With the development of the plastics industry, the modification of plastic filling masterbatches has driven the technological progress of related industries, and the development of related industries has also provided a more pan-based shopping base and more options for plastics modification.
Refinement and miniaturization of industrial mineral fillers. In theory, people have long recognized that when the mass ratio of a filler to the matrix polymer is constant, the smaller the particle size of the environment filler, the more mechanical properties of the modified plastic filler masterbatch. Good, that is to say, on the one hand, it is more beneficial to the expected modification effect, and on the other hand, the decline in certain properties of the rabbit due to the use of fillers is smaller. In recent years, domestic industrial mineral ultra-crushing and classification technology has made significant progress, and its price can be recognized by the plastics industry, so that certain expected modification effects and goals can be achieved.
For example, when disposing of garbage, one of the main coating paths is incineration in plastic films made of dry-made garbage bags. If calcium carbonate is mixed in a certain number of chapters, in the incinerator, the garbage bag film is easy to burn through, burn and make The incinerator is protected. In Japan, the mass fraction of calcium carbonate in the 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 polyethylene matrix resin, It is impossible to achieve a high filler content, which is close to IA, while maintaining the high mechanical properties (pulling strength, right-angle tearing strength, etc.) of the thin film. Of course, the refinement and miniaturization of the filling section will also bring certain difficulties to the preparation of true allowable master batch plastics, and as the first particle size decreases, the price of fillers will rise rapidly. Pq considers that in the case of smooth processing, the use of fillers with appropriate particle size is the key to achieving high performance and low cost of filled masterbatch plastics.
In the process of composite masterbatch modification and surface modification of composite materials, in order to make the filler masterbatch material reach the performance target of the top stage, the affinity between the matrix material and the matrix resin is increased. The interface state between the surface filler and the matrix resin is often first applied to the filler, which has a great impact on the mechanical properties of the filled masterbatch plastic. With the accumulation of experience and the use of high-tech detection and research instruments such as electron microscopes, high-resolution nuclear magnetic resonance, x-rays, photoelectron spectroscopy, and Fourier transform and infrared spectroscopy, and people's applications, people have learned from fillers and polymers. The interface between them should have chemical, physical, force, and other transition layers to develop the interface structure state actively, and adopt the corresponding processing technology to achieve. For example, the interface between the filler and the overall polymer needs a certain bonding strength, but it is not necessarily that the higher the bonding strength, the better. The excessively high road junction strength will lead to increased interlayer shear strength, which will cause the filling The impact toughness of the masterbatch material is significantly reduced.