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
  • B65D33/00—Details of, or accessories for, sacks or bags
  • B65D33/16—End- or aperture-closing arrangements or devices
  • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
  • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor

Definitions

• the present invention relates to the field of closure systems, finding particular application for the production of resealable bags or more generally for products requiring a system of hook or reusable closure, particularly in the food industry, as well as the medical field or hygiene.
• Reusable closures are commonly used in many fields, and can be made in a number of ways.
• closures made by means of complementary profiles arranged on two elements intended to be assembled or closures made by means of loop / hook type systems or hooks / hooks, which form groups commonly called self-gripping , that is to say, sets for which a contact causes a reversible hooking loops / hooks.
• a recurring problem in such closures is to ensure a good hold in the closed state, while being easy to open and close by a user.
• closure systems must be able to be assembled on the products concerned, which entails important requirements in terms of guiding and resistance to assembly on an article.
• closure systems must be supplied free of all contamination, particularly in the field of hygiene and food processing, particularly with regard to certain standards, such as the BRC / IOP standard for the food industry.
• the present invention aims to propose a closure system at least partially responding to these various problems, and thus proposes a closure system comprising
• a first assembly comprising a base having a first and a second opposite face, a first retaining element disposed on the first face of the base, and an adhesive layer disposed on the second face of the base and adapted to enable the first set on a support surface
• a second assembly comprising a base having a first and a second opposite face, a second retaining element disposed on the first face of the base, and an adhesive layer disposed on the second face of the base and adapted to make it possible to secure the second set on a support surface, the first and second retaining members being configured to engage to effect a resealable connection,
• the system being characterized in that the adhesive layer of at least one of said sets comprises two adhesive portions each configured to secure said assembly on a support surface, and having distinct breaking forces,
• the system optionally has one or more of the following features, taken independently or in combination:
• the adhesive layer of at least one of said sets comprises recessed portions such that all or part of the adhesive portions of said at least one set are disjoint; at least one of recessed portions can then define a closed cavity, including a sensory marker.
• Each set further comprises a sole forming a support surface, each base being secured to a first face of the associated sole by means of their adhesive layers; said adhesive layers are then for example made by welding said sets on the soles.
• said at least one closed cavity is delimited by the base, the sole, and adhesive portions of the set considered.
• the adhesive portions define two fracture forces Fr1 and Fr2 distinct, the retaining elements define an opening force F, said forces being such that Frl ⁇ F ⁇ Fr2.
• the said retaining elements are each formed in one piece with the associated base, and where appropriate also with the associated adhesive layer.
• Said holding elements comprise retaining element fields, at least one of said retaining elements comprising hooks.
• At least one of said retaining elements comprises a profile extending in a longitudinal direction.
• the first and the second set are joined, and form a single set.
• each of said sets comprises at least two adhesive portions having distinct breaking forces.
• the invention also relates to a container comprising two side walls defining an opening for accessing an internal volume, said container comprising a closure system as defined above disposed on its side walls so as to form a resealable opening.
• each set comprises an inner border and an outer border, the inner border being disposed in the internal volume of the container, and the outer edge being disposed outside the internal volume of the container,
• the adhesive layer of at least one of the sets comprises an inner portion and an outer portion having distinct breaking forces, and is configured so that its inner portion has a breaking force lower than the breaking force of its portion external.
• each set comprises an inner border and an outer border, the inner border being disposed in the internal volume of the container, and the outer edge being disposed outside the internal volume of the container, the adhesive layer.
• at least one of the sets comprises an inner portion and an outer portion having distinct breaking forces, and is configured so that its outer portion has a breaking force less than the breaking force of its inner portion.
• each set comprises an inner border and an outer border, the inner edge being disposed in the internal volume of the container, and the outer edge being disposed outside the internal volume of the container, the layer adhesive of each of the sets comprises an inner portion and an outer portion having distinct breaking forces,
• the adhesive layer of one of the sets is configured so that its outer portion has a breaking force less than the breaking force of its inner portion
• the adhesive layer of the other of the assemblies is configured so that its inner portion has a breaking force less than the breaking force of its outer portion. More particularly, the portion adhesive having a lower breaking force is located at least partly in an area defined by the projected first and / or second retaining elements.
