US 11,858,238 B2
Process for manufacturing multi-layer substrates comprising sandwich layers and polyethylene
Nikhil P. Dani, Pleasanton, CA (US); Joerg Hendrix, Kennesaw, GA (US); Scott Wood, Pleasanton, CA (US); Hubert Chan, Pleasanton, CA (US); Mark Pszczolkowski, Pleasanton, CA (US); and Daniela Fritter, Pleasanton, CA (US)
Assigned to THE CLOROX COMPANY, Oakland, CA (US)
Filed by THE CLOROX COMPANY, Oakland, CA (US)
Filed on Feb. 4, 2022, as Appl. No. 17/665,383.
Application 17/665,383 is a continuation of application No. 16/710,857, filed on Dec. 11, 2019, granted, now 11,273,625.
Claims priority of provisional application 62/860,655, filed on Jun. 12, 2019.
Claims priority of provisional application 62/828,301, filed on Apr. 2, 2019.
Claims priority of provisional application 62/784,274, filed on Dec. 21, 2018.
Prior Publication US 2022/0152994 A1, May 19, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 23/02 (2006.01); B32B 27/32 (2006.01); B32B 27/12 (2006.01); B32B 7/12 (2006.01); B32B 27/10 (2006.01); B32B 29/00 (2006.01); D21H 13/14 (2006.01); D21H 27/00 (2006.01); D21H 27/02 (2006.01); A47L 13/17 (2006.01); B32B 5/02 (2006.01); C11D 17/04 (2006.01); C11D 3/30 (2006.01); B08B 1/00 (2006.01); D21F 11/00 (2006.01); D21F 11/14 (2006.01); D21H 27/36 (2006.01)
CPC B32B 23/02 (2013.01) [B08B 1/006 (2013.01); B32B 5/022 (2013.01); B32B 7/12 (2013.01); B32B 27/10 (2013.01); B32B 27/12 (2013.01); B32B 27/32 (2013.01); B32B 29/002 (2013.01); C11D 3/30 (2013.01); C11D 17/041 (2013.01); D21F 11/006 (2013.01); D21F 11/14 (2013.01); D21H 13/14 (2013.01); D21H 27/002 (2013.01); D21H 27/02 (2013.01); D21H 27/36 (2013.01); A47L 13/17 (2013.01); B32B 2250/03 (2013.01); B32B 2250/40 (2013.01); B32B 2260/04 (2013.01); B32B 2262/062 (2013.01); B32B 2274/00 (2013.01); B32B 2307/724 (2013.01); B32B 2307/728 (2013.01); B32B 2367/00 (2013.01); B32B 2432/00 (2013.01); Y10T 428/3188 (2015.04); Y10T 428/31855 (2015.04)] 19 Claims
OG exemplary drawing
 
1. A multi-layer substrate including a top surface layer comprising tissue paper, a bottom surface layer comprising tissue paper, and a thermoplastic material that comprises polyethylene or has a tan delta value of from 0.2 to 0.4 within the temperature range of 100° F. to 350° F. wherein the multi-layer substrate is formed by the following process:
(a) providing the top surface layer comprising tissue paper, the tissue paper including fibers;
(b) providing the bottom surface layer comprising tissue paper, the tissue paper including fibers;
(c) providing the thermoplastic material;
(d) sandwiching the thermoplastic material between the top and bottom surface layers, and heating the thermoplastic material to a temperature at which the thermoplastic material softens, so as to bond the thermoplastic material to groups of fibers in the tissue paper top and bottom surface layers that are in contact with the thermoplastic material as it softens, such that no chemical adhesives are used to adhere the top and bottom surface layers to the thermoplastic material;
(e) wherein after heat softening, the thermoplastic material includes open pores through the thermoplastic material, providing a fluid pathway therethrough such that any liquid loaded into the top surface layer is able to pass through the fluid pathway, into the bottom surface layer; and
(f) wherein a cleaning composition is loaded onto the multi-layer substrate wherein the fluid pathway through the thermoplastic material allows the cleaning composition to travel between the top surface layer and the bottom surface layer.