EP3027534B1 - Dispositif de stockage souple comprenant un recipient souple et une doublure interne, méthode pour sa fabrication et son utilisation - Google Patents

Dispositif de stockage souple comprenant un recipient souple et une doublure interne, méthode pour sa fabrication et son utilisation Download PDF

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Publication number
EP3027534B1
EP3027534B1 EP14790140.9A EP14790140A EP3027534B1 EP 3027534 B1 EP3027534 B1 EP 3027534B1 EP 14790140 A EP14790140 A EP 14790140A EP 3027534 B1 EP3027534 B1 EP 3027534B1
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EP
European Patent Office
Prior art keywords
perforations
inner liner
micro
container
microns
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.)
Active
Application number
EP14790140.9A
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German (de)
English (en)
French (fr)
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EP3027534A2 (fr
Inventor
Jean-Pierre Lecocq
Nicolas Chevalier
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.)
So Bag
Roquette Freres SA
Original Assignee
So Bag
Roquette Freres 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
Priority claimed from FR1357723A external-priority patent/FR3009290B1/fr
Application filed by So Bag, Roquette Freres SA filed Critical So Bag
Priority to PL14790140T priority Critical patent/PL3027534T3/pl
Priority to RS20170951A priority patent/RS56376B1/sr
Publication of EP3027534A2 publication Critical patent/EP3027534A2/fr
Application granted granted Critical
Publication of EP3027534B1 publication Critical patent/EP3027534B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65D88/00—Large containers
    • B65D88/16—Large containers flexible
    • B65D88/1612—Flexible intermediate bulk containers [FIBC]
    • B65D88/165—Flexible intermediate bulk containers [FIBC] with electrically conductive properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
    • B26F1/06—Perforating by punching, e.g. with relatively-reciprocating punch and bed with punching tools moving with the work
    • B26F1/10—Roller type punches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/24—Perforating by needles or pins
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3888—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation wrappers or flexible containers, e.g. pouches, bags
    • 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
    • B65D88/00—Large containers
    • B65D88/16—Large containers flexible
    • B65D88/1612—Flexible intermediate bulk containers [FIBC]
    • B65D88/1618—Flexible intermediate bulk containers [FIBC] double-walled or with linings
    • 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
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • 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
    • B65D88/00—Large containers
    • B65D88/74—Large containers having means for heating, cooling, aerating or other conditioning of contents
    • B65D88/741—Large containers having means for heating, cooling, aerating or other conditioning of contents aerating by ambient air through openings in the wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/002—Flexible containers made from webs by joining superimposed webs, e.g. with separate bottom webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/30—Shape of flexible containers pointed or tapered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2170/00—Construction of flexible containers
    • B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/146—Cutting, e.g. perforating, punching, slitting or trimming using tools mounted on a drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/148—Cutting-out portions from the sides of webs or sheets

Definitions

  • the invention relates to a flexible storage device comprising a flexible container and an inner liner.
  • the field of the invention is that of flexible intermediate bulk containers (abbreviated to GRVS), and or FIBC (of the English “ Flexible Intermediate Bulk Container”) still commonly called “ Big Bag “.
  • the container is generally of parallelepipedal shape, with a capacity generally ranging from 0.5 to 3 m 3 .
  • This container is a flexible structure whose mechanical strength allows to take up the load of stored materials.
  • the container is conventionally obtained from fabric of polymer fibers (PP, PE, PET, etc.), which is often permeable to products of small particle sizes.
  • PP polymer fibers
  • PE polymer fibers
  • PET PET
  • an internal protective coating in IEC 61340 4-4 Edition 2.0.
  • FIBCs are classified into one of four types: Type A, Type B, Type C, and Type D.
  • type B FIBCs are made of plastic to avoid certain landfills and landfills, without the need for grounding.
  • Such FIBCs are suitable for explosive atmospheres formed of fine particles in suspension, but are not suitable for gaseous explosive atmospheres.
