US 11,898,283 B2
Method of making a spunbond nonwoven laminate
Sebastian Sommer, Troisdorf (DE); Tobias Wagner, Cologne (DE); Gerold Linke, Hennef (DE); Patrick Bohl, Troisdorf (DE); and Morton Rise Hansen, Aalborg (DK)
Assigned to REIFENHAEUSER GMBH & CO. KG MASCHINENFABRIK, Troisdorf (DE); and FIBERTEX PERSONAL CARE A/S, Aalborg (DK)
Filed by Sebastian Sommer, Troisdorf (DE); Tobias Wagner, Cologne (DE); Gerold Linke, Hennef (DE); Patrick Bohl, Troisdorf (DE); and Morton Rise Hansen, Aalborg (DK)
Filed on Feb. 3, 2023, as Appl. No. 18/105,270.
Application 18/105,270 is a continuation of application No. 16/207,097, filed on Dec. 1, 2018, granted, now 11,591,728.
Prior Publication US 2023/0175176 A1, Jun. 8, 2023
Int. Cl. B32B 5/26 (2006.01); B32B 5/02 (2006.01); D04H 1/544 (2012.01); D04H 1/541 (2012.01); D04H 1/4391 (2012.01); D04H 3/10 (2012.01); D04H 13/00 (2006.01); D04H 1/559 (2012.01); D04H 3/007 (2012.01); D04H 3/16 (2006.01)
CPC D04H 1/43918 (2020.05) [B32B 5/022 (2013.01); B32B 5/26 (2013.01); D04H 1/43912 (2020.05); D04H 1/43914 (2020.05); D04H 1/544 (2013.01); D04H 1/5412 (2020.05); D04H 1/5414 (2020.05); D04H 1/559 (2013.01); D04H 3/007 (2013.01); D04H 3/10 (2013.01); D04H 13/002 (2013.01); D04H 13/003 (2013.01); B32B 2262/0253 (2013.01); D04H 3/16 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method of making a laminate having a plurality of stacked spunbond nonwoven layers, the method comprising the steps of:
making at least two and at most four of these spunbond nonwoven layers with or from crimped continuous filaments with crimping of the continuous filaments in each of these spunbond nonwoven layers that is equal to at least three loops per centimeter of length and that is different from a degree of crimping of the continuous filaments in the other spunbond nonwoven layers;
making the crimped continuous filaments of the spunbond nonwoven layers as multicomponent filaments each of a first plastic component that consists of only one first plastic and a second plastic component that is mixture of a second plastic and a third plastic with each of the two first and second plastic components being present in the multicomponent filaments in a proportion of at least 10 wt % and a mass of the third plastic relative to a mass of all the multicomponent filaments of the laminate being less than 25 wt %; and
setting a molecular weight distribution of the third plastic greater than a molecular weight distribution of the first plastic and greater than a molecular weight distribution of the second plastic.