Thermoplastic elastomers blow molding

HTR-4275. [DuPont] Thermoplastic polyester elastomer blow molding resin. 

Polyamide-polyolefin blends Moldings with improved modulus and heat distortion Multilayer containers Blow molding containers Polyolefin composites Thermoplastic elastomers Crosslinked, molded sheets... 

Important are behaviors associated and interrelated with plastic materials (thermoplastics, thermosets, elastomers, reinforced plastics, etc.) and fabricating processes (extrusion, injection molding, blow molding, forming, foaming, reaction injection molding, etc.). They are presented so that the technical or non-technical reader can readily understand the interrelationships. 

Auteuil J.G.D , Peterson D.E., and Rader C.P., Blow molding of thermoplastic elastomers A major opportunity for the plastic processors, Antec 89, 47th Annual Tech. Conference of SPE, New York, May 1, 1989, 1740. 

Duracryn . [DuPont] Thermoplastic elastomer for inj. molding, extrusion, and blow molding of reinforced hose, flexible and supported tubing, seals, gaskets, mech. goods, profile extrusions, wire and cable jacketing, automotive trim and under-the-hood parts. 

Riteflex . [Hoechst Celanese/Engineer-ing Plastics Hoechst UK] Thermoplastic polyester elastomer for blow molding, inj. molding, or extrusion, polymer modification, hydraulic tub-itig, wire coatings, beUows, seals, dust covers. 

Olefinic Thermoplastic Elastomers Blends of EPDM or EP rubbers with polypropylene or polyethylene, optionally eross-linked. Has low density, good dielectric and mechanical properties, and processibility but low oil resistance and high flammability. Processed by extrusion, injection and blow-molding, thermoforming, and calendering. Used in auto parts, construction, wire jackets, and sporting goods. Also called TPO. 

Uses Thermoplastic polymer (can be made thermosetting) for inj. molding, extrusion, vacuum forming, calendering, and blow molding in adhesives coated fabrics and films automotive parts cable jacketing scuba equip. shoe soles ski boots, etc. fibers for structural textiles coatings elastomer for sealants, caulks, adhesives, shoes, en-... 

Figure B.3 Schematic depiction of the blow molding process. (Ref Rader, C.R, Thermoplastic Elastomers , Handbook of Plastics, Elastomers and Composites, 3 ed., C.A. Harper, ed., McGraw-Hill, New York, 1996)...

PBT is also blended with PMMA, PET/PC, and polybntadiene. Another development involving the use of PBT is coextrusion of PBT and copolyester thermoplastic elastomer. This can then be blow molded into under-hood automotive applications, which minimize noise vibration. PBT is suitable for applications requiring dimensional stability. It is particnlarly good in water, and it is also resistant to hydrocarbons oils without stress cracking. To improve PBT s poor notch impact strength, copolymerization with ethylene and vinyl acetate will improve toughness. 

For optimum performance, most TPEs benefit from drying before processing. TPE-based products can be manufactured by injection molding, blow molding, and extrusion. TPEs can also be thermoformed and thermally welded like typical thermoplastics. These production processes give TPEs a significant economic advantage over thermoset elastomers. 

It is produced at one half the weight and with four times the tear strength of rubber boots, and can be processed on plastics blow molding equipment in one twelfth the time. Car makers are now saying that the boot of HYTREL lasts six times longer than the older rubber designs. What makes this story so powerful is that a polyester elastomer has succeeded, far beyond the capability of any rubber, in an application where many experts insisted that no thermoplastic could survive. 

Thermoplastic copolyester elastomers of higher molecular weights are needed for articles produced by blow molding and for shock absorber elements. This can be obtained in the so-called solid-state polymerization. In this, the third stage, polymerization... 

Heineck, D. W. Blow Molded Thermoplastic Elastomers. SPE Blow Molding Div., spring 1988. 

Polyamide Thermoplastic Elastomers n Copolymers containing soft polyether and hard polyamide blocks having good chemical, abrasion, and heat resistance, impact strength, and tensile properties. Processed by extrusion and injection and blow molding. Used in sporting goods, auto parts, and electrical devices. Also called polyamide TPE. 

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