US 12,225,953 B2
Method of treating a textile with graphene and textile so obtained
Giulio Giuseppe Cesareo, Milan (IT); and Laura Giorgia Rizzi, Saronno (IT)
Assigned to Directa Plus S.p.A., Lomazzo (IT)
Appl. No. 17/927,770
Filed by DIRECTA PLUS S.P.A., Lomazzo (IT)
PCT Filed May 24, 2021, PCT No. PCT/EP2021/063759
§ 371(c)(1), (2) Date Nov. 25, 2022,
PCT Pub. No. WO2021/239663, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 102020000012262 (IT), filed on May 25, 2020.
Prior Publication US 2023/0243089 A1, Aug. 3, 2023
Int. Cl. B01D 71/02 (2006.01); A41D 13/11 (2006.01); B01D 39/08 (2006.01); B01D 39/16 (2006.01); B01D 39/20 (2006.01); B82Y 30/00 (2011.01); D06B 3/18 (2006.01); D06M 11/74 (2006.01); D06M 16/00 (2006.01); D06M 101/20 (2006.01); D06M 101/06 (2006.01); D06M 101/32 (2006.01); D06M 101/38 (2006.01)
CPC A41D 13/11 (2013.01) [B01D 39/083 (2013.01); B01D 39/1623 (2013.01); B01D 39/2058 (2013.01); B01D 71/0211 (2022.08); B82Y 30/00 (2013.01); D06B 3/18 (2013.01); D06M 11/74 (2013.01); D06M 16/00 (2013.01); B01D 2239/0241 (2013.01); B01D 2239/0258 (2013.01); B01D 2239/0442 (2013.01); B01D 2239/0464 (2013.01); B01D 2239/0618 (2013.01); B01D 2239/0627 (2013.01); B01D 2239/10 (2013.01); D06M 2101/06 (2013.01); D06M 2101/20 (2013.01); D06M 2101/32 (2013.01); D06M 2101/38 (2013.01); D06M 2200/00 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for increasing the electrical and/or thermal conductivity, as well as the filtering power and the germ-blocking properties of a textile, comprising the steps of:
a) preparing an impregnation composition consisting of a water dispersion comprising:
from 1 to 65 g/L of graphene consisting of graphene nanoplatelets, in which at least 90% have a lateral dimension (x, y) from 50 to 50000 nm and a thickness (z) from 0.34 to 50 nm;
from 10 to 500 g/L of a polymeric binder,
from 1 to 50 g/L of an anti-migration and wetting agent,
b) continuously stirring the impregnation composition in a stirring tank;
c) feeding the impregnation composition into an impregnation tank to form an impregnation bath in the impregnation tank;
d) providing a textile in the form of a roll, unwinding the roll and passing the textile in the impregnation bath until it is impregnated;
e) passing the impregnated textile through at least a couple of squeezing rolls to remove excess impregnation bath;
f) treating the textile of step e) in an oven to dry it at a temperature of between 100 and 200° C. to fix the composition on the textile;
g) passing the textile of step f) through a finish bath in a finish tank, the finish bath comprising a fixing agent dispersed in water in an amount of from 1 to 300 g/L;
h) passing the impregnated textile of step g) through at least two squeezing rolls to remove excess finish bath; and
i) treating the textile of step h) in an oven to dry it at a temperature of between 100 and 200° C. to fix the fixing agent on the textile.