EP0078936A2 - Récipient sous pression pour la décharge de mousses de montage, notamment de mousse de polyuréthane d'un composant - Google Patents

Récipient sous pression pour la décharge de mousses de montage, notamment de mousse de polyuréthane d'un composant Download PDF

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Publication number
EP0078936A2
EP0078936A2 EP82109534A EP82109534A EP0078936A2 EP 0078936 A2 EP0078936 A2 EP 0078936A2 EP 82109534 A EP82109534 A EP 82109534A EP 82109534 A EP82109534 A EP 82109534A EP 0078936 A2 EP0078936 A2 EP 0078936A2
Authority
EP
European Patent Office
Prior art keywords
pressure
cylinder
cap
piston
closure
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.)
Granted
Application number
EP82109534A
Other languages
German (de)
English (en)
Other versions
EP0078936B1 (fr
EP0078936A3 (en
Inventor
Emil Ing. Plaschka
Mathias Pauls
Guido Niggli
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.)
Polypag AG
Original Assignee
Polypag AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27189678&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0078936(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19813147006 external-priority patent/DE3147006A1/de
Priority claimed from DE19813147004 external-priority patent/DE3147004A1/de
Application filed by Polypag AG filed Critical Polypag AG
Priority to AT82109534T priority Critical patent/ATE20025T1/de
Publication of EP0078936A2 publication Critical patent/EP0078936A2/fr
Publication of EP0078936A3 publication Critical patent/EP0078936A3/de
Application granted granted Critical
Publication of EP0078936B1 publication Critical patent/EP0078936B1/fr
Expired 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
    • B65D83/60—Contents and propellant separated
    • B65D83/64—Contents and propellant separated by piston
    • 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
    • B65D83/40—Closure caps

