3/30/2023 0 Comments Dons quiri midsole tech![]() ![]() ![]() The nitrogen injection foaming material mentioned here is not a physical air-cushion shoe, but refers to injecting liquid nitrogen into the TPU before foaming. This is the reason why Brooks and Anta's shoe sizes of certain models have been claiming the blessing of nitrogen technology. Secondly, the critical pressure and temperature of supercritical CO2 and N2 are relatively mild, easy to achieve, and have good solubility for polymers, strong diffusion ability, and easy control. Supercritical foaming technology generally uses CO2 or N2 as a physical foaming agent, because CO2 and N2 are chemically stable and inexpensive, non-toxic and harmless, and are environmentally friendly. Rapid cooling to complete the shaping of the cell structure. The gas quickly diffuses into the bubble core, and the bubble gradually grows Ĥ. A sudden temperature rise or a sudden pressure drop makes the gas in the homogeneous system reach a supersaturated state, that is, a thermodynamically unstable state, thereby causing bubble nucleation ģ. ![]() Make the supercritical fluid enter the polymer matrix to reach a saturated state to form a polymer/gas homogeneous system Ģ. Its foaming process can be divided into 4 stages:ġ. Filling the entire space, its viscosity and diffusion coefficient are closer to that of a gas, but its density is similar to that of a liquid. Supercritical fluid is a structure between liquid and gas. The principle of microcellular foaming of supercritical fluid is as follows: the liquid whose temperature and pressure are above the critical point is called supercritical fluid. The microporous structure here is actually a popcorn-like structure understood by runners. Supercritical fluid foaming technology is an effective method for preparing microporous plastics that has been rapidly developed in the past 20 years. įoaming the material is an effective way to reduce its density and expand its functional application.įoam materials have the characteristics of light weight, heat insulation, sound absorption, shock resistance, high specific strength and low price, and are widely used in the fields of daily necessities packaging, sports equipment, medical equipment accessories, automobile industry and construction. Today we will talk about this technology and what kind of supercritical foam materials are used by various running shoe brands. Now there is a midsole technology that has become mainstream in the industry - this is the so-called supercritical foam material. In the past, we could only see popcorn-like materials on Asdas Boost series running shoes, but now, in addition to Adi, more and more international and domestic brand running shoes seem to be using popcorn-based midsole, behind which is the midsole The improvement in the performance of running shoes brought about by the advancement of material technology. ![]()
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