Laminated assembly, diaper comprising such assembly and method for manufacturing such assembly

Abstract

The present invention relates to a laminate assembly comprising a support layer (32) and an anti-slip strip (34), the anti-slip strip (34) comprising an elastomeric material, the support layer (32) and the anti-slip strip (34) being laminated together, the anti-slip strip (34) comprising a base (34A) and a plurality of protruding elements (34B) extending from the base (34A), and the plurality of protruding elements (34B) protruding from a surface (30A) of the laminate assembly (30). The invention also relates to a diaper comprising such a laminate assembly (30) and to a method for manufacturing a laminate assembly (30). The invention also relates to a diaper comprising such an assembly and to a method for manufacturing such an assembly.

Description

[0001] This application is a divisional application of Eplux Corporation's invention patent application (filed on March 20, 2019, application number 201980020940.8, entitled "Laminated Assembly, Diaper Including Such Assembly and Method for Manufacturing Such Assembly"). Technical Field

[0002] This disclosure relates to laminated components that can be used in the hygiene field, particularly absorbent articles, especially for the elastic loops in the manufacture of diapers. Background Technology

[0003] Disposable diapers typically consist of an absorbent central section, each end of which includes a front waistband portion with two front loops and a back waistband portion with two back loops for attaching the diaper to the wearer. Each back loop is typically provided with a retaining device, such as a hook, which engages with an application area arranged on the front loop. In the hygiene field, this application area is often referred to as the "landing zone," or in French, the "comfort zone."

[0004] However, due to the movement of the diaper wearer, the diaper may sag at the ears and / or the front ear may move relative to the back ear. This sag and / or displacement may cause discomfort to the diaper wearer and / or lead to unwanted leaks. Summary of the Invention

[0005] The present invention aims to correct at least some of these drawbacks.

[0006] Therefore, the present invention relates to a laminated assembly comprising a support layer and an anti-slip strip comprising an elastomeric material, the support layer and the anti-slip strip being laminated together, the anti-slip strip comprising a base and a plurality of protruding elements extending from the base, the plurality of protruding elements protruding from the surface of the laminated assembly.

[0007] By means of anti-slip strips, particularly protruding elements, the displacement of another surface relative to the anti-slip strip is reduced when the laminated assembly comes into contact with it. However, the protruding elements do not allow the anti-slip strip to engage and hook with the other surface. For example, anti-slip strips make it impossible to suspend a 1 kg weight for 10 seconds. In some cases, the 180° peel force of the anti-slip strip is less than or equal to 0.02 N, and in others it is equal to 0 N.

[0008] Direction MD refers to the machine direction and the direction in which the anti-slip strip travels within the machine during manufacturing. Direction CD refers to the intersecting direction and the direction perpendicular to direction MD.

[0009] The "180° peel" method is a method for measuring peel force, that is, the force that separates the laminated assembly from the area of ​​application. This method is described below.

[0010] Sample conditioning – Condition the test sample at 23°C ± 2°C and 50% ± 5% relative humidity for 2 hours.

[0011] Preparation of Anti-slip Strips – Anti-slip strips are typically used along the MD direction. The anti-slip strip is usually in the form of a strip whose length is along the MD direction. The MD portion of the strip is attached to 80 g / cm² paper, and a 2 kg roller is applied or the roller is rotated along one direction on the anti-slip strip. Then, the roller is applied or the roller is rotated again along the entire length of the strip portion at a speed of approximately 700 mm / min in the other direction (back and forth). The paper and anti-slip strip are cut into strips 25.4 mm wide along the MD direction using scissors. Each strip is 210 mm long, with the anti-slip strip located in the center of the paper.

[0012] Preparation of the application area – The width of the application area sample along the direction MD is 50 mm and the maximum length is 200 mm, and the sample is longitudinally cut into two halves.

[0013] Assembly – Place the strip on the application area sample, ensuring the anti-slip strip is centered on the sample. Apply a 2 kg roller or rotate the roller in one direction onto the anti-slip strip, then apply the roller or rotate the roller in the other direction (back and forth) at approximately 700 mm / min along the entire length of the belt. Place the application area sample in the clamp of the winch, with the cut side in the clamp, and suspend a 1 kg weight from the bottom of the belt for 10 seconds. Then remove the weight. This step ensures the anti-slip strip and application area sample are assembled.

[0014] Measurement – ​​The component is then placed in a tensile testing machine with a 100N (Newton) measuring unit. The strip is inserted into the upper (movable) jaw. The reading of the force measuring element is set to zero. The application area sample is inserted into the lower (fixed) jaw, and a slight tension is applied. The force must be between 0.02N and 0.05N. During insertion, the jaw spacing is 50mm. The component is centered between the two jaws. The test is performed with a constant displacement at a speed of 305mm / min, with a test stroke of 50mm. This test stroke is adjusted according to the width of the retaining device being tested.

[0015] Because the anti-slip strip is made of an elastomer material, it is elastic. This elasticity imparts elasticity to the laminated assembly. Therefore, when the laminated assembly is used, it can be stretched, and the anti-slip strip itself is stretched as well. This stretching of the laminated assembly allows for the application of a pressure, for example, when attaching a disposable diaper to the wearer, that is greater than the pressure applied by the laminated assembly when it is not stretched. This higher pressure also reduces the risk of movement and / or displacement of surfaces in contact with the anti-slip strip relative to it.

[0016] Because the anti-slip strip is made of an elastomer material, it has a soft touch for both the wearer and the person handling the diaper, and minimizes the risk of skin irritation.

[0017] As non-limiting examples of elastomeric materials, styrene / isoprene (SI), styrene / isoprene / styrene (SIS), styrene / butadiene / styrene (SBS), styrene-ethylene / butene-styrene (SEBS), styrene-ethylene / propylene-styrene (SEPS), or SIBS copolymers may be mentioned. Mixtures of these elastomers mixed with each other or with non-elastomeric materials may also be considered to alter certain properties other than elasticity. For example, to alter certain properties of the substrate (elasticity, heat resistance, processability, UV resistance, colorability, etc.), up to 50% (or mass%) but preferably less than 30% (or mass%) of polymers such as polyvinylstyrene, polystyrene or poly-α-methylstyrene, epoxy polyesters, polyolefins such as polyethylene or certain ethylene / vinyl acetate, preferably those with high molecular weight (higher molar mass) may be added.

[0018] The elastomer material can be, in particular, styrene-isoprene-styrene, which may be available, for example, under the name KRATON D (registered trademark) from Kraton Polymers, or under the name VECTOR SBC 4211 (registered trademark) from Dexco Polymers LP. Thermoplastic elastomer (TPE) materials may also be used, particularly thermoplastic polyurethane elastomers, including PELLETHANE (registered trademark) 2102-75A from Dow Chemical Company. Styrene-butadiene-styrene may also be used, including KRATON D-2122 (registered trademark) from Kraton Polymers, or VECTOR SBC 4461 (registered trademark) from Dexco Polymers LP. Alternatively, styrene-ethylene / butene, including KRATON G-2832 (registered trademark) from Kraton Polymers, or styrene-ethylene-butene-styrene (SEBS) block copolymers, including KRATON G2703 (registered trademark).

[0019] This list is not exhaustive and can be completed using all of the following: hydrogenated polyisoprene polymers, such as styrene-ethylene-propylene-styrene (SEPS), styrene-ethylene-propylene-styrene-ethylene-ethylene-propylene (SEPSEP); hydrogenated polybutadiene polymers, such as styrene-ethylene-butene-styrene (SEBS), styrene-ethylene-butene-styrene-ethylene-butene-ethylene-butene (SEBSEB), styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS), styrene-isoprene-butadiene-styrene (SIBS); hydrogenated polyisoprene / butadiene polymers, such as styrene-ethylene-ethylene-ethylene-propylene-styrene (SEEPS); and commercially available vinyl hydrogenated polyisoprene / hydrogenated polyisoprene / polyisoprene / polystyrene triblock polymers, such as HYBRAR 7311 (KurarayAmerica, Inc., Houston, Tex.), and combinations thereof.

[0020] This disclosure also considers the configurations of polymer blocks, such as diblock, triblock, multiblock, star-shaped, and radial. In some cases, block copolymers with higher molecular weights (or molar masses) may be desired. Block copolymers are available from Kraton Polymers US LLC of Houston, Tex. under the names, for example, Kraton MD6716, Kraton D1102, Kraton SIBS D1102, Kraton D1184, Kraton FG1901, and Kraton FG1924, and from Septon Company of America, Pasadena, Tex. under the names Septon 8007, Septon V9827, and Septon 9618. Dynasol of Spain is another potential supplier of these polymers. In particular, the Kraton MD6716 SEBS triblock polymer is particularly suitable for this disclosure.

[0021] Alternatively, a copolymer of isooctyl acrylate and acrylic acid with a monomer ratio of 90 / 10 can be used, which is a thermoplastic that has physical crosslinking in the absence of a crosslinking agent. Alternatively, PEBAX (registered trademark) 2533, a polyamide-polyester block copolymer from Arkema, can also be used.

[0022] Other possible materials are polyolefin polymers with elastomeric properties, primarily copolymers of ethylene and / or propylene, especially those derived from metallocene catalysis, such as VISTAMAXX VM-1120 (registered trademark) available from Exxon Mobil Chemical, or rubber-filled polymers, such as EPDM-filled Santoprene.

[0023] Examples of polyolefin-based thermoplastic elastomers suitable for use in elastomeric films include, in particular, crystalline polyolefins, such as homopolymers or copolymers of α-olefins having 1 to 20 carbon atoms and including 1 to 12 carbon atoms.

[0024] The homopolymers and copolymers described below are examples of crystalline polyolefins.

[0025] (1) Ethylene homopolymers, which can be prepared by any low-pressure and high-pressure method.

[0026] (2) A copolymer of ethylene with not more than 10 mol% of an α-olefin other than ethylene or vinyl monomers (such as vinyl acetate and ethyl acrylate); for example, an ethylene-octene copolymer, available under the trademarks Engage 8407 or Engage 8842 (Dow Chemical, Houston, Tex.).

[0027] (3) Propylene homopolymers; examples include polypropylene impact copolymer PP7035E4 and polypropylene random copolymer PP9574E6 (Exxon Mobil, Houston, Tex.).