Definitions

  • the invention relates to a pressure can for dispensing assembly foams, in particular one-component polyurethane foam, the frame of which has a cylinder, a preferably indented bottom and a dome-like upper part with a closure, into which a valve for dispensing the can filling consisting of a blowing agent and foaming agent is inserted.
  • Such pressure cans are generally filled with differently composed substances. These include sealants based on rubber oil, butyl, silicone-acrylate or other base materials.
  • sealants based on rubber oil, butyl, silicone-acrylate or other base materials.
  • the preferred field of application of the invention is that of polyurethane foams, which are used for sealing, filling, insulating, gluing and fastening can be used in particular in construction.
  • sheet steel pressure cans with special valves, which facilitate the processing of the can contents, are used for these substances, inter alia because of the considerable internal pressure.
  • Pressure cans of this type are known (DE-GM 77 10 802.2).
  • a filling is accommodated which, in the preferred field of application of the invention, consists on the one hand of the polyurethane prepolymer containing various formulation components, to about 60% and about 40% of the propellant gas.
  • Part of the propellant gas which is about 10%. of the entire filling is required as so-called "yeast" for the foam formation.
  • the remaining portions of the propellant serve as a means of transportation.
  • the recipe components separate. For this reason, intensive mixing must be brought about again shortly before processing by vigorous and long shaking. As far as the gas acts as a blowing agent, it evaporates after the foam emerges.
  • the foam yield is influenced by various factors. Depending on the type of foam, however, the foam yield is approx. 25 to a maximum of 30 liters with the 1 kg pressure cans. So far, it has also not been possible to significantly increase the foam yield. Rather, it is shown that about 5% of the polyurethane prepolymer remains unused in the can after it has been completely emptied of its propellant gas.
  • Pressure vessels are known for various purposes, including for the spraying of insecticidal and fungicidal liquids (GB-PS 746 895), in which on the one hand the contact of the propellant gas with the liquid to be dispensed and on the other hand the transfer of the propellant gas into the atmosphere through a flexible membrane prevents which forms a partition between a container part containing only propellant gas and a further container compartment which holds the liquid to be dispensed.
  • the membrane turns inside the liquid compartment under the pressure of the propellant gas and thereby displaces the liquid, which is consequently expelled from the container without the propellant gas.
  • this technique requires a complex overall structure of the pressure vessel, which is not portable with the usual substances of the type described in the introduction.
  • the branching off of the necessary propellant for the "yeast” then makes it difficult.
  • the invention has for its object to set up cans of the general structure described at the outset so that the transfer of the propellant gas into the atmosphere is restricted or completely prevented and the application technology is simplified.
  • this object is achieved in that the inside of the wall of the cylinder of the frame leads the shirt of an overhung piston which is overhung between the propellant or foaming agent filling housed in separate can spaces and that of the can bottom and a change Lichen lower length of the cylinder wall enclosed propellant gas space separates from the overlying, the foam-forming space, which is enclosed by the piston crown and the remaining length of the cylinder and the closure.
  • the foaming agent i.e. e.g. the polyurethane prepolymer is displaced from the initially larger space of the pressure cell as a result of the propellant pressure acting on the piston head as soon as the valve from which the foam emerges is opened.
  • the piston moves up along the cylinder wall.
  • Pressure medium can pass between the piston skirt and the cylinder wall into the foaming agent. It forms at least part of the "yeast" required. Another part can be introduced into the foaming agent when filling the pressure can.
  • the piston prevents the foaming agent from mixing with the pressure medium. Shaking the can before use is therefore no longer necessary. The quantity exiting is also no longer affected by the pressure medium.
  • Pressure fluid can only escape to a small extent and only when the piston has reached the upper end position. In this position of the piston, however, the foaming agent has already been completely emptied.
  • the invention therefore has the advantage that the passage of the propellant gas portion serving as a means of transport into the atmosphere is largely prevented, but that the foam yield can be increased considerably. In comparable cases, it is 50 to 60 1, the amount depends on the type of foam.
  • the invention also has the advantage that the new can can be processed in any position. So it does not need to be held vertically with the valve down during operation. This is particularly beneficial in the ceiling area and in hard-to-reach places in construction, for example when foaming floors.
  • the invention also allows the piston to be used to completely empty the foaming agent.
  • the invention provides, in particular, for the bottom of the piston to be provided with an indented center and frustoconical edge surfaces and to fit the dome-like upper part and the closure from the inside.
  • the foaming agent is filled from above into the still empty but already provided with the piston; the liquid pressure medium is introduced from the other side.
  • an embodiment of the invention which has a bottom flanged to the lower edge of the cylinder, which has a propellant fill opening which can be closed with a one-way valve.
  • a particularly simple embodiment of such a one-way valve is characterized by a plug made of an elastomeric material which is pressed into the bottom and which can be pierced with a filling needle. When the filling needle is withdrawn, the filling needle opening closes automatically.
  • valve body In the known pressure cell, the valve body is set up so that the amount of foam removed in each case can be dosed with the valve and also deep, narrow and hidden cavities can be filled directly from the pressure cell.
  • the tubular valve body can be tilted into this rubber body, as a result of which the seal is broken and the foam can escape through the tubular, projecting part of the valve body.
  • the frame In order to protect the outwardly projecting part of the valve body from being inadvertently tilted during transport and storage of the can, the frame must carry the cap, which is usually made of plastic.
  • the cap In general, such pressure cans are stored by the manufacturer, the dealer and the user for a time which cannot be precisely determined beforehand.
  • Certain foaming agents, particularly isocyanate tend to stick when exposed to atmospheric moisture.
  • the rubber seal allows air to diffuse through the valve body from the outside after a certain storage time, so that the contents of the can can no longer be applied when the valve is used.
  • the cap loosens and the part of the valve body protruding outwards is pushed. The foam that emerges in turn sticks to the valve and renders the contents of the can unusable.
  • the gas exchange of the cap space with the atmosphere is prevented until the can contents are used and the valve body is made inaccessible when the cap is intact.
  • the cap has a brim which is gas-tight around the closure edge, the inner rim of which holds an annular seal on the rim of the plate and has an axially blocking edge which can be removed with the aid of a handle attached to the cap.
  • the invention has the advantage that it uses the structural parts predetermined by the valve closure for the attachment and sealing of the cap. By crimping the cap brim, the plate rim can be used as a seat for the ring seal. This results in a great simplification and also a reduction in the cap size, since its diameter can practically be reduced to the diameter of the plate base. This simplification and material saving allows the implementation of the invention without any significant additional effort in spite of the considerable quantities with which such pressure cans have to be brought onto the market.
  • the cap has a cylindrical connecting part between the inner plate rim and the axially blocking rim. Since the axially locking cap edge is flanged inward only when the cap is crimped and previously forms part of the cylindrical portion of the brim, the cap can be simplified as a result.
  • the pressure cell shown has a frame, generally designated 1, which, according to the exemplary embodiment shown, consists of sheet steel.
  • the middle part consists of a cylinder 2, the lower end edge of which is flanged at 3 together with the edge 4 of a base 6 turned at 5.
  • the upper edge 7 of the cylinder 2 goes into a dome-like, i.e. frusto-conical upper part 8, whose edge 9 surrounding an opening shows a closure, generally designated 11.
  • This closure has a plate 10, the edge 13 is crimped around the edge 9.
  • the plate 10 has a central opening 40 in which a plug-shaped rubber seal 41 of a valve, generally designated 12, is accommodated.
  • the valve body denoted by 42 is tubular and closed at its inner end 43 with a plate which lies on the rubber seal under the influence of the internal pressure.
  • a piston In the cylinder 2, a piston, generally designated 14, is arranged overhung.
  • the piston skirt 15 carries at the cylinder wall, but the piston in a can sufficient play to without jamming in the direction of D to be movable osenachse sixteenth
  • the piston crown 17 closes with its underside 18 a variable lower length 19 of the cylinder 2.
  • the section 19 of the cylinder 2 surrounds a space 20 which is filled with the propellant and is closed off from the can base 6 to the outside.
  • the propellant is filled with the aid of a filling needle, not shown, via a radial opening 21 of a valve neck in the can bottom and a valve rubber ring 22 which is placed around the valve neck.
  • the piston floats on the filling of the propellant gas space 20 and on the liquid foaming agent which is located in the space 23 above the piston head 17. This space is enclosed by the remaining length 24 of the cylinder 2, the dome 8 and the closure 11.
  • the piston crown is provided on its side facing the space 23 with an indented center 25 and has generally frustoconical edge surfaces 26 which, however, in the exemplary embodiment shown outwardly, i.e. are convex. Parts of the surfaces 25, 26 can strike the inside of the dome-like upper part or the closure as soon as the piston 14 has reached its upper end position.
  • the foaming agent is introduced into the can, which is initially open at the top, with a certain amount of propellant gas being added to the foaming agent, which later forms at least part of the yeast. After flanging the rim of the plate around the edge 9, the can is closed.
  • the valve insert 12 forms the when the The contents of the nozzle must be overcome by the user if necessary. However, such a seal can also leak against diffusing moisture for various reasons, in particular during a longer storage period. This would lead to reactions with the foaming agent in the area of the valve insert 12 and thus to sticking and ultimately clogging of the valve. Therefore, a double seal is provided, which is formed from the inner seal by the valve 12 and an outer seal by means of the cap 31 shown generally in FIGS. 2 and 3.
  • the cap 31 is made of sheet metal according to the illustrated embodiment and is generally tubular. Its bottom 30 is arranged so that the valve 12 of the inner seal is underneath.
  • the cap has a brim 32 which wraps around the closure 11, ie around the crimped edge of the plate 10 and therefore also around the edge 9 of the dome 8.
  • Under the inner edge 35 of the brim 32 is an annular rubber seal 36, which brings about the gas-tight closure of the interior of the cap 31 to the outside.
  • the brim 32 has an end edge 33 which lies under the plate rim and in this way axially blocks the cap 31. This edge 33 also delimits a tab 37 with a recess 38.
  • the tab 37 forms a handle, which is generally designated 34 and by means of which the cap 31 can be separated. For this purpose, the brim 32 is torn and separated using the handle 34.
  • the propellant can be introduced via the opening 21 and the valve rubber ring 22.
  • the liquid propellant flows through the filling needle and in this way gets under the piston crown.
  • the filling needle is withdrawn, as a result of which the one-way valve closes by itself under the influence of the propellant gas. Then the can is ready for use.
  • blowing agent can pass into the filling 23 in order to form at least part of the so-called "yeast" for the foam there.
  • the liquid filling 23 cannot pass into the propellant gas space 20 without prejudice to the respective position of the can.
  • the handle 34 is actuated on the spot by the user in the manner described. This frees the valve 12. If the valve is opened by tilting the plate 43, the piston 14 moves upward. In Fig. 1 the position of the piston is indicated, which it assumes when the can is about half empty. As soon as the valve 12 is closed, the piston 14 remains in the respective position in order to start moving again when the valve is opened again.