• FIG. 1 shows an exemplary system according to one aspect of the invention
• FIG. 2 shows another example of a system according to one aspect of the invention
• FIGS. 3 to 10 show several other examples of systems according to one aspect of the invention, associated with a container such as a bag,
• This figure shows a closure system comprising two assemblies 100 and 200 adapted to achieve a resealable connection.
• Each set comprises a base having opposite first and second faces, a retainer disposed on the first face of the base, and an adhesive layer disposed on the second face of the base. the base and adapted to allow to secure the assembly on a support surface.
• a base 110 having a first opposing face 112 and a second face 114, a retaining element 120 disposed on the first face 112 of the base 110, and an adhesive layer 130 disposed on the second face 114 are defined.
• the base 110 adapted to allow to secure the first assembly 100 on a support surface, not shown in this figure.
• a base 210 having an opposing first face 212 and a second face 214, a retaining element 220 disposed on the first face 212 of the base 210, and an adhesive layer 230 disposed on the second face 210 are defined.
• face 214 of the base 210 adapted to allow to secure the first assembly 200 on a support surface, not shown in this figure.
• the adhesive layers 130 and 230 may be of any type, and in particular made by gluing or welding with addition of material or without addition of material.
• the retaining elements 120 and 220 of the first and second assemblies respectively are configured to engage so as to achieve a resealable connection, for example of the self-gripping type or contact closure.
• the retaining elements 120 and 220 are hook or equivalent fields, thereby providing a male-male type connection, in which the contacting of the two retaining elements 120 and 220 and possibly to apply a pressure to it entails their engagement.
• the retaining elements 120 and 220 may independently extend over the entire width of the base 110 and 210, comprise several fields of retaining elements or a single retaining element field as shown in the figures.
• the retaining elements 120 and 220 may be of any type, in particular continuous assemblies made by extrusion, fields of discrete elements that may extend along parallel longitudinal lines or else arranged in staggered rows, or a combination of continuous assemblies and fields of discrete elements. Several other embodiments will subsequently be represented.
• the retainers 120 and 220 may be formed in one piece with the associated base.
• the first and second assemblies 100 and 200 may moreover form a single assembly, as will be seen hereinafter with reference to FIG. 10.
• the retaining elements 120 and 220 then typically define a portion of this single assembly adapted to rupture. when applying an external or internal force depending on the application.
• Such an embodiment is particularly advantageous for example in the case of an application to a bag, and more particularly for a spout or when the assembly is applied continuously over the entire periphery of the bag.
• the adhesive layer of at least one of the sets 100 and 200 comprises two adhesive portions having distinct breaking forces.
• the adhesive layer 130 of the first set 100 here comprises two separate adhesive portions 132 and 134, having distinct breaking forces. Each of these adhesive portions 132 and 134 is disposed between the first assembly 100 and the support surface, so as to make a connection between the second face 114 of the base 110 of the first assembly 100 and the support surface. These two adhesive portions 132 and 134 are disjoint; they extend opposite distinct surfaces of the base 110 of the first set 100. By “opposite distinct surfaces” is meant that the projections of the adhesive portions 132 and 134 on the base 110 in a direction normal to the second surface 114 of the base 110 are distinct, and do not overlap.
• these two adhesive portions 132 and 134 are adapted to secure an assembly, here the first assembly 100, on a support surface, this joining opposing a given resistance to a force applied thereto.
• the two adhesive portions 132 and 134 are here configured to provide bonds having distinct breaking forces, ie for a given force applied to the first set, one of the adhesive portions 132 or 134 may to break, while the other 134 or 132 remains in the state and maintains the connection between the assembly 100 and the support surface.
• the different adhesive portions of the same adhesive layer may be made using identical or different materials and methods.
• the adhesive portions of the same adhesive layer can be formed in one piece with the associated base.
