Filler

fillers are solid additives that improve composite properties (e.ghardness, stiffness, impact strength, etc.) and reduce costs, unlike reinforced materials, which are granularThe fibrous reinforcement does not act as a fillerthe mechanism of action of filler: filler as an additive, mainly through it occupies the volume of the role, due to the presence of fillers, the molecular chain of the substrate material can no longer occupy the original full space, so that the connected chain segment is fixed to some extent, and may cause the orientation of the substrate polymerDue to the dimensional stability of the filler, the molecular chain movement in the polymer interface area of the polymer is limited, and the glass temperature increases, the temperature of thermal deformation increases, the shrinkage decreases, and the elastic modulus, hardness, stiffness and impact strength are increasedthe role offillers: (1) reduce the shrinkage of molded parts, improve the dimensional stability of the product, surface finish, smoothness and flatness or non-light, etc.; Most fillers can improve the impact strength and compression strength of the material, but they can not improve the tensile strength, (4) can improve the coloring effect of pigments, (5) some fillers have excellent photostability and chemical resistance, (6) have a capacitive effect, can reduce costs and improve the competitiveness of products in the marketthe types of fillers(1) inorganic fillers and organic fillers
(1) inorganic fillers inorganic fillers mainly natural minerals as raw materials mined, processed into the grainy fillers, a few fillers are made of treatmentaSilicon oxide and silicatebcarbonates and carbidescSulphates and sulphidesd Titanium e Oxides and hydroxides f Metals (2) Organic fillers Are made from natural plants and animals and synthetic organic materials (e.g recycled cellulose, synthetic resins, etc.) (2) Inert fillers and active fillers (1) Inert fillers are used directly for drying or dry grinding of natural ores after wet grinding or dry grinding into powder (2) Active fillers are treated with a coupling agent surface so that the surface of the filler has an cladding or natural mineral stomped or both (3) microsphere (solid or hollow) filler microsphere fillerits whose main feature is roughly equal length in any direction a Glass microbeads have solid microbeads (sink beads) and hollow microbeads (drift beads) b Polymer microbeads are polymer microbeads made of organic compounds (4) flaky, fibrous, needle-like filler
(1) scaly fillers are particles that grow more in length than the third direction in both directions, with a scale shape (2) crystals are tiny fibrous monocrystals made of silicon carbide, boron nitride, alumina, graphite or palladium metal oxides (5) glass powder and grated fiberglass fillers are made from broken glass or fiberglass, and are thermoset and thermoplastic substrate fillers that give product heat resistance and low shrinkage, and improve mechanical properties (6) composite fillers utilize the characteristics of different fillers, and make two or more fillercombinations and modifications by special treatment methods