Retention device and tape for retention device

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 a holding device including a protruding element such as a rod and / or a preform and / or a hook, for example, intended to cooperate with a hook and / or loop counterpart.

Background Art

[0002] Particularly in the field of hygiene, a holding device having a hook, for example, is used and cooperates with a loop counterpart that forms an application zone of the holding device.

[0003] When the user positions the holding device on this application zone, the user may doubt that the holding device is correctly positioned on the application zone. This application zone is generally called in the field of "comfort web" hygiene or is identified by the expression "landing zone". The fact that the user is convinced that the holding device is accurately positioned on the application zone affects the user's perception due to the fact that the holding device is properly held on the application zone.

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

[0005] The peel force is typically the force exerted on the holding device by the user to separate the holding device from the application zone. The fact that the user can easily separate the holding device from the application zone affects the user's perception due to the fact that the holding device is properly maintained on the application zone. In some extreme cases, a low peel force may cause an unexpected separation of the holding device and the application zone.

[0006] Therefore, it is necessary to improve the actual feel / quality and / or the feel / quality perceived by the user when the user uses the holding device in a closing and / or opening manner.

Summary of the Invention

Problems 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 easy to use, visual, cognitive, and intuitive for the user.

Means for Solving the Problems

[0008] For this purpose, according to a first aspect, the present disclosure relates to a holding device comprising the following. - A continuous base having an upper surface and a lower surface. - A plurality of holding elements extending from the upper surface of the base. Each holding element includes a rod, The base includes at least one zone that does not include the holding elements such that the plurality of holding elements form at least one pattern, and in the CIE L * a * b * color space, the color difference ΔE * between at least one zone that does not include the holding elements and at least a part of the pattern formed by the plurality of holding elements is 1.0 or more, preferably 1.5 or more, more preferably 3.0 or more, and even more preferably 4.5 or more.

[0009] It should be understood that the "pattern" means that the distribution of the holding elements is not uniform over the entire base. Thus, the holding elements may be evenly spaced on the base to form a pattern, but some zones of the base do not include the holding elements and can delimit the pattern.

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

[0011] The color difference ΔE between a zone without holding elements and at least a part of a pattern formed by a plurality of holding elements * is 1.0 or more, and a user can visually identify the pattern formed by the plurality of holding elements, and thus the user can ensure, for example, properly positioning the pattern on an application zone such as a loop counterpart. Thus, this makes it possible to improve the actual feel / quality and / or the feel / quality perceived by the user when the user uses the holding device in a closed and / or open manner.

[0012] CIE L, generally called CIELAB * a * b * color space or CIE L * a * b * color space is the most widely used space and is issued 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 standard. In this space, the transparency L * varies from 0 (= black) to 100 (= white), the parameter a * represents a value on an axis that varies from green to red, and the parameter b * represents a value on an axis that varies from blue to yellow. The color difference ΔE between a zone where there are no holding elements and at least a part of a pattern formed by a plurality of holding elements * is calculated according to Equation (1).

Equation

[0013] L * 、a * and b * values are measured, for example, with a spectrophotometer in natural light (reference D65 / 10°) of model RM200QC of x - rite pantone on a white support. This spectrophotometer is particularly suitable for measuring surfaces of 4 mm 2 or more.

[0014] In some embodiments, there are some zones with retaining elements, and each zone has a CIE L * a * b * In the color space, there is a color difference ΔE between at least one zone without a retaining element and at least a part of a pattern formed by a plurality of retaining elements * and the color difference ΔE * is 1.0 or more, preferably 1.5 or more, even more preferably 3.0 or more, and even more preferably 4.5 or more.

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

[0016] In some embodiments, the retaining element includes a rod on which a head is placed.

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

[0018] This type of retaining element may be, for example, a preform and / or a hook.

[0019] In some embodiments, the surface of the zone without a retaining element is 5% or more, preferably 10% or more, and even more preferably 15% or more of the entire surface of the base.

[0020] Generally, the holding elements do not exist at the edges of the base. Thus, in the case of a holding device without a pattern, i.e., a holding device in which the holding elements are uniformly distributed across the entire base, there may be webs along the edges of the base that do not contain holding elements. However, due to their straight shape, these webs do not have sufficient surface area to enable the user to identify the pattern. Thus, the user does not identify the presence of the zone without holding elements as the zone that defines the pattern. It is understood that the narrow zones that generally form the webs on the edges of the holding device are not bounded on each side by the holding device.

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

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

[0023] "MD direction", following the initials of "Machine Direction", refers to the direction of movement of the base within the machine during the manufacture of the holding device, and "CD direction", following the initials of "Cross Direction", refers to the direction perpendicular to the MD direction.

[0024] This pattern can have, for example, a pattern recognizable by the user, such as a distinctive logo or trademark.

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

[0026] The pattern may be, for example, 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] "Complex pattern" means a pattern that includes a plurality of entities that may be different from each other, and this complex pattern itself is repeated at least once.

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

[0030] "Closed contour" refers to a curve whose two ends coincide.

[0031] In some embodiments, when the holding device is biased in an open mode, the pattern is arranged such that the force exerted on the holding device is divided between at least a first component to a peeling force and a second component to a shearing force.

[0032] In some embodiments in the CIE XYZ color space, the opacity difference between at least one zone without holding elements and at least a part of the pattern formed by a plurality of holding 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, that is, the lightness of the surface. According to the standard ASTM D2805, the opacity expressed as a percentage is calculated according to Equation (2).

Equation

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

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

[0036] In some embodiments, there are some zones with holding elements, and each zone has a difference in opacity in the CIE XYZ color space between at least one zone without holding elements and at least a part of a pattern formed by a plurality of holding elements, and the difference in opacity is 1 or more, preferably 2 or more, and even more preferably 3 or more.

