WO2004074126A1 - Tube souple, a vidage integral et effet retour amplifie - Google Patents
Tube souple, a vidage integral et effet retour amplifie Download PDFInfo
- Publication number
- WO2004074126A1 WO2004074126A1 PCT/FR2004/000061 FR2004000061W WO2004074126A1 WO 2004074126 A1 WO2004074126 A1 WO 2004074126A1 FR 2004000061 W FR2004000061 W FR 2004000061W WO 2004074126 A1 WO2004074126 A1 WO 2004074126A1
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- WO
- WIPO (PCT)
- Prior art keywords
- tube
- skirt
- wall
- tube according
- neck
- Prior art date
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Classifications
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- 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
- B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
- B65D35/02—Body construction
- B65D35/04—Body construction made in one piece
- B65D35/08—Body construction made in one piece from plastics material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/36—Moulds having means for locating or centering cores
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
- Y10T428/1393—Multilayer [continuous layer]
Definitions
- the invention relates generally to a flexible tube - with integral emptying, resistant to stress cracking and forming a barrier to water vapor.
- the invention also relates to a method for producing such a tube.
- the invention relates, according to a first of its aspects, to an integral emptying tube provided with a wall resistant to cracking under stress and forming a water barrier, this tube essentially comprising a flexible skirt and a head, the skirt being elongated in an axial direction and having, at a first end of the tube, a filling end closed by crushing this skirt in a transverse direction, and the head comprising at least one evacuation orifice and a flexible neck forming an extension radial of the orifice and connecting to the skirt, the skirt and the neck at least constituting a one-piece assembly, the wall having, at the connection of the neck and the skirt, and in a longitudinal plane containing the axial direction and perpendicular to the transverse direction , a determined connection radius, and the skirt having, in a plane transverse to the axial direction and located mid-dist ance between the end of the neck forming the discharge orifice and the filling end of the tube, a determined perimeter and a substantially constant wall thickness, the ratio of the ratio of
- Pasty bodies such as toothpaste, pharmaceuticals, cosmetology products, food products, hygiene products, cleaning products, fatty substances, greases, sealants and adhesives are often offered in flexible tube packaging.
- These tubes consist of a tubular body of constant section before closing the filling end, of circular, oval or other shape.
- the tubular body forming what is known as the "skirt"
- the dispensing head is provided with a screwed, snapped-on or other closure means, of the so-called “standard” capsule type, the “service” capsule or the like.
- the heat sealing of the first end of the tube is carried out after filling the tube with the pasty product to be packaged.
- the capacity of the tube is one of its essential characteristics. In the particular case of a tube of constant circular section, the capacity is defined by the length and the diameter of the skirt, that is to say by the length and the diameter of the circular section of the skirt.
- the skirt of the tube must therefore be made with a flexible material.
- This material must be heat sealable. It must also have characteristics of resistance to cracking under stress, impermeability to water vapor and absence of yellowing over time under the effect of the products contained in the tube or of so-called “cross-contamination”. that is to say attributable to agents of contamination external to the tube, in order to meet the specifications for compatibility of the products intended to be packaged in the tube.
- Tubes meeting all these criteria are most often produced by assembling or overmolding the dispensing head produced by injection and the skirt produced by extrusion.
- blow molding Another method, known as blow molding, little used and expensive, consists in forming the skirt by displacement of the imprint of a mold following the injection of the head into this mold.
- At least the skirt and the neck can be produced by injection, in a single operation, as indicated in the aforementioned patent document EP 1 181 207.
- the manufacture of the tube by the injection process has many advantages: this process can replace a succession of operations by a single operation. It mainly allows great freedom of shape and eliminates the weld between the neck and the skirt of the tube, which is a zone of rigidity, therefore a factor of discomfort for the user.
- the skirt undergoes only deformations topologically equivalent to folds, and returns to its rest position under the effect of the important elastic restoring force exerted on it by the head after being arched.
- the main object of the present invention is to propose an integral emptying tube free from this defect.
- the tube of the invention is essentially characterized in that its wall presents in the plane transverse to the axial direction and located at mid distance between the end of the neck forming the discharge opening and the filling end of the tube, a median thickness of between 0.30 and 1.20 mm, preferably between 0.30 and 1.00 mm , in that it is composed of a mixture of a number "n" at least equal to 1 of polymers belonging to the family of copolymers-olefins produced from monomers of C 2 to C ⁇ o, in that at minus a first polymer of the mixture belongs to the family of polypropylenes, and in that the constituent mixture of the wall of the tube has a flexural modulus at most equal to 700 MPa, and preferably at most equal to 500 MPa according to standard NF EN ISO 178.
- the tube of the invention also has other characteristics which, although optional, contribute to giving it other qualities.
- polyethylene which is well known as being a flexible material.
- a first difficulty linked to the use of another material, and in particular polypropylene, results from the greater rigidity of this other material, at first sight very little recommended for the manufacture of flexible tubes.
- a first solution used to circumvent this difficulty consists in reducing the thickness of the wall of polypropylene-based tubes, polypropylene having the great advantage of resistance to cracking without stress, in accordance with the demand of industries using fluidity. higher than that of polyethylene. This approach is however insufficient to have a sufficiently flexible wall.