[0028] (4) A random copolymer of propylene with no more than 10 mol% of α-olefin-olefin other than propylene.

[0029] (5) Block copolymers of propylene with no more than 30 mol% of α-olefins other than propylene.

[0030] (6) Homopolymer of butene-1-butene.

[0031] (7) Random copolymers of 1-butene with no more than 10 mol% of α-olefin-olefins other than 1-butene.

[0032] 8) 4-Methyl-1-pentene homopolymer 4-Methyl-1-pentene homopolymer.

[0033] (9) Random copolymers of 4-methyl-1-pentene and not more than 20 mol% of α-olefins other than 4-methyl-1-pentene.

[0034] α-olefins include, for example, ethylene, propylene, 1-butene, 4-methyl-1-pentene, 1-hexene, and 1-octene.

[0035] Commercially available polyolefin-based thermoplastic elastomers for use in elastomeric films include VISTAMAXX™ (propylene-based elastomers, available from ExxonMobil Chemical, Houston, Tex.), INFUSE™ (olefin block copolymers, available from Dow Chemical Company, Midland, Michigan), VERSIFY™ (propylene-ethylene copolymers), such as VERSIFY™ 4200 and VERSIFY™ 4300 (Dow Chemical Company, Midland, Michigan), ENGAGE™ (ethylene-octane copolymers, available from Dow Chemical, Houston, Tex.), and NOTIO 0040 and NOTIO 3560 (available from Mitsui Chemical (USA), New York, NY), and AdflexX100 G (available from Lyondellbasell).

[0036] In particularly suitable embodiments, the polyolefin-based thermoplastic elastomer is VISTAMAXX.TM. 6102FL or VISTAMAXX 7050 FLX (available from ExxonMobil Chemical, Houston, Tex.). The symbol ".TM" in the registered trademark name corresponds to "trademark".

[0037] In another case, the thermoplastic elastomer may be a thermoplastic ester / ether elastomer or a thermoplastic polyurethane.

[0038] Elastomer materials are materials that can be stretched without breaking under a tensile force applied in a given direction and can substantially return to their original shape and size after the tensile force is released. For example, an elastomeric material is a film that, at room temperature (23°C–°C), retains less than or equal to 30%, preferably less than or equal to 20%, and even more preferably less than or equal to 10% of its initial size (before stretching) after stretching and release, for 100% elongation of its initial size. (Residual deformation is also referred to as “permanent setting” or “SET”). Elastomer materials can be thermoplastic elastomers, particularly physically crosslinked thermoplastic elastomers such as those described in this disclosure, or chemically crosslinked thermoplastic elastomers.

[0039] In some embodiments, at room temperature (23°C), for 100% elongation of its initial size, the residual deformation of the antislip strip is less than or equal to 30% of its initial size (before elongation), preferably less than or equal to 20%, even more preferably less than or equal to 15%, and even more preferably less than or equal to 10%.

[0040] In some embodiments, at room temperature (23°C), for 100% elongation of its initial size, the residual deformation of the antislip strip is less than or equal to 30% of its initial size (before elongation), preferably less than or equal to 20%, even more preferably less than or equal to 15%, and even more preferably less than or equal to 10%.

[0041] In some embodiments, the support layer is composed of nonwoven web.

[0042] Nonwoven webs are products obtained by forming webs of consolidated fibers and / or filaments. Consolidation can be mechanical, chemical, or thermal and involves bonding between the fibers and / or filaments. This consolidation can be direct, i.e., directly between the fibers and / or filaments by welding, or it can be indirect, i.e., through an intermediate layer between the fibers and / or filaments, such as an adhesive layer or bonding layer. The term nonwoven fabric refers to a ribbon or mesh structure of fibers and / or filaments interwoven in a non-uniform, irregular, or random manner. Nonwoven fabrics can be made from a variety of synthetic and / or natural materials. Examples of natural materials are cellulose fibers, such as cotton, jute, flax, etc., and may also include reprocessed cellulose fibers, such as rayon or viscose. Natural fibers used for nonwoven webs can be prepared using various methods such as carding. Examples of synthetic materials include, but are not limited to, synthetic plastic polymers known to form fibers, including but not limited to: polyolefins, such as polyethylene, polypropylene, polybutene, etc.; polyamides, such as polyamide 6, polyamide 6,6, polyamide 10, polyamide 12, etc.; polyesters, such as polyethylene terephthalate, polybutylene terephthalate, polylactic acid, etc.; polycarbonate; polystyrene; thermoplastic elastomers; vinyl polymers; polyurethanes; and blends and copolymers thereof.

[0043] In some embodiments, the support layer may have a single-layer or multi-layer structure. The support layer may also be combined with another material to form a laminate. For example, the nonwoven fabric may be a spunbond, spunmelt, or thermally bonded carded nonwoven fabric, and the support layer may be SMS, SMMS, SS, SSS, SSMMS, SSMMMS, air-permeable, or others. These examples are given in a non-limiting manner.

[0044] Nonwoven webs are formed, for example, from webs of fibers and / or filaments, which are produced by dry web forming (dry web forming), wet web forming (wet web forming), or spun web technology (melt / extrusion) and are bonded together by mechanical, chemical, and / or adhesive bonding.

[0045] Nonwoven webs can be calendered and carded nonwovens.

[0046] Calendered and carded nonwovens are nonwovens comprising fiber webs having web bond points that are substantially uniformly distributed across the web through thermal consolidation. This consolidation ensures a certain degree of cohesion in the fibers, allowing them to be handled and transported, particularly wound into rolls and unwound. The activation of the calendered and carded nonwoven web allows for the elongation and / or disruption of the fibers and / or deformation of the web bond points. This thus improves the elongation capacity of the nonwoven web.

[0047] The fibers of the calendered carded nonwoven web are included between 1 dTex and 8 dTex, preferably between 1.3 dTex and 6.7 dTex, and more preferably between 1.6 dTex and 5.5 dTex.

[0048] Tex is the SI unit for the fineness of textile fibers. It represents the weight of 1000m (meter) of fiber length.

[0049] In some embodiments, the support layer may include a nonwoven web forming the collection yarn, particularly the collection yarn of an absorbent article.

[0050] In some embodiments, the carrier layer may include a thermoplastic film.

[0051] Thermoplastic film refers to a film made of thermoplastic material, which can be an elastic material or a non-elastic material.

[0052] A thermoplastic film of an elastic material is a film that can be stretched without breaking under a tensile force applied in a given direction, and can substantially return to its original shape and size after the tensile force is released. For example, a thermoplastic film of an elastic material is a film that, at room temperature (23°C), for 100% elongation of its initial size, retains less than or equal to 30% of its initial size (before elongation), preferably less than or equal to 20%, and even more preferably less than or equal to 10% of its residual deformation or remainder (residual deformation is also called "permanent set" or "SET").

[0053] Thermoplastic films made of non-elastic materials are those that do not fall within the definition of thermoplastic films made of elastic materials.

[0054] When the thermoplastic film is made of a non-elastic material, the elasticity of the laminate is imparted by the elastomeric material of the anti-slip strip, for example by using a nonwoven fabric with a weight of less than 30 g / m².

[0055] Non-limiting examples of thermoplastic materials may include polyolefins, polyethylene, linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), metallocene polyethylene (m-PE), high-density polyethylene (HDPE), EVA (ethylene vinyl acetate), and PP (polypropylene), which include unimodal or multimodal (e.g., bimodal) molecular weight (molar mass) distributions, particularly compositions comprising LLDPE and plasmons (especially polyethylene-based plasmons). Polyamides (PA), polylactic acid (PLA), polyhydroxyalkanoates (PHA), PVOH, PBS, polyesters, polyvinyl chloride (PVC), or acrylonitrile butadiene styrene (ABS) may also be used.

[0056] In some embodiments, the thermoplastic film is an elastic film.

[0057] As a non-limiting example of an elastomeric material used to form an elastic membrane, the same material as the elastomeric material cited as a non-limiting example of an elastomeric material used to manufacture anti-slip strips may be mentioned.

[0058] In some embodiments, the elastic membrane may be formed from an elastic adhesive.

[0059] In some embodiments, the elastic membrane may include more than one layer or be a “skin layer,” that is, an elastic membrane covered by skin.

[0060] In some embodiments, the elastic membrane may be formed from an elastic adhesive.

[0061] In some embodiments, the elastic adhesive film can be extruded onto the nonwoven web and then laminated with the nonwoven web.

[0062] In some embodiments, the support layer consists of a nonwoven web and an elastic membrane.

[0063] In some embodiments, both the base of the anti-slip strip and the elastic membrane have a width, wherein the width of the base is less than the width of the elastic membrane, and preferably, the width of the base is greater than or equal to 10% of the width of the elastic membrane and less than or equal to 60% of the width of the elastic membrane.

[0064] In some embodiments, both the area of ​​the protruding element and the base of the anti-slip strip have a width, and the width of the area of ​​the protruding element is less than the width of the base of the anti-slip strip, preferably less than or equal to 60% of the width of the base, and even more preferably less than or equal to 45% of the width of the base.

[0065] In some embodiments, the support layer may include a first nonwoven web, a second nonwoven web, and an elastic membrane, the elastic membrane being laminated between the first nonwoven web and the second nonwoven web.

[0066] In some embodiments, in a static state, in the area including the protruding element, the anti-slip strip has a static friction coefficient measured according to standard ASTM D1894, which is greater than or equal to 0.1 along the direction MD and / or the direction CD, preferably greater than or equal to 0.5, even more preferably greater than or equal to 0.8, and less than or equal to 10, preferably less than or equal to 5, even more preferably less than or equal to 3.

[0067] "In a static state" means that the laminated assembly is not subjected to external forces, such as tensile forces. In other words, for example in the diaper industry, "in a static state" means testing the laminated assembly immediately after packaging, before the end user's first use, i.e., before placing the diaper on a person. Measurements of the static coefficient of friction can be performed along the longitudinal and / or lateral directions, which are orthogonal to the longitudinal direction. Measurements of the static coefficient of friction can be performed along the MD direction and / or the CD direction.