[0037] In some embodiments, there are some zones with holding elements, and each zone has a difference in opacity in the CIE XYZ color space between a first zone with holding elements and a second zone with holding elements, and the difference in opacity is 1 or more, preferably 2 or more, and even more preferably 3 or more.

[0038] In some embodiments, the base and the plurality of holding elements are made of 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 monomodal or multimodal (e.g., bimodal) molecular weight, particularly compositions and plastomers containing LLDPE, particularly 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 of a thermoplastic material containing a dye.

[0041] The dye may be, for example, a white dye, and examples include Reference 50PP commercially available from CABOT and filled with 50% by mass of TiO2. Another dye that can be mentioned is 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 zone 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 of a thermoplastic material containing up to 2% by mass of the dye, preferably up to 1.5% by mass, and even more preferably up to 1% by mass of the dye.

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

[0045] Thus, a colored coating such as an ink or a dye, such as those commonly used in flexographic printing and / or pad printing and / or rotary gravure printing and / or serigraphy and / or heliography, can be deposited to deposit a colored coating on the end of each retaining element furthest from the base. The ink may be a solvent-based or water-based ink, or may be UV crosslinkable.

[0046] Inks generally consist of three components: a pigment, especially a pigment or a dye, a medium forming the fluid phase of the ink, such as a mixture of polymers, diluents and / or solvents or water, and additives such as dispersants and defoamers, which makes it possible to optimize the properties of the ink.

[0047] As a polymer mixture, for example, mixtures containing up to 50% by mass of various acetates such as ethyl acetate, N-propyl acetate, isopropyl acetate, N-butyl acetate, and mixtures thereof, and / or up to 10% by mass of alcohol can be used.

[0048] As organic or mineral pigments, for example, diazo dyes, anthraquinone dyes, xanthene, azine, etc., titanium dioxide, carbon, black iron oxide, chromium oxide, etc. are used.

[0049] As non-limiting examples of inks, it is possible to use inks commercially available by ULTRA Ink with reference to "Type Series 30,000 ALC Polyamide", or inks commercially available by DOMECK EUROFLEX with reference to "Type Series EURO-Film PXA".

[0050] It is understood that this colored coating may be deposited on an uncolored or colored thermoplastic material in order to increase the contrast between the zone without the holding elements and the pattern formed by the plurality of holding elements.

[0051] Typically, the ink roller is coated with ink or dye, and the holding device is driven such that only the holding elements come into contact with the ink roller. Thus, the end farthest from the base of each holding element is covered with a colored coating to emphasize the visibility of the pattern.

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

[0053] The "180° peel" method is a method that enables the measurement of the peel force, i.e., the force that separates the holding device from the application zone. The following describes this method.

[0054] Conditioning of the sample - Condition the sample to be tested at 23 °C + / - 2 °C and 50% + / - 5% relative humidity for 2 hours.

[0055] Preparation of the holding device - The holding device is generally used in the CD direction. The holding device is generally in the form of a tape with a length in the MD direction. A part of the tape in the MD direction is adhered to a paper of 80 g / cm 2 and a 2 kg roller is applied or rotated in one direction and then back and forth (reciprocally) over the entire length of the tape on the holding device. Cut the paper and the holding device into strips 25.4 mm wide in the CD direction using scissors at a speed of approximately 700 mm / min. Each paper strip has a length of 210 mm and the holding device is placed at the center of this strip.

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

[0057] Assembly - Place the strip on the sample from the application zone such that the holding device is placed at the center of the sample from the application zone. Apply or rotate a 2 kg roller in one direction and then back and forth (reciprocally) over the entire length of the strip on the strip at a speed of approximately 700 mm / min. The sample from the application zone is placed in a clamp of a gallows where the cut is in the clamp, and a 1 kg weight is suspended under the strip for 10 seconds. Then remove the weight. This step makes it possible to ensure the correct assembly of the holding device and the sample from the application zone.

[0058] Measurement - Next, the assembly is placed in a tensile testing machine that includes a 100 N (Newton) measurement cell. The strip is inserted into the upper (movable) jaw. The reading of the force measurement cell is set to zero. Insert the sample from the application zone into the lower (fixed) jaw and create a slight tension. The force must be between 0.02 N and 0.05 N. At the time of attachment, the distance between the jaws is 50 mm apart. The assembly is placed at the center between the two jaws. The test is performed with a constant movement at a speed of 305 mm / min, and the test stroke is 50 mm. This test stroke is adapted according to the width of the holding device being tested.

[0059] It is understood that the valley is located between two consecutive peaks. Since the peel curve is not smooth, in order to distinguish one peak from another, when the difference between the maximum values of the two peaks exceeds at least 10% of the maximum value of the measured maximum force, that is, exceeds 10% of the maximum value of the maximum peak, a new peak is considered to exist. Peaks and valleys have points and bottoms, and the bottoms may preferably have a width exceeding 1 mm, more specifically a width exceeding 2 mm, and in some cases a width exceeding 3 mm.

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

[0061] The peel force obtained according to the "180° peel" method of 1.8 N or more makes it possible to avoid unexpected peeling of the holding device and the application zone, which is generally considered to be the case regardless of the holding device and the application zone.

[0062] In some embodiments, the pattern repeats in the peeling direction, and the peeling force measured according to the "180° peeling" method has at least three peaks and at least two valleys, each valley being included 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, more preferably 60% or less, even more preferably 50% or less, even more preferably 40% or less of the maximum value of the peeling force.

[0063] In some embodiments, the device includes a zone that does not include a continuous holding element in a direction perpendicular to the peeling direction.

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

[0065] These continuous zones without holding elements have a small width, but they are bounded on each side by holding elements, enabling them to define the pattern formed by the holding elements.

[0066] In some embodiments, the zone without a continuous holding element in the direction perpendicular to the peeling direction has a width measured in the peeling direction of 1% or more, preferably 2% or more, preferably 4% or more, more preferably 5% or more, even more preferably 10% or more of the width of the base measured in the peeling direction.

