Filler (materials)
particles added to a matrix material, usually to improve its properties or reduce cost
Filler materials are particles added to binders (resin, thermoplastics, cement) to make a composite material. Filler materials improve specific properties or make the product cheaper.
Coarse filler materials such as construction aggregate and rebar are used in the building industry to make plaster, mortar and concrete.
Powdered fillers are mixed in with elastomers and plastics. Worldwide, more than 53 million tons of fillers (with a net worth of ca. US$18 billion) are used every year in the production of paper, plastics, rubber, paints, coatings, adhesives, and sealants. Fillers are produced by more than 700 companies, rank among the world's major raw materials and are contained in a variety of goods for daily consumer needs. The top filler materials used are ground calcium carbonate (GCC), precipitated calcium carbonate (PCC), kaolin, talc, and carbon black.
Filler materials can affect the tensile strength, toughness, heat resistance, color, clarity, etc. This can be utilised to modify or enhance the material properties, or as a way to improve and control the processing characteristics.
This brief starts where responsible research should: with the source description of “Filler (materials)” as particles added to a matrix material, usually to improve its properties or reduce cost. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the general reference register because the source frames it as particles added to a matrix material, usually to improve its properties or reduce cost. Its deeper value depends on whether names, dates, institutions and citations support that framing.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jul 27, 2026. The linked authority identifier is Q905592. The Library of Congress control number is sh85048218. 1 of 1 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Filler (materials)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.