Composite ballistic resistant laminate
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United States of America Patent
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May 29, 2018
Issued Date -
N/A
app pub date -
May 12, 2015
filing date -
Feb 18, 2015
priority date (Note) -
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Abstract
An impact penetration resistant laminate comprises a plurality of alternating layers of (i) non-fibrous ultra-high molecular weight polyethylene monolayers and (ii) a thermoplastic adhesive, the adhesive having a basis weight of no greater than 5 gsm and a zero-shear-rate viscosity, determined from an oscillating disc rheometer in a frequency sweep between 0.1 rad/s and 100 rad/s, conducted per ASTM D 4440 at 125° C., and calculated from fitting to a Carrea-Yasuda four parameter model, of at least 1500 Pa-s, wherein
- (a) at least 90 percent of the monolayers are arranged such that the orientation of one monolayer is offset with respect to the orientation of an adjacent monolayer, and(b) the modulus of elasticity through the thickness of the laminate is at least 3 GPa.
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