Abstract: An aerosol dispenser, outer container for an aerosol dispenser and a preform for an outer container, each include an open neck at the top and a closed end bottom. The open neck may include a first surface having a first surface diameter, a second surface disposed interior to the first surface and having a second surface diameter less than the first surface diameter, and a transition distinguishing the first surface from the second surface. For a dispenser and a container, a product delivery device may be disposed on the second surface and not interfere with a valve operable by a user when the valve is attached to the open neck in engagement with the first surface. At least one of the first and the second surfaces may be a sealing surface to prevent escape of propellant from the outer container to ambient when a valve is attached.

Abstract: A preform suitable for blow molding into for an outer container usable for a pressurized aerosol dispenser. The preform has a longitudinal axis and a closed end bottom, an open neck. The neck has threads for accepting a valve having complementary threads. At least one pawl or ratchet is operatively juxtaposed with the periphery of the preform. The at least one pawl or ratchet allows onward rotation of the complementary valve in an onward direction, and prevents detachment of the valve in a reverse rotation direction. Any such preform can be blow molded into a corresponding outer container, and any such outer container can be blow molded from a corresponding preform.

Abstract: An aerosol container for an aerosol dispenser. The aerosol container has an outer container. The outer container has a closed end bottom and a longitudinally opposed threaded open neck. The open neck has one or more pawls or ratchets disposed near the neck. The pawls or ratchets allow a complementary valve to be threaded onto the neck. The valve has complementary ratchets or pawls. The ratchet and pawl combination co-acts to impede or even prevent reverse rotation and subsequent removal of the valve. The outer container may be made from a preform having the ratchets and/or pawls integrally molded as part of the injection molding process. A valve having a housing may have ratchets and or pawls integrally molded as part of the injection molding process.

Abstract: A valve assembly for a dispenser. The valve assembly includes a valve body that extends about a longitudinal axis and defines an outer surface and an inner passageway. A valve stem extends through the inner passageway and includes an outer stem surface, an inner stem surface opposite the outer stem surface, a fin extending radially outward from the outer stem surface, and a first orifice extending from the outer stem surface to the inner stem surface. The fin operatively engages a portion of the inner passageway forming a first seal and providing controlled dispensing through the orifice. A valve seal may be joined to the valve steam. The vale seal may operatively engage a portion of the valve body forming a second seal.

Abstract: A valve assembly for a dispenser. The valve assembly includes a valve body that extends about a longitudinal axis and defines an outer surface and an inner passageway. A valve stem extends through the inner passageway and includes an outer stem surface, an inner stem surface opposite the outer stem surface, a fin extending radially outward from the outer stem surface, and a first orifice extending from the outer stem surface to the inner stem surface. The fin operatively engages a portion of the inner passageway forming a seal therebetween and providing controlled dispensing through the orifice.

Abstract: The present invention relates to a composition comprising: a) at least one sebum-absorbing powder with a sebum uptake of greater than or equal to 35 ml/100 g, and/or at least one styling powder; b) at least one zinc salt other than the sebum-absorbing powders with a sebum uptake of greater than or equal to 35 ml/100 g, and/or than the styling powders; c) optionally a propellant. A subject of the present invention is also to a process for the thy-washing and cosmetic treatment of keratin materials, comprising a step of applying the composition to the hair.

Abstract: An aerosol dispenser, outer container for an aerosol dispenser and a preform for an outer container, each include an open neck at the top and a closed end bottom. The open neck may include a first surface having a first surface diameter, a second surface disposed interior to the first surface and having a second surface diameter less than the first surface diameter, and a transition distinguishing the first surface from the second surface. For a dispenser and a container, a product delivery device may be disposed on the second surface and not interfere with a valve operable by a user when the valve is attached to the open neck in engagement with the first surface. At least one of the first and the second surfaces may be a sealing surface to prevent escape of propellant from the outer container to ambient when a valve is attached.

Abstract: A valve for an aerosol dispenser. The valve has a housing as a chassis for other components of the valve. The housing perimetrically joins the valve to an outer container for the aerosol dispenser. The housing has a hole with a moving valve stem to selectively dispense product, upon actuation. The housing, or portions thereof, may be crystallized, to provide strength and dimensional stability, to reduce leakage.