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)
EP82109534A 1981-11-06 1982-10-15 Récipient sous pression pour la décharge de mousses de montage, notamment de mousse de polyuréthane d'un composant Expired EP0078936B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82109534T ATE20025T1 (de) 1981-11-06 1982-10-15 Druckdose zum ausbringen von montageschaeumen, insbesondere einkomponentenpolyurethanschaum.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE3144094 1981-11-06
DE3144094 1981-11-06
DE19813147006 DE3147006A1 (de) 1981-11-27 1981-11-27 "druckdose zum ausbringen von montageschaeumen, insbesondere einkomponentenpolyurethanschaum"
DE19813147004 DE3147004A1 (de) 1981-11-06 1981-11-27 "druckdose zum ausbringen von montageschaeumen, insbesondere einkomponentenpolyurethanschaum"
DE3147004 1981-11-27
DE3147006 1981-11-27

Publications (3)

Publication Number Publication Date
EP0078936A2 true EP0078936A2 (fr) 1983-05-18
EP0078936A3 EP0078936A3 (en) 1984-02-22
EP0078936B1 EP0078936B1 (fr) 1986-05-28

Family

ID=27189678

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82109534A Expired EP0078936B1 (fr) 1981-11-06 1982-10-15 Récipient sous pression pour la décharge de mousses de montage, notamment de mousse de polyuréthane d'un composant

Country Status (5)

