Retention device and retention device tape

Abstract

The present invention relates to a retention device (10) including a longitudinally extending continuous base (12) having an upper surface (12A) and a lower surface (12B), and a plurality of retention elements (16) extending from the upper surface (12A) of the base (12), each retention element (16) including a rod (18). The base (12) includes at least one zone (20) free of retention elements such that the plurality of retention elements (16) form at least one pattern (14). The present invention also relates to a tape for a retention device. [Selected Figure] Figure 1A

Description

[Technical Field]

[0001] The present disclosure relates to retention devices that include protruding elements, such as rods and / or preforms and / or hooks, for example, that are intended to cooperate with hook and / or loop counterparts. [Background technology]

[0002] Particularly in the field of hygiene, holding devices are used which have, for example, hooks, which cooperate with loop counterparts that form the application zone of the holding device.

[0003] When the user places the holding device on this application zone, the user may doubt that the holding device has been correctly placed on the application zone. This application zone is commonly referred to in the field of "comfort web" hygiene or is identified by the expression "landing zone." The fact that the user is certain that they have correctly positioned the holding device on the application zone influences the perception that the holding device is properly held on the application zone.

[0004] Also, the user may need to change the position of the holding device on the application zone, for example to better adjust or remove an item.

[0005] The peel force is typically the force a user exerts on the retention device to separate it from the application zone. The ease with which a user can separate the retention device from the application zone affects the user's perception of the fact that the retention device is properly maintained on the application zone. In some extreme cases, a low peel force can cause unexpected separation of the retention device and the application zone.

[0006] Therefore, there is a need to improve the actual feel / quality and / or the feel / quality perceived by the user when using a retention device in a closed and / or open manner. Summary of the Invention [Problem to be solved by the invention]

[0007] The present disclosure aims to at least partially overcome these drawbacks by proposing a holding device that is simple to use, visual, cognitive and intuitive for the user. [Means for solving the problem]

[0008] To this end, according to a first aspect, the present disclosure relates to a holding device comprising: - A continuous base with an upper surface and a lower surface. a plurality of retention elements extending from the top surface of the base, each retention element including a rod; The base includes at least one zone that does not include any retaining elements, such that the plurality of retaining elements form at least one pattern, and the CIE L * a * b * In color space, the color difference ΔE between at least one zone that does not contain a retaining element and at least a part of the pattern formed by the plurality of retaining elements * is 1.0 or greater, preferably 1.5 or greater, even more preferably 3.0 or greater, and even more preferably 4.5 or greater.

[0009] By "pattern," it is understood that the distribution of the retaining elements is not uniform across the base. Thus, while the retaining elements may be uniformly spaced on the base to form the pattern, some zones of the base may be free of retaining elements, allowing the pattern to be delimited.

[0010] The pattern includes a pattern surface corresponding to a surface covered with circles of radii corresponding to an average pitch, the centers of each circle being located at the centers of the respective retaining elements when viewed from above, and the circumference of each circle passing through the centers of at least one adjacent retaining element. The average pitch may correspond to the distance separating two adjacent retaining elements. At least one zone without retaining elements is a surface not covered by the pattern surface.

[0011] The color difference ΔE between a zone without a retaining element and at least a part of the pattern formed by a plurality of retaining elements * is 1.0 or greater, allowing the user to visually identify the pattern formed by the multiple retention elements, and thus allowing the user to ensure proper positioning of the pattern on the application zone, e.g., loop counterparts, etc. This therefore allows for improved actual feel / quality and / or user-perceived feel / quality when the user uses the retention device in a closed and / or open manner.

[0012] CIE L, commonly called CIELAB * a * b * Color Space or CIE L * a * b * The color space is the most widely used space and is published by the International Commission on Illumination (CIE) to characterize surface colors. This space describes all colors visible to the human eye and was created to be used as a reference. In this space, transparency L * varies from 0 (= black) to 100 (= white), and parameter a * represents the values ​​on the axis that vary from green to red, and parameter b * represents a value on the axis varying from blue to yellow. The color difference ΔE between a zone where no retention elements are present and at least a part of a pattern formed by a plurality of retention elements * is calculated according to equation (1).

number

[0013] L * , a * and b * The values ​​are measured, for example, with a spectrophotometer in natural light (reference D65 / 10°) on a white support, X-Lite Pantone model RM200QC. This spectrophotometer is particularly suitable for 4 mm 2 Suitable for measuring surfaces of 1000mm x ....

[0014] In some embodiments, there are several zones with retaining elements, each zone being CIE L * a * b * In color space, the color difference ΔE between at least one zone that does not contain a retaining element and at least a part of the pattern formed by the plurality of retaining elements * and the color difference ΔE * is 1.0 or greater, preferably 1.5 or greater, even more preferably 3.0 or greater, and even more preferably 4.5 or greater.

[0015] In some embodiments, there are several zones with retaining elements, each zone being CIE L * a * b * In color space, the color difference ΔE between the first zone with the retaining element and the second zone with the retaining element * and the color difference ΔE * is 1.0 or greater, preferably 1.5 or greater, even more preferably 3.0 or greater, and even more preferably 4.5 or greater.

[0016] In some embodiments, the retaining element comprises a rod with a head mounted thereon.

[0017] The rod includes a lower end joined to the base and an upper end opposite the lower end, and the head extends over the upper end of the rod.

[0018] Retaining elements of this type may be, for example, preforms and / or hooks.

[0019] In some embodiments, the surface of the zone without retention elements is at least 5%, preferably at least 10%, even more preferably at least 15% of the total surface of the base.

[0020] Generally, the retaining elements are not present at the edges of the base. Thus, in the case of a retaining device that does not include a pattern, i.e., a retaining device in which the retaining elements are uniformly distributed throughout the base, there may be webs along the edges of the base that do not include the retaining elements. However, due to their straight shape, these webs do not have a sufficient surface area to allow the user to identify the pattern. Therefore, the user does not identify the presence of a zone without retaining elements as a zone that defines a pattern. It is understood that the narrow zone that generally forms the web on the edge of the retaining device is not bounded on each side by the retaining device.

[0021] In some embodiments, the pattern is a single pattern.

[0022] "Single pattern" means a pattern isolated to a zone of the base measuring 25.4 mm, 30.0 mm, or 35.0 mm in the MD and 13.0 mm, 25.0 mm, or 25.4 mm in the CD.

[0023] The "MD direction" of the abbreviation of "Machine Direction" refers to the direction in which the base moves within the machine during the manufacturing of the holding device, and the "CD direction" of the abbreviation of "Cross Direction" refers to the direction perpendicular to the MD direction.

[0024] The pattern may, for example, comprise a pattern that is recognizable by the user, such as a distinctive mark or trademark.

[0025] In some embodiments, the pattern is a repeating pattern.

[0026] The pattern may for example be of smaller dimensions compared to a single pattern, but may be repeated several times.

[0027] In some embodiments, the repeating pattern may be a complex pattern.

[0028] By "complex pattern" is meant a pattern that includes multiple entities, which may be different from each other, and which repeats itself at least once.

[0029] In some embodiments, the pattern has a closed contour.

[0030] A "closed contour" refers to a curve whose ends are congruent.

[0031] In some embodiments, the pattern is arranged such that when the retainer is biased in an open mode, the force exerted on the retainer is divided between at least a first component towards a peel force and a second component towards a shear force.

[0032] In some embodiments, in the CIE XYZ color space, the difference in opacity between at least one zone that does not contain any retaining elements and at least a portion of the pattern formed by the plurality of retaining elements is 1 or more, preferably 2 or more, and even more preferably 3 or more.