Abstract: An aerosol valve having a cap with integral tube passing into a lid of an aerosol can. The bottom of the lid has a valve body containing a gate and a spring. The interior of the valve body has tapered grooves that are narrower on an upper end to control the flow. The spring biases the face of the edge against the washer to close the valve. When the cap is pressed the tube presses the top of the gate to separate the edge and the washer thereby opening the valve and causing the contents of the aerosol can to be dispensed.

Abstract: A metering valve for dispensing fluid, the metering valve comprising: a valve body (10) containing a metering chamber (20); and a valve member (30) that slides axially in said valve body (10) between a rest position and a dispensing position, for selectively dispensing the contents of said metering chamber (20); said valve member (30) including a collar (320) and being urged towards its rest position by a spring (8) that co-operates firstly with said valve body (10) and secondly with said valve member (30), said valve body (10) including a valve-body cylindrical portion (15) in which said collar (320) of said valve member (30) slides between its rest and dispensing positions, said valve-body cylindrical portion (15) including a plurality of longitudinal splines (100) that extend over at least a fraction of the height of said valve-body cylindrical portion (15), said longitudinal splines (100) projecting radially inwards and acting on said collar (320) of said valve member (30) for substantially centering said

Abstract: The present device dispenses product from a pressurized container. The device has a metered valve that dispenses a predetermined fixed quantity of product upon actuation. The metered valve can be configured by the customer with a spacer to affect the amount of product continually metered.

Abstract: A valve assembly (10) for dispensing a flowable product from a pressurised container (200), the valve assembly comprises a resilient sleeve member (16) comprising a lower fixing portion (18), an intermediate deformable portion (20) and an upper sealing portion (22), a valve stem (28) extending within the resilient sleeve member (16) and fixed to the lower fixing portion (18) of the resilient sleeve member (16), and an actuator (46) mounted on the upper sealing portion (22) of the resilient sleeve member (16). The valve stem (28) includes a hollow cylindrical body (38), an end cap (32) closing an upper end of the hollow cylindrical body (38), and one or more apertures (34) arranged around the circumference of the hollow cylindrical body (38) adjacent to the end cap (32). The apertures (34) are covered by the upper sealing portion (22) of the resilient sleeve member (16) in a closed position of the valve assembly (10).

Abstract: Container, including a body delimiting a cavity to contain fluid substance. A mobile bottom, inside the cavity, sealedly movable along the body internal wall. The body sealedly coupled to a collar having a surface resting on the body and a tubular member extending from the bottom thereof. The tubular member defining a first passage through which the fluid substance flows in use. An insert housed within the collar and formed of first and second parts, connected by a first breakable portion. A shutter housed, in a sealed manner, inside the insert and formed of first and second sections mutually connected by a second breakable portion. The second section including a surface to cooperate, in a sealed manner, with the tubular member when the second section is fitted thereon and a breakable wall which, when broken, permits access to the cavity.

Abstract: A treatment head for cleaning a container that has a valve arrangement that includes a tappet that is configured to move relative to the treatment head's housing to open the valve arrangement and fluid channels leading into the container. A first channel of the fluid channels has an annular fluid channel section and surrounds the second channel. A flow twister is disposed in either the first channel or in a line connected to the first fluid-channel.

Abstract: An aerosol container includes a single piece or a two-piece mounting cup that is concave and, preferably, enables stacking and is lightweight.

Abstract: An aerosol dispenser, outer container for an aerosol dispenser and a preform for an outer container, each having an open neck at the top and a closed end bottom longitudinally spaced therefrom. The aerosol dispenser has, in order, from the top of the neck, a valve attachment, an annular first surface and an annular second surface, each having a respective diameter. The diameter of the valve attachment is greater than the diameter of the first surface, which, in turn, is greater than the diameter of the second surface. This geometry allows any complimentary product delivery to be disposed on the second surface. Any suitable and complimentary valve may be attached to the valve attachment and sealed to the first surface. This arrangement provides flexibility and the capability to easily mix and match any desired combination of fittingly suitable outer containers, product delivery devices and valves. Suitable product delivery devices include bags, and dip tubes.

Abstract: An aerosol dispenser assembly is disclosed that includes a container holding a liquid product and a compressed gas propellant for propelling the liquid product from the container. A design methodology for the actuator body and swirl nozzle insert is disclosed for maintaining a small particle size or Sauter Mean Diameter (D[3, 2]) of less than 48 ?m at a suitable spray rate (1.5-2 g/s), while utilizing a compressed gas VOC-free propellant for an air freshener product. As obtaining reduced particle size to compete with LPG propellants may result in a reduced spray rate, it is anticipated that one or more nozzles may be designed into the actuator body to maintain a suitable spray rate.

