Liquid dispenser for inverted containers

Abstract

To provide a dispenser, which dispenses a dishwashing product and when a product contains a low-viscosity liquid, enables improved dispensing of a liquid composition, particularly at low dosages, while also providing enhanced leakage prevention.SOLUTION: Even for low-viscosity liquids, the need for a liquid dispenser and an inverted container that offer improved administration of liquid compositions, especially at low dosage, while being more resistant to leakage, is met by incorporating a shock-resistant system into the dispenser, which includes internal walls that are higher than an opening allowing the liquid to enter the shock-resistant system.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a liquid dispenser for dispensing liquid from an inverted container and an inverted container comprising the same. [Background technology]

[0002] Containers with a spout for dispensing liquid are well known in the art, particularly in the field of dishwashing products. These bottles have an opening located at the top and are typically referred to as "top-up bottles." To dispense liquid, consumers typically must open the cap to expose the spout, then invert and squeeze the bottle to dispense the liquid. These top-up bottles present several problems. First, even if the bottle is not squeezed, liquid spills when the bottle is inverted, making it difficult to control the amount of liquid dispensed from the bottle. This can also cause liquid to spill when the bottle is turned right-side up after use. Second, these bottles tend to leave liquid around the periphery of the spout, making them appear dirty. The liquid also tends to dry, forming a crust. When the crust accumulates, it eventually blocks the spout. Third, the poor ergonomic design of these bottles causes consumer inconvenience. For example, constantly twisting the wrist to administer liquid from a top-up bottle can be uncomfortable or difficult for consumers, especially when using larger sized bottles and / or for older consumers.

[0003] Furthermore, dispensing the last few doses of a liquid composition from a top-up bottle can be a time-consuming process, as the composition must be forced down the sides of the bottle. Finally, the presence of a closure cap or seal required to prevent solvents / other volatiles (e.g., fragrances) from evaporating requires additional consumer manipulation, making the bottle less user-friendly. All of these issues contribute to consumer dissatisfaction with these top-up bottles.

[0004] As a result, "inverted containers" are popular with consumers. Inverted containers have an opening at the "bottom" for dispensing liquid and are used upside down. Inverted containers typically rest on their bottom when placed on a horizontal surface. Inverted containers generally comprise flexible bottles with capped spouts. Improvements to such systems may include an elastomeric valve at the outlet (see, e.g., WO 2004 / 02843 (Method Products) and U.S. Pat. No. 5,213,236(A) (AptarGroup Inc)). The purpose of the valve is to control the volume of liquid dispensed and minimize leakage from inverted containers so that liquid does not leak unless force is applied to the container.

[0005] A particular challenge with these types of inverted containers is preventing leakage of the liquid contained therein during steady-state conditions (i.e., storage) and / or upon impact, particularly upon impact. For example, leakage can occur during storage when the inverted container is exposed to temperature changes, specifically elevated temperatures (e.g., an inverted container placed next to a sunny window or near the top of a stove), which can lead to an increase in internal pressure and leakage. Specifically, "impact" refers to when the inverted container is handled, transported, dropped, or knocked over. As a result of impact, a temporary increase in liquid pressure occurs inside the container, also known as hydraulic hammer pressure, which can momentarily force open a valve, causing liquid leakage and resulting in consumer dissatisfaction with the product. Previous attempts to overcome the leakage problem have involved the inclusion of closure caps (see, e.g., Chinese Patent No. 2784322(U) (Liu Zhonghai) and International Publication No. 2014 / 130079 (Dow Global Technologies)). However, including a closure cap means an additional step of opening the closure cap for administration and then reclosing it after the administration process, which is undesirable for consumers. Furthermore, the cap does not prevent liquid staining and dried crusts of liquid around the spout / cap. Other attempts have incorporated baffles on the top of the elastomeric valve (see, e.g., JP 2007 / 176594 (Lion) and WO 2000 / 68038 (Aptar Group)), which do not completely solve the problem of leakage, particularly when the inverted container is impacted, specifically when the valve is dropped or tipped. The need for an improved liquid dispenser for an inverted container that substantially reduces or prevents the tendency of the valve to open when the inverted container is impacted, particularly when dropped or tipped, has been met by the use of dispensers such as those described in EP 3492400 (B1) and EP 3511402 (B1). However, it remains difficult to administer the exact amount of liquid composition contained in the inverted container, especially for small dose sizes. This is because the valve contained within the dispenser typically has an opening pressure above which liquid is dispensed.Once the opening pressure is reached, the valve typically suddenly opens, releasing the pressure before closing, thus causing the liquid contained therein to gush out. Furthermore, leak prevention remains difficult for bottom dispensing containers, especially those containing liquids with low viscosity. JP 02127252(A) attempts to prevent liquid leakage by providing a liquid path in the body for discharging the liquid from the device, which includes a passage having a first opening that opens at the open end and a second opening located above the open end, so that the liquid is guided upward from the open end of the mouth. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] International Publication No. 2004 / 02843 [Patent Document 2] U.S. Patent No. 5,213,236(A) [Patent Document 3] Chinese Patent No. 2784322(U) [Patent Document 4] International Publication No. 2014 / 130079 [Patent Document 5] JP 2007 / 176594 [Patent Document 6] International Publication No. 2000 / 68038 [Patent Document 7] European Patent No. 3492400(B1) [Patent Document 8] European Patent No. 3511402(B1) [Patent Document 9] Japanese Patent Application Publication No. 02127252(A) Summary of the Invention [Problem to be solved by the invention]

[0007] Thus, there remains a need for such dispensers that provide improved dosing of liquid compositions, particularly at low doses, while also providing improved leak prevention, particularly when involving liquids having low viscosity. [Means for solving the problem]

[0008] The present invention provides a liquid dispenser for attachment to an inverting container containing a dispensable liquid, the dispenser comprising: a dispenser body having a connecting sleeve, the connecting sleeve being adaptable to engage an outer surface of the inverting container adjacent an opening thereof and defining an internal discharge conduit spaced radially inwardly therefrom for establishing fluid communication with the liquid contained within the inverting container; a valve located within the body extending across the internal discharge conduit, the valve having an inner side in contact with the liquid contained within the inverting container and an outer side exposed to the external atmosphere, the valve defining a dispensing orifice responsively openable when pressure inside the valve exceeds pressure outside the valve; and an anti-shock system located upstream of the valve, the anti-shock system having an internal cavity and extending from the body. and an anti-shock system comprising: a housing extending longitudinally and radially inward from the sleeve; and a wall disposed radially inward from the housing, extending longitudinally from the body and extending around the valve, the housing comprising at least one inlet opening providing a flow path for liquid from the inverted container into the housing and at least one outlet opening providing an exit path for liquid from the housing to the outside atmosphere when the dispensing orifice is opened, the cavity being adapted to be partially occupied by a compressible material, the at least one inlet opening being proximate to the body and the at least one inlet opening having an inlet opening height, the wall extending longitudinally from the body an overlap distance beyond a lower edge (38) of the at least one inlet opening, the ratio of the overlap distance to the inlet opening height being 1.25 or greater. [Brief explanation of the drawings]