[0068] Direction MD refers to the machine direction and the direction in which the anti-slip strip travels within the machine during manufacturing. Direction CD refers to the intersecting direction and the direction perpendicular to direction MD.

[0069] In some embodiments, the anti-slip strip has a static friction coefficient measured according to standard ASTM D1894, wherein the static friction coefficient is included between 50% and 150% of the static friction coefficient in the static state when the anti-slip strip is stretched to 15% of its static value.

[0070] The static friction coefficient can be measured along the longitudinal direction and / or the lateral direction, which is orthogonal to the longitudinal direction. The static friction coefficient can also be measured along the MD direction and / or the CD direction.

[0071] The dimension of the anti-slip strip along direction MD is larger than the dimension along direction CD.

[0072] In some embodiments, the weight per unit area of ​​the anti-slip strip is greater than or equal to 10 g / m², preferably greater than or equal to 20 g / m², and less than or equal to 250 g / m², preferably less than or equal to 200 g / m².

[0073] In some embodiments, the support layer is bonded together by an adhesive.

[0074] The adhesive can be applied continuously in the longitudinal direction and discontinuously in the lateral direction. Therefore, the adhesive forms, for example, multiple adhesive lines that are continuous in the longitudinal direction. Of course, the width of the adhesive lines and their lateral spacing can be varied.

[0075] To measure the properties of elastomer materials, the support layer can be separated from the elastomer material using, for example, acetone and / or ethyl acetate.

[0076] Elastic membranes can be formed from elastic adhesives.

[0077] The elastic adhesive film can then be extruded onto the nonwoven web and then laminated with it. The activation region can extend along the entire length of the nonwoven web, measured in the longitudinal direction.

[0078] In some embodiments, the support layer is assembled by ultrasonic welding.

[0079] In the manufacture of laminated components, ultrasonic welding is performed by passing a support layer between two rollers, one of which is an ultrasonic generator. Both rollers apply force perpendicular to the total plane defined by the support layer, thus laminating the support layer during ultrasonic welding.

[0080] In some embodiments, the support layer is joined by two methods selected from the following list: ultrasonic welding, high-frequency welding, adhesive bonding, or direct lamination (also known as thermal lamination).

[0081] In some embodiments, in a static state, the density of the plurality of protruding elements is greater than or equal to 3 protruding elements per cm², preferably greater than or equal to 10 protruding elements per cm², and less than or equal to 400 protruding elements per cm², preferably less than or equal to 300 protruding elements per cm².

[0082] In some embodiments, in a stationary state, the plurality of protruding elements have a pattern, the pattern including a repeating antislip strip pattern that extends across the entire width of the antislip strip.

[0083] The dimension of the anti-slip strip along direction MD is larger than the dimension along direction CD.

[0084] In some embodiments, the sum of the areas defined by the orthogonal projections of the protruding elements on the base is greater than or equal to 1% of the total area of ​​the base of the antislip strip pattern, preferably greater than or equal to 5% of the total area of ​​the base of the antislip strip pattern, and less than or equal to 60% of the total area of ​​the base of the antislip strip pattern, preferably less than or equal to 40% of the total area of ​​the base of the antislip strip pattern, more preferably less than or equal to 35% of the total area of ​​the base of the antislip strip pattern.

[0085] In some embodiments, the thickness of the base is greater than or equal to 10µm, preferably greater than or equal to 15µm, and less than or equal to 200µm, preferably less than or equal to 150µm.

[0086] In some embodiments, the thickness of the substrate is variable.

[0087] In some embodiments, the protruding element has a variable width.

[0088] The width of the protruding element is measured in a plane parallel to the base (XY plane). The width of the protruding element is measured at the point where the protruding element has the maximum width.

[0089] In some embodiments, the protruding element may include protruding elements with different heights and / or different widths, measured in a plane parallel to the XY plane.

[0090] In some embodiments, the protruding element is a pin and / or a stud and / or a rod, each rod having a head at one end opposite the base.

[0091] The head is positioned at the end of the protruding element opposite to the base, particularly on the upper surface of the base.

[0092] A "pin" is a shape without a head or overhang and with a maximum height greater than or equal to its maximum width. A "stud" is a shape with a maximum height less than its maximum width. Pins, studs, or rods have a portion with a constant cross-section or a portion with a reduced cross-section facing away from the base.

[0093] In some embodiments, the height of the protruding element in the direction perpendicular to the base is greater than or equal to 0.05 mm, preferably greater than or equal to 0.10 mm, and less than or equal to 0.80 mm, preferably less than or equal to 0.50 mm.

[0094] In some embodiments, in a static state, the width of the anti-slip strip is greater than or equal to 5% of the total width of the laminated assembly, preferably greater than or equal to 10%, and less than or equal to 45%, preferably less than or equal to 30%.

[0095] These values ​​are applicable, for example, to applications involving baby or children's diapers or adult incontinence diapers.

[0096] In some embodiments, in a static state, the width of the anti-slip strip is included between 25% and 75% of the total width of the laminated assembly.

[0097] These values ​​are applicable to applications such as absorbent fabrics, including baby or child diapers, adult incontinence diapers, or feminine hygiene products. These values ​​can be measured once the absorbent fabric is assembled.

[0098] In some embodiments, in a static state, the width of the anti-slip strip is included between 55% and 100% of the total width of the laminated assembly.

[0099] These values ​​are applicable, for example, to applications of absorbent materials, such as feminine hygiene products. These values ​​can be measured once the absorbent material is assembled.

[0100] In some embodiments, the support layer penetrates at least partially into the base of the anti-slip strip, for example, the support layer is bonded to the anti-slip strip by direct lamination.

[0101] In some embodiments, the anti-slip strip is integrated into the support layer.

[0102] In some embodiments, the anti-slip strip is welded to the support layer by ultrasonic welding.

[0103] In some embodiments, the anti-slip strip and the elastic membrane are made of the same elastomeric material.

[0104] In some embodiments, the anti-slip strips and elastic membranes are made of different elastomeric materials.

[0105] In some embodiments, the nonwoven web is activated before and / or after being bonded to the elastic membrane.

[0106] In some embodiments, the base of the anti-slip strip may include two edges along a longitudinal direction, one of which has a peak and a valley, wherein the maximum deviation between the peak and valley in a lateral direction orthogonal to the longitudinal direction is less than 1 mm compared to the length along the longitudinal direction corresponding to three consecutive peaks.

[0107] In some embodiments, when viewed in cross-section along the longitudinal direction, the edges have a circular shape.

[0108] In some embodiments, the maximum distance between peaks and valleys in a lateral direction orthogonal to the longitudinal direction and in the longitudinal length corresponding to three consecutive peaks is included between 0.001 mm and 1 mm, more particularly between 0.001 mm and 0.5 mm, and even more particularly between 0.001 mm and 0.1 mm.

[0109] In some embodiments, the three consecutive peaks are less than the distance corresponding to the 15 steps of the protruding element, preferably less than 25 mm.

[0110] In some embodiments, the width of the base is greater than or equal to 1 mm, preferably greater than or equal to 3 mm, even more preferably greater than or equal to 5 mm, and less than or equal to 500 mm, preferably less than or equal to 250 mm, even more preferably less than or equal to 100 mm.

[0111] In some embodiments, the rod of the protruding element is rotationally symmetrical about an axis perpendicular to the upper surface of the base.

[0112] In some embodiments, the protruding element has an asymmetrical geometry relative to the longitudinal direction transverse to the base.

[0113] In some embodiments, the protruding element is planar symmetrical with respect to the axis of the rod extending longitudinally along the base and passing through the protruding element.

[0114] In some embodiments, the support layer consists of a first nonwoven web and a second nonwoven web.

[0115] In some embodiments, the first nonwoven web and the second nonwoven web have the same properties.

[0116] In some embodiments, the first nonwoven web and the second nonwoven web are different in nature.

[0117] In some embodiments, both the first nonwoven web and the second nonwoven web include an inactive region 3 and an activated region prior to assembly.

[0118] The anti-slip strip can be bonded and / or ultrasonically welded to the upper surface of the support layer. The anti-slip strip can also be joined by direct lamination before the base of the anti-slip strip is fully cured, resulting in the support layer at least partially penetrating into the base.

[0119] In the case where the support layer is a set of thermo-bonded fibers and / or filaments, bonding with the base is also achieved by penetrating into the base of some fibers and / or filaments in the support layer.

[0120] If the support layer is a nonwoven web, protruding elements can be easily removed from the mold even when using a nonwoven fabric with a weight of less than 80 g / m² (the material mass of the nonwoven fabric, expressed in grams per square meter). For example, the weight of the nonwoven fabric can be between 5 g / m² and 120 g / m², or between 25 g / m² and 100 g / m², or between 10 g / m² and 70 g / m².

[0121] A particular advantage of this method of joining the support layer to the base, which includes the protruding element, is that it does not cause deformation of the base, thus advantageously allowing the shape of the base obtained during the injection molding step to be maintained, and in particular, maintaining the straight edges obtainable by the methods and equipment described below.

[0122] This disclosure also relates to an absorbent article, particularly a disposable diaper, said absorbent article comprising the laminated components defined above.

[0123] In some embodiments, anti-slip strips of the laminated assembly are arranged on the elastic tabs of the absorbent article and / or on the non-elastic tabs of the absorbent article, the non-elastic tabs including, for example, nonwoven fabrics.

[0124] In some embodiments, the anti-slip strip of the laminated assembly is arranged on the resilient portion (such as an elastic lug) of the absorbent article such that the protruding elements of the anti-slip strip extend toward the absorbent portion of the absorbent article.

[0125] In some embodiments, the antislip strip of the laminated assembly is arranged on the non-elastic portion (e.g., non-elastic lug) of the absorbent article such that the protruding elements of the antislip strip extend away from the absorbent portion of the absorbent article.

[0126] This disclosure also relates to a method for manufacturing a laminated assembly, the method comprising the following steps: -An anti-slip strip is formed by dispensing elastomeric material in a molding apparatus, the anti-slip strip including a base and a plurality of protruding elements extending from the base; - The support layer and anti-slip strip are assembled by laminating the support layer and anti-slip strip.

[0127] Direction MD refers to the machine direction and the direction in which the support layer travels in the machine during the manufacturing of the laminated assembly. Direction CD refers to the transverse direction and the direction perpendicular to direction MD.

