Energy absorbing blends
AssigneeDesign Blue Limited
InventorsPhilip Charles Green, Richard Martin Palmer
Life of this patent
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Abstract
A composite material which is elastic, which exhibits a resistive load under deformation which increases with the rate of deformation, which is unfoamed or foamed, comminuted or uncomminuted and which comprises i) a first polymer-based elastic material and ii) a second polymer-based material, different from i), which exhibits dilatancy in the absence of i) wherein ii) is entrapped in a solid matrix of i), the composite material being unfoamed or, when foamed, preparable by incorporating ii) with i) prior to foaming.
Claims35
A molded article comprising an un-comminuted composite material which is elastic, exhibits a resistive load under deformation which increases with the rate of deformation, and comprises:
- i) a first polymer-based elastic material comprising a polymer selected from the group consisting of elastomeric polyurethanes and synthetic thermoplastic elastomers;
- and
- ii) a second polymer-based material, comprising a polymer different from the polymer of i), which exhibits dilatancy in the absence of i) wherein ii) is entrapped in a solid matrix of i),
- the composite material being un-foamed and,
- the first material i) and second material ii) being in intimate admixture;
- wherein the second material ii) forms from 5% to 80% by volume of the composite material.
A molded article in the form of a sheet, film, filament, or fiber, said molded article comprising a composite material which is elastic, exhibits a resistive load under deformation which increases with the rate of deformation, and comprises:
- i) a first polymer-based elastic material comprising a polymer selected from the group consisting of ethylene-vinyl acetate (EVA), elastomeric polyurethanes, and synthetic thermoplastic elastomers;
- and
- ii) a second polymer-based material, comprising a polymer different from the polymer of i), which exhibits dilatancy in the absence of i) wherein ii) is entrapped in a solid matrix of i),
- the composite material being un-foamed and,
- the first material i) and second material ii) being in intimate admixture;
- wherein the second material ii) forms from 5% to 80% by volume of the composite material.
An impact protection system associated with a rigid component, a semi-rigid component, or a textile layer, the impact protection system including a molded article comprising a composite material which is elastic, exhibits a resistive load under deformation which increases with the rate of deformation, and comprises:
- i) a first polymer-based elastic material comprising a polymer selected from the group consisting of ethylene-vinyl acetate (EVA), elastomeric polyurethanes, and synthetic thermoplastic elastomers;
- and
- ii) a second polymer-based material, comprising a polymer different from the polymer of i), which exhibits dilatancy in the absence of i) wherein ii) is entrapped in a solid matrix of i),
- the composite material being un-foamed;
- and
- the first material i) and second material ii) being in intimate admixture;
- wherein the second material ii) forms from 5% to 80% by volume of the composite material.
A shaped article in the form of a sheet, film, filament or fiber comprising a composite material which is elastic, exhibits a resistive load under deformation which increases with the rate of deformation, and comprises:
- i) a first polymer-based elastic material comprising a polymer selected from the group consisting of ethylene-vinyl acetate (EVA), elastomeric polyurethanes, and synthetic thermoplastic elastomers;
- and
- ii) a second polymer-based material, comprising a polymer different from the polymer of i), which exhibits dilatancy in the absence of i) wherein ii) is entrapped in a solid matrix of i),
- the composite material being un-foamed and,
- the first material i) and second material ii) being in intimate admixture;
- wherein the second material ii) forms from 5% to 80% by volume of the composite material.
An impact protection system including a shaped article comprising a composite material which is elastic, exhibits a resistive load under deformation which increases with the rate of deformation, and comprises:
- i) a first polymer-based elastic material comprising a polymer selected from the group consisting of ethylene-vinyl acetate (EVA), elastomeric polyurethanes, and synthetic thermoplastic elastomers;
- and
- ii) a second polymer-based material, comprising a polymer different from the polymer of i), which exhibits dilatancy in the absence of i) wherein ii) is entrapped in a solid matrix of i),
- the composite material being un-foamed and,
- the first material i) and second material ii) being in intimate admixture;
- wherein the second material ii) forms from 5% to 80% by volume of the composite material;
- and
- wherein impact protection system is associated with a rigid component or a semi-rigid component.
An impact protection system including a shaped article comprising a composite material which is elastic, exhibits a resistive load under deformation which increases with the rate of deformation, and comprises:
- i) a first polymer-based elastic material comprising a polymer selected from the group consisting of ethylene-vinyl acetate (EVA), elastomeric polyurethanes, and synthetic thermoplastic elastomers;
- and
- ii) a second polymer-based material, comprising a polymer different from the polymer of i), which exhibits dilatancy in the absence of i) wherein ii) is entrapped in a solid matrix of i),
- the composite material being un-foamed and,
- the first material i) and second material ii) being in intimate admixture;
- wherein the second material ii) forms from 5% to 80% by volume of the composite material;
- and
- wherein impact protection system is associated with textile layer.
Dependencies are inferred from the claim text.