[0009] While this specification concludes with claims particularly pointing out and distinctly claiming the invention, it is believed the same will be better understood from the following description of the accompanying drawings, in which like numerals are used to designate like parts throughout. [Figure 1] 1 shows a perspective view of a liquid dispenser (1) according to one embodiment of the present invention connected to an inverted container (2) with a side wall (3), with the section line 9-9 also shown. [Figure 2] 1 shows a perspective view of a liquid dispenser (1) according to one embodiment of the present invention, including a body (10) and an anti-shock system (30). [Figure 3] 1 shows a perspective view of a body (10) used in a liquid dispenser (1) according to the present invention, before incorporation of an anti-shock system (30), also showing a connecting sleeve (11), an internal discharge conduit (12), an outer portion (14) and a central portion (15) of the body (10), and a top end (A) and a bottom end (B). [Figure 4] 1 shows a top view of the interior (21) of a valve (20) used in a liquid dispenser (1) according to the present invention, showing a dispensing orifice (23) and its components: a flexible central portion (24), a slit (25), a distal end (26) of the slit (25), and a flap (27) formed by the slit (25). [Figure 5] FIG. 5 is a plan side view of the valve (20) of FIG. 4, further showing the outer edge (28b) of the peripheral flange of the valve (20). [Figure 6] FIG. 5 is a cross-sectional view of the valve (20) of FIG. 4, further showing the outer side (22) of the valve, in addition to the inner edge (28a), outer edge (28b), bottom (28c), and top (28d) with outer edge (28e) of the peripheral flange (28). [Figure 7] 1 shows a perspective view of an anti-shock system 30 for use in a liquid dispenser 1 according to the invention, with the housing 31, the location of the inlet opening 33a and the outlet opening 33b also shown. [Figure 8] 8 shows an angled cross-sectional view of the anti-shock system (30) of Figure 7. Also shown are the valve (20), cavity (32) and wall (60). [Figure 9] 8 shows a cross-sectional view of the anti-shock system (30) of FIG. 7 connected to the body (10). Also shown are the upper and lower retention surfaces (29a, 29b) for securing the valve (20). Also shown is a visual indication of the inlet opening height (H) and overlap distance (O). [Figure 10] 8 shows a cross-sectional view of an anti-impact system (30) similar to that of FIG. 7, but further comprising a baffle (40). [Figure 11] 10 shows an angled cross-sectional view of the anti-impact system (30) of FIG. 10, showing the baffle (40) in perspective view, with its closure member (41) supported by a support member (42). [Figure 12] 9 shows a cross-sectional view of the liquid dispenser (1) of FIG. 1 along section line 9-9, including the anti-shock system (30) of FIG. 10, with a valve defining a dispensing orifice (23). [Figure 13] The drop test equipment and procedures for the leak resistance test are shown below. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention provides a liquid dispenser as described herein that can substantially reduce or eliminate the tendency of the valve to open when the inverted container is impacted, particularly when dropped or tipped, so that the liquid does not leak, while also providing more accurate dosing, particularly at low dose sizes, and improved leak protection, particularly for liquids having low viscosity.

[0011] Another object of the present invention is to provide a liquid dispenser, as described herein, that prevents steady-state leakage of liquid. Advantageously, the valve remains closed during storage of the inverted container, thereby preventing liquid from leaking unless a force is intentionally applied to the inverted container to dispense the liquid. This avoids messy liquid drying out near the dispensing orifice, which could potentially prevent the liquid from being dispensed, or staining the storage area, which could ultimately lead to surface damage if stored on a delicate surface. Sensitivity to leakage is particularly reduced under static storage conditions when storing low-viscosity liquids.

[0012] It is a further object of the present invention to provide a liquid dispenser as described herein that allows for easy and accurate dosing without the need to turn the container upside down. This is believed to contribute to a faster and more ergonomic dosing experience (i.e., more comfortable, less stress on the wrist, less force required, etc.). For example, fewer steps are required with a traditional top-up bottle, which may include a closure cap or seal, or an upside-down container, and no awkward twisting movement of the hand is required to turn the bottle upside down and dispense the liquid.

[0013] Yet a further object of the present invention is to provide a liquid dispenser as described herein that allows access to every last drop of liquid in an inverted container, thereby minimizing waste, which is an advantage of the present invention.

[0014] The present invention also has the advantage of allowing a larger formulation window of operable viscosities, as the formulator can now include liquids with a larger viscosity range, particularly liquids with lower viscosities which tend to be more susceptible to leakage.

[0015] Another advantage of the present invention is that it allows for use with larger size containers (e.g., greater than 450 mL). The improved liquid dispenser is expected to allow for a higher weight capacity for the elastomeric valve, thereby substantially reducing / preventing liquid leakage when used with larger, inverted containers.

[0016] These and other features, aspects, and advantages of the present invention will become apparent to those skilled in the art from the following detailed description.

[0017] It is to be understood that the claims are not limited to the specific devices, apparatus, methods, conditions or parameters described and / or illustrated herein, and that the terminology used herein is used by way of example only for the purpose of describing particular embodiments of the invention and is not intended to limit the invention as claimed.

[0018] As used herein, articles such as "a" and "an" used in the claims are understood to mean one or more of what is claimed or described.

[0019] As used herein, the terms "comprising," "having," "containing," and "including" all mean that other steps, ingredients, elements, etc. may be added that do not adversely affect the end result. Each of these terms encompasses the terms "consisting of" and "consisting essentially of." Unless otherwise specified, elements and / or equipment herein are believed to be widely available from numerous suppliers and sources worldwide.

[0020] As used herein, the term "compressibility" refers to the ability of a substance to reduce in volume under the influence of increased pressure, the reduction in volume being at least 1%, preferably at least 5%, and most preferably at least 10%.

[0021] As used herein, the term "consumer" is meant to include a customer who purchases a product as well as a person who uses a product.

[0022] As used herein, the term "hydraulic hammer pressure" refers to a momentary pressure increase caused when liquid in an inverted container is forced to suddenly stop or change direction (i.e., change momentum), typically as a result of an impact on the inverted container. Hydraulic hammer pressure may also be referred to as an "impact force." If the hydraulic hammer pressure is not absorbed in some way by the liquid dispenser, the force may (momentarily) open a valve, causing liquid leakage.

[0023] The terms "include / includes / including" are meant to be non-limiting.

[0024] As used herein, the term "liquid" refers to any liquid, including highly viscous materials (e.g., lotions and creams), suspensions, mixtures, and the like. For example, a "liquid" may constitute a personal care product, a food product (e.g., ketchup, mayonnaise, mustard, honey, and the like), an industrial or household cleaning product (e.g., laundry detergent, dishwashing detergent, and the like), or other material composition (e.g., compositions for use in activities including manufacturing, commercial or household maintenance, personal / beauty care, baby care, medical procedures, and the like). A primary target liquid is liquid hand dishwashing detergent. The liquid product, preferably a liquid detergent product, and more preferably a liquid hand dishwashing product, can have any density, but the liquid preferably has a density of 0.5 g / mL to 2 g / mL, more preferably 0.8 g / mL to 1.5 g / mL, and most preferably 1 g / mL to 1.2 g / mL.

[0025] As used herein, the term "steady state" refers to the constant pressure characteristic of the liquid inside the container when the container is at rest.

[0026] Dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as "1.2 cm" is intended to mean "approximately 1.2 cm."

[0027] It will be understood that the test methods disclosed in the Test Methods section of this application must be used to determine the values ​​of each of the parameters of Applicants' inventions described and claimed herein.

[0028] In all embodiments of the present invention, unless specifically stated otherwise, as is clear from the context, all percentages are by weight of the total composition, all ratios are by weight unless specifically stated otherwise, and all measurements are made at 25°C unless otherwise specified.

[0029] Liquid Dispenser For ease of explanation, the liquid dispenser (1) of the present invention will be described in terms such as upper / top, lower / bottom, horizontal, etc., with reference to the state shown in Figure 1. With continued reference to Figures 1 and 12, however, it will be understood that the liquid dispenser (1) of the present invention is used in conjunction with an inverted container (2), where liquid is dispensed from the bottom of the inverted container (2). The liquid dispenser (1) can be attached, and preferably removably attached, to the inverted container (2). Thus, the liquid dispenser (1) preferably includes a means for attachment to the inverted container, such as a screw thread (as shown in Figures 9 and 12), or one half of a lock-and-key mechanism, or a surface adapted for adhesive or heat sealing.

[0030] The liquid dispenser (1), or at least certain components of the dispenser (1), can be made from any material that can be molded or formed while being durable enough to withstand shipping and normal wear and tear from constant exposure to liquids. The components of the dispenser (1) may be molded separately or from different materials. The materials for different components may have the same or different colors and textures for aesthetic purposes, unless otherwise specified. Preferably, the components are molded from a hard plastic, more preferably a thermoplastic material such as polypropylene (PP), polycarbonate, polyethylene (PE), polyvinylchloride (PVC), or the like. One or more of the components of the liquid dispenser may also be partially or completely comprised of post-consumer recycled materials from bottles, other containers, and the like. As shown in FIG. 2, the liquid dispenser (1) comprises three basic components: a body (10), a valve (20) (not shown), and an anti-shock system (30). Preferably, the liquid dispenser (1) does not have a closure cap or seal. Typically, the seal is included for shipping and is removed and discarded after the first use of the liquid dispenser (1).