[0128] In some embodiments, the forming apparatus may include a forming strip with a thickness between 100 µm and 500 µm.

[0129] In some embodiments, the assembly of the support layer and the anti-slip strip is performed before the base of the anti-slip strip is fully cured, such that the support layer penetrates at least partially into the base.

[0130] In some embodiments, the support layer may include a nonwoven web, and the distribution of elastomeric material in the forming apparatus is achieved through the nonwoven web.

[0131] In some embodiments, the assembly of the support layer and the anti-slip strip is performed by adhesive bonding.

[0132] In some embodiments, the assembly of the support layer and the anti-slip strip is performed by ultrasonic welding.

[0133] In some embodiments, the support layer may include an elastic membrane formed by dispensing an elastomeric material in a molding apparatus.

[0134] In some embodiments, the support layer may include an elastic membrane and at least one nonwoven fabric, with the antislip strip bonded to the support layer via at least one nonwoven fabric layer.

[0135] In some embodiments, the support layer may include a nonwoven web and an elastic membrane, the elastic membrane being woven by dispensing an elastomeric material in a forming apparatus, and the nonwoven web being assembled prior to complete curing of the elastic membrane, such that the nonwoven web penetrates at least partially into the elastic membrane.

[0136] In some embodiments, after the elastomeric material of the anti-slip strip has been dispensed, the elastomeric material of the elastic membrane is dispensed into the molding apparatus.

[0137] In some embodiments, the anti-slip strip and the elastic membrane are made of the same elastomeric material.

[0138] In some embodiments, the support layer may include a second nonwoven web, the assembly of which is performed before the elastic membrane is fully cured, such that the second nonwoven web penetrates at least partially into the elastic membrane.

[0139] In some embodiments, the support layer may include a second nonwoven web, the assembly of which is achieved by bonding and / or ultrasonically welding the second nonwoven web to the elastic membrane.

[0140] In some embodiments, the forming apparatus may include a forming strip and a rotary drive device, wherein an anti-slip strip is formed on the forming strip.

[0141] In some embodiments, the forming apparatus may include means for forming the head of the protruding element, including a drive roller and a forming roller.

[0142] In some embodiments, the drive roller and the forming roller rotate at different speeds, resulting in an asymmetrical head of the protruding element.

[0143] In some embodiments, the ratio of the speed of the drive roller to the speed of the forming roller is greater than or equal to 0.4, preferably greater than or equal to 0.65, and less than or equal to 1.6, preferably less than or equal to 1.35.

[0144] In some embodiments, the ratio of the speed of the drive roller to the speed of the forming roller is greater than or equal to 0.4, preferably greater than or equal to 0.65, and strictly less than 1.

[0145] In some embodiments, the ratio of the speed of the drive roller to the speed of the forming roller is equal to 1.

[0146] In some embodiments, the drive roller and the forming roller rotate at equal speeds, such that the head of the protruding element is symmetrical and flat. Attached Figure Description

[0147] Other features and advantages of the subject matter of this disclosure will become apparent from the following description of embodiments given by way of non-limiting example, with reference to the accompanying drawings.

[0148] - Figure 1 This is a diagram of a diaper.

[0149] - Figure 2A According to the lamination assembly of the first embodiment Figure 1 A schematic cross-sectional view of plane II-II.

[0150] - Figure 2B This is a schematic exploded cross-sectional view of the support layer.

[0151] - Figures 3 to 5 This is a schematic cross-sectional view of a laminated assembly according to other embodiments.

[0152] - Figure 6 This is a schematic cross-sectional view of the anti-slip strip.

[0153] - Figure 7 This is a partial schematic cross-sectional view of a laminated assembly according to other embodiments.

[0154] - Figure 8 AF is a schematic cross-sectional view and top view of different embodiments of the anti-slip strip.

[0155] - Figure 9 This is a partial schematic diagram of the top of the forming strip.

[0156] - Figure 10 and Figure 11 yes Figure 9 A schematic cross-sectional view of the forming strip in the diagram.

[0157] - Figure 12 yes Figure 9 An enlarged schematic diagram of the pattern in region XII of the molding strip.

[0158] - Figure 13 This is a schematic diagram of the pattern of the elements of the molding strip according to other embodiments.

[0159] - Figure 14 It is based on Figure 13 A schematic cross-sectional view of the plane XIV-XIV of the forming strip in the middle.

[0160] - Figures 15-18 This is a schematic diagram of a molded strip pattern according to other embodiments.

[0161] - Figure 19 A partial schematic cross-sectional view of the plane XIX-XIX of the forming strip is shown to form... Figure 18 The pattern.

[0162] - Figure 20 This is a schematic diagram of an example of equipment used to manufacture anti-slip strips.

[0163] - Figures 21 to 23 This is a schematic diagram of an example of equipment used to manufacture laminated components.

[0164] - Figures 24A-24C This is a schematic diagram of a laminated component.

[0165] - Figure 25 This is a schematic diagram of the test sample.

[0166] - Figure 26 This is a schematic diagram of a device used to perform measurements of elongation at break and / or deformation.

[0167] - Figure 27 It is a graph showing the elongation at break curves of laminated components including anti-slip strips and laminated components without such anti-slip strips.

[0168] - Figure 28 This is a schematic diagram of an example of equipment for manufacturing anti-slip strips, including a forming device.

[0169] - Figure 29 This is a top view of the anti-slip strip, showing the edge characteristics of the strip.

[0170] In all the accompanying drawings, common elements are identified by the same numerical reference numerals. Detailed Implementation

[0171] Figure 1 This is a schematic diagram of the height of, for example, a disposable diaper 10. The diaper 10 consists of an absorbent central portion 12, a front waistband 14 with two front loops 16, and a back waistband 18 with two back loops 20 for attaching the diaper 10 to the wearer. Each back loop 20 is typically provided with a retaining device 22, such as a hook, which engages with an application area 24 arranged on the front waistband 14. In the hygiene field, this application area 24 is commonly referred to as a "landing area," or in French, a "comfort belt."

[0172] Figure 2A A first embodiment of a laminated assembly 30 that can be used to manufacture the front ear 16 and / or back ear 20 of a diaper 10 is shown.

[0173] In the following text, the term "laminated assembly" will refer to an uncut laminated assembly and a laminated assembly cut into the front ear 16 and / or back ear 20 of the diaper 10.

[0174] exist Figure 2A China and Israel according to Figure 1 The cross-sectional view of section II-II shows the laminated assembly 30.

[0175] The laminated component 30 extends in the longitudinal direction X and the lateral direction Y, which are orthogonal to the longitudinal direction X. Figure 2AIn the cross-sectional view of section YZ, the transverse direction Z is orthogonal to the plane XY and defines the thickness direction of the laminate 30. The XYZ directions are orthogonal to each other.

[0176] Figure 2A The laminated assembly 30 consists of a support layer 32 and an anti-slip strip 34. The support layer 32 and the anti-slip strip 34 extend in the longitudinal direction X and the lateral direction Y. The laminated assembly 30 consists of an upper surface 30A and a lower surface 30B.

[0177] exist Figure 2A In the illustrated embodiment, the support layer 32 comprises a first nonwoven web 36, a second nonwoven web 38, and an elastic membrane 40 bonded together with an adhesive 42. The elastic membrane 40 is bonded between the first nonwoven web 36 and the second nonwoven web 38 by laminating the first nonwoven web 36, the second nonwoven web 38, the elastic membrane 40, and the adhesive 42.

[0178] like Figure 6 As shown, the anti-slip strip 34 includes a base 34A and a plurality of protruding elements 34B. The base 34A has an upper surface 34AA and a lower surface 34AB, and the protruding elements 34B extend from the base 34A (particularly from the upper surface 34AA of the base 34A). Along the lateral direction Y, the base 34A has a width L34A, and the protruding elements 34B have a width L34B. The width L34B of the protruding elements 34B is measured along the lateral direction Y between two lines parallel to the longitudinal direction X and parallel to the edge of the base 34A, and includes all the protruding elements 34B tangential to the protruding elements 34B. Figure 6 In one embodiment, the width L34A of the base 34A is greater than the width L34B of the protruding element 34B, that is, the width L34B of the protruding element 34B is less than or equal to the width L34A of the base 34A.

[0179] The protruding element 34B protrudes from the upper surface 30A of the laminate assembly 30.

[0180] The protruding element 34B can form an anti-slip strip pattern 44 on the anti-slip strip 34 (i.e., the base 34A, particularly the upper surface 34AA of the base 34A), and can have a region 46 without the protruding element 34B and a region of the anti-slip strip 34, with the protruding element 34B forming the anti-slip strip pattern 44. The anti-slip strip pattern 44 can be single or repeated multiple times on the anti-slip strip 34 along the longitudinal direction X and / or the lateral direction Y. The anti-slip strip pattern 44 can include a closed contour.

[0181] The base 34A has a thickness E34A in the transverse direction Z, and the protruding element 34B has a height H34B in the transverse direction Z. The height H34B of the protruding element 34B is perpendicular to the upper surface 34AA of the base and is measured between the base and the point where the protruding element 34B is farthest from the upper surface 34AA of the base 34A.

[0182] Multiple protruding elements 34B may include protruding elements 34B having different heights H34B and / or different widths L34BB, measured in a plane parallel to the XY plane. The width L34BB is measured at the location where the protruding element has the maximum width.

[0183] The protruding element 34B may be a pin and / or a stud and / or a rod, each rod having a head disposed at the end of the rod opposite to the base 34A. For a given anti-slip strip 30, the protruding element 34B may be of a single type, or may be a mixture of one or more types of protruding elements 34B.

[0184] like Figure 7 As shown, the anti-slip strip 34 includes a pin 34BB, which has a height H34B along the lateral direction Z and a width L34BB in a plane parallel to the plane XY. Figure 7 Only one pin 34BB is shown. The height H34B of pin 34BB is greater than or equal to the width L34BB. When the height H34B is less than the width L34BB, it is called a pin. A support layer 32 is laminated onto the anti-slip strip 34. In this embodiment, the support layer is formed of a nonwoven web, a portion of which has fibers penetrating the base 34A of the anti-slip strip. Therefore, it is understood that the assembly of the support layer 32 and the anti-slip strip 34 is performed before the base 34A of the anti-slip strip 34 is fully cured, resulting in the support layer 32 at least partially penetrating into the base 34A. Figure 7 As shown, an anti-slip strip 34 and a support layer 32 comprising a nonwoven web are illustrated. This nonwoven web can form the front ear 16 and / or back ear 20 of the diaper 10. In particular, the anti-slip strip 34 can be arranged on the front ear 16 such that the protruding element extends toward and / or away from the absorbent portion of the absorbent article.