[0033] The CIE XYZ color space is a color space defined by the International Commission on Illumination. The Y component of the CIE XYZ space corresponds to luminance, i.e., the lightness of a surface. According to the standard ASTM D2805, opacity, expressed as a percentage, is calculated according to formula (2):

number

[0034] Y black background and Y white background The values ​​are measured, for example, with a spectrophotometer in natural light (under standard D65 / 10°) with an x-rite Pantone model RM200QC on a white support and on a black support.

[0035] The difference in opacity between the zone without retaining elements and at least a portion of the pattern formed by the plurality of retaining elements is equal to the absolute value of the difference in opacity values ​​obtained for the zone without retaining elements and for at least a portion of the pattern formed by the plurality of retaining elements.

[0036] In some embodiments, there are several zones with retaining elements, each zone having an opacity difference in CIE XYZ color space between at least one zone that does not contain retaining elements and at least a portion of the pattern formed by the plurality of retaining elements, the opacity difference being 1 or more, preferably 2 or more, and even more preferably 3 or more.

[0037] In some embodiments, there are several zones comprising retaining elements, each zone having an opacity difference in CIE XYZ color space between a first zone comprising retaining elements and a second zone comprising retaining elements, the opacity difference being 1 or more, preferably 2 or more, and even more preferably 3 or more.

[0038] In some embodiments, the base and the plurality of retention elements are made from a thermoplastic material.

[0039] Non-limiting examples of thermoplastic materials include polyolefins, polyethylene, LLDPE (linear low-density polyethylene), LDPE (low-density polyethylene), m-PE (metallocene polyethylene), HDPE (high-density polyethylene), EVA (ethylene vinyl acetate), and PP (polypropylene), including compositions with monomodal or multimodal (e.g., bimodal) molecular weight distributions, particularly LLDPE, and plastomers, especially polyethylene-based plastomers. Polyamides (PA), polylactic acid (PLA), polyhydroxyalkanoates (PHA), PVOH, PBS, polyesters, polyvinyl chloride (PVC), or acrylonitrile butadiene styrene (ABS) could also be used.

[0040] In some embodiments, the base and the plurality of retaining elements are made from a thermoplastic material that includes a dye.

[0041] The dye may be, for example, a white dye, such as Reference 50PP, marketed by CABOT and loaded with 50% by weight of TiO. Another dye may be UN55206, manufactured by COLOR SERVICE. These examples are given as non-limiting examples.

[0042] The dye makes it possible to increase the visual contrast between the zones without retaining elements and the pattern formed by the plurality of retaining elements.

[0043] In some embodiments, the base and the plurality of retaining elements are made from a thermoplastic material that includes at most 2% dye by weight, preferably at most 1.5% by weight, and even more preferably at most 1% dye by weight.

[0044] In some embodiments, one end of each retaining element furthest from the base includes a colored coating.

[0045] Thus, a colored coating, e.g., ink or dye, such as those commonly used in flexography and / or pad printing and / or rotogravure printing and / or serigraphy and / or heliography, can be deposited on the end of each carrier element furthest from the base. The ink can be solvent-based or water-based, or UV-crosslinkable.

[0046] Inks generally consist of three components: a colorant, in particular a pigment or dye, a medium that forms the fluid phase of the ink, such as a mixture of polymers, diluents and / or solvents or water, and a mixture of additives such as dispersants and antifoaming agents, making it possible to optimize the properties of the ink.

[0047] As mixtures of polymers it is possible to use, for example, mixtures containing up to 50% by weight of various acetates, such as ethyl acetate, N-propyl acetate, isopropyl acetate, N-butyl acetate, and mixtures thereof, and / or up to 10% by weight of alcohol.

[0048] Examples of organic or mineral pigments that can be used include diazo dyes, anthraquinone dyes, xanthenes, azines, titanium dioxide, carbon, black iron oxide, and chromium oxide.

[0049] As a non-limiting example of ink, it is possible to use the ink sold by ULTRA Ink under the reference "Type Series 30,000 ALC Polyamide" or the ink sold by DOMECK EUROFLEX under the reference "Type Series EURO-Film PXA".

[0050] It will be appreciated that this colored coating may be deposited on an uncolored or colored thermoplastic material to increase the contrast between the zones without retaining elements and the pattern formed by the plurality of retaining elements.

[0051] Typically, the ink rollers are coated with ink or dye, and the retaining device is driven so that only the retaining elements contact the ink rollers, so that the end of each retaining element farthest from the base is covered with a colored coating to enhance the visibility of the pattern.

[0052] In some embodiments, the pattern is repeated in the peel direction, and the peel force measured according to the "180° peel" method has at least two peaks and at least one valley contained between the two peaks, the maximum value of the peaks increasing with the opening stroke, and at least one valley having a minimum value of 85% or less, preferably 70% or less, even more preferably 60% or less, even more preferably 50% or less, and even more preferably 40% or less of the maximum peel force.

[0053] The "180° peel" method makes it possible to measure the peel force, i.e. the force that separates the holding device from the application zone. This method is described below.

[0054] Conditioning of Samples - The samples to be tested are conditioned at 23°C + / - 2°C and 50% + / - 5% relative humidity for 2 hours (hours).

[0055] Preparation of the retainer - The retainer is typically used in the CD direction. The retainer is typically in the form of a tape whose length is in the MD direction. The portion of the tape in the MD is 80 g / cm 2 The tape is adhered to a sheet of paper, and a 2 kg (kilogram) roller is applied or rotated in one direction to the holder and the other (back and forth) over the entire length of the tape. The paper and holder are cut into 25.4 mm (millimeter) wide strips in the CD direction using scissors at a speed of approximately 700 mm / min (millimeters per minute). Each paper strip is 210 mm long, and the holder is placed in the center of the strip.

[0056] Preparation of the application zone - The sample from the application zone has a width of 50 mm in the MD and a maximum length of 200 mm, and the sample is cut in half according to its length.

[0057] Assembly - The strip is placed on the sample from the application zone so that the holding device is centered on the sample from the application zone. A 2 kg (kilogram) roller is applied or rotated over the entire length of the strip in one direction and then the other (back and forth) at a speed of approximately 700 mm / min. The sample from the application zone is placed in the Garlo clamp with the cut edge in the clamp and a 1 kg weight is suspended under the strip for 10 seconds (s). The weight is then removed. This step makes it possible to ensure accurate assembly of the holding device and the sample from the application zone.

[0058] Measurement - The assembly is then placed in a tensile testing machine containing a 100 N (Newton) measuring cell. The strip is inserted into the upper (movable) jaw. The reading of the force measuring cell is set to zero. A sample from the application zone is inserted into the lower (fixed) jaw, creating a slight tension. The force must be between 0.02 N and 0.05 N. When mounted, the jaws are spaced 50 mm apart. The assembly is centered between the two jaws. The test is carried out with a constant displacement at a speed of 305 mm / min, with a test stroke of 50 mm. This test stroke is adapted according to the width of the holding device being tested.

[0059] It is understood that a valley is located between two successive peaks.Because peel curve is not smooth, in order to distinguish one peak from another, when the difference between the maximum values ​​of two peaks is at least 10% of the maximum value of the maximum force measured, that is, more than 10% of the maximum value of the maximum peak, it is considered that there is a new peak.Peak and valley have a point and a bottom, and the bottom can have a width that is preferably more than 1 mm, more particularly more than 2 mm, and sometimes more than 3 mm.

[0060] Due to the peel force having at least two consecutive peaks separated by a valley, the value of the peel force peak increases with the opening stroke, and the user feels this increasing force required to separate the retention device from the application zone. Thus, the user perceives that the retention device is well maintained on the application zone. Furthermore, the maximum peel force is such that the retention device is not removed from the application zone in an undesirable manner.