  • Type C FIBCs are designed with conductive, cloth or plastic foil or interwoven with conducting wires or filaments, and are designed to prevent the occurrence of incendiary sparks, discharge and the propagation of certain discharges. In such a type C FVC, superior protection is obtained against the risk of explosion compared to a type B FVC.
  • Type C FIBCs are suitable for explosive atmospheres consisting of fine particle clouds in suspension, and also, for explosive atmospheres of gaseous nature.
  • this protection is only ensured if the conductive sheet or equivalent is connected to the ground, at least during filling and emptying operations.
  • D-type FIBCs are made of a static-protected fabric designed to prevent the occurrence of sparks and certain discharges, without the need to connect the FIBC to the earth.
  • type B, C or D FIBCs use type L2 internal protective coatings according to the aforementioned standard, with materials having a surface resistivity of between 1.0 ⁇ 10 9 ⁇ and 1.0. ⁇ 10 12 ⁇ .
  • Such materials, dissipative effect, include antistatic additives whose effect is however of limited duration in time. The life of such an interior liner does not exceed 2 years.
  • these additives are likely to migrate and come into contact with the stored product, and thus contaminate it. This is a problem often considered unacceptable in the case of use of the storage device for food applications, and especially pharmaceutical. Therefore, to the knowledge of the inventor, to the knowledge of the inventor, those skilled in the art, for these sensitive applications, almost always use a Type C FVC, without an L2 type liner, which is preferably coated. L1 requiring grounding.
  • the storage device of this prior art does not meet the criteria for being classified as a type B large flexible bulk container according to the standard 61340-4-4 Edition 2.0 2012-01 in that it comprises a conductive layer of the electricity.
  • the protection vis-à-vis the risk of explosion is ensured only if the conductive layer of this anteriority is electrically connected to the earth.
  • the inner liner is the film of Basell Polyolefins under the mark " ADLFEX Q 100 F ".
  • the choice of this specific material would allow according to page 1, column 2, to satisfy a breakdown voltage of less than 4kV. It should be noted that, in all the tests provided, the thickness of the film which is 1.5 mill PP (or 38 micro-meters) corresponds to a very small wall thickness for an inner lining, close to the thickness wall for which this breakdown voltage limit is always satisfied.
  • micro-perforations are gas permeable and normally impermeable to stored materials.
  • the object of the present invention is to provide a device for the storage of powdery products, providing effective protection against the risk of explosion, especially during emptying operations and / or filling the bag.
  • the object of the present invention is to provide such a device which does not require grounding during the emptying and / or filling operations to comply with the safety conditions.
  • Another object of the present invention is to provide such packaging which does not expose the stored product to the risk of contamination by migration of the container to the contents.
  • Another object of the present invention is to provide such a package which provides protection against the risk of explosion, preferably without the packaging being dependent on a particular material for the inner liner.
  • the invention relates to a package comprising a flexible bulk container, the material of the container being an insulator, without antistatic additive, or conductive layer electricity, as well as an insulating inner lining, of surface resistivity greater than 1.0 ⁇ 10 12 ⁇ , covering the internal walls of the container, without a conductive layer of static electricity and without dissipative layer of the 'static electricity.
  • the inner lining comprises micro-perforations, passing through, distributed over the entire surface of the inner lining and in such a way that the breakdown voltage of the inner lining is less than 4 kV and that the voltage of breakdown of the container wall is less than 6 kV, without requiring the grounding of the device.
  • the fabric of the flexible bulk container is an air permeable fabric, preferably non-laminated and uncoated, so as to allow deaeration of the package through micro-perforations of the inner liner and the web of said container.
  • the storage device finds particular application as a large flexible bulk container type B, according to IEC 61340-4-4 Edition 2.0 2012-01.
  • the invention also relates to a method of manufacturing a storage device according to the invention in which the micro-perforated internal lining is obtained from an inner liner, not perforated, and by means of a perforating device comprising at least one roller provided on its circumference needles, rotated about its axis and rolling on the inner liner perforating it.
  • the perforation device comprises two counter-rotating rolls, each provided with needles on its circumference, driven in opposite rotations, the two rollers rolling on the inner liner perforating it.
