Preparation method of polyurethane foam material

Abstract

The embodiment of the invention discloses a preparation method of a polyurethane foam material and a foaming gun. The preparation method comprises: mixing combined polyether and cyclopentane to prepare mixture; and mixing the mixture, foaming additives and polyisocyanate in the foaming gun for reaction to generate foam, thereby obtaining the polyurethane foam material. The polyurethane foam material is prepared according to the principle of the high-pressure foaming gun and can be freely prepared for use in areas near the production place due to the flexibility in operation of the high-pressure foaming gun, particle precipitation can be reduced, and no long-distance transportation pipeline is needed for transportation. Moreover, the foaming additives can become ultra-fine crystal nucleus during foraming of polyurethane to promote chemical reaction of the polyisocyanate and combined polyether to form a fine porous structure, the radiation factor of the polyurethane foam material is reduced, and the prepared polyurethane foam material has a lower thermal conductivity coefficient.

Description

technical field [0001] The invention relates to the technical field of foam materials, in particular to a preparation method of polyurethane foam materials. Background technique [0002] Environmental protection, energy saving and sustainable development are the themes of the development of all countries in the world today. In the field of refrigerators in the home appliance industry, with the continuous progress of energy-saving technology, the improvement of the energy consumption level of refrigerator products will be a bottleneck affecting the development of the refrigerator field. [0003] The heat transfer of the polyurethane foam material used on the refrigerator box mainly comes from three aspects: gas heat transfer, polyurethane matrix heat transfer and foam radiation heat transfer, of which gas heat transfer accounts for 50%, polyurethane matrix heat transfer accounts for 20%, Foam radiative heat transfer accounts for 30%. The heat transferred by foam radiation c...

AI Technical Summary

Problems solved by technology

At present, the polyurethane foaming system commonly used by enterprises is generally a ground tank type combined polyether and cyclopentane storage method, that is, the foaming additive is sent to the cyclopentane ground tank by the delivery pump, and the circulating pump performs repeated self-circulation. Mix the additive and cyclopentane evenly, and then send it to the static mixer through the pipeline. At the same time, the prepared combined polyether is also delivered to the static mixer. After the three are mixed evenly, they are sent to the high-pressure generator through the pipeline. In the foaming equipment, the ground tank device used in this storage method is large in volume, far away from the production site, and the transportation pipeline is long, which requires a long foaming system pipeline for transportation. In addition, cyclopentane, additives, and combined polyether are uniformly formed by stirring The storage time of the emulsion should not exceed two days. After two days, the emulsified particles of the FA-188 additive will precipitate seriously, so the performance cannot meet the needs of flexible production.

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