Improved restraint system

Abstract

Improved restraint system. Restraint device comprising: - a base (10), comprising a woven material; - a plurality of restraint elements (20), said restraint elements (20) each comprising a rod (22) and a head (26), the rod (22) extending from an upper face (12) of the base (10), and the head (26) being formed at a free end (24) of the rod (22) opposite the upper face (12) of the base (10), the rods (22) of the restraint elements (20) being interwoven in the woven material of the base (10), characterized in that a portion of each of the rods (22) extending from the base (10) is at least partially coated with resin. Figure for the abstract: Fig. 3.

Description

Title of invention: Improved restraint system Technical field

[0001] The present invention relates to an improved retaining device, in particular a self-gripping retaining device, and to an improved retaining assembly, in particular a self-gripping retaining assembly. Prior art

[0002] Hook-and-loop systems are commonly used for many applications. Among the hook-and-loop systems, there are hook-and-loop or male-female systems, and hook-and-hook, mushroom-and-mushroom or male-male systems.

[0003] Male-male type systems are designed to provide a connection between two identical systems, the retaining elements then typically being of the mushroom type, so as to engage with each other. The assembly of such elements is simplified insofar as the elements can be pre-positioned before engaging them. Such elements also provide a feeling of engagement for the user, which thus makes it possible to ensure that the engagement is correctly carried out.

[0004] Furthermore, such closure systems provide high mechanical performance in terms of holding in position, with however a reduced opening-closing cycle compared to loop-hook type systems.

[0005] A recurring problem for the production of such retaining elements is to propose systems presenting interesting mechanical properties while meeting criteria in terms of industrialization and cost.

[0006] The present invention thus aims to respond at least partially to these problems. Statement of the invention

[0007] For this purpose, the present disclosure relates to a retaining device comprising: - a base, comprising a woven material - a plurality of retaining elements, said retaining elements each comprising a rod and a head, the stem extending from an upper face of the base, and the head being formed at a free end of the stem opposite the upper face of the base, the stems of the retaining elements extending at least partly into the woven material of the base, in particular the stems of the retaining elements being interwoven in the woven material of the base, characterized in that a portion of each of the rods extending from the base is at least partially coated with resin.

[0008] According to one example, at least 7% of the height of each rod is coated with resin, in some cases at least 10% of the height of each rod is coated with resin, the height being measured in a direction perpendicular to the upper face of the base.

[0009] According to one example, at least 7% of the height of each rod, which height extends from an upper face of the base, is coated with resin, in some cases at least 10% of the height of each rod is coated with resin, the height being measured in a direction perpendicular to the upper face of the base.

[0010] According to one example, less than 90% of the height of each rod is coated with resin, in some cases less than 70% of the height of each rod is coated with resin, in other cases less than 50% of the height of each rod is coated with resin, in still other cases less than 40% of the height of each rod is coated with resin, in yet another case less than 30% of the height of each rod is coated with resin, the height being measured in a direction perpendicular to the upper face of the base, and from the upper face of the base. In other words, the height of the rod in the base is not taken into consideration here to determine the height of the rod of the retaining element of the retaining device according to the invention.

[0011] In one example, each retaining element has a height greater than or equal to 0.5 mm, and the resin coating covers at least 0.1 mm of the height of each rod. In one example, each retaining element has a height greater than or equal to 0.5 mm, and the resin coating covers at least 0.1 mm of the height of each rod. In one example, each retaining element has a height greater than or equal to 1 mm, and the resin coating covers at least 0.15 mm of the height of each rod. In one example, each retaining element has a height greater than or equal to 1.5 mm, and the resin coating covers at least 0.2 mm of the height of each rod.

[0012] According to one example, each retaining element has a height less than or equal to 5 mm, and the resin coating covers at least 0.1 mm of the height of each rod.

[0013] According to one example, the heads of the retaining elements have the shape of a portion of a sphere, in particular a half-sphere, extending from the free end of the rod.

[0014] According to one example, the rod has a circular section.

