US 12,127,924 B2
Method and apparatus of manufacturing a multilayer absorbing element for sanitary articles
Marino Di Berardino, Roccamontepiano (IT); and Fabio Di Berardino, Roccamontepiano (IT)
Assigned to TEXOL S.R.L., Alanno (IT)
Appl. No. 16/757,536
Filed by TEXOL S.R.L., Alanno (IT)
PCT Filed Nov. 6, 2018, PCT No. PCT/IB2018/058706
§ 371(c)(1), (2) Date Apr. 20, 2020,
PCT Pub. No. WO2019/092594, PCT Pub. Date May 16, 2019.
Claims priority of application No. 102017000127010 (IT), filed on Nov. 8, 2017.
Prior Publication US 2021/0186777 A1, Jun. 24, 2021
Int. Cl. A61F 13/511 (2006.01); A61F 13/15 (2006.01); A61F 13/512 (2006.01)
CPC A61F 13/5116 (2013.01) [A61F 13/15203 (2013.01); A61F 13/15699 (2013.01); A61F 13/15764 (2013.01); A61F 13/51104 (2013.01); A61F 13/5123 (2013.01); A61F 2013/15414 (2013.01); A61F 2013/15869 (2013.01); A61F 2013/15878 (2013.01); A61F 2013/51165 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method for manufacturing a multilayer absorbent element for organic fluids capable of being incorporated into a sanitary article, comprising:
deforming a first layer of sheet material by embossing, to obtain in it a plurality of protrusions alternating with a plurality of intermediate zones without said protrusions and substantially planar;
overlapping onto said first layer of sheet material a second layer of sheet material;
making a plurality of through holes on said first layer of sheet material and on said second layer of sheet material, at said intermediate zones of said first layer;
joining together said first layer and said second layer of sheet material in proximity of, or at, the holes of said plurality;
wherein said first layer of sheet material is a non-woven fabric (NWF) and said second layer of sheet material is a plastic film,
wherein a step of application of a hydrophilic onto said first layer is provided, which hydrophilic agent is applied in proximity of, or at, walls of through holes of said plurality, which hydrophilic agent is a surfactant agent, and
wherein said joining step provides a joining between the first layer of sheet material and the second layer of sheet material performed along the perimeter of each through hole of said plurality.