Process for the manufacture of a ballistic-resistant moulded article
AssigneeDsm N.V.
InventorsMartinus Johannes Jacobs, Jean Hubert Beugels, Marc Blaauw
Life of this patent
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Abstract
The invention relates to a process for the manufacture of a ballistic-resistant molded article in which a stack of monolayers is formed, each monolayer containing unidirectionally oriented reinforcing fibers and at most 30 mass % of a plastic matrix material, the reinforcing fibers being highly-drawn polyethylene fibers, and with the fiber direction in each monolayer being rotated with respect to the fiber direction in an adjacent monolayer, the stack then being compressed at a pressure of more than 25 MPa and a temperature between 125 and 150° C., and the plastic matrix material having a 100% modulus of at least 3 MPa.
Claims6
Process for the manufacture of a ballistic-resistant moulded article in which a stack of monolayers is formed, each monolayer containing unidirectionally oriented reinforcing fibres and at most 30 mass % of a plastic matrix material, the reinforcing fibres being highly-drawn polyethylene fibres, and with the fibre direction in each monolayer being rotated with respect to the fibre direction in an adjacent monolayer, the stack then being compressed at elevated temperature at a given compression pressure, characterized in that the plastic matrix material has a 100% modulus of at least 3 MPa and the stack is compressed at a pressure of more than 25 MPa and a temperature between 125 and 150° C.
Ballistic-resistant moulded article comprising a stack of monolayers, each monolayer containing unidirectionally oriented reinforcing fibres and at most 30 mass % of a plastic matrix material, the reinforcing fibres being highly-drawn polyethylene fibres, and with the fibre direction in each monolayer being rotated with respect to the fibre direction in an adjacent monolayer, characterized in that the plastic matrix material contains polyurethane and the moulded article has an SEA at 80° C. against AK47 bullets that is at least 100 J/(kg/m2).
Dependencies are inferred from the claim text.