuring good ejection properties and shape retention properties. Namely, the dentifrice of the present invention is obtained by filling a dentifrice composition (Y) at an initial filling rate of less than 100% into an upright bottle container (X), the upright bottle container (X) being formed by connecting an airless pump member provided with a nozzle to an upper surface opening of a container main body, and in the upright bottle container (X), a suction inlet (x1-1) is in a specific state. The content of the water-insoluble powder in the dentifrice composition (Y) is less than 5 mass%, and the ratio of the Helipath viscosity (y1) at 25 DEG C and the B8H viscosity (y2) at 25 DEG C of the dentifrice composition (Y), which is a specific value, 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. Background Art

[0002] The toothpaste filled in the container with a pump can be easily ejected by pressing the pump when in use. Among them, if an "airless pump" without air inflow is used as a pump, it has the advantage of being able to easily prevent the quality of the contents from deteriorating compared to an air inflow type pump.

[0003] For example, Patent Document 1 discloses a dentifrice composition of specific viscosity, which is contained in a pump-type dentifrice container including an airless pump and a tube for supplying the dentifrice composition to the airless pump, and contains a specific amount of thickening silica.

[0004] (Patent Document 1) Japanese Patent Application Publication No. 2021-8323 Summary of the invention

[0005] The present invention provides a dentifrice, wherein the dentifrice is prepared by filling a dentifrice composition (Y) into an upright bottle container (X) at an initial filling rate of less than 100%, 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,

[0006] The upright bottle container (X) has a mechanism that, in conjunction with the operation of the pump, the toothpaste composition (Y) is sucked from the suction port (x1-1) via the suction valve (x1-2), and the toothpaste composition (Y) is ejected from the ejection port of the nozzle.

[0007] In the upright bottle container (X), before starting to use the dentifrice, the suction port (x1-1) is not immersed in the dentifrice composition (Y).

[0008] 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), the Helipath viscosity (y1) of the dentifrice composition (Y) at 25°C is 1300 dPa·s to 3000 dPa·s, and the ratio of the Helipath viscosity (y1) of the dentifrice composition (Y) at 25°C to the B8H viscosity (y2) at 25°C ((y1) / (y2)) is 0.3 to less than 1.

[0009] Here, the present inventors have noticed the following new problem: If a paste such as a dentifrice having a high shape retention property is filled in an upright type airless pump container and an attempt is made to eject the dentifrice from the container, in particular, when the dentifrice is filled in the airless pump container at an initial filling rate of less than 100%, the air present in the container will be mixed into the dentifrice composition, and bubble entrainment will occur during ejection.

[0010] However, in the prior art such as the above-mentioned Patent Document 1, in terms of sufficiently suppressing bubble entrainment during its ejection and taking into account both good ejectability and shape retention on the toothbrush, the situation still needs to be improved.

[0011] The present invention relates to a dentifrice obtained by filling a dentifrice composition into an upright type bottle container using an airless pump, which can sufficiently suppress the occurrence of bubble entrainment and can ensure good ejectability and shape retention.

[0012] The present inventors have conducted intensive research on the above problems, and as a result, it has been found that by filling a dentifrice composition having specific viscosity characteristics with a limited content of water-insoluble powder into an upright type bottle container with a specific state of the suction port, a dentifrice can be obtained that can effectively suppress useless bubble entrainment and can ensure good ejectability and shape retention.

[0013] The dentifrice obtained by filling a dentifrice composition into an upright type bottle container according to the present invention (hereinafter, also referred to as "the dentifrice of the present invention") can effectively suppress the air in the container from being mixed into the dentifrice composition to generate useless bubble entrainment when ejecting the dentifrice composition. In addition, it can also prevent excessive drawing or useless sagging, showing good ejectability and shape retention, so that it can be felt comfortable and highly convenient during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic view showing one form of the upright type bottle constituting the dentifrice of the present invention.

[0015] Figure 2 It shows Figure 1 an enlarged view of the upper surface opening of the container body in

[0016] Figure 3 It is an enlarged view showing the upper surface opening of the container body in a container in which an immersion tube as one form of the upright type bottle constituting the dentifrice of the present invention is disposed at the lower end of an airless pump member. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, the present invention will be described in detail.

[0018] In addition, in the present invention, good "sprayability" means the following: when the dentifrice composition is sprayed from the upright bottle container, the pump is easy to press (extrudability), the composition in the spray outlet of the nozzle is suppressed from sagging or forming filaments between the spray outlet and the spraying destination, and useless adhesion of the composition to the spray outlet or flow path of the nozzle is prevented, thereby maintaining smooth spraying (spray stability over time).

[0019] In addition, "entrained air bubbles" means a state in which air is mixed into the dentifrice composition sprayed from the upright bottle container and is entrained in the dentifrice composition in the form of bubbles, which impairs the usability.

[0020] Furthermore, the state where the suction port (x1-1) is not immersed in the dentifrice composition (Y) means that in the container body of the upright bottle container, the suction port (x1-1) is not in contact with the dentifrice composition (Y) but is separated from the dentifrice composition (Y).

[0021] The dentifrice of the present invention is formed by filling the upright bottle container (X) with the dentifrice composition (Y) at an initial filling rate of less than 100%. The upright bottle container (X) is formed by connecting an airless pump member having a nozzle to the upper surface opening of the container body.

[0022] The upright bottle container (X) constituting the present invention is a container formed by a container body having a bottom surface and an upper surface opening, and connecting an airless pump member having a nozzle to the upper surface opening of the container body. That is, as Figure 1 shown in the schematic diagram, a flow path reaching the spray outlet of the nozzle 32 is formed in the upright bottle container (X) 1 constituting the present invention via the upper surface opening 21 of the container body 2 and the airless pump member 3.

