Rubbermaker's Sulfur

Sulfur has been used as a rubber chemical since Charles Goodyear discovered its vulcanizing properties in the mid 1800's. Sulfur gives the compound hardness, allowing it to be molded, but still retain its elasticity.   Pencil erasers, rubber bumpers on automobiles, and latex gloves all use the same type of product, but in different quantities and heat variations.
Rubbermaker's sulfur products vary widely in formulation and use.  Sizes milled range from 44 to 74 microns.   Conditioning agents are added to improve flowability, handling, and dispersion characteristics of finely ground sulfur.  Oil is often added as a dust suppressant, reducing the risk of a sulfur dust explosion.  Flow agents prevent caking, and are especially useful when using automatic feed equipment for batching.

The following sulfur options are called grades, and offer a wide choice of purity, fineness, and conditioning agents for rubber processing

Grinding and Screening

There are various grades of rubbermaker's sulfur which differ primarily in fineness.  Choice of screen size is usually made by the user based on his own operating experience and needs. Coarsely ground grades are considered somewhat less dusty while finely ground grades have dispersion advantages.

Conditioning Agents

Oil Treatment