[0061] It is generally believed that a peeling force obtained according to the "180° peel" method of 1.8 N or more makes it possible to avoid unexpected peeling of the retaining device and application zone, and this is the case regardless of the retaining device and application zone.

[0062] In some embodiments, the pattern repeats in the peel direction, and the peel force measured according to the "180° peel" method has at least three peaks and at least two valleys, each valley being contained between two consecutive peaks, the maximum value of the peaks increasing with the opening stroke, and the valleys having a minimum value of 85% or less, preferably 70% or less, even more preferably 60% or less, even more preferably 50% or less, and even more preferably 40% or less of the maximum peel force.

[0063] In some embodiments, the device comprises a zone that does not contain a continuous retention element in a direction perpendicular to the peel direction.

[0064] In some embodiments, a zone without continuous retaining elements in a direction perpendicular to the peel direction has a width measured in the peel direction of two or more rows of retaining elements measured in the peel direction, preferably three or more rows of retaining elements measured in the peel direction.

[0065] Although these continuous zones without retaining elements have a small width, they are bounded on each side by retaining elements and therefore make it possible to define the pattern formed by the retaining elements.

[0066] In some embodiments, the zone free of continuous retention elements in a direction perpendicular to the peel direction has a width measured in the peel direction that is 1% or more, preferably 2% or more, preferably 4% or more, even more preferably 5% or more, and even more preferably 10% or more of the width of the base measured in the peel direction.

[0067] In some embodiments, the retention device comprises a woven or nonwoven web, or a thermoplastic film, or an elastic film, or a composite film.

[0068] The woven or nonwoven web, or thermoplastic film, or elastic film, or composite film serves as the base support.

[0069] "Nonwoven" refers to the product obtained at the end of the formation of a wrap of consolidated fibers and / or filaments. The consolidation may be mechanical, chemical, or thermal, resulting in the presence of bonds between the fibers and / or filaments. This consolidation may be direct, i.e., by welding, directly between the fibers and / or filaments, or indirect, i.e., by means of an intermediate layer between the fibers and / or filaments, such as a layer of adhesive or binder. The term "nonwoven" refers to a structure in the form of a tape or wrap of fibers and / or filaments entangled in a non-uniform, irregular, or random manner. Nonwovens may have a single-layer or multi-layer structure. Nonwovens can also be combined with other materials to form laminates. Nonwovens may be made from different synthetic and / or natural materials. Exemplary natural materials are cellulosic fibers such as cotton, jute, and linen, and may also include reprocessed cellulosic fibers such as rayon or viscose. Natural fibers for nonwoven materials can be prepared using various methods, such as carding. For example, synthetic materials include synthetic plastic polymers known to form fibers, including, but not limited to, polyolefins such as polyethylene, polypropylene, and polybutylene; polyamides such as polyamide 6, polyamide 6.6, polyamide 10, and polyamide 12; polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polylactic acid; polycarbonate; polystyrene; thermoplastic elastomers; vinyl polymers; polyurethanes; and mixtures and copolymers thereof. For example, nonwoven fabrics may be spunbond, spunmelt, carded thermobonded, SMS, SMMS, SS, SSSS, SSMMS, SSMMMS, air-through, and other types of nonwoven fabrics. For example, nonwoven fabrics may include different combinations of spunbond "S" and meltblown "M" layers. These examples are provided as non-limiting examples.

[0070] The web is not limited to nonwovens, but may more generally be a woven material, a knitted material, or some combination of these materials.

[0071] "Thermoplastic film" means a film made of a thermoplastic material which can be an elastic or non-elastic material.

[0072] By "thermoplastic film made of elastic material" is meant a film that can be stretched without breaking under the influence of a stretching force exerted in the transverse direction and that can substantially recover its shape and its original dimensions after relaxing this stretching force, e.g., a film that retains a residual deformation or remanence (also called permanent set or SET) after stretching and relaxation of less than 20%, more preferably less than 5%, of its initial dimension (before stretching) for an elongation of 100% of its initial dimension at room temperature (23°C).

[0073] "Thermoplastic film made of non-elastic material" means a film that does not fall within the definition of a thermoplastic film made of elastic material.

[0074] In some embodiments, the base is overmolded onto the web.

[0075] In some embodiments, the base has a thickness, measured perpendicular to the top surface of the base, of 10 μm or more, preferably 50 μm or more and 700 μm or less, preferably 500 μm or less, and even more preferably 100 μm or less.

[0076] In some embodiments, the base can have a constant or non-constant thickness between two opposing edges of the base, e.g., between two opposing edges extending in the CD or MD. The base can be continuous or discontinuous between two opposing edges of the base, e.g., between two opposing edges extending in the CD or MD.

[0077] In some embodiments, the height of the retaining element, measured perpendicular to the top surface of the base, is between 3 and 10 times the thickness of the base.

[0078] In some embodiments, the base has a thickness measured perpendicular to the top surface of the base of 10 to 700 μm, and the height of the retaining element measured perpendicular to the top surface of the base is 3 to 10 times the thickness of the base.

[0079] In some embodiments, the height of the retaining elements is 35 μm or more, preferably 55 μm or more, even more preferably 80 μm or more, and 500 μm or less, preferably 350 μm or less, even more preferably 120 μm or less.

[0080] For example, the height of the retaining element may be 80 to 350 μm, or 55 to 120 μm.

[0081] In some embodiments, the diameter at which the retaining element is inscribed (perpendicular to the retaining element in a top view) is 80 μm or more, preferably 250 μm or more and 500 μm or less, preferably 450 μm or less.

[0082] In some embodiments, the minimum distance between two retaining elements is 0.1 mm to 10 mm.

[0083] In some embodiments, the pattern is 1 cm 2 At least 20 holding elements per cm, preferably 1 cm 2 50 or more retention elements per cm, more preferably 1 cm 2 100 or more retention elements per 1cm 2 No more than 250 retaining elements per cm, preferably 1 cm 2 No more than 200 retention elements per cm, more preferably 1 cm 2 The retaining element has a density of 150 or less per unit area.

[0084] According to a second aspect, the present disclosure also relates to a retaining device comprising: a continuous base having an upper surface and a lower surface; a plurality of retaining elements extending from the top surface of the base, each retaining element including a rod. The base includes at least one zone that does not contain any retaining elements, such that the multiple retaining elements form at least one pattern, the pattern being repeated in the peel direction, such that the peel force measured according to the "180° peel" method has at least two peaks and at least one valley between the two peaks, the maximum value of the peaks increasing with the opening stroke, and at least one valley having a minimum value that is 85% or less, preferably 70% or less, even more preferably 60% or less, even more preferably 50% or less, and even more preferably 40% or less of the maximum peel force.

[0085] By "pattern," it is understood that the distribution of the retaining elements is not uniform across the base. Thus, while the retaining elements may be uniformly spaced on the base to form the pattern, some zones of the base may be free of retaining elements, demarcating the pattern.

[0086] The pattern includes a pattern surface corresponding to a surface covered with circles of radii corresponding to an average pitch, the centers of the circles being located on the centers of the retaining elements, respectively, when viewed from above. The average pitch may correspond to the distance separating two adjacent retaining elements. At least one zone without retaining elements is a surface not covered by the pattern surface.

[0087] Due to the peel force having at least two consecutive peaks separated by a valley, the value of the peel force peak increases with the opening stroke, and the user feels this increasing force required to separate the retention device from the application zone. Thus, the user perceives that the retention device is properly maintained on the application zone. Furthermore, the maximum peel force is such that the retention device is not undesirably removed from the application zone. This therefore allows for improved actual and / or perceived feel / quality when the user uses the retention device in a closed and / or open manner.

