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US 2020/0139587 A1Published application
Strands powdered by electrostatic method
AssigneePorcher Industries
InventorsRomain PELLET, Grégory MERLE
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AssigneePorcher Industries
InventorsRomain PELLET, Grégory MERLE
Estimating the term…
The invention relates to a method and facility for manufacturing a tape of reinforcement filaments impregnated by a polymer matrix, as well as a tape produced thereby, said tape having a constant width across the entire length thereof, wherein the filaments extend in a direction parallel to the length of the tape, from a strand of filaments coming from a feeding reel. The method including steps and units that make it possible to manage the unwinding tension of the strand, to guide the strand on the axis of the machine, to manage the width of the strand, to deposit the polymer on the strand by electrostatic powdering, with a polymer weight ratio of around 20% to around 75% to melt the polymer, to calibrate the width and thickness of the tape and to collect the tape on the storage reel.
A continuous tape formed with unidirectional fibers of an inorganic material and with a thermoplastic polymer matrix, said tape being impregnated to the core of said thermoplastic polymer, comprising a polymer level comprised between about 30% and about 75%, based on the weight of the tape, and having a constant width comprised between about 2 mm and about 75 mm, with a standard deviation comprised between 0.02 and 0.15 mm, over a length in a single piece greater than or equal to 100 m.
A continuous tape formed with unidirectional fibers of an inorganic material and with a thermoplastic polymer matrix, said tape being impregnated with said thermoplastic polymer, comprising a polymer level comprised between about 25% and about 75% based on the weight of the tape, comprising inside filaments which are not taken in the polymer in an amount of 20 to about 50% of the total of the filaments of the tape and the polymer forms an outer continuous sheath of the tape.
A facility comprising:
Dependencies are inferred from the claim text.