Abrégé

An impregnation die, comprising: a housing including an internal processing chamber and a pultrusion aperture; and a nozzle carried on said housing, said nozzle including an opening having an inlet end, an outlet end and a central axis, said inlet end being in communication with said processing chamber by means of said pultrusion aperture; said impregnation die being characterized by said opening including a first tapered section adjacent said inlet end, a first straight section downstream from said first tapered section, a second tapered section downstream from said first straight section and a second straight section downstream from said second tapered section and adjacent said outlet end.

Classes IPC  ?

• B29B 15/12 - Revêtement ou imprégnation d'agents de renforcement de longueur indéfinie
• B29C 70/52 - Pultrusion, c.-à-d. façonnage et compression par traction continue à travers une matrice

Abrégé

A sizing composition containing an epoxy film former, a urethane film former, a silane package that includes an aminosilane coupling agent and an epoxy silane coupling agent, a cationic lubricant, a non-ionic lubricant, an antistatic agent, and at least one acid is provided. The epoxy resin emulsion includes a low molecular weight liquid epoxy resin and one or more surfactants. The epoxy resin preferably has an epoxy equivalent weight from 185 - 192. The sizing composition may optionally contain a methacryloxy silane. The sizing composition may be used to size glass fibers used in filament winding applications to form reinforced composite articles with improved mechanical properties, wet tensile properties, improved resistance to cracking, and improved processing characteristics.

Classes IPC  ?

• C03C 25/26 - Composés macromoléculaires ou prépolymères
• C03C 25/32 - Composés macromoléculaires ou prépolymères obtenus autrement que par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carbone
• C03C 25/36 - Résines époxy
• C08L 63/00 - Compositions contenant des résines époxyCompositions contenant des dérivés des résines époxy

Abrégé

A chopped strand mat formed of bundles of dielectrically dried reinforcing fibers and bonding fibers is provided. The reinforcing fibers may be formed as bundles of wet reinforcing fibers with a bundle tex of about 10 to about 500. The reinforcing fibers may be formed of a single chop length of about 1 to about 1 1/2 inches (about 2.54 to about 3.81 cm) or a multi-chop length of fibers of about 1/2 to about 2 inches (about 1.27 to about 5.08 cm). The bonding materials may be any thermoplastic or thermosetting material having a melting point less than the reinforcing fiber. The chopped strand mat may be formed by dielectrically drying the wet reinforcement fibers, blending the reinforcement and bonding fibers, bonding the reinforcement and bonding fibers to form a chopped strand mat, compacting the mat, cooling the mat, and winding the mat into a continuous roll. The chopped strand mat contains a uniform or nearly uniform distribution of bonding fibers and bundles of dried reinforcement fibers.

Classes IPC  ?

• B29C 70/12 - Façonnage de matières composites, c.-à-d. de matières plastiques comprenant des renforcements, des matières de remplissage ou des parties préformées, p. ex. des inserts comprenant uniquement des renforcements, p. ex. matières plastiques auto-renforçantes des renforcements fibreux uniquement caractérisées par la structure des renforcements fibreux utilisant des fibres courtes, p. ex. sous forme d'un mat
• B29B 11/16 - Fabrication de préformes caractérisées par la structure ou la composition comprenant des charges ou des agents de renforcement
• C03B 37/16 - Découpage ou sectionnement
• D04H 13/00 - Autres non-tissés
• D04H 1/42 - Non-tissés formés uniquement ou principalement de fibres coupées ou autres fibres similaires relativement courtes à partir de voiles ou couches composés de fibres ne possédant pas des propriétés cohésives réelles ou potentielles caractérisés par l'emploi de certaines sortes de fibres dans la mesure où cet emploi n'a pas d'influence prépondérante sur la consolidation du voile