A kind of composite bulletproof material and preparation method thereof
A composite material and fabric technology, applied in the field of composite bulletproof materials and their preparation, can solve problems such as the decline of protective performance, and achieve the effects of high sliding performance, maintaining flexibility, and strong resistance to bullet shearing energy.
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Embodiment 1
[0030] The aluminum sheet / Kevlar fabric / STF impregnated Kevlar fabric composite bulletproof material of the present invention, the surface layer is made of aluminum sheet, the thickness is 1.5mm, and the nail plate structure is used for laying, the middle layer fabric is 4 layers of Kevlar fabric, and the fiber linear density of the fabric is 93TEX. The density is 10.5×10.5 strands / cm, and the weight of the fabric is 201g / m 2 , the bottom layer is 2 layers of STF impregnated Kevlar fabric. STF (shear thickening fluid) is prepared by dispersing nano silicon dioxide in polyethylene glycol, the mass fraction of silicon dioxide is 30%, the viscosity after thickening reaches 1000 Pa.s, and the increase of STF is 50%.
[0031] The preparation method of aluminum sheet / Kevlar fabric / STF impregnated Kevlar fabric composite bulletproof material of the present invention:
[0032] Preparation of STF: Add nano-silica to polyethylene glycol gradually by means of mechanical dispersion, and ...
Embodiment 2
[0040] The 2 layers of Kevlar fabrics impregnated with STF as the bottom layer in Example 1 are replaced with 2 layers of pure Kevlar fabrics, and the surface layer is not covered with aluminum sheets, that is, only 6 layers of pure Kevlar fabrics are used to make Kevlar fabric composite bulletproof materials, and put into Infiltrate into a fabric bag for airtight packaging.
Embodiment 3
[0042] The 4 layers of pure Kevlar fabrics used as the middle layer in Example 1 are replaced by 4 layers of STF-impregnated Kevlar fabrics, and the surface layer is not covered with aluminum sheets, that is, only 6 layers of STF-impregnated Kevlar fabrics are used, and the STF-impregnated Kevlar fabric composite bulletproof material , into impermeable fabric bags for airtight packaging.
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