Improved self-adhesive device and associated moulding device

Abstract

A holding device (10) comprising: a base (12) having an upper surface (12A) and a lower surface (12B), said base extending along a primary direction (DP), having a width defined along a secondary direction (DS) perpendicular to said primary direction (DP), and a thickness measured along a direction perpendicular to said primary direction (DP) and to said secondary direction (DS); a plurality of holding elements extending on said upper surface of said base, each holding element comprising a stem, said holding elements being integrally formed with said base, said holding elements being arranged in rows and columns respectively extending along said secondary direction (DS) and said primary direction (DP), said device being characterized in that at least X rows and / or X columns of holding elements of the holding device have a different number of holding elements, with X equal to 2.

Description

Technical Field

[0001] This disclosure relates to a self-grabbing device. Background Technology

[0002] Several systems and methods for producing retaining elements equipped with retaining devices (such as hooks) are known, for example, as described in documents WO2017187096, WO2017187097, WO2017187098, WO2017187099, WO2017187101, WO2017187102, WO2017187103 and WO2019145646.

[0003] The recurring problem involves the production of strips that include both areas with and without retaining elements, which is technically complex and expensive. Furthermore, it is currently difficult to establish a clear boundary between areas with and without retaining elements and their adjacent counterparts. Summary of the Invention

[0004] Therefore, this disclosure aims to at least partially solve the above-mentioned problems.

[0005] Therefore, this disclosure relates to a holding device, and further to a holding device comprising a base having an upper surface and a lower surface, the base extending along a primary direction, having a width defined along a secondary direction perpendicular to the primary direction, and a thickness measured along directions perpendicular to both the primary and secondary directions, a plurality of holding elements extending on the upper surface of the base, each holding element comprising a rod, the holding elements being integrally formed as a single piece and produced together with the base by extrusion, the holding elements being arranged in rows and columns extending along the secondary and primary directions respectively, the device being characterized in that at least X rows and / or X columns of the holding device have a different number of holding elements, where X equals 2. In particular, X equals 3, 4, 5, or 6 to allow for the production of complex patterns with a sufficiently precise level of detail. More generally, X is typically X 最小值 With X 最大值 Natural numbers between X and X 最小值 It can be equal to, for example, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, or 20, and X 最大值 It can be, for example, equal to 500, 450, 400, 350, 300, 250, 200, 150, 100, or 50. The claimed invention allows for the precise definition of patterns with an optimized and improved appearance compared to the prior art, while maintaining significant / satisfactory gripping ability, even equivalent to the outer contour of a similar shape without areas lacking retaining elements.

[0006] According to one example, at least two rows and / or at least two columns of the holding device have different numbers of holding elements, and the difference between the number of holding elements in the at least two rows and / or at least two columns is greater than or equal to 1, or more specifically, greater than or equal to 2, or for example greater than or equal to 3, 4, 5 or 6, to allow the generation of complex patterns with a sufficiently precise level of detail.

[0007] According to one example, the plurality of retaining elements form one or more separate patterns, each pattern being formed by a plurality of rows and columns of retaining elements. "Separate" means that the pattern is separated by at least one row and / or column without retaining elements. According to one example, the retaining elements are arranged to form a regular pattern on the upper surface of the base. "Regular" means that the pattern repeats along the primary direction. In a variant, the retaining elements are arranged to form several different patterns on the upper surface of the base, typically regular patterns, for example, patterns that alternately repeat or do not repeat on the upper surface of the base along the primary direction.

[0008] According to one example, the retaining element is arranged to form a pattern on the upper surface of the base, typically a regular pattern. "Regular" means that the pattern repeats along the primary direction. Alternatively, the retaining element is arranged to form several different patterns on the upper surface of the base, typically regular patterns, such as patterns that repeat or do not repeat alternately on the upper surface of the base along the primary direction.

[0009] According to one example, for instance in the patterned area, the upper surface of the base includes a plurality of retaining elements / cm along the primary direction and / or along the secondary direction, said plurality of retaining elements / cm being greater than 2 retaining elements / cm, more specifically greater than 5 retaining elements / cm, particularly greater than 10 cavities / cm, and less than 1,500 retaining elements / cm, more specifically less than 1,000 retaining elements / cm, and for example less than 700 retaining elements / cm, more particularly less than 400 retaining elements / cm, and even more particularly less than 200 retaining elements / cm.

[0010] According to one example, for each pattern, each pair of rows arranged continuously along the primary direction has multiple retaining elements, the number of which varies to less than or equal to 10 retaining elements, particularly less than or equal to 5 retaining elements, which allows for, for example, easy demolding.

[0011] According to one example, for each pattern, each pair of rows arranged continuously along the primary direction has multiple retaining elements, and optionally only those with more than or equal to 7 retaining elements (especially 8 retaining elements, such as 9 retaining elements), the number of which varies less than or equal to 40% of the maximum number of retaining elements in each pair of rows, typically less than or equal to 30% or 15%.

[0012] According to one example, for each pattern, each pair of columns arranged continuously along the secondary direction has a number of holding elements, the number of which varies to less than or equal to 15 holding elements, or less than or equal to 10 holding elements, and in particular less than or equal to 5 holding elements.

[0013] According to one example, for each pattern, each pair of columns arranged continuously along the secondary direction has multiple retaining elements, and optionally only those with more than or equal to 7 retaining elements (especially 8 retaining elements, such as 9 retaining elements), the number of which varies less than or equal to 40% of the maximum number of retaining elements in each pair of columns, typically less than or equal to 30% or 15%.

[0014] According to one example, each pattern is completely surrounded by an area on the upper surface of the base without retaining elements, and is positioned at a distance greater than 1.5 mm (especially 2.5 mm) from the boundary of the base (in particular from all boundaries of the base).

[0015] According to one example, each pattern is defined by an outer contour, and each pattern includes at least one area without retaining elements within the region defined by its outer contour. According to one example, the outer contour may be defined on the base by (continuous or discontinuous) slots or (continuous or discontinuous) studs, and on the molding strip by (continuous or discontinuous) studs or (continuous or discontinuous) slots.

[0016] According to one example, the pattern(s) is defined by an outer contour, and the pattern(s) includes at least one area without a retaining element within the region defined by its outer contour. The retaining element(s) immediately adjacent to (and / or defining) the outer and / or inner contour has a rod shape similar to or identical to the rod shape of a retaining element at a distance from the outer and / or inner contour. According to one example, the pattern(s) is defined by an outer contour, and the pattern(s) includes at least one area without a retaining element within the region defined by its outer contour. The retaining element(s) immediately adjacent to (and / or defining) the outer and / or inner contour has a head shape similar to or identical to the head shape of a retaining element at a distance from the outer and / or inner contour. "Immediately adjacent" means that the retaining element is positioned in a row and / or column adjacent to or spaced at most two rows and / or columns from the row and / or column defining the outer or inner contour. Conversely, retaining elements separated from the inner or outer contour by at least two rows and / or columns are considered to be at a distance from the contour, or more generally, retaining elements not immediately adjacent to the contour are considered to be at a distance from the contour. Therefore, the retaining device has maximized gripping, particularly immediately adjacent to the outer and / or inner contour, while also having a more precise pattern representation. Thus, retaining elements immediately adjacent to (and / or defining) the outer and / or inner contour have optimized gripping capabilities without hindering mating with the mating element.

[0017] According to one example, the pattern (or each) is defined by an outer contour, and the pattern (or each) includes at least one area without a retaining element (or, where appropriate, no cavity) within the region defined by its outer contour. The inner contour has at least one elongated local portion defining a local centerline, which is arranged at a distance less than 20% (particularly less than 15%) of the pattern's dimension along the primary and / or secondary directions from the local inner contour. Alternatively or additionally, the pattern (or each) is defined by an outer contour, and the pattern (or each) includes at least one area without a retaining element within the region defined by its outer contour. The inner contour has at least one elongated local portion defining a local centerline, which is arranged at a distance less than 10 mm, or less than 5 mm, particularly less than 3 mm, more particularly less than 2 mm, even more particularly less than 1 mm from the local inner contour and greater than (or strictly greater than) the average pitch of the retaining elements in the pattern. The circular area without retaining elements does not form the median (centerline) as defined in this document. Therefore, the retaining device provides maximized grip while allowing for more detailed and precise pattern representation. Local centerlines include straight and / or curved portions. The length of the centerline of at least one inner contour is typically greater than 10 mm, preferably greater than 12 mm. The sum of the lengths of the centerlines of the inner contours of the pattern is typically greater than 12 mm, for example greater than 15 mm, and / or typically less than 600 mm, for example less than 400 mm, more particularly less than 200 mm. This configuration can also be applied to cavities formed in molding strips as described below.

[0018] According to one example, each pattern has at least one row and / or at least one column, said at least one row and / or at least one column comprising at least two groups of separate retaining elements separated by areas without retaining elements. According to one example, each retaining element comprises a rod and a head, the head being formed by two wings that are opposite each other and extend in the same direction, or the head extending 360° around the rod.

[0019] According to one example, for each pattern, the area including at least one (preferably each) region without a retaining element in the pattern has such width and length that the ratio between the length and the width is strictly greater than 1.1, particularly strictly greater than 1.2, and even more particularly strictly greater than 1.5.

[0020] According to one example, for each pattern, the area including at least one (preferably each) region in the pattern without a retaining element has such a maximum and minimum size that the ratio between the maximum and minimum size is strictly greater than 1.1, particularly strictly greater than 1.2, even more particularly strictly greater than 1.4, and even more particularly strictly greater than 1.6.

