Melt-spun high-strength polyethylene fibre
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United States of America Patent
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Dec 12, 1995
Grant Date -
N/A
app pub date -
Dec 16, 1994
filing date -
May 29, 1992
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Abstract
The invention concerns a high strength polyethylene fibre, which is prepared by melt spinning polyethylene having a high density through a spinnerette, by cooling the fibre coming out from the spinnerette and by stretching the fibre obtained at 50.degree.-150.degree. C. The polyethylene used in the melt spinning is a homopolymer of ethylene having a weight average molecular weight M.sub.w between 125000-175000 g/mol, a number average molecular weight M.sub.n between 26000-33000 g/mol, polydispersity (M.sub.w /M.sub.n) below 5 and the density higher than 955 g/dm.sup.3. The stretching degree in the drawing step is at least 400%.
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