  • micro-perforations are made from a bellows duct, directly in the bellows duct, when the duct is flat, in the form of a band.
  • Said device comprises a container 2, for flexible bulk, and an inner liner 3.
  • the container 2 forms a flexible structure whose mechanical strength allows to resume the charge of the stored material.
  • the container 2 may be of substantially parallelepipedal shape, with a capacity of between 0.5 m 3 and 3 m 3 , by way of non-limiting example.
  • this structure can be provided with handling straps 5 at the corners of the structure.
  • This structure may consist essentially of canvas, synthetic, especially based on polypropylene.
  • the internal lining is an insulator, that is to say a surface resistivity greater than 1.0 ⁇ 10 12 ⁇ , on its inside and outside, according to IEC 61340-4-4 Edition 2.0 2012- 01.
  • the inner liner is a type L3 inner protective coating according to the aforementioned standard.
  • This inner liner 3 is devoid of electrically conductive layer.
  • Electrically conductive layer means any element, for example in sheet or filament form, having a surface resistivity of less than 1.0 ⁇ 10 7 ⁇ .
  • such an inner liner 3 and more generally the storage device 1 as a whole does not require grounding, particularly during operations. filling or emptying the device with the powdery materials.
  • the inner liner 3 is devoid of dissipative layer of static electricity.
  • Dissipative layer is understood to mean a material whose surface resistivity is between 1.0 ⁇ 10 9 ⁇ and 1.0 ⁇ 10 12 ⁇ and which comprises for this purpose, conventionally, antistatic additives that may contaminate the material. stored.
  • such contamination risks are avoided in that the inner liner is devoid of such additives, for example an untreated plastic material.
  • the inner liner 3 is constituted by a single film of material having said micro-perforations 4, untreated plastic material, such as for example polypropylene or polyethylene (PE).
  • the inner liner may comprise several layers of different insulating materials, for example several plastics.
  • the internal double 3 is a multilayer (ie double layer, triple layer, see more) of the same plastic, PE for example, to increase the mechanical performance of the inner liner 3.
  • the inner liner can be a multilayer (ie double layer, triple layer, see more) of several different insulators, such as several different plastics. This multilayer is obtained by extrusion, in particular coextrusion.
  • the thickness ⁇ of the inner liner 3 is greater than 60 microns and less than or equal to 700 microns, for example between 90 microns and 500 microns (microns).
  • the inner liner 3 covers the inner walls of the container 2, said inner liner 3 comprising micro-perforations 4 through.
  • micro-perforations 4 are distributed over the entire surface of the inner liner 3 and such that the breakdown voltage of the inner liner 3 is less than 4 kV. In addition and according to the invention, the breakdown voltage of the container wall is less than 6 kV.
  • Such a storage device 1 can be considered as a large container for flexible bulk classified type B according to IEC 61340-4-4 Edition 2.0 2012-01.
  • the breakdown voltage of the entire container 2 / inner liner 3 is less than or equal to 6 kV, and preferably less than or equal to 4 kV.
  • the micro-perforations 4 are distributed over the entire surface of the inner liner 3, and not on a part of its surface only, and in such a way as to avoid strong accumulations of electrostatic charges on the inner liner 3.
  • the density of the micro-perforations 4 on the surface of the inner liner 3 is such that two neighboring micro-perforations are separated by a distance ⁇ less than or equal to 2 cm, preferably between 0.5 cm and 1.5 cm. cm.
  • the maximum surface having no micro-perforations should not exceed a disc of 2.5 cm in diameter, or a disc of 2 cm in diameter.
  • the diameter d of micro-perforations 4 is between 5 microns and 130 microns, and for example between 5 microns and 40 microns (microns).
  • the diameter of the micro-perforations 4 will be chosen according to the particle size of the material to be stored and in order to prevent the material from passing through the inner lining 3.
  • the micro-perforations 4 are preferably of diameter less than the particle size of the material to be stored.