- the first polymer preferably consists of a copolymer of propylene and ethylene, for example a heterophasic copolymer of propylene and ethylene.
- the constitutive mixture of the wall may comprise at least one second polymer, for example constituted by a heterophasic copolymer of propylene and ethylene or by a linear ethylene-olefin copolymer in C 4 -C ⁇ 0 .
- the constituent mixture of the wall of the tube has a flexural modulus of between 100 and 350 Mpa, and more preferably still between 150 and 300 Mpa, according to standard NF EN ISO 178.
- the length H of the tube defined by the distance between the end of the neck and the filling end along the axis XX 'is between 40mm and 170 mm, and the wall has a thickness in the transverse plane minimum preferably equal to the square root of the length H corrected by a multiplicative coefficient between 0.045 and 0.065, this multiplicative coefficient being more preferably still between 0.050 and 0.060. It is possible to give the ratio of the determined perimeter of the skirt to the radius of connection of the neckline a value less than 3 and preferably between 0.5 and 2.
- the neck may have, with respect to the axial direction, a maximum inclination at most equal to 35 °, preferably at most equal to 30 °.
- the skirt Before welding of the filling end, the skirt is for example defined by a generator not parallel to the axial direction.
- the generator of the skirt may have, before welding the filling end of the tube, a maximum inclination at most equal to 2 ° relative to the axial direction of the tube, and preferably close to 0.5 °.
- the generatrix of the skirt is advantageously a straight line.
- the skirt has, until its connection with the neck, a wall thickness having a first value substantially constant and substantially identical to the median thickness, that the neck has, near from its end forming the discharge orifice, a wall thickness having a second value greater than the first value, and that the thickness of the wall of the neck gradually decreases from the second value to the first value from the discharge orifice to a point on the neck located at a determined distance from the connection of the neck with the skirt.
- the ratio of the second value of the thickness of the wall to the first value of the thickness of the wall is at most equal to 1.5.
- the tube of the invention may be obtained by injection into an injection mold comprising a core and an imprint, the core itself comprising a central part of which a free end is in centering support on the imprint at less during the injection phase of the tube skirt. It is moreover useful to provide that the free end of the central part of the core comprises supply channels, and that the tube has, at its injection end, a top wall at least partially formed of sectors corresponding to the channels power
- the top wall of the end of the tube is formed without openwork, after the mobile central part has receded by a distance corresponding to the thickness desired for this summit wall.
- the free end of the central portion of the core may have the shape of a re-entrant cone, the angle ⁇ formed by the scope dpf support of this free end on impression with the plane perpendicular to the longitudinal axis being less at 45 °, preferably between 15 ° and 20 °.
- the free end of the central part of the core can also have the shape of a projecting truncated cone, the angle ⁇ formed by the bearing surface of the projecting trunk of this free end on the imprint with the plane perpendicular to the longitudinal axis of the tube being between 35 ° and 45 °.
- the free end of the central part of the core is advantageously in the form of a cone returning in its internal part to the protruding truncated cone, the angle ⁇ formed by the bearing surface of the cone returning from this free end on the imprint with the pan perpendicular to the longitudinal axis of the tube being less than 45 °, and preferably between 15 ° and 20 °.
- the head comprises for example a one-piece attachment means of the end-piece type and a one-piece reducer, the end-piece and the reducer being located in the extension of the orifice in the axis XX ', the top wall of the end-piece forming the reducer , the orifice of the reducer being obtained by cutting after the tube is formed by injection, the tube, the end piece, and the reducer thus constituting a one-piece assembly formed by injection in one operation.
- the wall of the one-piece end piece carries an artillery thread.
- the tube of the invention is equipped with a plugging means provided with a conical pin, that the pin enters the orifice of the one-piece reducer, and that the pin puts in radial centrifugal tension the wall of the gearbox in the vicinity of the opening.
- the head can comprise a one-piece attachment means of tip type located in the extension of the orifice in the axis XX ', the tube and the attachment means constituting a one-piece assembly formed by injection in one operation.
- the evacuation orifice can be machined by cutting after the injection forming operation and the tube can be equipped with an attached accessory of the type of dispensing type of the attached reducing gear type or the attached cannula, or fixing means of the tip type. attached forming a reducer or cannula, or a closure type of service capsule type, the accessory reported being located in the extension of the orifice in the axis XX '.
- the attached accessory can be equipped with a chimney, an external face of which is conjugate with the face parallel to the axis XX 'of the orifice, after introduction of the chimney inside the orifice.
- the chimney of the attached accessory it is advantageous for the chimney of the attached accessory to put the side wall of the orifice in centrifugal radial tension.
- the chimney of the attached accessory is for example equipped with a conical penetration device, the external face of the chimney being radially set back relative to the penetration device.
- the determined perimeter that the skirt has in the transverse plane is for example between 75 and
- the neck has, in the longitudinal plane of the tube, a radius of curvature increasing in a direction from the discharge orifice towards the skirt.