[0088] The peaks and valleys have tips and bases, and the bases preferably have widths greater than 1 mm, more particularly greater than 2 mm, and in some cases may have widths greater than 3 mm.

[0089] A peel force obtained according to the "180° peel" method of 1.8 N or more makes it possible to avoid unexpected peeling of the retaining device and application zone, which is generally considered to be possible regardless of the retaining device and application zone.

[0090] In some embodiments, the pattern repeats in the peel direction, and the peel force measured according to the "180° peel" method has at least three peaks and at least two valleys, each valley being contained between two consecutive peaks, the maximum value of the peaks increasing with the opening stroke, and the valleys having a minimum value of 85% or less, preferably 70% or less, even more preferably 60% or less, even more preferably 50% or less, and even more preferably 40% or less of the maximum peel force.

[0091] In some embodiments, the device comprises a zone that does not contain a continuous retention element in a direction perpendicular to the peel direction.

[0092] In some embodiments, a zone without continuous retaining elements in a direction perpendicular to the peel direction has a width measured in the peel direction of at least two rows of retaining elements measured in the peel direction, preferably at least three rows of retaining elements measured in the peel direction.

[0093] In some embodiments, the zone that does not include continuous retention elements in a direction perpendicular to the peel direction has a width measured in the peel direction that is 1% or more, preferably 2% or more, preferably 4% or more, even more preferably 5% or more, and even more preferably 10% or more of the width of the base measured in the peel direction.

[0094] In some embodiments, CIE L * a * b *In color space, the color difference ΔE between at least one zone that does not contain a retaining element and at least a part of the pattern formed by the plurality of retaining elements * is 1.0 or greater, preferably 1.5 or greater, even more preferably 3.0 or greater, and even more preferably 4.5 or greater.

[0095] In some embodiments, there are several zones with retaining elements, each zone being CIE L * a * b * In color space, the color difference ΔE between at least one zone that does not contain a retaining element and at least a part of the pattern formed by the plurality of retaining elements * a holding element having a color difference ΔE * is 1.0 or greater, preferably 1.5 or greater, even more preferably 3.0 or greater, and even more preferably 4.5 or greater.

[0096] In some embodiments, there are several zones with retaining elements, each zone being CIE L * a * b * In color space, the color difference ΔE between the first zone with the retaining element and the second zone with the retaining element * a holding element having a color difference ΔE * is 1.0 or greater, preferably 1.5 or greater, even more preferably 3.0 or greater, and even more preferably 4.5 or greater.

[0097] In some embodiments, the retaining device comprises a rod with a head mounted thereon.

[0098] In some embodiments, the surface of the zone without retention elements is at least 5%, preferably at least 10%, even more preferably at least 15% of the total surface of the base.

[0099] In some embodiments, the pattern is a single pattern.

[0100] "Single pattern" means an isolated pattern within a zone of the base measuring 25.4 mm or 30.0 mm or 35.0 mm in the MD and 13.0 mm or 25.0 mm or 25.4 mm in the CD.

[0101] The pattern may, for example, represent a pattern recognizable by a user, such as a distinctive sign or trademark.

[0102] In some embodiments, the pattern is a repeating pattern.

[0103] In some embodiments, the repeating pattern may be a complex pattern.

[0104] In some embodiments, the pattern has a closed contour.

[0105] In some embodiments, the pattern is arranged such that when the retainer is biased in an open mode, the force exerted on the retainer is divided between at least a first component to the peel force and a second component to the shear force.

[0106] In some embodiments, in the CIE XYZ color space, the difference in opacity between a zone containing no retaining elements and at least a portion of the pattern formed by the plurality of retaining elements is 1 or more, preferably 2 or more, and even more preferably 3 or more.

[0107] In some embodiments, there are several zones with retaining elements, each zone with retaining elements having an opacity difference in CIE XYZ color space between at least one zone that does not contain retaining elements and at least a portion of the pattern formed by the plurality of retaining elements, the opacity difference being 1 or more, preferably 2 or more, and even more preferably 3 or more.

[0108] In some embodiments, there are several zones comprising retaining elements, each zone comprising retaining elements having an opacity difference in CIE XYZ color space between a first zone comprising the retaining elements and a second zone comprising the retaining elements, the opacity difference being 1 or more, preferably 2 or more, and even more preferably 3 or more.

[0109] In some embodiments, the base and the plurality of retainers are made from a thermoplastic material.

[0110] In some embodiments, the base and the plurality of retainers are fabricated integrally.

[0111] In other words, the base and the plurality of retaining elements are made of the same material, where there is no interface at the junction between the base and the plurality of retaining elements.

[0112] In some embodiments, the base and the plurality of retaining elements are made from a thermoplastic material that includes a dye.

[0113] In some embodiments, the base and the plurality of retaining elements are made from a thermoplastic material that includes at most 2% dye by weight, preferably at most 1.5% by weight, and even more preferably at most 1% dye by weight.

[0114] In some embodiments, the end of each retainer furthest from the base includes a colored coating.

[0115] In some embodiments, the retention device comprises a woven or nonwoven web, or a thermoplastic film, or an elastic film, or a composite film.

[0116] In some embodiments, the base is overmolded onto the web.

[0117] In some embodiments, the base has a thickness, measured perpendicular to the top surface of the base, of 10 μm or more, preferably 50 μm or more and 700 μm or less, preferably 500 μm or less, and even more preferably 100 μm or less.

[0118] In some embodiments, the base can have a constant or non-constant thickness between two opposing edges of the base, e.g., between two opposing edges extending in the CD or MD. The base can be continuous or discontinuous between two opposing edges of the base, e.g., between two opposing edges extending in the CD or MD.

[0119] In some embodiments, the height of the retaining element, measured perpendicular to the top surface of the base, is between 3 and 10 times the thickness of the base.

[0120] In some embodiments, the base has a thickness measured perpendicular to the top surface of the base of 10 to 700 μm, and the height of the retaining element measured perpendicular to the top surface of the base is 3 to 10 times the thickness of the base.

[0121] In some embodiments, the height of the retaining elements is 35 μm or more, preferably 55 μm or more, even more preferably 80 μm or more and 500 μm or less, preferably 350 μm or less, even more preferably 120 μm or less.

[0122] For example, the height of the retaining element may be 80 to 350 μm, or 55 to 120 μm.

[0123] In some embodiments, the diameter at which the retaining element is inscribed (perpendicular to the retaining element in a top view) is 80 μm or more, preferably 250 μm or more and 500 μm or less, preferably 450 μm or less.

[0124] In some embodiments, the minimum distance between two retaining elements is comprised between 0.1 mm and 10 mm.

[0125] In some embodiments, the pattern is 20 / cm 2 More than 50 / cm 2 or more, and even more preferably 100 / cm 2 or more and 250 / cm 2Less than 200 / cm 2 or less, and even more preferably 150 / cm 2 The density of the retaining elements is as follows:

[0126] The present disclosure also relates to a tape for a retaining device as defined above, intended to be cut into a plurality of retaining devices. [Brief explanation of the drawings]

[0127] Other features and advantages of the object of the present disclosure will become apparent from the following description of embodiments given as non-limiting examples, with reference to the attached drawings, in which: [Figures 1A-1O] 10A-10C are schematic diagrams of a retention device according to the present disclosure having different patterns. [Figure 2] 1B is a cross-sectional view of FIG. 1A taken along section II-II. [Figure 3] 1 is a schematic diagram of an example of an apparatus for manufacturing a retention device. [Figure 4-5] 1 is a schematic diagram of an example of an apparatus for manufacturing a retention device comprising a woven or nonwoven web. [Figure 6] FIG. 1 is a schematic top view of a portion of a tape for a retention device. [Figure 7] 10 is a schematic top view of another tape for a retention device. FIG. [Figure 8] FIG. 1D is an enlarged partial view of the pattern of FIG. 1C. [Figure 9] FIG. 10 is a diagram of a retaining device including a colored coating. [Figure 10-14] 1 is a graph showing peel force in Newtons as a function of opening stroke in millimeters for patterns 1K to 1O, respectively. [Figure 15-16] FIG. 1 is a schematic diagram of the equipment used to measure peel force.

