A-Z Rubber Glossary of manufacturing words & terminology
The rubber industry has developed many words and terms that are unique to it, and our Rubber Glossary is intended to help clarify what is meant by these words.
Abrasion
the surface loss of material due to frictional forces.
Abrasion Resistance
the resistance of a material to loss of surface particle due to frictional forces.
Blister
a cavity or sac that deforms the surface of a material.
Cell
a single small cavity surrounded partially or completely by walls.
Cellular Material
a generic term for materials containing many cells (either open, closed or both) dispersed throughout the mass.
Cellular Rubbers
a cellular material made of rubber. Cellular rubber products all contain cells or small hollow receptacles. The cells may either be open or interconnecting, or closed and not interconnecting.
Closed Cell
a cell totally enclosed by its walls and hence not interconnecting with other cells.
Collapse
inadvertent densification of a cellular material during its manufacture resulting from breakdown of its cellular structure.
Compound
an intimate mixture of a polymer with all the ingredients necessary for the finished article.
Compression Deflection
PSI to compress lab slab a specified percentage of overall height, normally 25%.
Compression Set
the residual deformation after removal of the force that has subjected the specimen to compression.
Crazing
a surface effect on rubber articles characterized by many minute cracks.
Cure
the act of vulcanization. See vulcanization.
Durometer
an instrument for measuring the hardness of vulcanized rubber or plastic. Shore 00 scale is for sponge, Shore A for dense/solid.
Durometer Hardness
an arbitrary numbering scale that indicates the resistance to indentor point of the durometer. High values indicate harder materials.
Expanded Rubber
Cellular Rubber having closed cells made from a solid rubber compound.
Open Cell
a cell not totally enclosed by its walls and hence interconnecting with other cells.
Ozone Cracking
the surface cracks, checks or crazing caused by exposure to an atmosphere containing ozone.
Post Cure
heat or radiation treatment to which a cured or partially cured rubber is subjected to enhance one or more properties.
Rebound
a measure of the resilience, usually as the percentage of vertical return of a body that has fallen and bounced.
Rubber
a material that is capable of recovering from large deformations quickly and forcibly, and can be, or already is, modified to a state in which it is essentially insoluble (but can swell) in boiling solvent, such as benzene, methyl ethyl, ketone and ethanol-tulene isotope.
Set
strain remaining after complete release of the load producing the deformation.
Shelf Aging
the time an unvulcanized rubber stock can be stored without losing any of its processing or curing properties.
Shore Hardness
see durometer hardness.
Skin
a relatively dense layer at the surface of a cellular material.
Sponge Rubber
cellular rubber consisting predominantly of open cells made from a solid rubber compound.
Substrate
a material upon the surface of which an adhesive is applied for any purpose such as bonding or coating.
Tear Strength
the maximum load required to tear apart a specified specimen, the load acting substantially parallel to the major axis of the test specimen.
Tensile Strength
the maximum tensile stress applied during stretching a specimen to rupture.
Vulcanizate
preferably used to denote the product of vulcanization, without reference to its shape or form.
Vulcanization
an irreversible process during which a rubber compound through a change in its chemical structure (for example: cross-linking) becomes less plastic and more resistant to swelling by organic liquids and elastic properties are conferred, improved, or extended over a greater range of temperature.
Weathering
the surface deterioration of a rubber article during outdoor exposure, such as checking, cracking, crazing or chalking.