[0185] exist Figures 20 to 23 The image shows a protruding element consisting of a rod covered on top with a head.

[0186] Figure 2B It is based on Figure 2A An exploded view of the two support layers 32 is shown, illustrating possible ways in which the support layers 32 are joined. Figure 2B The image shows two support layers 32 joined together. To form support layers 32, an elastic film and an adhesive film have been laminated together after the nonwoven web, forming the entire... Figure 2B Cut in the middle to form two support layers 32.

[0187] exist Figure 2B In the illustrated embodiment, the support layer 32 is composed of a first nonwoven web 36 and a second nonwoven web 38. The first nonwoven web 36 and the second nonwoven web 38 may have the same or different properties.

[0188] exist Figure 2B In the illustrated embodiment, both the first nonwoven web 36 and the second nonwoven web 38 include inactive regions 36A and 38A and active regions 36B and 38B before assembly.

[0189] exist Figure 2B In the illustrated embodiment, the activation regions 36B and 38B are equal in size along the lateral direction Y. They may differ from one web to another and / or within the same web. Since the support layer is activated after bonding with the elastic membrane 40, the first nonwoven web 36 and the second nonwoven web 38 may also not have activation regions.

[0190] Adhesive 42 is applied to the first nonwoven web 36 and the second nonwoven web 38. Adhesive 42 is disposed in solid strips 42A and in fine threads 42B. Thus, adhesive 42 forms, for example, multiple adhesive threads 42B continuous along the longitudinal direction X. The elastic membrane 40 has a width L40. The width L34A of the base 34A of the anti-slip strip 34 is smaller than the width L40 of the elastic membrane 40. Figure 2A In the example, the width L34A of the base 34A of the anti-slip strip 34 corresponds to 25% of the width L40 of the elastic membrane 40.

[0191] The anti-slip strip 34 can be bonded and / or ultrasonically welded to the upper surface 30A of the support layer 32. The anti-slip strip 34 can also be bonded by laminating the anti-slip strip 34 before the base 34A of the anti-slip strip 34 is fully cured, resulting in the support layer 32 being... Figure 2A The manner shown penetrates at least partially into the base 34A and into the second nonwoven web 38.

[0192] For example, it can be used as follows Figure 20 The apparatus 100 shown manufactures anti-slip strips 34. Apparatus 100 allows for the manufacture of anti-slip strips 34 for laminated assemblies 30. The anti-slip strip 34 includes a continuous base 34A and a plurality of protruding elements 34B. Figure 20 In one embodiment, each protruding element 34B includes a rod 48 topped with a head 50. The head 50 is disposed at the end of the protruding element 34B opposite to the base 34A, particularly at the upper surface 34AA of the base 34A.

[0193] The device 100 shown includes a molding strip 102 located on a rotary drive 104, which includes two rollers 104A and 104B, and a material dispensing device 106 (e.g., an syringe) adapted to perform injection molding of elastic molding materials.

[0194] Therefore, the components formed by the forming strip 102 and the rotary drive device 104 constitute a forming device.

[0195] The illustrated example including two rollers 104A and 104B is not exhaustive; the number and arrangement of rollers can be varied to suit the length of the forming strip 102 and different positions of the equipment. For example, three rollers can be used, or even a single roller can be used, such that the forming strip is arranged around the periphery of the single roller, for example, forming a sleeve. In particular, only one of the two rollers can be driven to rotate by an electric device, such as roller 104A, while the other roller 104B is free, i.e., without an electric device, and is driven by the rotation of the forming strip, itself driven by roller 104A. The direction of travel of the forming strip defines the direction MD of the anti-slip strip.

[0196] The forming strip 102 shown includes an inner surface 102A and an outer surface 102B, with the inner surface 102A in contact with the rotary drive device 104.

[0197] The material dispensing device 106 is arranged to inject molding material onto the outer surface 102B of the molding strip 102.

[0198] Specifically, the material dispensing device 106 is arranged opposite to and spaced apart from the forming strip 102 to limit... Figure 20 The air gap e shown in the figure, wherein the boundary of the material injected into the outer surface 102B of the molding strip 102 is marked by reference numeral A, corresponding to the trailing edge of the material injected into the molding strip 102 relative to the traveling direction of the molding strip 102.

[0199] The molding strip 102 is provided with multiple cavities 102C, thereby allowing the protruding element 34B of the anti-slip strip 34 to be realized.

[0200] The cavities 102C are all formed to define: a rod 102C1 extending from the outer surface 102B of the forming strip 102 to the inner surface 102A; and a head 102C2 extending between the rod 102C1 and the inner surface 102A of the forming strip 102.

[0201] In the example shown, the head 50 of the cavity 102C opens onto the inner surface 102A of the forming strip 102. Therefore, the cavity 102C is through. The cavity 102C can also be a blind hole, i.e., the cavity does not open from the inner surface 102A of the forming strip 102, and / or the cavity 102C may have only one stud or pin.

[0202] The portion of the cavity 102C forming rod 102C1 generally extends in a direction perpendicular to the outer surface 102B of the forming strip 102. The portion of the cavity 102C forming rod 102C1 generally has a rotational geometry about an axis perpendicular to the outer surface 102B of the forming strip 102, or a geometry of a plane of symmetry extending in a direction parallel to the travel direction of the forming strip 102 and / or in a direction perpendicular to the travel direction of the forming strip 102.

[0203] The portion of the cavity 102C forming the head 102C2 typically extends radially or laterally relative to an axis perpendicular to the outer surface 102B of the forming strip 102, and may be rotationally symmetrical about this axis perpendicular to the outer surface 102B of the forming strip 102. The portion of the cavity 102C forming the head 102C2 typically has a substantially truncated pyramidal or hexahedral shape.

[0204] The portion of the cavity 102C that forms the head 102C2 can be linear or curved, for example, to form a curved portion toward the inner surface 102A of the forming strip 102 or toward the outer surface 102B of the forming strip, the curved portion extending from the portion of the cavity 102C that forms the rod 102C1.

[0205] The portion of cavity 102C that forms head 102C2 can have a constant or variable thickness.

[0206] In the example shown in the attached figure, the portion of the cavity 102C forming the head 102C2 extends radially around the portion of the cavity 102C forming the rod 102C1, and is generally disc-shaped.

[0207] The forming strip 102 may have a specific texture, such as grooves, groove patterns, or vent or pin patterns, on its inner surface 102A or its outer surface 102B, or it may be substantially smooth, as described in application WO2017187103, which is incorporated herein by reference.

[0208] The forming strip 102 can be formed by stacking multiple strips, so it is not necessarily a single piece or a single material.

[0209] The material dispensing device 106 is typically arranged to perform the injection of molding material into the molding strip 102 at a portion of the molding strip 102, wherein the molding strip is supported on a drive roller, in this case, supported on... Figure 20 and / or Figure 21 The example shown is on drive roller 104A. The drive roller then forms the bottom of cavity 102C.

[0210] When the molding strip 102 is not supported on the drive roller while the molding material is being injected, the material dispensing device 106 may include a base provided on the other side of the molding strip 102, such that when the material is being injected, the inner surface 102A of the molding strip 102 is supported on the base, and the base forms the bottom of the cavity 102C of the molding strip 102.

[0211] The combined use of the forming strip 102 and the drive device 104 is advantageous for several reasons compared to conventional forming devices (such as rollers) in which forming cavities are directly formed.

[0212] In terms of modularity, the use of the forming strip 102 is particularly interesting. In fact, the forming strip can be easily removed and replaced from the drive unit, unlike large rollers where disassembly and reassembly are particularly complex. This advantage is especially evident when the two rollers 104A, 104B are fixed to the frame on the same side, allowing the forming strip to be freely introduced / removed from the other end. A device for guiding the forming strip can also be used to facilitate its insertion and / or removal. The guiding device may include a tensioning element for the forming strip.

[0213] Furthermore, the manufacture of forming strips is significantly simpler compared to the manufacture of rollers with forming cavities. In practice, such rollers are typically made by stacking continuous sheets, which requires multiple machining operations and results in significant limitations during assembly and each change in the reference of the protruding element. Their large mass also necessitates holding these rollers at both ends, thus complicating their replacement.

[0214] Where it is desired to form the protruding element 34B, the cavity 102C in the forming strip 102 can be fabricated by an etching process or by using a laser. It is also conceivable to fabricate a forming strip 102 having cavities 102C uniformly distributed throughout the entire forming strip 102, and then filling the cavities 102C in the region 20 where it is desired to form without the protrusion 34B. The forming strip can be made, for example, of nickel, stainless steel, or non-stainless steel.

[0215] The separation between the anti-slip strip 34 and the molding strip 102 is indicated by reference numeral C in the attached drawing. Figure 20 The markings, such as the position where the base 34A of the anti-slip strip 34 no longer contacts the forming strip 102, are used. It can be assumed that the forming strip 102 is loaded onto the release roller 108, that is, the release roller 106 forms a lever in the forming strip 102 to facilitate the release of the protruding element from the mold.

[0216] In the example shown, the cavity 102C of the molding strip 102 is through-hole. The apparatus may include elements such as a scraper 110 positioned to scrape the inner surface 102A of the molding strip 102 to remove excess molding material if necessary. Injection molding refers to the action of shaping molten material, such as dispensing, feeding, molding, injection, and extrusion.

[0217] The anti-slip strip 34 can therefore be formed by dispensing elastomeric material into the cavity 102C of the molding strip 102 by the material dispensing device 106 and abutting against the outer surface 102B of the molding strip 102. Figure 20 The forming strip 102 has cavities 102C, each cavity being formed to define: a rod 102C1 extending from the outer surface 102B of the forming strip 102 to the inner surface 102A; and a head 102C2 extending between the rod 102C1 and the inner surface 102A of the forming strip 102. The forming strip 102 may include cavities 102 that do not have cavities defining the head 102C2. The cavities 102C of the forming strip 102 may also be non-through cavities and therefore not open to the inner surface 102A of the forming strip 102.