[0015] According to one example, the stem of the retaining elements may be formed so as to define a collar extending radially around the free end of the stem. This collar allows for example to engage similar retaining elements. The collar may have a proximal portion arranged on the side of the base and a distal portion arranged opposite the proximal portion and defining the free end of the retaining element. According to one example, the width, in side view of the portion proximal is greater than the width of the distal portion of the collar. The collar has in certain cases the general shape of a cone or a volcano. According to one example, in a side view of the retaining device along a plane perpendicular to the upper face of the base, the projection of the visible part of the collar in this plane perpendicular to the base has variable heights varying between a minimum value between 0% and 90% of the height of the collar measured as maximum, and a maximum value between 95% and 100% of the height of the collar measured as maximum, in particular a minimum between 2% and 90% of the height of the collar measured as maximum

[0016] According to one example, the resin coating is carried out with an epoxy resin or a polyurethane resin, in particular an aliphatic polyurethane resin, more particularly with a polyester-based aliphatic polyurethane resin.

[0017] According to one example, the resin coating is carried out with a resin comprising an adhesive having a viscosity less than or equal to 500 mPa.s, more particularly less than or equal to 200 mPa.s, and / or in certain cases greater than or equal to 25 mPa.s, more particularly greater than or equal to 50 mPa.s.

[0018] According to one example, a lower face of the base, opposite the upper face of the base, is covered with an adhesive, in certain cases the adhesive has a normal separation force (in a direction perpendicular to the base) greater than 100 kPa according to the ASTM D-897 standard.

[0019] According to one example, the base is formed from synthetic monofilament and / or multifilament yarns which are woven.

[0020] According to one example, said synthetic yarns are synthetic thermoplastic yarns which include or are based on, but are not limited to, polyolefins, for example polyethylene (PE), high density polyethylene (HDPE), polypropylene (PP), polybutylene and the like; polyamide (PA), for example aliphatic polyamides such as polyamide 6, polyamide 6.6, polyamide 10, polyamide 11, polyamide 12 and the like or aromatic polyamides such as polyarylamides (PAA) or polyphthalamides (PPA); polyesters, for example polyethylene terephthalates (PET), polybutylene terephthalates (PBT), polylactic acids, poly(phenylene sulfide) (PPS), polysulfones, polyacetals including polyoxymethylenes (POM), polycarbonates (PC), polystyrenes and the like, and mixtures and copolymers thereof.

[0021] According to one example, the base wires are made of polyamide and the retaining elements are made of polypropylene.

[0022] In one example, the retaining elements are formed from monofilament or multifilament yarn, which may include or be based on, but are not limited to, polyolefins, e.g., polyethylene (PE), high density polyethylene (HDPE), polypropylene (PP), polybutylene and the like; polyamide (PA), for example aliphatic polyamides such as polyamide 6, polyamide 6.6, polyamide 10, polyamide 11, polyamide 12 and the like or aromatic polyamides such as polyarylamides (PAA) or polyphthalamides (PPA); polyesters, for example polyethylene terephthalates (PET), polybutylene terephthalates (PBT), polylactic acids, poly(phenylene sulfide) (PPS), polysulfones, polyacetals including polyoxymethylenes (POM), polycarbonates (PC), polystyrenes and the like, and mixtures and copolymers thereof.

[0023] According to one example, the upper face of the base has a density of retaining elements greater than or equal to 15 retaining elements per cm2, in particular greater than or equal to 20 cm2, in particular greater than or equal to 30 retaining elements per cm2, in particular greater than or equal to 38 retaining elements per cm2. Thus, the density of retaining elements is sufficiently high to allow easy cooperation with other retaining elements of the “male” type to produce a “male-male” type closure.

[0024] According to one example, the upper face of the base has a density of retaining elements less than or equal to 100 retaining elements per cm2, or less than or equal to 80 retaining elements per cm2 or less than or equal to 60 retaining elements per cm2 or less than or equal to 50 retaining elements per cm2 or even less than or equal to 45 retaining elements per cm2 or even less than or equal to 40 retaining elements per cm2. Thus, the density of retaining elements is sufficiently low to allow easy cooperation with other “male” type retaining elements to produce a “Male-Male” type closure.

