Pultrusion allows the production of a continuous composite profiles. Here, the reinforcing materials are impregnated with resin and drawn through a heated metal die. The final profile reflects the shape of the die.
First, make a bundle of the dry reinforcing material in the fiberglass feed section. Then, impregnate the package with the binder and run it through the hot die. Using this method, no air enters the material.
The excess resin flows down to the tray. After the die, cool down the profile and cut it into pieces of the required length.
Modifying the direction of the fibres, a profile with the required physical and mechanical properties can be produced. The right choice of binder will increase the chemical, heat, impact, and fatigue resistance of the material.
Examples of application:
1. U-beams and I-beams 2. railings and boardwalks 3. traffic sign supports 4. reinforcement for concrete 5. crash barrier and sound screen elements 6. cable troughs
Main suppliers:
Basic materials:
DISTITRON
183
Isophthalic resin. Was developed for the purposes of gelcoat production, therefore fills well and ensures the right profile colour when dyed.
DISTITRON
1629
Isophthalic resin, good physical and mechanical properties. High speed of drawing.
MARBOLUBE
U100
Release agent for pultrusion. Up to 1.5% added to resin. Delivered in 200 kg metal drums.
EDR 2400/
4800/9600
Direct roving for pultrusion with universal size. It is well wetted and does not break under longitudinal tension.
CF PIGMENT
Pigment pastes with the required RAL colour. The pastes are dissolved in polyether resin and therefore mix easily with the resin.
Advantages of the technique:
1. automated control of production processes 2.low cost of raw materials, high productivity 3. high quality of the final product due to the correct direction of the fibres and high contents of the glass material
Disadvantages of the technique:
1. high price of equipment 2. limited range of products