- the invention also relates to a method for producing a flexible tube with integral emptying consisting of a skirt and a head comprising at least one discharge orifice and a neck forming a radial extension of the orifice and connecting to the skirt, the skirt and the neck at least constituting a one-piece assembly, resistant to stress cracking, and forming a water barrier, this process being characterized in that it comprises the steps consisting in: use as a constituent material of the wall a mixture of a number "n" at least equal to 1 of polymers belonging to the family of copolymers-olefins produced from C 2 to C 10 monomers, a first polymer belonging to the family of polypropylenes, the mixture of polymers having a flexural modulus at most equal to 700 MPa, preferably at most equal to 500 MPa, the wall having a thickness between 0.30 and 1.20 mm, preferably between 0.30 and 1.00mm,
- skirt and the head of the tube by injection in a single injection operation of the mixture into an injection mold comprising an imprint and a core, said core comprising a central part of which a free upper end is in centering support on the imprint at least during the injection of the skirt.
- FIG. 1 is a front view of a tube of the invention according to a first embodiment, observed after closing the filling end.
- Figure 2 is a perspective view of the tube of Figure 1.
- Figure 3A is a sectional view of the head of the tube, according to a first embodiment, the head comprising a tip-type fixing means and a reducer, the tube, the tip and the reducer constituting a one-piece assembly formed by injection in one operation.
- FIG. 3B is a sectional view of the head of the tube, according to a second embodiment, the head comprising an attachment type of attachment and a reducer, the tube and the attachment constituting a one-piece assembly formed by injection into a operation, and the reducer being attached.
- FIG. 3C is a sectional view of the head of the tube, according to a third embodiment, the head comprising a fixing means of the end piece forming a reducer, and the end piece being attached.
- Figure 3D is a sectional view of the head of the tube, according to a fourth embodiment, the head comprising a non-removable capsule of the service capsule type, and the non-removable capsule being attached.
- Figure 4 is an enlarged front view of the tube of the invention, according to a first embodiment, before closing the filling end.
- FIG. 4A is a sectional view of the tube shown in FIG. 4.
- Fig 5A schematically represents a mold of the prior art which can be used to form a tube by the injection process.
- FIG. 5B schematically represents a mold usable for injecting the tube of the invention.
- FIG. 6 schematically represents the flow plies during the injection of the tube of the invention.
- Figure 7 is an enlarged perspective view of the part denoted VII in Figure 5B.
- FIG. 8 schematically represents a perspective view of the head of the mold, to be used for injecting the tube of the invention according to a first embodiment.
- FIG. 9 is a sectional view of the head of the tube and of the corresponding zone of the mold, produced according to a first embodiment of the tube, and observed during the phase of injection of the skirt of the tube, along the axis IX -IX of figure 8.
- FIG. 9A is a sectional view of the head of the tube and of the corresponding zone of the mold, produced according to another embodiment and observed during the injection phase of the skirt of the tube, along the same axis IX-IX.
- Figure 10 is a top view of the upper face of the tube when the mold core is in centering support on the cavity of this mold
- Figures 11A, 11B, 11C, and 11D are four sectional views showing four examples assembly of the tube of the invention with an attached accessory, the tubes being in accordance with the embodiments shown in Figures 3A, 3B, 3C and 3D.
- the invention relates to an integral emptying tube provided with a wall resistant to cracking under stress and forming a water barrier.
- Such a tube essentially comprises a flexible skirt 1 and a head 2, the skirt 1 and the neck 4 at least seamlessly connecting to each other and constituting a one-piece assembly.
- the skirt has an elongated shape in an axial direction XX 'and ends with a filling end 121 which, after introduction of the product to be packaged, is closed by crushing this skirt 1, in a transverse direction ZZ'.
- FIGS. 1 and 2 represent a tube, the filling end 121 of which is heat sealed, while FIG. 4 shows the same tube, before filling and welding the end 121.
- the head 2 is represented according to four nonlimiting embodiments in FIGS. 3A, 3B, 3C and 3D. It is located at the end 122 of the tube distant from the filling end 121, and comprises at least one discharge orifice 3 for the conditioned product and a neck 4 which forms a radial extension of the orifice 3 and which is connected to skirt 1, the skirt and the neck at least constituting a one-piece assembly.
- the neck may have a single concavity facing the axis XX 'of the tube as illustrated, or two successive concavities of opposite directions, revealing a reversal of concavity near the discharge orifice 3.
- the invention uses a particular choice of parameters relating to the general shape of the tube, making it possible to use, during the use of the tube, the deformability of the materials used, and more particularly the "shape memory" of the basic material of the invention.
- the first parameter to be taken into account is the connection radius R4 which the neck 4 has in the longitudinal plane Ll which contains the axial direction XX 'and which is perpendicular to the transverse direction ZZ', in the area where the neck 4 connects to the skirt.
- the second parameter to be taken into account is the perimeter C1 which the skirt has in a transverse plane T perpendicular to the axial direction XX 'and situated halfway between the end 123 of the neck 4 forming the discharge orifice 3 and the filling end 121.
- the invention relates more specifically to integral emptying tubes, the ratio C1 / R4 of the perimeter C1 of the skirt to the connection radius R4 of the neck is at most equal to 4.5.
- the skirt 1 also has, throughout the transverse plane parallel to the plane T, a local thickness that is both substantially constant and equal to or very close to the average thickness that this skirt has over its entire length along l 'axis XX'.
