Search

CN-122005218-A - Laminate assembly, diaper comprising such an assembly and method for manufacturing such an assembly

CN122005218ACN 122005218 ACN122005218 ACN 122005218ACN-122005218-A

Abstract

The present invention relates to a laminate assembly comprising a support layer (32) and a slip strip (34), the slip strip (34) comprising an elastomeric material, the support layer (32) and slip strip (34) being laminated together, the 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.

Inventors

  • Pierre Yves Francois Jean lino

Assignees

  • 埃普利克斯公司

Dates

Publication Date
20260512
Application Date
20190320
Priority Date
20180321

Claims (14)

  1. 1. A lamination assembly (30) comprising a support layer (32) and a cleat (34), the cleat (34) comprising an elastomeric material, the support layer (32) and the cleat (34) being laminated together, the cleat (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 lamination assembly (30), the protruding elements not allowing the cleat to engage and hook with another surface, the support layer (32) comprising a nonwoven web (36, 38), the nonwoven web (36, 38) having a weight between 5g/m2 and 70g/m2, wherein the protruding elements (34B) form a cleat pattern (44) on the cleat (34), the total cleat area (44) of the cleat pattern defined by the orthogonal projection of protruding elements (34B) on the base (34A) being equal to or greater than or equal to the sum of the total cleat area (44) of the base pattern (44) of greater than or equal to 1%.
  2. 2. The laminate assembly (30) of claim 1, wherein the support layer (32) comprises a thermoplastic film.
  3. 3. The laminate assembly (30) of claim 2, wherein the thermoplastic film is an elastic film (40).
  4. 4. A laminate assembly (30) according to claim 3, wherein the base (34A) and the elastic membrane (40) of the cleat (34) each have a width, the width (L34A) of the base (34A) being smaller than the width (L40) of the elastic membrane (40), preferably the width of the base being greater than or equal to 10% and less than or equal to 60% of the width of the elastic membrane.
  5. 5. A laminate assembly (30) according to claim 3, wherein the support layer (32) comprises a first nonwoven web (36), a second nonwoven web (38) and the elastic film (40), the elastic film (40) being laminated between the first nonwoven web (36) and the second nonwoven web (38).
  6. 6. The laminate assembly (30) according to claim 1, wherein in a resting state, in the area comprising 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, 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, in direction MD and/or direction CD.
  7. 7. The laminate assembly (30) of claim 1, wherein the cleat (34) has a coefficient of static friction measured according to standard ASTM D1894, the coefficient of static friction being comprised between 50% and 150% of the coefficient of static friction in a resting state when the cleat (34) is stretched to 15% of a resting value.
  8. 8. The laminate assembly (30) of claim 1, wherein in a resting state the protruding element density of the plurality of protruding elements (34B) is greater than or equal to 23 protruding elements per cm, 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 cm 2.
  9. 9. The laminate assembly (30) of claim 1, wherein in a resting state, the plurality of protruding elements (34B) have a pattern comprising a repeating cleat pattern (44).
  10. 10. The laminate assembly (30) of claim 1, wherein a sum of areas defined on the base (34A) by orthogonal projections of protruding elements (34B) on the base (34A) is greater than or equal to 5% and less than or equal to 35% of a total area of bases of the cleat pattern (44).
  11. 11. The laminate assembly (30) of claim 1, wherein the thickness (E34A) of the base (34A) is greater than or equal to 10 μιη, preferably greater than or equal to 15 μιη, and less than or equal to 200 μιη, preferably less than or equal to 150 μιη.
  12. 12. The laminate assembly (30) according to claim 1, wherein the protruding elements (34A) are pins and/or studs and/or rods, each rod having a head provided at an end of the rod opposite the base.
  13. 13. An absorbent article, such as a disposable diaper, comprising the laminate assembly according to any one of the preceding claims.
  14. 14. A method for manufacturing a laminate assembly (30), the method comprising the steps of: -forming a cleat (34) by dispensing an elastomeric material in a forming device (100), the cleat comprising a base (34A) and a plurality of protruding elements (34B) extending from the base (34A); -assembling the support layer (32) and the cleat (34) by laminating the support layer (32) and the cleat (34), the support layer (32) comprising a nonwoven web (36, 38), the nonwoven web (36, 38) having a weight between 5g/m2 and 70g/m2, wherein the protruding elements (34B) form a cleat pattern (44) on the cleat (34), the sum of the areas defined on the base (34A) by orthogonal projections of the protruding elements (34B) on the base (34A) being greater than or equal to 1% of the total area of the base of the cleat pattern (44) and less than or equal to 40% of the total area of the base of the cleat pattern (44).

