EP0936997B1 - Emballage pour solvant a couvercle encliquetable etanche en termes d'asepsie - Google Patents

Emballage pour solvant a couvercle encliquetable etanche en termes d'asepsie Download PDF

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Publication number
EP0936997B1
EP0936997B1 EP97910398A EP97910398A EP0936997B1 EP 0936997 B1 EP0936997 B1 EP 0936997B1 EP 97910398 A EP97910398 A EP 97910398A EP 97910398 A EP97910398 A EP 97910398A EP 0936997 B1 EP0936997 B1 EP 0936997B1
Authority
EP
European Patent Office
Prior art keywords
snap
edge
head
package
sealing lip
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 - Lifetime
Application number
EP97910398A
Other languages
German (de)
English (en)
Other versions
EP0936997A1 (fr
Inventor
Lars Bergholtz
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
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 Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Publication of EP0936997A1 publication Critical patent/EP0936997A1/fr
Application granted granted Critical
Publication of EP0936997B1 publication Critical patent/EP0936997B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/46—Snap-on caps or cap-like covers
    • B65D41/48—Snap-on caps or cap-like covers non-metallic, e.g. made of paper or plastics
    • B65D41/485—Snap-on caps or cap-like covers non-metallic, e.g. made of paper or plastics with integral internal sealing means