[0023] Therefore, during use, if the airless pump is operated while the container 1 is kept upright, the dentifrice composition can be easily sprayed from the nozzle 32, which is a container that helps improve usability and convenience.

[0024] In addition, the airless pump member 3 is a member having a pump without air inflow. The pressure inside the pump changes in conjunction with the pressing of the pump. As a series of operations, the dentifrice composition filled in the container body 2 can be sucked into the airless pump member 3 and sprayed to the outside from the nozzle 32.

[0025] In addition, Figure 1 the airless pump member 3 shown is a member having a pump 31 presenting a so-called "dome-shaped pump" form. However, in the present invention, it is not limited to this, and it can also be a member having a pump presenting a form such as a piston pressing the upper part downward (not shown), etc., and can be appropriately selected.

[0026] Thus, the upright bottle container (X) 1 has a mechanism that, in conjunction with the operation of the pump 31, the toothpaste composition is sucked from the suction port (x1-1) via the suction valve (x1-2), and the toothpaste composition is ejected from the ejection port of the nozzle 32. Figure 1 In the embodiment of the upright bottle container (X) 1 shown in FIG. 1 , when the pump 31 is operated by pressing a button or the like, the internal pressure of the pump 31 changes, and the suction valve (x1-2) can be actuated. Specifically, if the internal pressure in the pump increases due to the operation of the pump 31, the suction valve (x1-2) is closed to prevent the inflow of the toothpaste composition. On the other hand, if the internal pressure in the pump decreases, the suction valve (x1-2) is opened to suck the toothpaste composition from the suction port (x1-1).

[0027] In the upright bottle container (X) constituting the present invention, before the use of the dentifrice composition begins, the suction port (x1-1) is not immersed in the dentifrice composition (Y).

[0028] In addition, when the immersion pipe is arranged at the lower end of the airless pump member, the suction port (x1-1) is set as the lower end of the immersion pipe.

[0029] In the conventional bottle container, a dip tube is provided, which is long enough to have its lower end reach the bottom surface of the container body. This is provided to fully suck out the contents slightly remaining near the bottom surface from the first use of the pump to the end without wasting them out.

[0030] However, in the present invention, in which an "airless pump" without air inflow is used as a pump, the initial filling rate is less than 100%, and there is an unfilled area of ​​the toothpaste composition (Y) in 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 will be kept immersed in the toothpaste composition in the container. Therefore, as the remaining amount of the toothpaste composition decreases, the air present in the unfilled area of ​​the toothpaste composition will also be sucked in together with the toothpaste composition in conjunction with the operation of the pump. As a result, air is mixed into the toothpaste composition ejected from the nozzle, which becomes the main cause of useless and uncomfortable air bubble entrainment, and the inventors have re-attention to this problem.

[0031] Thus, the present inventors have found that, first, in the upright bottle container (X) constituting the present invention, in order to effectively suppress the entrainment of useless bubbles in the ejected dentifrice composition, before starting to use the dentifrice, the suction port (x1-1) should be in a state of not being immersed in the dentifrice composition (Y), and the dentifrice composition (Y) having a specific viscosity characteristic with the content of the following water-insoluble powder being limited is filled therein. As a result, according to the present invention, when starting to use the dentifrice, first, the air occupying the unfilled area of the dentifrice composition in the container body can be pre-exhausted by multiple pump operations. Further, thereafter, not only can the occurrence of bubble entrainment be effectively suppressed until the dentifrice composition (Y) in the container is used up, but also good ejection properties and shape retention properties can be exhibited.

[0032] In order to make the suction port (x1-1) in a state of not being immersed in the dentifrice composition (Y) before starting to use the dentifrice, from the viewpoint 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 more preferably less than 25 mm, further more preferably less than 20 mm, further more preferably less than 15 mm, further more preferably less than 10 mm, further more preferably less than 5 mm, further more preferably less than 1 mm.

[0033] In addition, from the viewpoint of ensuring the fluidity of the dentifrice 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.

[0034] In one embodiment of the upright bottle container (X), from the viewpoint of making the suction port (x1-1) in a state of not being immersed in the dentifrice composition (Y) before starting to use the dentifrice, and further from the viewpoint of limiting the distance (xd) from the suction port (x1-1) to the suction valve (x1-2) within the above range, as Figure 3 shown, it is preferable to form the suction port (x1-1) by the lower end portion of the dipping tube 33 disposed at the lower end portion of the airless pump member 3.

[0035] Alternatively, in another embodiment of the upright bottle container (X), as Figure 2 shown, in the case where the dipping tube 33 is not provided, the suction port (x1-1) is integrally formed at the lower end portion of the airless pump member 3.

[0036] Therefore, 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 it is possible to discharge the air occupying the unfilled area of the dentifrice composition in the container body at the start of the first use, and it is possible to effectively suppress the entrainment of useless bubbles during ejection.

[0037] When the impregnation tube 33 is disposed 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 impregnation tube 33, measured as the distance from the suction valve (x1-2) to the lower end of the impregnation tube 33, is preferably less than 43 mm, more preferably less than 35 mm, further preferably less than 30 mm, further more preferably less than 20 mm, and further more preferably less than 18 mm.

[0038] Even more preferably, the upright bottle container (X) has a structure in which the impregnation tube is not disposed at the lower end of the airless pump member 3.

[0039] From the viewpoint of ensuring smooth fluidity of the composition in the flow path and maintaining good ejectability, 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 more preferably 4 to 12 mm, and further more preferably 5 to 11 mm.

[0040] In the upright bottle container (X), from the viewpoints of maintaining good ejectability and improving usability, the maximum pressure (x2) of the pump is preferably 10 N or more, more preferably 20 N or more, 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.