  • These micro-perforations of the inner liner 3 may be obtained mechanically, for example by means of a matrix provided with needles for perforating the liner, or by means of a roller provided on its circumference with such needles, provided to roll on the lining by perforating it.
  • the material of the container 2, in particular the web 20 of the container, is an insulator within the meaning of the aforementioned standard, for example based on polypropylene, without antistatic additive, nor electrically conductive layer.
  • the fabric 20 is a coated canvas, or a laminated canvas.
  • the fabric 20 of the flexible bulk container is an air permeable fabric, preferably unlaminated and uncoated, so as to allow the deaeration of the device 1 by means of micro-perforations. 4 of the inner liner 3 and, through the web 20, said container 2, in particular during the filling operations of the device with the materials. Such a phenomenon is illustrated by the arrows at the figure 2 .
  • Such de-aeration makes it possible to minimize the quantity of fine particles suspended in the air during the filling operations, and thus to limit the risks of creating an explosive atmosphere.
  • Such an arrangement contributes, with the minimization of breakdown voltages of the inner liner 3 and the container, to a better safety vis-à-vis the risk of explosion during filling operations of the device with powdery materials.
  • Example 1 Test of breakdown voltage on perforated inner lining, only
  • This liner has an average thickness of 90 microns ( ⁇ m) and is insulating in the sense of the IEC 61340-4-4 Edition 2.0 2012-01 standard, that is to say with a surface resistivity greater than 1.0 ⁇ 10 12 ⁇ .
  • This inner lining was micro-perforated over its entire surface with a perforation density equal to 0.3 perforation per cm 2 .
  • the distribution of the perforations is homogeneous (uniform), and obtained by means of a perforating device using a roller 40 provided on its circumference with needles intended to completely cross the thickness of the inner liner.
  • This roller 40 makes it possible to perforate the inner lining, when animated with a rotation about its axis, by rolling on the inner lining.
  • the needles are distributed over the roll 40, along a plurality of generatrices of the roll (the roll), that is to say along a plurality of straight lines parallel to the axis of the roll and passing through the cylindrical surface of the roll, the lines being offset regularly, angularly, around the axis of the roll.
  • the needles of the same generator are distributed in the direction of the generator, parallel to the axis of the roller, with a constant gap between any two successive needles of the line.
  • the needles of a generator are arranged in staggered relation to the needles of the neighboring generator.
  • the diameter of the needles is 0.79 mm, which makes it possible, given the elasticity of the material and the associated shrinkage phenomenon, to obtain micro-perforations in the diameter lining, referenced "X", of between 0.1 mm. and 0.4mm. Indeed, when the needles emerge from the inner liner, the material tends to retract by closing the micro-perforations created.
  • FIG. figure 4 The arrangement of the micro-perforations thus created on the lining is illustrated in FIG. figure 4
  • the micro-perforations are distributed along a plurality of parallel lines, spaced successively by a dimension T2, equal to 20 mm.
  • the micro-perforations are regularly spaced, two successive micro-perforations being spaced apart by a dimension T1, equal to 20 mm.
  • the perforations of two successive lines are arranged in staggered rows, as illustrated.
  • This perforated internal lining was subjected to a breakdown voltage measurement by Swissi Process Safety GmbH in Basel, on behalf of the present applicant, carried out in the electrostatic laboratory, under the seal of confidentiality.
  • the breakdown voltage was measured with a high voltage device according to EN 60243 and IEC 61340-4-4 Ed.2. This measurement was obtained in a climatic chamber at a temperature of 23 ° C and with a humidity of 20%, in accordance with IEC 61340-4-4 Ed.2.
  • the measured breakdown voltage is 1.3 kV ( ⁇ 0.1). This test was the subject of a confidential report between the applicant and Swissi Process Safety GmbH.
  • This breakdown voltage of the inner liner is much lower than the maximum allowable breakdown voltage (4kV) to be met by the inner liner to meet the definition of a Class B flexible bulk container according to the 61340-4-4 standard. Edition 2.0 2012-01.
