System, method and article of manufacture for ballistic shielding
View Patent ↗A composite ballistic shielding material is formed utilizing ribbons of randomly-oriented film, laid up or woven in bias plies. The sheet plies are made narrow strips of PVC films are held side-by-side and rigidly framed as a square, into a thin layer, and then trimmed. The strips may be approximately 0.010″ wide. The formed up layer is then immersed in a low-hardness thermosetting liquid glue and laid down as a first ply. Subsequent plies are made by repeating the same process, and adding the step of rotating the frame to a pre-determined angle before laying down the ply onto the previous ply. When a pre-determined number of layers or a desired thickness is achieved, the lay-up is transferred to a press for curing into panels. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
1. A system of manufacture of fiberless composite ballistic shielding comprising:
forming a plurality of individual layers, each said layer comprising a plurality of film strips oriented side by side and affixed with a thermosetting adhesive, wherein each said plurality of narrow film strips are less than approximately 0.010″ in width;
orienting adjacent said individual layers at a bias angle and to a pre-determined number of layers or a desired thickness;
applying thermosetting adhesive between said adjacent said individual layers; and
pressing and curing said oriented plurality of layers to form a panel.
2. The system of claim 1 , wherein the film forming said film strips has a modulus of elasticity less than 25%.
3. The system of claim 1 further adapted for automated control, wherein said film strips are formed from a film roll pressed between two matched plates, each with an array of multiple aligned cutting edges that, together, shear the film into ribbons.
4. The system of claim 1 , further comprising incorporating functional additive materials between plies.
5. The system of claim 4 , wherein said functional additive material is selected from the group consisting of: flame-retardants; and, carbon nanotubes suspended in solution.
6. A system of manufacture of fiberless composite ballistic shielding comprising:
forming a plurality of individual layers, each said layer comprising a plurality of film strips oriented side by side and affixed with a thermosetting adhesive, wherein each said plurality of narrow film strips are less than approximately 0.010″ in width;
orienting adjacent said individual layers at a bias angle and to a pre-determined number of layers or a desired thickness;
adding a functional additive material selected from the group consisting of: flame-retardants; and, carbon nanotubes suspended in solution;
applying thermosetting adhesive between said adjacent said individual layers; and
pressing and curing said oriented plurality of layers to form a panel.