[0067] In some embodiments, the holding device includes a woven or non-woven web, or a thermoplastic film, or an elastic film, or a composite film.

[0068] This woven or non-woven web, or thermoplastic film, or elastic film, or composite film serves as a support for the base.

[0069] "Nonwoven fabric" means a 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 and results in the presence of bonds between the fibers and / or filaments. This consolidation may be direct, i.e., made directly between the fibers and / or filaments by welding, or indirect, i.e., made by means of an intermediate layer between the fibers and / or filaments, such as a layer of adhesive or binder. The term "nonwoven fabric" refers to a structure in the form of a tape or wrap of fibers and / or filaments intertwined in a non-uniform, irregular or random pattern. Nonwoven fabrics can have a single-layer or multi-layer structure. Nonwoven fabrics can also be combined with other materials to form laminates. Nonwoven fabrics may be made from different synthetic and / or natural materials. Examples of natural materials are cellulose fibers such as cotton, jute, linen, etc., and may also include reprocessed cellulose fibers such as rayon or viscose. Natural fibers for nonwoven materials can be prepared using various methods such as carding. Examples of synthetic materials include, but are not limited to, polyolefins such as polyethylene, polypropylene, polybutylene, etc.; polyamides such as polyamide 6, polyamide 6.6, polyamide 10, polyamide 12, etc.; polyesters such as polyethylene terephthalate, polybutylene terephthalate, polylactic acid, etc., polycarbonates, polystyrene, thermoplastic elastomers, vinyl polymers, polyurethanes and their mixtures and copolymers, including synthetic plastic polymers known to form fibers. Examples of nonwoven fabrics may be nonwoven fabrics of types such as spunbond, spunmelt, card thermo-bonded, SMS, SMMS, SS, SSSS, SSMMS, SSMMMS, air-through, etc. For example, the nonwoven fabric may be a nonwoven fabric comprising different combinations of layers of spunbond "S" and meltblown "M". These examples are given as non-limiting examples.

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

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

[0072] "Thermoplastic film made of an elastic material" means a film that can be stretched without breaking under the influence of a stretching force exerted in the transverse direction and can substantially recover its shape and its initial dimensions after the stretching force is relaxed. It is, for example, at room temperature (23 °C), for an elongation of 100% of its initial dimensions, a film that retains a residual deformation or residual magnetization (residual deformation also called permanent strain or SET) of less than 20%, more preferably less than 5% of its initial dimensions (before elongation) after elongation and relaxation.

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

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

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

[0076] In some embodiments, the base may have a constant or non-constant thickness between two opposite edges of the base, for example between two opposite edges extending in the CD or MD direction. The base may be continuous or discontinuous between two opposite edges of the base, for example between two opposite edges extending in the CD or MD direction.

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

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

[0079] In some embodiments, the height of the holding element 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 holding element may be 80 to 350 μm, or 55 to 120 μm.

[0081] In some embodiments, the diameter (perpendicular to the holding element in the top view) at which the holding element is engraved 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 holding elements is from 0.1 mm to 10 mm.

[0083] In some embodiments, the pattern has 2 more than 20 holding elements per 1 cm, preferably 2 more than 50 holding elements per 1 cm, more preferably 2 more than 100 holding elements per 1 cm, and 2 250 or fewer holding elements per 1 cm, preferably 2 200 or fewer holding elements per 1 cm, more preferably 2 150 or fewer holding elements per 1 cm.

[0084] According to a second aspect, the present disclosure also relates to a holding device comprising the following. - A continuous base having an upper surface and a lower surface, and - A plurality of holding elements extending from the upper surface of the base, each holding element including a rod. The base includes at least one zone without holding elements such that a plurality of holding elements form at least one pattern, the pattern is repeated in the peeling direction, and the peeling force measured according to the "180° peeling" method has at least two peaks and at least one valley included between the two peaks, the maximum value of the peaks increases with the opening stroke, and the at least one valley has a minimum value that is 85% or less, preferably 70% or less, more preferably 60% or less, even more preferably 50% or less, even more preferably 40% or less of the maximum value of the peeling force.

[0085] It should be understood that the "pattern" means that the distribution of the holding elements is not uniform across the entire base. Thus, the holding elements may be evenly spaced on the base to form a pattern, but some zones of the base do not contain holding elements and can delimit the pattern.

[0086] The pattern includes a pattern surface corresponding to the surface covered by a circle with a radius corresponding to the average pitch, and the center of each circle is respectively located above the center of the holding element when viewed from above. The average pitch may correspond to the distance separating two adjacent holding elements. At least one zone without holding elements is a surface not covered by the pattern surface.

[0087] Thanks to the peeling force where at least two consecutive peaks are separated by a valley, the peak value of the peeling force increases with the opening stroke, and the user feels this increasing force required to separate the holding device from the application zone. Thus, the user perceives that the holding device is properly maintained on the application zone. Further, the maximum value of the peeling force is such that the holding device is not removed from the application zone in an undesirable manner. Thus, this enables the improvement of the actual feel / quality and / or the feel / quality perceived by the user when the user uses the holding device in a closing and / or opening manner.

[0088] Peaks and valleys have tips and bottoms, and the bottoms may have a width exceeding preferably 1 mm, more specifically exceeding 2 mm, and in some cases exceeding 3 mm.

[0089] The peel force obtained according to the "180° peel" method, which is 1.8 N or more, enables avoiding unexpected peeling of the holding device and the application zone, which is generally considered to be possible regardless of the holding device and the 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 included 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, even more preferably 40% or less of the maximum value of the peel force.

[0091] In some embodiments, the device includes a zone that does not include continuous holding elements in a direction perpendicular to the peel direction.