[0031] Main unit As shown in FIG. 3 , the liquid dispenser (1) comprises a body (10). The body (10) includes, at its upper end (A), a connection sleeve (11) adapted to releasably engage with an outer surface of the inverted container (2) adjacent to the opening (5) (not shown). Preferably, this arrangement provides a leak-tight contact between the liquid dispenser (1) and the inverted container (2), making the liquid dispenser (1) tightly sealed against leakage. Alternatively, the connection sleeve (11) may be adapted to releasably engage with an inner surface of the inverted container (2) adjacent to the opening (5) (not shown). In other words, the inverted container (2) is attached to the connection sleeve (11) located horizontally outside the body (10) of the liquid dispenser. However, this alternative arrangement is less preferred because it increases the risk of liquid leakage through the contact between the dispenser (1) and the inverted container (2).

[0032] Body (10) may be releasably engaged with opening (5) (not shown) of inverted container (2) by suitable attachment means commonly known to those skilled in the art, including, by way of non-limiting example, cooperating threads, crimping, cutout means, clasp means, snap-fit ​​means, groove arrangement, bayonet fit, or permanent welding. Preferably, external threads on the exterior surface of opening (5) (not shown) of inverted container (2) thread into internal threads molded on connecting sleeve (11) (as shown in FIG. 3).

[0033] The body (10) includes a central portion (15) disposed axially along a longitudinal axis (L). The connecting sleeve (11) is spaced radially inward toward the central portion (15) and defines an internal discharge conduit (12). The discharge conduit (12) serves as a flow path for establishing fluid communication between the liquid contained in the inverted container (2) and the external atmosphere. It will be appreciated that, during use, the connecting sleeve (11) forms a fluid seal between the liquid dispenser (1) and the inverted container (2), thereby allowing liquid to enter the liquid dispenser (1) without leakage.

[0034] Preferably, the body (10) includes an outer portion (14) at the bottom end (B) adapted to allow the inverted container (2) to rest stably on a flat surface (as shown in FIG. 1). The outer portion (14) may be integrally formed with the body (10). For example, the outer portion (14) may include an annular flange structure (e.g., a skirt) extending axially downward toward the bottom (B) and radially outward, as shown in FIG. 3. While FIG. 3 illustrates the outer portion (14) of the body (10) having a frustoconical shape, it is not necessarily limited to this shape. Other shapes, such as a cylindrical, pyramidal, disk-shaped, multiple-legged, etc., may be used as long as they allow the inverted container (2) to rest stably on its bottom.

[0035] While the body 10 is shown and described herein, it should be understood that there are many variations that may be desirable depending on specific requirements. For example, while the connection sleeve 11 and the outer portion 14 are shown as having a uniform material thickness, varying material thickness may be desirable in some applications. As a further example, while some surfaces are described herein as having particular shapes (e.g., frustoconical, flat, etc.), other particular shapes for those surfaces may be desirable depending on the particular application.

[0036] valve The liquid dispenser (1) further comprises a valve (20) located within the body (10) that extends across the internal discharge conduit (12). As shown in Figures 4-6, the valve (20) has an interior side (21) that is in contact with the liquid contained within the inverted container (2) and an exterior side (22) (as shown in Figure 6) that is exposed to the external atmosphere. The valve (20) defines a dispensing orifice (23) that is openable in response to pressure on the interior side (21) of the valve exceeding pressure on the exterior side (22) of the valve.

[0037] Valve 20 is preferably a flexible, elastomeric, resilient, two-way, self-closing slit-type valve mounted within body 10. Valve 20 has one or more slits 25 defining a dispensing orifice 23. For example, dispensing orifice 23 may be formed from a single slit 25 or two or more intersecting slits 25 that can open to allow liquid to be dispensed through the slit in response to an increase in pressure inside inverted container 2, such as when inverted container 2 is squeezed. Valve 20 is typically designed to respond to a decrease in the pressure differential across valve 20 by closing dispensing orifice 23, thereby preventing liquid from flowing through the dispensing orifice. The amount of pressure required to maintain valve 20 in a closed position depends in part on the internal resistance of valve 20. The "internal resistance" (i.e., cracking pressure) refers to a predetermined resistance threshold to deformation / opening of the valve (20). In other words, the valve (20) does not tend to resist deformation / opening, thereby remaining closed under steady-state liquid bearing pressure against the inside (21) of the valve (20). The amount of pressure required to deform / open the valve must overcome this internal resistance. This internal resistance must not be too low so as to cause liquid leakage, nor too high so as to make dispensing a dose of liquid difficult. Therefore, the valve (20) preferably has an internal resistance of at least 10 mbar, preferably at least 25 mbar, more preferably less than 250 mbar, even more preferably less than 150 mbar, and most preferably less than 75 mbar. Preferably, the dispensing orifice (23) is designed to be in the open position when there is a pressure difference (Δ) of at least 10 mbar, preferably at least 25 mbar, between the inside (21) of the valve relative to the valve on the outside (22). Preferably, the force exerted on the inside of the valve (21) required to open the dispensing orifice (23) is at least 10 mbar, preferably at least 25 mbar. Preferably, the valve (20) has a pressure of 0.1 cm 2 ~10cm 2 , more preferably 0.3 cm 2 ~5cm 2 , most preferably 0.5 cm2 ~2cm 2 Preferably, the valve (20) has a height of 1 mm to 10 mm, more preferably 2 mm to 5 mm. Other dimensions may be used as long as the dispensing orifice (23) remains in a fully closed position at rest.

[0038] As shown in FIGS. 4-6, the valve (20) comprises a flexible central portion (24) having at least one, preferably at least two, and preferably a plurality (i.e., three or more) of flat, self-sealing slits (25) extending radially outward toward the distal end (26). It should be understood that a slit valve is intended to refer to any valve having one or more slits in its final functional configuration, including a valve in which one or more of the slits are only fully completed after the valve is formed and / or installed within the liquid dispenser (1). Each slit (25) preferably terminates just before reaching the distal end (26) of the valve (20). Preferably, the slits (25) are straight (as shown in FIG. 4) or may have a variety of different shapes, sizes, and / or configurations (not shown). Preferably, intersecting slits (25) are equally spaced from one another and of equal length.

[0039] Valve 20 is typically designed to close internal exhaust conduit 12 and stop the flow of liquid through conduit 12 when the pressure differential across valve 20 decreases. The amount of pressure required to open valve 20 depends in part on the internal resistance of valve 20. "Internal resistance" (i.e., cracking pressure) refers to a predetermined resistance threshold to deformation / opening of valve 20. In other words, valve 20 tends to resist deformation / opening so that it remains closed under steady-state liquid bearing pressure against the interior 21 of valve 20. The amount of pressure required to deform / open valve 20 must overcome this internal resistance. This internal resistance should not be so low as to cause liquid leakage. Thus, the valve (20) has an opening pressure differential from the inside (21) to the outside (22) of the valve (20) of at least 10 mbar, preferably at least 15 mbar, more preferably at least 25 mbar, measured at 20° C. The internal resistance should not be so high as to make it difficult to dispense the dose of liquid.

[0040] Particularly when the inverted container (2) contains a low viscosity liquid, the use of a valve (20) that opens at a relatively low pressure difference helps to avoid the composition from spraying out of the valve (20). It is preferred that the valve (20) opens at a pressure difference of 10 to 250 mbar, preferably 15 to 150 mbar, more preferably 25 to 75 mbar, measured at 20°C.

[0041] Furthermore, the use of a valve 20 that opens at such a low pressure differential also means that a smaller pressure differential is required to draw air through the valve 20 so that the container 2 can return to its original shape upon removal of the squeeze. This is particularly important in the case of inverted containers 2 that include more elastic containers 2, because an insufficient pressure differential across the valve 20 means that not enough air can be drawn through the valve 20 into the container 2 to allow the container 2 to return to its undeformed shape.

[0042] The opening pressure differential (mbar) is typically measured using a water column with the slit valve sealingly attached to the bottom of the column, and then measuring the height of water required to open the slit valve at the target temperature. The opening pressure is typically available from the valve manufacturer, including in the technical literature provided for the valve.

