Coextruded polypropylene film

Cast polypropylene (PP) is extensible, moisture-resistant, clear and seals at temperatures above those used in steam sterilisation. Oriented PP is strong and can be used in thin gauges. Unless coated or coextruded the film cannot be heat sealed without distortion. OPP is very clear, but can also make an opalescent film. Has a similar degree of inertness to HDPE. 

Metallyte. [Mitsui Petrochemicals] One side coextruded oriented polypropylene film, one side metal, heat salable high opacity film for laminaticxis. 

Polyolefins. Low density polyethylene and polypropylene have been developed as sheet and hollow fiber mlcroporous membranes, respectively, for use In plasmapheresis. Polyethylene Is made porous by stretching the annealed film ( ), while polypropylene la made porous by coextruding hollow fibers with a leachable plasticizer. Neither membrane has been prepared with small pore dimensions suitable for protein rejection. These polyolefin membranes are characterized by good chemical stability, but require special surfactant treatments to make them wettable. Their low deformation temperature precludes the use of steam sterilization. Because they are extruded without the usual antl-oxldants and stabilizers, their stability la lower than Injection molding formulations of the same polymer. 

Coextrusion produces a multi-ply material directly from the individual resins. The method is limited to thermoplastic materials such as polythene, polypropylene and nylons. Thin layers of extruded bonding resins are necessary to combine many of the resins. Coextrudates have to be surface printed and the outer film cannot be reverse printed as it is often used with more conventional laminates with a film outer ply. 

Film Applications Kraton polymers blended with polypropylene and coextruded with ethylene vinyl acetate to form multilayer structures are suitable for food-wrap applications and can offer an excellent... 

Santonox, Antioxidant, Rexsys America LP Santoprene, Polypropylene EPDM-based vul-canizate. Advanced Elastomer Systems LP Santowhite, Antioxidant, Rexsys America LP Saran, Barrier resins, Dow Plastics Saran Films, Plastic films, Dow Plastics Saranex, Coextruded film, Dow Plastics Saret, Crosslinking agents, Sartomer Co. Inc. Sarlink, Dynamically vulcanized thermoplastic elastomers, DSM Thermoplastic Elastomers Inc. 

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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