[0128] In all figures, common elements are identified by the same reference numbers. DETAILED DESCRIPTION OF THE INVENTION

[0129] FIG. 1A schematically illustrates a retaining device 10 including a continuous base 12 and a pattern 14 in the form of a solid disk. As shown in FIG. 2, 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. Each retaining element 16 includes a rod 18. The base 12, and in particular the upper surface 12A of the base 12, also includes a zone 20 free of retaining elements 16. For simplicity, the retaining elements 16 are represented by hatching in FIGS. 1A-1O and 6.

[0130] 1A, the retention device 10 includes a nonwoven (or woven) web 22. For example, the base 12 may be overmolded onto the nonwoven web 22. The base 12 may also be glued onto the nonwoven web 22.

[0131] In the following, elements common to various embodiments are identified by the same reference numerals.

[0132] Similarly, FIGS. 1B-1O show other embodiments of the retention device 10, particularly the pattern 14 formed by the retention elements 16. FIG.

[0133] 1A-1B, the pattern 14 can be a single pattern (FIGS. 1A-1E and 1G) or a repeating pattern 14 (FIGS. 1F and 1H-1O). The pattern 14 can consist of a closed contour 14A (FIGS. 1A-1F, 1H-1J, and 1M-1O).

[0134] 1G, it should be noted that there are zones 20 at two edges of the retaining device that are free of retaining elements 16. However, these zones 20 have scalloped edges that define the pattern 14.

[0135] As shown in FIG. 3 , the retaining element 16 can include a rod 18 with a head 24 mounted thereon. The rod 18 includes a lower end joined to the base 12 and an upper end opposite the lower end, with the head 24 extending over the upper end of the rod 18. The base 12 and the plurality of retaining elements 16 are integral. Therefore, it is understood that the base 12 and the plurality of retaining elements 16 are made of the same material, and that this material has no interface at the junction between the base and the plurality of retaining elements. This type of retaining element 16 is generally referred to as a hook or preform and can then be modified, for example, by calendering, to obtain the final hook. An example of a method for modifying a preform is described in document FR3050620 (incorporated by reference).

[0136] The retention device 10 may be manufactured, for example, by means of an apparatus 100 as shown in Figure 3, which allows for the production of a tape 26 for the retention device, which may then be cut into a plurality of retention devices 10. The tape 26 comprises a continuous base 12 and a plurality of retention elements 16. In the embodiment of Figure 3, the retention elements 16 are hooks, each of which comprises a rod 18 on which a head 24 is mounted.

[0137] The apparatus 100 as shown comprises a forming web 102 arranged on a rotary drive means 104, here comprising two rollers 104A, 104B, and a material dispensing means 106, e.g. an injector, adapted to carry out the injection of a forming material, e.g. a thermoplastic and / or elastic material.

[0138] The assembly thus formed by the forming web 102 and the rotary drive means 104 forms a forming apparatus.

[0139] The illustrated example including two rollers 104A, 104B is not intended to be limiting, and the number and arrangement of rollers can be varied to suit, among other things, the length of the forming web 102 and different stations of the apparatus. For example, it is possible to use three rollers, or just one, so that the forming web is placed around a single roller to form a sleeve. In particular, only one of the two rollers may be rotationally driven by a motor drive means, e.g., roller 104A, while the other roller 104B is free, i.e., without a motor drive means, and is itself rotationally driven via the forming web and driven by roller 104A.

[0140] Forming web 102 as shown includes an inner surface 102A and an outer surface 102B, with inner surface 102A in contact with rotational drive means 104.

[0141] Material dispensing means 106 is positioned to inject molding material onto outer surface 102B of forming web 102.

[0142] More specifically, material distribution means 106 is positioned spaced apart from and facing forming web 102 so as to define gap e as shown in Figure 3. Reference character A identifies the limit of material injected onto outer surface 102B of forming web 102, corresponding to the rear surface of material injected onto forming web 102 relative to the direction of travel of forming web 102.

[0143] The forming web 102 is provided with a plurality of cavities 102C that allow for the creation of the hooks of the hook retaining device.

[0144] Each cavity 102C is formed to define a rod 102C1 extending from the outer surface 102B of the forming web 102 toward the inner surface 102A, and a head 102C2 extending between the rod 102C1 and the inner surface 102A of the forming web 102.

[0145] In the illustrated example, the head 24 of the cavity 102C opens onto the inner surface 102A of the forming web 102. Thus, the cavity 102C is a through cavity. Such an embodiment is not limiting, and the cavity 102C may be blind and therefore not open outwardly from the inner surface 102A of the forming web 102, and / or the cavity 102C may contain only the rod 102C1.

[0146] The portions of the cavities 102C that form the rods 102C1 typically extend in a direction perpendicular to the outer surface 102B of the forming web 102. The portions of the cavities 102C that form the rods 102C1 typically have a geometry of revolution about an axis perpendicular to the outer surface 102B of the forming web 102, or a geometry with a plane of symmetry that extends parallel to and / or perpendicular to the direction of movement of the forming web 102.

[0147] The portion of cavity 102C forming head 102C2 typically extends radially or transversely to an axis perpendicular to outer surface 102B of forming web 102 and may have rotational symmetry about this axis perpendicular to outer surface 102B of forming web 102. The portion of cavity 102C forming head 102C2 typically has a substantially frustoconical or hexahedral shape.

[0148] The portion of cavity 102C forming head 102C2 may be straight or curved, for example, to form a curved portion toward inner surface 102A or outer surface 102B of molding web 102 extending from the portion of cavity 102C forming rod 102C1.

[0149] The portion of the cavity 102C that forms the head 102C2 can have a constant or variable thickness.

[0150] In the illustrated example, the portion of cavity 102C forming head 102C2 extends radially around the portion of cavity 102C forming rod 102C1 and has a generally disk shape.

[0151] The forming web 102 may have particular texturing on its inner surface 102A or on its outer surface 102B, such as a network of slots, grooves or channels that form vents or spikes, or may be substantially smooth.

[0152] The forming web 102 can be formed by the overlapping of several webs and therefore does not necessarily have to be a single piece or material.

[0153] The material distribution means 106 is typically arranged to carry out injection of material onto the forming web 102 at the point where the forming web 102 abuts the drive roller, in this case roller 104A in the example shown in Figure 3. The drive roller then forms the bottom of the cavity 102C.

[0154] In cases where the injection of molding material occurs while the forming web 102 is not abutting the drive roller, the material distribution means 106 may include a base positioned opposite the forming web 102 so that the inner surface 102A of the forming web 102 abuts against the base when the injection of material occurs, and the base forms the bottom for the cavity 102C of the forming web 102.

[0155] Compared to the use of conventional forming means such as rollers where the forming cavities are directly produced, the use of forming web 102 in conjunction with drive means 104 is advantageous for several reasons.

[0156] The use of the forming web 102 is particularly interesting in terms of modularity. Unlike solid rollers, whose removal and reattachment operations are particularly complicated to carry out, the forming web can in fact be easily removed and replaced by drive means. Such an advantage is particularly observed when the two rollers 104A, 104B are fixed to the frame on one and the same side, leaving the other end free for the introduction / removal of the forming web. To facilitate the introduction and / or removal of the forming web, means for guiding the forming web can also be used.