• the figures represent the invention schematically. Indeed, the borders (the interface between two adhesive portions defining distinct breaking forces or outer / inner edges (if presence of a sealed cavity)) could, in section, have for example an inclined shape, a U-shape turned 90 °; the width of the adhesive layer could be less than that of the base, or at least one of the opposite ends of the second face 114 of the base 110 of the first set could define a portion free of an adhesive material (or bond / adhesive zone).
• the second set 200 has a substantially uniform adhesive layer 230, having a uniformly uniform breaking force.
• the adhesive layer 230 of the second set may also have a plurality of adhesive portions having distinct breaking forces.
• the adhesive portions 130 and 230 may be made according to different methods; for example by application of an adhesive or fuse material, by welding, gluing, diffusion, or any other suitable method.
• the adhesive portion 134 provides a bonding having a breaking force lower than that achieved by the adhesive portion 132, and also less than that achieved by the adhesive layer 230
• the retaining elements 120 and 220 define a resistance of the connection made, which is designated F, beyond which the retaining elements 120 and 220 separate from one another.
• at least one of the sets 100 and 200 comprises an adhesive layer comprising two portions defining two distinct breaking forces of the set considered with its support surface.
• the properties of the closure system are modified, and the rupture of one of the portions of the adhesive layer causes the creation of a hinge-type structure for at least one set, such as it will be represented in the figures described later.
• the adhesive portion 134 provides a bonding having a breaking force (Frl) less than that (Fr2) made by the adhesive portion 132, during the first opening of the system, the adhesive portion 134 will then break.
• the portion of the base 110 initially secured by the adhesive portion 134 on a support surface is then disengaged, forming a hinge portion.
• the adhesive portion 132 may be made by welding, while the adhesive portion 134 may be made by gluing.
• the two adhesive portions 132 and 134 may both be made by welding, the materials and methods used then defining distinct resistances, for example different soldering temperatures, different pressures, different contact times or a combination of several of these parameters.
• the two adhesive portions 132 and 134 may be made by gluing, the materials and methods used then defining distinct resistances.
• the adhesive layer 230 defines a breaking force greater than the force F, thus securing the second assembly 200 on a support during use of the closure system.
• the adhesive layer breaking force 230 and the breaking force of the adhesive portion 132 may be similar.
• modify the properties of the closure system during its first use, and not from the outset allows to simplify the manufacture and integration on a product.
• the adhesive portions will break successively before the retaining elements 120 and 220 separate.
• the proposed system provides a tamper-proof closure, which is broken when first opened.
• FIG. 2 shows a particular embodiment of the system illustrated previously in FIG. 1.
• the adhesive layer 130 of the base 110 of the first set 100 defines a recessed portion between the adhesive portions 132 and 134.
• the adhesive portions 132 and 134 form strips disposed along two opposite ends of the second face 114 of the base 110 of the first set 100, these two strips being disjoint, and thus defining a portion free of adhesive material.
• the first assembly 100 will be maintained on a support surface only by an adhesive tape corresponding to the adhesive portion 132, thus forming a hinge having a greater amplitude than in the mode embodiment illustrated above.
• Figures 3 to 10 show several examples of application of a closure system according to one aspect of the invention.
• Figures 3 and 4 show an example of a container provided with a closure system as described above.
• the container as presented is of the bag type, and comprises two walls 1 and 2 connected, defining an internal volume 3 and an opening 4, the closure system being arranged to close this opening 4.
• the sets 100 and 200 are similar to those already presented with reference to Figure 1.
• the two sets 100 and 200 are here each secured to the walls 1 and 2 of the container, via their respective adhesive layers 130 and 230.
• one of the sets, here the assembly 100 comprises an adhesive layer. 130 having two adhesive portions 132 and 134 defining distinct breaking forces, as already described above with reference to Figure 1.
• the adhesive layer 230 defines a breaking force greater than the force F, thus ensuring the joining of the second 200 together on a support, in this case the wall 2 of the container, when using the closure system.
• the adhesive portion 134 defines a breaking force Fr1 and the adhesive portion 132 defines a breaking force Fr2, such that Fr1 ⁇ Fr2.
