| abstract |
The invention relates to a preparation process of a waterproof melamine-based foam and a foaming reactor. In the present invention, a toughening agent is added to the preparation formula of melamine-based foam, so that after the condensation reaction of melamine and formaldehyde, the intermolecular dehydration and cross-linking are carried out, so that the linear molecules are connected with each other to form a network structure, and the strength and the strength of the material are improved. The elasticity makes the product not easy to drop powder. The preparation process also uses a foaming reactor that combines two frequency microwave technologies of 2450Mhz and 915Mhz, which overcomes the shortcomings of single-frequency microwave foaming, and prepares a product with an opening rate of less than 20%, which is waterproof A new type of waterproof melamine-based foam material with high performance, light weight, flame retardant, heat insulation, sound absorption and noise reduction, and easy processing. The foaming reactor of the present invention is provided with a three-stage microwave system. According to the foaming stage of each section, the magnetrons are specially arranged, and the function of the microwave suppressor is added to make the microwaves of different frequencies in the whole reactor. The energy can be distributed evenly and the product forming effect is good. |