Preparation method for super macroporous polyurethane reticulated foam plastic

Abstract

The present invention discloses a preparation method for a super macroporous polyurethane reticulated foam plastic. The method comprises the following steps: (1) preparing raw materials, wherein the raw materials comprise the following components: polyol, isocyanate, a silicone foam stabilizer, water, an auxiliary foaming agent, a cross-linking agent, a cell opening agent, a gel catalyst and a colorant; (2) storing the raw materials by a storage tank with a constant temperature freezing device; (3) concurrently adding the raw materials excluding the isocyanate to a mixing device, and uniformly stirring in 3 seconds to obtain a mixed material; (4) opening a isocyanate feeding valve, adding the isocyanate to the mixed material, carrying out high-speed stirring to obtain a mixture; (5) injecting the mixture into a foaming chamber to carry out foaming, closing the foaming chamber after 150-200 seconds, then opening a gas valve to carry out vacuum pumping; (6) removing the formed super macroporous polyurethane reticulated foam body with a reflection-like membrane from the foaming chamber, carrying out a reticulation treatment for the super macroporous polyurethane reticulated foam bodyto form the super macroporous polyurethane reticulated foam plastic. With the present invention, the super macroporous polyurethane reticulated foam plastic can be prepared.

Description

technical field [0001] The invention relates to a preparation method of super-large-pore polyurethane reticulated foam plastic. Background technique [0002] At present, ordinary polyurethane reticulated foam plastics are limited by the formulation process and equipment conditions, and the average diameter of the produced material mesh is generally only 2mm or less. Since the pores of polyurethane reticulated foam are formed by the bubbles generated during the chemical reaction of the liquid mixture from liquid to solid, it can be seen from theory that the larger the bubble, the easier it is to break, and the process is difficult. and the greater the risk. Therefore, it is impossible to make a very large, stable and uniform polyurethane reticulated foam with the existing common polyurethane reticulated foam process. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing super-large-pore polyurethane reticulated foam p...

AI Technical Summary

Problems solved by technology

Therefore, it is impossible to make a very large, stable and uniform polyurethane reticulated foam with the existing common polyurethane reticulated foam process.