[0157] Furthermore, the manufacture of the forming web is significantly simplified compared to the manufacture of rollers containing forming cavities, which are in fact manufactured by stacking successive slices, therefore requiring multiple machining operations, creating significant constraints during assembly and each change of hook reference, and having a considerable mass that requires the maintenance of these rollers by their two ends, thus complicating their replacement.

[0158] The cavities 102C in the forming web 102 can be produced by an etching process or by using a laser where it is desired to form the retaining elements 16. It is also possible to envision producing a forming web 102 with cavities 102C distributed evenly throughout the forming web 102, and then closing the cavities 102C where it is desired to form zones 20 free of retaining elements 16.

[0159] 3, reference C indicates separation between the tape 26 and the forming web 102, which point corresponds, for example, to the level at which the base 12 of the tape 26 is no longer in contact with the forming web 102. It may be provided that the forming web 102 supports the demolding roller 108, i.e., the demolding roller 106 forms a lever within the forming web 102 to facilitate demolding of the preforms and / or hooks.

[0160] In the illustrated example, cavity 102C of forming web 102 is a through cavity. The apparatus may then include an element such as scraper 110 positioned to scrape inner surface 102A of forming web 102 to remove excess molding material, if necessary. "Injection" refers to the act of shaping molten molding material, e.g., distributing, feeding, molding, injecting, extruding.

[0161] The apparatus and associated methods presented above may also include means and steps for bonding the nonwoven (or woven) web 22 to the base 12 .

[0162] Such bonding of the web 22 on the base 12, including the retention element 16, is typically done by means of an adhesive or by melting the base or the web.

[0163] To achieve attachment of, for example, a web 22 of nonwoven material to the base 12 of the holding device 10, the proposed device 100 may comprise a web 22 transport means adapted to achieve web feeding and application of the web against the underside 12B of the base 12B downstream of the material distribution means 106.

[0164] 4 and 5 show a schematic example of an apparatus 100 including such means.

[0165] The illustrated apparatus is similar to that presented above with reference to FIG. 3, and therefore the common elements will not be described again here.

[0166] As can be seen in Figures 4 and 5, the illustrated apparatus includes a web drive means 112, here consisting of two rollers 112A, 112B, configured to deliver the web supply 22 downstream of the material distribution means 106.

[0167] Web 22 is typically a layer of nonwoven material, a thermoplastic film, an elastic film, or a composite film, or a set of thermally consolidated fibers and / or filaments. Web 22 may, for example, be a wrap of fibers and / or filaments.

[0168] In the examples shown in Figures 4 and 5, the web is represented as a layer of nonwoven material.

[0169] The substrate drive means 110 is configured to feed the web 22 into the apparatus and to apply the web 22 to the lower surface 12B of the base 12 downstream of the material distribution means 106.

[0170] The substrate driving means 110 is configured so that this application occurs before the base 12 solidifies. This application therefore causes at least partial penetration of the web 22 beyond the plane defined by the lower surface 12B of the base 12. Reference B in the figures indicates the point of contact between the base 12 and the web 22.

[0171] More specifically, the lower surface 12B of the base 12 is substantially planar and defines a plane. Application of a substrate to this surface, if the web 22 is a layer of nonwoven material within the base 12, causes penetration of portions of the fibers and / or filaments of the web 22, e.g., the layer of nonwoven material, thereby passing through the lower surface 12B of the base 12.

[0172] As long as such application occurs prior to solidification of base 12, it is not necessary to heat base 12 and / or web 22 to effect such bonding.

[0173] Considering a polypropylene base 12 as an example, application of a substrate to the underside 12B of the base 12 is typically performed when the underside 12B of the base 12 has a temperature between the melting temperature of the material and the Vicat softening temperature B of the material constituting it minus 30°C (Celsius), or between the melting temperature of the material constituting it and the Vicat softening temperature A of the material constituting it. More specifically, when the base comprises a polypropylene-based material, the underside 12B of the base 12 has a temperature of 75°C to 150°C, typically around 105°C, which temperature is typically measured by an infrared or laser camera. "Vicat softening temperature" means the temperature obtained at a heating rate of 50°C / h and a normalized load of 50N for Vicat B and 10N for Vicat A, according to one of the methods described in standard ISO 306 or ASTM D 1525.

[0174] The web 22 can be applied uniformly or non-uniformly to the lower surface 12B of the base 12.

[0175] The bond formed between the web 22 and the base 12 can be uniform or non-uniform.

[0176] If the web 22 is a set of thermally consolidated fibers and / or filaments, bonding to the base 12 may also occur by penetration of some of the fibers and / or filaments of the web 22 into the base 12 .

[0177] If the web 22 is a thermally solidified set of fibers and / or filaments, a thermoplastic film, an elastic film, or a composite film, the shrinkage of the base 12 during cooling may result from bonding with the substrate, which promotes a bonded surface between the substrate and the tape section, without affecting the visual appearance to the end user.

[0178] If the web 22 is a layer of nonwoven material, the hook release is performed at a basis weight of 80 g / m 2 (mass of material in grams per square meter of nonwoven fabric) is easily achieved. For example, a nonwoven basis weight of 5 g / m 2 ~120g / m 2 , or 25 g / m 2 ~100g / m 2 , or 10 g / m 2 ~70g / m 2 may be included in

[0179] In the case where the web 22 is a layer of nonwoven material, the apparatus may include a calendering device upstream of the substrate drive means 112, which allows a step of locally or non-locally calendering the layer of nonwoven material before application to the base 12.

[0180] This manner of fixing the web 12 to the base 12 including the retaining elements 16 is particularly advantageous in that it does not cause deformation of the base 12 and therefore advantageously makes it possible to maintain the shape of the base 12 obtained during the injection process and in particular to maintain the straight edges obtained via the method and apparatus described above.

[0181] This mode of securing the substrate to the tape can be applied to the tape forming methods described above, or more generally to any other tape forming method that includes a retaining element such as a hook.

[0182] FIG. 6 shows diagrammatically a portion of tape 26 obtained by means of device 100 of FIG.

[0183] The tape 26 is adapted to be cut into a plurality of retention devices 10. The locations of the cutouts are indicated by dotted lines in Figure 6, and the tape 26 and each retention device 10 includes a continuous base 12 made from a thermoplastic material and retention elements 16 that form a pattern 14. In this embodiment, the pattern 14 is pattern 14 of Figure 1C.

[0184] 7 shows a top view of the tape 26, which includes the base 12 and the retaining elements 16, here preforms or hooks. For simplicity, the retaining elements 16 are enlarged and shown evenly distributed on the base 12.

[0185] Figure 7 shows a schematic representation of the tape 26 obtained with the apparatus 100 of Figure 3. The tape 26 thus extends in a longitudinal direction, identified by axis XX in Figure 7, which is parallel to the direction MD. Figure 7 also shows a transverse direction, identified by axis YY, which is parallel to the direction CD.

[0186] In the case of this tape 26, an edge 26A extending in the MD direction is defined, and this edge 26A defines one of the two ends of the tape 26 in the CD direction.

[0187] The retaining elements 16, including rods 8 with or without heads 24 mounted thereon, are generally arranged near the edge 26A. The retaining elements 16 are typically arranged at a distance D from the edge 26A comprised between 2 and 3 pitches P between the retaining elements, the distance D being typically equal to 2 or 3 pitches P of the retaining elements, measured transversely to the longitudinal direction embodied by the axis XX in FIG. 7. The pitch P between two retaining elements 16 corresponds to the distance between the centers of two consecutive retaining elements in the longitudinal direction. In the example depicted in FIG. 7, the retaining elements 16 are arranged in rows extending in the longitudinal direction embodied by the axis XX, and these rows are identically repeated in the transverse direction.

