Ultra high molecular weight polyethylene multifilament yarn
AssigneeDsm IP Assets B.V.
InventorsJacobus Johannes MENCKE, Johannes Hendrikus Marie HEIJNEN, Harm VAN DER WERFF
Life of this patent
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Abstract
Multifilament yarn containing n filaments are provided, wherein the filaments are obtained by spinning an ultra-high molecular weight polyethylene (UHMWPE), said yarn having a tenacity (Ten) as expressed in cN/dtex of Ten(cN/dtex)=f×n−0.05×dpf −0.15, wherein Ten is at least 39 cN/dtex, n is at least 25, f is a factor of at least 58 and dpf is the dtex per filament.
Claims20
A panel comprising a plurality of sheets, wherein each sheet comprises at least 2 monolayers, wherein each of the monolayers comprises unidirectionally aligned yarn spun from an ultra-high molecular weight polyethylene (UHMWPE), wherein the yarn has a tenacity (Ten) as expressed in cN/dtex according to Formula 1:
- Ten(cN/dtex)=f×n−0.05×dpf−0.15 (Formula 1)
- wherein Ten is at least 39 cN/dtex, n is at least 50, f is a factor of at least 58 and dpf is the dtex per filament.
A rigid panel comprising:
- a stack of sheets, wherein
- each of the sheets comprises at least 2 monolayers, wherein
- each of the monolayers comprises unidirectionally aligned yarn spun from an ultra-high molecular weight polyethylene (UHMWPE), wherein the yarn has a tenacity (Ten) as expressed in cN/dtex according to Formula 1:
- Ten(cN/dtex)=f×n−0.05×dpf−0.15 (Formula 1)
- wherein Ten is at least 39 cN/dtex, n is at least 50, f is a factor of at least 58 and dpf is the dtex per filament, and wherein
- the rigid panel has (i) a flexural strength of at least 10 MPa as measured before impact and (ii) an Eabs (J/[kg/m2]) of at least 170 against an AK47 FMJ MSC projectile as determined for an areal density of the panel of about 15.5 kg/m2.
A flexible panel comprising:
- a stack of uncompressed sheets, wherein
- each of the sheets comprises at least 2 monolayers, wherein
- each of the monolayers comprises unidirectionally aligned yarn spun from an ultra-high molecular weight polyethylene (UHMWPE), wherein the yarn has a tenacity (Ten) as expressed in cN/dtex according to Formula 1:
- Ten(cN/dtex)=f×n−0.05×dpf−0.15 (Formula 1)
- wherein Ten is at least 39 cN/dtex, n is at least 50, f is a factor of at least 58 and dpf is the dtex per filament.
Dependencies are inferred from the claim text.