[0021] According to one example, the rows and columns are evenly spaced according to secondary and primary intervals, respectively. According to another example, the rows are evenly spaced according to a first-level interval and a second-level interval, where the second-level interval is not an integer multiple of the first-level interval and the first-level interval is less than the second-level interval, and / or the columns are evenly spaced according to a first-level primary interval and a second-level primary interval, where the second-level primary interval is not an integer multiple of the first-level primary interval and the first-level primary interval is less than the second-level primary interval.

[0022] According to one example, each pattern is completely surrounded by an area on the upper surface of the base without retaining elements, the area having dimensions that are strictly greater than twice the primary spacing along the primary direction and / or strictly greater than twice the secondary spacing along the secondary direction.

[0023] According to one example, the region without a retaining element, which is included in the area defined by the outer contour of each pattern, has a size that is strictly greater than twice the primary interval along the primary direction and a size that is strictly greater than twice the secondary interval along the secondary direction.

[0024] According to one example, for each pattern, the ratio between the surface of the area without retaining elements contained in the outer contour of the pattern and the surface containing retaining elements is less than 1. According to one example, the at least one pattern is symmetrical. According to another example, the pattern is defined by one or more (inner and / or outer) boundaries, the sum of the lengths of the inner and outer boundaries being greater than 70 mm, preferably greater than 95 mm, preferably greater than 100 mm, more particularly greater than 150 mm, and in some cases less than 5,000 mm, more particularly less than 3,000 mm. Therefore, the longer the outer and inner boundaries, the smaller the fakirmat effect. The fakirmat effect is an effect in the field of hook-and-loop fasteners, where the number of hooks relative to the number of loops makes it difficult (or even impossible) for the hooks to penetrate the loops to form a hook-and-loop fastener. Therefore, the retaining element device has a greater ability to engage with the gripping loop. According to one example, the pattern is inscribed in a quadrilateral polygon, each side of which is flush with a portion of the outer perimeter of the pattern, and the polygon includes a perimeter P1. The ratio (Pint + Pext) / P1 is greater than 1, and in some cases greater than 1.2, 1.3, 1.4, 1.5, or 1.6, and in others less than 20, especially less than 15. Therefore, the longer the outer and inner boundaries, the smaller the fakir pad effect. Consequently, the retaining element device has a greater ability to engage with the gripping ring.

[0025] This disclosure also relates to a molding apparatus for forming, for example, the aforementioned defined retaining device, the molding apparatus comprising a molding strip adapted for mounting on a support, the molding strip extending along a machine direction and having a width defined along a transverse direction perpendicular to the machine direction, and a thickness measured along a direction perpendicular to both the machine direction and the transverse direction, the molding strip having opposing inner and outer surfaces, the molding strip having a plurality of cavities arranged in rows and columns extending respectively along the transverse direction and the machine direction, the cavities opening outward to the outer surface of the molding strip, characterized in that at least Y rows and / or Y columns of the cavities of the molding strip have a different number of cavities, where Y equals 2. In particular, Y equals 3, 4, 5, or 6 to allow for the production of complex patterns with a sufficiently precise level of detail. More generally, Y is typically Y 最小值 With Y 最大值 The natural numbers between Y, where Y 最小值 It can be equal to, for example, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, or 20, and Y 最大值 It can be equal to, for example, 500, 450, 400, 350, 300, 250, 200, 150, 100 or 50.

[0026] A single cavity typically contains 1 to 1,000 cavities. A column of cavities typically contains 1 to 1,000 cavities.

[0027] According to one example, at least two rows and / or at least two columns of the molding apparatus have different numbers of cavities, and the difference between the number of cavities in the at least two rows and / or at least two columns is greater than or equal to 1, or more specifically greater than or equal to 2, or for example greater than or equal to 3, 4, 5 or 6, to allow the production of complex patterns with a sufficiently precise level of detail.

[0028] According to one example, the plurality of cavities form one or more separate patterns, each pattern being formed by multiple rows and columns of cavities. "Separate" means that the cavities are separated by at least one row and / or column without cavities. According to one example, the cavities are arranged to form a regular pattern on a molding strip. "Regular" means that the pattern repeats along the machine direction. Alternatively, the cavities are arranged to form several different patterns on the molding strip, typically regular patterns, such as patterns that alternately repeat or do not repeat along the machine direction on the molding strip.

[0029] According to one example, for each pattern, each pair of rows arranged continuously along the machine direction has multiple cavities, the number of which varies to less than or equal to 10 cavities, or more specifically less than or equal to 5 cavities, which allows for, for example, easy demolding.

[0030] According to one example, for each pattern, each pair of rows arranged continuously along the machine direction has multiple cavities, and optionally only those with more than or equal to 7 cavities (particularly 8 cavities, such as 9 cavities) have a number variation of less than or equal to 40% of the maximum number of cavities in each pair of rows, typically less than or equal to 30% or 15%.

[0031] According to one example, for each pattern, each pair of columns arranged continuously along the said transverse direction has a plurality of cavities, the number of which varies to less than or equal to 15 cavities, or less than or equal to 10 cavities, or more specifically less than or equal to 5 cavities.

[0032] According to one example, for each pattern, each pair of columns arranged continuously along the said transverse direction has multiple cavities, and optionally only those with more than or equal to 7 cavities (particularly 8 cavities, such as 9 cavities) whose number varies less than or equal to 40% of the maximum number of cavities in each pair of rows of cavities, typically less than or equal to 30% or 15%.

[0033] According to one example, each pattern is completely surrounded by an area without retaining elements on the outer surface of the molding strip and is positioned at a distance greater than 1.5 mm (especially greater than 2.5 mm) from the boundary of the molding strip (especially from all boundaries of the molding strip).

[0034] According to one example, each pattern is defined by an outer contour, and each pattern includes at least one region without cavities within the area defined by its outer contour.

[0035] According to one example, each pattern has at least one row and / or at least one column, said at least one row and / or at least one column comprising at least two separate groups of cavities separated by regions without cavities.

[0036] According to one example, for at least one pattern, at least one (or each) region without cavities in the pattern has a width and length such that the ratio between the length and the width is strictly greater than 1.2, and in particular strictly greater than 1.5.

[0037] According to one example, for each pattern, at least one (or each) region in the pattern that does not have a cavity has a width and length such that the ratio between the length and the width is strictly greater than 1.2, and in particular strictly greater than 1.5.

[0038] As an example, the cavity of the molding device is a through cavity.

[0039] According to one example, the columns and rows are evenly separated by a horizontal spacing and a machine spacing, respectively. According to another example, the rows are evenly separated by a first horizontal spacing and a second horizontal spacing, where the second horizontal spacing is not an integer multiple of the first horizontal spacing and the first horizontal spacing is less than the second horizontal spacing, and / or the columns are evenly separated by a first machine spacing and a second machine spacing, where the second machine spacing is not an integer multiple of the first machine spacing and the first machine spacing is less than the second machine spacing.

[0040] According to one example, each pattern is entirely surrounded by a cavity-free area on the outer surface of the molded strip, the area having dimensions that are strictly greater than twice the machine spacing along the machine direction and strictly greater than twice the lateral spacing along the lateral direction.

[0041] According to one example, the at least one cavity-free region included in the area defined by the outer contour of each pattern has a dimension strictly greater than twice the machine spacing along the machine direction and a dimension strictly greater than twice the lateral spacing along the lateral direction.

[0042] According to one example, for each pattern, the ratio between the surface of the area without cavities contained in the outer contour and the surface containing cavities is less than 1. According to one example, at least one pattern is symmetrical. According to another example, the pattern is defined by one or more (inner and / or outer) boundaries, the sum of the lengths of the inner and outer boundaries being greater than 70 mm, preferably greater than 95 mm, preferably greater than 100 mm, more particularly greater than 150 mm, and in some cases less than 5,000 mm, more particularly less than 3,000 mm. Thus, the longer the outer and inner boundaries, the smaller the "fakir pad" effect. Therefore, the retaining element device obtained due to such molding means has a greater ability to engage with the gripping ring. According to one example, the pattern is inscribed in a quadrilateral polygon, each side of which is flush with a portion of the outer perimeter of the pattern, and the polygon includes a perimeter P1. The ratio of (Pint + Pext) / P1 is greater than 1, in some cases greater than 1.2, 1.3, 1.4, 1.5, or 1.6, in some cases less than 20, particularly less than 15. Therefore, the longer the outer and inner boundaries, the smaller the "fakir pad" effect. Consequently, the retaining element device obtained due to this molding device has a greater ability to engage with the gripping ring.

[0043] This disclosure also relates to a retaining device comprising a base, typically a continuous base, having an upper surface and a lower surface, the base extending along a primary direction, having a width defined along a secondary direction perpendicular to the primary direction, and a thickness measured along directions perpendicular to both the primary and secondary directions, a plurality of retaining elements extending above the upper surface of the base, each retaining element comprising a rod, the retaining elements being integrally formed with the base, the retaining elements being arranged in rows and columns extending along the secondary and primary directions respectively, the rows and columns being typically uniformly spaced according to primary and secondary intervals respectively, the plurality of retaining elements being shaped as The device is characterized by forming one or more separate patterns, each pattern being formed by multiple rows and columns of retaining elements, wherein each retaining element has a rod extending from the upper surface of the base and a head located on the top of the rod, and for a pattern (typically for each pattern), the head of the retaining element at the first end of the pattern forming along a first direction has a first maximum size along a second direction, and the head of the retaining element at the second end of the pattern forming along the first direction (opposite to the first end of the pattern along the first direction) has a second maximum size along the second direction, the second maximum size being strictly smaller than the first maximum size.

[0044] According to one example, for a pattern, the maximum size of the head of the element is kept decreasing along a second direction from the first end of the pattern toward the second end of the pattern.

