Patent ID: 11946177
Assignee: CARMEL OLEFINS LTD
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D  C | IPC C  D

Claim 16:
17. A polypropylene-based nonwoven fabric 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 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 comprise a low temperature peak associated with glass transition of component C, and a peak at a higher temperature associated with joint glass relaxation of components A and B.