EP2987749A1 - Ventil - Google Patents

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Publication number
EP2987749A1
EP2987749A1 EP14181669.4A EP14181669A EP2987749A1 EP 2987749 A1 EP2987749 A1 EP 2987749A1 EP 14181669 A EP14181669 A EP 14181669A EP 2987749 A1 EP2987749 A1 EP 2987749A1
Authority
EP
European Patent Office
Prior art keywords
valve
grommet
flange
valve stem
cup
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14181669.4A
Other languages
English (en)
French (fr)
Inventor
Jean-Marie Poppe
Tine Festjens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Altachem NV
Original Assignee
Altachem NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Altachem NV filed Critical Altachem NV
Priority to EP14181669.4A priority Critical patent/EP2987749A1/de
Publication of EP2987749A1 publication Critical patent/EP2987749A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/44—Valves specially adapted therefor; Regulating devices
    • B65D83/46—Tilt valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/44—Valves specially adapted therefor; Regulating devices
    • B65D83/48—Lift valves, e.g. operated by push action

Definitions

  • the invention concerns a valve for a fluid dispensing container, comprising
  • valves are known from WO 2012/101061 A1 and are used for dispensing fluids of various natures, among other for dispensing one and two component polyurethane foam.
  • the valve cup has an annular wall terminating in an outer annular channel portion which is crimped in conventional way on the cylindrical wall of the container.
  • valve When the user wishes to dispense the product from the container, the valve can be actuated by tilting or pushing down the valve stem which disrupts the seal at the interface between the valve stem base and the grommet flange to bring the interior of the container in fluid communication with the central bore of the stem a with ambient.
  • valves has been widely adopted, but it is known to have a problem of occasional valve sticking when used to dispense polyurethane foam.
  • Polyurethane foam will cure and harden after having been dispensed from the container.
  • this curing will begin to occur in the can itself and can result in skin formation in the can and a stuck valve such as to render the container useless to the consumer.
  • the major source of moisture occurring in the container is environmental moisture in the air outside the container. This moisture can permeate the inner gasket due to the portion of the grommet extending into the environment outside the container and valve cup. Since a portion of the inner gasket also extends inside the container under the valve cup, the permeated moisture can leave the grommet inside the container to come into contact with the polyurethane product inside the container. Thus, curing and hardening of the polyurethane product may begin inside the container resulting in the stuck valve and the failed product.
  • WO 2009/042206 A1 is concerned with an aerosol valve for dispensing polyurethane foam including a plastic liner shield to prevent environmental moisture permeating through the sealing grommet into the aerosol container to harden product and disable the valve.
  • the liner has an annular upper portion in the valve cup channel for sealing the container bed, an intermediate portion surrounding the grommet in the can and a lower annular flange extending between the valve stem base and lower grommet surface.
  • the liner While environmental moisture may still enter the grommet through its upper portion extending above the valve cup panel, that moisture is prevented from egressing from the grommet line into the product in the aerosol container due to the liner shield.
  • the liner therefore eliminates the problem of valve sticking in a simple manner.
  • the liner as a supplementary part of the valve increases the production costs and the manufacturing difficulty.
  • EP 2 354 037 B1 describes a stem for a valve comprising a hollow stem body having a first open end and a second end closed by a stem base forming a flange, wherein at least the face of the flange adjacent said stem body comprises an additional layer.
  • the additional layer provides a mechanism for preventing the valve stem in a pressurized dispensing container from sticking.
  • the product dispensed such as polyurethane foam, is avoided to stick between the grommet and the valve stem, particularly the stem base. When the product dries or cures, it is prevented from creating a seal or adhesion between the outside of the valve stem and the grommet. Further, the additional layer prevents the foam from hardening against the stem base when moisture enters the container through the grommet which also causes failure of the valve function.
  • the objective of the present invention is to provide a qualitative and reliable solution for preventing environmental moisture from entering into contact with the product in the container.
  • the flange of the stem is designed in order to cover at least partially the grommet. This means that the flange of the stem is designed to form a protection screen between the grommet and the product contained in the container. It may be preferable that the flange of the stem is at least partially or fully in sealing contact with the inner wall of the valve cup, thereby sealing at least partially or fully the grommet from the product in the container.
  • the invention is based on the idea that the grommet (which is generally a rubber part, e.g. of TPU, neoprene, vulcanized rubber, etc.) can be covered with a plastic part, namely the flange of the valve stem, which has a much lower water vapour transmission rate than rubber parts thereby reducing water vapour transition from the grommet to the product contained in the container.
  • the grommet which is generally a rubber part, e.g. of TPU, neoprene, vulcanized rubber, etc.
  • the grommet area in a 2D bottom view should be for at least 65 %, preferably 70 %, more preferably 80 % and most preferably 90 % covered by the flange of the valve stem. In the best case, it is 100 % covered by the flange of the valve stem.
  • the grommet is isolated from the chemicals in the container so that degradation of the grommet due to chemical influences coming from the product in the container is avoided. All these advantages lead to a longer shelf life of the container.
  • the valve cup is designed to present a circular contact surface which extends to the level of the flange of the valve stem and toward which the flange of the valve stem is directed.
  • valve cup has a substantially planar central portion and a peripheral edge suitable for sealingly fixing the cup to the top opening of the container, said valve cup comprising an inner surface and an outer surface, the through opening being surrounded by a first annular fold forming a first groove in its inner surface and a first rib in its outer surface.
  • the through opening is surrounded by a second annular fold with greater diameter than the first annular fold forming a second rib in its inner surface and a second groove in its outer surface.
  • the flange can have a conical form with the free end extending upwards to the level of the valve cup and covering at least partially the grommet.