[0025] According to one example, the base is composed of warp threads and weft threads interlaced in a repeatable pattern, and wherein the rods of the retaining elements are interlaced in said warp and weft threads, such that each retaining element rod is interlaced in the base so as to at least partially surround a warp thread or a weft thread of the base.

[0026] According to one example, in the weft direction, the retaining device successively comprises pairs of rods connected to each other by a joining portion interlaced in the base, which rods and joining portion have a general V or W shape.

[0027] According to one example, the base comprises a monofilament weft yarn and a monofilament warp yarn.

[0028] According to one example, the material constituting the wires of the base has a melting temperature which is at least 30°C higher than the melting temperature of the material constituting the retaining element, preferably which is at least 50°C higher, more preferably which is at least 70°C higher.

[0029] The weight of the resin is between 25 and 300 g / m2, in particular between 50 and 200 g / m2.

[0030] According to one example, the ratio of the section of the rods of the retaining elements to the section of one of the wires of the base is between 0.5 and 20, preferably between 1 and 5. According to one example, the ratio of the section of the rods of the retaining elements to the section of the two wires of the base is between 0.5 and 20, preferably between 1 and 5.

[0031] The various examples presented can be taken individually or in combination. Brief description of the drawings

[0032] The invention and its advantages will be better understood upon reading the detailed description given below of different embodiments of the invention given as non-limiting examples.

[0033] [Fig-1] [Fig.l] is an overall view of a device according to one aspect of the invention.

[0034] [Fig.2] [Fig.2] is another view of a device according to one aspect of the invention.

[0035] [Fig.3] [Fig.3] is a sectional view of a device according to one aspect of the invention.

[0036] [Fig.4] [Fig.4] is a view illustrating a step for the production of a device according to one aspect of the invention.

[0037] [Fig.5] [Fig.5] is another view diagrammatically showing a step for producing a device according to one aspect of the invention.

[0038] [Fig.6] [Fig.6] is a detailed sectional view illustrating an exemplary structure of a device according to one aspect of the invention.

[0039] [Fig.7] [Fig.7] is a detailed sectional view illustrating another example of a structure of a device according to one aspect of the invention.

[0040] [Fig.8] [Fig.8] is a view illustrating a step for producing a device according to one aspect of the invention.

[0041] Throughout the figures, the elements in common are identified by identical numerical references. Description of the embodiments

[0042] [Fig.l] shows a perspective view of an exemplary device according to one aspect of the invention. [Fig.2] is a top view of [Fig.l]. [Fig.3] is a detailed and sectional view of [Fig.l].

[0043] The figures show a retaining device 1 comprising a base 10 from which a plurality of retaining elements 20 extend.

[0044] The base 10 is notably composed of a woven material. The base 10 is typically composed of warp threads and weft threads interlaced in a repeatable pattern. The warp threads and the weft threads typically have a diameter less than or equal to to 0.5 mm, typically less than or equal to 0.3 mm, or for example less than or equal to 0.25 mm, or less than or equal to 0.2 mm.

[0045] The base 10 is typically composed of monofilament and / or multifilament synthetic yarns that are woven, for example, polyamide yarns. The synthetic yarns may, for example, be synthetic thermoplastic yarns that include or are based on, but are not limited to, polyolefins, for example, polyethylene (PE), high-density polyethylene (HDPE), polypropylene (PP), polybutylene, and the like; polyamide (PA), for example, aliphatic polyamides such as polyamide 6, polyamide 6.6, polyamide 10, polyamide 11, polyamide 12 and the like or aromatic polyamides such as polyarylamides (PAA) or polyphthalamides (PPA); polyesters, for example polyethylene terephthalates (PET), polybutylene terephthalates (PBT), polylactic acids, poly(phenylene sulfide) (PPS), polysulfones, polyacetals including polyoxymethylenes (POM), polycarbonates (PC), polystyrenes and the like, and mixtures and copolymers thereof.