  • Example 2 FIBC qualification test according to the classification of the standard 61340-4-4 Edition 2 2012-01
  • Tests were carried out on a storage device according to the invention, more particularly a large flexible bulk container (FIBC) as illustrated in FIG. figure 6 .
  • FIBC large flexible bulk container
  • This FIBC comprises a container 2, made of polypropylene fabric and manufactured flat.
  • the body of the container comprises a bottom wall 21, flat bottom, side walls 22 to 25, substantially rectangular, and a roof 26, frustoconical shape.
  • the body of the container is obtained by assembling three webs 20a, 20b and 20c sewn together by their edges.
  • the template of the canvas 20a is illustrated at figure 10a , this fabric forming the bottom wall 21 and two side walls 23,25, opposite, and partially the roof 26. In the FIBC this fabric is folded generally U.
  • the size of the canvases 20b and 20c is illustrated in FIG. figure 10b .
  • These two webs 20b and 20c are intended to constitute respectively the other two opposite side walls 22,24 of the FIBC.
  • the polypropylene used for the webs 20a, 20b and 20c forming the side walls, the bottom and the roof have a minimum grammage of 165 g / m2.
  • the dimensions of the container body are approximately 95x95x115 (cm).
  • Four loop-shaped gripping straps 5 are stitched respectively at the vertical edges 30 of the container 2.
  • This FIBC also comprises an external filler neck 27 and a discharge chute 28.
  • This flexible trough is made of fabric, more particularly polypropylene having a basis weight of 75 g / m 2 minimum.
  • This filling chute 27 is fixed by sewing between the roof 26 and the chute.
  • the free end of this filler neck 27 is intended to be mounted on a feed opening pipe of a filling device (not shown).
  • This filler neck 27 makes it possible to drive (without loss) the materials, from the supply opening of the filling device to the interior volume of the body of the container 2. It is extended by an internal filler neck (no shown).
  • a closure link, marked 32, located at the bottom, allows to close on itself the filler neck 27, once the filling operations completed.
  • the flexible discharge chute 28 extends from a central opening 29 on the bottom wall 21, sewn to the latter. It allows to drive the materials to empty when open at the top. Otherwise this discharge chute 28 is closed on itself by means of a closure link 33, flexible, provided at the seam between the bottom and the chute. Once this flexible link 33 tight, the emptying chute 28 is closed.
  • the flexible discharge chute 28 When not in use, the flexible discharge chute 28 can be folded on itself and grouped together on the underside of the bottom wall 21 by means of a protection bolster 34, equipped with a clamping link 35.
  • the protective purse 34 made of polypropylene fabric, is a tubular part fixed at its upper part by stitching to the bottom wall 21, the tubular part surrounding the emptying chute 28 over only a part of height. This protection burs 34 makes it possible to maintain and compress the discharge chute between the bottom wall 21 and the purse 34, when the clamping link 35 disposed at its lower end is actuated.
  • the storage device also includes a preformed internal liner.
  • This inner liner covers the body of the container, namely the side walls 22 to 25, the bottom wall 21 and the roof 26.
  • This inner liner of average thickness of 90 microns also extends over the filler neck 27 and on the discharge chute 28 and is made of polyethylene.
  • this inner lining is micro-perforated over its entire surface, with a perforation density of 1.6 perforations per cm 2 .
  • the two rollers 50 are each identical to that illustrated in FIGS. Figures 7a and 7b .
  • the needles are distributed, according to several circular lines Lc, circular grooves G, contained in planes parallel to the circular lines, being provided in depth of the cylindrical surface of the roll, at least between the circular lines and in the same number as the lines d Lc needles.
  • the perforation device results from the combination of two rollers according to the Figures 7a and 7b , counter-rotating, axes parallel to each other, the two needle rollers being arranged relative to each other interpenetratingly: more particularly and as illustrated in FIG. figure 9b , the needles of each roller penetrate the circular grooves in depth of the cylindrical surface of the other roll, at the interface area between the two rollers.
  • two successive circular lines of needles are separated by a distance T4 equal to 16 mm.
