EP0078936B1 - 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
EP0078936B1
EP0078936B1 EP82109534A EP82109534A EP0078936B1 EP 0078936 B1 EP0078936 B1 EP 0078936B1 EP 82109534 A EP82109534 A EP 82109534A EP 82109534 A EP82109534 A EP 82109534A EP 0078936 B1 EP0078936 B1 EP 0078936B1
Authority
EP
European Patent Office
Prior art keywords
cap
piston
propellant gas
foam
cylinder
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.)
Expired
Application number
EP82109534A
Other languages
German (de)
English (en)
Other versions
EP0078936A2 (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
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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(B1) "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 according to the preamble of claim 1, 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 a blowing agent and foaming agent existing can filling is used.
  • the pressure can according to the invention can be filled with differently composed substances. These include rubber-oil, butyl, silicone-acrylate-based sealants and other base materials.
  • the preferred field of application of the invention is that of polyurethane foams, which are used for sealing, filling, isolating, gluing and fastening, in particular in the building industry. In general, u. a. Because of the considerable internal pressure, sheet steel pressure cans with special valves that facilitate the processing of the can contents.
  • Pressure cans of this type are known (US Pat. No. 3,362,589).
  • a filling is accommodated in the interior of such pressure cans, which, in the preferred field of application of the invention, consists on the one hand of the polyurethane prepolymer comprising different formulation components to about 60% and about 40% of the propellant gas.
  • Part of the propellant gas which is about 10%. H. of the entire filling, is required as a so-called «yeast for 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.
  • 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.
  • the presumed known pressure can serves various purposes, e.g. B. the spraying of injecticides and fungicidal liquids and prevents on the one hand the contact of the propellant gas with the liquid to be dispensed and on the other hand the passage of the propellant gas into the atmosphere through a flexible piston seal that seals on the wall of the frame cylinder and a lip of the piston skirt, thereby causing the piston forms a partition between a container part containing only propellant gas and a further container part which holds the liquid to be dispensed.
  • the piston moves upward 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 diversion of the necessary propellant for yeast then makes it difficult.
  • the invention has for its object to set up the known known pressure can with little effort so that its application technology is simplified.
  • the foaming agent i.e. H. e.g. B. displaced the polyurethane prepolymer from the initially larger space of the pressure cell due to the propellant pressure applied to the piston head as soon as the valve is opened, from which the foam emerges and as soon as the piston migrates upwards along the cylinder wall.
  • Pressure medium can pass between the piston skirt and the cylinder wall into the foaming agent. In this, it forms part of the required "yeast". The other part was previously placed in 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 escaping quantity is 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 portion of propellant gas used as a means of transport into the atmosphere is largely prevented, but on the other hand the foam yield can be increased considerably. In comparable cases, it is 50 to 60 l, the amount depending 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 pointing down during operation. This is particularly true in the ceiling area and in hard-to-reach places in construction, e.g. B. when foaming floors cheap.
  • pressure cans become one at the manufacturer, the dealer and the user time not exactly definable beforehand.
  • Certain foaming agents especially isocyanate, tend to stick when exposed to atmospheric moisture.
  • the only dustproof cap does not protect.
  • the rubber seal of the valve 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 at the same time the valve body is made inaccessible when the cap is intact.
  • 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 edge and the axially blocking edge. 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, d. H. truncated cone-shaped 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 runs on the cylinder wall, but the piston in the can has enough play to be movable in the direction of the can axis 16 without jamming.
  • 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 bottom 6.
  • the propellant is filled with 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 room 23 above the piston crown 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 illustrated embodiment to the outside, i. H. 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 inner seal that the user has to overcome when using the contents of the can.
  • 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.
  • 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 is around the closure 11, i. H. 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 with the help of the handle 34.
  • the blowing agent can be introduced via the opening 21 and the valve rubber ring 22 with the aid of the filling needle described and which is hollow on the inside.
  • 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.
  • propellant passes 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.
  • the piston reaches its upper end position, in which it strikes the dome 8 or the closure flap 11.
  • Propellant then presses between the piston skirt 15 and the cylinder wall 2 as a result of the piston play and presses the liquid medium still contained in the greatly reduced or completely closed space 23 through the valve 12 so that the can is completely emptied.
  • the amount of propellant gas exiting through the valve 12 after the can has been emptied is very small. Practically all of the propellant gas required for transport is therefore retained in the can.