- the wall of the tube is composed of a mixture of a number "n" at least equal to 1 of polymers belonging to the family of copolymers-olefins produced from C 2 monomers at C ⁇ 0 , this mixture comprising at least a first polymer belonging to the family of polypropylenes.
- a polypropylene-based tube according to the invention had a shape memory greater than that of a polyethylene tube, this increased shape memory characterized by a faster return to the initial shape after application of a pinch pressure on the tube, in particular at the level of the head of the tube.
- This shape memory is particularly important for integral emptying tubes, that is to say tubes of the type described and illustrated in European patent application EP 1181207, since the return of such tubes to the initial state after pinching is directly dependent on the physical properties of the material and more particularly on the nervousness of the material, while this feedback is spontaneously and easily given by the rigid head in the case of conventional tubes.
- the wall present in the transverse plane T a thickness comprised between 0.30 and 1.2 mm, preferably comprised between 0.30 and 1.00 mm, and the constituent mixture of this wall has a flexural modulus at most equal to 700 MPa, and preferably at most equal to 500 MPa according to standard NF EN ISO 178, the first and second characteristics being jointly necessary for obtaining the optimized return effect previously mentioned .
- a wall is thus obtained having water barrier properties in accordance with the demands of the user industries, and allowing the tube to return to the initial state after pinching, especially in the neck area.
- the mixture constituting the wall of the tube can typically have a flexural modulus of between 100 and 350 MPa, and preferably between 150 and 300 MPa, according to standard NF EN ISO 178.
- Another characteristic of the tube is its length H on the axis XX 'from the filling end 121 to the end 123 of the neck 4 forming the discharge orifice 3 of the tube.
- the invention is particularly applicable to the tube formats in force on the market, and can therefore comply with a length ratio H relative to the diameter between 2.5 and 6, preferably close to 4, for tube capacities typically between 2 ml. and 500ml.
- the length H may therefore be between 40 mm and 170 mm, or even reach 250 mm.
- the determined perimeter C1 presented by the skirt 1 in the transverse plane T is correspondingly greater than 50 mm, 75 mm and 100 mm.
- the invention applies more particularly to large tubes whose circumference C1 is between 75 and 190 mm.
- the tube In the transverse plane T, the tube has a median wall thickness E of between 0.30 mm and 1.20 preferably between 0.30 and 1.00 mm, for a skirt height of between 40 mm and 250 mm respectively, preferably between 40 mm and 200 mm.
- the median thickness E is preferably equal to the square root of the length H, corrected by a multiplicative coefficient between 0.045 and 0.065.
- the multiplicative coefficient is between 0.050 and 0.060, so that:
- the aforementioned first polymer can consist of a copolymer of propylene and ethylene, preferably a heterophasic copolymer of propylene and ethylene.
- Table 1 illustrates the results of flexibility and permeability of tubes produced by injection and the base material of which comprises at least one first polymer from the family of polypropylenes.
- the flexibility results of the tube are illustrated by the value of the flexural modulus.
- the permeability results are relative values compared to a reference of 100 which represents the weight loss of a product packaged in a highly barrier tube, that is to say in accordance with the specifications of the weight loss for a tube with a diameter of 19 mm, with a skirt length of 56 mm before welding, in which a volume of cream of 5 ml has been conditioned.
- the tube previously filled with the product to be tested, welded, closed, is placed in an oven brought to a defined temperature for a period also defined.
- the base 100 previously cited corresponds approximately to a loss in weight of less than 2% for a tube placed in an oven at 50 ° for 14 days or less than 5% for a tube placed in an oven at 45 ° for 56 days.
- flexural module module measured in accordance with standard NF EN ISO 178. This module may differ from the module indicated on the commercial brochures of the polymer manufacturers, for low or very low modules.
- CLYRELL EC 140 P heterophasic copolymer of propylene and ethylene, of flexural modulus indicated * of 740 MPa, of melt index of 16g / 10mn, and marketed by the company BASELL;
- ADFLEX X 500 F heterophasic copolymer of propylene and ethylene, with bending modulus of 470 Mpa according to ISO 178, with a melt flow index of 7.5 g / lOn, density of 0.89 g / cm 3 , and marketed by BASELL;
- ADFLEX C 200 F heterophasic copolymer of propylene and ethylene, with indicated flexural modulus of 220 Mpa according to ISO 178, with a melt flow index of 6g / 10 go, density of 0.890 g / cm 3 , and marketed by BASELL;
- DOXLEX 2035E linear ethylene-octene copolymer, of flexural modulus of 240 Mpa according to standard ASTM D638, of melt flow index of 6g / 10mn, density of 0.919 g / cm 3 , and marketed by the company
- ADFLEX X 100 G heterophasic copolymer of propylene and ethylene, of indicated flexural modulus of 80 MPa, of melt flow index of 8g / 10 min, of density of 0.890g / cm 3 , and marketed by the company BASELL ;
- - AFFINITY EG 8200 linear ethylene-olefin copolymer, with indicated flexural modulus of 20 Mpa according to standard ASTM D790, with a melt flow index of 5g / 10mn, density 0.870g / cm 3 , and marketed by the company DOW;
- EXACT 0210 linear ethylene-octene copolymer, with a flexural modulus of 65 Mpa according to ISO standard 178, with a melt flow index of lOg / lOmn, density of 0.902g / cm 3 , and marketed by the company
- the viscosity index is given in g / lOmn in accordance with standard ISO 1133.