[0045] According to one example, the retaining elements forming the first end and the retaining elements forming the second end are arranged in the same column or row. The first direction typically corresponds to the primary direction or machine direction; the direction from the first end to the second end typically corresponds to the direction in which the belt runs along the machine direction during belt production.

[0046] This disclosure also relates to a molding apparatus for forming a retaining device, the retaining device comprising a base of a preform having a plurality of retaining elements and / or retaining elements.

[0047] The molding apparatus includes a molding strip formed of a first material and adapted for mounting on a support, the molding strip extending in a machine direction, having a width defined along a transverse direction perpendicular to the machine direction, and a thickness measured along a direction perpendicular to both the machine direction and the transverse direction, the molding strip having an inner surface and an outer surface, the molding strip including a plurality of cavities, characterized in that a portion of the cavities is at least partially closed by a blocking material to define a molding cavity for forming a retaining element and / or a preform of the retaining element, as well as non-functional cavities.

[0048] According to one example, the blocking material is different from the first material.

[0049] According to one example, the blocking material and / or the first material and / or the molding material are different.

[0050] According to one example, the blocking material is formed from a single layer. According to another example, the blocking material is formed from several layers (e.g., between 2 and 20 layers).

[0051] According to one example, the blocking material extends at least partially into the cavity of the molding strip. According to one example, the blocking material is fixed to the molding strip, particularly to at least one wall of the cavity of the molding strip.

[0052] According to one example, the blocking material extends at least partially between the inner and outer surfaces of the molded strip.

[0053] In one example, the blocking material is resin.

[0054] According to one example, a plugging material is at least partially disposed in the cavity, and the plugging material disposed between the inner and outer surfaces of the molding strip has a shape complementary to at least a portion of the internal volume of the cavity.

[0055] According to one example, the blocking material is at least partially arranged in the cavity, and in a sectional view along a plane perpendicular to the machine direction and / or along a plane perpendicular to the transverse direction, the height of the blocking material arranged between the inner and outer surfaces of the molding strip is greater than the sum of the heights of the blocking material outside the inner and outer surfaces of the molding strip.

[0056] According to one example, a plugging material is attached to a molding strip to, for example, form a one-piece element formed by the molding strip and the plugging material. According to one example, the molding strip and the plugging material are chemically and / or mechanically fixed together.

[0057] According to one example, the retaining element includes a rod and a head, the head being formed by two wings that are opposite each other and extend in the same direction on either side of the rod, or the head extending 360° around the rod.

[0058] According to one example, the blocking material extends on the inner and / or outer surfaces of the molding strip.

[0059] According to one example, the plugging material includes polymers and / or metal compounds and / or alloys and / or composites, the composites including reinforcing elements (such as particles and / or fibers and / or filaments), and the plugging material is different from the material of the molded strip.

[0060] According to one example, the blocking material includes polymers, particularly thermoplastic and / or thermosetting polymers and / or elastomers, such as resins, more specifically crosslinked resins, specifically UV- and / or thermal and / or chemical and / or physical and / or radically crosslinked resins.

[0061] According to one example, the plugging material is stable enough to maintain its integrity during the use of the molding strip (i.e., at temperatures between 100°C and 300°C).

[0062] According to one example, the sealing material includes at least one compound from the following list: resins and / or sealants, more specifically including:

[0063] -Epoxy and / or acrylic and / or polyester and / or polyurethane and / or silicone resins

[0064] - Epoxy and / or acrylic and / or polyester and / or polyurethane and / or silicone sealants.

[0065] According to one example, a portion of a set of cavities is at least partially closed by a blocking material, such that at least two disjoint regions filled with the blocking material exist in each cavity.

[0066] According to one example, a portion of the cavity is at least partially closed by a blocking material, so as to provide areas with blocking material and areas without blocking material in each cavity. The cavity is a through cavity, and the areas without blocking material are typically through areas. Therefore, the blocking material allows for a reduction in the cross-section of the through cavity.

[0067] According to one example, the molding cavity is arranged to form a pattern on the molding strip, typically a regular pattern. "Regular" means that the pattern repeats along the machine direction. Alternatively, the molding cavity is arranged to form several different patterns on the molding strip, typically regular patterns, such as patterns that repeat or do not repeat alternately on the molding strip along the machine direction.

[0068] According to one example, for instance in a patterned area, the molding strip includes a plurality of cavities / cm along the machine direction and / or along the lateral direction, said plurality of cavities / cm being greater than 2 cavities / cm, more specifically greater than 5 cavities / cm, particularly greater than 10 cavities / cm, and less than 1500 cavities / cm, more specifically less than 1000 cavities / cm, and for example less than 700 cavities / cm, more particularly less than 400 cavities / cm, and even more particularly less than 200 cavities / cm.

[0069] According to one example, for instance in a patterned area, the molding strip includes an opening ratio between 2% and 45% (particularly between 3% and 30%, more particularly between 4% and 20%). Therefore, the number of retaining elements to be demolded is limited to allow for easier demolding and / or lower demolding forces. In a view perpendicular to the molding strip, the molding strip includes an elementary repeating surface in one area, which includes at least one molded cavity portion. The opening ratio of the molding strip is calculated by the ratio: (surface area of ​​the molded cavity in the elementary repeating surface) / (elementary repeating surface). To avoid parallax, it is preferable to measure the opening ratio over a small area of ​​the molding strip.

[0070] According to one example, the molding cavities are arranged to form one or more separate patterns. According to one example, the molding cavities are arranged to form a repeating pattern on a molding strip, for example, a pattern repeating between 4 and 600 times, or a pattern repeating between 20 and 200 times.

[0071] According to one example, the molding strip has a thickness between 50 micrometers and 500 micrometers, preferably between 70 micrometers and 350 micrometers, and in some cases between 100 micrometers and 250 micrometers.

[0072] According to one example, in the cavity, between 10% and 90% (preferably between 20% and 80%) of the total number of cavities of the molded strip are at least partially closed by a blocking material.

[0073] According to one example, the molded strip has a circumference between 200mm and 3,000mm, and more particularly between 400mm and 2,000mm.

[0074] According to one example, the molded strip has a cavity density between 50 and 3,000 per square centimeter, particularly between 100 and 800 per square centimeter.

[0075] According to one example, the molding strip has a boundary extending along its end in the machine direction, and such a cavity is closed, that is, a cavity located in the said lateral direction at a distance between 2 and 5 mm from the boundary of the molding strip extending in the machine direction, in some cases between 1 and 5 mm, in other cases between 2 and 7 mm or between 1 and 10 mm.

[0076] According to one example, each pattern has at least one row and / or at least one column, the at least one row and / or at least one column comprising at least two groups of separately molded cavities separated by regions of blocking cavities.

[0077] This disclosure also relates to a method for preparing such a molding device, wherein

[0078] - A molded strip formed of a first material and adapted for mounting on a support is provided. The molded strip extends along a machine direction, has a width defined in a transverse direction perpendicular to the machine direction, and a thickness in a direction perpendicular to both the machine direction and the transverse direction. The molded strip has an inner surface and an outer surface.

[0079] - Apply a blocking material to the molding strip to seal off a portion of the cavity of the molding strip.

[0080] According to one example, during the step of applying the blocking material, all cavities of the molding strip are closed, followed by a step of removing (or eliminating) the blocking material from portions of the cavities to define the molding cavities. Attached Figure Description

[0081] The invention and its advantages will be better understood after reading the following detailed description of different embodiments of the invention given by way of non-limiting examples.

[0082] [ Figure 1 ] Figure 1 This is a schematic diagram of a holding device according to one aspect of the present invention.

[0083] [ Figure 2 ] Figure 2 for Figure 1 A sectional view.

[0084] [ Figure 3 ] Figure 3 This is a diagram of a molding apparatus.

[0085] [ Figure 4 ] Figure 4 This is a diagram of a variation of a molding apparatus.

[0086] [ Figure 5 ] Figure 5 for Figure 4 Detailed images.

[0087] [ Figure 6 ] Figure 6 A diagram of the holding device.

[0088] [ Figure 7 ] Figure 7 for Figure 6 Detailed images.

[0089] [ Figure 8 ] Figure 8 The schematic diagram illustrates the pattern of the retaining element or cavity.

[0090] [ Figure 9 ] Figure 9 Another pattern of the retaining element or cavity is shown schematically.

[0091] [ Figure 10 ] Figure 10 Another pattern of the retaining element or cavity is shown schematically.

[0092] [ Figure 11 ] Figure 11 Another pattern of the retaining element or cavity is shown schematically.

[0093] [ Figure 12 ] Figure 12 Another pattern of the retaining element or cavity is shown schematically.

[0094] [ Figure 13 ] Figure 13 Another pattern of the retaining element or cavity is shown schematically.

[0095] In all the accompanying drawings, common elements are identified by the same reference numerals. Detailed Implementation

[0096] Figure 1 The retaining device 10 is schematically shown, which includes a base 12 that is generally continuous and a pattern 14 in the form of a solid disc. Figure 2 As shown, the base 12 includes an upper surface 12A and a lower surface 12B, and the pattern 14 is formed by a plurality of retaining elements 16 extending from the upper surface 12A of the base 12. "Continuous base" means that in areas without retaining elements, the base has no through openings or recesses. The base 12 generally has a constant width.

[0097] Each retaining element 16 includes a rod 18. The base 12 (particularly the upper surface 12A of the base 12) also includes a region 20 without retaining elements 16. For simplicity, in Figure 1 The holding element 16 is indicated by a shaded line. Figure 1 In one embodiment, the retaining device 10 includes a strip 22 of nonwoven (or woven) material. For example, a base 12 may be overmolded onto the strip 22 of nonwoven material. The base 12 may also be bonded to the strip 22 of nonwoven material. The pattern 14 may be a single pattern (such as...) Figure 1 (as shown) or repeating pattern 14. Pattern 14 is typically defined by a closed outline 14A.