Abstract: A fluid dispenser valve including a valve body extending along a longitudinal axis between a first axial end and a second axial end, the valve body containing a metering chamber; and a valve member that slides axially in the valve body between a rest position and a dispensing position, for selectively dispensing the contents of the metering chamber. The metering chamber is connected, in the valve member rest position, to a fluid reservoir, to fill the metering chamber by gravity when the valve is upsidedown with the metering chamber below the reservoir while the valve member is in the rest position, and to empty the metering chamber by gravity when the valve is upright. The valve body includes a first hole and a second hole, to fill and to empty the metering chamber, the first hole being axially offset along the longitudinal axis relative to the at second hole.

Abstract: A pressurized refill canister containing a reservoir of composition including a propellant, and a non-metered refill outlet valve comprising a stem displaceable from a first position to a dispensing position against the action of a resilient member. The stem comprises a blind bore open at an outlet end and closed at the opposite end and a lateral bore in the side wall of the stem leading to the blind bore. The refill outlet valve further comprises an annular seal which surrounds the stem whereby, in the first position, the lateral bore is not in communication with the inside of the canister, and in the dispensing position, the lateral bore is arranged to move inside the canister with respect to the seal to open a flow path from the inside of the canister via the lateral bore and along the blind bore to the outlet end.

Abstract: A nozzle hole mechanism (10) is provided with a nozzle hole (28) which ejects a concentrate into the atmosphere, a swirl chamber (30) which supplies the concentrate to the nozzle hole (28), and a path (27) which supplies the concentrate to the swirl chamber (30). The diameter of the nozzle hole (28) is 0.2 mm or less, the length of the nozzle hole (28) is in the range of 0.05-0.3 mm, and the swirl chamber (30) and the nozzle hole (28) are located on the same axis. The swirl chamber (3) is equipped with a front section having a solid cylindrical shape, which communicates with the nozzle hole, and a rear section having an ring shape. The nozzle hole mechanism is configured in such a manner that the concentrate is supplied to the rear section (30a) and discharged from the nozzle hole (28) via the front section (30b). The configuration enables the nozzle mechanism to spray fine particles over a wide area using small spray amount.

Abstract: A valve assembly in which contents respectively packed in multiple storage parts which cannot be reacted with each other in the middle of passage, an aerosol container equipped with the valve assembly, and an aerosol products are provided. An aerosol container comprises an outer container, two inner bags inserted into the outer container, and valve assembly which closes inner bags and outer container. The valve assembly comprises aerosol valves which are separated independently from each other and a holding member for holding the aerosol valves and for fixing the aerosol valves to the outer container.

Abstract: A metering valve for an aerosol receptacle, is provided with a valve body having an internal chamber (17) for contact either with the internal face of the valve or with the external face of the valve, a stem (41) provided with closure means (42) and placed partly inside the internal chamber (17) for moving between a closed position in which the internal chamber contacts the internal face of the valve, but isolated from its external face, and an open position in which the internal chamber contacts its external face but isolated from its internal face, and a reservoir (R) able to be filled with the stem in the closed position and emptied with the stem in the open position. The reservoir is on the side of the internal face of the valve, outside the valve body, contacting its internal chamber, and formed by at least one flexible membrane (2).

Abstract: The present invention is directed to a metering valve used in both conventional and bag-on-valve aerosol container applications that allows a high flow rate of especially viscous substances. The metering valve according to the present invention including a valve housing, a valve stem, and a spring or other biasing device that allows the valve stem to move relative to the valve housing. The valve stem serves as a metering chamber with a metering device in the form of a ball or disk without other mechanisms such as springs or mechanical parts within the valve stem. Radial bores and a seal near the bottom of the valve stem provide for dispensing of pre-determined quantities of product from an aerosol container pressurized with liquefied propellants or compressed gas. The bore shape and size can be selected to facilitate a high volume flow rate for highly viscous substances.

Abstract: An apparatus for delivering liquid includes a wand with a nozzle, a toggle switch, and a supply canister for delivering self-tanning and sun-tanning solutions to a human body. The wand may pivotably attach to a cap attached to the supply canister containing the chosen liquid to be delivered without the necessity of an exposed external tube suspended between the wand and the supply canister.