  • two successive needles are separated by a distance T3 equal to 8 mm.
  • the density of the micro-perforations on the lining is 1.6 perforation per cm 2 .
  • the diameter of the needles is 0.62 mm, which makes it possible to create perforations with a diameter of between 0.08 mm and 0.32 mm, given the phenomenon of retraction.
  • the breakdown voltage was measured with a high voltage device according to EN 60243 and IEC 61340-4-4 Ed.2. This measurement was obtained in a climatic chamber at a temperature of 23 ° C and with a humidity of 20%, in accordance with IEC 61340-4-4 Ed.2. The voltage measurement is 1000V.
  • the roof consisting of the trapezoid-shaped parts of the three canvases 20a, 20b and 20c, was not specifically measured as this measure would depend on where it was made and would be redundant.
  • the storage device may be of the type of that exemplified above, the container forms a body comprising a bottom wall 21, four side walls 22 to 25 and a roof 26, said device comprising a chute of filling 27, flexible, fixed to the roof 26, in particular of truncated pyramid or frustoconical shape, extending from a roof opening, outside the body, and a discharge chute 28 , flexible, extending from an opening of the bottom wall 21, outside the body.
  • the body of the container may consist of three webs 20a, 20b, 20c of the type illustrated in FIGS. Figures 10a and 10b .
  • Other fabrications are possible, for example by providing a separate fabric for each roof wall, bottom or side.
  • the filler neck 27 and the discharge chute 28 are typically provided with their closure links 32 and 33.
  • the device may comprise said purse 34, with its clamping link 35, the function of which has been described above.
  • the micro-perforated inner liner 3 covers not only the inner walls of the container body but also the inner wall of the filler neck 27 and the inner wall of the discharge chute 28.
  • the possibility offered by the micro-perforations 4 to deaerate the interior volume of the device by allowing air to pass through these micro-perforations, or even the permeable fabric of the body of the container, including in particular the fabric chutes, is particularly advantageous and contributes to a better safety vis-à-vis the risk of explosion during filling operations of the device with powdery materials.
  • the material of the fabric of the container and / or the inner liner may be a plastic selected from polypropylene or polyethylene.
  • the distribution of micro-perforations 4 on the inner liner is preferably uniform.
  • the micro-perforations 4 are arranged in parallel lines, the micro-perforations of each line being separated by a constant distance between any two successive micro-perforations of the line.
  • the perforations of two lines successive ones are arranged in staggered relation to each other. According to another alternative, they can be aligned.
  • the distance T1 between two micro-perforations of a line and the distance T2 separating two successive lines of perforations can each be between 5 mm and 20 mm.
  • the distances T1 and T2 may be different or equal.
  • the invention also relates to a method of manufacturing a storage device according to the invention.
  • the micro-perforated inner lining is obtained from a non-perforated inner lining and by means of a perforation device comprising at least one roller provided on its circumference with needles (substantially radial), rotated around its axis and rolling on the inner lining by perforating it.
  • the perforating device may comprise two counter-rotating rollers, each provided with needles on the circumference, rotated in opposite rotations and rolling on the non-perforated liner by perforating it.
  • the rollers 50 may be those of the type illustrated in FIGS. Figures 7a and 7b .
  • the needles are distributed, along several circular lines Lc, circular grooves G, contained in planes parallel to the circular lines Lc, being provided in depth of the cylindrical surface of the roll, at least between the circular lines Lc and the same number as the lines of needles Lc.
  • the perforation device results from the combination of two rollers according to the Figures 7a and 7b , counter-rotating, axes parallel to each other, the two needle rollers being arranged relative to each other interpenetratingly: The needles of each roller penetrate into the circular grooves G in depth of the cylindrical surface of the another roll, at the interface and working areas between the two rollers.
  • the fabric (or fabrics) used for the body of the container may have a basis weight of between 140 g / m 2 and 250 g / m 2 .
  • the canvas (or fabrics) used for the filling and emptying chutes may have a grammage of between 50 g / m 2 and 200 g / m 2 .