[0098] The base 12 and retaining element 16 are typically made of a thermoplastic material (e.g., a non-elastic thermoplastic). The base 12 and retaining element 16 are manufactured such that they can be stretched under a tensile force applied in a given direction and do not substantially return to their initial shape and size after the tensile force is released; in some cases, the base breaks under the tensile force. This is exemplified by a base and retaining element that, at room temperature (23°C), for 100% elongation of its initial size, retains a residual deformation or remanence (also known as "permanent strain" or "SET") greater than or equal to 20%, preferably greater than or equal to 30% of its initial size (before elongation), after elongation and release.

[0099] The retaining device 10 can, for example, be via such Figure 3 The apparatus 100 shown is manufactured. Apparatus 100 allows for the manufacture of a belt 26 for retaining devices, which can then be cut or subdivided into multiple retaining devices 10. The belt 26 includes, here continuously, a base 12 and multiple retaining elements 16. Figure 3 In one embodiment, the retaining element 16 is a hook, each hook including a rod 18 having a head 24 at the top.

[0100] The device 100 shown includes: a molding strip 102 positioned on a rotary drive 104 including two rollers 104A, 104B; and a material dispensing device 106, such as a syringe suitable for injecting molding materials (e.g., thermoplastic molding materials).

[0101] The assembly formed by the molding strip 102 and the rotary drive device 104 thus constitutes a molding device.

[0102] "Machine Direction MD" refers to the direction of displacement of the molding strip 102 in the equipment 100 during the manufacture of the holding device, and is named after the acronym "Machine Direction". "Cross Direction CD" is named after the acronym "Cross Direction" and is the direction perpendicular to the Machine Direction MD. Therefore, these directions are identified in different figures.

[0103] The illustrated example including two rollers 104A and 104B is not limiting; the number and arrangement of rollers can be varied to accommodate the length of the molding strip 102 and different positions of the equipment. For example, three rollers or only one roller may be used, such that the molding strip is arranged on the outer periphery of a single roller to form a sleeve or screen. In particular, only one of the two rollers (e.g., roller 104A) may be driven to rotate by a motorized device, while the other roller 104B is free, that is, without a motorized device, and is driven to rotate via the molding strip itself, which is driven by roller 104A.

[0104] The molded strip 102 shown includes an inner surface 102A and an outer surface 102B, with the inner surface 102A in contact with the rotary drive device 104.

[0105] The material dispensing device 106 is configured to inject molding material onto the outer surface 102B of the molding strip 102.

[0106] More specifically, the material dispensing device 106 is disposed facing the molding strip 102 and spaced apart from the molding strip 102 to define the spacer. Figure 3 The air gap “e” is shown. Reference numeral A indicates the limit of the material injected into the outer surface 102B of the molding strip 102, which corresponds to the rear edge of the material injected into the molding strip 102, the rear edge being relative to the displacement direction of the molding strip 102.

[0107] The molding strip 102 is provided with a plurality of cavities 102C, thereby allowing the production of retaining elements or preforms for producing retaining elements, for example by a subsequent calendering operation or any other suitable operation. Throughout the specification, "retaining element" will refer to a retaining element or a preform for producing a retaining element, which is intended to form a hook-and-loop self-gripping closure mechanism.

[0108] The cavity 102C is typically formed as defining a rod 102C1 and a head 102C2, the rod extending from the outer surface 102B of the molding strip 102 toward the inner surface 102A, and the head extending between the rod 102C1 and the inner surface 102A of the molding strip 102.

[0109] The molded strip 102 typically has a thickness between 50 and 500 micrometers (or typically between 70 and 350 micrometers).

[0110] The molded strip 102 is typically continuous and typically has a circumference between 200 mm and 3,000 mm (or typically between 400 mm and 2,000 mm).

[0111] The molded strip 102 has cavities 102C with a density of 50 to 3,000 cavities per square centimeter, or typically 100 to 800 cavities per square centimeter.

[0112] Therefore, it should be understood that the arrangement of the cavities 102C determines the arrangement of the retaining elements on the retaining device formed by the device 100. The cavities 102C are typically arranged in rows and columns, which are respectively arranged along the lateral direction CD and the machine direction MD. Each row and each column consists of one or more cavities 102C, which, if necessary, are aligned along the lateral direction CD and the machine direction MD, respectively.

[0113] Within the same row, consecutive cavities 102C are typically spaced evenly according to a lateral spacing. Within the same column, consecutive cavities 102C are typically spaced evenly according to a machine spacing. Alternatively, the rows may be spaced evenly according to a first lateral spacing and a second lateral spacing, where the second lateral spacing is not an integer multiple of the first lateral spacing and the first lateral spacing is smaller than the second lateral spacing, and / or the columns may be spaced evenly according to a first machine spacing and a second machine spacing, where the second machine spacing is not an integer multiple of the first machine spacing and the first machine spacing is smaller than the second machine spacing.

[0114] The rows and columns of the cavities 102C can be aligned or staggered. More specifically, different cavities 102C can be aligned along the lateral direction CD and along the machine direction MD, or offset to form an interlaced or honeycomb pattern, with two consecutive rows or two consecutive columns subsequently offset along the lateral direction and along the machine direction, respectively, with spacing corresponding to half of the lateral interval or half of the machine interval.

[0115] As will be seen later, the result is that the retaining elements 16 formed using these cavities 102C are arranged in columns and rows along the primary and secondary directions, respectively, which typically correspond to the machine direction MD and the lateral direction CD.

[0116] In the example shown, the head 24 of cavity 102C opens outward into the inner surface 102A of molding strip 102. Therefore, cavity 102C is a through cavity. This embodiment is not limiting; cavity 102C may also be blind and therefore not open outward from the inner surface 102A of molding strip 102, and / or cavity 102C may consist only of rod 102C1.

[0117] A portion of the forming rod 102C1 of the cavity 102C typically extends along a direction perpendicular to the outer surface 102B of the molding strip 102. The portion of the forming rod 102C1 of the cavity 102C typically has a geometry that rotates about an axis perpendicular to the outer surface 102B of the molding strip 102, or a geometry with a plane of symmetry extending along a direction parallel to the running direction of the molding strip 102 and / or along a direction perpendicular to the running direction of the molding strip 102.

[0118] The portion of the forming head 102C2 of the cavity 102C typically extends radially or laterally relative to an axis perpendicular to the outer surface 102B of the molding strip 102, and can be rotationally symmetrical about this axis perpendicular to the outer surface 102B of the molding strip 102. The portion of the forming head 102C2 of the cavity 102C typically has a substantially truncated conical or hexahedral shape.

[0119] The portion of the forming head 102C2 of the cavity 102C can be linear or curved, for example, forming a curved portion extending from a portion of the forming rod 102C1 of the cavity 102C toward the inner surface 102A or outer surface 102B of the molding strip 102. The molding strip can also have shapes such as those described in patent applications WO0213647A2 and / or WO0050208A2.

[0120] The portion of the head 102C2 of the cavity 102C can have a constant or variable thickness.

[0121] In the example shown in the accompanying drawings, a portion of the forming head 102C2 of the cavity 102C extends radially around a portion of the forming rod 102C1 of the cavity 102C and has a generally disk-shaped form.

[0122] The molded strip 102 may have a specific texture on its inner surface 102A or its outer surface 102B, such as slots, grooves, or channels forming vents or pins, or it may be substantially smooth.

[0123] The molded strip 102 can be formed by stacking several strips, and therefore is not necessarily a single piece or a single material. The molded strip 102 can be composed of one or more typical metallic materials or composites such as Ni, Cu, and stainless steel, or any other suitable material.

[0124] The material dispensing device 106 is typically configured to perform the injection of molding material into a section of the molding strip 102, wherein the molding strip is supported by a drive roller (in this case...). Figure 3 In the example shown, this is on the drive roller 104A. The drive roller is then formed for the bottom of the cavity 102C.

[0125] When the molding material injection is performed without the molding strip 102 being supported on the drive roller, the material dispensing device 106 may include a pedestal disposed on the other side of the molding strip 102, such that when the material injection is performed, the inner surface 102A of the molding strip 102 is supported on the base, which then forms the bottom of the cavity 102C for the molding strip 102.

[0126] For several reasons, it is advantageous to use a molding strip 102 associated with the drive unit 104 compared to conventional forming devices (such as rollers) in which the molding cavity is directly produced.

[0127] The use of the molding strip 102 is particularly noteworthy in terms of modularity. Unlike solid rollers (whose disassembly and reinstallation are particularly complex to perform), the molding strip can be easily removed and replaced from the drive unit. This advantage is especially observed when the two rollers 104A, 104B are fixed to the frame on the same side, leaving the other end free for the introduction / removal of the molding strip. Devices for guiding the molding strip can also be used to facilitate its introduction and / or removal.

[0128] Furthermore, the production of molded strips is extremely simplified compared to the production of rollers that include molded cavities. Such rollers are typically produced by stacking continuous sheets, thus requiring multiple machining operations and inducing significant stress during assembly and with each change in the reference of the hook. They also have significant mass and need to be held at both ends, thus complicating their replacement.

[0129] At the location where the retaining element 16 is desired to be formed, the cavity 102C in the molding strip 102 can be produced by a chemical etching process or by using a laser. It is also conceivable to produce a molding strip 102 having cavities 102C uniformly distributed throughout the molding strip 102, and then plugging the cavities 102C at the location where it is desired to form a region 20 without the retaining element 16.