Definitions

  • the invention relates to a plasticizer with snap lid, both made of thermoplastic Made of plastic, in which the collar-shaped head encloses a pouring opening, one inside approximately ring-shaped inner surface, at the top at the free end has an edge with a snap catch and through the snap lid is closable, from the closure wall inside an annular sealing lip protrudes toward the inside of the pack and sealingly engages the inner surface of the rim can be brought, wherein the snap lid has an outer catch, the head of the pack on his The rim is extended radially outwards and upwards and the inner surface of the rim extends in the direction of view this is convexly curved.
  • the radially outward curved surface of the softer Inner part touches the head end of the bottle neck at the end of the cylindrical area, so that two oppositely convex curved surfaces do not lie opposite each other in the sealing area. However, this means that a sealing area cannot be reached with a single sealing line.
  • FR-A-1 150 059 a multiple seal on the packing head with a snap lid is known.
  • this surface is not an oppositely convex one Surface at the top opposite. Therefore, there can be no sealing area with only one sealing line in it.
  • the weak sealing force is said to be according to this document can also be improved by adding two further sealing areas, because you get multiple support lines. This division of the contact forces suffers the sealability.
  • the object of the invention is to provide an eluent pack of the type mentioned, the Head can be aseptically sealed with the snap cover.
  • the object is achieved for the superplasticizer in that the outer Surface of the sealing lip on the snap cover in the direction of view of this is also convexly curved inner surface of the edge and the outer surface of the sealing lip in sealing engagement an annular Sealing area with only one sealing line in it, maximum compressive stress form.
  • the closure wall is a flat, round Disc, which is preferably substantially flat. Closes on its annular outer circumference an outer ring attaches to a curve, which ensures that the edge of the head is enclosed.
  • the Outer ring may be weak against the edge of the head, e.g. B. at an angle from 5 to 10 °, preferably about 20 °.
  • a locking device attached, if necessary, via a catch on the head of the pack for mounting of the snap lid on the head.
  • Such a snap lid is clamped onto the edge of the pack and is particularly easy to use by engaging at the free end that the head of the pack expands outwards and upwards.
  • the diameter of the edge is therefore larger on average at the upper free end of the packing head than the diameter of the pouring opening.
  • Bacteria and spores are generally much larger than helium atoms and can therefore less a helium-tight seal than helium atoms.
  • Aseptic tightness To define the invention, two criteria have been defined: the first criterion requires tightness towards helium. The second criterion for an aseptically tight seal requires sterilizability the sealing surfaces.
  • An aseptically tight closure in the sense of the teaching according to the invention is therefore a closure which is at least tight against methyl alcohol, preferably even tight against Helium. This condition is ensured by the solution according to the invention.
  • the sealing surfaces of the aseptically sealed closure can be sterilized well. That is u. a. then particularly well guaranteed if the inside of the Spout facing surfaces of both the top edge and the snap lid as possible have smooth surfaces. According to the invention it is ensured that the inside of the pack facing surfaces have no or almost no undercuts. The sterilization process then grip particularly well.
  • a radially outward and upward widening Edge on the one hand and a snap cover with a sealing lip projecting downwards on the other enable smooth surfaces without undercuts.
  • the tightness between the head of the pack and the snap lid is in the case of the invention checked by two different mechanisms, the following macrological seal and micrological Be called poetry. It may be enough if the micrological seal is measured and is achieved to seal a packing head of the type described here with a To describe snap covers as aseptic.
  • the snap cover has on its inside a ring-shaped snap notch that surrounds the sealing lip and extends over the edge of the head, and the thickness of the snap cover is smaller towards the outside and above the snap notch than in the area of the outside catch.
  • the material thickness is reduced according to the invention so that it is less than the material thickness in the area of the outer catch, which - without intervening Head of the pack - faces the outer surface of the sealing lip.
  • the wall thickness is greater than selected in the transition area described above.
  • the snap lid has a greater rigidity.
  • this bend line is the point around which the outer ring can rotate.
  • a vertical point is a point of rotation created in the transition area between the closure wall and the outer ring of the snap cover, through the compensation options for form errors of the sealingly to be brought into engagement with one another Parts are given, as was previously unknown with conventional closures.
  • the second tightness criterion can also be met, in addition to the micrological tightness is also given.
  • Macrological tightness larger form errors of the snap lid or the packing head are compensated, such as. B. Out of roundness, delay.
  • the compensating rotation line a rotation point in vertical section
  • the Snap lid is made of relatively soft plastic and the large material thicknesses lead to a relatively rigid behavior in the area of the outer catch and also in the area of the sealing lip, results from the tapering of the material in the range described above Rotation line.
  • the macrological seal also takes over the function, suitable tensile and compressive forces for the secure fit of the snap lid on the packing head and to provide for the contact pressure of the sealing lip.
  • the cross section along the pouring opening Radius of curvature of the inner surface of the edge of the packing head from the inside of the package decreases towards the free end, preferably reduced from infinity to 0.5 mm.