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

[0093] In some embodiments, the zone that does not include continuous holding elements in a direction perpendicular to the peel direction has a width measured in the peel direction of 1% or more, preferably 2% or more, preferably 4% or more, even more preferably 5% or more, 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 *The color difference ΔE between at least one zone without holding elements and at least a part of a pattern formed by a plurality of holding elements in a color space * is 1.0 or more, preferably 1.5 or more, even more preferably 3.0 or more, and even more preferably 4.5 or more.

[0095] In some embodiments, there are some zones with holding elements, and each zone has CIE L * a * b * The color difference ΔE between at least one zone without holding elements and at least a part of a pattern formed by a plurality of holding elements in a color space * is provided with holding elements having, and the color difference ΔE * is 1.0 or more, preferably 1.5 or more, even more preferably 3.0 or more, and even more preferably 4.5 or more.

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

[0097] In some embodiments, the holding device includes a rod on which the head is placed.

[0098] In some embodiments, the surface of the zone without holding elements is 5% or more, preferably 10% or more, and even more preferably 15% or more of the entire surface of the base.

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

[0100] The "single pattern" means an isolated pattern within a base zone that measures 25.4 mm or 30.0 mm or 35.0 mm in the MD direction and 13.0 mm or 25.0 mm or 25.4 mm in the CD direction.

[0101] This pattern can represent, for example, a pattern recognizable by a user, such as a unique logo 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 holding device is biased in an open mode, the force exerted on the holding device is divided at least between a first component to the peeling force and a second component to the shearing force.

[0106] In some embodiments, in the CIE XYZ color space, the opacity difference between a zone without holding elements and at least a part of the pattern formed by a plurality of holding elements is 1 or more, preferably 2 or more, and even more preferably 3 or more.

[0107] In some embodiments, there are some zones with holding elements, and each zone comprises a holding element having an opacity difference between at least one zone without holding elements and at least a part of the pattern formed by a plurality of holding elements in the CIE XYZ color space, and the opacity difference is 1 or more, preferably 2 or more, and even more preferably 3 or more.

[0108] In some embodiments, there are several zones with holding elements, and each zone has a holding element with a difference in opacity between a first zone with a holding element and a second zone with a holding element in the CIE XYZ color space. The difference in opacity is 1 or more, preferably 2 or more, and even more preferably 3 or more.

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

[0110] In some embodiments, the base and the plurality of holding devices are integrally made.

[0111] In other words, the base and the plurality of holding elements are made of the same material, and in this material, there is no interface at the joint between the base and the plurality of holding elements.

[0112] In some embodiments, the base and the plurality of holding elements are made of a thermoplastic material containing a dye.

[0113] In some embodiments, the base and the plurality of holding elements are made of a thermoplastic material containing a maximum of 2% by mass of the dye, preferably a maximum of 1.5% by mass, and even more preferably a maximum of 1% by mass of the dye.

[0114] In some embodiments, one end of each holding device farthest from the base includes a colored coating.

[0115] In some embodiments, the holding device includes a woven or non-woven 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 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, as measured perpendicular to the upper surface of the base.

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

[0119] In some embodiments, the height of the holding element measured perpendicular to the upper surface of the base is 3 to 10 times the thickness of the base.

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

[0121] In some embodiments, the height of the holding element 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 holding element may be 80 to 350 μm, or 55 to 120 μm.

[0123] In some embodiments, the diameter (perpendicular to the holding element in the top view) at which the holding element is engraved 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 holding elements is included between 0.1 mm and 10 mm.

[0125] In some embodiments, the pattern is 20 / cm 2 or more, preferably 50 / cm 2 or more, even more preferably 100 / cm 2 or more, and 250 / cm 2Less preferably, 200 / cm 2 Even more preferably, less than 150 / cm 2 It has the following density of the holding element.

[0126] The present disclosure also relates to a tape for a holding device as defined above, which is intended to be cut into a plurality of holding devices.

Brief Description of the Drawings

[0127] Other features and advantages of the objectives of the present disclosure will become apparent from the following description of the embodiments given as non-limiting examples with reference to the accompanying drawings.

FIG. 1A - 1O

FIG. 2

FIG. 3

FIGS. 4 - 5

FIG. 6

FIG. 7

FIG. 8

FIG. 9

FIGS. 10 - 14

FIGS. 15 - 16

[0128] In all the figures, common elements are identified by the same reference numerals.

Embodiments for Carrying Out the Invention

[0129] Figure 1A schematically shows a holding device 10 including a continuous base 12 and a pattern 14 in the form of a solid disk. As shown in Figure 2, the base 12 includes an upper surface 12A and a lower surface 12B, and the pattern 14 is formed by a plurality of holding elements 16 extending from the upper surface 12A of the base 12. Each holding element 16 includes a rod 18. The base 12, particularly the upper surface 12A of the base 12, also includes a zone 20 without holding elements 16. For the sake of simplicity, the holding elements 16 are represented by hatching in Figures 1A - 1O and Figure 6.

[0130] In the embodiment of Figure 1A, the holding device 10 includes a non - woven (or woven) web 22. For example, the base 12 may be overmolded on the non - woven web 22. The base 12 may also be adhered to the non - woven web 22.

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

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

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

[0134] Note that in Figure 1G, zones 20 without holding elements 16 are present at two edges of the holding device. However, these zones 20 have a wavy edge that defines the pattern 14.

[0135] As shown in FIG. 3, the holding element 16 can include a rod 18 on which the head 24 is placed. The rod 18 includes a lower end joined to the base 12 and an upper end opposite the lower end, and the head 24 straddles the upper end of the rod 18. The base 12 and the plurality of holding elements 16 are integral. Thus, it is understood that the base 12 and the plurality of holding elements 16 are made of the same material and there is no interface at the joint between the base and the plurality of holding elements in this material. This type of holding element 16 is generally denoted by the terms hook or preform and can then be modified, for example by calendering, to obtain the final hook. An example of a method for modifying the preform is described in document FR3050620 (incorporated by reference).