• the retaining elements 120 and 220 define a connection between the two assemblies 100 and 200 configured to withstand a force F, such that Fr1 ⁇ F ⁇ Fr2.
• the system can be assembled on the container before or after filling.
• the container may be filled, then the system may be secured to it, with its two assemblies 100 and 200 engaged or not, or the two sets 100 and 200 may be joined independently to the container, the container may be filled, and then the two assemblies can be engaged to close the container. container.
• the use of such a container is described below.
• the two sets 100 and 200 Prior to the first opening, the two sets 100 and 200 are respectively secured to the walls 1 and 2 of the container via their adhesive layers 130 and 230.
• the user When the user wishes to open the container to access its contents, it applies a force on the walls 1 and 2 of the container, tending to remove them, in order to disengage the retaining elements 120 and 220.
• This force is usually applied via the free ends of the container, that is to say the ends of the walls 1 and 2 of the container defining its opening 4. These ends may comprise gripping means (not shown) for the user, for example streaks.
• the applied force is greater than the force F, the retaining elements 120 and 220 disengage, and the container is opened. If necessary, during the disengagement of the retaining elements 120 arranged in line with the adhesive portion 134, the latter is totally or partially broken.
• a force is applied to the closure system from inside the container, for example due to a fall of the container from a height of one meter, the force applied will initially break the adhesive portion 134, and thus disengage a portion of the base 110 of the wall 1, so as to form a hinge-type structure as shown in Figure 4.
• Such a hinge-type structure increases the strength of the closure system to a bias exerted from inside the container, and therefore reduces the risk of accidental opening of the container.
• FIGS. 5 and 6 show a variant of the embodiment described above with reference to FIGS. 3 and 4, in which the two assemblies 100 and 200 are each secured to a sole plate, respectively 140 and 240, forming a support for the assemblies 100 and 200.
• These two soles 140 and 240 are themselves secured to the walls 1 and 2 of the container, for example by welding, gluing, or by any other suitable means.
• the flanges 140 and 240 extend beyond the assemblies 100 and 200, and the flanges 140 and 240 are thus secured to the walls 1 and 2 via connections made on either side of the assemblies. 100 and 200, offset from the sets 100 and 200.
• the closure system can therefore be provided equipped with such soles 140 and 240, to facilitate assembly on a product such as a container or a hygiene article and with a high assembly speed.
• one of the assemblies here the assembly 100, comprises an adhesive layer 130 having two adhesive portions 132 and 134 defining distinct breaking forces, as already described above with reference to FIG. 1.
• the adhesive layer 230 defines a breaking force greater than the force F, thus securing the second assembly 200 on a support during use of the closure system. It is considered here that the adhesive portion 134 defines a breaking force Fr1 and the adhesive portion 132 defines a breaking force Fr2, such that Fr1 ⁇ Fr2.
• the retaining elements 120 and 220 define a connection between the two assemblies 100 and 200 configured to withstand a force F, such that Fr1 ⁇ F ⁇ Fr2.
• the soles 140 and 240 are secured to the walls 1 and 2 of the container so as to have a strictly greater resistance to the adhesive layers of the assemblies 100 and 200, and to the connection defined by the retaining elements 120 and 220, so that the soles 140 and 240 remain integral with the walls 1 and 2 during the use of the system.
• the system can be assembled on the container before or after its filling. For example, the container may be filled, then the system may be secured to it, with its two assemblies 100 and 200 engaged or not, or the two sets 100 and 200 may be joined independently to the container, the container may be filled, and then the two assemblies can be engaged to close the container. container.
• the two sets 100 and 200 Prior to the first opening, the two sets 100 and 200 are secured to their respective soles 140 and 240 via their adhesive layers 130 and 230.
• a force is applied to the closure system from inside the container, for example due to a fall of the container from a height of one meter, the force applied will initially break the adhesive portion 134, and thus disengage a portion of the base 110 of the soleplate 140, so as to form a hinge-type structure as shown in Figure 6.
• Such a hinge-type structure increases the strength of the closure system to a bias exerted from inside the container, and therefore reduces the risk of accidental opening of the container.