[0043] Continuing with FIG. 4, the intersecting slits (25) define four, approximately sector-shaped, equally sized flaps (27) in the valve (20). The flaps (27) can be characterized as openable portions of the valve (20), which change configuration between a closed rest position (as shown in FIG. 4) and an open position in response to a pressure differential. The valve (20) is designed to be flexible enough to regulate venting to the outside atmosphere. For example, when the valve (20) is closed, if the pressure on the outside (22) of the valve exceeds the pressure on the inside (21) of the valve by a predetermined amount, the closure flaps (27) or openable portions can continue to move inward through a closed position, opening the valve flaps (27) inward. This ability to vent to the outside atmosphere helps equalize the internal pressure within the inverted container (2). It will be appreciated that the valve 20 is designed so that the opening pressure for venting and returning air to the inverted container 2 is low enough to avoid panel-like deformation of the inverted container 2 during use. In other words, the resilience of the inverted container 2 to return to its original shape after use (i.e., squeezing force) is greater than the vent opening pressure.

[0044] Preferably, the valve 20 does not contact the surface on which the inverted container 2 stands when at rest, nor does it contact the surface being cleaned during administration. To date, the valve 20 has been positioned to extend into the body 10, preferably at least 1 mm, more preferably at least 5 mm, and even more preferably at least 1 cm from the resting surface. Positioning the valve 20 upward and out of contact with the surface reduces the risk of capillary leaching through the valve 20 during storage of the inverted container 2, which could result in surface contamination and potentially damage.

[0045] Valve 20 is preferably molded as a unitary structure from a flexible, pliable, resilient, and elastic material. Suitable materials include thermosetting polymers, including silicone rubber (available as DC99-595-HC from Dow Corning Corp., USA, or WACKER 3003-40 silicone rubber material from Wacker Silicone Co.), preferably having a hardness ratio of 40 Shore A, linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), LLDPE / LDPE blends, acetate, acetal, ultra-high-molecular weight polyethylene (UHMW), polyester, urethane, ethylene vinyl acetate (EVA), polypropylene, high-density polyethylene, or thermoplastic elastomer (TPE). Valve 20 can also be formed from other materials such as thermoplastic propylene, ethylene, and styrene, including their halogenated counterparts. Suitable valves are commercially available from companies such as APTAR Company, including the SimpliSqueeze® valve product line.

[0046] As shown in Figures 8-11, the valve (20) can be located within the body (10) or the shock resistant system (30) and provide the dispensing orifice (23). As shown in Figures 9 and 10, the valve (20) is preferably located within the body (10) below the outlet opening (33b) and provides an exit path for the liquid from the housing (31) to the outside atmosphere when the dispensing orifice (23) is opened.

[0047] As shown in FIGS. 4-6, in addition to the central portion 24, the valve 20 typically includes a peripheral flange 28 that seals around the dispensing orifice 23. The peripheral flange 28 typically has an annular planar shape and a substantially L-shaped cross-sectional configuration, including an inner edge 28a, an outer edge 28b, a bottom portion 28c, a top portion 28d, and an upstanding outer edge 28e. The peripheral valve flange 28 has a substantial thickness between the bottom portion 28c and the top portion 28d, and is resiliently compressed between the upper and lower retention surfaces 29a and 29b to form a secure, leak-tight seal therebetween (see FIGS. 9 and 12). If present, the outer edge portion 28e of the peripheral flange 28 positively locks the valve 20, preventing any radial movement.

[0048] 9 and 10, the lower retaining surface 29b may be formed as part of the body 10 or housing 31, preferably the body 10. The upper retaining surface 29a is fixedly attached to or forms part of the body 10 or housing 31, preferably the housing 31.

[0049] The valve 20 is normally in a closed position and can withstand the pressure of the liquid within the inverted container 2 so that liquid does not leak unless the inverted container 2 is squeezed. Unfortunately, the design of the valve 20 is limited in its effectiveness in preventing liquid leakage from the interior of the inverted container 2 under all circumstances, particularly when the inverted container 2 is subjected to an impact, causing a significant, temporary increase in liquid pressure. Shock-resistant systems, such as those described in EP 3492400 B1, help absorb the temporary increase in liquid pressure after an impact and substantially reduce or prevent liquid leakage from the liquid dispenser 1. This improvement to the shock-resistant system 30 improves both leakage resistance from temporary liquid pressure increases after an impact and leakage resistance to pressure changes during storage, especially for low-viscosity liquids. This improvement to the shock-resistant system 30 also improves dosage control of the liquid composition contained therein.

[0050] Shock-resistant system According to the present invention, the liquid dispenser (1) further includes an anti-shock system (30) (as shown in FIG. 7) located upstream of the valve (20). The system (30) includes a housing (31) having a cavity (32) therein, as shown in FIGS. 8-12. The housing (31) extends longitudinally from the body (10) and radially inward from the sleeve (11), i.e., in a direction parallel to the axis "L" as shown in FIG. 3. The housing (31) is a substantially rigid structure and may be molded from a plastic material, preferably a thermoplastic material, more preferably polypropylene. As shown in FIGS. 7-12, the housing (31) is preferably substantially cylindrical and has a length along the longitudinal axis (L) of 10 mm to 200 mm, preferably 15 mm to 150 mm, more preferably 20 mm to 100 mm. The cylindrical housing (31) preferably has a diameter of 5 mm to 40 mm, preferably 10 mm to 30 mm. However, it should be understood that the housing 31 may have any desired size and shape, for example, oval, pyramidal, rectangular, etc. However, the size and shape of the housing 31 will necessarily be a function of the internal volume required for the compressible material. For example, if a larger volume of compressible material is required, a housing with a longer diameter may be preferred. Preferably, the housing 31 has a diameter of 200 mm or more. 3 ~250,000mm 3 , preferably 1,500 mm 3 ~75,000mm 3 Preferably, the compressible material has an internal volume of 1,000 mm 3 ~Maximum 20,000mm 3 , preferably 1,500 mm 3 ~Max 15,000mm 3 , most preferably 2,000 mm 3 ~Maximum 10,000mm 3 It has a volume of

[0051] Additionally, the housing 31 includes at least one inlet opening 33a that provides a liquid flow path from the inverted container 2 into the housing 31. Preferably, the inlet opening 33a is an opening between the discharge conduit 12 and the valve 20. The phrase "at least one" inlet opening 33a refers to one or more inlet openings 33a located on the housing 31. For example, it may be desirable to have one larger inlet opening 33a or multiple smaller inlet openings 33a. It is anticipated that the viscosity and density of the liquid contained within the inverted container 2 will be taken into consideration when designing the size, shape, and number of the inlet openings 33a. The inlet openings 33a function as openings that provide a liquid flow path for establishing fluid communication between the liquid contained within the inverted container 2 and the housing 31. As shown in FIGS. 7-12, the inlet openings 33a are preferably located near the bottom of the housing 31 and are preferably rectangular in shape. The inlet opening (33a) may have a length of 1 mm to 25 mm, preferably 5 mm to 20 mm, and a height of 1 mm to 10 mm, preferably 3 mm to 7 mm.

[0052] Other shapes and sizes of inlet openings (33a) are also operable as long as they still provide sufficient liquid flow from the inverted vessel (2) into the housing (31). For example, the housing (31) can include three small circular inlet openings (33a) spaced equidistantly near the bottom, or one semicircular opening encircling half of the housing (31). Preferably, the inlet openings (33a) are no larger than 1 mm. 2 ~250mm 2 , preferably 5 mm 2 ~150mm 2 , more preferably 15 mm 2 ~100cm 2 has a total surface area of

[0053] As shown in FIG. 9, at least one inlet opening (33a) has a lower edge (38) proximal to a valve (20) located within the body (10) and an upper edge (39) distal to the valve (20), such that the at least one inlet opening (33a) has an inlet opening height (H) measured parallel to the longitudinal axis L (see FIGS. 3 and 7). The inlet opening (33a) preferably has a height (H) of 0.5 mm to 7.5 mm, more preferably 1.0 mm to 6.0 mm, and more preferably 1.5 mm to 3.5 mm. When the housing (31) has one or more inlet openings (33a), the lower edge (38) is the lower edge (38) most proximal to a valve (20) located within the body (10), and the upper edge (39) is the upper edge (39) most distal from the valve (20).

[0054] Additionally, the inlet openings 33 a are preferably positioned toward the bottom of the housing 31. The lower edge 38 of the at least one inlet opening 33 a (i.e., the bottom of the at least one inlet opening) may be positioned at a longitudinal distance from the upper retaining surface 29 a of less than 5.0 mm, preferably less than 4.0 mm, and more preferably less than 3.0 mm.

