The invention relates to a composite sheet comprising at least two adjacent fibrous monolayers of unidirectionally aligned high tenacity polyethylene fibers, whereby the direction of orientation between the polyethylene fibers of said two fibrous layers differs by at least 80° and up to 90°, the fibers having a tenacity of at least 1.5 N/tex, said fibers being in a matrix comprising a homopolymer or copolymer of ethylene and wherein said homopolymer or copolymer of ethylene has a density as measured according to IS01183 of between 870 to 980 kg/m.sup.3, said composite sheet having an areal density of between 50 and 500 g/m.sup.2 wherein the composite sheet has an areal density normalized in-plane shear force measured at 25° C. evaluated according to the bias extension test method of at least 0.40 N.Math.m.sup.2.Math.g-1 at 10 mm clamp displacement.

A shock wave attenuating material (100) includes a substrate layer (104). A plurality (110) of shock attenuating layers is disposed on the substrate layer (104). Each of the plurality (110) of shock attenuating layers includes a gradient nanoparticle layer (114) including a plurality of nanoparticles (120) of different diameters that are arranged in a gradient from smallest diameter to largest diameter and a graphitic layer (118) disposed adjacent to the gradient nanoparticle layer. The graphitic layer (118) includes a plurality of carbon allotrope members (128) suspended in a matrix (124).

A shock wave attenuating material (100) includes a substrate layer (104). A plurality (110) of shock attenuating layers is disposed on the substrate layer (104). Each of the plurality (110) of shock attenuating layers includes a gradient nanoparticle layer (114) including a plurality of nanoparticles (120) of different diameters that are arranged in a gradient from smallest diameter to largest diameter and a graphitic layer (118) disposed adjacent to the gradient nanoparticle layer. The graphitic layer (118) includes a plurality of carbon allotrope members (128) suspended in a matrix (124).

The protective helmet may comprise a flexible protective helmet that includes a plurality of impact zones that could be particularized to a specific occupation, sport, player-position and/or the individual behavior of a specific player. The protective helmet comprising a plurality of impact mitigation pads coupled to a flexible liner may easily conform to a head of wearer. The different embodiments comprise elements to provide a padded protective helmet that is flexible or semi-flexible, light-weight and adapted to reduce the risk of head trauma due to the multi-layered padded configuration.

A modular helmet interface with a mounting cleat and adhesive layer is provided. In one aspect, a mounting cleat is affixed to a helmet, such as a ballistic helmet, by an adhesive layer, the mounting cleat having a cavity filled with the adhesive used to secure the cleat to the helmet. In a further aspect, the mounting cleat has one or more annular grooves for improving the bond between the cleat and the helmet. In another aspect, a mounting cleat is secured to a helmet by way of a cleat-receiving securing member, the securing member affixed to the helmet by an adhesive layer.

The present invention relates to a (meth)acrylic polymer composition. In particular the present invention it relates to polymeric composition suitable for security glazing. The invention also relates to a process for manufacturing such a polymeric composition suitable for security glazing. More particularly the present invention relates to a bullet resistant (meth)acrylic polymer composition and relates also to a process for preparing such a bullet resistant (meth)acrylic polymer composition and its use in glazing.

A flocked helmet cover pad (FHCP) attachable add-on to a helmet cover includes a central hub and multiple appendages attached to the central hub. The appendages are shaped and arranged to provide additional impact energy absorption properties for a helmet.

A ballistic garment includes a fabric cap and a plurality of flexible ballistic panels. Each of the plurality of flexible ballistic panels has a bottom edge and an acutely pointed head that is spaced from the bottom head. The acutely pointed head of each of the plurality of flexible ballistic panels is positioned adjacent a top portion of the fabric cap. The bottom edge of each of the plurality of flexible ballistic panels positioned adjacent a bottom portion of the fabric cap.

A ballistic garment includes a fabric cap and a plurality of flexible ballistic panels. Each of the plurality of flexible ballistic panels has a bottom edge and an acutely pointed head that is spaced from the bottom head. The acutely pointed head of each of the plurality of flexible ballistic panels is positioned adjacent a top portion of the fabric cap. The bottom edge of each of the plurality of flexible ballistic panels positioned adjacent a bottom portion of the fabric cap.

A modular ceramic armor applique assembly includes ceramic armor element(s) that attach to an outer surface of a ballistic helmet and are held in place by structured envelope(s) to provide protection from rifle-fired projectiles at muzzle velocity. The modular ceramic armor applique assembly includes layers of substrate(s) disposed in one or more locations selected from a group comprising: (a) between the one or more ceramic armor elements and the one or more structured envelopes; (b) between the one or more ceramic armor elements and the outer surface of a ballistic helmet; and (c) between the one or more ceramic armor elements and the inner surface of the ballistic shell.