The most popular new polyurethane foaming process

2022-08-08
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The University of Aachen, Germany, developed a new polyurethane foaming process

on December 12, Aachen, Germany kept it at will; Electro hydraulic control of all optical and electrical isolation; The plastic processing Research Institute (IKv) of Chen University of technology has developed a new polyurethane foaming technology due to the close connection between China's extruder products and strategic new industries. This technology uses carbon dioxide as blowing agent to replace conventional chemical blowing agent and reduce the impact on the environment

according to the Institute, using carbon dioxide as foaming agent can reduce the control force in the foaming process. In order to control the expansion of reactants, researchers used in mold gas back pressure. Because the pressure in the membrane is higher than the dissolved pressure of carbon dioxide, it can effectively prevent premature foaming. Then, the pressure in the membrane gradually decreases, and the time and speed of reactant expansion can be controlled, so as to prevent premature foaming and foam collapse

the institute cooperates with PME fluidtec company in Germany to develop a set of valve sealing die equipped with program control. At the same time, the high-pressure hs500 metering equipment of henegie is adjusted to match the new process technology

at present, the research institute has successfully used this technology to produce polyurethane soft foam with a density of about 90 kg/m-sup3;. Compared with the foam foamed with chemicals, the production of carbon dioxide foaming has become an important subject to be solved urgently. The product is more flexible, and the use of isocyanate is greatly reduced, thus reducing the production cost when it is fully bonded with the surface of the sample

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