- the flexural module observed by the applicant for this product in Table 1 is the module measured in accordance with standard NF EN ISO 178.
- Table 1 highlights the choices of possible materials depending on the size of the tube and the desired waterproofing objective.
- the measured flexural moduli appearing on the document and the calculated permeability indices fall within the scope of the objectives sought for maximum weight losses, as a function of the tube capacity and the flexibility. of desired wall. It should also be noted beforehand, for any solution studied, the relationship observed between the increase in the flexibility of the wall and the increase in weight loss due to the porosity of the wall.
- the weight losses mentioned in Table 1 are given for information only for a cream given, a given tube, and given conditions for measuring weight loss (oven temperature and observation time).
- the first polymer used belongs to the family of polypropylenes. It is preferably made up of a heterophasic copolymer of ethylene and propylene.
- the most rigid polypropylene belongs to the family of heterophasic copolymers of ethylene and propylene, it is possible to reduce the percentage of the most flexible polymer in the mixture, and therefore reduce the porosity of the wall, for a flexibility objective given.
- the first polymer which is the most rigid of the polymers of the polypropylene family, has in solution 1 a bending modulus indicated of 740 MPa, and measured of 733 MPa, between 850 and 500 MPa, and in solution 2 a bending modulus indicated of 470 MPa and measured of 399 MPa, less than 500 MPa.
- Table 1 shows that the material retained in solution 1 allows, after mixing and for bending modules of the resulting material of the order of 350 MPa, to achieve weight losses of the order of 100 to 130 and therefore to have material which is highly barrier to water.
- the material retained in solution 2 allows, after mixing and for bending modules of the resulting material of the order of 200 MPa, that is to say between 100 and 350 Mpa, preferably between 150 and 300 Mpa , i.e. very flexible for the thickness wall E defined above, to achieve weight losses between 150 and 250, that is to say, registering without reservation in the scale for qualifying the material for large tubes.
- the first polymer was softened by means of a second polymer from the family of polypropylenes or polyethylenes.
- this polymer When the flexural modulus of the second polymer is greater than 70 MPa, this polymer can be incorporated at a rate of 15% to 85% in the mixture, preferably 25% to 75%. Medium-flexible materials with a high water barrier are then obtained.
- a second polymer When looking for a very flexible material, a second polymer is then used whose flexural modulus is less than 70 Mpa. It has been observed in accordance with what is reported in Table 1 that the weight loss of the cream contained in the tube then rises very quickly when the proportion of the second polymer increases sharply. Thus, the percentage of such a polymer in the mixture should be limited to a maximum of 50%, the latter preferably being between 15% and 40%. To limit the percentage of the second polymer in the mixture to less than 50%, a first polymer that is as flexible as possible is preferably used. When trying to favor soft touch, the second polymer belongs to the family of polyethylenes.
- the second polymer belongs to the family of polypropylenes.
- a heterophasic copolymer of propylene and ethylene is preferably used.
- the other selection criteria which can intervene to define the family of the second polymer relate to the secondary barrier effects, of the type ester barrier, oxygen barrier or barrier to any other component of the product contained in the cream as well as the effects of yellowing of the wall under the effect of any component of the product contained in the tube or under the effect of any external contaminant when the tube is used by the consumer.
- melt index measured according to ISO 1133 standard less than 100 g / lOmn, preferably less than 20 g / lOmn.
- the ratio C1 / R4 of the perimeter Cl of the skirt to the radius of connection of the neckline R4 a value less than 3, preferably between 0.5 and 2, so as to improve the return effect while preserving a capacity close to that of equivalent tubes of traditional shape.
- the neck can advantageously have, in the longitudinal plane L1 of the tube, a radius of curvature which increases continuously in a direction going from the discharge orifice towards the skirt.
- the neck 4 may also have, with respect to the axial direction XX ', a maximum inclination A at most equal to 35 °, or even at most equal to 30 °.
- the skirt 1 of the tube can be defined by a generator that is not parallel to the axial direction XX ′ before welding of the end 121, this solution making it possible to increase the radius R4, therefore to decrease the ratio C1 / R4, and consequently improve the comfort of use.
- the generator G of the skirt 1 can have, before welding of the end 121 and relative to the axial direction XX ', a maximum inclination (B) at most equal to 2 °, preferably close to 1 ° or even of 0.5 °, solution which offers the best compromise between reducing the capacity of the tube and improving the comfort of use, in accordance with the drawing shown in Figure 4.
- the generator of the skirt 1 before welding of the end 121 is a straight line, in order to facilitate, in a subsequent operation, the decoration of the tube (offset-screen-printing-thermal transfer or other ). To further enhance the "return" effect provided by the invention, it can be provided (FIG.
- the skirt 1 has, at its point of connection with the neck 4, a substantially constant wall thickness having a first value El substantially constant and substantially identical to the median thickness E in the plane T, that the neck 4 has, in its connection point with the skirt 1, a wall thickness of value El and, near its end 123 closing the orifice 3, a wall thickness having a second value E2 greater than El, and that the thickness of the wall of the neck gradually decreases from E2 to El, from the discharge orifice 3 to a point D of the neck separated from the connection of the neck 4 with the skirt 1 by a distance d not zero.
