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The development process of plastic filler masterbatch technology modification
- 2020-06-15-

With the development of the plastics industry, the modification of plastic filler masterbatch has promoted the technological progress of related industries, and the development of related industries has also provided a more extensive basis and more options for plastic modification.

The refinement and miniaturization of industrial mineral fillers, theoretically, people have long realized that when the mass ratio of a certain filler to the matrix polymer is constant, the smaller the particle size of the material, the greater the mechanical properties of the modified plastic filler masterbatch. Good, that is to say, on the one hand, the more favorable the expected modification effect, on the other hand, the smaller the decline of certain properties that is inevitable due to the use of fillers. In recent years, domestic industrial mineral ultra-fine crushing and classification technology has made significant progress, and its price can also be recognized by the plastics industry, so that certain expected modification effects and goals can be achieved.

For example, in the treatment of garbage, one of the main ways is incineration. If a certain amount of calcium carbonate is mixed in the plastic film used to make garbage bags, the garbage bag film will be easily burned through and burned out in the incinerator, and the incineration protection will be protected. In Japan, the mass fraction of calcium carbonate in polyethylene film for garbage bags is required to reach 30%. If fine or ultra-fine heavy calcium carbonate powder is not used, and they are uniformly dispersed in the poly-Z ene matrix resin, In order to achieve the filler content accounting for close to IA in the total mass, while maintaining the high mechanical properties of the Fenke film (tensile strength, right-angle tear strength, etc.), it is impossible for its appearance to be smooth and delicate. Of course, the refinement and miniaturization of fillers will also bring certain difficulties to the preparation of filler masterbatch plastics, and as the particle size decreases, the price of fillers will rise rapidly. In consideration of the smooth processing of Pq, the use of fillers with appropriate particle size is the key to achieving high performance and low cost of filled masterbatch plastics.

The surface treatment of composite material interface engineering and filling is in the process of filling masterbatch modification, in order to make the filling masterbatch material reach the top performance target treatment, increase the affinity of the boundary material and the matrix resin. The interface state between the surface filler and the matrix resin has a great influence on the mechanical properties of the filled masterbatch plastic. With the accumulation of experience and the application of high-tech detection and research instruments and methods such as electron microscope, high-resolution nuclear magnetism, x-ray, photoelectron spectroscopy, Fourier transform, and infrared spectroscopy, people have learned from the understanding of fillers and polymers. The interface between them should be developed to actively design the interface structure of the transition layer with chemical, physical, and force effects, and use the corresponding processing technology to achieve it. For example, the interface between the filler and the overall polymer needs to have a certain bond strength, but it is not that the higher the bond strength, the better, and the excessively high road junction strength will lead to the increase of the interlayer shear strength, which will make the filling The impact toughness of the masterbatch material is significantly reduced.