Process for producing high strength polyethylene film
AssigneeNovameer B.V.
InventorsJan Adolph Dam Backer, Bart Clemens Kranz, Benjamin Slager
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Abstract
Antiballistic or composite products include high strength polyethylene films or tapes produced in a process including the steps of providing a quantity of disentangled polyethylene, applying a pressure of at least 20 bar to the quantity of disentangled polyethylene and a temperature between the α-relaxation temperature and the melting temperature of the disentangled polyethylene Tm PE resulting in a block of disentangled polyethylene, skiving a film or tape off the block of disentangled polyethylene and drawing the film or tape in a single or multi stage drawing step at a total draw ratio of at least 1:20.
Claims8
An antiballistic product comprising films or tapes produced in a process comprising
- providing a quantity of disentangled polyethylene as a powder,
- applying a pressure of at least 20 bar to the quantity of disentangled polyethylene and a temperature between an α-relaxation temperature and a melting temperature of the disentangled polyethylene (Tm PE) resulting in a block of disentangled polyethylene,
- skiving a film or tape off the block of disentangled polyethylene, the film or tape having a solvent content below 0.1%, and
- drawing said film or tape in a single or multi stage drawing step at a total draw ratio of at least 1:50.
A composite product comprising films or tapes produced in a process comprising
- providing a quantity of disentangled polyethylene as a powder,
- applying a pressure of at least 20 bar to the quantity of disentangled polyethylene and a temperature between an α-relaxation temperature and a melting temperature of the disentangled polyethylene (Tm PE) resulting in a block of disentangled polyethylene,
- skiving a film or tape off the block of disentangled polyethylene, the film or tape having a solvent content below 0.1%, and
- drawing said film or tape in a single or multi stage drawing step at a total draw ratio of at least 1:50.
Dependencies are inferred from the claim text.