  • the inner liner can be positioned in the container, without particular attachment between the container and the inner liner.
  • the inner liner can be attached to the container, preferably by stitching, for example at the (four) corners of the device.
  • the adhesive used to bond the inner wall of the container and the outer wall of the inner liner can fill and plug the micro-perforations and, thus, alter the performance of the inner liner with respect to the boundary allowed on the breakdown voltage.
  • the inner liner 3 may be constituted by a bellows sheath 6, whose interior volume is intended to receive the material.
  • Each bellows 7 is defined by three lines of folding of the sheath, parallel.
  • This sheath 6 with its bellows 7 (two in number) is typically obtained by extrusion blow molding of a polymer, and then generally wound flat in a coil, as illustrated in FIG. figure 11a .
  • the inner lining 3 can be constituted by such a bellows jacket 6 micro-perforated, extending in length, in one piece and continuously, from the filler neck 27 and up to the discharge chute 28.
  • This sheath 6 in one piece, constitutes and as illustrated in FIG. figure 12 , the inner liner successively covering the walls of the filler neck 27, the roof 26, the side walls of the container 2, the bottom 21, and the discharge chute 28.
  • This sheath can be fixed in particular by sewing to the container 2 in particular at the four corners, as well as at the roof wall 26, or even the filler neck 27.
  • this micro-perforated bellows sheath 6 can be obtained from a non-micro-perforated bellows sheath, by subjecting the unperforated sheath, in a flat position (in the form of a band), at the work of the needles of the rollers 40 or 50 of a perforating device.
  • the storage device according to the invention can find a particular application for the storage and / or transport of particularly powdered material, in the field of food processing, especially baby food and the pharmaceutical field.
  • Naturally other embodiments could have been envisaged without departing from the scope of the invention as defined below.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Packages (AREA)
  • Bag Frames (AREA)
EP14790140.9A 2013-08-02 2014-07-17 Dispositif de stockage souple comprenant un recipient souple et une doublure interne, méthode pour sa fabrication et son utilisation Active EP3027534B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL14790140T PL3027534T3 (pl) 2013-08-02 2014-07-17 Elastyczne urządzenie do przechowywania zawierające elastyczny pojemnik i wewnętrzną wykładzinę, sposób jego wytwarzania i zatosowanie
RS20170951A RS56376B1 (sr) 2013-08-02 2014-07-17 Fleksibilan uređaj za skladištenje koji obuhvata fleksibilan kontejner, i unutrašnju postavu, postupak za njegovu proizvodnju, i njegova upotreba

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1357723A FR3009290B1 (fr) 2013-08-02 2013-08-02 Dispositif de stockage pour vrac destine aux matieres pulverulentes
FR1451162 2014-02-14
PCT/FR2014/051836 WO2015015085A2 (fr) 2013-08-02 2014-07-17 Dispositif de stockage, souple, comprenant un récipient souple, et une doublure interne

Publications (2)

Publication Number Publication Date
EP3027534A2 EP3027534A2 (fr) 2016-06-08
EP3027534B1 true EP3027534B1 (fr) 2017-07-05

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US (1) US9938076B2 (zh)
EP (1) EP3027534B1 (zh)
CN (1) CN105517919B (zh)
ES (1) ES2642874T3 (zh)
LT (1) LT3027534T (zh)
PL (1) PL3027534T3 (zh)
RS (1) RS56376B1 (zh)
WO (1) WO2015015085A2 (zh)

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Also Published As

Publication number Publication date
ES2642874T3 (es) 2017-11-20
US9938076B2 (en) 2018-04-10
RS56376B1 (sr) 2017-12-29
LT3027534T (lt) 2017-10-10
CN105517919A (zh) 2016-04-20
CN105517919B (zh) 2018-01-16
WO2015015085A2 (fr) 2015-02-05
US20160185521A1 (en) 2016-06-30
WO2015015085A3 (fr) 2015-04-16
EP3027534A2 (fr) 2016-06-08
PL3027534T3 (pl) 2017-12-29

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