[0130] More specifically, in order to define different configurations in the arrangement of retaining elements, and thus define a strip having retaining elements arranged to form a pattern, the cavity 102C of the molding strip 102 has a configuration similar to that of the retaining elements. In the material forming the molding strip 102, the cavity 102C is formed directly from the molding strip 102.

[0131] However, it should be understood that creating cavities 102C in the molding strip 102 is quite complex, especially in the case of uneven distribution.

[0132] Therefore, cavities 102C can be uniformly formed on the molding strip 102, and a portion of the cavity thus formed can be at least partially closed, while another portion of the cavity remains unclosed. Thus, this complete or partial closure of a portion of the cavity 102C allows for the definition of two subgroups of cavities: functional cavities and non-functional cavities.

[0133] "Functional cavity" refers to a cavity that can be filled with molding material to form a retaining element or a preform of a retaining element.

[0134] "Non-functional cavities" refer to cavities that are completely or partially closed, so that molding material cannot penetrate them to form a retaining element or a preform of a retaining element. However, it should be understood that non-functional cavities may cause irregularities during the formation of the retaining device due to possible material removal; however, these irregularities are smaller in size compared to the retaining element or the preform formed by functional cavities, typically at least a factor of 5 smaller along a direction perpendicular to the upper surface 12A of the base 12. In some cases, in at least one cross-sectional view perpendicular to the inner surface, the cavity 102C of the molding strip 102 has a dimension W1 at the inner surface of the molding strip that is larger than the dimension W2 at the outer surface of the molding strip in that view, to allow for improved peel value. In other cases, in at least one cross-sectional view perpendicular to the inner surface, the cavity 102C of the molding strip 102 has a dimension W1 at the inner surface of the molding strip that is smaller than the dimension W2 at the outer surface of the molding strip in that view, to improve demolding. The ratio between W1 and W2 is, for example, between 0.7 and 1.2, and especially between 0.8 and 1.2, to achieve a good trade-off between peel strength and ease of demolding.

[0135] The material used to achieve complete or partial closure of the cavity 102C is a plugging material, which is typically different from the injection material (or molding material). The plugging material is, for example, a resin. The plugging material can be formed as a single layer or as several deposited layers, typically, for example, between 2 and 20 consecutively deposited layers.

[0136] The plugging material may extend onto the outer and / or inner surfaces of the molding strip. According to one example, a portion of the set of cavities 102C is at least partially enclosed by the plugging material, such that at least two separate regions filled with the plugging material exist in each cavity. According to another example, a portion of the cavity 102C is at least partially enclosed by the plugging material, such that each cavity 102C has a region with plugging material and a region without plugging material. The cavity 102C is a through cavity, and the region without plugging material is typically a through region. Therefore, the plugging material allows for a reduction in the cross-section of the through cavity. Subsequently, the plugging material is partially removed, for example, by laser ablation.

[0137] According to one example, 10% to 90% (or 20% to 80%) of the total number of cavities 102C of the molded strip 102 are at least partially closed.

[0138] According to one example, a cavity 102C located at a distance of less than or equal to 10 mm from the boundary of a molding strip 102 extending along the machine direction MD in the lateral direction CD is closed.

[0139] In some cases, the cavity located at a distance between 2 and 5 mm (in some cases between 1 and 5 mm, in others between 2 and 7 mm, or even between 1 and 10 mm) from the boundary of the molding strip 102 extending along the machine direction MD in the lateral direction CD is closed.

[0140] Alternatively, all cavities 102C of the molding strip can be closed in the first step, and then the blocking material can be removed from a portion of the cavities 102C in the second step.

[0141] Alternatively, the cavity 102C can be created in the molded strip 102, which initially does not have a cavity 102C, by drilling (especially by laser drilling). Therefore, this method allows the cavity 102C to be created only at the desired location.

[0142] Alternatively, the molded strip 102 can be formed by a differentiated growth process (e.g., by electroforming, known in the printing industry) to prevent the growth of a metallic material (e.g., nickel) by locally positioning the resin deposit in some areas that will subsequently define the cavity. Alternatively, the molded strip 102 can be formed by a differentiated attenuation process (e.g., by an etching process).

[0143] The cavity 102C can have the same or different shapes.

[0144] As will be seen later, cavity 102C can be arranged in different patterns.

[0145] Figure 3 In the accompanying drawings, reference numeral C denotes the separation between the strip 26 and the molding strip 102, a point corresponding to, for example, the level at which the base 12 of the strip 26 no longer contacts the molding strip 102. It can be assumed that the molding strip 102 blocks the release roller 108, that is, the release roller 108 forms a lever in the molding strip 102 to facilitate the demolding of the preform and / or hook.

[0146] In the example shown, the cavity 102C of the molding strip 102 is a through cavity. Therefore, the device may include elements (such as a scraper 110) positioned to scrape the inner surface 102A of the molding strip 102 when necessary to remove excess molding material. "Injection" refers to the action of shaping molding material through a melt process, such as dispensing, supplying, molding, injection, or extrusion.

[0147] The aforementioned equipment and related methods may also include means and steps for associating strips 22 of nonwoven (or woven) material with base 12.

[0148] This association of the strip 22 on the base 12, which includes the retaining element 16, is typically achieved by adhesive, or by melting the base or strip and / or by mechanical anchoring.

[0149] In order to secure, for example, a strip 22 of nonwoven material to the base 12 of the retaining device 10, the proposed device 100 may include a strip 22 driving device adapted to perform strip supply and to apply the strip to the lower surface 12B of the base 12 downstream of the material dispensing device 106.

[0150] Figure 4 and Figure 5 An example of a device 100 including such a device is illustrated schematically.

[0151] The device shown is similar to the previously referenced device. Figure 3 The proposed device; therefore, common components will not be described here.

[0152] like Figure 4 and Figure 5 As shown, the proposed device includes a strip drive 112 (consisting of two rollers 112A and 112B) configured to supply strip 22 downstream of the material dispensing device 106.

[0153] Strip 22 is typically a layer of nonwoven material, thermoplastic film, elastic film, or composite film, or a group of thermosetting fibers and / or filaments. Strip 22 is, for example, a web of fibers and / or filaments.

[0154] exist Figure 4 and Figure 5 In the example shown, the strip is represented as a layer of nonwoven material.

[0155] The substrate driving device 110 is configured to supply the strip 22 to the device and apply the strip 22 to the lower surface 12B of the base 12 downstream of the material dispensing device 106.

[0156] The substrate driving device 110 is configured to apply the material before the base 12 is cured. Therefore, the application causes the strip 22 to penetrate at least partially beyond the plane defined by the lower surface 12B of the base 12. Reference numeral B in the figure identifies the contact point between the base 12 and the strip 22.

[0157] More specifically, the lower surface 12B of the base 12 is substantially flat and defines a plane. In the case where the strip 22 is a layer of nonwoven material within the base 12, applying the substrate to this surface causes multiple portions of the strip 22 (e.g., fibers and / or filaments of the nonwoven material) to penetrate through the lower surface 12B of the base 12.

[0158] If this application is performed before the base 12 is cured, it is not necessary to heat the base 12 and / or strip 22 to achieve this bond.

[0159] For example, considering a base 12 made of polypropylene, when the lower surface 12B of the base 12 has a temperature between the melting temperature of the material and the softening temperature Vicat B of the material constituting it minus 30°C, or between the melting temperature of the material constituting it and the softening temperature Vicat A of the material constituting it, the substrate is typically applied to the lower surface 12B of the base 12. More specifically, when the base comprises a polypropylene-based material, the lower surface 12B of the base 12 has a temperature between 75°C and 150°C, typically about 105°C, which is usually measured using an infrared or laser camera. "Softening temperature VICAT" refers to the temperature obtained according to one of the methods described in ISO 306 or ASTM D 1525 standards, where the heating rate is 50°C / h, the normalized load of VICAT B is 50 N, and the normalized load of VICAT A is 10 N.

[0160] Strip 22 can be applied uniformly or unevenly to the lower surface 12B of the base 12.

[0161] The bonding between strip 22 and base 12 can be achieved uniformly or non-uniformly.

[0162] In the case where strip 22 is a set of thermosetting fibers and / or filaments, bonding with base 12 is also achieved by penetrating a portion of the fibers and / or filaments of strip 22 into base 12.

[0163] When strip 22 is a group of materials, such as thermosetting fibers and / or filaments, thermoplastic films, elastic films, or composite films, shrinkage of the base 12 occurs during its cooling due to bonding with the base. This shrinkage benefits the bonding surface between the substrate and the base of the strip. This shrinkage has no impact on the visual appearance for the end user.

[0164] Even when strip 22 is a single layer of nonwoven material, it is still possible for a weight of less than 80 g / m². 2 Nonwoven materials (material weight per square meter, in grams) also easily allow for hook release. For example, the weight per square meter of nonwoven material can be as low as 5 g / m². 2 With 120g / m 2 Between, or 25g / m 2 With 100g / m 2 Between, or 10g / m 2 With 70g / m 2 between.

[0165] When strip 22 is a layer of nonwoven material, the apparatus may include a calendering device located upstream of the substrate driving device 112, so that the calendering step may be performed (or not performed) on the nonwoven material layer before it is applied to the base 12.

[0166] This mode of fixing the strip 12 to the base 12, which includes the retaining element 16, is particularly advantageous because it does not cause deformation of the base 12 and thus advantageously allows the obtained shape of the base 12 to be maintained during the injection step, and in particular, maintains the straight edges that can be obtained by the aforementioned methods and equipment.