[0041] 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%, may be 60 to 95%, may be 65 to 90%, or may be 70 to 85%.

[0042] In addition, the initial filling rate (%) is 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 refers to the volume ratio (%) of the dentifrice composition (Y) when the internal volume of the container body of the upright bottle container (X) is set to 100%.

[0043] In addition, in particular, when the shape of the upright bottle container (X) is a film container such as a bag container, as Figure 1As shown, when the airless pump member 3 equipped with a nozzle is installed on the upper surface opening 21 of the container body for use, the internal volume of the container body of the upright bottle container (X) as the reference of the initial filling rate (%) refers to the volume of the total void area in the container body shielded by the installed airless pump member 3 and the suction valve (x1-2).

[0044] In the container body, the initial air presence rate (%) in the upright bottle container (X) can be more than 1% and less than 50%, can be more than 5% and less than 40%, can be more than 10% and less than 45%, or can be more than 15% and less than 30%.

[0045] In addition, the initial air presence rate (%) is a value representing 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 refers to the volume ratio (%) of the total amount of air when the internal volume of the upright bottle container (X) is set to 100%.

[0046] In addition, in particular, when the form of the upright bottle container (X) is a film container such as a bag container, as Figure 1 shown, when the airless pump member 3 equipped with a nozzle is installed on the upper surface opening 21 of the container body for use, the internal volume of the container body of the upright bottle container (X) as the reference of the initial presence rate (%) refers to the volume of the total void area in the container body shielded by the airless pump member 3 and the suction valve (x1-2).

[0047] The internal volume of the container body of the upright bottle container (X) can be appropriately designed considering usability. For example, it is preferably 30 to 1000 mL, more preferably 50 to 500 mL, further preferably 75 to 300 mL, further more preferably 80 to 250 mL, and further more preferably 90 to 200 mL.

[0048] In the upright bottle container (X), from the viewpoint of ensuring good usability, the amount (x3) of the dentifrice 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 more preferably 0.8 g or more, and preferably 10 g or less, more preferably 7 g or less, further preferably 5 g or less, and further more preferably 4 g or less.

[0049] The material of the upright bottle container (X) is preferably a material having a degree of softness that deforms according to the amount of the dentifrice composition (Y) consumed. For example, examples include polyethylene, polypropylene, polyethylene terephthalate, etc. Among them, as Figure 1The material of the button of the pump 31 of the airless pump member 3 shown can also be a material with relatively high softness and easy elastic deformation in conjunction with pressing.

[0050] As the form of the upright bottle container (X), from the viewpoints of operability and airtightness when filling the content, etc., a film container is preferred, and specifically, for example, a bag container is preferred.

[0051] Regarding the tooth cleaning composition (Y) constituting the present invention, it is filled in the above-mentioned upright bottle container (X), the content of the water-insoluble powder (yx) is less than 5% by mass, or does not contain the water-insoluble powder (yx), the Helipath viscosity (y1) at 25 °C is 1300 dPa·s or more and 3000 dPa·s or less, and the ratio ((y1) / (y2)) of the Helipath viscosity (y1) at 25 °C to the B8H viscosity (y2) at 25 °C is 0.3 or more and less than 1.

[0052] With this tooth cleaning composition (Y) having a specific viscosity characteristic with the content of the water-insoluble powder limited, until the tooth cleaning composition (Y) in the container is used up, it is possible to effectively suppress the entrainment of useless bubbles due to the mixing of air, and it can also exhibit good ejectability and excellent shape retention.

[0053] From the viewpoints of being filled in the above-mentioned upright bottle container (X), showing specific viscosity characteristics, effectively suppressing the occurrence of bubble entrainment, maintaining good ejectability, and ensuring excellent shape retention, the Helipath viscosity (y1) of the tooth cleaning composition (Y) at 25 °C is 1300 dPa·s or more, preferably 1350 dPa·s or more, more preferably 1400 dPa·s or more, further preferably 1450 dPa·s or more, further more preferably 1500 dPa·s or more, and 3000 dPa·s or less, 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. Moreover, the Helipath viscosity (y1) of the tooth cleaning composition (Y) at 25 °C is 1300 dPa·s or more and 3000 dPa·s or less, preferably 1350 - 2500 dPa·s, more preferably 1400 - 2300 dPa·s, further preferably 1450 - 2000 dPa·s, further more preferably 1500 - 1800 dPa·s.

[0054] From the viewpoint of exhibiting specific viscosity characteristics and effectively suppressing the occurrence of air entrainment while maintaining good ejectability and ensuring excellent shape retention when filled in the above-mentioned upright bottle container (X), 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. Moreover, the B8H viscosity (y2) of the dentifrice composition (Y) at 25°C is preferably 1500 to 3500 dPa·s, more preferably 1800 to 3200 dPa·s, further preferably 2500 to 3000 dPa·s.

[0055] From the viewpoints of filling in the above-mentioned upright bottle container (X) and exhibiting specific viscosity characteristics, effectively suppressing the occurrence of useless air entrainment until the dentifrice composition (Y) in the container is used up, ensuring good ejectability and shape retention, and preventing useless adhesion of the composition to the ejection port or flow path of the nozzle, etc., thereby ensuring smooth operation of the pump, etc., 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, preferably 0.4 or more, more preferably 0.5 or more, further preferably 0.55 or more, and less than 1, 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] Moreover, 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 more preferably 0.55 to 0.75, further more preferably 0.55 to 0.62.

[0057] In the dentifrice of the present invention, from the viewpoints of effectively suppressing the occurrence of air entrainment until the dentifrice composition (Y) in the container is used up and ensuring good ejectability 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).

[0058] Here, "water-insoluble" means that the dissolution amount (20°C) relative to 100 g of water is 1 g or less.

