1. Hollow-body blow-molding processes

Hollow-body manufacturing techniques combine a preliminary thermoplastic polymer melting operation with a blow-molding operation.

The conditions under which the first operation is carried out will, depending on the different processes, affect the properties of the final object.

The extrusion blow-molding technique (figure 1 ) shapes the polymer from its molten state (viscous or viscoelastic state). The structure and arrangement of the macromolecular chains are determined mainly by the cooling of the hollow body in contact with the cold mold, and to a lesser extent by the history of deformations and stresses to which the molten material has been subjected during blow molding.

The injection blow...

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Hollow-body blow-molding processes

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Bi-orientation phenomenon

Bibliography

(1) - DECROLY (P.) - Les apports de l'orientation moléculaire. - Plastiques Flash, p. 32-36 (1982).
(2) - SEGUELA (R.) - Relations mises en œuvre – structure – propriétés dans les matériaux polymères. - Revue de métallurgie, CIT/Sciences...

Software tools

Virtual Prototyping (online software for simulating preform heating and blow molding)

Plastic Technologies, Inc (PTI) http://www.plastictechnologies.com/services/td/virtual_prototyping/

Websites

http://fr.wikipedia.org/wiki/Injection-soufflage

http://en.wikipedia.org/wiki/Polyethylene_terephthalate

INRS: toxicological data sheet no. 120 (acetaldehyde) http://www.inrs.fr

...

Events

Salon de l'Emballage every two years at Villepinte http://www.emballageweb.com/

Interpack" exhibition in Düsseldorf every three years http://www.interpack.com

Kunstoffe" in Düsseldorf every three years

Standards and norms

Determination of polymer viscosity in dilute solution using capillary viscometers – General principles - ISO 1628-1 - 2009
Determination of polymer viscosity in dilute solution using capillary viscometers – Homopolymers and copolymers of thermoplastic polyesters (TP) - ISO 1628-5 - 1998
Détermination de l'indice de fluidité à chaud des thermoplastiques, en masse (MFR) et en volume (MVR) Équivalences ASTM :...