DAEHAN TIRE

1. HARDNESS:

The relative resistance of rubber to the penetration of a blunt point impressed on its surface. Several instruments are used, the two most popular being the Shore A meter and the Wallace meter. Within small limitations, readings of both instruments may be taken as being comparative within the nomal rubber. Hardnesss does not include compound quality.

2. TENSILE STRENGTH

This is the force being applied at the time of rupture or break when a specimen is stretched . Measured in kg/㎡.

3.STRESS

The relationship of load and deformation of cured rubber compound.

4.TENSILE STRESS

The relationship of load and deformation of a test specimen, when the specimen is streched. Measured in kg/㎡.

5.AGING ELONGATION

This is the deformation of the specimen which is streched, after putting the specimen in the aging test during specific time.

6. AGING

This is the quality and condition's change and ability deterioration of phyical and chemical in the rubber goods. It may be caused by the heat, Ozen, and the sunshine.

7.ELONGATION

The elongation of material at the moment of rupture. Measured as percentage.

8.COMPRESSION SET

The decrease in the thickness of a test specimen measured 30 minutes afer removal from a device in which the specimen has been subjected to compressio deformation.

9. MODULUS

This is the ratio of stress to strain, the stress imposed being a stretching force, the strain being a stated percentage elongation or stretch , usually 300%. It is a mea - sure of stiffness and is influenced by compounding ingredients, the state of cure, quality of the polymer and other factors.