Claims (3)

1. Récipient sous pression pour la décharge de mousses de montage, notamment de mousse de polyuréthane d'un composant, produite à partir d'un produit moussant et d'une partie d'un gaz de propulsion qui assure le foisonnement de la mousse ; ce récipient ayant un corps (1), qui comporte une partie cylindrique (2), un fond (6) de préférence bombé vers l'intérieur, et une partie supérieure en forme de dôme (8), pourvue d'un organe d'obturation (11) pour débiter le produit moussant à travers une soupape (12) ; un piston (14) monté librement à coulisse dans le corps du récipient, et guidé par la paroi de la partie cylindrique de celui-ci ; le fond du piston délimitant, avec une partie supérieure (24) d'une certaine longueur du corps cylindrique, et avec le dôme (8) et l'organe d'obturation (11), le volume du contenu à débiter ; alors que le gaz de propulsion est contenu dans un autre volume du récipient, délimité par le fond (6) de celui-ci, et par la partie inférieure (19) du corps cylindrique et le piston (14) ; ce volume du gaz propulsif étant obturé par une soupape à sens unique montée dans le fond du récipient, ou par un bouchon enfoncé à force dans ce fond ; le récipient étant caractérisé en ce que le piston (14) qui flotte sur le gaz de propulsion est guidé par sa jupe (15) contre la paroi de la partie cylindrique (2) du récipient ; et en ce que la dose de gaz de propulsion qui est nécessaire pour assurer le foisonnement de la mousse est constituée par une certaine quantité de gaz de propulsion introduite par en haut dans le récipient (1) en cours de remplissage, en supplément de la dose de produit moussant, et par une autre quantité de gaz de propulsion qui passe entre la jupe du piston et la paroi du corps cylindrique du récipient, dans la dose de produit moussant.
2. Récipient selon la revendication 1, caractérisé en ce que la soupape de débit (12) est disposée sous le fond d'un chapeau de protection (31), qui présente un rebord profilé (32) adapté à venir en appui autour de l'organe d'obturation ; ce rebord assurant l'immobilisation du chapeau (31) dans le sens axial, et portant un organe de prise (34), qui permet d'arracher le rebord pour le séparer du chapeau ; ce rebord (32) du chapeau étant ainsi en appui étanche sur le bord de l'organe d'obturation, et présentant une lisière interne (35) qui maintient un joint annulaire (36) appliqué sur le bord de la coupelle, et une lèvre (33) qui bloque le chapeau dans le sens axial et qui peut être arrachée au moyen de l'organe de prise (34) fixé au chapeau (31), pour être séparée de celui-ci.
3. Récipient selon la revendication 2, caractérisé en ce que le rebord profilé (32) du chapeau comporte un élément de liaison (39) de forme cylindrique, disposé entre la lisière interne (35) et la lèvre de blocage axial (33).
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
DE3147006 1981-11-27
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

Publications (3)

Publication Number Publication Date
EP0078936A2 EP0078936A2 (fr) 1983-05-18
EP0078936A3 EP0078936A3 (en) 1984-02-22
EP0078936B1 true 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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0113241A2 (fr) * 1982-12-27 1984-07-11 Walter C. Beard Soupape refermable avec fermeture extérieure hermétique détachable
EP0115186A1 (fr) * 1982-12-27 1984-08-08 Walter C. Beard Soupape refermable avec fermeture extérieure hermétique détachable

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
ATE280199T1 (de) * 1993-02-10 2004-11-15 Rathor Ag Prepolymerzusammensetzung für dämmschäume
EP0655394B1 (fr) * 1993-11-25 1997-08-06 Rathor Ag Récipient sous pression
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
DE19614277A1 (de) * 1996-04-11 1997-10-16 Beiersdorf Ag Verwendung einer feuchtigkeitsvernetzenden Einkomponenten-Polyurethanmasse zur reversiblen Abdeckung eines festen Untergrundes
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
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
EP2371738A1 (fr) * 2010-03-29 2011-10-05 Soudal Récipient jetable amélioré

Family Cites Families (11)

* 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
US2980299A (en) * 1958-06-09 1961-04-18 Smith Robert Archer Closure actuator
NL270347A (fr) * 1960-10-18
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
US3362589A (en) * 1966-06-23 1968-01-09 Continental Can Co Piston for aerosol can
US3760987A (en) * 1971-06-02 1973-09-25 American Home Prod Snap assembled dispensing package and cover
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
US4253459A (en) * 1979-11-19 1981-03-03 Aluminum Company Of America Additive transfer unit with stabilized sealing means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0113241A2 (fr) * 1982-12-27 1984-07-11 Walter C. Beard Soupape refermable avec fermeture extérieure hermétique détachable
EP0115186A1 (fr) * 1982-12-27 1984-08-08 Walter C. Beard Soupape refermable avec fermeture extérieure hermétique détachable
EP0113241A3 (fr) * 1982-12-27 1985-04-10 Walter C. Beard Soupape refermable avec fermeture extérieure hermétique détachable

Also Published As

Publication number Publication date
DK160933C (da) 1991-10-28
US4508244A (en) 1985-04-02
DK160933B (da) 1991-05-06
DE3271416D1 (en) 1986-07-03
EP0078936A2 (fr) 1983-05-18
EP0078936A3 (en) 1984-02-22
CA1205431A (fr) 1986-06-03
DK493482A (da) 1983-05-07

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