[0055] As shown in Figure 9, the housing (31) further comprises at least one outlet opening (33b) which provides an exit path for liquid from the housing (31) to the outside atmosphere when the dispensing orifice (23) is open.

[0056] As shown in Figures 8-12, the housing (31) further comprises a cavity (32). The cavity (32) is a hollow, open space within the housing (31). The cavity (32) is adapted to be partially occupied by a compressible material. Preferably, the compressible material allows for pressure equalization between the inside (21) of the valve and the outside (22) of the valve, and can responsively close / maintain the dispensing orifice (23). In other words, prior to "impact" of the inverted container (2), the compressible material remains uncompressed at a pressure sufficient to keep the valve (20) closed and retain liquid within the inverted container (2). The cavity (32) is also partially occupied by liquid prior to "impact."

[0057] Preferably, the compressible material is selected from gas, foam, a soft material such as a sponge or balloon, another viscoelastic material (e.g., polysiloxane), or a piston, preferably gas, more preferably air. The compressible material may comprise a piston 34 (not shown) movable within a cavity 32 of the housing 31, the piston 34 being coupled to a tension member attached to the distal end of the housing 31 and sealingly dividing the cavity 32 into a first section 36 and a second section 37. When the hydraulic hammer acts on the inverting vessel 2, liquid flows from the inverting vessel 2 through the inlet opening 33a into the housing 31. The liquid pushes the piston 34 up into the cavity 32, correspondingly compressing the compressible material between the piston 34 and the top of the cavity, thereby reducing the downward pressure on the valve 20. After the hydraulic pressure exposure has passed, the compressible material decompresses, causing the piston (34) to return downwards and the liquid to return from the housing (31) through the inlet opening (33a) and into the inverted vessel (2).

[0058] Alternatively, the compressible material may comprise a spring-loaded piston 34 (not shown), where the spring functions as the compressible material. For example, the volume above the piston 34 is filled with liquid, and upon impact, the momentary hydraulic hammer force compresses a spring connected to the piston 34, causing the liquid in the volume above the piston 34 to escape through a small opening into the inverted vessel 2. The net result is a resulting net reduction in downward pressure on the valve 20, allowing the valve to remain closed during the impact. After the hydraulic pressure exposure has passed, the spring decompresses, returning the piston 34 downward, and liquid from the inverted vessel 2 back into the volume above the piston 34 through the small opening.

[0059] Alternatively, the compressible material may comprise a flexible bellows dome (55) (not shown), where a momentary hydraulic hammer force causes the bellows dome (55) to expand, filling the cavity (32) of the shock-resistant system (30) with liquid, thereby reducing the downward pressure on the valve (20). After the hydraulic pressure exposure has passed, the flexible bellows dome (55) contracts, returning the flexible bellows dome (55) to its starting shape, and liquid flows from the housing (31) back into the inverted vessel (2) through the inlet opening (33a). It will be understood that the flexible bellows dome (55) may be made of any flexible material known to those skilled in the art.

[0060] Alternatively, the compressible material may comprise a gas-filled balloon 50 (not shown), where a momentary hydraulic hammer force compresses the balloon 50, allowing the cavity 32 of the shock resistant system 30 to fill with liquid, thereby reducing the downward pressure on the valve 20. After the hydraulic pressure exposure has passed, the balloon 50 again expands to its starting shape, and the liquid flows back from the housing 31 through the inlet opening 33 a and into the inverted vessel 2.

[0061] Alternatively, the compressible material may comprise a flexible membrane 51 and a closed cavity 52 (both not shown), where a momentary hydraulic hammer force pushes the flexible membrane 51 upward, compressing the air in the closed cavity 52 and allowing the cavity 32 of the shock-resistant system 30 to fill with liquid, thereby reducing the downward pressure on the valve 20. After the hydraulic pressure exposure has passed, the flexible membrane 51 returns to its starting position and the liquid flows back from the housing 31 through the inlet opening 33a and into the inverted vessel 2.

[0062] When the inverting container 2 is impacted, dropped, or toppled, the displacement of liquid within the inverting container 2 causes a transient increase in liquid pressure (i.e., a hydraulic pressure hammer). This elevated transient liquid pressure travels from inside the inverting container 2 through the inlet opening 33a to the housing 31 and the interior of the valve 21. The elevated transient liquid pressure is sufficient to overcome the combined force of the internal resistance force of the valve 20 as described hereinabove and the opposing external atmospheric pressure acting on the exterior of the valve 22. This causes the valve 20 to accidentally momentarily open, causing liquid to leak from the liquid dispenser 1 under such conditions.

[0063] The purpose of the shock-resistant system (30) is to divert shock-induced liquid movement (i.e., elevated transient liquid pressure) away from the valve interior (21) and toward the compressible material. As shown in FIG. 12, the elevated transient liquid pressure compresses the compressible material in the cavity (32), absorbing the pressure increase and allowing pressure equilibration between the valve interior (21) and the valve exterior (22). As a result, the dispensing orifice (23) is able to remain responsively closeable under these conditions, thereby substantially reducing or eliminating the tendency of the valve (20) to open during a shock. The inventors have discovered that the preferred ratio of the volume of gas, preferably air, inside the enclosure (31) at steady state to the volume of the inverted vessel is greater than 0.001, preferably between 0.005 and 0.05, and more preferably between 0.01 and 0.02, to maintain the responsive closeability of the dispensing orifice (23). Without being bound by theory, it is believed that a minimum compression threshold is desirable to significantly reduce or prevent the risk of leakage under expected exposure conditions during shipping or use, and this minimum compression threshold directly correlates to the volume of liquid that can be stored within the invertible container (2).

[0064] For example, larger-sized inverted vessels (2) can hold larger liquid volumes. When these larger-sized inverted vessels (2) are impacted, a larger mass of liquid is displaced during the hydraulic hammer, resulting in a larger transient liquid force (F=m×a—Newton's second law, where "F" is force, "m" is the mass of the displaced liquid, and "a" is the acceleration rate of the displaced liquid) and therefore pressure on the housing (31). Because there is a limit to how much transient pressure can be absorbed per unit volume of compressible material, once that threshold is exceeded, the remaining transient pressure will be transferred onto the valve (20) and, accordingly, cause leakage. Therefore, a larger volume of compressible material is required when a larger volume of liquid enters the inverted vessel (2) to provide a sufficient shock buffer to prevent leakage during the final hydraulic hammer exposure.

[0065] In some applications, it may be desirable to use a liquid dispenser 1 with an optional baffle 40. Preferably, the baffle 40, if present, is positioned between the interior 21 of the valve 20 and the shock-resistant system 30. As shown in FIG. 12, the baffle 40 may include a closure member 41 supported by at least one support member 42. Without being bound by theory, it is believed that the baffle 40 acts as an additional counterforce against the hydraulic hammer, thereby further reducing potential leak risks. In other words, the baffle 40 functions as a breaker to protect the valve 20 from the turbulent kinetic energy of the hydraulic hammer. Suitable custom baffles 40 are available from APTAR GROUP.

[0066] As illustrated in FIGS. 8-12, the shock-resistant system includes a wall 60 disposed radially inward from the housing 31, extending longitudinally from the body 10 and surrounding the interior of the valve 21. The wall 60 extends longitudinally from the body 10 into the cavity 32 beyond the lower edge 38 of at least one inlet opening 33a by an overlap distance (O) such that the ratio of the overlap distance (O) to the inlet opening height (H) is 1.25 or greater, or between 1.25 and 10, preferably between 1.5 and 7.0, and more preferably between 2.0 and 4.0. The wall 60 is preferably annular (cylindrical) in shape. The wall 60 may extend longitudinally from the upper support surface 29a by a distance of 4.5 mm to 30 mm, preferably between 6.0 mm and 20 mm, and more preferably between 7.5 mm and 15 mm.

[0067] In addition to improving resistance to leakage due to the hydraulic hammer effect, dispensers with walls (60) as described herein also allow for better dosing of smaller amounts, as well as improved leak protection, especially for low viscosity liquids.

[0068] Inverted container It will be clear that the present invention can be used with any type of container. Preferably, the liquid dispenser (1) is used with an inverted container (2) type, as shown in FIG.

