Hot press molded melamine foam prepared by hot press molding and preparation method thereof
A thermoforming and foaming technology, which is applied in the field of melamine foam, can solve the problems of affecting the foaming system, performance reduction, mechanical performance and high temperature resistance performance reduction, etc., to ensure recovery and cost, excellent mechanical properties, and reduce production time Effect
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[0027] Prepare the thermoformed melamine foam as follows:
[0028] (1) Preparation of melamine resin: Add 200-500 parts by mass of aldehydes to 0-400 parts by mass of water, adjust the pH to 10-11, heat up to 95°C, add 500-1000 parts by mass of melamine, 1-10 parts by mass of catalyst and 0-100 parts by mass of additives, constant temperature to 102°C, and the end point of the reaction is judged by the cloud point;
[0029] (2) Preparation of melamine foam semi-finished product: mix 100 parts by mass of melamine resin, 1-10 parts by mass of surfactant, 5-40 parts by mass of foaming agent, and 5-20 parts by mass of catalyst to form foaming Liquid, adjust the temperature and control the viscosity, put the emulsified foaming liquid in the microwave equipment, and the foaming liquid is subjected to microwave action to form an open-pore network structure and solidify to obtain a semi-finished melamine foam;
[0030] (3) Preparation of melamine foam products: select 5-30 parts by m...
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