[0046] The material constituting the wires of the base may for example have a melting temperature which is at least 30°C higher than the melting temperature of the material constituting the retaining element, or which is at least 50°C higher, or which is for example at least 70°C higher, or for example at least 100°C higher, or even at least 110°C higher. Such a difference in the melting temperatures thus makes it possible to form the heads of the retaining elements 20 by heating and deforming the rod without impacting the material forming the base 10.

[0047] An upper face 12 of the base 10 and a lower face 14 of the base are arbitrarily defined, these designations being arbitrary and for illustrative purposes only. For illustrative purposes, it is assumed here that the base 10 is positioned flat, and that the upper face 12 of the base 10 is planar or substantially planar and defines a horizontal plane. Similarly, it is also assumed here for illustrative purposes that the lower face 14 of the base 10 is planar or substantially planar and defines a horizontal plane.

[0048] The retaining elements 20 are formed by hooks which are commonly referred to as “mushrooms”. Such retaining elements 20 have a rod 22 extending from the upper face 12 of the base 10. Thus, for the rod 22, a proximal end 23 is defined at the upper face 12 of the base 10, and a distal end 24 or opposite free end 24. A head 26 is formed on the free end 24 of the rod 22. The head has a shape adapted so that two identical retaining devices 1 can engage with each other by engaging their respective retaining elements 20 or even adapt with another equivalent, i.e. non-identical, retaining device, and comprising a base and stems, each stem being topped with a head. This type of fastener is generally called a "male-male fastener" or "self-gripping fastener" according to the English designation.

[0049] The stem 22 of the retaining elements is typically formed so as to define a collar extending radially around the free end 24 of the stem 22. This collar makes it possible to engage similar retaining elements 20. The collar has a proximal portion arranged on the side of the base 10 and a distal portion arranged opposite the proximal portion and defining the free end of the retaining element 20. According to one example, the width, in side view, of the proximal portion is greater than the width of the distal portion of the collar. The collar has in certain cases the general shape of a cone or a volcano.According to one example, in a side view of the retaining device along a plane perpendicular to the upper face 12 of the base 10, the projection of the visible part of the collar in this plane perpendicular to the base has variable heights varying between a minimum of between 0% and 90% of the height of the collar measured as maximum, and a maximum of between 95% and 100% of the height of the collar measured as maximum, in particular a minimum of between 2% and 90% of the height of the collar measured as maximum.

[0050] The rod 22 may for example have a circular, oval, polygonal section or more generally any suitable shape. In particular, a rod 22 may be produced having a cross-shaped or “plus” shaped section. Such a cross-shaped section typically has four ribs distributed regularly around a central axis of the rod 22, and extending radially around this central axis of the rod 22. More generally, the rod 22 may for example have an oval or square or rectangular section or in the general shape of a star with X regularly distributed arms, X being between 3 and 10, each arm having a proximal end and a distal end, the proximal ends of each of the arms being joined and the distal ends of the arms are all spaced from each other by the same angle.

[0051] The head 26 of the retaining elements 20 is typically produced by cutting and deforming the free end 24 of the rod 22. The shape of the head 26 of the retaining elements 20 thus typically depends on the shape of the rod 22.

[0052] Thus, in the case of a rod 22 having a circular section, the head 22 will then typically have a shape of a portion of a sphere. In the case of a section of type 22 having a cross shape, the head 22 will then typically have a shape defining four lobes. More generally, a section 22 of polygonal shape will typically be associated with a head 26 having a plurality of lobes, the number of lobes being able to depend on the shape of the polygon and being for example between 2 and 10.

[0053] The retaining elements 20 typically have a total height Ht typically greater than or equal to 0.5 mm, or 0.7 mm, or 0.8 mm, or 1 mm, or 1.5 mm, or 1.8 mm, and typically less than or equal to 5 mm, or 3.5 mm, or 3 mm, or 2.5 mm. The total height is measured in a direction perpendicular to the upper face 12 of the base 10, from the proximal end 23 of the rod 22 to the opposite end of the head 26.