[0059] As the water-insoluble powder (yx), one or more selected from silica 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 can be cited. Among them, as silica anhydride, abrasive silica with an oil absorption of 50 to 150 ml / 100 g and thickening silica with an oil absorption of 200 to 400 ml / 100 g can be exemplified. In addition, the oil absorption represents the amount of oil that silica can carry, and is a value determined by the amount of boiled linseed oil absorbed by the measurement method of JIS K5101-13-2 (established in 2004).

[0060] From the viewpoint of exhibiting specific viscosity characteristics, effectively suppressing the occurrence of air entrainment, and ensuring good ejection properties and shape retention, in the dental care composition (Y), the content of the water-insoluble powder (yx) 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 more preferably 2% by mass or less, further more preferably 0.8% by mass or less, or the dental care composition (Y) does not contain the water-insoluble powder (yx).

[0061] Among them, in the dental care 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.

[0062] In addition, in the dental care composition (Y), the content of thickening silica is preferably 2% by mass or less, more preferably 1% by mass or less, further preferably 0.4% by mass or less, and the dental care composition (Y) is further more preferably free of thickening silica.

[0063] From the viewpoint of making a composition exhibit specific viscosity characteristics, the dental care composition (Y) preferably further contains sodium carboxymethyl cellulose (yA) with an etherification degree of less than 1. Here, the etherification degree refers to the degree to which three hydroxyl groups per unit of cellulose are substituted with carboxymethyl (-CH 2 COONa), and is a value determined by the incineration method.

[0064] From the viewpoint of effectively suppressing the occurrence of air entrainment and exhibiting specific viscosity characteristics that can ensure good ejection properties and shape retention, the etherification degree of the 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, further preferably 0.6 or more.

[0065] From the viewpoint of exhibiting specific viscosity characteristics, in the dental care composition (Y), the content of the component (yA) is preferably 2% by mass or more, more preferably 2.5% by mass or more, still more preferably 3% by mass or more, and is preferably 5% by mass or less, more preferably 4.5% by mass or less, still more preferably 4% by mass or less. Moreover, in the dental care composition (Y), the content of the component (yA) is preferably 2 to 5% by mass, more preferably 2.5 to 4.5% by mass, still more preferably 3 to 4% by mass.

[0066] From the viewpoint of ensuring smooth fluidity of the composition in the flow path and maintaining good ejectability, the dental care composition (Y) preferably further contains one or more polyhydric alcohols (yB) selected from glycerol, propylene glycol, and polyethylene glycol, and more preferably contains at least glycerol.

[0067] In the dental care composition (Y), the content of the component (yB) in total is preferably 10% by mass or more, more preferably 12% by mass or more, still more preferably 15% by mass or more, and is preferably 35% by mass or less, more preferably 32% by mass or less, still more preferably 30% by mass or less. Moreover, in the dental care composition (Y), the content of the component (yB) in total is preferably 10 to 35% by mass, more preferably 12 to 32% by mass, still more preferably 15 to 30% by mass.

[0068] Among them, in the dental care composition (Y), the content of glycerol is preferably 5% by mass or more, more preferably 7% by mass or more, still 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, still more preferably 20% by mass or less. Moreover, in the dental care composition (Y), the content of glycerol is preferably 5 to 30% by mass, more preferably 7 to 25% by mass, still more preferably 10 to 20% by mass, even more preferably 15 to 20% by mass.

[0069] From the viewpoint of making a composition exhibiting specific viscosity characteristics, the dental care composition (Y) preferably further contains one or more sugar alcohols (yC) selected from erythritol, mannitol, sorbitol, xylitol, maltitol, and trehalose. Among them, it is preferably one or more selected from erythritol, mannitol, sorbitol, and maltitol, and more preferably one or more selected from erythritol, sorbitol, and maltitol.

[0070] In the tooth cleaning composition (Y), the content of the component (yC) is preferably 15% by mass or more, more preferably 20% by mass or more, still more preferably 22% by mass or more, further preferably 25% by mass or more, and is preferably 45% by mass or less, more preferably 40% by mass or less, still more preferably 35% by mass or less. Moreover, in the tooth cleaning composition (Y), the content of the component (yC) is preferably 15 to 45% by mass, more preferably 20 to 45% by mass, still more preferably 22 to 40% by mass, further preferably 25 to 35% by mass.

[0071] In the tooth cleaning composition (Y), from the viewpoint of effectively suppressing the occurrence of air bubble entrainment and exhibiting specific viscosity characteristics capable of ensuring good ejection properties and shape retention properties, the mass ratio ((yB) / (yC)) of the content of the component (yB) to the content of the component (yC) is preferably 0.4 or more, more preferably 0.5 or more, still more preferably 0.6 or more, and is preferably 1.3 or less, more preferably 1.2 or less, still more preferably 1.1 or less. Moreover, the mass ratio ((yB) / (yC)) of the content of the component (yB) to the content of the component (yC) is preferably 0.4 or more and 1.3 or less, more preferably 0.5 to 1.2, still more preferably 0.6 to 1.1.

[0072] From the viewpoint of preparing a composition exhibiting specific viscosity characteristics, the tooth cleaning composition (Y) preferably further contains water (yD). The water of the component (yD) in the present invention refers to the total moisture contained in the tooth cleaning composition, which includes not only purified water and the like formulated in the tooth cleaning composition, but also the moisture contained in each of the formulated components. By containing water (yD) in the tooth cleaning composition (Y), the above-mentioned components can be well dissolved or dispersed, and the tooth cleaning composition (Y) is filled in a vertical bottle container (X) to form a tooth cleaning agent, thereby fully exerting the required effects.