[0069] The inverted container (2) may be of any suitable shape or design, as long as it can be placed in an inverted position as described above, the details of which do not form part of the present invention, which is directed to the liquid dispenser (1). The inverted container (2) may be made of any flexible plastic material, such as a thermoplastic polymer. The flexible material is sufficiently compressible to deform the inverted container (2), allowing for the dispensing of liquid, and yet is sufficiently flexible to allow relatively rapid shape recovery from deformation after dispensing. Preferably, the flexible plastic material is polycarbonate, polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), or the like, or a blend or multilayer structure thereof. The flexible plastic material may also include a specific moisture or oxygen barrier layer, such as ethylene vinyl alcohol (EVOH). The flexible plastic material may also be partially or completely comprised of post-consumer recycled materials, such as from bottles or other containers. The inverted container (2) includes an opening (5) (not shown) to allow liquid to pass from the inverted container (2) to the liquid dispenser (1). Referring to Figure 1, the opening (5) (not shown) is located at the bottom of the inverted container (2). In other words, the inverted container (2) is dispensed from the bottom.

[0070] Preferably, the liquid dispenser (1) does not include a closure cap or seal suitable for closing the dispensing orifice (23). Not including a closure cap or seal is advantageous so that a consumer can more easily and quickly dispense liquid from the interior of the inverted container (2) without having to go through the additional step of opening the cap. Additionally, the closure cap may be accidentally removed from the container (2), or a consumer may forget or fail to properly reclose the cap on the inverted container (2), preventing liquid leakage.

[0071] The inverted container (2) is preferably a squeezable inverted container (2) having at least one, preferably at least two, elastically deformable side walls (3). Preferably, the inverted container (2) is characterized by a deflection of 5N to 30N for a 15mm side wall, preferably a deflection of 10N to 25N for a 15mm side wall, and more preferably a deflection of 18N for a 15mm side wall (3). The inverted container (2) can be grasped by a consumer, who can squeeze or compress the elastically deformable side wall (3) to apply pressure (also referred to as "applied force") and compress the compressible material within the space (32). As a result, internal pressure increases, causing liquid between the inverted container (2) and the valve (20) to be dispensed to the outside atmosphere through the dispensing orifice (23). When the squeezing or compressive force is removed, the one or more elastically deformable side walls (3) are released, allowing air to vent from the outside atmosphere into the space (32), decompressing the compressible material within the space (32) and causing the one or more elastically deformable side walls (3) to return to their original shape. Furthermore, the venting also refills the cavity (32) of the housing (31) with air from the outside atmosphere. The vented air returns into the inverted container (2) through the inlet opening (33a) to replenish the volume of the dispensed liquid.

[0072] With respect to the inverted container 2, the springback of the container 2 after the squeezing force for dispensing is removed provides a pressure differential that draws air through the orifice 30, allowing the container 10 to return to its original shape after squeezing the container 10. Therefore, the container must be sufficiently rigid to draw air through the orifice 30 and provide sufficient springback force to allow the container 10 to return to its original shape. In addition, the container 2 should be sufficiently elastic so that the pressure differential between the contents of the container 2 and the atmosphere due to changes in ambient temperature does not result in leakage of the contents of the container 2. Therefore, the elastically squeezable container 10 may have an elasticity index of less than 2.5%, or between 0.75% and 1.75%, preferably between 0.85% and 1.4%, as measured using the elasticity index method described herein. The desired resilience of the resiliently squeezable container (10) can be achieved using any suitable means, including the selection of materials used to form the container (10), limiting wall thickness by using less resin material to make the container (10).

[0073] Liquid detergent composition The composition used in the present invention is 0.1s -1 ~100s -1 The viscosity of the bottom dispensing container (1) may be Newtonian or non-Newtonian, preferably Newtonian, within the range of shear rates used. The bottom dispensing container (1) is leak-resistant, so that the bottom dispensing container (1) can be measured at a viscosity of 10 s according to the viscosity test method described herein. -1 The dispensers are particularly suitable for containing liquid compositions, particularly liquid detergent compositions, having a viscosity of 50 mPa·s to 3,000 mPa·s, preferably 100 mPa·s to 2,000 mPa·s, and most preferably 300 mPa·s to 1,200 mPa·s, measured at a shear rate of 100°C. Viscosity is measured at 20°C using a Brookfield RT viscometer with spindle 31 and the viscometer RPM adjusted to achieve 40% to 60% torque. The dispensers described herein, and containers containing them, are particularly effective in reducing leakage of such low-viscosity liquids.

[0074] The composition preferably has a density of 0.5 g / mL to 2 g / mL, more preferably 0.8 g / mL to 1.5 g / mL, and most preferably 1 g / mL to 1.2 g / mL.

[0075] The surfactant system preferably comprises an anionic surfactant and a co-surfactant. The co-surfactant may be selected from the group consisting of amphoteric surfactants, zwitterionic surfactants, and mixtures thereof. The surfactant system may comprise the anionic surfactant and the co-surfactant in a weight ratio of 8:1 to 1:1, preferably 4:1 to 2:1, and more preferably 3.5:1 to 2.5:1. Such liquid detergent compositions are particularly suitable for use in hand dishwashing applications.

[0076] The composition may comprise from 1.0% to 60%, preferably from 5.0% to 50%, more preferably from 8.0% to 45%, and most preferably from 15% to 40% of the surfactant system by weight of the total composition.

[0077] The surfactant system may comprise 40% to 90%, preferably 65% ​​to 85%, and more preferably 70% to 80% by weight of the surfactant system of anionic surfactant. The anionic surfactant is preferably selected from sulfate, sulfonate, and sulfosuccinate anionic surfactants, and mixtures thereof. Alkyl sulfate anionic surfactants are particularly preferred, either as the sole anionic surfactant or in combination with sulfonate anionic surfactants such as alkylbenzene sulfonates. Suitable alkyl sulfated anionic surfactants may be alkoxylated or non-alkoxylated. When alkoxylated, the alkyl sulfate anionic surfactant is preferably ethoxylated. When ethoxylated, the alkyl sulfate anionic surfactant is preferably ethoxylated to a molar average degree of ethoxylation of 2.0 or less, preferably 1.0 or less, and more preferably 0.5 to 1.0.

[0078] When the alkyl ethoxylated sulfate anionic surfactant is a mixture, the average degree of alkoxylation is the molar average degree of alkoxylation of all components of the mixture (i.e., the molar average degree of alkoxylation). The calculation of the molar average degree of alkoxylation should also include the weight of sulfate anionic surfactant components that do not have alkoxylate groups. Molar average degree of alkoxylation = (x1 × degree of alkoxylation of surfactant 1 + x2 × degree of alkoxylation of surfactant 2 + ....) / (x1 + x2 + ....) where x1, x2, ... are the number of moles of each sulfate anionic surfactant in the mixture, and the degree of alkoxylation is the number of alkoxy groups in each sulfate anionic surfactant.

[0079] The alkyl sulfate anionic surfactant preferably has a weight average degree of branching of 5% to 60%, preferably 10% to 50%, more preferably 20% to 40%. This level of branching contributes to better dissolution and suds duration, and stability of the detergent composition at low temperatures.

[0080] The weight average branching degree is calculated using the following formula: Weight average of branching (%) = [(x1 × weight % of branched alcohol 1 in alcohol 1 + x2 × weight % of branched alcohol 2 in alcohol 2 + ....) / (x1 + x2 + ....)] × 100 where x1 and x2 are the weights (grams) of each alcohol in the total alcohol mixture used as starting materials for the anionic surfactant. The weight average branching degree calculation should also include the weight of the anionic surfactant component that does not have branching groups.

[0081] The alkyl sulfate anionic surfactant may have an average alkyl chain length of 8-16, preferably 12-15, and more preferably 12-14.

[0082] Suitable commercially available sulfates include Neodol alcohols from Shell, Lial-Isalchem ​​and Safol® from Sasol, and natural alcohol-based surfactants from Procter & Gamble Chemicals. Suitable sulfonate surfactants for use herein include water-soluble salts of C8-C18 alkyl or hydroxyalkyl sulfonates, C11-C18 alkyl benzene sulfonates (LAS), modified alkyl benzene sulfonates (MLAS), methyl ester sulfonates (MES), and alpha-olefin sulfonates (AOS). These also include paraffin sulfonates, which may be monosulfonates and / or disulfonates obtained by sulfonating paraffins of 10-20 carbon atoms. Sulfonate surfactants may also include alkyl glyceryl sulfonate surfactants.

