Impact resistant composite article
AssigneeE. I. Du Pont de Nemours and Company
InventorsBryan Benedict Sauer, Jeffrey Alan Hanks, William George Kampert, Brian Charles West, William Charles Walker
Life of this patent
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Abstract
An impact resistant composite article has two or more layers of ballistic fabric and ionomer layers disposed between the fabric layers. The ionomer is highly neutralized so that it has essentially no melt flow. A process also for making such a composite article that involves deposition of an aqueous colloid of the ionomer onto the fabric, followed by drying.
Claims19
An impact resistant composite article comprising one or more stacks layered together, each stack comprising two or more fibrous layers with a non-melt-processable ionomer disposed between at least two of the fibrous layers in which the non-melt-processable ionomer is at least 85% neutralized based on the total number of equivalents of carboxylic acid moieties in the ionomer and has a zero melt flow index at 190° C. melt flow test of ASTM D1238, and wherein
- (i) the weight fraction of solid ionomer in the multilayer composite article is between 5 and 16%, and
- (ii) the ionomer is neutralized with an ion selected from the group consisting of sodium, potassium, lithium, beryllium, magnesium, calcium, strontium, barium, tin, lead, aluminum, titanium, tantalum, cerium and combinations thereof.
An impact resistant composite article comprising one or more stacks layered together, each stack comprising two or more fibrous layers with a non-melt-processable ionomer disposed between at least two of the fibrous layers in which the non-melt-processable ionomer is at least 100% neutralized based on the total number of equivalents of carboxylic acid moieties in the ionomer and has a zero melt flow index at 190° C. melt flow test of ASTM D1238, and wherein
- (i) the weight fraction of solid ionomer in the multilayer composite article is between 5 and 16% and the weight fraction of fiber is between 84 and 95%, and
- (ii) the ionomer is neutralized with an ion selected from the group consisting of sodium, potassium, lithium, beryllium, magnesium, calcium, strontium, barium, tin, lead, aluminum, titanium, tantalum, cerium and combinations thereof.
Dependencies are inferred from the claim text.