[0054] The retaining device 1 typically has a total height greater than or equal to 1.3 mm, or 1.5 mm, or 1.6 mm, or 1.8 mm, or 2.3 mm, or 2.6 mm and typically less than or equal to 5.8 mm, or 4.3 mm, or 3.8 mm, or 3.3 mm. The total height of the retaining device 1 is measured in a direction perpendicular to the upper face 12 of the base 10, from the lower face 14 of the base 10 to the distal end of the head 26.

[0055] The retaining device 1 typically has a density of retaining elements 20 greater than or equal to 15 retaining elements per cm2, or greater than or equal to 20 retaining elements per cm2, or greater than or equal to 25 retaining elements per cm2 or greater than or equal to 30 retaining elements per cm2, and typically less than or equal to 100 retaining elements per cm2, or less than or equal to 80 retaining elements per cm2 or less than or equal to 60 retaining elements per cm2 or less than or equal to 45 retaining elements per cm2. With such a density of retaining elements, the retaining elements of the retaining device are sufficiently dense to cooperate with other retaining elements of the same category of another retaining device, namely of the “male” type, and sufficiently sparse (not dense) to allow their extraction with the other retaining elements of the same category, namely of the “male” type.

[0056] The retaining elements 20 are typically formed by a cord of material, for example polypropylene, which is interwoven in the weft threads and the warp threads of the base 10. Figures 4, 5, 6, 7 and 8 thus schematically illustrate the production of the retaining elements 20.

[0057] Figures 4 and 5 show a view of the base 10 in which cords of material 28 are interlaced. These cords of material 28 are shown here with a circular section; it is understood, however, that this example is not limiting.

[0058] The material cords 28 are here interlaced in the weft and warp threads of the base 10 so as to form loops at least partially surrounding the weft threads and / or the warp threads. The cords 28 form arches which extend above the upper face 12 of the base 10 between two loops around weft threads or warp threads, as can be seen in particular in FIGS. 4 and 5. The warp threads define a warp direction MD (or machine direction), and the weft threads define a CD weft direction (or transverse direction, perpendicular to the machine direction).

[0059] The material cords 28 can be interlaced in different patterns in the warp threads and the weft threads forming the base 10.

[0060] In the example of figures 1 and 2, in the weft direction, 2 weft threads extend between two adjacent retaining elements, and, in the warp direction, an alternation of 6 warp threads extend between two adjacent retaining elements then 4 warp threads extend between one of the adjacent retaining elements and another retaining element adjacent to the latter.

[0061] According to an example of [Fig.5], the warp threads (or commonly also called ground threads) extend in the vertical direction of [Fig.5] defining the warp direction MD while the weft threads extend perpendicular to the warp threads, in the horizontal direction of [Fig.5], defining the weft direction CD. According to the example shown in [Fig.5], 2 weft threads extend between two adjacent retaining elements and 4 warp threads extend between two adjacent retaining elements, without there being here an alternation of different numbers of warp threads between the retaining elements.

[0062] An arrangement of different warp and weft threads could be used, for example between 1 and 15 warp threads between two adjacent retaining elements and between 1 and 10 weft threads between two adjacent retaining elements with or without alternation of the number of threads, i.e. by varying the number of warp threads between two retaining elements and / or by varying or without varying the number of weft threads between two retaining elements. According to another example, an arrangement of different warp and weft threads could be used, for example between 2 and 8 warp threads between two adjacent retaining elements and between 1 and 4 weft threads between two adjacent retaining elements with or without alternation of the number of threads, i.e. by varying the number of warp threads between two retaining elements and / or by varying or without varying the number of weft threads between two retaining elements.

[0063] According to one example, the retaining elements of the device according to the invention are inclined relative to a normal axis (in a direction perpendicular to the upper face or to the lower face of the base 10). In particular, the inclination is between 1° and 30° between a normal axis perpendicular to the upper face of the base 10 passing through the foot of the retaining element and a straight line passing through said foot of the retaining element and tangent to the distal end of the rod, in particular, the inclination is between 2° and 15°.