  • the sealing properties proven to be very favorable when the radius of curvature towards the outside is free Decreases at the end. It is similarly favorable if, according to the invention, the cross section along the pouring opening the radius of curvature of the outer surface of the sealing lip on the snap cover in the area from 0.2 mm to 2 mm.
  • the area with the strongest curvature is on the surface where it has a radius of curvature of only 0.2 mm; during the area of weakest curvature has a radius of preferably about 2 mm.
  • the convexly curved inner surface in the area of the head edge and the opposite convex curved outer surface of the sealing lip for a high surface quality a low one Have roughness and are designed without raised parts.
  • the production tool is now according to the invention To be designed in such a way that such parting lines, if necessary at all on the tool are not to lie in the oppositely curved surfaces mentioned come. This results in smooth sealing surfaces and optimal tightness. Preferably can to mirror polish the tools for making these convex curved surfaces. This results in a high surface quality, which further improves the tightness.
  • the snap lid is made of a softer thermoplastic than the head of the Pack, preferably made of amorphous polyethylene.
  • the plasticizer pack comes from a preform is blown, it is appropriate if this preform z.
  • B. consists of PET, APET, PETG.
  • the head of the superplasticizer package according to the invention shaped as described above In this way, the use of materials for aseptically closable packs can advantageously be reduced.
  • the wall thickness of the head can also be made thinner.
  • the approx. 50 g weighs 6 g of PET can be saved in the preform according to the invention.
  • plasticizer pack shaped according to the invention is the functional division into the macrological seal and the micrological seal. This means that large error tolerances are reliably achieved balanced, which can occur when molding the pack. Because the point of contact or the contact line of the micrological seal on the curved inner surface of the packing head can migrate over a wide range both in the axial and in the radial direction, large error tolerances can also be reliably compensated for.
  • the packaging with drinks molded with the packing head according to the invention can be used fill with low carbon dioxide content.
  • the internal pressure of a filled package e.g. B. a PET bottle, is advantageously in the range of 1 bar - 4 bar.
  • the plasticizer pack 1 shown in FIG. 2, here a PET bottle, has one at its upper end with a snap lid 2 closed, collar-shaped head 3. This encloses one Pouring opening 4.
  • the cross-sectional views of the figures are through the longitudinal central axis 5 of the Plasticizer pack 1 taken.
  • the pouring opening 4 is arranged on the inside of the head 3, surrounded annular inner surface 7. This can be in the lower region of the pouring opening 4, namely towards the inside of the pack 1, be substantially cylindrical in shape.
  • the simplicity half the shape of this inner surface 7 is almost in the schematic representation of Figure 1 cylindrical jacket-shaped, while this inner surface 7 in the embodiments according to FIGS. 2 to 3 in the neck area of the pack, d. H.
  • the head 3 of the pack 1 is provided on the outside below the edge 11 with a catch 15, which as Projection an outer groove 16 limited upwards.
  • the latter is characterized by an outwardly protruding one Retaining ring 17 limited at the bottom. The same conditions can be found on the head 3 of the plasticizer pack 1.
  • Locking device 18 of the snap cover 2 One engages in the annular outer groove 16 of the head 3, which runs perpendicular to the longitudinal central axis 5 Locking device 18 of the snap cover 2.
  • This locking device 18 forms for the consumer When the pack is filled and closed, a visual safety device, which is the first opening the pack indicates by breaking points 19 of the lock 18 when first Break open the snap cover.
  • the snap lid 2 is generally in the form of a Cup, which is clamped onto the head 3 with the opening facing downward in the cross section of a U. becomes.
  • the snap cover 2 then has the essentially flat closure wall 20 at the top. Outside this is followed by an approximately cylindrical jacket-shaped outer ring 21, which is opposite the opening handle 22 is hinged like a hinge, the hinge partly but only through the predetermined breaking points 19 is formed and does not play a special role. After opening several times, the predetermined breaking point 19 also break in this area opposite the handle 22, so that the Snap lid 2 can then be removed loosely after opening it again.
  • annular sealing lip 23 On the inside Inside the pack 1.
  • the radially outer surface 24 of this sealing lip 23 is from the center designed radially curved outwards.
  • the snap cover is in the transition area between the closure wall 20 and the outer ring 21 2 provided with a snap notch 27. Radial outwards, diagonally upwards is the material of the Snap lid 2 formed with a thickness d that is smaller than the thickness of the closure wall 20th with the result that an annular rotation line 28 results in the snap cover 2, which in FIG Clarification is shown as a point. This point of rotation or line of rotation 28 is an element the macrological poetry described above.
  • the snap notch 27 enables interaction with a bulge-shaped underneath, provided on the inside of the outer ring 21 29 and the snap catch 12 of the head 3 securely closes the snap cover 2 on the head 3.
  • the imaginary force arrow 30 schematically shows the closing force in FIG.
  • the new snap lock offers in particular with its micrological seal in that the support line 26 migrates on the curved inner surface 13 of the edge 11 can and thus compensate for thermal expansion, an increased compared to leaks Safety Increased safety against leaks is also made possible due to manufacturing tolerances of the preforms 6, as shown in FIG. 4, of the snap lid 2 or the one formed by blowing Pack 1 (PET bottle) may result. Also caused by vibrations In this way, any leaks are avoided.
  • the inner surface 13 on the edge 11 is formed with a highly polished injection molding tool.
  • Such tools can in particular be made such that in the area of these inner Surface 13, which forms the curved sealing surface of the head 3, to lie no parting planes come.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Packages (AREA)