- the ratio of the second value is preferably, the ratio of the second value
- E2 of the thickness at the first value El of the thickness is at most equal to 2.5, preferably at most equal to 1.5, in accordance with the section plane shown in FIG. 3A.
- the integral emptying tube is covered with a barrier varnish over its entire surface, including the neck 4.
- the tube of the invention is injectable, the head and the skirt being injected in a single operation, using very high injection pressures.
- the pressures used are of the order of 1250 to 2500 bars taking into account the thickness of the wall and the viscosity of the polymers used.
- the wall can be softened simultaneously by the addition of a polymer more or less loaded with ethylene, as described above, but also by the thinning of the wall, in particular during the manufacture of tubes with long skirts.
- the increase in the flow path leads to an increase in the wall thickness and thus, an increase in its rigidity.
- the softening of the wall can then be obtained by an increase in the injection pressure and a reduction in the thickness of the wall.
- the injected materials can withstand injection pressures from 1250 to 2500 bars, the injection being carried out in accordance with the rules of the art, these pressures are used to reduce the thickness of the wall of the tube and increase the flexibility without reducing the flexural module, thus limiting the degradation of weight loss.
- Certain tubes are injected into a mold as shown in FIG. 5A and composed of a core denoted 6 and an imprint denoted 7 in which the injection nozzle denoted 9 is registered, that is to say the channel by which the molten plastic material is led into the cavity defined by the impression and the core.
- the core of the mold tends to flex towards the imprint. This results in a wall of variable thickness and therefore of variable flexibility.
- a first injection mold to obtain this result is that of the type shown in FIG. 5B.
- this mold comprises a central part denoted 10.
- the central part 10 of the core 6 has a free end denoted 11 which is in centering support on the imprint 7.
- three independent plies of material 33 are created, supplied by the three streams of material 32, corresponding to the three channels 12, the plies being connected together by three weld lines 36 and forming the skirt of the tube at the end of the injection operation.
- Another solution consists in decentring the injection point 15, for example without limitation, by splitting it, and by placing each injection point in the extension of the wall 29 parallel to the axis XX ', at the end 122 of the tube.
- the invention specifies the details of the shape of the tube and the corresponding methods which make it possible to attenuate the weld lines while retaining the essential support of the core on the imprint.
- the shape details of the tube and the corresponding mold will now be described with reference to FIGS. 8, 9, 9A and 10.
- the end 122 of the tube is formed at least of sectors 32 corresponding to the channels 12 produced in the free end 11 of the central part 10 of the core, in accordance with FIG. 10.
- connection line as wide as possible between each radial injection channel and the upper part of the tube head in accordance with Figure 10.
- An advantageous solution consists in providing cumulative connection widths of the sectors 32 at the connection point 18 with the face 29 parallel to the axis XX 'of the orifice 3 representing at least 15% of the perimeter of the face 29.
- Another solution further improving the annular supply, but reducing the bearing surface of the core on the cavity, consists in increasing the cumulative widths of connection of the supply sectors at the connection point 18 with the face 29 to more than 25 % of the perimeter of the wall.
- annular throttling zone Z situated on the wall of the orifice, beyond the zone of connection of the sectors 32.
- the wall of the end 122 of the tube shown in nonlimiting example in FIG. 10, in projection on a plane perpendicular to the axis XX ′, consists of the sectors 32 corresponding to the supply channels 12 shown in FIG. 8.
- the wall 122 is therefore perforated in the sectors 34 which correspond to the bearing zones 14 of the free end 11 of the central part 10 on the cavity 7.
- the central part 10 of the core 6 can be made to move relative to the core peripheral and form without aperture the top wall 122 of the tube by moving back the movable central part 6 of the core, by a distance corresponding to the desired thickness of this top wall.
- the free end 11 of the central part 10 of the core is drawn in the shape of a returning cone, the angle ⁇ of the bearing surface of the free end 11 of the central part 10 on the imprint 7 with the plane perpendicular to the longitudinal axis XX 'of the tube being less than 45 °, preferably between 15 ° and 20 °, to provide optimal comfort to the consumer.
- This version is suitable for small tubes. It is more difficult to implement for large tubes. Indeed, for a large tube, the length of the central part 10 of the core and the nature of the steels retained are such that the central core compresses under the injection pressure between 1200 and 2500 bars so that the centering cannot be ensured with a support slope between 15 ° and 20 °, a support slope between 35 ° and 45 ° being necessary to compensate for the compression of the core.
- the free end 11 of the central part 10 is in the form of a protruding truncated cone, the angle ⁇ formed by the bearing surface of the protruding truncated cone on the imprint 7 with the plane perpendicular to the longitudinal axis XX 'of the tube being between 35 ° and 45 °.
- the free end 11 of the central part 10 is in the form of a cone returning in its internal part to the protruding truncated cone, the angle ⁇ of the bearing surface of the cone returning from the free end 11 of the central part 10 on the imprint 7 with the plane perpendicular to the longitudinal axis XX 'of the tube being less than 45 °, preferably between 15 ° and 20 °.