Country Link
US (1) US4508244A (fr)
EP (1) EP0078936B1 (fr)
CA (1) CA1205431A (fr)
DE (1) DE3271416D1 (fr)
DK (1) DK160933C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0655394A1 (fr) * 1993-11-25 1995-05-31 Rathor Ag Récipient sous pression
EP0801087A1 (fr) * 1996-04-11 1997-10-15 Beiersdorf Aktiengesellschaft Utilisation d'une composition de polyuréthane à un composant durcissable par l'humidité pour le revêtement réversible d'un support fixe
WO1999062792A1 (fr) 1998-06-03 1999-12-09 Ebb Ingenieurgesellschaft Bombe a aerosol rechargeable plusieurs fois, dispositif pour remplir de tels recipients et procede permettant de les produire
EP2371738A1 (fr) * 2010-03-29 2011-10-05 Soudal Récipient jetable amélioré

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4513889A (en) * 1982-12-27 1985-04-30 Beard Walter C Reclosable valve with removable hermetic external seal means
US4469253A (en) * 1982-12-27 1984-09-04 Beard Walter C Reclosable valve with removable hermetic external seal means
NZ227284A (en) * 1987-12-22 1991-08-27 Abplanalp Robert H Extruded plastics container with ends of body portion heat sealed into recessed undercuts of the end panels
EP0684968B1 (fr) * 1993-02-10 1997-08-06 Rathor Ag Composition prepolymere pour mousses isolantes
CN1126326A (zh) * 1994-01-28 1996-07-10 苏州康瑞照相器材有限公司 用于档存照相底片的保存袋及其制造方法
CN1325529C (zh) * 1999-11-01 2007-07-11 深圳彩虹气雾剂制造有限公司 单组分聚氨酯发泡材料及其制造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2980299A (en) * 1958-06-09 1961-04-18 Smith Robert Archer Closure actuator
US3362589A (en) * 1966-06-23 1968-01-09 Continental Can Co Piston for aerosol can
DE1432447A1 (de) * 1960-10-18 1968-12-12 American Can Co Druckspritzvorrichtung fuer viskose Stoffe
US3927796A (en) * 1975-04-16 1975-12-23 Harvey B Whitehouse Container and closure therefor
FR2311593A1 (fr) * 1975-05-23 1976-12-17 Gantzer Jean Louis Emballage sous forme de bombe

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2737416A (en) * 1953-03-24 1956-03-06 Leo J Behr Nonclog cap for spray dispensers
US2809774A (en) * 1954-11-04 1957-10-15 Alf K Berle Pressure-feed device
US3262607A (en) * 1964-11-23 1966-07-26 Walter F Hirsch Safety closure cap for aerosol dispenser cans
US3273762A (en) * 1965-06-28 1966-09-20 Union Machine Company Pressure can construction including free piston
US3760987A (en) * 1971-06-02 1973-09-25 American Home Prod Snap assembled dispensing package and cover
US4253459A (en) * 1979-11-19 1981-03-03 Aluminum Company Of America Additive transfer unit with stabilized sealing means

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2980299A (en) * 1958-06-09 1961-04-18 Smith Robert Archer Closure actuator
DE1432447A1 (de) * 1960-10-18 1968-12-12 American Can Co Druckspritzvorrichtung fuer viskose Stoffe
US3362589A (en) * 1966-06-23 1968-01-09 Continental Can Co Piston for aerosol can
US3927796A (en) * 1975-04-16 1975-12-23 Harvey B Whitehouse Container and closure therefor
FR2311593A1 (fr) * 1975-05-23 1976-12-17 Gantzer Jean Louis Emballage sous forme de bombe

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0655394A1 (fr) * 1993-11-25 1995-05-31 Rathor Ag Récipient sous pression
EP0801087A1 (fr) * 1996-04-11 1997-10-15 Beiersdorf Aktiengesellschaft Utilisation d'une composition de polyuréthane à un composant durcissable par l'humidité pour le revêtement réversible d'un support fixe
WO1999062792A1 (fr) 1998-06-03 1999-12-09 Ebb Ingenieurgesellschaft Bombe a aerosol rechargeable plusieurs fois, dispositif pour remplir de tels recipients et procede permettant de les produire
EP2371738A1 (fr) * 2010-03-29 2011-10-05 Soudal Récipient jetable amélioré
BE1020139A3 (nl) * 2010-03-29 2013-05-07 Soudal Verbeterde wegwerpcontainer.

Also Published As

Publication number Publication date
EP0078936B1 (fr) 1986-05-28
DE3271416D1 (en) 1986-07-03
EP0078936A3 (en) 1984-02-22
DK493482A (da) 1983-05-07
DK160933B (da) 1991-05-06
US4508244A (en) 1985-04-02
DK160933C (da) 1991-10-28
CA1205431A (fr) 1986-06-03

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