Laminates, melt blown

One of the important aspects of the development of P-plastomers was the expectation that these materials were amenable to plastics processing such as fiber and film formation and yet would yield soft elastic fabrication. This combination was hitherto unknown [24]. The formation of nonwoven fabrics including spun-bond and melt-blown nonwoven fabrics as well as their laminated forms has been documented. Similarly, cast film operation to form elastic monolithic films or composite structures which are not only amenable to these processes, but also to a variety of postfabrication processes have been described. 

Plastic scrims are related to the same category of inhibited plastics. In a non-woven form, the inhibited film is first extruded. The polymer webbing (usually melt-blown inhibited polymer fibers) is then laminated to the film. Zerust ferrous plastic scrim is used in the manufacture of airtight packages inside which a protective atmosphere is created by VCI vapors. The fibrous scrim layer also protects packed goods from impact damage. 

PBS is a typical thermoplastic and can be processed via various methods, such as extrusion, injection molding, film blowing, fiber spinning, and thermoforming. It has been reported that PBS can be processed into melt-blown, multifilament, monofilament, nonwoven, flat and split yarn, injection-molded products, film, paper laminate, sheet, and tape for applications in the textile and plastic industries. 

JP Patent 11,117,164, Biodegradable nonwoven laminates of melt-blown nonwoven fabrics of aliphatic polyester fibers and spnnbonded nonwoven fabrics of urethane bond-containing butylene succinate copolymer fibers , Kawano, Akitaka Kin, Kasue, 1999. 

Film. The blown film process is most commonly used in the production of PB film from resins with melt indexes from 0.3 io 10 g/10 min at a melt temperature of200-215DC using conventional equipment. Mechanical properties of blown PB film depend on the degree of orientation and other processing parameters. PB film can be sealed ai 100 220 (1. Another technique for the PB film production consists of film casting from the melt on polished chilled rolls and co-extrusion or lamination with other films. 

An important development in the extrusion of film is the so called co-extrusion technique, where two or more layers of film are extruded simultaneously to produce a laminate with improved barrier, appearance or mechanical properties. Each layer is fed from a separate extruder. Both cast and blown film techniques are used the composite tubular film may be rotated in the same way as in simple lay extrusion whilst the flat film die allows individual adjustment of the melt streams. 

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