[0073] In the tooth cleaning composition (Y), the content of the component (yD) is preferably 30% by mass or more, more preferably 32% by mass or more, still more preferably 35% by mass or more, and is preferably 60% by mass or less, more preferably 57% by mass or less, still more preferably 50% by mass or less. Moreover, in the tooth cleaning composition (Y), the content of the component (yD) is preferably 30 to 60% by mass, more preferably 32 to 57% by mass, still more preferably 35 to 50% by mass.

[0074] In addition, the content of the component (yD) can also be calculated based on the amount of water formulated and the amount of water in the formulated components, for example, by using a Karl Fischer moisture meter. As the Karl Fischer moisture meter, for example, a trace moisture measuring device (manufactured by Hiranuma Sangyo Co., Ltd.) can be used. In this device, 5 g of the toothpaste composition is suspended in 25 g of anhydrous methanol, and 0.02 g of this suspension is taken to measure the moisture content.

[0075] From the viewpoint of effectively suppressing the occurrence of air bubble entrainment and exhibiting specific viscosity characteristics that can ensure good ejectability and shape retention, in the toothpaste composition (Y), the mass ratio of the total content of the component (yB) and the component (yC) to the content of the component (yD) ({(yB)+(yC)} / (yD)) is preferably 0.5 or more, more preferably 0.7 or more, further preferably 0.75 or more, still further preferably 0.8 or more, and preferably 1.5 or less, more preferably 1.4 or less, further preferably 1.3 or less. Moreover, the mass ratio of the total content of the component (yB) and the component (yC) to the content of the 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, still further preferably 0.8 to 1.3.

[0076] The toothpaste composition (Y) may further contain one or more surfactants selected from anionic surfactants and nonionic surfactants.

[0077] Examples of the anionic surfactant include one or more selected from the following compounds: fatty acid salts such as oleate and laurate; alkyl sulfates such as lauryl sulfate, myristyl sulfate, palmyl sulfate, stearyl sulfate, octyl sulfate, and capryl sulfate; alkyl sulfonates such as alkylbenzene sulfonate, α-olefin sulfonate, and hydroxyalkane sulfonate; alkyl phosphates such as alkyl phosphate; sulfated monoglyceride salts of higher fatty acids and fatty acid ester salts of hydroxyethanesulfonic acid; polyoxyethylene monoalkyl phosphate; N-acyl amino acids, N-acyl taurine, and their salts.

[0078] As the nonionic surfactant, one or more selected from the following compounds can be cited: polyoxyethylene hydrogenated castor oil; sucrose fatty acid ester; sorbitan fatty acid ester; glycerol fatty acid esters such as glycerol monostearate; alkyl glucoside; polyglycerol fatty acid esters such as decaglycerol monostearate and decaglycerol monomyristate; polyoxyethylene monoalkyl (or alkenyl) ether, polyoxyethylene-polyoxypropylene copolymer, polyoxyethylene alkyl phenyl ether such as polyoxyethylene nonyl phenyl ether; fatty acid alkanolamide such as coconut oil fatty acid diethanolamide; and polyethylene glycol fatty acid ester.

[0079] In the tooth cleaning composition (Y), the content of the surfactant is preferably 1% by mass or more, more preferably 1.5% by mass or more, further preferably 2% by mass or more, and preferably 3% by mass or less, more preferably 2.7% by mass or less, further preferably 2.5% by mass or less. Moreover, in the tooth cleaning composition (Y), the content of the surfactant is preferably 1 to 3% by mass, more preferably 1.5 to 2.7% by mass, further preferably 2 to 2.5% by mass.

[0080] Within the range not hindering the effects of the present invention, the tooth cleaning composition (Y) may further contain a binder and / or a viscosity modifier other than the above component (yA). As the binder and / or the viscosity modifier, the following binders and / or viscosity modifiers can be cited: polymer binders such as carboxyvinyl polymer and acrylic acid / (meth)acrylic acid alkyl ester copolymer; hydroxycellulose derivatives such as hydroxyethyl cellulose, hydroxypropyl cellulose, and hydroxypropyl methyl cellulose; carboxymethyl cellulose with an etherification degree of 1 or more, ethyl cellulose, sodium alginate, carrageenan, xanthan gum, sodium polyacrylate, pectin, agar, tragacanth gum, gum arabic, guar gum, sterculia gum, locust bean gum, gellan gum, tamarind gum, and plantain seed gum.

[0081] In the tooth cleaning composition (Y), the total content of the binder and the viscosity modifier other than the above component (yA) is preferably 2% by mass or less, more preferably 1.8% by mass or less, further preferably 1.5% by mass or less.

[0082] Within the range not hindering the effects of the present invention, the tooth cleaning composition (Y) may further contain the following components as components other than the above components: fluoride; pharmaceutical components such as vitamin E acetate and glycyrrhetinic acid; antibacterial agents such as cetylpyridinium chloride; fragrances; sweeteners; colorants, etc.

[0083] The present invention can be further made into the following tooth cleaning agent kit for use.

[0084] That is, the dentifrice kit 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 upper surface opening of a container body, 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), the Helipath viscosity (y1) of the dentifrice composition (Y) at 25°C is 1300 dPa·s or more and 3000 dPa·s or less, and the ratio ((y1) / (y2)) of the Helipath viscosity (y1) at 25°C to the B8H viscosity (y2) at 25°C of the dentifrice composition (Y) is 0.3 or more and less than 1,

[0085] The upright bottle container (X) has a mechanism that, in conjunction with the operation of the pump, the toothpaste composition (Y) is sucked from the suction port (x1-1) via the suction valve (x1-2), and the toothpaste composition (Y) is ejected from the ejection port of the nozzle.

[0086] The initial filling rate of the toothpaste composition (Y) in the upright bottle container (X) is less than 100%, and, in the upright bottle container (X), before starting to use the toothpaste kit, the suction port (x1-1) is not immersed in the toothpaste composition (Y).

