Saint-Gobain Vetrotex: Pultrusion

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	Description of the process
	Our products available for this process

ultrusion is a continuous process able to produce full or hollow glass reinforced profiles of different shapes. Depending on the design and the shape, glass ratio is from 30 to 70% in weight. Pultruded profiles are used in many applications in electrical, corrosion, building and consumer goods areas.

Glass reinforcement is mainly based on single-end rovings put in a creel, which provide longitudinal reinforcement.

Other reinforcement types are "continuous filament mats" and "fabrics" which provide transversal reinforcement, and also veils for surface aspect.

Several suitable guiding systems between the creel and the curing die allow to preform and place each reinforcement at the right place in the profile.

Glass is impregnated before the die generally with an open bath system.

Fillers are generally introduced in the resin system to give additional properties (fire retardants, cost reduction, ect.)

The three next elements belong to the "pultrusion machine": The curing die shapes and polymerises the impregnated reinforcement.

The solid pultruded profile is therefore clamped and pulled with a continuous belt or reciprocating system.

The ultimate step is a cut-off system to cut the profile at the right length. Typical pultrusion speed with thermoset resin systems is 0.5 - 2 m/minute.


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