Publication

Pre-Heating of Thermoplastic Sandwich Materials for Rapid Thermoforming

Jan-Anders Edvin Maansson, Pierre-Etienne Bourban, Jean-Marie Drezet
2000
Journal Articles

Abstract

The thermoforming of thermoplastic sandwich structures based on the same matrix polymer for the face sheets and the core requires precise temperature control both before and during forming. Two opposing requirements must be satisfied: the face sheets must be heated to above the glass transition temperature Tg of the polymer whereas the temperature of the core should not approach Tg in order to avoid the collapse of the foam cells. A numerical model was used to determine the optimal thermal parameters for thermoforming using an inverse method.

Official source

https://infoscience.epfl.ch/entities/publication/30aa6d83-e401-4d3b-a005-008b9043d9ee

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Jan-Anders Edvin Maansson, Pierre-Etienne Bourban, Jean-Marie Drezet
2000
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/30aa6d83-e401-4d3b-a005-008b9043d9ee

About this result

Related concepts (32)

Glass transition

The glass–liquid transition, or glass transition, is the gradual and reversible transition in amorphous materials (or in amorphous regions within semicrystalline materials) from a hard and relatively brittle "glassy" state into a viscous or rubbery state as the temperature is increased. An amorphous solid that exhibits a glass transition is called a glass. The reverse transition, achieved by supercooling a viscous liquid into the glass state, is called vitrification.

Composite material

A composite material (also called a composition material or shortened to composite, which is the common name) is a material which is produced from two or more constituent materials. These constituent materials have notably dissimilar chemical or physical properties and are merged to create a material with properties unlike the individual elements. Within the finished structure, the individual elements remain separate and distinct, distinguishing composites from mixtures and solid solutions.

Thermoset polymer matrix

A thermoset polymer matrix is a synthetic polymer reinforcement where polymers act as binder or matrix to secure in place incorporated particulates, fibres or other reinforcements. They were first developed for structural applications, such as glass-reinforced plastic radar domes on aircraft and graphite-epoxy payload bay doors on the Space Shuttle. They were first used after World War II, and continuing research has led to an increased range of thermoset resins, polymers or plastics, as well as engineering grade thermoplastics.

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Pre-Heating of Thermoplastic Sandwich Materials for Rapid Thermoforming

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