[0167] This method of securing the substrate to the strip can be applied to the methods for forming strips as described above, or more generally to any other method for forming strips that include retaining elements (such as hooks only).

[0168] Figure 6 and Figure 7 The following are examples of methods used: Figure 4 The device 100 obtains a view of the band portion 26 and the separately obtained pattern 14.

[0169] The proposed strip portion 26 has several separate patterns 14, each pattern 14 being formed by multiple retaining elements.

[0170] Each pattern 14 is surrounded by an area without retaining elements, thereby defining a flat or substantially flat area on the upper surface 12A of the base 12.

[0171] Pattern 14 is formed by consecutive rows and columns of retaining elements, which are arranged along the primary direction DP and the secondary direction DS, respectively. Each row and column is formed by one or more retaining elements, which are aligned along the secondary direction DS or the primary direction DP, if necessary. A row of retaining elements typically includes 1 to 1,000 retaining elements, more particularly 2 to 500 retaining elements. A column of retaining elements typically includes 1 to 1,000 retaining elements, more particularly 2 to 750 retaining elements.

[0172] The base 12 typically has a constant width, which is usually measured along the primary direction DP or the secondary direction DS.

[0173] The primary direction DP typically corresponds to the machine direction MD of the aforementioned molding strip 102, while the secondary direction DS typically corresponds to the transverse direction CD of the aforementioned molding strip 102.

[0174] Different rows and columns are typically evenly spaced according to secondary and primary intervals, respectively. The primary and secondary intervals may be equal or different. Alternatively, the rows may be evenly spaced according to a first primary interval and a second primary interval, where the second primary interval is not an integer multiple of the first primary interval and the first primary interval is less than the second primary interval; and / or the columns may be evenly spaced according to a first primary interval and a second primary interval, where the second primary interval is not an integer multiple of the first primary interval and the first primary interval is less than the second primary interval.

[0175] Each pattern 14 is typically surrounded by an area on the upper surface of the base without retaining elements, the area having dimensions that are strictly greater than twice the primary spacing along the primary direction DP and / or strictly greater than twice the secondary spacing along the secondary direction DS.

[0176] The retaining elements 16 that define rows and columns can be aligned or arranged in an interleaved manner, which is particularly due to the construction of the cavity 102C of the molded strip 102 used to manufacture the retaining device, as described above.

[0177] Each pattern 14 is typically surrounded by an area without retaining elements on the upper surface 12A of the base 12, and is typically located at a distance of at least 1.5 mm (in some cases at least 2.5 mm) from the boundary of the upper surface 12A of the base 12. “Boundary of the base 12” means the end of the base 12, for example, along the primary direction DS or along the secondary direction DS.

[0178] exist Figure 7 The different rows and columns of the retaining element are identified in the text.

[0179] The accompanying figure identifies rows L1 to L9 that extend continuously from one end of pattern 12 along the primary direction DP, and columns C1 to C5 that extend within pattern 12.

[0180] For a given pattern, retain element 16 is counted on each row from L1 to L9.

[0181] exist Figure 7 In the case of the pattern shown, the row has the following number of holding elements: L1: 4; L2: 8; L3: 9; L4: 10; L5: 11; L6: 12; L7: 13; L8: 12; L9: 17.

[0182] In the same way, for Figure 7 The pattern shown keeps element 16 counted on each of columns C1 to C5: C1: 27; C2: 26; C3: 27; C4: 26; C5: 25.

[0183] Therefore, the proposed pattern 12 has at least two rows and / or two columns with different numbers of holding elements. More generally, the proposed pattern has at least X rows and / or X columns of holding elements with different numbers of holding elements, where X equals 2, or even in some cases equals 3, 4, or 5, or more generally X is between X... 最小值 With X 最大值 Natural numbers between X and X 最小值 It can be equal to, for example, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, or 20, and X 最大值 It can be equal to, for example, 500, 450, 400, 350, 300, 250, 200, 150, 100 or 50.

[0184] The resulting patterns can have different shapes, unlike the continuous and uniform patterns usually produced to hold elements together.

[0185] Furthermore, for a given pattern, at least two rows and / or columns have different numbers of holding elements, and the difference between the number of holding elements in the two rows or columns is greater than or equal to 1, or more specifically greater than or equal to 2, or even greater than or equal to 3, 4 or 5.

[0186] exist Figure 7 In the example shown, considering rows L1 to L9 and columns C1 to C5, the pattern thus includes:

[0187] - 3 columns with different numbers of holding elements, where the difference between the numbers of holding elements is greater than or equal to 1 (e.g., columns C1, C2, and C5).

[0188] - Two columns with different numbers of holding elements, where the difference between the numbers of holding elements is equal to 2 (e.g., columns C1 and C5).

[0189] -8 rows of different numbers of holding elements, where the difference between the numbers of holding elements is greater than or equal to 1 (e.g., L1, L2, L3, L4, L5, L6, L7, L9).

[0190] -2 rows with different numbers of holding elements, where the difference between the numbers of holding elements is equal to 4 (e.g., L1 and L2, or L2 and L8).

[0191] Furthermore, for each pair of rows or columns arranged consecutively, the variation in the number of retaining elements between the rows or columns of the pair is typically less than or equal to 10, or less than or equal to 15.

[0192] More generally, for each pair of rows or columns in a continuous arrangement, the variation in the number of retaining elements between the rows or columns of the pair is typically less than or equal to 40%, 30%, or 15% of the maximum number of retaining elements for the rows of the pattern. For each pair of columns in a continuous arrangement, the variation in the number of retaining elements between the rows or columns of the pair is typically less than or equal to 40%, 30%, or 15% of the maximum number of retaining elements for the columns of the pattern. This characteristic allows for adjustment of the force required to disengage from the retaining device when the retaining element is engaged with a complementary element (such as a retaining element or nonwoven material). This product is also easier to manufacture, especially easier to demold from the molding device.

[0193] In addition, Figure 7 In the illustrated embodiment, pattern 12 is defined by rib 13, which forms a continuous profile around pattern 14A. In the illustrated example, rib 13 has a rectangular cross-section. However, it should be understood that rib 13 bordering pattern 14A can have any cross-section and can be continuous or discontinuous.

[0194] Figures 8 to 11 Other examples of patterns that can be formed by retaining elements (and therefore by cavities used to form retaining elements) are shown.

[0195] These figures illustrate the primary direction DP and the secondary direction DS.

[0196] Already referred to Figure 7 The different relationships between the number of holding elements or cavities for different rows and columns of a pattern, as described, also apply. Figures 8 to 11 The pattern presented in the middle.

[0197] The different patterns presented here are inscribed within an outer contour (in this case, a circle), which has a diameter of, for example, about 24 mm, or more generally, between 10 mm and 45 mm. The patterns here are formed by areas within the outer contour that do not contain retaining elements. It should be understood that the geometry of the outer contour can vary and is not limited to a circle.

[0198] exist Figure 8 In the case of the pattern shown, the area without retaining elements defines the lotus-type pattern. Figure 9 In the case of the pattern shown, the area without retaining elements defines the pattern representing a rose. Figure 10 In the case of the pattern shown, the area without retaining elements defines the pattern representing a flower. Figure 11 In the case of the pattern shown, the area without retaining elements defines the pattern representing burdock flowers. Figure 12 yes Figure 10 A variant of . Figure 13 yes Figure 9 A variant of .

[0199] As can be seen in these figures, the density of the retaining element (or cavity) can be varied. Figure 8 , Figure 9 , Figure 11 and Figure 12 Therefore, it is shown that approximately 1093 retaining elements (or cavities) / cm are used. 2 The pattern generated by the density of the retaining element (or cavity), while Figure 10 and Figure 13 It presents a method utilizing approximately 273 retaining elements (or cavities) / cm 2 The pattern generated by the density of the retaining element (or cavity).

[0200] Such as in these Figures 8 to 13 As can be seen, for each pattern, at least one row and / or at least one column includes at least two separate sets of retaining elements (or cavities), which are separated by areas without retaining elements or cavities.

[0201] "A region without a retaining element or cavity" refers to a region in which a retaining element or cavity would normally already exist, by conforming to the spacing of the retaining element or cavity.

[0202] Given that the rows and columns of the retaining elements are evenly spaced according to the secondary and primary intervals, respectively, at least one region without a retaining element contained in the area defined by the outer contour of each pattern has a dimension along the primary direction DP that is strictly greater than twice the primary interval, and a dimension along the secondary direction DS that is strictly greater than twice the secondary interval.

[0203] In the same manner, taking into account that the rows and columns of the cavity are evenly spaced according to the lateral spacing and the machine spacing respectively, at least one region without a retaining element contained in the area defined by the outer contour of each pattern has a size along the machine direction MD that is strictly greater than twice the machine spacing, and a size along the lateral direction CD that is strictly greater than twice the lateral spacing.

[0204] According to one example, for each pattern, the ratio between the surface of the region containing no retaining element (or cavity) within the outer contour and the surface containing the retaining element (or cavity) is less than 1. The surface of the pattern is defined as the surface covered by circles having radii corresponding to an average spacing, and in a top view, the centers of these circles are respectively located at the centers of the retaining elements (or cavities), and the circumference of each circle passes through the center of at least one adjacent retaining element (or cavity). The average spacing may correspond to the distance separating two adjacent retaining elements (or cavities). At least one region without a retaining element is a surface not covered by the pattern surface.

[0205] According to one example, for each pattern, at least one (or each) region of a retaining element (or cavity) not included in the pattern has a width and a length such that the ratio between the length and the width is strictly greater than 1.2, and in particular strictly greater than 1.5.