[0218] exist Figure 28 The image shows protruding elements, each comprising a rod topped with a head. These protruding elements are formed by a forming device 120 comprising a drive roller 122 and a forming roller 124. Figures 20 to 23 The protruding element shown is obtained by rolling.

[0219] When a symmetrical and flat head 50 is desired, the drive roller 122 and the forming roller 124 operate at the same speed.

[0220] When forming the symmetrical head 50, the speeds of the drive roller 122 and the forming roller 124 are different. In particular, the following ratio V122 / V124 = A can be used, where A is greater than or equal to 0.4, preferably greater than or equal to 0.65, and less than or equal to 1.6, preferably less than or equal to 1.35.

[0221] exist Figure 8 An example of the anti-slip strip 34 is shown in AF. It can be seen that not all protruding elements 34B have a uniform height H34B and can have different widths L34BB (see, in particular). Figure 8 (Example of E). It can also be seen that the protruding element 34B typically forms an anti-slip strip pattern 44, which repeats along the longitudinal direction X (see embodiment). Figure 8 (AF). The anti-slip strip pattern extends over the entire width L34A of the base 34A of the anti-slip strip 34 (i.e., the dimension of the anti-slip strip along the lateral direction Y or direction CD). However, as Figure 8As shown in F, the anti-slip strip 34 may also not have a repeating pattern and may be formed by a single anti-slip strip pattern. The protruding element 34B may form an anti-slip strip pattern 44 with a closed contour 44A. The protruding element 34B may have different densities along the longitudinal direction X and the lateral direction Y and / or along the longitudinal direction X and / or the lateral direction Y.

[0222] Then, the support layer 32 can be bonded to the anti-slip strip 34 by adhesive, ultrasonic welding and / or by melting the base 34A or the support layer 32.

[0223] The equipment and associated processes described above may also include means and steps for assembling the support layer 32 to the base 34A.

[0224] In order to perform the assembly of the support layer 32 to the base 34A of the anti-slip strip 34, the proposed device 100 may include means for driving the support layer 32, the means being adapted to perform belt feeding and abutting the support layer 32 against the lower side 34AB of the base 12 downstream of the material dispensing device 106.

[0225] Figure 21 and Figure 22 An example of a device 100 including such a device is shown schematically. Figure 22 yes Figure 21 Detailed view of area XXII.

[0226] The device shown is similar to the previous reference. Figure 20 The equipment shown is shown; therefore, the common components will not be described again here.

[0227] like Figure 21 and Figure 22 As can be seen, the device includes a web driving device 112, which consists of two rollers 112A and 112B, configured to supply the support layer 32 downstream of the material dispensing device 106. In this embodiment, the direction MD of the anti-slip strip 34 merges with the direction MD of the support layer 32.

[0228] The support layer 32 is typically a nonwoven material layer, a thermoplastic film, an elastic film or a composite film, or a component of thermally bonded fibers and / or filaments.

[0229] exist Figure 21 and Figure 22 In the example shown, support layer 32 is shown as a nonwoven web.

[0230] The drive device 112 of the support layer 32 is configured to supply the support layer 32 to the device and apply the support layer 32 to the lower surface 34AB of the base 34 downstream of the material dispensing device 106.

[0231] The drive device 112 is configured to perform the application before the base 34A is fully cured. Therefore, the application causes the support layer 32 to penetrate at least partially into the plane defined by the lower surface 34AB of the base 34. The contact point between the base 34A and the support layer 32 is marked with reference numeral B in the figure.

[0232] More precisely, the lower surface 34AB of the base 34 is substantially flat and defines a plane. Applying the support layer 32 to this lower surface 34AB causes a portion of the support layer 32 (e.g., in the case of a nonwoven web, the fibers and / or filaments of the nonwoven web) to penetrate into the base 34A, thereby penetrating the lower surface 34AB of the base 34A.

[0233] Since this application is performed before the base 34A is fully cured, there is no need to heat the base 34A and / or the support layer 32 to achieve this adhesion.

[0234] For example, consider a base 34A made of VISTAMAXX 7050 FLX (available from ExxonMobil Chemical, Houston, Tex.). Typically, the substrate is applied to the lower surface 34AB of the base 34A when the temperature of the lower surface 34AB is between the melting temperature of the material and the softening temperature (Vicat B) of the constituent material minus 30°C, or between the melting temperature of the constituent material and the softening temperature (Vicat A) of the constituent material. More specifically, when the base comprises a polyolefin-based material, the lower surface 34AB of the base 34A has a temperature between 150°C and 200°C, typically on the order of 175°C, which is typically measured by infrared or laser cameras. The VICAT softening temperature is defined as the temperature obtained according to one of the methods described in standard ISO 306 or ASTM D1525, with a heating rate of 50°C / h, a standard load of 50 N for VICAT B, and a standard load of 10 N for VICAT A.

[0235] The support layer 32 can be applied uniformly or non-uniformly to the lower surface 34AB of the base 34A.

[0236] The bond between the support layer 32 and the base 34A can be uniform or non-uniform.

[0237] When the support layer 32 is a thermo-bonded assembly of fibers and / or filaments, the bonding with the base 34A is achieved by penetrating the fibers and / or filaments of the support layer 32 into the base 34A.

[0238] If the support layer 32 is a nonwoven web, the protruding element can be easily removed from the mold even when using a nonwoven fabric with a weight of less than 80 g / m² (the material mass of the nonwoven fabric, expressed in grams per square meter). For example, the weight of the nonwoven fabric can be between 5 g / m² and 120 g / m², or between 25 g / m² and 100 g / m², or between 10 g / m² and 70 g / m².

[0239] This method of joining the support layer 32 to the base 34A, which includes the protruding element 34B, is particularly advantageous because it does not cause deformation of the base 34A. Therefore, it is advantageous to maintain the shape of the base 34A obtained during the injection molding step, especially to maintain the straight edges that can be obtained by the above-described method and equipment.

[0240] When the support layer 32 is a nonwoven web, the device may include a calendering device upstream of the drive unit 112, thereby enabling partial calendering or calendering of the nonwoven web to be performed before it is applied to the base 34A.

[0241] Figure 21 and Figure 22 The device 100 can be used to laminate anti-slip strips 34 and support layers 32, wherein the support layer 32 may include one or more nonwoven webs having or not having thermoplastic films (elastic or inelastic), such as... Figure 2A Take the support layer 32 in the example.

[0242] Figure 21 and Figure 22 The device 100 can also be used to attach the anti-slip strip 34 to Figure 2A The second nonwoven web 38, and then the second nonwoven web 38 and the anti-slip strip 34 are joined together. Figure 2A The elastic membrane 40 and the first nonwoven web 36.

[0243] Figure 3 Implementation examples and Figure 2A The difference in the embodiment is that the anti-slip strip 34 passes through the second nonwoven web 38, wherein the protruding element 34B protrudes from the upper surface 30A of the laminate assembly 30.

[0244] In this embodiment, an anti-slip strip 34 is formed by distributing elastomeric material through the second nonwoven web 38 into the cavity 102C of the forming strip 102. For Figure 23 The device, device 100, includes a drive unit 114 configured to supply a second nonwoven web 38 upstream of a material dispensing device 106. Anti-slip strips 34 are injected through the second nonwoven web 38, causing multiple portions of the second nonwoven web 38 to penetrate into a base 34A. Figure 23For simplicity, the thickness of the second nonwoven web 38 is shown to be less than the thickness of the first nonwoven web 36. Depending on the application, the thicknesses of the first nonwoven web 36 and the second nonwoven web 38 may be similar or different.

[0245] Since this application is performed before the base 34A is fully cured, it is not necessary to heat the base 34A and / or the support layer 32 to achieve this bonding.

[0246] Then the second nonwoven web 38 and the anti-slip strip 34 are joined together. Figure 3 The elastic membrane 40 and the first nonwoven web 36 are used. The base material and the elastic membrane material may be the same or different, but they are still elastomer materials.

[0247] exist Figure 4 In this embodiment, the elastic membrane 40 is made of an elastomeric material. The elastomeric material of the elastic membrane is, for example, the same as that of the anti-slip strip, and the first nonwoven web 36 and the second nonwoven web 3 are laminated to the elastic membrane 40 without the addition of an adhesive.

[0248] Typically, before the elastic membrane 40 is fully cured, the first nonwoven web 38 and the second nonwoven web 38 can be bonded to the elastic membrane 40 by applying the first nonwoven web 38 to the lower surface 34AB of the base 34A and applying the second nonwoven web 36 to the upper surface 34AA of the base 34A, thereby causing portions of the first nonwoven web 36 and the second nonwoven web 38 to penetrate into the base 34A.

[0249] Since this application is performed before the base 34A is fully cured, it is not necessary to heat the base 34A and / or the support layer 32 to achieve this bonding. The material of the base and the material of the elastic membrane may be the same or different, but are still elastomeric materials. According to an alternative embodiment not shown, the first nonwoven web may be bonded via an adhesive layer (continuously and / or in the form of adhesive threads, e.g., as shown in the image). Figure 3 (As shown) is bonded to the elastic membrane.

[0250] Figure 23 The device 100 includes drive units 112 and 114, which are respectively configured to supply a first nonwoven web 36 downstream of the material distribution device 106 and supply a second nonwoven web 38 upstream of the material distribution device 106.

[0251] When the elastomer material of the anti-slip strip 34 is different from the elastomer material of the elastic film 40, or when the film 40 is a non-elastic thermoplastic film, Figure 23 The equipment includes a second material dispensing device arranged downstream of the material dispensing device 106.

[0252] exist Figure 5 In one embodiment, the second nonwoven web 38 is assembled by bonding it to the elastic membrane 40 using adhesive 42. The second nonwoven web 38 is divided into two parts, each disposed on either side of the anti-slip strip 34. The material of the base and the material of the elastic membrane may be the same or different, but are still elastomeric materials. According to an alternative embodiment not shown, the first nonwoven web may be connected via an adhesive layer (continuously and / or in the form of adhesive threads, e.g.) Figure 3 (As shown) is bonded to the elastic membrane.

