US 11,946,177 B2
Polypropylene compositions for soft nonwoven fabrics
Adi Afriat, Haifa (IL); Michael Gishboliner, Karmiel (IL); Alon Shaham, Kiryat-Bialik (IL); Rotem Shemesh, Haifa (IL); and Michael Shuster, Nesher (IL)
Assigned to CARMEL OLEFINS LTD, Haifa (IL)
Appl. No. 17/760,505
Filed by CARMEL OLEFINS LTD., Haifa (IL)
PCT Filed Apr. 1, 2020, PCT No. PCT/IL2020/050394
§ 371(c)(1), (2) Date Mar. 15, 2022,
PCT Pub. No. WO2021/059260, PCT Pub. Date Apr. 1, 2021.
Claims priority of provisional application 62/904,009, filed on Sep. 23, 2019.
Prior Publication US 2022/0349098 A1, Nov. 3, 2022
Int. Cl. D04H 1/4291 (2012.01); C08L 23/12 (2006.01); C08L 23/14 (2006.01); C08L 23/16 (2006.01); D01F 1/04 (2006.01); D01F 1/10 (2006.01); D01F 6/46 (2006.01)
CPC D04H 1/4291 (2013.01) [C08L 23/12 (2013.01); C08L 23/142 (2013.01); C08L 23/16 (2013.01); D01F 1/04 (2013.01); D01F 1/10 (2013.01); D01F 6/46 (2013.01); D10B 2321/021 (2013.01); D10B 2321/022 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A composition for manufacturing polypropylene-based soft and pleasant to touch nonwoven fabrics comprising
at least three components A, B, and C as follows:
i) component A being a semi-crystalline propylene homopolymer or random copolymer comprising from 0 to 5 wt % of ethylene or C4-C10 alpha-olefin, while constituting from 55 to 90 wt % of said composition;
ii) component B being a low crystallinity non-crosslinked copolymer of propylene comprising from 15 to 30 wt % of ethylene or C4-C10 alpha-olefin, while constituting from 9 to 35 wt % of said composition; and
iii) component C being a low crystallinity copolymer of propylene comprising from 40 to 60 wt % of ethylene or C4-C10 alpha-olefins, while constituting from 1 to 10 wt % of said composition, and
said composition exhibiting in DMTA tests only two separate glass transition peaks; and
wherein said only two separate glass transition peaks include a low temperature peak associated with glass transition of component C, and a peak at higher temperature associated with joint glass relaxation of components A and B.