Processing, thermoplastics family mold

Limera is a family of styrenic thermoplastic/ rubber compositions. The compositions are suitable for compounding with a variety of additives, fillers and polymers such as PS, PVC, PMMA, ABS and PPE. They are processable by injection molding, extrusion and blow molding. 

ALLYL ESTER RESINS. The allyl radical (CH2CH=CH2) is the basis of the allyl family of resins. Allyl esters arc based on monobasic and dibasic acids and are available as low-viscosity monomers and thermoplastic prepolymers. They are used as crosslinking agents for unsaluraied polyester resins and in the preparation of reinforced thermoset molding compounds and high-performance transparent articles. All modem thermoset techniques may be used for processing allyl resins. 

BFGoodrich Specialty Chemicals produces a family of thermoplastic alloys that are inherently conductive. Alloys with 15% of the active conductive polymer differ little in surface resistivity from alloys with 25% active polymer. Further, the conductive polymer content remains relatively constant through processes such as injection molding, extrusion, and thermoforming, unlike resins containing conductive fillers. In contrast to chemical antistats, the conductive polymers are active at all humidity levels, do not lose their potency over time, and add no ionic contaminants to the surrounding atmosphere. 

PAEK family of resins represent some of the highest-temperature polymers that can be manufactured by conventional thermoplastic processes. However, high processing temperatures are required because melt temperatures are in the range of 335 to 366°C. PAEK polymers can be injection molded, extruded, compression molded, and transfer molded. However, the resins should be thoroughly dried before processing. 

The physical and thermal properties of bacterial PHA copolymers can be regulated by varying their molecular structure and copolymer compositions. The P(3HB) homopolymer is a relatively stiff and brittle material. The introduction of hy-droxyalkanoate comonomers into a P(3HB) chain greatly improves its mechanical properties. The PHA family of polyesters offers a wide variety of polymeric materials, from hard ciystalline plastic to elastic rubber. The PHA materials behave as thermoplastics with melting temperatures of 50-180°C and can be processed by conventional extrusion and molding equipment (Holm 1988). 

Ethylene-vinyl acetates (EVA) copolymers are in the polyolefin family of thermoplastics. They are used in all processes, particularly for extrusion, injection molding, and blow molding. They are used either alone or are coextruded or coinjected and used in compounds to provide unique properties. They approach elastomeric materials in their softness and flexibility. 

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