[0253] In Figure 2 to Figure 4 In one embodiment, the anti-slip strip is arranged in the middle along the lateral direction Y of the support layer 32. Figure 5 In one embodiment, the anti-slip strip is not centered.

[0254] like Figures 24A-24B As shown, the anti-slip strip 34 can be placed at different positions on the support layer 32. The anti-slip strip can be placed... Figures 24A-24C Any position between the positions shown. Figures 24A-24C In this context, the dimension of the anti-slip strip 34 along the direction MD is larger than the dimension along the direction CD. It is understood that the anti-slip strip has a length along the direction MD and a width along the direction CD.

[0255] Figures 20 to 23 The forming strip 102 has cavities 102C, each cavity being formed to define: a rod 102C1 extending from an outer surface 102B of the forming strip 102 to an inner surface 102A; and a head 102C2 extending between the rod 102C1 and the inner surface 102A of the forming strip 102. The forming strip 102 may include cavities 102 that do not have cavities defining the head 102C2. The cavities 102C of the forming strip 102 may also be non-penetrating cavities and therefore not open to the inner surface 102A of the forming strip 102.

[0256] Figures 9 to 19 The molded strip 102 with various patterns for forming the anti-slip strip 34 is shown.

[0257] Figure 9 This is a partial view of the forming strip 102, the width L102 of which is greater than the width L34B of the protruding element pattern 34B in the lateral direction Y. The forming strip 102 can be seen from the outer surface 102B. Figure 10 It is based on Figure 9 A cross-sectional view of section XX. Figure 11 yes Figure 10 The enlarged view at XI shows the molding cavity 102C of the molding strip 102. Figure 12 yes Figure 9 The enlarged view shows the cavity 102C of the forming strip 102. Note that in Figure 9In this embodiment, the perforated portion of the molding strip 102 is not centered relative to the axis of symmetry A of the molding strip 102. The perforated portion of the molding strip 102 corresponding to the width L34B of the protruding element 34B on the base 34A of the anti-slip strip 34 can be centered on the axis of symmetry A, or even offset to... Figure 9 The left or right side.

[0258] For example, by using Figures 9 to 12 The anti-slip strip 34, obtained by distributing elastomeric material onto the molding strip 102, has a width L34A of 20 mm measured in the lateral direction Y. Taking the entire width L34A of the anti-slip strip as an example, the 22.52 mm² area includes 49 protruding elements 34B, i.e., a density of 217.616 protruding elements per cm², accounting for 13.40% of the total area of ​​the base 34A.

[0259] Figure 13 It is similar to Figure 12 The view of the forming strip 102 in the view, Figure 14 This is a cross-sectional view along plane XIV, similar to that for... Figure 13 The pattern in Figure 11 The view in the middle. Figure 13 The image shows a "flower" pattern in the cavity 102C of the molding strip 102. (Example:) Figure 14 As shown, cavity 102 can have an angle, which in this case is 10° or less. This facilitates the removal of protruding parts from the mold.

[0260] For example, by using Figure 13 and Figure 14 The anti-slip strip 34, obtained by distributing elastomeric material onto the molding strip 102, has a width L34A of 20 mm measured in the lateral direction Y. Taking the entire width L34A of the anti-slip strip as an example, the 130 mm² area includes 30 protruding elements 34B, i.e., a density of 23.077 protruding elements per cm², accounting for 29.05% of the total area of ​​the base 34A.

[0261] Figures 15 to 19 Is with Figure 12 A similar view to the one in the image shows other patterns formed by the cavities 102C of the molding strip 102. For Figure 18 Regarding the patterns in the text, Figure 19 The view is similar to Figure 14 The view in the figure shows that cavity 102C is not continuous and does not have a uniform depth. Cavity 102C has three different heights: H102C1, H102C2, and H102C3.

[0262] For example, by using Figure 15The anti-slip strip 34 obtained by distributing elastomeric material in the molding strip 102 is an anti-slip strip with a width L34A of 20 mm measured in the lateral direction Y. Taking the entire width L34A of the anti-slip strip as an example, the 110 mm² area includes 11 protruding elements 34B, that is, a density of 10 protruding elements per cm², accounting for 25.15% of the total area of ​​the base 34A.

[0263] For example, by using Figure 16 The anti-slip strip 34, obtained by distributing elastomeric material onto the molding strip 102, has a width L34A of 20 mm measured in the lateral direction Y. Taking the entire width L34A of the anti-slip strip as an example, the 382.78 mm² area includes 225 protruding elements 34B, i.e., a density of 58.78 protruding elements per cm², accounting for 8.11% of the total area of ​​the base 34A.

[0264] For example, by using Figure 17 The anti-slip strip 34, obtained by distributing elastomeric material onto the molding strip 102, has a width L34A of 20 mm measured in the lateral direction Y. Taking the entire width L34A of the anti-slip strip as an example, the 251.66 mm² area includes 405 protruding elements 34B, i.e., a density of 160.93 protruding elements per cm², accounting for 9.91% of the total area of ​​the base 34A.

[0265] For example, by using Figure 18 The anti-slip strip 34, obtained by distributing elastomeric material onto the molding strip 102, has a width L34A of 20 mm measured in the lateral direction Y. Taking the entire width L34A of the anti-slip strip as an example, the 187.35 mm² area includes 35 protruding elements 34B, i.e., a density of 18.682 protruding elements per cm², accounting for 25.22% of the total area of ​​the base 34A.

[0266] like Figure 29 As shown, the anti-slip strip 34 is obtained by injection molding an elastomer material into the molding strip 102, so the anti-slip strip 34 extends along... Figure 29 It extends in the vertical direction X. Still... Figure 29 The lateral direction Y is shown. Here, the longitudinal direction X is parallel to the processing direction MD, that is, the direction of travel of the anti-slip strip 34.

[0267] The anti-slip strip 34 is defined by two edges B, each edge extending along the longitudinal direction X, and the two edges B define the two ends of the base 34A of the anti-slip strip 34 along the lateral direction Y orthogonal to the longitudinal direction X.

[0268] The protruding elements are typically arranged close to edge B; for example, the distance D from edge B is included between two and three pitches P of the protruding element, usually equal to two or three pitches P, measured in the lateral direction Y relative to the longitudinal direction X. The pitch P between two protruding elements corresponds to the distance between two consecutive protruding elements in the longitudinal direction. Figure 29 In the example shown, the protruding elements are arranged in columns along the longitudinal direction X, and these columns are repeated identically along the lateral direction Y. The protruding elements can be arranged in an interlaced or "honeycomb" configuration, for example, by shifting the protruding elements along the longitudinal direction.

[0269] like Figure 29 As shown, each edge B has a series of peaks and valleys that extend along the longitudinal direction L and the peaks and valleys extend along a plane parallel to the plane formed by the base 34A of the anti-slip strip 34. The peaks and valleys reflect slight irregularities in the distribution of the molding material used to form the anti-slip strip 34. It should be understood that perfectly straight edges are not industrially feasible.

[0270] Valleys are understood as the areas of edge B that protrude inward from anti-slip strip 34, while peaks are understood as the areas of edge B that protrude outward from anti-slip strip 34.

[0271] Therefore, the regularity of edge B can be assessed by using these continuous peaks and valleys.

[0272] When viewed in a cross-section transverse to longitudinal direction, edge B has a circular shape. Specifically, the circular shape is oriented laterally outwards towards the base 34A. This circular shape is produced when the base 34A is formed. In other words, this circular shape is not obtained through cutting.

[0273] The above-described apparatus and method enable the edge B of the anti-slip strip 34 to be obtained such that, for a length L in the longitudinal direction L corresponding to three consecutive peaks, the maximum distance E between the peaks and valleys in the lateral direction Y, which is orthogonal to the longitudinal direction X, is less than 3 mm, or more precisely less than 2 mm, or more precisely less than 1 mm, or is included between 0.001 mm and 1 mm, more particularly between 0.001 mm and 0.5 mm, and more particularly between 0.001 mm and 0.1 mm.

[0274] This definition also applies to the lengths corresponding to three consecutive valleys; the maximum distance between the peak and valley along the lateral direction Y is less than 3 mm, or more precisely less than 2 mm, or more precisely less than 1 mm, or included between 0.001 mm and 1 mm, more particularly between 0.001 mm and 0.5 mm, and more particularly between 0.001 mm and 0.1 mm.

[0275] The three consecutive peaks or valleys are typically less than the distance corresponding to the 15 steps P of the protruding element, more preferably less than 25 mm.

[0276] Obtaining a “straight” edge B is advantageous because it eliminates the need for subsequent steps to straighten the edge (such as a cutting step), since such a straight edge is seen by users as a sign of product quality.

[0277] Furthermore, the equipment and methods used make it possible to obtain such straight edges without having additional thickness at the edge of the strip, since such additional thickness is irrelevant to the function.

[0278] As can be understood from the above description, straight edges are obtained by injection molding material via the material dispensing device 106. As mentioned above, subsequent demolding and molding steps maintain these straight edges, provided that these steps do not result in force being applied to the edge of the base 34A of the anti-slip strip 34. The anti-slip strip 34 obtained at the end of these individual steps thus has straight edges as defined above.

[0279] To measure the static friction coefficient, residual deformation, and elongation at break, the measurement samples were prepared in a similar manner and according to the method described below.

[0280] Condition the laminated assembly for 24 hours in a normal atmosphere as defined in ASTM D5170, at a temperature of 23°C ± 2°C and a relative humidity of 50% ± 5%.

[0281] According to ASTM D1894, the static coefficient of friction is measured by moving a 200g pad with an area of ​​63mm × 63mm across the surface of the anti-slip strip at a speed of 150mm / min.

[0282] In the first part of the test, samples of the laminated assembly were attached to the friction stage of the test system in an absolutely flat state using adhesive tape. The types of tapes that can be used to adhere material samples to the friction stage are well known to those skilled in the art and therefore will not be described in further detail in this document.