- 122 is in the form of a truncated cone projecting in its peripheral part and in the form of a bowl in its central part.
- the shape given to the end 122 of the tube simultaneously makes it possible to optimize the centering of the core during the injection operation and to offer optimal comfort of use to the consumer.
- the head of the tube comprises a one-piece fixing means of tip type 5 and a one-piece reducer 9, the tip and the reducer being located in the extension of the 'orifice 3 on the axis XX', the top wall 122 of the tube forming the reducer 9, the orifice 8 of the reducer being obtained by cutting, after forming the tube by injection, the tube, the nozzle and the reducer thus constituting a one-piece assembly formed by injection in one operation.
- a first solution consists in joining the tube and the capsule by means of a screw connection for example.
- the head of the one-piece tube being made of the same flexible and elastic material as the skirt, the material of which the head is made and in particular the pitch of the screw can creep under the effect of the force resulting from the tightening of the capsule on the tube.
- the thread of the screw thread 19 is a gunner type thread, in accordance with the drawings of FIGS. 3A, 9, and 9A.
- the seal is ensured by means of a conical pin 27, disposed on the sealing means 35, the seal being ensured by centrifugal radial tensioning 25 of the wall of the one-piece reducer 9 during the penetration of the pin 27 into the opening orifice 8 of the reducer, as shown in FIG. 11A.
- the support of the plugging means on the tube is ensured by means of a support ring 28 situated at the internal periphery of the plug 35 and bearing on the peripheral zone of the reducer.
- the head comprises a one-piece attachment means of tip type 5 located in the extension of the orifice 3 on the axis XX ′, the tube and the fixing means 5 constituting a one-piece assembly produced in an injection operation as shown in FIG. 3B, the head being able to be fitted with an accessory attached to the attached reducer or cannula type.
- the head is fitted with an attached accessory of the type of distribution of the attached reduction gear type or added cannula or other, fixing means of the screw-tip type or the like, sealing means of the service capsule type or the like, as shown without limitation in Figures 3C and 3D.
- the head is equipped with the attached accessory forming an add-on reducer 36, an add-on end forming a reducer 37, a service capsule 38, the add-on accessory being located in the extension of the orifice 3 on axis XX ', the accessories 36, 37 and 38 constituting nonlimiting examples.
- the invention preferably provides that the accessory is equipped with a chimney 21, the external face of which is combined with the face 29 parallel to the axis XX 'of the orifice 3, after introduction of the chimney 21 inside the orifice 3, to secure the attachment of the accessory to the tube, the chimney putting in centrifugal radial tension the wall 29 of the orifice.
- the wall of the tube of the invention being made of a flexible material, the solution described allows to avoid yawning, or, more seriously, a leak or a disassembly of the tube and the attached accessory when the consumer presses on the wall of the tube.
- the proposed solution takes advantage of the flexibility of the material of the invention to ensure the holding of the accessory.
- the chimney 21 is equipped with a conical device 22 to effect its introduction into the orifice 3. More preferably, the external face of the chimney 21 is radially set back 23 from the device 22, the counter - undercut 23 blocking the accessory attached in the axis XX ', the attached accessory then being non-removable.
- the tube and the attached accessory have combined means to seal the assembly and possibly prohibit the rotation of the attached accessory relative to the tube.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Tubes (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2004800063363A CN1759047B (zh) | 2003-01-24 | 2004-01-14 | 具有防止应力破裂并形成防水层的壁部的可完全排空的管和制造这种管的方法 |
EP04701983A EP1585681A1 (fr) | 2003-01-24 | 2004-01-14 | Tube souple, a vidage integral et effet retour amplifie |
JP2005518708A JP2006515824A (ja) | 2003-01-24 | 2004-01-14 | 拡張された回復効果(returneffect)を有する完全に空にできる柔軟性チューブ |
US10/542,935 US7695789B2 (en) | 2003-01-24 | 2004-01-14 | Fully emptiable flexible tube with an amplified return effect |
DE04701983T DE04701983T1 (de) | 2003-01-24 | 2004-01-14 | Vollständig entleerbarer flexibler schlauch mit verstärkter rückkehrwirkung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0300820A FR2850363B1 (fr) | 2003-01-24 | 2003-01-24 | Tube souple a vidage integral et a effet retour amplifie |
FR03/00820 | 2003-01-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004074126A1 true WO2004074126A1 (fr) | 2004-09-02 |
