Patent ID: 8858208
Filing Date: 2014-10-14
Classification: B29C,B29K,B29L,B32B,E04C,E06C,Y10T

Abstract:
1. A pultrusion system for producing a ladder rail, the system comprising: a prewetting die wetting an unimpregnated middle mat layer with prewetting resin comprising filler; a former compressing a seven-layer laminate of successively stacked unwet, unimpregnated top and bottom roving, mat, and veil layers onto the wet middle mat layer so that the prewetting resin fully saturates each of the top of bottom roving layers and the middle mat layer; an impregnator compacting the compressed laminate while wetting only the top and bottom mat and veil layers with top coat resin; and a curing die forming the ladder rail at a rate of greater than 5 ft/min by curing the compacted laminate.