Super-absorption high-resilience foaming material as well as preparation method and application thereof

Abstract

The invention provides a super-absorption high-resilience foaming material which is formed by a foaming composition, wherein the foaming composition comprises 10-35 parts by weight of a copolymer of isoolefin and linear-chain-end olefin; 40-60 parts by weight of an ethylene-vinyl acetate copolymer; 5-20 parts by weight of a polyolefin elastomer; 5-10 parts by weight of ethylene propylene diene monomer; 5-15 parts by weight of a styrene polymer; 0.1 to 1 part by weight of a peroxide cross-linking agent; 1-5 parts by weight of a foaming agent; and 1-5 parts by weight of a foaming aid; wherein the carbon atom number of the isoolefin is 5-8; and the number of carbon atoms of the straight-chain end olefin is 2-4. Compared with the prior art, after a copolymer of a stress absorption polymer isoolefin and a straight chain end olefin with relatively large steric hindrance and a high-elastic polymer are blended and foamed, the high-elastic damping material which has excellent stress absorbability, stress relaxation and damping effects at room temperature is obtained, wherein the rebound rate of the foaming material is kept to be greater than 50%.

Description

technical field [0001] The invention belongs to the technical field of foaming materials, and in particular relates to a superabsorbent and high-impact rebounding foaming material, its preparation method and application. Background technique [0002] Newton's third law states that when a force is exerted on something, there must be a force of the same magnitude and opposite direction, which is called a reaction force. Compared with running, due to the relationship of gravity when landing, it will give the ground a vertical downward impact force, and the ground will give us an upward reaction force. This reaction force will be eliminated by the cushioning of muscles and joints. However, if the impact force is too large or the buffer is improper, this reaction force may cause damage to bones and joints. In the course of exercise, as the movement speed varies, the foot will be subjected to a counter-impact force of 1.3 to 3 times the magnitude of gravity. The faster the movem...

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Problems solved by technology

[0007] It can be seen that in published patents or documents, if the existing EVA foam shock-absorbing material is added to improve the shock-absorbing performance of the foamed material with NBR / PVC, or to add SBR / PVC to improve the shock-absorbing performance of the foamed material, it will lead to The resilience performance of the foaming material is greatly reduced, and the rebound rate is lower than 16%, which does not meet the high resilience performance requirements of current consumers for sports shoes, and the carbon in the molecular structure of PVC belongs to the tertiary carbon group. In the cross-linking system, the degradation rate of molecular chain breakage is greater than the cross-linking speed of the molecular chain, so PVC cannot be cross-linked in the formula, resulting in a decrease in the mechanical properties of the final foamed material

If the addition of silicon boron shear thickening gel improves the cushioning and shock absorption performance, although the rebound performance is maintained, from the falling ball impact test data of the embodiment and the comparative example, the reduction after adding the silicon boron shear thickening gel The shock effect is not obvious, and the silicon-boron shear thickening gel in the system cannot produce foaming and crosslinking like EVA, and it only acts as a filler in the formula, resulting in a great decrease in the mechanical properties of the final foaming material. The tensile strength is only about 1.0MPa, which cannot meet the basic requirements of the mechanical properties of sports shoes

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