[0064] According to one example, the cords of material 28 have a section that can be contained in a circle having a diameter equal to 1 mm, or equal to 0.8 mm, or equal to 0.7 mm, or equal to 0.6 mm, or equal to 0.5 mm.

[0065] [Fig.6] and [Fig.7] show two examples of embodiment for interlacing the cords of material 28 in the weft threads and the warp threads forming the base 10.

[0066] In the example shown schematically in [Fig. 6], the material cords 28 make a loop around one or more weft threads and / or one or more warp threads. Each loop of a material cord 28 therefore has a point of attachment to the base 10. This configuration is called a V-shaped structure.

[0067] In the example shown schematically in [Fig.7], the cords of material 28 make a loop around at least 3 weft threads and / or warp threads of the base 10. Each loop of a cord of material 28 therefore has at least two points of attachment to the base 10. This configuration is called a W-shaped structure.

[0068] These two examples of embodiment are not limiting, the connection between the cords of material 28 and the base 10 can be made according to any suitable pattern.

[0069] The base 10 is then typically coated with a resin. More specifically, the lower face 14 of the base 10 is typically coated with a resin comprising in particular an aqueous glue. The resin is typically applied to the lower face 14 of the base 10, and thus fills the gaps between the warp threads and the weft threads forming the base 10, and passes through the thickness of the base 10 until it at least partially surrounds the rods 22 of the retaining elements 20, in particular the rods 22 extending outside the base 10. The glue used is liquid due to its viscosity, which is typically less than or equal to 500 mPa.s, or less than or equal to 300 mPa.s, or less than or equal to 200 mPa.s, or less than or equal to 150 mPa.s, or less than or equal to 100 mPa.s, the viscosity being measured at a temperature of 25°C with an LVT viscometer marketed under the brand name “Brookfield”.Aqueous adhesive means an adhesive having a water content greater than 50% by mass of the liquid part of its composition before drying. The coating is typically carried out with an epoxy resin or a polyurethane resin, in particular an aliphatic polyurethane resin, more particularly a polyester-based aliphatic polyurethane resin.

[0070] The glue is typically combined with a crosslinking agent and / or a thickening agent and / or an anti-foaming agent together forming the resin.

[0071] More precisely, the resin covers a portion of the rod of the retaining elements 20 extending from the proximal end 23 of the rod 22.

[0072] Depending on the shape of the rod 22, the rod 22 may be at least partially covered with resin over a portion of the height H of the rod 22, the height of the rod 22 being measured from its proximal end 23, i.e. from the upper face 12 of the base 10 which is here considered to be planar, and in a direction perpendicular to the upper face 12 of the base 10. According to one example, the resin extends over at least 5% of the height of the rod 22, or over at least 10% of the height of the rod 22, or more precisely over at least 15% of the height of the rod 22, or even over at least 20% or 25% of the height of the rod 22. Hr denotes the height of the rod 22 covered at least partially with resin. According to one example, each retaining element 20 has a height greater than or equal to 0.5 mm, and the resin coating covers at least 0.1 mm of the height of each rod. According to one example, each retaining element 20 has a height greater than or equal to 0.5 mm, and the resin coating covers at least 0.1 mm of the height of each rod. According to one example, each retaining element 20 has a height greater than or equal to 1 mm, and the resin coating covers at least 0.15 mm of the height of each rod.According to one example, each retaining element 20 has a height greater than or equal to 1.5 mm, and the resin coating covers at least 0.2 mm of the height of each rod. According to one example, each retaining element has a height less than or equal to 5 mm, and the resin coating covers at least 0.1 mm of the height of each rod.

[0073] The resin may extend over all or part of the outer periphery of the rod 22 over the height considered. Considering a portion of the rod 22 between the proximal end 23 and the height Hr, all or part of the outer periphery of this portion of the rod 22 is then covered with resin. According to one example, at least 30% of the outer periphery of this portion of the rod 22 is covered with resin, or more precisely at least 35%, 40%, 50%, 60%, 70%, 80% or 90% of the outer periphery of this portion of the rod 22 is covered with resin.