Abstract: A discharge device for discharging pharmaceutical liquids, with a housing, a liquid reservoir with a receiving space for storing the pharmaceutical liquid, and a discharge opening which is provided on the housing and which connects the receiving space to an environment and serves to dispense the pharmaceutical liquid. A pretensioned spring mechanism is provided, by means of which liquid in the receiving space of the liquid reservoir is subjected to pressure and which, in the assembled state of the discharge device, is not accessible for input of energy.

Abstract: The present invention is a valve for a container. The valve includes a grommet defining a channel with an inlet end and an outlet end. The valve has a stem, slideably arranged in the channel, and the grommet includes a first part provided at the inlet end and a second part provided at the outlet end. The first part has a hardness greater than the hardness of the second part.

Abstract: A discharge assembly apparatus for discharging a metered volume of a liquid when used in combination with a liquid-containing, pressurized or pressurizable container includes an actuator assembly incorporating a valve stem having a discharge conduit arrangement with an inlet and an outlet, a metering chamber formed within the valve stem and incorporating a liquid discharge element, an inlet/outlet arrangement, and a housing wherein the valve stem and the inner surface of the housing define a fluid transfer passageway therebetween, the discharge conduit arrangement of the valve stem providing communication between the outlet of the metering chamber and the outlet of the valve stem via the fluid transfer passageway.

Abstract: A discharge assembly for discharging a metered volume of a liquid held in a pressured container includes an elongate tubular housing, a valve stem having a body locating within the housing, a chamber provided within the body of the valve stem and having a liquid inlet, and a liquid discharge element moveable along the chamber from a liquid primed position to a liquid discharged position to effect discharge of the metered volume of liquid, wherein a second fluid transfer passageway is formed along the outside of the valve stem between the inlet of the housing and the first fluid transfer passageway, and a seal is provided for relative sliding movement onto a seat as the valve stem moves to close the second fluid transfer passageway to fluid flow.

Abstract: An aerosol metering valve comprising: (a) a valve stem movable between a rest position and a firing position comprising: a body portion comprising a circumferential sealing surface (b) a valve body comprising: a body wall, and an internal chamber defined at least in part by the body wall; and (c) a metering gasket having an inner periphery defining an aperture, being disposed near the most interior end of the internal chamber and being configured to be able to form a transient, substantially fluid-tight face seal against the circumferential sealing surface of the valve stem, where at the rest position of the valve stem, the body portion of the valve stem is located within the internal chamber and as the valve stem is moved from its rest position towards its firing position the circumferential sealing surface of the valve stem contacts the metering gasket to form a face seal thereby closing a metering chamber and thereafter further movement of the valve stem towards its firing position causes the metering gask

Abstract: A metering valve having a contiguous double wall structure including an inner wall defining the metering chamber and an outer wall which defines a crimping and support wall against which the inner rim of the mounting cup of the container can be crimped. The outer wall may be maintained at the same diameter and thickness for use with generally any mounting cup which are approximately an inch in diameter as well as any mounting process and machinery. The inner wall may however be sized differently in order to accommodate different dosages for metering of product. A radial space between the inner and outer wall permits the both the axial elongation of the metering chamber as well as a radial expansion of the inner wall and hence the valve chamber relative to the outer wall due to the space between the inner and outer wall.

Abstract: The invention comprises a device for delivering an aerosol comprising a diaphragm comprising a first layer with a compression set of 30% or more and a second layer with a compression set of 20% or less. The invention also comprises a device for delivering an aerosol comprising a diaphragm comprising a first layer comprised of an uncrosslinked thermoplastic elastomer and a second layer comprised of a crosslinked rubber.

Abstract: A valve for an aerosol device includes a valve assembly receivable in an opening provided in a container of the aerosol device to close the opening and includes a seal between the valve assembly and the container.

Abstract: The invention relates to a valve for a container for dispensing pressurized fluid, the valve having a valve body which is mountable on a container lid, a closure member which is arranged in a passage provided in the valve body, a sealing arranged on the closure member and formed of at least one disc-shaped sealing lip and which, when the closure member is in a closing position relative to the valve body, abuts on a valve seat provided on the passage, and a holding device by which the closure member is displaceably arranged in the valve body and held in a closing position therein when it is in its normal position, at least one wear protection device being associated with the at least one sealing lip upstream with respect to the outflow direction of the fluid.

