What is the best glass fiber chopped felt for epoxy resin?

Preferred, powder type short cut felt.

Powder type short cut felt

Epoxy resin adhesive can be combined with most glass fiber short cut felt, but powder short cut felt has a better effect because the surface treatment of glass fiber uses powder adhesive. The traditional emulsion chopped felt is "emulsion bonded", which relies on the styrene and solvent in polyester resin to decompose its adhesive, but there is no dissolved component in epoxy resin.

Therefore, the powder chopped felt is easily damaged by flowing epoxy resin adhesive, making it easy to accumulate layers and improve interlayer adhesion.