[0206] According to one example, the pattern (or each) is defined by an outer contour, and the pattern (or each) includes at least one region without retaining elements (or cavities) in the area defined by its outer contour. The inner contour has at least one elongated local portion defining a local centerline, which is arranged at a distance less than 20% (particularly less than 15%) of the pattern size along the primary and / or secondary directions from the local inner contour, or alternatively or additionally, at a distance less than 10 mm (or less than 5 mm, particularly less than 3 mm, more particularly less than 2 mm, more particularly less than 1 mm) and greater than (or strictly greater than) the average spacing of the retaining elements in the pattern. This centerline Lm... Figure 9 As shown in the diagram. Circular areas without retaining elements do not have the median value as defined in this document. Therefore, the retaining device provides maximized grip while allowing for more detailed and precise representation of the pattern. Local center lines include straight and / or curved portions. The length of the center line of at least one inner contour is typically greater than 10 mm, or, for example, greater than 12 mm. The sum of the lengths of the center lines of the inner contours of the pattern is typically greater than 12 mm, for example, greater than 15 mm, and / or typically less than 600 mm, for example, less than 400 mm, more particularly less than 200 mm. The sum of the lengths of the center lines of the inner contours of the pattern is typically greater than 12 mm, for example, greater than 15 mm, and / or typically less than 600 mm, for example, less than 400 mm, more particularly less than 200 mm.

[0207] In addition to or independently of the aforementioned characteristics, the retaining element 16 may be manufactured having a rod extending from the base 12 and a head extending from the end of the rod opposite to the base. Subsequently, the retaining element 16 is generally manufactured such that, for a given pattern 14, the size of the head of the retaining element of the pattern decreases between the first end and the second end of the pattern.

[0208] More specifically, considering a given pattern, typically for each pattern of the strip, a first direction of the pattern is defined, which may be, for example, a primary direction DP or a secondary direction DS, and retaining elements 16 are determined to form a first end and a second end of the pattern along the first direction. Each retaining element 16 has a head having a maximum size measured along the second direction. The head of the retaining element 16 forming the first end of the pattern has a first maximum size. The head of the retaining element forming the second end of the pattern has a second maximum size. The second maximum size is strictly smaller than the first maximum size. The retaining elements 16 forming the first end and the retaining elements 16 forming the second end are arranged in the same column or row. The first direction is direction MD. The direction from the first end to the second end is direction MD.

[0209] According to one embodiment, the maximum size of the head of the element is maintained by decreasing from the first end of the pattern to the second end, typically by a strict reduction.

[0210] According to one example, the ratio of the second maximum size to the first maximum size is between 1.01 and 1.60, particularly between 1.01 and 1.35, more particularly between 1.02 and 1.15, and in some cases between 1.03 and 1.12.

[0211] By taking into account the peeling force from the first end of the pattern to the second end, this variation in the maximum size of the retaining element's head allows for adjustment of the force required to detach from the retaining element.

[0212] The retaining device typically has a 180° peel force along the primary direction DP and / or along the secondary direction DS, which is strictly greater than 0.02N (strictly greater than 0.1N in some cases).

[0213] The “180° peel” method is a method that allows for the measurement of peel force (i.e., the force that separates the component (here, the retaining device) from the area to which it is applied). The method is described below.

[0214] Sample conditioning - Condition the test sample at 23℃ + / - 2℃ and 50% + / - 5% relative humidity for 2 hours.

[0215] Preparation of the holding device – The holding device is typically in the form of a belt, the length of which is along the primary direction DP or the secondary direction DS. A portion of the belt along the primary direction DP or the secondary direction DS is bonded to an 80 g / cm² length. 2The paper is placed on a 2kg roller, which rotates or is applied to the retaining device along the entire length of the strip in one direction and then in the other (back and forth). The paper and retaining device are cut into 25.4mm wide strips along the primary direction DP or secondary direction DS at a rate of approximately 700mm / min using a cutting tool. Each strip has a length of 210mm, and an anti-slip strip is positioned at the center of the strip.

[0216] Preparation of the application region - for example, depending on the size of the holding device, the sample of the application region has a width of 50 mm along the primary direction DP or the secondary direction DS, and a maximum length of 200 mm, and the sample is cut in half according to the length.

[0217] Assembly – The belt is positioned over the sample in the application area, with the holding device centered on the sample. A 2 kg roller rotates or is applied to the belt at a rate of approximately 700 mm / min along its entire length in one direction and then in the other (back and forth). The sample from the application area is placed in the clamps of the gallows, with the cut side in the clamps, and a 1 kg weight is suspended from the bottom of the belt for 10 seconds. The weight is then removed. This step ensures the assembly of the holding device and the sample from the application area.

[0218] Measurement – ​​The assembly is then set up in a tensile testing machine including a 100 N (Newton) measuring unit. The band is inserted into the (movable) upper jaw. The force measuring unit reading is set to zero. The sample of the application area is inserted into the (fixed) lower jaw, generating slight tension. The force should be between 0.02 N and 0.05 N. During setup, the jaws are spaced 50 mm apart. The assembly is centered between the two jaws. The test is performed at a constant displacement at a rate of 305 mm / min, with a test duration of 50 mm. This test duration is adjusted according to the width of the retaining device under test.

[0219] In order to produce the belt 26 with such retaining element 16, it should be understood that the molded strip 102 for the device 100 has a cavity 102C with a structure similar to that of the retaining element.

[0220] Therefore, it should be understood that, in order to form a given pattern of the retaining element, the molding strip 102 used has functional cavities 102C arranged in a similar pattern. Non-functional cavities will be understood here as having no cavities.

[0221] More generally, the molding strip 102 has a plurality of cavities 102C arranged in rows and columns extending along the lateral direction CD and the machine direction MD, respectively, and the cavities 102C open outward to the outer surface of the molding strip 102.

[0222] A single cavity typically contains 1 to 1,000 cavities. A column of cavities typically contains 1 to 1,000 cavities.

[0223] Cavities 102C are arranged to form patterns, typically separate patterns, on the outer surface of the molding strip 102. Each pattern is formed by multiple rows and columns of cavities 102C.

[0224] Different patterns are usually separated.

[0225] The molding strip may have one or more patterns that can be repeated on the molding strip.

[0226] Different rows and columns are typically evenly spaced according to horizontal and machine intervals, respectively. The horizontal and machine intervals may be equal or different. According to another example, the rows are evenly spaced according to a first horizontal interval and a second horizontal interval, where the second horizontal interval is not an integer multiple of the first horizontal interval and the first horizontal interval is less than the second horizontal interval; and / or the columns are evenly spaced according to a first and a second machine interval, where the second machine interval is not an integer multiple of the first machine interval and the first machine interval is less than the second machine interval.

[0227] Each pattern is typically surrounded by an area without retaining elements on the outer surface of the molded strip, the area having dimensions that are strictly greater than twice the machine spacing along the machine direction MD and / or strictly greater than twice the lateral spacing along the lateral direction CD.

[0228] The cavities 102C that define rows and columns can be aligned or arranged in an interleaved manner.

[0229] Each pattern is typically surrounded by a cavity-free area on the outer surface of the molding strip and is usually located at a distance of at least 1.5 mm (in some cases at least 2.5 mm) from the boundary of the outer surface of the molding strip. "Boundary of the molding strip" means, for example, the end of the molding strip along the machine direction MD or along the transverse direction CD.

[0230] As for the retaining element, the pattern formed by the cavities therefore has at least two rows and / or two columns with different numbers of cavities. More generally, the proposed pattern presents at least Y rows and / or Y columns with different numbers of cavities, where Y equals 2, or in some cases equals 3, 4, or 5, or more generally Y is between Y 最小值 With Y 最大值 The natural numbers between Y, where Y 最小值 It can be equal to, for example, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, or 20, while Y 最大值 It can be equal to, for example, 500, 450, 400, 350, 300, 250, 200, 150, 100 or 50.

[0231] Furthermore, for a given pattern, at least two rows and / or columns have different numbers of cavities, and the difference in the number of cavities between the two rows or columns is greater than or equal to 1, or more specifically greater than or equal to 2, or greater than or equal to 3, 4 or 5.

[0232] Furthermore, for each pair of rows or columns arranged in a continuous manner, the variation in the number of cavities between the rows or columns of the pair is typically less than or equal to 10, or even less than or equal to 15.

[0233] More generally, for each pair of consecutive rows, the variation in the number of cavities between the rows or columns of the pair is typically less than or equal to 40%, 30%, or 15% of the maximum number of cavities used for the row pattern. For each pair of consecutive columns, the variation in the number of cavities between the rows or columns of the pair is typically less than or equal to 40%, 30%, or 15% of the maximum number of cavities used for the column pattern.

[0234] Alternatively, the design can have other shapes, such as the shape of other flowers, such as chrysanthemums, thistles, or cotton, or, for example, animals, logos, words, or "QR codes".

[0235] Alternative Figures 6 to 13 The pattern can be oriented differently, for example, at a 90-degree angle.

[0236] Although the invention has been described with reference to specific exemplary embodiments, it will be apparent that modifications and changes can be made to these examples without departing from the general scope of the invention as defined in the claims. In particular, individual features of different illustrated / mentioned embodiments may be combined in other embodiments. Therefore, the description and drawings should be considered in an illustrative rather than restrictive sense.

[0237] It is equally clear that all the characteristics described with reference to a method can be applied individually or in combination to a device, and conversely, all the characteristics described with reference to a device can be applied individually or in combination to a method.