Claims (6)

  1. Emballage pour solvant (1) à bouchon encliquetable (2), tous deux en matière thermoplastique, dans lequel la tête (3) en forme de col enferme une ouverture de versement (4), présente à l'intérieur une surface intérieure (7) sensiblement annulaire, possède en haut à l'extrémité libre (10) un bord (11) comportant un renflement d'encliquetage (12), et peut être fermée par le bouchon encliquetable (2) qui possède une paroi de fermeture (20) de laquelle une lèvre d'étanchéité annulaire (23) fait saillie du côté intérieur en direction de l'intérieur de l'emballage (1) et peut être amenée en engagement étanche avec la surface intérieure (13) du bord (11), le bouchon encliquetable (2) comportant un renflement d'encliquetage extérieur (29), la tête (3) de l'emballage (1) s'élargissant radialement vers l'extérieur et en haut au niveau de son bord (11) et la surface intérieure (13) du bord (11) étant incurvée convexe dans la direction d'observation (14),
    caractérisé en ce que la surface extérieure (24) de la lèvre d'étanchéité (23) est également incurvée convexe dans la direction d'observation (25) au niveau du bouchon d'encliquetage (2), et la surface intérieure (13) du bord (11) ainsi que la surface extérieure (24) de la lèvre d'étanchéité (23) forment en engagement étanche une région d'étanchéité annulaire comportant une ligne d'étanchéité intérieure (26) de contrainte de compression maximale.
  2. Emballage selon la revendication 1, caractérisé en ce que le bouchon d'encliquetage (2) comporte sur son côté intérieur une encoche d'encliquetage (27) annulaire qui entoure la lèvre d'étanchéité (23) et qui s'engage par-dessus le bord (11) de la tête (3), et en ce que l'épaisseur (d) du bouchon d'encliquetage (2) est plus faible dans la direction allant vers l'extérieur et au-dessus de l'encoche d'encliquetage (27) que dans la région du renflement d'encliquetage extérieur (29).
  3. Emballage selon la revendication 1 ou 2, caractérisé en ce que, dans une vue en coupe transversale le long de l'ouverture de versement (4), le rayon de courbure de la surface intérieure (13) du bord (11) de la tête d'emballage (3) diminue de l'intérieur de l'emballage (1) vers l'extérieur en direction de l'extrémité libre (10), et avantageusement diminue très vite jusqu'à atteindre la valeur de 0,5 mm.
  4. Emballage selon l'une des revendications 1 à 3, caractérisé en ce que, dans une vue en coupe transversale le long de l'ouverture de versement (4), le rayon de courbure de la surface extérieure (24) de la lèvre d'étanchéité (23) au niveau du bouchon d'encliquetage (2) est compris entre 0,2 mm et 2 mm.
  5. Emballage selon l'une des revendications 1 à 4, caractérisé en ce que la surface intérieure (13) incurvée convexe au niveau du bord (3) de la tête et la surface extérieure (24) incurvée convexe de la lèvre d'étanchéité (23) présentent une faible rugosité et sont conformées sans parties saillantes en vue d'obtenir une qualité de surface élevée.
  6. Emballage selon l'une des revendications 1 à 5, caractérisé en ce que le bouchon d'encliquetage (2) est en une matière thermoplastique plus molle que la tête (3) de l'emballage (1), avantageusement en polyéthylène amorphe.
EP97910398A 1996-11-02 1997-10-01 Emballage pour solvant a couvercle encliquetable etanche en termes d'asepsie Expired - Lifetime EP0936997B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19645263A DE19645263A1 (de) 1996-11-02 1996-11-02 Fließmittelpackung mit aseptisch dichtem Schnappdeckel und Vorformling zur Herstellung dieser Packung
DE19645263 1996-11-02
PCT/EP1997/005387 WO1998019930A1 (fr) 1996-11-02 1997-10-01 Emballage pour solvant a couvercle encliquetable etanche en termes d'asepsie et preforme utilisee pour produire cet emballage

Publications (2)

Publication Number Publication Date
EP0936997A1 EP0936997A1 (fr) 1999-08-25
EP0936997B1 true EP0936997B1 (fr) 2004-06-09

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Application Number Title Priority Date Filing Date
EP97910398A Expired - Lifetime EP0936997B1 (fr) 1996-11-02 1997-10-01 Emballage pour solvant a couvercle encliquetable etanche en termes d'asepsie

Country Status (9)

Country Link
US (1) US6260723B1 (fr)
EP (1) EP0936997B1 (fr)
JP (1) JP2001503356A (fr)
AT (1) ATE268722T1 (fr)
AU (1) AU4780197A (fr)
DE (2) DE19645263A1 (fr)
ES (1) ES2219756T3 (fr)
TW (1) TW353056B (fr)
WO (1) WO1998019930A1 (fr)

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Also Published As

Publication number Publication date
ES2219756T3 (es) 2004-12-01
DE19645263A1 (de) 1998-05-07
EP0936997A1 (fr) 1999-08-25
TW353056B (en) 1999-02-21
ATE268722T1 (de) 2004-06-15
JP2001503356A (ja) 2001-03-13
US6260723B1 (en) 2001-07-17
AU4780197A (en) 1998-05-29
WO1998019930A1 (fr) 1998-05-14
DE59711712D1 (de) 2004-07-15

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