[0087] Regarding the above-mentioned embodiment, the present invention further discloses a dentifrice in which a vertical bottle container is filled with a dentifrice composition, and a dentifrice set as described below.

[0088] [1] A dentifrice comprising a dentifrice composition (Y) filled into an upright bottle container (X) at an initial filling rate of less than 100%, wherein the upright bottle container (X) comprises an airless pump member having a nozzle connected to an opening on the upper surface of the container body,

[0089] The upright bottle container (X) has a mechanism that, in conjunction with the operation of the pump, the toothpaste composition (Y) is sucked from the suction port (x1-1) via the suction valve (x1-2), and the toothpaste composition (Y) is ejected from the ejection port of the nozzle.

[0090] In the upright bottle container (X), before starting to use the dentifrice, the inlet (x1-1) is not immersed in the dentifrice composition (Y).

[0091] The content of the water-insoluble powder (yx) in the tooth cleaning composition (Y) is less than 5% by mass, or the tooth cleaning composition (Y) does not contain the water-insoluble powder (yx). The Helipath viscosity (y1) of the tooth cleaning composition (Y) at 25°C is 1300 dPa·s or more and 3000 dPa·s or less, and the ratio ((y1) / (y2)) of the Helipath viscosity (y1) of the tooth cleaning composition (Y) at 25°C to the B8H viscosity (y2) at 25°C is 0.3 or more and less than 1.

[0092] [2] The dentifrice according to [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 more preferably less than 25 mm, further more preferably less than 20 mm, further more preferably less than 15 mm, further more preferably less than 10 mm, further more preferably less than 5 mm, further more preferably less than 1 mm.

[0093] [3] The dentifrice according to [1] or [2] above, wherein, when an impregnation tube is disposed at the lower end of the airless pump member of the upright bottle container (X), the length of the impregnation tube, measured as the distance from the suction valve (x1-2) to the lower end of the impregnation tube, is preferably less than 43 mm, more preferably less than 35 mm, further preferably less than 30 mm, further more preferably less than 20 mm, further more preferably less than 18 mm.

[0094] [4] The dentifrice according to any one of [1] to [3] above, wherein the upright bottle container (X) is further more preferably structured such that no impregnation tube is disposed at the lower end of the airless pump member.

[0095] [5] The dentifrice 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, further preferably 30 N or more, and preferably 100 N or less, more preferably 80 N or less, further preferably 50 N or less.

[0096] [6] The dentifrice according to any one of [1] to [5] above, wherein the initial filling rate of the tooth cleaning composition (Y) in the upright bottle container (X) can be 50 to 99%, can also be 60 to 95%, can also be 65 to 90%, or can also be 70 to 85%.

[0097] [7] The dentifrice according to any one of [1] to [6] above, wherein the shape of the upright bottle container (X) is preferably a film container, more preferably a bag container.

[0098] [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, still further preferably 1500 dPa·s or more, and is preferably 2500 dPa·s or less, more preferably 2300 dPa·s or less, further preferably 2000 dPa·s or less, still further preferably 1800 dPa·s or less.

[0099] [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 is preferably 3500 dPa·s or less, more preferably 3200 dPa·s or less, further preferably 3000 dPa·s or less.

[0100]

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

[0101]

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

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

[0102]

[12] The dentifrice according to

[11] above, wherein the water-insoluble powder (yx) is one or more selected from silicon 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. Among them, as the silicon anhydride, abrasive silica with an oil absorption of 50 to 150 mL / 100 g and thickening silica with an oil absorption of 200 to 400 mL / 100 g can be mentioned.

[0103]

[13] The 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, still more preferably 3% by mass or less, and may be 1% by mass or more.

[0104]

[14] The 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, still more preferably 0.4% by mass or less, and even more preferably the dentifrice composition (Y) does not contain thickening silica.

[0105]

[15] The 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, still more preferably 0.6 or more.

[0106]

[16] The dentifrice according to

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

[0107]

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

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

[0108]

[18] The dentifrice according to

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

[0109]

[19] The dentifrice according to

[17] or

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

[0110]

[20] The 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 selected from erythritol, mannitol, sorbitol, and maltitol, more preferably one or more selected from erythritol, sorbitol, and maltitol.

[0111]

[21] The dentifrice according to

[20] above, wherein in the dentifrice composition (Y), the content of the component (yC) 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.

[0112]

[22] The dentifrice according to any one of

[17] to

[21] above, wherein in the dentifrice composition (Y), the mass ratio ((yB) / (yC)) of the content of the component (yB) to the content of the component (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.

[0113]

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

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

[0114]

[24] The dentifrice according to

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

[0115]

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

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

[0116]

[26] A dentifrice kit comprising 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 upper surface opening 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) does not contain a water-insoluble powder (yx), and the Helipath viscosity (y1) of the dentifrice composition (Y) 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 of the dentifrice composition (Y) is from 0.3 to less than 1,

[0117] The upright bottle container (X) has a mechanism that, in conjunction with the operation of the pump, the toothpaste composition (Y) is sucked from the suction port (x1-1) via the suction valve (x1-2), and the toothpaste composition (Y) is ejected from the ejection port of the nozzle.

[0118] The initial filling rate of the toothpaste composition (Y) in the upright bottle container (X) is less than 100%, and, in the upright bottle container (X), before starting to use the toothpaste kit, the suction port (x1-1) is not immersed in the toothpaste composition (Y).

[0119] [Example]

[0120] Hereinafter, the present invention will be specifically described based on Examples. In addition, unless otherwise indicated in the tables, the content of each component in the dentifrice composition is expressed in mass %.

