US 12,320,070 B2
Method for producing a cellulose paper material from used textiles
Richard Herchl, Ried im Innkreis (AT); and Christian Weilach, Vöcklabruck (AT)
Assigned to LENZING AKTIENGESELLSCHAFT, Lenzing (AT)
Appl. No. 17/596,094
Filed by LENZING AKTIENGESELLSCHAFT, Lenzing (AT)
PCT Filed May 29, 2020, PCT No. PCT/EP2020/065036
§ 371(c)(1), (2) Date Dec. 2, 2021,
PCT Pub. No. WO2020/245053, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 19178178 (EP), filed on Jun. 4, 2019.
Prior Publication US 2022/0235519 A1, Jul. 28, 2022
Int. Cl. D21H 13/20 (2006.01); D21C 5/00 (2006.01)
CPC D21H 13/20 (2013.01) [D21C 5/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for manufacturing a cellulosic paper material, wherein the method comprises:
providing used textiles as a starting material, wherein the used textiles comprise at least one of residues from a clothing manufacture or used clothes,
wherein the used textiles comprise cellulose and non-cellulosic foreign matters;
wherein the non-cellulosic foreign matters comprise at least one of synthetic plastic or metal oxide;
partially depleting the non-cellulosic foreign matters from the cellulose, to provide a depleted starting material;
forming the cellulosic paper material from the partially depleted starting material; and
further comprising at least one of the following features:
wherein the partially depleting the non-cellulosic foreign matters from the cellulose is such that intrinsic foreign matters at least partially remain in the depleted starting material; or
substantially completely depleting the non-cellulosic foreign matters from the cellulose such that highly pure cellulose fibers are provided as depleted starting material.