Abstract: A fluid dispenser valve for mounting on a neck (2) of a receptacle (1) containing the fluid, said valve comprising a valve body (10) including a metering chamber (15) and a valve member (20) movable in said metering chamber (15) between a rest position and a dispensing position, said metering chamber (15) having a top gasket (30) and a bottom gasket (40) co-operating in leaktight manner with said valve member (20), said valve including a neck gasket (50) co-operating in leaktight manner with said valve body (10) and with said receptacle neck (2), said neck gasket (50) being made integrally as a single piece with one of said top and bottom gaskets (30, 40) of the metering chamber (15).

Abstract: A ring for disposing around a valve body of an aerosol dispenser valve that is mounted by a fastener element, such as a crimpable capsule, on a reservoir containing substance to be dispensed, the ring having an outer portion and an inner portion that cooperate with the valve body, and the outer portion having a deformable axial wall portion that extends towards the bottom of the reservoir and that is capable of deforming elastically in a radially-inward direction.

Abstract: A valve for a pressurized dispensing container has a resilient annular grommet that surrounds a valve stem. The grommet has a lower segment which engages an elongate valve stem opening with a slight interference fit to provide user controllable metering of the product being dispensed. A recess in the lower surface of the grommet contains the stem button from the closed state to the fully open state to provide stability for the stem. The upper portion of the grommet has a restoring boot to assure that the valve is returned to its closed state once manual force is removed from the valve. A boot flange and stem recess engagement together with other dimensional relationships assures that the boot provide the required restoring force throughout the dispensing of product.

Abstract: The invention concerns a push-button nozzle for liquid or semi-liquid product dispenser, said dispenser comprising means for delivering the product under pressure which are mounted on the product container bottle and which comprise an ejection tube projecting outside. The invention is characterized in that said nozzle comprises a needle valve tightly closing the spraying orifice provided at the end of said nozzle, means for being fixed on the ejection tube and means for supplying products to a turbulence chamber located proximate said orifice.

Abstract: Valve arrangement for a pressurized fluid container, consisting of a valve disc which may be sealingly connected to the fluid container, a valve body made of plastics which may be secured in an opening of the valve disc, a valve piston made of plastics which is guided in a through-channel of the valve body and cooperates with a sealing surface of the valve body and a spring arrangement cooperating with the valve body, which presses the valve piston against the sealing surface of the valve body, the valve body comprising a neck defining the through-channel and at least one collar segment, an annular groove being formed between the neck and the at least one collar segment, and into the annular groove a press ring being introduced, of which the thickness in the radial direction is such that the at least one collar segment is pressed in a spread-apart manner against the opening of the valve disc.

Abstract: A metering valve (1) is provided for a pressurised container (14) containing a pharmaceutical formulation. The valve has a stem (2) with a central flange (11) and a hollow open end (19) with a side port (20). The stem slides in a body (3) having larger and smaller diameter portions, and being closed off by a seal (4) against which the flange (11) rests in an inoperative position. A second seal is located around the stem on the opposite side of the flange and trapped by a spring (6) which urges the stem into its inoperative position. When the stem is depressed, the inner seal (5) forms a sliding seal with the smaller diameter portion of the body to define a metering chamber (13) filled with the pharmaceutical. Continued depression opens the side hole (20) to allow the contents of the metering chamber to be dispensed.

Abstract: A spray cap, also known as an actuator overcap for an aerosol container, has an acoustic seal between the actuator button and the overcap. This acoustic seal is formed by a set of matching sealing lips on the actuator button and also on the overcap, such that they are both oriented horizontally. At rest, the sealing lip of the actuator button rests above the sealing lip of the overcap, but during actuation, the sealing lip of the actuator button deforms the sealing lip of the overcap, which both forms an acoustic seal during actuation and creates the force to return the sealing lip of the actuator button back to its original position after actuation is complete.