[0121] [Examples 1 to 4, Comparative Examples 1 to 4]

[0122] Examples 1 to 4 and Comparative Examples 1 to 2 and 4 used the following container A (as Figure 1 In the embodiment shown in the figure, container B (container provided with a dipping tube) was used as the upright bottle container, and in Comparative Example 3, container B (container provided with a dipping tube) was used as the upright bottle container.

[0123] Each dentifrice composition was prepared according to the formulation shown in Table 1, and the obtained dentifrice composition was appropriately filled into each upright bottle container. Then, various measurements and evaluations were performed according to the following methods.

[0124] In addition, regarding container A, before starting use, its suction port is not immersed in the filled dentifrice composition in an upright state; regarding container B, before starting use, its suction port is immersed in the filled dentifrice composition in an upright state.

[0125] Table 1 shows the results.

[0126] <Vertical bottle container>

[0127] · Container A

[0128] Distance (xd): 18 mm

[0129] Inner diameter of the suction port (x1 - 1): 9 mm

[0130] Maximum pressure of the pump (x2): 38 N

[0131] Initial filling rate: 72%

[0132] · Container B

[0133] Distance (xd): 58 mm (Immersion tube length: 40 mm)

[0134] Inner diameter of the suction port (x1 - 1): 9 mm

[0135] Maximum pressure of the pump (x2): 38 N

[0136] Initial filling rate: 72%

[0137] <Maximum pressure of the pump>

[0138] Using a compression testing machine (M1000E, manufactured by MECMESHIN Co., Ltd.), press the center part of the pump button under the following conditions, and thereby measure the maximum pressure (N) during the period from the start of pressing to complete pressing as the maximum pressure of the pump.

[0139] Indenter: Circular indenter with a radius of 1 cm

[0140] Pressing point: Center part of the pump button

[0141] Compression speed: 50 mm / minute

[0142] <Helipath viscosity>

[0143] Put each obtained dental cleaning composition into a viscosity measurement container, store it in a thermostat at 25°C for 24 hours, and then measure it using a Helipath viscometer (VISCOMETER TVB - 10, manufactured by Toki Sangyo Co., Ltd.) under the conditions of rotor T - C, rotation speed 2.5 rpm, and 1 minute.

[0144] <B8H viscosity>

[0145] Put each obtained dental cleaning composition into a viscosity measurement container, store it in a thermostat at 25°C for 24 hours, and then measure it using a B8H viscometer (TVB - 10R, manufactured by Toki Sangyo Co., Ltd.) under the conditions of rotor H7, rotation speed 2.5 rpm, and 1 minute.

[0146] <Ejectability>

[0147] After filling 100 ml of each toothpaste composition shown in Table 1 into the container body of each upright bottle container, an airless pump member was installed and sealed, and it was stored at 25°C for 24 hours. Then, the center part of the pump button was fully pressed in to eject 1 g, and the extrudability, sagging or stringing from the ejection port, and ejection stability over time were evaluated according to the following content and criteria for each.

[0148] ·Extrudability

[0149] The degree of hardness of the pump felt when pressing the center part of the pump button was evaluated.

[0150] 1: Hardness was not felt at all.

[0151] 2: Hardness was hardly felt.

[0152] 3: It's hard to say.

[0153] 4: Slight hardness was felt.

[0154] 5: Hardness at a noticeable level was felt.

[0155] ·Sagging or stringing from the ejection port

[0156] The center part of the pump button was pressed in, and the toothpaste composition was ejected onto the bristles of the toothbrush. The sagging of the toothpaste composition in the ejection port or the degree of stringing between the ejection port and the bristles of the toothbrush was observed and evaluated.

[0157] 1: There was no sagging at the ejection port, no stringing between the ejection port and the bristles of the toothbrush, and it broke well.

[0158] 2: There was no sagging at the ejection port, almost no stringing between the ejection port and the bristles of the toothbrush, and it broke well.

[0159] 3: Slight sagging occurred at the ejection port, and slight stringing occurred between the ejection port and the bristles of the toothbrush.

[0160] 4: Sagging occurred at the ejection port, and stringing also occurred between the ejection port and the bristles of the toothbrush.

[0161] ·Ejection stability over time

[0162] After the center part of the pump button was fully pressed in (first ejection), each upright bottle container was further stored for one week, and then the center part of the pump button was fully pressed in again. The change in ejectability due to the attachment of the toothpaste composition around the ejection port was evaluated.

[0163] 1: There was no attachment of the toothpaste composition, and it was ejected easily as in the first ejection.

[0164] 2: Slightly attached with the toothpaste composition, slightly harder than the first time, but easy to spray out.

[0165] 3: Attached with the toothpaste composition, harder than the first time, slightly difficult to spray out.

[0166] 4: Attached with the toothpaste composition, harder than the first time, difficult to spray out.

[0167] <Bubble entrainment inhibition>

[0168] After filling 100 ml of each toothpaste composition shown in Table 1 into the container body of each upright bottle container, install an airless pump member and seal it, and store it at 25 °C for 24 hours. Then, spray out the toothpaste composition from the spray outlet until the toothpaste composition in the container is completely sprayed out. While counting the number of times of bubble entrainment during the period from the start to the end of spraying, conduct a sensory evaluation. According to the following criteria, it is used as an index for evaluating the bubble entrainment inhibition effect. The smaller the value based on the following criteria, the more effectively the bubble entrainment inhibition effect is exerted.

[0169] 1: Bubble entrainment is completely not noticeable (the number of times of bubble entrainment is less than 10 times).

[0170] 2: Bubble entrainment is slightly noticeable (the number of times of bubble entrainment is 10 times or more and less than 20 times).

[0171] 3: Bubble entrainment is slightly noticeable and there is a sense of discomfort (the number of times of bubble entrainment is 20 times or more and less than 30 times).