• Such a container thus has a greater resistance to opening from inside the container than from its outside, while allowing a simplified opening from outside the container, and having a simplified assembly.
• Figure 7 shows another embodiment of container comprising a closure system according to one aspect of the invention.
• the retaining elements 120 and 220 of the two sets 100 and 200 are profiles having complementary shapes. It will be understood that fields of discrete elements as shown in FIGS. 5 and 6, or any other types of retaining elements may be used.
• the two sets 100 and 200 are secured to the soles 140 and 240 via adhesive strips disposed along the inner and outer edges of the bases 110 and 210 of the sets 100 and 200. These adhesive strips thus define a recessed portion. between each base and its associated sole, as previously described with reference to the first set 100 shown in FIG.
• the two adhesive portions 132 and 134 connecting the first base 110 to the soleplate 140 are distinct, as already described with reference to FIG. 2.
• the two adhesive portions 232 and 234 connecting the second base 210 to the soleplate 240 are also distinct, and define distinct fracture forces, respectively Fr3 and Fr4 for the adhesive portions 234 and 232, such that Fr3 ⁇ F ⁇ Fr4, where F is the force required to disengage the retaining elements 120 and 220.
• the Frl and Fr3 forces are typically the same, as are the Fr2 and Fr4 forces, since the adhesive portions 132 and 134 are identical to the adhesive portions 232 and 234, respectively.
• the adhesive portion 234 having a lower resistance is here disposed towards the outside of the container.
• this adhesive portion 234 will break, and thus allows in particular to form a container opening indicator, or to increase the resistance to the opening of the closure system while simplifying its assembly for example on the walls of a container, or on any other product.
• the adhesive portion 134 will in turn break when applying a force greater than Frl from inside the container, and thus protect the container against the risk of accidental openings, as already indicated above.
• the proposed structure will therefore allow to form a double hinge structure, one 100 of the sets being connected to the container by its outer rim, while the other 200 sets is connected to the container by its inner edge.
• the recessed portions formed between the bases and the soles can then be fully closed, so as to form sealed cavities.
• the breaking of the adhesive portion 134 causes the opening of the sealed cavity formed between the base 110 and the soleplate 140.
• the rupture of the adhesive portion 234 causes the opening of the sealed cavity formed between the base 210 and the sole 240.
• a sensory marker in such recessed portions, for example a visual or olfactory marker, which would then be released during the first use of the closure system, to provide an additional use control.
• Figure 8 shows yet another embodiment of container comprising a closure system according to one aspect of the invention.
• the retaining elements 120 and 220 are of the loops and hooks type. As before, it is well understood that fields of discrete elements as shown in FIGS. 5 and 6, or any other type of retaining elements can be used, and that this particular example of retaining elements is only 'illustrative.
• the first assembly 100 is secured to the soleplate 140 via a uniform adhesive layer 130, ensuring the maintenance of the first assembly 100 on the soleplate 140 during use of the system.
• the second assembly 200 is secured to the sole 240 via an adhesive layer 230 comprising two adhesive portions 232 and 234 distinct, similar to those previously presented with reference to Figure 7.
• the two adhesive portions 232 and 234 thus define distinct breaking forces, respectively Fr3 and Fr4 for the adhesive portions 234 and 232, such that Fr3 ⁇ F ⁇ Fr4, where F is the force required to disengage the retaining elements 120 and 220 .
• this adhesive portion 234 will break, and form an opening indicator of the container.
• FIGS. 1 to 8 define only two distinct adhesive portions. It is well understood that such examples are not limiting, and that multiple adhesive portions defining distinct breaking forces can be realized, since at least one of the adhesive layers of one of the sets 100 and 200 comprises at least two adhesive portions defining distinct breaking forces.
• Figure 9 thus shows another embodiment of the container comprising a closure system according to one aspect of the invention.
• the adhesive layer 130 here comprises three distinct portions, 132, 134 and 136, respectively, adapted to achieve a joining of the first 100 together on a support by defining at least two distinct breaking forces.
