FLEXIBLE BALLISTIC COMPOSITE MATERIALS RESISTANT TO ABSORPTION OF LIQUIDS, METHOD OF THEIR MANUFACTURING AND PRODUCTS MADE FROM THEM Russian patent published in 2011 - IPC B32B5/28 B32B27/40 F41H1/02 

FIELD: technological processes.

SUBSTANCE: inventions relate to products made of flexible ballistic composite materials, in particular, to a flexible ballistic resistant bullet-proof vest. The bullet-proof vest represents a flexible armour with higher resistance to absorption of water and other liquids and containing at least one flexible composite material. At the same time the composite material comprises multiple non-woven fibrous layers, which represent a net of aramid fibres with high strength. Fibres are arranged in a matrix, which is a copolymer mixture of polyurethane resins in water. At the same time the following armour properties are demonstated: a) is characterised by V50 value, equal to at least 1920 f/s (585.6 mp/s) in case of ingress of a bullet with weight of 16 grain after it was submerged into sea water for 24 hours at the temperature of 70°F±5°F (21°C±2.8°C); b) preserves at least approximately 85% of V50 after submersion into tap water for 20 hours at the temperature of 70°F±5°F (21°C±2.8°C) when hit with a fragment of a simulated projectile with weight of 17 grain; and c) preserves at least approximately 85% of V50 after submersion into benzine for 4 hours at the temperature of 70°F±5°F (21°C±2.8°C) when hit by a bullet with weight of 16 grain.

EFFECT: increased resistance to absorption of water and other liquids.

3 cl, 2 dwg, 3 tbl, 16 ex