Family
ID=32669212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2004/000061 WO2004074126A1 (fr) | 2003-01-24 | 2004-01-14 | Tube souple, a vidage integral et effet retour amplifie |
Country Status (7)
Country | Link |
---|---|
US (1) | US7695789B2 (fr) |
EP (1) | EP1585681A1 (fr) |
JP (1) | JP2006515824A (fr) |
CN (1) | CN1759047B (fr) |
DE (1) | DE04701983T1 (fr) |
FR (1) | FR2850363B1 (fr) |
WO (1) | WO2004074126A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007091274A (ja) * | 2005-09-29 | 2007-04-12 | Takashi Shimizu | チューブ容器とその製造方法 |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050247727A1 (en) * | 2004-05-07 | 2005-11-10 | Mahurin Darrell W | Hand operated fluid delivery device |
FR2873657B1 (fr) * | 2004-07-29 | 2006-11-17 | Cep Ind Sa | Tube de conditionnement a zone de marquage etendue |
EP1802532A1 (fr) * | 2004-10-20 | 2007-07-04 | Bormioli Rocco & Figlio S.p.A. | Tube monobloc produit par injection de matiere plastique |
US20060286324A1 (en) * | 2005-06-17 | 2006-12-21 | Achim Helmenstein | Plastic package |
FR2905953B1 (fr) * | 2006-09-19 | 2012-11-02 | Cep Tubes | Materiau thermoplastique pour la fabrication d'articles tubulaires souples presentant au moins une soudure |
US8906187B2 (en) * | 2008-06-25 | 2014-12-09 | Colgate-Palmolive Company | Method of making shoulder/nozzles with film barrier liners |
US11122940B1 (en) * | 2020-07-17 | 2021-09-21 | George Joseph Winn | Wrist-worn sanitizer dispenser |
CN112052536B (zh) * | 2020-08-20 | 2024-02-20 | 巴恩斯注塑工业(江苏)有限公司 | 一种薄壁类产品注塑时型芯偏移量的控制方法 |
US20240132707A1 (en) * | 2022-10-05 | 2024-04-25 | Ticona Llc | Fiber-Reinforced Propylene Composition Having Ultralow Emissions |
WO2024189549A1 (fr) * | 2023-03-13 | 2024-09-19 | Aisapack Holding Sa | Emballage doté d'un support de capuchon encliqueté étanche |
Citations (3)
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EP0856473A1 (fr) * | 1997-02-04 | 1998-08-05 | L'oreal | Matériau thermoplastique souple et tube compressible constitué de ce matériau |
WO2000064769A1 (fr) * | 1999-04-23 | 2000-11-02 | Cep Industrie | Tube a vidage integral |
FR2806385A1 (fr) * | 2000-03-17 | 2001-09-21 | Cep Ind | Tube souple, resistant a la fissuration sous contrainte et impermeable a la vapeur d'eau |
Family Cites Families (7)
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BE791879A (fr) * | 1971-11-25 | 1973-05-24 | Scal Gp Condit Aluminium | Procede de fabrication de tubes souples coniques |
JP2771024B2 (ja) * | 1990-08-30 | 1998-07-02 | 関西チューブ 株式会社 | 肩部バリヤー性の向上したラミネートチューブ容器 |
DE69311497T2 (de) * | 1992-10-26 | 1997-11-06 | Mitsui Petrochemical Ind | Zusammendrückbarer rohrförmiger Behälter und Verfahren zu seiner Herstellung |
US5314746A (en) * | 1992-11-12 | 1994-05-24 | Quantum Chemical Corporation | Soft, puncture- and tear-resistant polyolefin films |
WO1998059002A1 (fr) * | 1997-06-24 | 1998-12-30 | Borealis A/S | Copolymere de propylene heterophase et son procede de preparation |
NL1013520C2 (nl) * | 1999-07-19 | 2001-01-22 | Dsm Nv | GeÙxtrudeerd polyolefine vormdeel. |
WO2001094213A2 (fr) * | 2000-06-07 | 2001-12-13 | Loctite (R & D) Limited | Ensemble buse a fermeture autocassable reutilisable, recipient pourvu de cet ensemble, et emballage a cet effet |
-
2003
- 2003-01-24 FR FR0300820A patent/FR2850363B1/fr not_active Expired - Lifetime
-
2004
- 2004-01-14 EP EP04701983A patent/EP1585681A1/fr not_active Withdrawn
- 2004-01-14 US US10/542,935 patent/US7695789B2/en not_active Expired - Fee Related
- 2004-01-14 JP JP2005518708A patent/JP2006515824A/ja active Pending
- 2004-01-14 DE DE04701983T patent/DE04701983T1/de active Pending
- 2004-01-14 WO PCT/FR2004/000061 patent/WO2004074126A1/fr active Application Filing
- 2004-01-14 CN CN2004800063363A patent/CN1759047B/zh not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0856473A1 (fr) * | 1997-02-04 | 1998-08-05 | L'oreal | Matériau thermoplastique souple et tube compressible constitué de ce matériau |
WO2000064769A1 (fr) * | 1999-04-23 | 2000-11-02 | Cep Industrie | Tube a vidage integral |
EP1181207B1 (fr) * | 1999-04-23 | 2003-08-27 | CEP Industrie | Tube a vidage integral |
FR2806385A1 (fr) * | 2000-03-17 | 2001-09-21 | Cep Ind | Tube souple, resistant a la fissuration sous contrainte et impermeable a la vapeur d'eau |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007091274A (ja) * | 2005-09-29 | 2007-04-12 | Takashi Shimizu | チューブ容器とその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
FR2850363A1 (fr) | 2004-07-30 |
US7695789B2 (en) | 2010-04-13 |
EP1585681A1 (fr) | 2005-10-19 |
CN1759047A (zh) | 2006-04-12 |
US20060204693A1 (en) | 2006-09-14 |
JP2006515824A (ja) | 2006-06-08 |
CN1759047B (zh) | 2011-04-27 |
DE04701983T1 (de) | 2006-04-13 |
FR2850363B1 (fr) | 2006-04-14 |
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