[0188] Note that Figure 7 is not drawn to scale. Indeed, the distance D between the edge 26A and the first retaining element 16 is represented as being less than the radius R of the circle 28 corresponding to the average pitch. The center of each circle is positioned over the center of each retaining element, as viewed from above, and the circumference of the first circle passes through the center of the adjacent retaining element. The average pitch may correspond to the distance separating two adjacent retaining elements, i.e., the radius R of the circle 28. However, the distance D is typically equal to two or three average pitches. The diameter (equal to twice the radius R) at which the retaining elements are engraved (as viewed from above, perpendicular to the retaining elements) is 80 μm or more, preferably 250 μm or more and 500 μm or less, and preferably 450 μm or less.

[0189] 7, it should be noted that the retaining device 10 does not include a zone without retaining elements 16 within the meaning of the present disclosure. In fact, the distance D defines a linear web along the edge 26A of the base 12 that is free of retaining elements. However, this web does not make it possible to define a pattern within the meaning of the present disclosure, in that this web is not bounded on each side, in a direction perpendicular to the edge, by the retaining device.

[0190] The retaining elements 16 may also be arranged in a staggered or "honeycomb" configuration, for example, by longitudinally shifting rows of retaining elements, as shown in FIG.

[0191] In FIG. 8, only a few circles are shown on the left side of the figure.

[0192] It will be appreciated that forming web 102 has cavities 102C arranged to form pattern 14 of FIG.

[0193] It will be understood that this type of holding apparatus 10 may be obtained by an apparatus other than the forming web apparatus 102. However, it will be understood that the manufacture of a forming web 102 including cavities 102C in which the holding elements 16 are distributed to form the pattern 14 on the base 12 is easier than the manufacture of, for example, a roller. Furthermore, it is relatively easy to replace the forming web 102 of the apparatus 100 of Figures 3-5 if it is desired to manufacture a different pattern 14.

[0194] By way of non-limiting example, the material injected by the material dispensing means 106 to form the base 12 and the retaining element 16 may include a colorless thermoplastic material or a thermoplastic material with a dye. The thermoplastic material may be polypropylene, among others.

[0195] The dye may be, for example, a white dye, such as reference 50PP marketed by CABOT and doped with 50% by weight of TiO. Other dyes may include the violet dye of reference UN55206 from Color Services. These examples are given as non-limiting examples.

[0196] In all the examples described, the density of the retaining elements 16 in the pattern 14 is 1 cm of the base 12. 2 The retention elements 16 have a pitch between two retention elements (center-to-center distance from two adjacent retention elements) equal to 0.64 mm, which is equal to 280 retention elements 16 per base 12. This density of retention elements is given as a non-limiting example. The base 12 has a thickness E, measured perpendicular to the top surface 12A of the base 12, equal to 60 μm (see FIG. 2). The retention elements 16 have a height H, measured perpendicular to the base 12, which is five times the thickness of the base 12.

[0197] The height H of the retaining element is 35 μm or more, preferably 55 μm or more, even more preferably 80 μm or more, and can be 500 μm or less, preferably 350 μm or less, even more preferably 120 μm or less.

[0198] For example, the height H of the retaining element may be 80 to 350 μm, or 55 to 120 μm.

[0199] The diameter of the retaining element (viewed from above, perpendicular to the retaining element) is 80 μm or more, preferably 250 μm or more, and 500 μm or less, preferably 450 μm or less.

[0200] Example 1: A mixture of polypropylene and a white dye, Reference 50PP, commercially available from CABOT, with 50% by weight of TiO2, may be injected. The injected mixture may include 99.2% by weight of polypropylene and 0.8% by weight of white dye.

[0201] Example 2: A mixture of polypropylene, a purple dye (Reference UN55206 manufactured by COLOR SERVICE), and a white dye (Reference 50PP manufactured by CABOT) containing 50% by weight of TiO may be injected. The injected mixture contains 99.2% by weight of polypropylene, 0.4% by weight of white dye, and 0.4% by weight of purple dye.

[0202] Example 3: Example 3 shows the same composition as Example 1, with a colored coating deposited on the retaining element 16 by using inks and / or dyes, such as those commonly used in flexographic and / or pad printing, e.g., black ink, as shown in Figure 9.

[0203] Example 4: Example 4 shows the same composition as Example 2, with a colored coating deposited on the retaining element 16 by using inks and / or dyes, such as those commonly used in flexographic and / or pad printing, e.g., black ink, as shown in Figure 9.

[0204] CIE L * a * b * In space, for the zone 20 without retaining elements and the part of the pattern 14 formed by the retaining elements 16, the parameter L * , a * and b * are measured respectively. * , a * and b * The value of is measured, for example, with a spectrophotometer in natural light (under reference D65 / 10°) on an x-light Pantone model RM200QC on a white support, and is the color difference ΔE between the zone 20 containing no holding elements and at least a part of the pattern 14 formed by the plurality of holding elements 16. * is calculated according to equation (1).

[0205] In Example 1, color difference ΔE * is equal to 1.606, and in Example 2, the color difference ΔE * is equal to 5.493, and in Example 3, the color difference ΔE * is equal to 7.352, and in Example 4, the color difference ΔE * is equal to 7.911.

[0206] It is understood that a color difference is present on the retention device as soon as the base 12 includes a zone 20 without retention elements 16. Thus, the color difference between the zone 20 without retention elements and at least a portion of the pattern 14 formed by the plurality of retention elements 16 can improve the actual feel / quality and / or the feel / quality perceived by the user when using the retention device in a closed and / or open manner. It is understood that this benefit is obtained regardless of the shape of the pattern 14.

[0207] In the CIE XYZ color space, the difference in opacity between the zone 20 containing no retaining elements and at least a portion of the pattern 14 formed by the plurality of retaining elements 16 is measured, for example, with an X-Lite Pantone model RM200QC ambient light spectrocolorimeter (under reference D65 / 10°). black background and Y white backgroundThe values ​​are measured on a white substrate and on a black substrate for each of the zones 20 without retaining elements and at least a portion of the pattern 14 formed by the plurality of retaining elements 16, and the opacity expressed in % is calculated according to formula (2) for each of the zones 20 without retaining elements and at least a portion of the pattern 14 formed by the plurality of retaining elements 16.

[0208] The difference in opacity between the zone 20 without a retaining element and at least a portion of the pattern 14 formed by the plurality of retaining elements 16 is equal to the absolute value of the difference in opacity values ​​obtained for the zone 20 without a retaining element and for at least a portion of the pattern 14 formed by the plurality of retaining elements 16.

[0209] For example 1, the opacity difference is equal to 0.45, for example 2, the opacity difference is equal to 3.67, for example 3, the opacity difference is equal to 1.87, and for example 4, the opacity difference is equal to 12.00.

[0210] As can be observed, the opacity difference is proportional to the color difference ΔE perceived by the user. * In fact, in Example 1, the color difference ΔE * is greater than 1, the user can see the difference between the zone 20 without the retaining element and the pattern 14. However, the difference between the zone 20 without the retaining element and the pattern 14 is the color difference ΔE * is equal to 5.493, which is better than for Example 2, where the opacity difference is equal to 3.67.

[0211] 1A-1O are generally applied in the CD direction, i.e., peeling, i.e., separation of the retention device 10 from, for example, the loop application zone, is done parallel to the CD direction.

[0212] The pattern 14 of Figures 1A-1D can also be rotated by 90°.

