Besides the resin, roving and mat, the fiberglass pultrusion still needs some auxiliary materials:
Initiator: MEKP, TBPB, BPO, Lm-P, TBPO, BPPD, P-16
Curing agent: commonly used are acid anhydride, amine, imidazole curing agent.
Colorant: pultrusion of colorants usually appears in the form of pigment paste.
Packing / Filler: packing can reduce product shrinkage, improve the product dimension stability, surface roughness, smoothness and flat or no light; effective control resin viscosity; can meet different performance requirements, to improve the electrical conductivity and thermal conductivity, wear resistance, etc., Most of the filler can improve the impact strength of the composite and the compressive strength, but it can not improve the tensile strength; It can improve the coloring effect pigments; some filler has excellent light stability and resistance to chemical corrosion; It can reduce cost. Selection of filler particle size is best to have a gradient, in order to achieve the best effect use. Now there are surface treatment of fillers to increase the amount of.
Release agent: release agent has the extremely low surface energy, can evenly wetted surface of mould, demoulding effect is reached. Demoulding effect is good is the main condition to ensure the smooth progress of the pultrusion process.