[0074] The surface area covered by the resin will depend in particular on the shape of the rod 22. It is understood that the irregularities and edges on the external periphery of the rod 22 will promote a non-uniform distribution of the resin.

[0075] The base of each of the rods 22 of the retaining elements 20 is thus at least partially wrapped or coated with resin. This at least partial coating of the base of the rods 22 with resin thus stiffens the retaining elements and improves the cohesion of the assembly. Thus, when the retaining elements 20 are engaged with similar or identical retaining elements, which improves the mechanical strength of the retaining elements, improves the stability of the product, and also the number of engagement and disengagement cycles that can be carried out.

[0076] The cords of material 28 are then cut so as to separate each arch into two rods, which thus form the rods 22 of the retaining elements 20. This operation is typically carried out by means of a cutting tool calibrated to cut the arches formed by the cords of material 28 at a predetermined height relative to the base 10. It is commonly referred to as a shaving operation.

[0077] The free ends of the rods 22 are then subjected to a forming operation to produce the head 26 of the retaining elements 20. This forming operation comprises, for example, heating and deformation of the free ends of the rods 22 to obtain the desired shape for the heads 26 of the retaining elements 20. As indicated previously, the shape of the head of the retaining elements typically depends on the shape of the rod 22. In the case of heads 26 having the shape of a portion of a sphere, this step can, for example, be designated as a rolling operation.

[0078] The base 10 is typically coupled to an adhesive secured to the lower face 14 of the base 10. The adhesive typically comprises a foam layer 30 secured to the lower face 14 of the base 10, and an adhesive tape 40 secured to the foam layer 30, such that the foam layer 30 is positioned between the lower face 14 of the base 10 and the adhesive tape 40. The adhesive has, for example, a normal separation force (in a direction perpendicular to the base 10) greater than 100 kPa according to the ASTM D-897 standard.

[0079] The foam layer 30 is typically composed of an acrylic foam with a minimum thickness that may be 0.10 mm, 0.20 mm or 0.30 mm, and a maximum thickness that may be 3 mm, 2 mm, 1 mm or 0.5 mm. The adhesive tape 40 is typically a pressure-sensitive adhesive.

[0080] The adhesive tape 40 and the foam layer 30 are typically secured to each other, this assembly then being secured to the lower face 14 of the base 10 for example by means of an acrylic coating.

[0081] The retaining device 1 as proposed may be combined with a similar or identical retaining device.

[0082] The present disclosure thus relates to an assembly comprising a first retaining device according to any one of the embodiments described above, and a second retaining device comprising a base, a plurality of retaining elements each comprising a rod and a head, the rod extending from an upper face of the base, and the head being formed at a free end of the rod opposite the upper face of the base. Alternatively, the second retaining device may also be a retaining device according to any one of the embodiments described above, identical to or distinct from the first retaining device.

[0083] The first and second retaining devices can then be joined by engaging their respective retaining elements. This type of closure is generally called a "male-male closure" or "self-gripping fastener" according to the common term in English. The first and second retaining devices are typically positioned face to face, their retaining elements thus facing each other. Pressure is then exerted so as to bring the devices closer together. retaining, typically in a direction perpendicular to the base of the retainers, such that the heads of the first and second retainers engage. More specifically, considering as an example that the first retainer is held fixed and the second retainer is pressed onto the first retainer, the heads of the retaining elements of the second retainer will come beyond a plane defined by the heads of the retaining elements of the first retainer, and thus pass beyond the heads of the retaining elements of the first retainer. Thus, the heads of the retainers will engage via portions projecting from the rods, and oppose a separation of the retainers.

[0084] The normal separation force (in a direction perpendicular to the base 10) of the two retaining devices is for example at least greater than 10 N / cm2 and / or has a normal engagement force (in a direction perpendicular to the base 10) of the two devices greater than 5 N / cm2.

[0085] The product as proposed can thus be fixed to surfaces of objects or elements using the adhesive tape 40, these objects or elements then being able to be assembled by means of the retaining elements 20 in a reliable and reversible manner.