• the adhesive portion 132 disposed between the adhesive portions 134 and 136 defines a breaking force Fr5
• the adhesive portion 134 disposed along the inner edge of the assembly 100 defines a breaking force Fr6
• the adhesive portion 136 disposed along the outer edge of the assembly 100 defines a breaking force Fr7.
• These breaking forces are for example configured such that Fr6 ⁇ F ⁇ Fr5, and Fr7 ⁇ F ⁇ Fr5.
• the adhesive portion 136 will break to form a witness of use of the container.
• the adhesive portion 134 also makes it possible to reduce the risks of accidental opening of the container, as already detailed above with reference to FIG. 5.
• the forces Fr6 and Fr7 can for example be equal or distinct.
• the breaking forces can be configured such that Fr6 ⁇ Fr5 ⁇ F ⁇ Fr7.
• the adhesive portions 134 and 132 will break successively during the application of a force from inside the container.
• the adhesive portion 136 makes it possible to maintain the connection between the base 110 and the soleplate 140, according to a hinge-type connection similar to that illustrated in FIG.
• the reverse configuration is possible, for example by configuring the breaking forces such as Fr7 ⁇ Fr5 ⁇ F ⁇ Fr6.
• FIG. 10 shows another embodiment of container comprising a closure system according to one aspect of the invention.
• the container comprises an opening 4 defining a spout, which can be selectively opened or closed by means of the closure system comprising the assemblies 100 and 200 arranged on the walls 1 and 2 of the container.
• the two sets 100 and 200 form here a single continuous set, and are typically identical.
• the proposed closure system here makes it possible to improve the control of the resistance to the opening of the pouring spout thus formed, and to improve its resistance to accidental opening, for example in the event of a drop of the container.
• the closure system as shown in Figure 10 here is devoid of a sole. As an alternative embodiment, this closure system could comprise a sole as described above.
• the closure system is of similar interest in the case where the assemblies 100 and 200 are applied continuously all around the opening of a container.
• welding is understood to mean, for example, a macromolecular diffusion weld of the ultrasonic, thermal, or ultra-frequency type.
• the opening force F of the bag is for example between 0.1N and 200 N, more particularly between 0.5N and 100N, and even more particularly between IN and 60N.
• the base, the retaining elements and the sole of the assemblies 100 and 200 preferably consist of one (or more) polymer (s) or plastic material (s), for example, LLDPE (Linear Low Density PolyEthylene or Low Density Linear Polyethylene), LDPE (Low Density PolyEthylene or Low Density Polyethylene), m-PE (Metallocene PolyEthylene), HDPE (High Density PolyEthylene or High Density Polyethylene), EVA (Ethylene Vinyl Acetate) and PP (PolyPropylene), comprising a monomodal or multimodal molecular weight distribution (for example bimodal), in particular a composition comprising LLDPE and a plastomer, in particular a polyethylene base plastomer.
• LLDPE Linear Low Density PolyEthylene or Low Density Linear Polyethylene
• LDPE Low Density PolyEthylene or Low Density Polyethylene
• m-PE Metallocene PolyE
• the base and / or the sole of the sets 100 and 200 are preferably made of several polymer material (s) or plastic material (s), that the different materials in the base and / or the soleplate can be distributed homogeneously or non-homogeneously (for example in the form of different layers each comprising a recipe of different materials).
• the base, the retaining elements and the sole may comprise one and the same materials or at least two materials having different melting temperatures, in particular, different melting temperatures of at least 5 °. C, even more particularly, different melting temperatures of at least 20 ° C.
• the melting temperature of the materials composing the base, the retaining elements and the sole may be different or identical and may be between 50 ° C and 250 ° C, even more particularly between 60 ° C and 170 ° C.
• adhesive portions defining distinct breaking forces are understood to mean that the difference in breaking force is at least 5%, more particularly at least 10%, preferably at least 20%. % of the lowest breaking force.
• the adhesive portions are continuous in the longitudinal direction in which the retaining elements 120 and 220 extend in the machine direction or "MD - Machine Direction", that is to say the direction in which the elements Retainers are transported after their manufacture or in transverse direction or "CD - Cross Direction", that is to say the direction perpendicular to the machine direction according to the manufacturing process used.