  • the flange has a disk form with the free ends extending sideward and sealing against the valve cup, in particular against the second rib thereof.
  • the stem is made of a thermoplastic polymer, preferably of polyolefin, most preferably of high density polyethylene (HDPE), each of them with or without filler(s) such as glass fibres or stone fibres, e.g. basalt fibres.
  • a thermoplastic polymer preferably of polyolefin, most preferably of high density polyethylene (HDPE), each of them with or without filler(s) such as glass fibres or stone fibres, e.g. basalt fibres.
  • HDPE high density polyethylene
  • High density polyethylene has the lowest water vapour transmission rate of all plastics.
  • the grommet is produced by an injection over injection moulding process, preferably the grommet being injected over the valve stem.
  • the grommet is preferably injection moulded over the valve cup.
  • a valve (1) for a fluid dispensing container comprises a valve cup (2) to be fixed on a container, a resilient grommet (3) extending on both sides of the valve cup (2) through the opening thereof.
  • a valve stem (4) comprising a hollow tubular portion defining a central bore snugly fits in the central bore of the grommet (3) and extends on both sides thereof. It has a first opening (5) to ambient on the upper side and a second, opposite end which is closed by a circular flange (6) of diameter greater than the diameter of the central bore of the grommet (3).
  • the central bore of the valve stem (4) is in fluid communication with the interface between the valve stem base and the grommet flange via at least one lateral opening (7).
  • the valve stem (4) further comprises a circular sealing lip (8) located near the distal end.
  • the valve cup (2) generally has a first annular fold forming a groove (9) in its inner surface and a rib in its outer surface.
  • the valve cup (2) has a second annular fold with greater diameter than the first annular fold forming a rib (10) in its inner surface and a groove in its outer surface.
  • valve stem (4) is inserted into the central bore of the grommet (3) whereby the grommet (3) is clamped between circular sealing lip (8) at the outlet end of the stem (4) and the stem base forming a flange (6) at the inlet end of the stem (4).
  • the stem (4) is hereby in sealing contact with the inner walls of the central bore.
  • the valve stem (4) which is responsible for the activation of the valve and for this reason the mechanically most solicited part is made of a thermoplastic polymer, preferably of polyolefin, most preferably of high density polyethylene (HDPE) which has the lowest water vapour transmission rate of all plastics.
  • the thermoplastic polymer may at least one filler such as glass fibres or stone fibres, e.g. basalt fibres.
  • the grommet (3) is made of a resilient material and is preferably a rubber part, e.g. of TPU, which has very good mechanical properties. Rubber parts have good mechanical properties, but a relatively high water vapour transmission rate in comparison to polyolefins.
  • the flange (6) of the valve stem (4) is designed in order to cover at least partially the grommet (3), e.g. by sealing against the valve cup (2).
  • the grommet (3) which has a higher water vapour transmission rate than the stem is covered or sealed at least partially from the product in the container either by a protection screen formed by the flange (6) of the valve stem (4) or by a plastic to cup contact (valve stem (4) to valve cup (2)).
  • the flange (6) of the valve stem (4) seals fully against the valve cup (2).
  • This solution prevents water vapour from entering in contact with the product in the container or at least decreases the amount of water vapour entering in contact with the product in the container. All negative effects of water vapour entering into contact with the product, such as skin formation and sticking are thereby avoided or at least decreased.
  • Another advantage is the reduction of splashback during filling of the container.
  • the grommet (3) is at least partially isolated from the chemicals in the container so that degradation of the grommet (3) due to chemical influences is avoided. All these advantages lead to a longer shelf life of the container. There are neither supplementary parts required nor is the production more difficult than for valves according to the prior art.
  • This rib (10) in the inner surface of the valve cup (2) may be closer to the upper side of the valve (1) than the stem (4).
  • the grommet (3) which extends more or less to the groove (10) in the inner surface of the valve cup (2) is sealed by the flange (6) of the valve stem (4) which has a conical form with the free end being directed upward to the rib (10) in the inner surface of the valve cup (2).
  • This solution is shown in Figure 1 .
  • the flange (6) of the valve stem (4) needs not to be directed upwardly but may have a disk form extending to the rib (10) in the inner surface of the valve cup (2) in order to seal the grommet (3).
  • Figure 3 shows different degrees of coverage.
  • Figure 3 is a 2D bottom view (most outer diameter) of the grommet area.
  • the grommet (3) is represented by a fine line
  • the flange (6) of the valve stem (4) is represented with four different diameters, each diameter being represented by a different line. They show a 40 % coverage (strong line), a 60 % coverage (thin dashed line), a 80 % coverage (dotted line) and a 100 % coverage (strong dashed line) of the grommet (3).
  • the coverage should be for at least 65 %, preferably 70 %, more preferably 80 % and still more preferably 90 % covered by the flange of the valve stem. In the best case, it is 100 % covered by the flange of the valve stem.
  • FIG. 4 shows results of a comparison test of a conventional valve and of a valve according to the invention.
  • Two valves have been compared, one being a standard CSV valve (CSV301x) and the other one a valve according to the present invention (EXP3418-00). Both valves have the same grommet material (TPU), design (except for the diameter of the flange of the valve which results in a coverage of 61.04 % for the standard CSV valve and in a coverage of 100 % for the valve according to the present invention).
  • TPU grommet material
  • Each valve has been tested with two different PU foam formulations (F7198 and F7716). Skin formation has been observed weekly.
  • valve according to the present invention does not show skin formation after 4 weeks whereas the standard valve shows skin formation after less than one week. Since the valves were identical with the exception of the flange of the valve, it can be concluded that valve according to the present invention shows clearly improved performance compared to the standard valve.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
EP14181669.4A 2014-08-20 2014-08-20 Ventil Withdrawn EP2987749A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14181669.4A EP2987749A1 (de) 2014-08-20 2014-08-20 Ventil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14181669.4A EP2987749A1 (de) 2014-08-20 2014-08-20 Ventil