[0283] In another part of the test, a front ear made of spunbond nonwoven fabric (60 gsm PP) of the brand ULTRATEX D1A 60 X, available from TEXBOND nonwovens, was placed on the lower surface of the pad facing the upper surface of the laminated assembly sample, with the calendered surface of the spunbond facing the upper surface of the laminated assembly sample. The pad was translated across the sample to be tested over a length of at least 15 mm to obtain the value of the static friction coefficient.

[0284] To measure the static friction coefficient at 15% elongation, a sample of the laminated assembly 30 was held at 15% elongation of the anti-slip strip 34 using a double-sided adhesive. The measurement method was the same as that used for measuring the static friction coefficient in a stationary state.

[0285] For samples of laminated components that do not have anti-slip strips, such as those available from the company "APLIX", the following are examples: High Stretch Surefit 100 The laminated assembly sold under the name "FM27R0140N010-AS02N" has a static friction coefficient of 0.37 along direction MD and 0.42 along direction CD when at rest.

[0286] For including High Stretch Surefit 100 support layer and by means of Figure 9 The antislip strip laminated assembly obtained by the molding strip 102 has a static friction coefficient of 0.53 along direction MD and 0.88 along direction CD in a static state. When the sample is stretched by 15% along direction CD, its static friction coefficient is 0.73 along direction MD and 0.99 along direction CD.

[0287] For including High Stretch Surefit 100 support layer and by means of Figure 13 The antislip strip laminated assembly obtained by the molding strip 102 has a static friction coefficient of 0.71 along direction MD and 1.06 along direction CD in a static state. When the sample is stretched by 15% along direction CD, its static friction coefficient is 0.57 along direction MD and 1.07 along direction CD.

[0288] For including High Stretch Surefit 100 support layer and by means of Figure 15 The antislip strip laminated assembly obtained by the molding strip 102 has a static friction coefficient of 0.54 along direction MD and 0.72 along direction CD in a static state. When the sample is stretched by 15% along direction CD, its static friction coefficient is 0.79 along direction MD and 0.84 along direction CD.

[0289] To measure residual deformation and elongation at break, the measuring equipment is a force gauge according to EN 10002, such as the Synergy 200H, 1 column, available from MTS Systems Corp. with TESTWORKS 4.04B user software.

[0290] Cut sample 52 into the desired shape using a cutter or scissors. See Figure 25 Sample 52 has an overall shape of an isosceles trapezoid.

[0291] The anti-slip strip 34 has a length and a width. When the length of the anti-slip strip is parallel to direction MD, sample 52 has a dimension of 80 mm along direction CD. The isosceles trapezoidal small and large bases are parallel to direction MD and are measured to be 50 mm and 84 mm respectively. Figure 25 As shown.

[0292] Each edge of sample 52 is reinforced by attaching a reinforcing member to the sample with double-sided adhesive. Each reinforced edge of sample 52 is then placed in the grippers 202, 204 of force gauge 200 (see...). Figure 26 Before the test, the distance between the two grippers 202 and 204 was 40mm.

[0293] The elongation at break test is performed with grippers 202 and 204 moving at a constant speed relative to each other. Typically, one gripper is fixed, in this case, the lower gripper 204, and the other gripper is movable, in this case, the upper gripper 202. To perform the elongation at break test, the movable gripper moves at a constant speed of 508 mm / min until an interruption is detected.

[0294] The elongation at break test gives an elongation at break of 10 N (Newtons), which is expressed as a percentage of the initial size of sample 52 or in mm. The breaking force is expressed in N.

[0295] The elongation at break test curve is shown in Figure 27 In. Figure 27 In the graph, the x-axis represents the elongation as a percentage of the original size of sample 52, and the y-axis represents the force in N. Curve 1 represents the elongation at break test of the laminated assembly including the anti-slip strip, and curve 2 represents the elongation at break test of the support layer of the laminated assembly of curve 1 (i.e., the laminated assembly without the anti-slip strip). It can be seen that the elongation at break of curves 1 and 2 are basically similar. On the other hand, when the support layer includes the anti-slip strip, the force required for sample 52 to reach break is greater. For any elongation before the maximum force, the laminated assembly including the anti-slip strip obtains a greater force than the laminated assembly without the anti-slip strip.

[0296] Residual deformation tests were performed on the same equipment using samples of the same type as those used in the elongation at break test (sample 52).

[0297] The moving jaws operate at a constant speed of 508 mm / min, with an initial jaw distance of 40 mm, and stretch the sample until a force of 10 N is reached. Once the force of 10 N is reached, the movement of the moving jaws stops, and the gap is maintained for 30 seconds. The jaws then move to their starting position at a constant speed and hold the sample 52 in that position for 60 seconds.

[0298] The result is a curve that gives the tensile force, expressed in N, as a function of the elongation, expressed as a percentage of the initial sample size. This curve has a hysteresis condition, and the residual deformation, or SET deformation, at the end of the cycle is determined as follows: SET = the intersection of the movable jaw with the x-axis of the curve, measured during the movement of the movable jaw when the movable jaw returns to its starting position (i.e., the jaw spacing is 40 mm).

[0299] Although this disclosure has been described with reference to specific exemplary embodiments, it will be apparent that various modifications and changes can be made to these embodiments without departing from the overall scope of the invention as defined by the claims. Furthermore, various features of the different embodiments mentioned may be combined in other embodiments. Therefore, the specification and drawings should be considered in an illustrative rather than restrictive sense. For example, the anti-slip strip may have a direction MD that is not parallel to the direction MD of the support layer. Figures 2A to 8 F, Figures 20 to 25 and Figure 28 Alternative embodiments of the embodiments may have according to Figures 20 to 23 The top is covered with head pins and / or pins and / or rods and / or according to Figure 28 The top is covered with a rod with a head.

Claims

1. A laminated assembly (30) comprising a support layer (32) and an anti-slip strip (34), the anti-slip strip (34) comprising an elastomeric material, the support layer (32) and the anti-slip strip (34) being laminated together, the anti-slip strip (34) comprising a base (34A) and a plurality of protruding elements (34B) extending from the base (34A), the plurality of protruding elements (34B) protruding from a surface (30A) of the laminated assembly (30), the protruding elements preventing the anti-slip strip from engaging and hooking with another surface, the support layer (32) comprising a nonwoven web (36, 38) having a weight between 5 g / m² and 70 g / m², wherein, The protruding element (34B) forms an anti-slip strip pattern (44) on the anti-slip strip (34), and the sum of the areas defined by the orthogonal projections of the protruding element (34B) on the base (34A) on the base (34A) is greater than or equal to 1% of the total area of ​​the base of the anti-slip strip pattern (44) and less than or equal to 40% of the total area of ​​the base of the anti-slip strip pattern (44).

2. The laminated assembly (30) according to claim 1, wherein, The support layer (32) includes a thermoplastic film.

3. The laminated assembly (30) according to claim 2, wherein, The thermoplastic film is an elastic film (40).

4. The laminated assembly (30) according to claim 3, wherein, The base (34A) of the anti-slip strip (34) and the elastic membrane (40) both have a width, the width (L34A) of the base (34A) is smaller than the width (L40) of the elastic membrane (40), preferably, the width of the base is greater than or equal to 10% of the width of the elastic membrane and less than or equal to 60% of the width of the elastic membrane.

5. The laminated assembly (30) according to claim 3, wherein, The support layer (32) includes a first nonwoven web (36), a second nonwoven web (38) and the elastic membrane (40), the elastic membrane (40) being laminated between the first nonwoven web (36) and the second nonwoven web (38).

6. The laminated assembly (30) according to claim 1, wherein, In a stationary state, in the area including the protruding element (34B), the anti-slip strip (34) has a static friction coefficient measured according to standard ASTM D1894, which is greater than or equal to 0.1 along the direction MD and / or the direction CD, preferably greater than or equal to 0.5, even more preferably greater than or equal to 0.8, and less than or equal to 10, preferably less than or equal to 5, even more preferably less than or equal to 3.

7. The laminated assembly (30) according to claim 1, wherein, The anti-slip strip (34) has a static friction coefficient measured according to standard ASTM D1894, and the static friction coefficient is included between 50% and 150% of the static friction coefficient in the static state when the anti-slip strip (34) is stretched to 15% of the static value.

8. The laminated assembly (30) according to claim 1, wherein, In a static state, the protrusion density of the plurality of protrusion elements (34B) is greater than or equal to 3 protrusion elements per cm², preferably greater than or equal to 10 protrusion elements per cm², and less than or equal to 400 protrusion elements per cm², preferably less than or equal to 300 protrusion elements per cm².

9. The laminated assembly (30) according to claim 1, wherein, In a stationary state, the plurality of protruding elements (34B) have a pattern, the pattern including a repeating anti-slip strip pattern (44).

10. The laminated assembly (30) according to claim 1, wherein, The sum of the areas defined by the orthogonal projections of the protruding elements (34B) on the base (34A) on the base (34A) is greater than or equal to 5% of the total area of ​​the base of the anti-slip strip pattern (44) and less than or equal to 35% of the total area of ​​the base of the anti-slip strip pattern (44).

11. The laminated assembly (30) according to claim 1, wherein, The thickness (E34A) of the base (34A) is greater than or equal to 10µm, preferably greater than or equal to 15µm, and less than or equal to 200µm, preferably less than or equal to 150µm.

12. The laminated assembly (30) according to claim 1, wherein, The protruding element (34A) is a pin and / or a stud and / or a rod, each rod having a head disposed at one end of the rod opposite the base.

13. An absorbent article, such as a disposable diaper, comprising a laminated component according to any one of the preceding claims.

14. A method for manufacturing a laminated assembly (30), the method comprising the steps of: -An anti-slip strip (34) is formed by dispensing elastomeric material in a molding device (100), the anti-slip strip including a base (34A) and a plurality of protruding elements (34B) extending from the base (34A). - The support layer (32) and the anti-slip strip (34) are assembled by laminating the support layer (32) and the anti-slip strip (34). The support layer (32) includes a nonwoven web (36, 38) with a weight between 5 g / m² and 70 g / m². The protruding elements (34B) form an anti-slip strip pattern (44) on the anti-slip strip (34). The sum of the areas defined by the orthogonal projections of the protruding elements (34B) on the base (34A) is greater than or equal to 1% and less than or equal to 40% of the total area of ​​the base of the anti-slip strip pattern (44).

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