[0136] The holding device 10 may be manufactured, for example, by means of a device 100 as shown in FIG. 3, the device 100 enabling the production of a tape 26 for the holding device, and the tape 26 may then be cut into a plurality of holding devices 10. The tape 26 includes a continuous base 12 and a plurality of holding elements 16. In the embodiment of FIG. 3, the holding element 16 is a hook, and each hook includes a rod 18 on which the head 24 is placed.

[0137] A device 100 as illustrated is here disposed on a rotary drive means 104 including two rollers 104A, 104B and includes a forming web 102 and a material dispensing means 106, such as an injector, adapted to perform the injection of a forming material, for example a thermoplastic and / or elastic material.

[0138] In this way, an assembly formed by the forming web 102 and the rotary drive means 104 forms a forming device.

[0139] The illustrated example including the two rollers 104A, 104B is not limiting, and the number and arrangement of the rollers can be changed, in particular, to suit the length of the forming web 102 and the different stations of the apparatus. For example, it is possible to use three rollers or only one roller such that the forming web is arranged around a single roller to form a sleeve. In particular, only one of the two rollers may be rotationally driven by motor driving means, for example the roller 104A, and the other roller 104B is free, i.e., without motor driving means, and is rotationally driven by itself via the forming web and is driven by the roller 104A.

[0140] The forming web 102 as presented includes an inner surface 102A and an outer surface 102B, and the inner surface 102A is in contact with the rotational driving means 104.

[0141] The material distribution means 106 is arranged to inject the forming material onto the outer surface 102B of the forming web 102.

[0142] More specifically, the material distribution means 106 is arranged spaced apart from and opposite to the forming web 102 such that the material distribution means 106 defines the gap e shown in FIG. 3. The reference sign A identifies the limit of the material injected onto the outer surface 102B of the forming web 102 corresponding to the rear surface of the material injected onto the forming web 102 with respect to the moving direction of the forming web 102.

[0143] The forming web 102 is provided with a plurality of cavities 102C that enable the generation of hooks of the hook holding device.

[0144] Each cavity 102C is formed to define a rod 102C1 extending from the outer surface 102B of the forming web 102 towards 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 thus may not open out from the inner surface 102A of the forming web 102, and / or the cavity 102C may include only the rod 102C1.

[0146] The portion forming the rod 102C1 of the cavity 102C typically extends in a direction perpendicular to the outer surface 102B of the forming web 102. The portion forming the rod 102C1 of the cavity 102C typically has a geometric shape of rotation about an axis perpendicular to the outer surface 102B of the forming web 102, or a geometric shape having a plane of symmetry extending in a direction parallel to the direction of movement of the forming web 102 and / or in a direction perpendicular to the direction of movement of the forming web 102.

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

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

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

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

[0151] The formed web 102 may have a specific texturing, such as slots, groove networks or passage networks, which form ventilation holes or spikes, on its inner surface 102A or its outer surface 102B, or may be substantially smooth.

[0152] The formed web 102 can be formed by the superposition of several webs and thus does not necessarily have to be a single part or a single material.

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

[0154] In the case where the injection of the forming material is carried out while the formed web 102 is not in contact with the drive roller, the material distribution means 106 can include a base arranged on the opposite side of the formed web 102 such that the inner surface 102A of the formed web 102 abuts against the base when the injection of the material is carried out and the base forms the bottom for the cavity 102C of the formed web 102.

[0155] The use of the formed web 102 associated with the drive means 104 is advantageous for several reasons compared to the use of conventional forming means such as rollers in which the forming cavity is manufactured directly.

[0156] The use of the formed web 102 is particularly interesting in terms of modularity. Unlike a solid roller where the removal and reattachment operations are particularly complex to perform, the formed web can actually be easily removed and replaced by the drive means. Such an advantage is particularly observed when the two rollers 104A, 104B are fixed to the frame on the same side and the ends on the other side are left free for the introduction / removal of the formed web. Means for guiding the formed web can also be used to facilitate the introduction and / or removal of the formed web.

[0157] Furthermore, the production of the formed web is significantly simplified compared to the production of rollers that include forming cavities. Such rollers are actually produced by stacking successive slices and thus require multiple machining operations, impose significant constraints during assembly and each change of hook reference, have a considerable mass that requires maintenance of these rollers by their two ends, and thus complicate their replacement.

[0158] The cavities 102C within the formed web 102 can be produced by an etching process or by using a laser at locations where it is desired to form the retaining elements 16. It is also possible to manufacture a formed web 102 having cavities 102C uniformly distributed throughout the formed web 102 and then assume that the cavities 102C are blocked at locations where it is desired to form zones 20 without the retaining elements 16.

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

[0160] In the illustrated example, the cavities 102C of the formed web 102 are through-cavities. Next, the apparatus can include elements such as a scraper 110 arranged to rub the inner surface 102A of the formed web 102 and remove excess forming material if necessary. "Injection" means the action of shaping the molten forming material, for example, distributing, feeding, shaping, injecting, extruding.

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

[0162] Such a joining of the web 22 on the base 12 including the retaining element 16 is typically effected by means of an adhesive or by melting the base or the web.

[0163] To achieve the attachment of a web 22, for example of a non-woven material, to the base 12 of the retaining device 10, the proposed device 100 may constitute web running means, adapted to effect a web supply and applying the web to the lower face 12B of the base 12B downstream of the material distribution means 106.

[0164] Figures 4 and 5 schematically show an example of a device 100 including such means.

[0165] The device shown is similar to that presented previously with reference to Figure 3 and accordingly common elements are not described again here.

[0166] As can be seen in Figures 4 and 5, the device shown includes web driving means 112 configured to achieve a web supply 22 downstream of the material distribution means 106, here constituted by two rollers 112A, 112B.

[0167] The web 22 is typically a layer of non-woven material, a thermoplastic film, an elastic film or a composite film, or a set of thermally solidified fibres and / or filaments. The web 22 is, for example, a wrap of fibres and / or filaments.