Abstract: An axially actuated valve primarily for use in a pressurized container having a dip tube comprises a vertical moveable valve element having a stem, button on the base of the stem and sidewall openings at the lower part of the stem. A resilient annular sealing grommet has a recess in its base into which the button fits. When the valve is closed, the button engages the ceiling of the recess to block product from reaching the sidewall openings. The button is within the recess at all times between its closed and open states. The button has upper and lower disc portions. The lower disc portion optionally has a tubular tail to engage a dip tube. The upper disc portion has edge recesses that provide communication between the stem wall openings and a zone created when the valve element is depressed. The button has a vertical passageway through the lower disc portion and a horizontal passageway between the two disc portions extending out to the edge recesses in the upper disc portion.

Abstract: Assembly (10) consisting of a dispensing valve (11) for dispensing pressurized fluids, and a pouch (12) of flexible film material in fluid-tight connection therewith, which is placeable in an outer container (15) through an opening (14) therein that is sealable by a cover (13), the dispensing valve (11) having a valve body (18) which is mountable fluid-tightly at the edge (16) of a cover opening (17) formed in the container cover (13), to which valve body (18) an outlet tube (20) extending through a pouch opening (19) is able to make fluid-tight connection. The outlet tube (20) has a disc-shaped, especially cylindrical-cap-shaped, widened portion (21) extending around the pouch opening (19) inside the pouch (12). The pouch (12) is supported against the widened portion (21) of the outlet tube (20), with the intermediate arrangement of an annular disc (22) that bounds the pouch opening (19).

Abstract: Provided is a two-liquid distributing aerosol device separately storing two types of liquids to be separately stored, wherein the two types of liquids are separately distributed in a valve mechanism and mixed for use immediately before distribution or separately distributed for use without mixing. The device having first and second passages, formed separately from each other, each passage having an independent seal.

Abstract: In a valve used for dispensing flowable product from a pressurized container A cup is snapped onto the button at the base of the valve stem so that the upper rim of the cup engages the resilient sealing grommet that surrounds the main portion of the stem. The upper rim of the cup provides a moderately sharp sealing edge so that the pressure against the surface of the resilient grommet is enhanced. This creates a more effective seal than does the relatively broad surface to surface engagement between button and grommet in a standard valve.

Abstract: An axially actuated valve for use in a pressurized container is controlled by a user to dispense the amount of product desired. The valve stem is moved in an up and down direction so that when dispensing, the user can control the amount of the valve openings that are in communication with the material to be dispensed. A resilient sealing grommet provides an interference fit around the lower part of the valve stem from the button up to the top of the valve stem openings. This interference fit effectively closes off the uncovered portion of the valve openings thereby permitting user control of the dispensing rate. The stem has openings partially tapered in the form of an inverted truncated pyramid to further facilitate user control of the dispensing of product.

Abstract: A metering valve (2) and a device (1) provided with it for metered dispensing of a preferably cosmetic liquid (3) and a process for producing such a metering valve and a use of such a metering valve. The metering valve preferably has a sealing element (14) which is injection molded onto the valve element (6) or a valve housing (7) or attached in some other way so that simple and economical production by injection molding is enabled. Optimum sealing is achieved in that the sealing element, at least in sections, is made at least annular or sleeve-shaped, seals radially with the inlet valve closed, and is supported either radially inside or outside.

Abstract: A metering valve (2) and a device (1) provided with it for metered dispensing of a preferably cosmetic liquid (3) and a process for producing such a metering valve (2) and a use of such a metering valve (2) are suggested. The metering valve has a valve element (6) with a spring section (21) which is elastic in the direction of motion and which bears a sealing element (14). This allows especially sealed contact with the assigned valve seat when the inlet valve (9) is closed.

Abstract: A metering valve having a contiguous double wall structure including an inner wall defining the metering chamber and an outer wall which defines a crimping and support wall against which the inner rim of the mounting cup of the container can be crimped. The outer wall may be maintained at the same diameter and thickness for use with generally any mounting cup which are approximately an inch in diameter as well as any mounting process and machinery. The inner wall may however be sized differently in order to accommodate different dosages for metering of product. A radial space between the inner and outer wall permits the both the axial elongation of the metering chamber as well as a radial expansion of the inner wall and hence the valve chamber relative to the outer wall due to the space between the inner and outer wall.

Abstract: A seal for a valve for use in a pharmaceutical dispensing device, which seal is formed from a thermoplastic elastomer including a propylene component with isotactic crystallinity.

Abstract: A valve that includes a valve body, a valve stem having a dispensing passage, and a sealing ring that contacts the valve stem is described. The sealing ring includes a flexible component and a rigid component.