Description

Laminate assembly, diaper comprising such an assembly and method for manufacturing such an assembly The present application is a divisional application of the inventive patent application (application No. 201980020940.8, application No. 2019, application No. 03, application No. 20, application No. 201980020940.8, application No. "laminate assembly, diaper comprising such an assembly and method for manufacturing such an assembly") by eplerex corporation. Technical Field The present disclosure relates to laminate assemblies that may be used in the hygiene field, particularly absorbent articles, and in particular, for manufacturing elastic ears for diapers. Background Disposable diapers are typically composed of an absorbent central portion comprising at each end a front waistband portion having two front ears and a rear waistband portion having two rear ears for attaching the diaper to the wearer of the disposable diaper. Each rear ear is typically provided with a retaining means, for example with hooks, which cooperate with an application zone arranged on the front belt. In the hygiene field, this application area is often referred to as the "landing zone", or in the legend as the "comfort zone". However, due to movement of the wearer of the diaper, the diaper may droop at the ears and/or the front ears may move relative to the rear ears. Such sagging and/or shifting may cause discomfort to the wearer of the diaper and/or cause undesirable leakage. Disclosure of Invention The present invention aims to remedy at least some of these drawbacks. To this end, the present invention relates to a laminate assembly comprising a support layer and a cleat comprising an elastomeric material, the support layer and the cleat being laminated together, the cleat comprising a base and a plurality of protruding elements extending from the base, and the plurality of protruding elements protruding from a surface of the laminate assembly. By means of the cleat, in particular the protruding element, the displacement of the other surface relative to the cleat is reduced when the laminate assembly is in contact with the other surface. However, the protruding element does not allow the cleat to engage and hook with the other surface. For example, cleats make it impossible to suspend a weight of 1kg (kilogram) for a period of 10 seconds. In some cases, the 180 ° peel force of the cleats is less than or equal to 0.02N, and in some cases equal to 0N. The direction MD refers to the machine direction and refers to the direction of travel of the cleat in the machine during the manufacture of the cleat, and the direction CD refers to the cross direction and refers to the direction perpendicular to the direction MD. The "180 ° peel" method is a method for measuring the peel force, i.e., the force separating the laminate assembly from the applied area. This method is described below. Sample conditioning-test samples were conditioned at 23 ± 2 ℃ and 50% ± 5% relative humidity for 2 hours. Preparation of cleats-cleats are typically used in the direction MD. The cleats are typically in the form of a belt having a length in the direction MD. The portion of the belt in the direction MD was bonded to 80g/cm2 of paper and a 2kg (kilogram) roller was applied or rotated in one direction on the cleats, and then the roller was applied or rotated in the other direction (back and forth) along the entire length of the belt portion at a speed of about 700 mm/min. The paper and the slip-resistant strips were cut with scissors into strips 25.4mm (millimeters) wide in the MD direction. Each strip of paper has a length of 210mm, and the slip-resistant strip is located in the centre of the paper. Preparation of application zone-application zone the sample was 50mm wide in the direction MD and 200mm long at maximum and was cut in half longitudinally. Assembly-place the strip over the application area sample such that the anti-slip strip is centered on the application area sample. A 2kg roller is applied or rotated in one direction on the cleats and then applied or rotated in the other direction (back and forth) along the entire length of the belt at a speed of about 700 mm/min. The application area sample was placed in the jig of the cradle, the cut side was placed in the jig, and a weight of 1kg was hung from the lower portion of the belt for 10 seconds. The weight is then removed. This step ensures that the cleat and application area sample are assembled. Measurement-the assembly was then placed in a tensile tester with a 100N (newton) measurement unit. The strip is inserted into the upper (movable) jaw. The load cell reading is set to zero. The application area sample was inserted into the lower jaw (stationary) and a slight tension was created. The force must be between 0.02N and 0.05N. During insertion, the jaw spacing was 50mm. The assembly is centered between the two jaws. The test was performed with a constant displacement at a speed of 305mm/min, with a