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

Claim 3:
4. A process for manufacturing a polypropylene composition for soft nonwoven fabrics with enhanced tactile performance, comprising steps of
i) polymerizing propylene using supported Ziegler-Natta catalytic system, with comonomers selected from ethylene and C4-C10 alpha-olefins in amounts corresponding to desired comonomer contents,
in order to obtain three propylene-based copolymers to serve as three components A, B and C according to claim 1; and

ii) melt mixing said components A, B and C in any appropriate melt mixing device to produce a 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.