Проаналізовано практичне застосування розроблених енергоефективних технологічних засад одержання препрегів для базових процесів їх одержання, а саме змішування, просочування волокнистих наповнювачів та дозованого нанесення на них епоксидних зв’язуючих, із використанням ультразвуку.
It was stated that the basic processes of impregnation and dosed application are the important parts of the production of prepreg for polymer composite materials (PCM). This is because the quality of the impregnation is influenced by such factors as the presence or absence of air inclusions (so-called "bottle effect") in the structure of the impregnated fibrous filler during its impregnation, the homogeneity and the viscosity of the polymeric binder, good surface wettability of fibrous filler and so on.
The essence of the developed energy-efficient technological foundations is based on the integrated use of ultrasonic for the basic processes of manufacture of prepregs to overcome the above said drawbacks in their preparation.
Studies have shown that the effective effect of ultrasonichelps to improve the homogenization of the polymer binder, activation of fiberfill surface to improve its wettability with the polymer binder drainage structures fiberfill right before impregnation and to increase the productivity of the process of impregnation and dosed application of polymer binder by increasing the speed of a fiber-fill drawing with improving of properties of the final solidified PCM.
Furthermore, it was found out that the use of ultrasonic exposure to the impregnated fibrous filler in the bath and also to already impregnated fibrous filler may be regarded as an effective method for automatically maintaining of the required amount of containing of the binder polymer in the impregnated fibrous filler.
In addition, due to the action of ultrasonic reduces cumulative time of receipt of the prepregs, which ultimately also contributes to energy saving in the preparation of prepregs.
The result of the application of the developed technological bases and the equipment is the increase of productivity of the impregnation processes and dosed application of polymer binder, i.e. speed of drawing of the material and speed of removal of excess polymer binder in the preparation of a homogeneous impregnated material with virtually no air pockets.
This allows recommending the developed new technological basis of three-stage ultrasonic processing and the necessary equipment as a reliable means to maintain a predetermined value of the quantity (stabilization) of content of the polymer binder impregnated fabric filler.
A number of case studies (including the use of impregnation-drying machine MPT-3M) with the developed technological bases and equipment, providing energy saving process of preparing a polymer binder, impregnating a fibrous filler and dosed application to them the polymer matrix using ultrasonic was studied.
It is noted that with the use of the developed technological bases and equipment is achieved the use of highly viscous and highconcentrated impregnating compositions, and compositions with the disperse filler.