[0168] In the example shown in Figures 4 and 5, the web is represented as a layer of non-woven material.

[0169] The substrate driving means 110 is configured to supply the web 22 to the device and apply this web 22 to the lower face 12B of the base 12 downstream of the material distribution means 106.

[0170] The base driving means 110 is configured such that this application is performed before the base 12 solidifies. Thus, this application causes at least partial penetration of the web 22 beyond the plane defined by the lower surface 12B of the base 12. The reference sign B in the figure indicates the contact point 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. The application of the base material to this surface causes penetration of the web 22, for example, the fibers and / or filaments of the non-woven material layer, when the web 22 is a non-woven material layer within the base 12, thereby passing through the lower surface 12B of the base 12.

[0172] As long as such application is performed before the solidification of the base 12, there is no need to heat the base 12 and / or the web 22 to effect such bonding.

[0173] As an example, considering a base 12 made of polypropylene, the application of the base material to the lower surface 12B of the base 12 is typically carried out when the lower surface 12B of the base 12 has a temperature between the melting temperature of the material and the temperature obtained by subtracting 30 °C (Celsius) from the Vicat softening temperature B of the material constituting it, 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 contains a polypropylene-based material, the lower surface 12B of the base 12 has a temperature of 75 °C to 150 °C, typically about 105 °C, and this temperature is typically measured by an infrared camera or a laser camera. The "Vicat softening temperature" means the temperature obtained according to one of the methods described in Standard ISO 306 or ASTM D 1525, with a heating rate of 50 °C / h, a normalized load of 50 N for Vicat B, and a normalized load of 10 N for Vicat A.

[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 formed uniformly or non-uniformly.

[0176] When the web 22 is a set of thermally solidified fibers and / or filaments, the bond with the base 12 is also effected by the penetration of some of the fibers and / or filaments of the web 22 into the base 12.

[0177] When the web 22 is a set of thermally solidified fibers and / or filaments, a thermoplastic film, an elastic film, or a composite film, the shrinkage phenomenon of the base 12 during its cooling can result from the bond with the substrate, and this shrinkage promotes the bond surface between the substrate and the tape part. This shrinkage does not affect the visual appearance of the end user.

[0178] When the web 22 is a layer of non-woven material, the release of the hook is easily carried out even with a non-woven fabric having a basis weight of less than 80 g / m 2 (mass of the material in grams per square meter of non-woven fabric). For example, the non-woven basis weight may be included in 5 g / m 2 ~120 g / m 2 or 25 g / m 2 ~100 g / m 2 or 10 g / m 2 ~70 g / m 2 It may be included in.

[0179] In the case where the web 22 is a layer of non-woven material, the apparatus may include a calender device upstream of the substrate driving means 112, whereby a step of locally or non-locally calendering the layer of non-woven material can be performed before applying it to the base 12.

[0180] This manner of fixing the web 12 to the base 12 including the holding element 16 is particularly advantageous in that it does not cause deformation of the base 12, and thus advantageously maintains the shape of the base 12 obtained during the injection process, and in particular, maintains the straight edge obtained via the above-described method and apparatus.

[0181] This mode of fixing the substrate to the tape can be applied to the above-described tape forming method, or more generally, to any other tape forming method that includes holding elements such as hooks.

[0182] FIG. 6 schematically shows a part of the tape 26 obtained by the means of the apparatus 100 of FIG. 4.

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

[0184] FIG. 7 represents the tape 26 in a top view, and the tape 26 includes a base 12 and holding elements 16 that are here preforms or hooks. For simplicity, the holding elements 16 are enlarged and shown uniformly distributed on the base 12.

[0185] FIG. 7 schematically shows the tape 26 obtained with the apparatus 100 of FIG. 3. Thus, the tape 26 extends in the longitudinal direction identified by the axis XX of FIG. 7, which is parallel to the direction MD. FIG. 7 also represents the transverse direction identified by the axis YY parallel to the CD direction.

[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 holding element 16, which includes the rod 8 with the head 24 placed thereon or not placed thereon, is generally arranged in the vicinity of the edge 26A. The holding element 16 is typically arranged at a distance D from the edge 26A that is included between 2 to 3 pitches P between the holding elements, and is typically equal to 2 or 3 pitches P of the holding element. The distance D is measured transversely with respect to the longitudinal direction embodied by the axis XX in FIG. 7. The pitch P between two holding elements 16 corresponds to the distance between the centers of two consecutive holding elements in the longitudinal direction. In the example shown in FIG. 7, the holding elements 16 are arranged in columns extending in the longitudinal direction embodied by the axis XX, and these columns are identically repeated transversely.

[0188] Note that FIG. 7 is not to scale. In fact, the distance D between the edge 26A and the first holding 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 holding element when viewed from above, and the circumference of the first circle passes through the centers of adjacent holding elements. The average pitch may correspond to the distance separating two adjacent holding elements, i.e., the radius R of the circle 28. However, the distance D is typically equal to 2 or 3 average pitches. The diameter (equal to twice the radius R) along which the holding elements are engraved (perpendicular to the holding elements when viewed from above) is 80 μm or more, preferably 250 μm or more and 500 μm or less, preferably 450 μm or less.

[0189] Note that on the left side of FIG. 7, the holding device 10 does not include a zone without holding elements 16 within the scope of the present disclosure. In fact, the distance D defines a linear web along the edge 26A of the base 12 without holding elements. However, this web does not allow defining a pattern within the scope of the present disclosure in that this web is not bounded on each side in the direction perpendicular to the edge by the holding device.

[0190] The holding elements 16 can also be arranged in a staggered or "honeycomb" pattern, for example, as shown in FIG. 8, by moving the columns of holding elements in the longitudinal direction.

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

[0192] It is understood that the forming web 102 has cavities 102C arranged to form pattern 14 of FIG. 8.

