Polypropylene resins heterophasic copolymer

The list of flexible polymeric roll materials suitable for atmospheric plasma processing is expansive. Mainstream resin types include polypropylene (homopolymers, heterophasic copolymers, and random copolymers), polyethylene (low, medium, and high density polyethylene resins), a family of specialty polyolefins which includes polybutene-1, advanced polypropylene resins from in-reactor alloying processes and polypropylene compounds, and fiuoropolymers. By process type, these materials (in mono- or multiple layers) can be generally represented by the following ... 

From the three basic categories of polypropylene, namely, homopolymers, heterophasic copolymers, and random copolymers (with ethylene), there are specialty resins with enhanced capabilities for specific applications. Producers of large blow-molded or thermoformed parts can thus utilize grades with high melt strength to fabricate heat-resistant under-the-hood automotive parts. 

Heterophasic copolymer resins (so called because their morphology typically shows two or more phases) have lower stiffness and improved toughness at low temperature, down to -40°C (depending on the dispersed phase type and amount). These resins often demonstrate more complex thermal behavior (e.g., two or more melting points and reduced stiffness at elevated temperature). You can find examples of typical grades of polypropylene resins in Table 1.7. Chapter 2 describes propylene structure-property relationships that suit a variety of end-use applications. 

Ethylene-propylene resins, random heterophasic polypropylene (PP) copolymer 0.890 Coextruded form/fill/seal film, hot fill, heavy duty sacks, medical and personal care films, blends with other PP or PE grades Soft poly(vinyl chloride), nonpolymer packaging, LDPE, LLDPE... 

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