Hardness
Laboratory > Physicals
| Hardness Shore | |
It is a property that anyone can notice simply by touching the rubber, but to determine exactly the level of hardness, specific instruments are needed as well as reference standards that will be described later. The solid rubber has a hardness ranging from 20 to 98 Shore A, 20 representing the point of extreme softness and 98 constituting the extreme point of hardness. All types of rubber can be prepared to cover most of this hardness spectrum. The exact calculation of the hardness required is of fundamental importance for a piece of rubber to function properly and to develop its function (in cases where a certain deformation is required due to contact with a friction surface or when an abrasion resistance it is necessary. |  |
The Shore scale is the most used to measure the hardness of soft and semi-hard materials such as rubbers, elastomers, plastics, etc. There are different types of durometers according to the different families of materials, having the possibility to measure hardness to both a rubber and a plastic. The word "durometer" is used to refer to the equipment to measure Shore hardness, used to identify all hardness test benches that exist. Hardness is a property of materials, it is defined as the resistance to permanent penetration under static or dynamic load that a material has, after performing several tests. Generally, a good hardness means that the material is resistant to scratches and to the use, very important characteristic in the case of the tooling used in the manufacture. There is a strong correlation between hardness and strength of a material. Within the Shore hardness are deferent ladders depending on the shape of the punches used and the characteristics of the springs (applied load). Shore A and D are the most common scales. |  |
| Escalas disponibles shore | Normas |
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