[0193] It is understood that this type of holding device 10 may be obtained by a device other than the forming web device 102. However, it is understood that the manufacture of the forming web 102 in which the holding elements 16 are distributed to form the pattern 14 in the cavities 102C included in the base 12 is easier than, for example, the manufacture of a roller. Further, when it is desired to manufacture different patterns 14, it is relatively easy to replace the forming web 102 of the device 100 in FIGS. 3 to 5.

[0194] As a non-limiting illustration, the material injected by the material distribution means 106 to form the base 12 and the holding elements 16 may include a colorless thermoplastic material or a thermoplastic material having a dye. The thermoplastic material may in particular be polypropylene.

[0195] The dye may be, for example, a white dye. For example, reference 50PP commercially available from CABOT and containing 50% by mass of TiO2 can be cited. Other dyes may include the purple dye of reference UN55206 manufactured by Color Services. These examples are given as non-limiting examples.

[0196] In all the examples described, the density of the holding elements 16 in the pattern 14 is equal to 280 holding elements per 1 cm of the base 12 2 and the holding elements 16 have a pitch (center-to-center distance from two adjacent holding elements) equal to 0.64 mm between two holding elements. This density of the holding elements is given as a non-limiting example. The base 12 has a thickness E measured perpendicular to the upper surface 12A of the base 12 and equal to 60 μm (see FIG. 2). The holding 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 holding element is 35 μm or more, preferably 55 μm or more, more preferably 80 μm or more, and can be 500 μm or less, preferably 350 μm or less, more preferably 120 μm or less.

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

[0199] The diameter of the holding element (viewed from above and perpendicular to the holding 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 mixed solution of polypropylene and a white dye of reference 50PP with 50% by mass of TiO₂ commercially available from CABOT may be injected. The injected mixture may contain 99.2% by mass of polypropylene and 0.8% by mass of the white dye.

[0201] (Example 2) A mixed solution of polypropylene, a purple dye of reference UN55206 manufactured by COLOR SERVICE, and a white dye of reference 50PP manufactured by CABOT with 50% by mass of TiO₂ may be injected. The injected mixed solution can contain 99.2% by mass of polypropylene, 0.4% by mass of the white dye, and 0.4% by mass of the purple dye.

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

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

[0204] CIE L * a * b * For a zone 20 without a holding element and a part of the pattern 14 formed by the holding elements 16 in space, the parameter L * , a * and b * are measured respectively. L * , a * and b * The values of are measured, for example, with a spectrophotometer in natural light (under reference D65 / 10°) of the model RM200QC of x-Rite Pantone on a white support, and the color difference ΔE * is calculated according to Equation (1).

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

[0206] It is understood that the color difference is present on the holding device as soon as the base 12 includes the zone 20 without the holding elements 16. Thus, the color difference between the zone 20 without holding elements and at least a part of the pattern 14 formed by the plurality of holding elements 16 makes it possible to improve the actual feel / quality and / or the feel / quality perceived by the user when the user uses the holding device in a closed and / or open mode. This advantage is understood to be obtained regardless of the shape of the pattern 14.

[0207] In the CIE XYZ color space, the opacity difference between the zone 20 without holding elements and at least a part of the pattern 14 formed by the plurality of holding elements 16 is measured, for example, with a natural light spectrophotometer (under reference D65 / 10°) of the model RM200QC of x-Rite Pantone. Y black background and Y white backgroundThe value is measured on the white support and on the black support for each of the zone 20 without holding elements and at least a part of the pattern 14 formed by the plurality of holding elements 16, and the opacity expressed in % is calculated according to formula (2) for each of the zone 20 without holding elements and at least a part of the pattern 14 formed by the plurality of holding elements 16.

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

[0209] In the case of Example 1, the opacity difference is equal to 0.45, in the case of Example 2, the opacity difference is equal to 3.67, in the case of Example 3, the opacity difference is equal to 1.87, and in the case of Example 4, the opacity difference is equal to 12.00.

[0210] As can be observed, the opacity difference makes it possible to improve the perception of the color difference ΔE * perceived by the user. In fact, in Example 1, since the color difference ΔE * is greater than 1, the user can see the difference between the zone 20 without holding elements and the pattern 14. However, the difference between the zone 20 without holding elements and the pattern 14 is better for Example 2 where the color difference ΔE * is equal to 5.493 and the opacity difference is equal to 3.67.

[0211] The patterns 14 in FIGS. 1A to 1O are generally used in the CD direction. That is, the peeling, i.e., the separation of the holding device 10 from, for example, the loop application zone, is made parallel to the CD direction.

[0212] The patterns 14 in FIGS. 1A to 1D can also be rotated by 90°.

[0213] The pattern 14 in FIG. 1E is preferably used as represented in this figure. In fact, the shape of the pattern 14 is substantially a "V", and the separation of the holding device 10 in the application zone converts the force applied in the CD direction to separate or disengage the holding device 10 from the application zone into a peeling force component and a shearing force component. It is understood that the pattern 14 in FIG. 1E is arranged such that when the holding device 10 is biased to open, the force exerted on the holding device 10 is divided at least between a first peeling force component and a second shearing force component. The same applies to the pattern in FIG. 1F.

[0214] Note that the patterns 14 from FIG. 1K to FIG. 1O have an alternation of zones 20 without the holding element 16 and patterns 14 in the CD direction, and also have a continuous zone 20 without the holding element 16 in the MD direction.

[0215] Regarding patterns 1K - 1O, FIGS. 10 - 14 each represent the peel curves obtained by the "180° peel" method by using the application zone 30 commercially available from APLIX under the reference name "SoftLoop Premium by APLIX", and include a card thermally bonded loop nonwoven fabric and an SMS nonwoven fabric assembled by thermal calendering.

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

[0217] The holding device 10 according to the patterns in FIGS. 1K - 1O is created according to the above "180 - degree peel" method.