[0213] The pattern 14 of FIG. 1E is preferably used as depicted in this figure. Indeed, the shape of the pattern 14 is substantially "V," and separation of the retention device 10 from the application zone converts the force applied in the CD direction, separating or separating the retention device 10 from the application zone, into a peel force component and a shear force component. It will be understood that the pattern 14 of FIG. 1E is arranged so that when the retention device 10 is biased to open, the force exerted on the retention device 10 is divided between at least a first peel force component and a second shear force component. The same applies to the pattern of FIG. 1F.

[0214] Note that the patterns 14 of Figures 1K-1O have alternating zones 20 without retaining elements 16 and patterns 14 in the CD direction, and continuous zones 20 without retaining elements 16 in the MD direction.

[0215] For patterns 1K-1O, Figures 10-14 respectively represent the peel curves obtained with the "180° peel" method by using application zone 30 marketed by APLIX under the reference name "SoftLoop Premium by APLIX", including carded thermally bonded loop nonwoven fabrics and SMS nonwoven fabrics assembled by thermal calendering.

[0216] The peel curves show the peel force in N (ordinate) as a function of the opening stroke in millimeters (abscissa). The curves shown in Figures 10-14 are the average of 20 measurements on different samples. The peel direction is parallel to the CD for all the tested retainers.

[0217] The retaining device 10 according to the pattern of Figures 1K-1O is fabricated according to the "180 degree peel" method described above.

[0218] 15 shows a strip 32 including a holding device 10 to be tested, which is assembled on an application zone 30. A sample from the application zone 30 is placed in the clamp 202 of the bellows 200, with the cut surface 30a in the clamp 202, and a 1 kg weight 204 is suspended from the lower part 32b of the strip 32 for 10 seconds. The weight 204 is then removed.

[0219] The assembly is then placed in a tensile tester 210 containing a 100 N measuring cell. The end 32 a of the strip 32, i.e., the end opposite the lower portion 32 b, is inserted into the upper jaw 212. The reading of the force measuring cell is set to zero. The cut end 30 a of the sample from the application zone 30, i.e., the end opposite the uncut side 30 b, is inserted into the lower jaw 214, and a slight tension is generated. The force should be between 0.02 N and 0.05 N. During installation, the jaws 212, 214 are spaced 50 mm apart from each other. The assembly is centered between the two jaws 212, 214. The test is performed at a constant travel speed of 305 mm / min (millimeters per minute), with a test stroke of 50 mm. This test stroke is adjusted as a function of the width of the holder being tested, allowing for complete separation between the holder and the application zone.

[0220] As can be seen from Figures 10-14, the peel curves have successive peaks P1-P4, each with a maximum value greater than that of the peak preceding it in the direction of the opening stroke. That is, between two successive peaks, the maximum value of the peak with the largest abscissa is greater than that of the peak with the smallest abscissa, and vice versa. Thus, in Figure 10, the maximum value of peak P1 is less than that of peak P2, which is less than that of peak P3, which is less than that of peak P4. Note also that the minimum values ​​of valleys V1-V3 are less than 50% of the maximum peel force, i.e., the maximum value of peak P4.

[0221] The same applies to the patterns in Figures 1L-1N.

[0222] The peaks and valleys have tips and bases, and the bases preferably have widths greater than 1 mm, more particularly greater than 2 mm, and in some cases may have widths greater than 3 mm.

[0223] Due to the peel force having at least two consecutive peaks separated by a valley, the value of the peel force peak increases with the release stroke, and the user feels this increasing force required to separate the retaining device from the application zone. Thus, the user perceives that the retaining device is well maintained on the application zone. Furthermore, the maximum peel force is such that the retaining device does not separate from the application zone in an undesirable manner.

[0224] In the pattern of Figure 1O, it can be seen that the minimum value of valley V2 is more than 50% of the maximum value of peak P3. It can also be observed that the different peaks P1-P3 are not marked as distinct as in the other curves (Figures 10-13). This is particularly linked to the width L measured in CD of the continuous zone 20 that does not contain the retaining element 16 in MD.

[0225] It is understood that the peel curve also depends on the nature of the application zone 30. However, application zones different from those marketed by APLIX under the reference "SoftLoop Premium by APLIX" will give peel curves with similar profiles, although the peel force values ​​may vary depending on the application zone.

[0226] The peel curve is a function of the color and / or color difference ΔE between the zone 20 without retention elements and at least a portion of the pattern 14 formed by the plurality of retention devices 16. * It is understood that this is unrelated.

[0227] However, these two properties may be combined to improve the feel / quality of the reality and / or the feel / quality perceived by the user when using the holding device in a closed and / or open manner.

[0228] While the present disclosure has been described with reference to certain exemplary embodiments, it will be apparent that various modifications and changes can be made to these examples without departing from the general scope of the invention as defined by the claims. In addition, individual features of the various embodiments mentioned may be combined in additional embodiments. Accordingly, the description and drawings should be considered in an illustrative rather than a restrictive sense.

[0229] The present disclosure may find application in areas such as hygiene, diaper, adult incontinence, packaging industries such as food packaging, ostomy, building, etc.

Claims

1. a continuous base (12) having an upper surface (12A) and a lower surface (12B); a plurality of holding elements (16) made integral with the base (12) extending from the upper surface (12A) of the base (12), each holding element (16) including a rod (18); The base (12) has at least one pattern (14) made up of the plurality of holding elements (16) and at least one zone (20) not including the holding elements in an area different from the pattern (14), and is formed with a CIE L ＊ a ＊ b ＊ In color space, a color difference ΔE between at least one of the zones (20) that does not contain the retaining elements and at least a portion of the pattern (14) formed by the plurality of retaining elements (16) ＊ is 1.0 or greater, A holding device (10) wherein said plurality of holding elements (16) are made from a thermoplastic material containing at most 2% by weight of a dye.

2. The retaining device (10) of claim 1, wherein the pattern (14) is a single pattern.

3. The retention device (10) of claim 1, wherein the pattern (14) is a repeating pattern.

4. 4. A retaining device (10) according to claim 2 or 3, wherein the pattern (14) has a closed contour (14A) whose outer edges are enveloped and have coincident ends.

5. The holding device (10) according to any one of claims 1 to 4, wherein a difference in opacity between at least one zone (20) that does not include the holding element and at least a portion of the pattern (14) formed by the plurality of holding elements (16) is 1 or greater in CIE XYZ color space.

6. The retaining device (10) of any one of claims 1 to 5, wherein the base (12) and the plurality of retaining elements (16) are made from a thermoplastic material containing a dye.

7. A retaining device (10) according to any one of claims 1 to 6, wherein one end of each retaining element (16) furthest from the base (12) comprises a coloured coating.

8. the pattern (14) repeats in the peel direction, the peel force measured by the "180° peel" method has at least two peaks (P1 to P4) and at least one valley (V1 to V3) between the two peaks (P1 to P4), the maximum value of the peaks increases with the opening stroke, and at least one of the valleys has a minimum value that is 85% or less of the maximum value of the peel force; A retaining device (10) according to any one of the preceding claims, comprising said zone (12) containing no continuous retaining elements (16) in a direction perpendicular to the peeling direction.

9. A retaining device (10) according to any one of claims 1 to 8, comprising a woven or nonwoven web (22) or a thermoplastic film or an elastic film or a composite film.

10. 10. The holding device (10) according to any one of claims 1 to 9, wherein the base (12) has a thickness (E) measured perpendicular to the top surface (12A) of the base (12) of 10 to 700 μm, and the height (H) of the holding element (16) measured perpendicular to the top surface (12A) of the base (12) is 3 to 10 times the thickness of the base (12).

11. A tape (26) for a retaining device according to any one of claims 1 to 10, intended to be cut into a plurality of retaining devices (10).

Images