[0083] The composition may further comprise, as part of the surfactant system, a co-surfactant selected from the group consisting of amphoteric surfactants, zwitterionic surfactants, and mixtures thereof. The composition preferably comprises from 0.1% to 20%, more preferably from 0.5% to 15%, especially from 2% to 10% of a co-surfactant by weight of the cleaning composition.

[0084] The surfactant system of the cleaning composition used in the present invention preferably comprises from 10% to 40%, preferably from 15% to 35%, more preferably from 20% to 30% by weight of the surfactant system of a co-surfactant. The surfactant system preferably comprises anionic surfactant and co-surfactant in a weight ratio of from 8:1 to 1:1, preferably from 4:1 to 2:1, more preferably from 3.5:1 to 2.5:1.

[0085] The co-surfactant is preferably an amphoteric surfactant, more preferably an amine oxide surfactant. The amine oxide surfactant may be selected from the group consisting of alkyl dimethyl amine oxide, alkyl amidopropyl dimethyl amine oxide, and mixtures thereof. Alkyl dimethyl amine oxides such as C8-18 alkyl dimethyl amine oxide or C10-16 alkyl dimethyl amine oxide (e.g., cocodimethyl amine oxide) are preferred. Suitable alkyl dimethyl amine oxides include C10 alkyl dimethyl amine oxide surfactants, C10-12 alkyl dimethyl amine oxide surfactants, C12-C14 alkyl dimethyl amine oxide surfactants, and mixtures thereof. C12-C14 alkyl dimethyl amine oxides are particularly preferred.

[0086] Suitable zwitterionic surfactants include betaine surfactants. Such betaine surfactants include alkyl betaines, alkylamido betaines, amidoazolinium betaines, sulfobetaines (INCI sultaines), and phosphobetaines. The most preferred zwitterionic surfactant is cocoamidopropyl betaine.

[0087] Preferably, the surfactant system may further comprise from 1% to 25%, preferably from 1.25% to 20%, more preferably from 1.5% to 15%, and most preferably from 1.5% to 5% by weight of the surfactant system of an alkoxylated nonionic surfactant.

[0088] Preferably, the alkoxylated nonionic surfactant is a linear or branched primary or secondary alkyl alkoxylated nonionic surfactant, preferably an alkyl ethoxylated nonionic surfactant, preferably containing an average of 9 to 15, preferably 10 to 14 carbon atoms in the alkyl chain and an average of 5 to 12, preferably 6 to 10, most preferably 7 to 8, units of ethylene oxide per mole of alcohol.

[0089] Alternatively, or in addition, the composition may include an alkyl polyglucoside ("APG") surfactant, which may improve lather over comparable nonionic surfactants such as alkyl ethoxylated surfactants. When present, the alkyl polyglucoside may be present in the surfactant system at a concentration of 0.5% to 20%, preferably 0.75% to 15%, more preferably 1% to 10%, and most preferably 1% to 5%, by weight of the surfactant composition.

[0090] The liquid detergent compositions used in the present invention may contain a variety of performance additives such as cleaning polymers, polyamines, salts, hydrotropes, organic solvents, and mixtures thereof.

[0091] Suitable cleaning polymers include soil release polymers such as amphiphilic polymers, especially amphiphilic alkoxylated polymers. Suitable polyamines include cyclic polyamines such as those selected from the group consisting of 2-methylcyclohexane-1,3-diamine, 4-methylcyclohexane-1,3-diamine, and mixtures thereof.

[0092] The cleaning composition may have a pH of 5 to 12, more preferably 7.5 to 10, measured at 20° C. at a 10% dilution with distilled water. The pH of the composition may be adjusted using pH adjusting ingredients known in the art.

[0093] Suitable cleaning compositions are described in European Patent Application No. 3511402.

[0094] Test Method In order that the invention described and claimed herein may be more fully understood, the assays described below should be used.

[0095] Leakage under impact The purpose of this test is to evaluate the ability of a liquid dispenser to prevent leakage of liquid from an inverted container during an "impact." The impact occurs when the inverted container is dropped, liquid dispenser-side down, from a specific height onto a flat surface. The drop is intended to simulate the temporary increase in liquid pressure that occurs with an impact in an inverted container. The leak-resistant ability of the liquid dispenser is evaluated by measuring the drop height to which the volume / weight of liquid does not leak during the drop. A higher leak-free drop height correlates to a better leak-resistant ability of the liquid dispenser. The steps of the method are as follows: 1. A drop test apparatus is used, as shown in Figure 13. The apparatus consists of two top and bottom open-ended cylindrical tubes with a diameter of approximately 12 cm; i.e., the outer tube tightly surrounds an inner tube that can be moved vertically into the outer tube, and the outer tube has a cutout section that allows visual assessment of the relative height of the inner tube within the outer tube using a rating scale applied to the outer tube. A removable lever is applied to the bottom of the inner tube, and an inverted container (2) is placed on the lever within the inner tube with its opening facing downward. When the lever is manually removed, the inverted container falls, and the amount of leaked liquid after exposure is weighed. To do this, a piece of paper is placed on the hard surface at the bottom of the open-ended outer container to capture the leaked liquid. The weight of the paper is measured on the scale before and after the drop test to determine the amount of leaked liquid. The height to which the lever was positioned before manual removal is measured as the drop height. 2. An inverted container (2) having a defined volume (e.g., 400 mL or 650 mL) is filled with a standard liquid dishwashing detergent having a density of 1.03 g / mL and a Newtonian viscosity of 1000 cps at 20°C, as measured with a Brookfield Type DV-II equipped with a spindle 31 rotating at 12 RPM, to a defined fill level within the inverted container. For example, a 400 mL inverted container is filled with 400 mL of liquid dishwashing detergent, and a 650 mL inverted container is filled with 650 mL of liquid dishwashing detergent. The liquid fill level, the volume of the inverted container, and the liquid composition are kept constant when comparing different closed systems. 3. Assemble a liquid dispenser with a valve (Simplicity 21-200 "Simplisqueeze®" valve available from Aptar Group, Inc.) with an inverted container (2) as shown in Figures 4-6. The liquid dispenser has a frusto-conical exterior (e.g., 65 mm bottom diameter, 34 mm top diameter, and 30 mm height) for resting on a flat surface, and is optionally equipped with internally deployed baffles (e.g., 7 mm diameter, five ribs extending outward from a 4 mm central ball), an anti-shock system (30) according to the present invention, or both. 4. Set the drop height of the drop tester (2cm to 15cm). 5. Cut a piece of paper approximately 7cm x 7cm to fit the opening at the bottom of the outer tube. 6. Weigh the paper strip using a Mettler Toledo PR1203 balance and record the weight. 7. Place the piece of paper under the opening at the bottom of the outer tube. 8. Place the assembled liquid dispenser and inverted container (2) liquid dispenser side down into the inner tube of the drop tester. 9. With a quick, smooth movement, pull back the lever inside the drop tester. 10. Remove the tube and assembled liquid dispenser and inverted container from the drop tester. 11. Weigh the paper strip again and record the weight. Calculate the difference in weight of the paper. Delta corresponds to the amount of liquid that leaked from the liquid dispenser. 12. Repeat steps 5-11 four more times for a total of five replicates for each test condition. 13. Calculate the average maximum drop height without leakage of the liquid.

[0096] Immersion volume, overflow volume and elasticity index The test is carried out on containers that are at least 3 days old to avoid the effects of shrinkage of the containers after manufacture. The test is carried out at a room temperature of 20°C and a room pressure of 1013±1 Pa.

[0097] Distilled water having a density of 1.000±0.002 g / mL when measured at 20° C. is added to a beaker of at least 5 L volume. If desired, dye can be added to improve visibility, provided the target density is achieved.

[0098] The container is weighed using a laboratory balance with an accuracy of 0.001 g.

[0099] The container is then completely immersed in the beaker with the opening facing upwards, and 20°C distilled water is poured into the beaker, followed by gentle shaking to expel any remaining air from the container. Holding the container by the hardest part of the neck, the container is carefully lifted out of the beaker, avoiding squeezing the container and allowing any solution to leak out. The filled container is wiped dry and reweighed on a balance to determine the weight of the solution contained in the container when it was immersed. From the weight of the distilled water, the immersion volume (mL) can be deduced. The container is then refilled to the brim with additional 20°C distilled water, and the container is reweighed to determine the weight of the distilled water contained in the container after refilling to the brim. From the weight of this surfactant solution, the overflow volume can be deduced. The overflow volume is the total volume of distilled water contained in the container after refilling. The time between immersion in the water bath and weighing should be less than 2 minutes.

