A kind of sponge for body armor and preparation method thereof

Abstract

The invention discloses sponge for a body armor and a preparation method of the sponge. The sponge comprises the following components in parts by weight: 25-40 parts of polyether polyol, 15-25 parts of polymer polyol, 40-50 parts of slow rebound polyether, 15-25 parts of TDI, 1.5-4 parts of a catalyst, 2-4 parts of auxiliary agents, 0.5-1 part of silicone oil and 0.4-0.7 parts of water, wherein the auxiliary agents comprise a tension agent and a toughening agent. The method comprises the following steps: proportionally mixing polyether polyol, polymer polyol, slow rebound polyether, a catalyst, auxiliary agents, silicone oil and water, stirring for 10-20 seconds at the rotating speed of 50000 r / min, carrying out high-pressure atomization injection on TDI, stirring for 10 seconds at a highspeed to uniformly mix the raw materials, and carrying out reaction foaming to obtain the sponge for a body armor. The bulletproof sponge provided by the invention has very high density, tensile strength and tearing strength, the pore diameter of the sponge is compact and fine, resilience is slow, strong instantaneous impact force can be resisted, the bulletproof sponge has an excellent buffer effect, and when the bulletproof sponge is used as a buffer layer of a body armor, blunt damage to the body armor is used can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of sponges, in particular to a sponge for bulletproof vests and a preparation method thereof. Background technique [0002] The body armor is mainly composed of two parts: the jacket and the bulletproof layer. The jacket is usually made of chemical fiber fabric; the bulletproof layer is made of metal (special steel, aluminum alloy, titanium alloy), ceramic sheet (corundum, boron carbide, silicon carbide, alumina), glass fiber reinforced plastic, nylon, Kevlar, ultra-high molecular weight polymer Vinyl fibers, liquid protective materials and other materials form a single or composite protective structure. The bulletproof layer can absorb the kinetic energy of the warhead or the shrapnel, and has a significant protective effect on the low-speed warhead or the shrapnel, which can effectively prevent the penetration of the warhead and protect the personnel from the penetrating damage of the projectile. However...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, by adding a buffer layer to reduce blunt trauma behind body armor, elastic materials such as rubber, elastic fiber or natural cotton materials are usually used as buffer layers, but these materials either have insufficient flexibility to make the wearer uncomfortable. Either the tensile strength is not enough to make the depression deform greatly, or when the flexibility and tensile strength are enough, the thickness is too thick, which reduces the wearer's flexibility

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