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

[0219] Next, the assembly is placed within a tensile testing machine 210 including a 100 N measuring cell. An end 32a of the strip 32, i.e., the end opposite to the lower portion 32b, is inserted into an upper jaw 212. The reading of the force measuring cell is set to zero. A cut end 30a of the sample from the application zone 30, i.e., the side opposite to the uncut side 30b), is inserted into a lower jaw 214, and a slight tension is generated. The force must be included between 0.02 N and 0.05 N. During installation, the jaws 212, 214 are 50 mm apart from each other. The assembly is placed at the center between the two jaws 212, 214. The test is carried out with a constant movement at a speed of 305 mm / min (millimeters per minute), and the test stroke is 50 mm. This test stroke is adjusted as a function of the width of the holding device to be tested, enabling complete separation of the holding device and the application zone.

[0220] As can be seen from FIGS. 10 to 14, the peel curve has continuous peaks P1 to P4, and each peak has a maximum value greater than the maximum value of the peak preceding it in the direction of the opening stroke. That is, between two consecutive peaks taken two by two, the maximum value of the peak having the maximum abscissa is greater than the maximum value of the peak having the minimum abscissa, and vice versa. The maximum value of the peak having the minimum abscissa is smaller than the maximum value of the peak having the maximum abscissa. Thus, in FIG. 10, the maximum value of peak P1 is smaller than the maximum value of peak P2, the maximum value of peak P2 is smaller than the maximum value of peak P3, and the maximum value of peak P3 is smaller than the maximum value of peak P4. It should also be noted that the minimum values of valleys V1 to V3 are less than 50% of the maximum value of the peel force, i.e., the maximum value of peak P4.

[0221] The same also applies to the patterns in FIGS. 1L to 1N.

[0222] The peaks and valleys have tips and bottoms, and the bottoms may have a width of more than 1 mm, more specifically a width of more than 2 mm, and in some cases a width of more than 3 mm.

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

[0224] In the pattern of FIG. 1O, it can be seen that the minimum value of valley V2 is 50% or more of the maximum value of peak P3. It is also observed that the different peaks P1 to P3 are not marked as distinguishable like other curves (FIGS. 10 to 13). This is linked in particular to the width L measured in the CD direction of the continuous zone 20 that does not include the holding element 16 in the MD direction.

[0225] It is understood that the peel curve also depends on the nature of the application zone 30. However, application zones different from the application zone commercially available from APLIX under the reference name "SoftLoop Premium by APLIX" give peel curves with a similar profile, but the values of the peel force can vary depending on the application zone.

[0226] The peel curve is independent of the color and / or color difference ΔE between the zone 20 without a holding element and at least a part of the pattern 14 formed by the plurality of holding devices 16. * It is understood that it is irrelevant.

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

[0228] Although the present disclosure has been described with reference to specific 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. Additionally, the individual features of the various embodiments mentioned may be combined in additional embodiments. Accordingly, the description and drawings are to be considered in an illustrative rather than a limiting sense.

[0229] The present disclosure can find applications in the fields of hygiene, diapers, adult incontinence, the packaging industry, such as food packaging, ostomy, buildings, and the like.

Claims

1. A continuous base (12) having an upper surface (12A) and a lower surface (12B), and A plurality of holding elements (16) integrally formed with the base (12), which are rods extending from the upper surface (12A) of the base (12) and / or preforms and / or hooks in which hooks are formed by further processing, each holding element (16) including a rod (18), The base (12) includes at least one zone (20) that does not include the holding elements that are continuous in a direction orthogonal to the peeling direction such that the plurality of holding elements (16) form at least two patterns (14), The pattern (14) repeats in the peeling direction, and the peeling force measured by the "180° peeling" method has at least two peaks (P1 to P4) and at least one valley (V1 to V3) included 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 peeling force, The height (H) of the holding element (16) is 35 μm to 350 μm, and the height (H) of the holding element (16) measured perpendicular to the upper surface (12A) of the base (12) is 3 to 10 times the thickness (E) of the base (12), The diameter of the inscribed circle of each holding element (16) when viewed perpendicular to the upper surface (12A) is 80 μm or more and 500 μm or less, The minimum distance between two of the holding elements is from 0.1 mm to 10 mm, A holding device (10) that cooperates with a hook and / or a loop counterpart.

2. The holding device (10) according to claim 1, wherein the pattern (14) repeats in the peeling direction, the peeling force measured by the "180° peeling" method has at least three peaks and at least two valleys, each valley is included between two consecutive peaks, the maximum value of the peaks increases with the opening stroke, and the valleys have a minimum value that is 85% or less of the maximum value of the peeling force.

3. The holding device (10) according to claim 1, wherein the zone (20) without holding elements that is continuous in a direction perpendicular to the peeling direction has a width measured in the peeling direction that is two or more rows of holding elements measured in the peeling direction, preferably three or more rows of holding elements measured in the peeling direction.

4. The holding device (10) according to claim 1, wherein the zone without holding elements that is continuous in a direction perpendicular to the peeling direction has a width measured in the peeling direction that is 1% or more of the width of the base measured in the peeling direction.

5. The holding device (10) according to claim 1, wherein the color difference ΔE* between at least one of the zones without the holding elements and at least a part of the pattern formed by the plurality of holding elements in the CIE L*a*b* color space is 1.0 or more.

6. The holding device (10) according to claim 1, wherein the holding device includes the rod on which the head is placed.

7. The holding device (10) according to claim 1, wherein the surface of the zone without the holding elements is 5% or more of the entire surface of the base.

8. The holding device (10) according to claim 1, including a woven or non-woven fabric web (22) or a thermoplastic film or an elastic film or a composite film.

9. The holding device (10) according to claim 1, wherein the thickness (E) of the base (12) measured perpendicular to the upper surface (12A) of the base (12) is 10 to 700 μm.

10. A tape (26) for the holding device according to claim 1, the tape (26) being intended to be cut into a plurality of holding devices (10).

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