Claims

1. A holding device (10), comprising: - A base (12) having an upper surface (12A) and a lower surface (12B), the base (12) extending along a primary direction (DP), having a width defined along a secondary direction (DS) perpendicular to the primary direction (DP), and a thickness measured along a direction perpendicular to both the primary direction (DP) and the secondary direction (DS). - A plurality of retaining elements (16) extending on the upper surface (12A) of the base (12), each retaining element (16) including a rod (18), the retaining elements (16) being integrally formed with the base (12), the retaining elements (16) being arranged in multiple rows and columns extending along the secondary direction (DS) and the primary direction (DP), respectively, each retaining element having a head. The device is characterized in that: The retaining device has at least X rows and / or X columns with different numbers of retaining elements (16), where X equals 2. The plurality of retaining elements form one or more separate patterns, each pattern being formed by multiple rows and columns of retaining elements (16), and wherein for each pattern, the maximum size of the head of the retaining element decreases along the secondary direction (DS) from the first end of the pattern toward the second end of the pattern. The head of the retaining element (16) forming the first end of the pattern has a first maximum size, and the head of the retaining element forming the second end of the pattern has a second maximum size, the second maximum size being strictly smaller than the first maximum size. The retaining element (16) forming the first end and the retaining element (16) forming the second end are arranged in the same column or row.

2. The holding device (10) according to claim 1, wherein, The retaining device has at least two rows and / or at least two columns with different numbers of retaining elements, and the difference between the number of retaining elements in the at least two rows and / or at least two columns is greater than or equal to 1.

3. The holding device (10) according to claim 1, wherein, The retaining device has at least two rows and / or at least two columns with different numbers of retaining elements, and the difference between the number of retaining elements in the at least two rows and / or at least two columns is greater than or equal to 2.

4. The holding device (10) according to claim 1, wherein, The retaining device includes a strip, The strip is a layer of nonwoven material, thermoplastic film, elastic film, or composite film, or a group of thermosetting fibers and / or filaments, and The base is molded onto the strip or bonded to the strip.

5. The holding device (10) according to claim 4, wherein, For each pattern, each pair of rows arranged continuously along the primary direction (DP) has a plurality of holding elements, the number of which varies by no more than 10 holding elements.

6. The holding device (10) according to claim 4, wherein, For each pattern, each pair of rows arranged continuously along the primary direction (DP) has a plurality of holding elements, the variation being less than or equal to 5 holding elements.

7. The holding device (10) according to claim 1, wherein, For each pattern, each pair of columns arranged continuously along the secondary direction (DS) has a plurality of holding elements (16), the number of which varies by no more than 15.

8. The holding device (10) according to claim 1, wherein, For each pattern, each pair of columns arranged continuously along the secondary direction (DS) has a plurality of holding elements (16), the number of which varies by no more than 5 holding elements.

9. The holding device (10) according to claim 1, wherein, Each pattern is completely surrounded by the area of ​​the upper surface (12A) of the base (12) without the retaining element (16) and is located at a distance greater than 1.5 mm from the boundary of the base (12).

10. The holding device (10) according to claim 1, wherein, Each pattern is completely surrounded by the area of ​​the upper surface (12A) of the base (12) without the retaining element (16) and is located at a distance greater than 2.5 mm from the boundary of the base (12).

11. The holding device (10) according to claim 1, wherein, Each pattern is completely surrounded by the area of ​​the upper surface (12A) of the base (12) without the retaining element (16) and is located at a distance greater than 1.5 mm from all boundaries of the base (12).

12. The holding device (10) according to claim 1, wherein, Each pattern is completely surrounded by the area of ​​the upper surface (12A) of the base (12) without the retaining element (16) and is located at a distance greater than 2.5 mm from all boundaries of the base (12).

13. The holding device (10) according to claim 1, wherein, Each pattern is defined by an outer contour (14A), and each pattern includes at least one area without retaining elements in the region defined by its outer contour (14A).

14. The holding device (10) according to claim 13, wherein, Each pattern has at least one row and / or at least one column, including at least two separate sets of retaining elements (16) separated by areas without retaining elements (16).

15. The holding device (10) according to claim 13, wherein, For each pattern, the region including at least one retaining element (16) in the pattern has a width and a length such that the ratio between the length and the width is strictly greater than 1.

2.

16. The holding device (10) according to claim 13, wherein, For each pattern, the region including at least one retaining element (16) in the pattern has a width and a length such that the ratio between the length and the width is strictly greater than 1.

5.

17. The holding device (10) according to claim 13, wherein, For each pattern, the area of ​​each region without a retaining element (16) in the pattern has a width and a length such that the ratio between the length and the width is strictly greater than 1.

2.

18. The holding device (10) according to claim 13, wherein, For each pattern, the area including each region without a retaining element (16) in the pattern has a width and a length such that the ratio between the length and the width is strictly greater than 1.

5.

19. The holding device (10) according to claim 1, wherein, The rows and columns are evenly spaced according to the secondary and primary intervals, respectively.

20. The holding device (10) according to claim 19, wherein, Each pattern is completely surrounded by an area of ​​the upper surface (12A) of the base (12) without retaining elements (16), the area having a size that is strictly greater than twice the primary spacing along the primary direction (DP) and / or strictly greater than twice the secondary spacing along the secondary direction (DS).

21. The holding device (10) according to claim 13 or 19, wherein, The region without at least one retaining element (16) in the area defined by the outer contour (14A) of each pattern has a dimension that is strictly greater than twice the primary interval along the primary direction (DP) and a dimension that is strictly greater than twice the secondary interval along the secondary direction (DS).

22. The holding device (10) according to claim 13, wherein, For each pattern, the ratio between the surface of the region without the retaining element (16) in the outer contour (14A) of the pattern and the surface including the retaining element (16) is less than 1.

23. A molding apparatus (100) for forming, for example, a retaining device according to any one of the preceding claims, the molding apparatus (100) comprising a molding strip (102) adapted to be mounted on a support (104), the molding strip (102) extending along a machine direction (MD) having a width defined along a transverse direction (CD) perpendicular to the machine direction (MD) and a thickness measured along a direction perpendicular to both the machine direction (MD) and the transverse direction (CD), the molding strip having opposing inner and outer surfaces, the molding strip (102) having a plurality of cavities (102C) arranged in multiple rows and columns extending respectively along the transverse direction (CD) and the machine direction (MD), the cavities (102C) opening outwardly onto an outer surface (102B) of the molding strip (102), each cavity including a portion for forming a retaining element of the retaining device and a portion for forming a head of the retaining element. Its features are, The molded strip (102) has at least Y rows and / or Y columns of cavities (102C) with different numbers of cavities (102C), where Y equals 2. The plurality of cavities form one or more separate patterns, each pattern being formed by multiple rows and columns of cavities, and wherein for each pattern, the maximum dimension of the portion of the cavity used to form the head of the retaining element decreases along the machine direction (MD) from a first end of the pattern toward a second end of the pattern. The head of the retaining element (16) forming the first end of the pattern has a first maximum size, and the head of the retaining element forming the second end of the pattern has a second maximum size, the second maximum size being strictly smaller than the first maximum size. The retaining element (16) forming the first end and the retaining element (16) forming the second end are arranged in the same column or row.

24. The molding apparatus (100) according to claim 23, wherein, The molding device (100) has at least two rows and / or at least two columns with different numbers of cavities (102C), and the difference between the number of cavities (102C) in the at least two rows and / or at least two columns is greater than or equal to 1.

25. The molding apparatus (100) according to claim 23, wherein, The molding device (100) has at least two rows and / or at least two columns with different numbers of cavities (102C), and the difference between the number of cavities (102C) in the at least two rows and / or at least two columns is greater than or equal to 2.

26. The molding apparatus (100) according to claim 23, wherein, The plurality of cavities (102C) form one or more separate patterns, each pattern being formed by a plurality of rows and columns of cavities (102C).

27. The molding apparatus (100) according to claim 26, wherein, For each pattern, each pair of rows arranged continuously along the machine direction (MD) has a plurality of cavities, the variation of which is less than or equal to 40% of the maximum number of cavities (102C) of the rows in each pair of rows.

28. The molding apparatus (100) according to claim 26, wherein, For each pattern, each pair of rows arranged continuously along the machine direction (MD) has multiple cavities, the variation of which is less than or equal to 30% or 15% of the maximum number of cavities in the rows of each pair of rows.

29. The molding apparatus (100) according to claim 26, wherein, Each pattern is defined by an outer contour, and each pattern includes at least one region without a cavity (102C) in the area defined by its outer contour.

30. The molding apparatus (100) according to claim 29, wherein, Each pattern has at least one row and / or at least one column, including at least two separate cavities (102C) separated by regions without cavities (102C).

31. The molding apparatus (100) according to claim 29, wherein, For each pattern, a region comprising at least one cavity (102C) in the pattern has a width and a length such that the ratio between the length and the width is strictly greater than 1.

2.

32. The molding apparatus (100) according to claim 29, wherein, For each pattern, a region comprising at least one cavity (102C) in the pattern has a width and a length such that the ratio between the length and the width is strictly greater than 1.

5.

33. The molding apparatus (100) according to claim 29, wherein, For each pattern, each region without a cavity (102C) in the pattern has a width and a length such that the ratio between the length and the width is strictly greater than 1.

2.

34. The molding apparatus (100) according to claim 29, wherein, For each pattern, each region without a cavity (102C) in the pattern has a width and a length such that the ratio between the length and the width is strictly greater than 1.

5.

35. The molding apparatus (100) according to claim 26, wherein, The columns and rows are evenly spaced according to the horizontal spacing and the machine spacing, respectively.

36. The molding apparatus (100) according to claim 35, wherein, Each pattern is completely surrounded by a cavity-free area (102C) of the outer surface (102B) of the molding strip (102), the area having dimensions that are strictly greater than twice the machine spacing along the machine direction (MD) and strictly greater than twice the lateral spacing along the lateral direction (CD).

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