TPE on the market below 0 degree is a special material used for some special requirements.
Hardness range of TPE material
TPE, if not specified, generally refers to the granular polymer alloy material based on SEBS,SBS elastomer, with the addition of other operating oils, reinforcing plastic resins, fillers, compatibilizers, functional additives, etc. Some oils of SEBS,SBS elastomer (such as naphthenic oil and paraffin oil) have better solubility (oil absorption), and by solubilizing different proportions of oils, the hardness of the blending system can be regulated, and then blended into TPE alloy materials of different hardness. By dissolving different proportions of oil, the hardness of the blending system can be adjusted, and then co-mixed into different hardness of TPE alloy materials. Generally speaking, the hardness of TPE materials can be adjusted in the range of 0~120A (A refers to Shore A hardness, which will be described in detail next).
How to measure the hardness of TPE material
The A mentioned above refers to Shore A, which is the common way of expressing the hardness of rubber-like soft materials, and corresponds to Shore A. Shore A generally measures TPE or rubber materials in the hardness range of 10~95 A, and the test value is more accurate, and the hardness above 95 A is generally measured by Shore D, and accordingly there is Shore D. When the hardness of TPE is lower than When the hardness of TPE is lower than 10A, the result is not so accurate when tested with Shore hardness tester A, then generally use Shore hardness tester C to test, the unit of hardness is Shore C, also useful to measure the hardness unit OO.
General TPE degrees, refers to ShoreA, 0 degrees that is 0A, as mentioned above, SEBS has a very good oil absorption, the greater the proportion of oil, the softer the total mix into the TPE. When the oil is added to a certain boundary, the hardness of the TPE will be soft to Shore A hardness tester A table value shows 0 and can not be read, it can be considered that the hardness of the TPE material reached 0 degrees (A) or below 0 degrees (A), then only with Shore A hardness tester C to test the hardness close to 0A or below 0A super soft TPE material.
1, Shore A hardness tester, the pressure needle head is blunt, suitable for testing hardness 10 ~ 95A material,
2, Shore C hardness tester, pressure needle with curved surface, suitable for testing ultra-soft materials with hardness below 10A,
3, Shore D hardness tester, the pressure needle is sharp, suitable for testing materials with hardness above 95A.
Application of TPE material
TPE material with hardness lower than 0 degree is used in some super soft erotic goods, display props, shock absorbing cushions, seat cushion products and so on.