US 12,005,692 B2
Nonwoven laminate
Arun Prasad Venugopal, Weinheim (DE); and Gerhard Schoepping, Zwingenberg (DE)
Assigned to CARL FREUDENBERG KG, Weinheim (DE)
Filed by Carl Freudenberg KG, Weinheim (DE)
Filed on Jul. 20, 2020, as Appl. No. 16/932,852.
Claims priority of application No. 19187652 (EP), filed on Jul. 22, 2019.
Prior Publication US 2021/0023815 A1, Jan. 28, 2021
Int. Cl. B32B 5/26 (2006.01); B32B 5/02 (2006.01); B32B 5/08 (2006.01); B32B 7/12 (2006.01); B32B 37/04 (2006.01); D04H 1/06 (2012.01); D04H 1/435 (2012.01); D04H 1/46 (2012.01); D04H 1/55 (2012.01); D04H 1/559 (2012.01)
CPC B32B 5/26 (2013.01) [B32B 5/022 (2013.01); B32B 5/08 (2013.01); B32B 5/267 (2021.05); B32B 7/12 (2013.01); B32B 37/04 (2013.01); D04H 1/06 (2013.01); D04H 1/435 (2013.01); D04H 1/46 (2013.01); D04H 1/55 (2013.01); D04H 1/559 (2013.01); B32B 2250/03 (2013.01); B32B 2250/05 (2013.01); B32B 2250/20 (2013.01); B32B 2250/40 (2013.01); B32B 2262/0276 (2013.01); B32B 2262/0284 (2013.01); B32B 2262/12 (2013.01); B32B 2262/144 (2021.05); B32B 2307/54 (2013.01); B32B 2307/546 (2013.01); B32B 2307/5825 (2013.01); B32B 2307/718 (2013.01); B32B 2307/736 (2013.01); B32B 2367/00 (2013.01); B32B 2605/08 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A nonwoven laminate, comprising in order
a spunbond nonwoven layer (A) comprising fibres, which comprise polyethylene terephthalate (PET) and copolyester;
an optional spunbond nonwoven layer (B) comprising fibres, which comprise polyethylene terephthalate (PET) and copolyester, the nonwoven layer (B) having a higher copolyester content than nonwoven layer (A);
a needled staple fibre nonwoven layer (C), comprising:
monocomponent polyethylene terephthalate (PET) staple fibres (c1), and
multicomponent staple fibres (c2), which comprise at least a polyethylene terephthalate (PET) component and a copolyester component;
an optional spunbond nonwoven layer (D) comprising fibres, which comprise polyethylene terephthalate (PET) and copolyester, the nonwoven layer (D) having a higher copolyester content than nonwoven layer (E);
a spunbond nonwoven layer (E) comprising fibres, which comprise polyethylene terephthalate (PET) and copolyester;
wherein all layers are melt-bonded to each other,
wherein a melting point of the copolyester in spunbond nonwoven layers (A) and (E) is higher than a melting point of the copolyester in needled staple fibre nonwoven layer (C) by at least 30 degrees Celsius,
wherein non of layer (A), (B), (C), (D), and (E) is mechanically bonded to any other of layers (A), (B), (C), (D) and (E), and
wherein none of the layers contain a polyolefin.