[0172] 4: Bubble entrainment is noticeable (the number of times of bubble entrainment is 30 times or more and less than 40 times).

[0173] 5: Bubble entrainment is very noticeable (the number of times of bubble entrainment is 40 times).

[0174] <Pump operability>

[0175] After filling 100 ml of each toothpaste composition shown in Table 1 into the container body of each upright bottle container, install an airless pump member and seal it, and store it at 25 °C for 24 hours. Then, press the center part of the pump button once and conduct a sensory evaluation on the situation where the button returns to the original state. The smaller the value based on the following criteria, the more it means that: the toothpaste composition has excellent fluidity in the flow path, maintains good sprayability, does not cause adverse effects on the pump operability, and can effectively use up the toothpaste composition in the container.

[0176] 1: The button quickly returns to the original state.

[0177] 2: The button generally quickly returns to the original state.

[0178] 3: The button returns to its original state slightly slower.

[0179] 4: The button returns to its original state more slowly.

[0180] <Conformability>

[0181] After filling 115 g of each dentifrice composition shown in Table 1 into the container body of each upright bottle container, an airless pump member is installed and sealed, and it is stored at 25 °C for 24 hours. Then, about 2 g of the dentifrice composition is ejected from the ejection port of the bottle container onto the bristles of the toothbrush, and the fluidity or sagging of the dentifrice composition on the bristles is visually confirmed. Based on the following criteria, the conformability of the dentifrice composition is evaluated. The smaller the value based on the following criteria, the more excellent the conformability of the dentifrice composition.

[0182] 1: There is no flow at all.

[0183] 2: There is substantially no flow.

[0184] 3: It flows slightly, but does not sag from the bristles.

[0185] 4: It starts to flow immediately after ejection and sags from the bristles within 30 seconds.

[0186] 5: It sags from the bristles immediately after ejection.

[0187] [Table 1]

[0188]

[0189] ※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.

[0190] [Symbol Explanation]

[0191] 1: Dentifrice

[0192] 2: Container body

[0193] 21: Upper surface opening of the container body

[0194] 3: Airless pump member

[0195] 31: Pump

[0196] 32: Nozzle

[0197] 33: Dip tube

[0198] x1-1: Suction port

[0199] x1-2: Inlet valve

[0200] xd: Distance from the suction port to the inlet valve.

Claims

1. A dentifrice, wherein, the dentifrice is formed by filling a dentifrice composition (Y) into a vertical bottle container (X) at an initial filling rate of less than 100%, the vertical bottle container (X) is formed by connecting a non-aerosol pump member having a nozzle to an upper surface opening of a container body, the vertical bottle container (X) has a mechanism that, in conjunction with the operation of the pump, sucks the dentifrice composition (Y) from a suction port (x1-1) via a suction valve (x1-2) and ejects the dentifrice composition (Y) from a discharge port of the nozzle, in the vertical bottle container (X), before starting to use the dentifrice, the suction port (x1-1) is in a state of not being immersed in the dentifrice composition (Y), 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), the Helipath viscosity (y1) of the dentifrice composition (Y) at 25°C is 1300 dPa·s or more and 3000 dPa·s or less, and 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.

2. The dentifrice according to claim 1, wherein, the dentifrice composition (Y) contains sodium carboxymethyl cellulose (yA) with an etherification degree of less than 1.

3. The dentifrice according to claim 1 or 2, wherein, the dentifrice composition (Y) further contains one or more polyhydric alcohols (yB) selected from glycerin, propylene glycol, and polyethylene glycol.

4. The dentifrice according to any one of claims 1 to 3, wherein, the dentifrice composition (Y) further contains one or more sugar alcohols (yC) selected from erythritol, mannitol, sorbitol, xylitol, maltitol, and trehalose.

5. The dentifrice according to any one of claims 2 to 4, wherein, in the dentifrice composition (Y), the content of the component (yA) is 2% by mass or more and 5% by mass or less.

6. The dentifrice according to claim 4 or 5, wherein, in the dentifrice composition (Y), the mass ratio (yB) / (yC) of the content of the component (yB) to the content of the component (yC) is 0.4 or more and 1.3 or less.

7. The dentifrice according to any one of claims 4 to 6, wherein, the dentifrice composition (Y) contains water (yD), and the mass ratio ((yB)+(yC)) / (yD) of the total content of the component (yB) and the component (yC) to the content of the component (yD) is 0.5 or more and 1.5 or less.

8. The dentifrice according to any one of claims 1 to 7, wherein, the distance (xd) from the suction port (x1-1) to the suction valve (x1-2) is less than 50 mm.

9. A dentifrice kit, wherein, the dentifrice kit is composed of a vertical bottle container (X) and a dentifrice composition (Y), the vertical bottle container (X) is formed by connecting a non-aerosol pump member having a nozzle to an upper surface opening of a container body, The content of the water-insoluble powder (yx) in the tooth cleaning composition (Y) is less than 5% by mass, or the tooth cleaning composition (Y) does not contain the water-insoluble powder (yx). The Helipath viscosity (y1) of the tooth cleaning composition (Y) at 25°C is 1300 dPa·s or more and 3000 dPa·s or less, and the ratio (y1) / (y2) of the Helipath viscosity (y1) of the tooth cleaning composition (Y) at 25°C to the B8H viscosity (y2) at 25°C is 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 from the suction port (x1-1) via the suction valve (x1-2) and ejected from the ejection port of the nozzle. The initial filling rate of the tooth cleaning composition (Y) in the upright bottle container (X) is less than 100%, and in the upright bottle container (X), before starting to use the toothpaste kit, the suction port (x1-1) is in a state of not being immersed in the tooth cleaning composition (Y).

Images