[0100] The elasticity index is calculated using the following formula and is expressed as a percentage:

[0101]

number

[0102] Peak Pressure The peak pressure is the pressure in the empty container at a defined temperature above the filling temperature. A temperature and pressure probe (preferably an MSR145B4 data logger) is placed in the empty container, the container is sealingly capped with a mating cap (without an orifice), and the container is maintained at a temperature of 20°C and an atmospheric pressure of 1013±1 Pa, while ensuring that no additional pressure above ambient atmospheric pressure is exerted on the container during capping. The container is placed in a constant temperature oven and set to the desired temperature at 1013±1 Pa for 4 hours, and the maximum (peak) pressure logged by the temperature and pressure probe is recorded. The method is repeated using five different containers, and the average peak pressure is recorded.

[0103] Leaks due to pressure changes The container was filled to 10% of the container size (recommended fill volume) with Fairy® original dark green dishwashing product having a viscosity in the range of 1,000±200 mPa·s at 20°C and left for 10 seconds. -1 The shear rate is measured at 1000 kJ / min (e.g., Belgian Market Products, 2018), and the container is sealed with a cap equipped with a V21-145 slit valve (supplied by Aptar). After weighing the cup, the container is placed upside down in the cup, and the cap of the container is positioned at a distance from the bottom of the cup. The container is then placed in a constant temperature oven at 40°C. After 1 hour, the container and cup are removed from the oven, the container is removed from the cup, and the cup is reweighed to determine the weight of the product that has leaked from the container.

[0104] Minimum Dosage The controlled dosing method provides a way to determine the ease of dosing small amounts. The test preferably uses a commercially available "Joy®" dishwashing container, 330 mL, released in Japan in October 2023. However, since the method provides a comparative dosing assessment for different dispensers being compared, an alternative container with a similar cylindrical volume can be used. Improved dosing is indicated by a reduction in the minimum dose delivered during the test.

[0105] The container contains 0.1s of detergent, such as "Joy®" dishwashing detergent, which was sold by Procter & Gamble in Japan in October 2023. -1 ~100s -1 The bottle is then filled with 210 g of a liquid composition having an intrinsic Newtonian viscosity of 160 MPa.s at a shear rate range of 100 psi. The bottle is then squeezed and held in place while the dispenser is attached to the container, after which the assembled bottle is inverted and the squeezing pressure is released. The container is allowed to recover its shape by drawing air through the dispenser orifice and left for 5 minutes to ensure equilibration.

[0106] Place the container on a microbalance (accurate to at least 0.01 g) and position the bottle above the container at a height of approximately 80 mm. Then, slowly squeeze the container to dispense the smallest possible dose and weigh the dose using the microbalance.

[0107] The test is repeated five times and the dose values ​​are averaged over the five trials. [Example]

[0108] 12 were fabricated by 3D printing for comparative testing, with the inlet opening height (H), overlap distance (O), and ratio of overlap distance (O) to inlet opening height (H) listed in Table 1. The resulting minimum achievable dose from the dispenser is also listed in Table 1.

[0109] [Table 1] * For comparison

[0110] As can be seen from the above data, the minimum dose obtainable from the dispenser decreases as the ratio of overlap distance (O) to inlet opening height (H) increases, demonstrating the improved dosing control of the dispenser of the present invention.

[0111] All parts and ratios herein are calculated by weight unless otherwise specified. All parts and ratios are calculated based on the total composition unless otherwise specified.

[0112] It should be understood that every maximum numerical limitation given throughout this specification includes every lower numerical limitation, as if such lower numerical limitations were expressly written herein. Every minimum numerical limitation given throughout this specification includes every higher numerical limitation, as if such higher numerical limitations were expressly written herein. Every numerical range given throughout this specification includes every narrower numerical range that falls within such broader numerical range, as if such narrower numerical ranges were expressly written herein.

[0113] Dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as "40 mm" is intended to mean "about 40 mm."

Claims

1. A liquid dispenser (1) for attachment to an inverted container (2) containing a dispensable liquid, said dispenser (1) comprising: a) a body (10) of the dispenser (1) comprising a connecting sleeve (11) adaptable to engage an outer surface adjacent the opening (5) of the inverting container (2) and defining, spaced radially inward, an internal discharge conduit (12) for establishing fluid communication with the liquid contained in the inverting container (2); b) a valve (20) located within the body (10) extending across the internal discharge conduit (12), the valve (20) having an inside (21) in contact with the liquid contained within the inverted vessel (2) and an outside (22) exposed to the external atmosphere, the valve (20) defining a dispensing orifice (23) responsively openable when the pressure within the inside (21) of the valve exceeds the pressure within the outside (22) of the valve; c) an anti-shock system (30) located upstream of the valve (20), the anti-shock system (30) comprising a housing (31) having an internal cavity (32) and extending longitudinally from the body (10) and radially inward from the sleeve (11); the housing (31) comprises at least one inlet opening (33a) providing a flow path for the liquid from the inverted container (2) into the housing (31) and at least one outlet opening (33b) providing an exit path for the liquid from the housing (31) to the outside atmosphere when the dispensing orifice (23) is opened, the cavity (32) is adapted to be partially occupied by a compressible material, the at least one inlet opening (33a) comprising a lower edge (38) proximal to the body (10) and an upper edge (39) distal to the body (10) such that the at least one inlet opening (33a) has an inlet opening height (H); The shock resistant system (30) further comprises a wall (60) disposed radially inward from the housing (31), extending longitudinally from the body (10) and surrounding the valve inner side (21); the wall (60) extends longitudinally from the body (10) an overlap distance (O) beyond the lower edge (38) of the at least one inlet opening (33a); A liquid dispenser (1) characterized in that the ratio of the overlap distance (O) to the inlet opening height (H) is 1.25 or greater.

2. The housing (31) is 200 mm ３ A liquid dispenser (1) according to claim 1, having an internal volume of up to 250,000 mm3.

3. The inlet opening (33a) is 1 mm ２ A liquid dispenser (1) according to claim 1 or 2, having a total surface area of ​​up to 250 mm2.

4. The liquid dispenser (1) according to claim 1, wherein the inlet opening (33a) has a height (H) of between 0.5 mm and 7.5 mm.

5. The liquid dispenser (1) according to claim 1, wherein the ratio of the overlap distance (O) to the inlet opening height (H) is between 1.25 and 10.

6. 2. The liquid dispenser (1) of claim 1, wherein the main body (10) or the housing (31) comprises an upper retaining surface (29a), and the lower edge (38) of the at least one inlet opening (33a) is positioned at a distance of less than 5.0 mm from the upper retaining surface (29a) in the longitudinal direction.

7. 2. The liquid dispenser (1) of claim 1, wherein the body (10) or the housing (31) comprises an upper retaining surface (29a), and the wall (60) extends longitudinally from the upper retaining surface (29a) by a distance of 4.5 mm to 30 mm.

8. The liquid dispenser (1) according to claim 1, wherein the housing (31) comprises a plastic material.

9. 2. A liquid dispenser (1) according to claim 1, wherein the internal resistance of the valve (20) for opening the dispensing orifice (23) is at least 10 mbar.

10. 10. The liquid dispenser (1) according to claim 9, wherein the internal resistance of the valve (20) is less than 250 mbar.

11. 2. The liquid dispenser (1) of claim 1, wherein the valve (20) comprises a flexible central portion (24) having at least two slits (25) extending radially outward to a distal end (26), the slits (25) intersecting to define the dispensing orifice (23).

12. 2. The liquid dispenser (1) according to claim 1, wherein the body (10) comprises, at its bottom end (B), an outer portion (14) adapted to rest the inverted container (2) upside down on a flat surface.

13. 2. The liquid dispenser (1) of claim 1, further comprising a baffle (40) located between the inner side (21) of the valve (20) and the anti-shock system (30).

14. An inverted container (2) comprising a liquid dispenser (1) according to claim 1, wherein the liquid dispenser (1) does not comprise a closure cap or seal.

15. 15. The inverted container (2) of claim 14, wherein the inverted container (2) contains a liquid detergent composition.

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