• the adhesive portions may be made discontinuously in this longitudinal direction and / or in a lateral direction perpendicular to the longitudinal direction.
• Figures 11 and 12 are two graphs highlighting the effect of the system as presented.
• Figure 11 shows two plots, representing two "openings" of the same successive closure system according to one aspect of the invention.
• the plot C1 thus represents the first opening of the system, and the plot C2 the second opening of the system.
• the force is applied so as to simulate an opening force applying to the closure system in an "unwanted" direction, corresponding, for example, to an opening force applied from inside a bag, such as already described with reference to Figures 3 and 4 presented above.
• the two lines C1 and C2 have a main peak up to a force of about 35 N.
• the curve curve C1 has meanwhile a first peak of lower amplitude (of the order of 10 N) slightly before the main peak.
• This first peak is the application of a force and then breaking of one of the adhesive portions of the closure system.
• the main peak corresponds to the opening of the closure system after rupture of one of the adhesive portions of the closure system.
• FIG. 12 shows two traces D1 and D2, representing two successive "openings" of the same closure system comprising retaining elements identical to those used for the production of the graphs of FIG. 11, but conventionally fixed to the support surfaces that is, with a uniform adhesive layer and configured not to break with the use of the closure system.
• the two traces D1 and D2 have similar profiles, and each have a succession of peaks of reduced intensity (between 1 and 7 N around) reflecting the gradual separation of the retaining elements up to complete opening.
• the two plots D1 and D2 have similar profiles, and therefore that the closure system has substantially constant properties during the first opening and during the openings. subsequent, as opposed to the system according to the invention which has distinct properties at the first opening relative to subsequent openings. It is further noted that the peaks of the tracks D1 and D2 have an amplitude much smaller than the amplitude of the peaks of the traces C1 and C2, and although the retaining elements used are identical.
• the system according to the invention thus makes it possible to obtain strongly increased properties of opening resistance in a predetermined direction. It is further noted that an opening of a system according to the invention by applying a force in a "desired" direction, for example from the outside of a bag, will lead to traces similar to the traces D1 and D2. according to the embodiments of FIGS. 3 to 6.
• the system as presented thus makes it possible to greatly increase the resistance to the opening of the closure system when a force is applied in a first direction corresponding, for example, to a use unwanted closure system likely to lead to accidental opening, while maintaining a substantially unchanged opening resistance closure when applying a force in a second direction corresponding for example to the "normal" use and desired closure system.
• the proposed closure system allows a closure having asymmetrical properties, but the realization and assembly on a support is facilitated.
• the proposed system is advantageous in terms of hygiene compared to conventional asymmetrical closure systems; the adhesive portion configured to break with the use in fact making it possible to avoid an accumulation of impurities with respect to a system where such an adhesive portion would not be present and where an asymmetrical connection of the hinge type would be formed from the outset , which would thus form a nook in which impurities could accumulate.
• the proposed system is also very flexible in terms of applications, and allows for asymmetrical closure systems, presenting witnesses of opening, even of inviolability.
• the adhesive portion configured to break upon opening may for example be configured to leave residual marks (eg locally increased roughness, surface roughness or surface bleaching when the material is transparent) over at least one of the faces formed at the end of the breaking of this adhesive portion, thus forming an opening witness.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Closures For Containers (AREA)
• Bag Frames (AREA)
• Packages (AREA)

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• 2015
  • 2015-04-13 FR FR1553175A patent/FR3034759A1/fr active Pending
• 2016
  • 2016-04-08 EP EP16729956.9A patent/EP3283387A1/fr not_active Withdrawn
  • 2016-04-08 CN CN201680033526.7A patent/CN107690408A/zh active Pending
  • 2016-04-08 WO PCT/FR2016/050817 patent/WO2016166454A1/fr active Application Filing
  • 2016-04-08 JP JP2017553329A patent/JP2018511537A/ja active Pending
  • 2016-04-08 US US15/564,852 patent/US20180118413A1/en not_active Abandoned

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