Method for providing a laminate with a hook and loop fastening volume, and resulting laminate

A laminate comprising at least one support element in the form of a non-woven fabric comprising at least a Spunbond layer having a lower face and an upper face, and at least one non-woven fabric with loops made of a material comprising synthetic thermoplastic polymers, having a lower face and an upper face, wherein said upper face of the at least one support element in the form of a non-woven fabric is secured to said lower face of the non-woven fabric with loops, wherein the non-woven fabric with loops comprises, in succession, connection zones and zones forming the loops, wherein within the zones forming the loops, the loops are asymmetrical in form, and said at least one non-woven fabric with loops is a product obtained at the end of the formation of a strip of fibers and/or filaments which have been consolidated, said non-woven fabrics with loops comprising fibers and/or filaments and connections between the fibers and/or the filaments made directly by welding or indirectly by means of a layer of adhesive or a layer of binder, wherein the curve representing the force required to stretch the laminate along a given axis of the laminate, as a function of elongation, comprises a segment in which, starting from a zero elongation value, the force increases from zero up to a maximum force, wherein said maximum force corresponds to the rupture of the laminate, and the curve comprises an inflection point (Pi) on said segment.

A method for providing gripping capacity to a laminate comprising at least one support element in the form of a non-woven fabric comprising at least one Spunbond layer, having a lower face and an upper face, and at least one non-woven fabric with loops, having a lower face and an upper face, wherein the lower face of the at least one non-woven fabric with loops is secured to the upper face of the at least one support element in the form of a non-woven fabric, and said at least one non-woven fabric with loops is a product obtained at the end of the formation of a strip of fibers and/or filaments which have been consolidated, said non-woven fabrics with loops comprising fibers and/or filaments and connections between the fibers and/or the filaments made directly by welding or indirectly by means of a layer of adhesive or a layer of binder;

• the method comprising the steps of:
• unrolling a strip of the non-woven fabric with loops and a strip of the support element in the form of a non-woven fabric in order to pass them into a gap formed between two upper and lower rollers in order to secure the support element in the form of a non-woven fabric and the non-woven fabric with loops to one another, wherein at the gap, a face of the upper roller coming in contact with the upper face of the non-woven fabric with loops has a first speed orientated in a direction of unrolling of the laminate, or in a machine direction or MD, and wherein at the gap, a face of the lower roller coming in contact with the lower face of the support element in the form of a non-woven fabric has a second speed orientated in the same direction of unrolling of the laminate, and wherein the first and second speeds are adjusted so that the first speed is greater than the second speed, wherein the first and the second speeds are adjusted so that the ratio of the first speed to the second speed (or the overfeeding coefficient) is between 1.1 and 1.6, so that a top of a zone forming loops or a middle(S) of a top part, wherein the top part is a flattened top, is offset in a machine direction, with respect to a central point (P0) equidistant from the two successive connection zones between which the zone forming loops extends.