Mikrotäyteaineita

Mikrotäyteaineita, known in English as microfillers, are finely divided solid materials added to polymers to modify their properties. These particles are typically on the micrometer scale, although some definitions extend to the nanometer range. The primary purpose of incorporating microfillers is to enhance the mechanical strength, stiffness, and dimensional stability of the polymer matrix. They can also influence properties such as abrasion resistance, thermal conductivity, and electrical conductivity depending on the type of filler and polymer.

Common types of microfillers include inorganic materials like calcium carbonate, talc, silica, and clay. Organic fillers, such as wood flour or cellulose fibers, are also used. The choice of microfiller depends on the desired performance characteristics, cost considerations, and compatibility with the polymer system. The size, shape, surface chemistry, and concentration of the microfillers significantly impact their effectiveness. For instance, irregularly shaped fillers can improve stiffness, while spherical particles may enhance impact strength.

The dispersion of microfillers within the polymer matrix is crucial for achieving optimal results. Poor dispersion can lead to agglomeration, creating weak points and negatively affecting the material's overall performance. Surface treatment of the fillers is often employed to improve their adhesion to the polymer matrix, leading to better mechanical reinforcement and reduced water absorption. Mikrotäyteaineita are widely used in various industries, including automotive, construction, packaging, and electronics, for applications such as plastics, composites, coatings, and adhesives.