[0086] The various dimensional characteristics indicated in this text are averages from three individual measurements.

[0087] Although the present invention has been described with reference to specific exemplary embodiments, it is obvious that modifications and changes may be made to these examples without departing from the general scope of the invention as defined by the claims. In particular, individual features of the various illustrated / mentioned embodiments may be combined in additional embodiments. Therefore, the description and drawings should be considered in an illustrative rather than restrictive sense.

[0088] It is also obvious that all the characteristics described with reference to a method are transposable, alone or in combination, to a device, and conversely, all the characteristics described with reference to a device are transposable, alone or in combination, to a method.

Claims

Claims

1. A retaining device comprising: - a base (10), comprising a woven material, - a plurality of retaining elements (20), said retaining elements (20) each comprising a rod (22) and a head (26), the rod (22) extending from an upper face (12) of the base (10), and the head (26) being formed at a free end (24) of the rod (22) opposite the upper face (12) of the base (10), the rods (22) of the retaining elements (20) extending at least partly into the woven material of the base (10), characterized in that a portion of each of the rods (22) extending from the base (10) is at least partially coated with resin, the resin being applied by coating a lower face (14) of the base (10), opposite the upper face (12) of the base (10), and in that the upper face (12) of the base (10) has a density of retaining elements (20) greater than or equal to 15 retaining elements per cm2.

2. A retaining device according to claim 1, wherein at least 7% of the height of each rod (10) is coated with resin, in particular 10% of the height of each rod (10), the height being measured in a direction perpendicular to the upper face (12) of the base (10).

3. A retaining device according to claim 2, wherein each retaining member (20) has a height greater than or equal to 0.5 mm, and the resin coating covers at least 0.1 mm of the height of each rod (20).

4. Retaining device according to one of the preceding claims, in which the heads (26) of the retaining elements (20) have the shape of a portion of a sphere, extending from the free end (24) of the rod (20), in particular a portion of a half-sphere, or have multi-lobed shapes, in particular with a number of lobes of between 2 and 1 H

5. 1U. Device according to one of the preceding claims, in which the rod (22) has a circular or oval or square or rectangular section or in the general shape of a star with X regularly distributed arms, X being between 3 and 10, each arm having a proximal end and a distal end, the ends proximal ends of each of the arms being joined and the distal ends of the arms are all spaced from each other at the same angle.

6. Device according to one of the preceding claims, in which the resin coating is carried out with an epoxy resin or a polyurethane resin, in particular an aliphatic polyurethane resin, more particularly a polyester-based aliphatic polyurethane resin.

7. Device according to one of the preceding claims, in which the resin coating is carried out with a resin comprising an adhesive having a viscosity less than or equal to 500 mPa.s.

8. A retaining device according to any preceding claim, wherein a lower face (14) of the base (10), opposite the upper face (12) of the base (10), is covered with an adhesive.

9. A retaining device according to any preceding claim, wherein the base (10) is formed from woven monofilament and / or multifilament synthetic yarns.

10. Device according to claim 9, wherein said synthetic threads are made of thermoplastic material.

11. Device according to one of the preceding claims, wherein the base (10) is composed of warp threads and weft threads interlaced in a repeatable pattern, and wherein the rods (22) of the retaining elements (20) are interlaced in said warp and weft threads, so that each rod (22) of the retaining element (20) is interlaced in the base (10) so as to at least partially surround a warp thread and / or a weft thread of the base (10).

12. A retaining assembly which comprises a first retaining device according to one of the preceding claims and a second retaining device comprising: - a base, - a plurality of retaining elements, said retaining elements each comprising a rod and a head, the rod extending from an upper face of the base, and the head being formed at a free end of the rod opposite the upper face of the base.

13. A retaining assembly according to the preceding claim, wherein the second retaining element is a retaining element according to one of claims 1 to 11.

14. A restraint assembly according to one of claims 12 and 13, wherein the separation force of the two devices is at least greater than 10 N / cm2 and / or has an engagement force of the two devices greater than 5 N / cm2.

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