filler

technology

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June 26, 2026

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The term "filler" can refer to a soft material used to fill hollow parts of an object, such as Styrofoam used to protect a vase during shipping. In the context of rubber technology, fillers are ingredients added to natural or synthetic rubber to achieve specific properties.123

Two key fillers that significantly strengthen elastomers are carbon black and silica. Carbon black, made from incomplete combustion of oil or gas, consists of tiny particles that can form chains, increasing the rubber's elastic modulus and resistance to abrasion. Silica, similar in particle size and shape, also enhances these properties. While these fillers improve strength, they can decrease resilience and stiffness after flexing. For a filler to be effective, its fundamental particles must be small, and the elastomer must adhere well to them.3

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plastic
Reinforcements
…can be incorporated as particulate fillers. (The use of long or even continuous fibres as reinforcement, especially with thermosets, is described below in Fibre reinforcement.) Incorporating large amounts of particulate filler during the making of plastics such as polypropylene and polyethylene can increase their stiffness. The effect is less dramatic…
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…can be incorporated as particulate fillers. (The use of long or even continuous fibres as reinforcement, especially with thermosets, is described below in Fibre reinforcement.) Incorporating large amounts of particulate filler during the making of plastics such as polypropylene and polyethylene can increase their stiffness. The effect is less dramatic…
Read More

rubber
Fillers
Almost every conceivable material has been added to rubber in attempts to cheapen and stiffen it. Two particulate fillers are outstanding because they also strengthen elastomers to a remarkable degree. The most important, used almost universally, is finely divided carbon black, prepared by incomplete…
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Almost every conceivable material has been added to rubber in attempts to cheapen and stiffen it. Two particulate fillers are outstanding because they also strengthen elastomers to a remarkable degree. The most important, used almost universally, is finely divided carbon black, prepared by incomplete…
Read More