Abstract: A flow medium for distributing a resin in vacuum assisted resin transfer molding processes for manufacturing long, thick and more complex composite parts comprises a flow channel encapsulated by a layer of fibrous material, which provides a high volume flow of resin distributed in a timely manner in the mold.

Abstract: A ventilation system and a method for producing the ventilation system are provided. The ventilation system includes an air vent including an entangled core and a separation layer formed on a side of the entangled core. The entangled core includes air space. A method for producing the ventilation system includes bonding the entangled core to a surface of the separation layer to form an air vent.

Abstract: A roof ridge vent mat for installation overlying an open roof ridge to provide ventilation to a space beneath a roof is provided. The ridge vent mat is a continuous elongate material of randomly convoluted polymeric filaments having an openwork upper face, an openwork lower face, a plurality of hollow recesses extending into the mat and opening into the lower face, and opposite longitudinally extending openwork side edges. The openwork upper face is formed of randomly convoluted filaments formed to provide a relatively flat surface of sufficient density to catch heads of fasteners. The plurality of hollow recesses is defined by a plurality of upstanding openwork walls of convoluted filaments that extend from the upper face to the lower face of the mat. The upstanding openwork walls are arranged in a latticework structure such that no unobstructed passageway extent through the mat through which wind-blown rain and snow can freely pass into the side edges of the mat and laterally pass through the mat.

Abstract: A flow medium for distributing a resin in vacuum assisted resin transfer molding processes for manufacturing long, thick and more complex composite parts comprises a flow channel encapsulated by a layer of fibrous material, which provides a high volume flow of resin distributed in a timely manner in the mold.

Abstract: A roof ridge vent for installation overlying an open roof ridge to provide ventilation to a space beneath a roof is provided. The ridge vent is a continuous, elongate mat of randomly convoluted polymeric filaments having an openwork upper face, an openwork opposite lower face, a plurality of hollow recesses extending into the mat and opening into the lower face, and opposite longitudinally-extending openwork side edges. The openwork upper face is formed of randomly convoluted filaments formed to provide a relatively flat surface of sufficient density to catch heads of fasteners. The plurality of hollow recesses is defined by a plurality of upstanding openwork walls of convoluted filaments that extend from the upper face to the lower face of the mat. The upstanding openwork walls are arranged in a latticework structure such that no unobstructed passageways extend through the mat through which wind-blown rain and snow can freely pass into the side edges of the mat and laterally pass through the mat.