Publications (1)

Publication Number Publication Date
EP2987749A1 true EP2987749A1 (de) 2016-02-24

Family

ID=51383613

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14181669.4A Withdrawn EP2987749A1 (de) 2014-08-20 2014-08-20 Ventil

Country Status (1)

Country Link
EP (1) EP2987749A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107336920A (zh) * 2017-08-06 2017-11-10 安徽高德韦尔精密部件有限公司 阀门密封塞
BE1026178A1 (nl) 2019-05-17 2019-10-28 Altachem Nv Vloeistofafgiftecontainer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4171757A (en) * 1976-06-08 1979-10-23 Diamond George B Pressurized barrier pack
US4958755A (en) * 1987-04-06 1990-09-25 Gerstung Enterprises, Inc. Valve for pressurized dispensing cans
EP1103490A1 (de) * 1999-11-29 2001-05-30 Lindal France Zerstaüber mit Treibgas
WO2005102867A1 (en) * 2004-04-23 2005-11-03 Aster De Schrijver Valves with reduced flat grommet height
WO2009004097A1 (en) * 2007-07-05 2009-01-08 Aster De Schrijver Aerosol valve
WO2009042206A1 (en) 2007-09-26 2009-04-02 Precision Valve Corporation Aerosol valve
WO2012101061A1 (en) 2011-01-27 2012-08-02 Altachem Nv Valve for an aerosol container
EP2354037B1 (de) 2010-02-02 2013-04-10 Altachem N.V. Ventilschaft mit Dichtungsschicht

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4171757A (en) * 1976-06-08 1979-10-23 Diamond George B Pressurized barrier pack
US4958755A (en) * 1987-04-06 1990-09-25 Gerstung Enterprises, Inc. Valve for pressurized dispensing cans
EP1103490A1 (de) * 1999-11-29 2001-05-30 Lindal France Zerstaüber mit Treibgas
WO2005102867A1 (en) * 2004-04-23 2005-11-03 Aster De Schrijver Valves with reduced flat grommet height
WO2009004097A1 (en) * 2007-07-05 2009-01-08 Aster De Schrijver Aerosol valve
WO2009042206A1 (en) 2007-09-26 2009-04-02 Precision Valve Corporation Aerosol valve
EP2354037B1 (de) 2010-02-02 2013-04-10 Altachem N.V. Ventilschaft mit Dichtungsschicht
WO2012101061A1 (en) 2011-01-27 2012-08-02 Altachem Nv Valve for an aerosol container

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107336920A (zh) * 2017-08-06 2017-11-10 安徽高德韦尔精密部件有限公司 阀门密封塞
BE1026178A1 (nl) 2019-05-17 2019-10-28 Altachem Nv Vloeistofafgiftecontainer

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