Raw Material

Our Wear Resistant Rubber Block compound from world class suppliers or domestic rubber supplier and customized pantone code is available, hardness from 30 to 90 Shore A.

Size

Standard size with our current mold or customized according to your sample or drawing( 2D, 3D drawing , format STP, DWG, PDF , etc)

Quality and Certificate

We execute ISO9001 quality system and our Wear Resistant Rubber Block has passed ROHS/Reach/WARS certificate.

Mold and tooling

In house tool making and free of tooling charge for standard rubber block, the mould parting line will be sent to customer confirmation.

Management and quality tracking: Strict material traceability under ERP system.

Wear Resistant Rubber Block process flow

PO confirm---Develop mold according to drawing or sample---Develop chemical formula according to specifications---Mix the raw material as per formula---Prepare and Install the mold on the machine---Preform the rubber compound---Put the compound into mold and vulcanization with certain temperature and pressure---After a while, remove the goods from the mold---Trimming the flash---Inspection---Packing---Shipping

Small MOQ: there’re variety Wear Resistant Rubber Block in stock, so mini MOQ is acceptable.

Function: damping, protect and shock absorb

Payment: T/T, L/C, Credit card. USD, RMB ,Euro and so on other currency is available.

Trade Term: EXW, FOB, CIF etc

Package: poly bag and carton(40*32*25CM). If you need pack by pallet or other customized package, it’s also ok.

Shipping method: By air, by sea, by express, multi-modal transport

Ozone is an important factor leading to the aging of rubber products in the atmosphere. Ozone is more reactive than oxygen, so its invasion of rubber, especially unsaturated rubber, is more serious than oxygen.

When ozone contacts rubber products, the addition reaction of ozone and active double bond takes place first, and the molecular ozonide is formed. The 1 molecular ozonide is very unstable, and quickly decomposes into carbonyl 2 and zwitterion. 3 in most cases zwitterion and carbonyl compound will be combined into different back ozonide ©, zwitterionic can also generate 2 peroxide © aggregation or high peroxide ©, when there is activity of methanol solvent, zwitterionic will react with the generated ozone methoxy hydrogen peroxide content 4 and the low unsaturated rubber in the reaction activation energy, reaction easily, Reaction until the rubber double bond consumption is finished, at this time in the rubber surface to generate a layer of silver elastic film, as long as there is no external force to crack the film, rubber will not continue to ozonation. If the ozonated rubber is stretched or dynamically deformed, the generated ozonated film will crack, exposing the new rubber surface and react with ozone, which makes the crack continue to grow. Saturated rubber does not contain double bonds, although it can react with ozone but the reaction is slow, not easy to crack.

Ozone (O3) in the atmosphere is formed by oxygen molecules that absorb the short-wave ultraviolet light in the sun's light, and the decomposed oxygen atoms recombine with oxygen molecules. There is an ozone layer with a concentration of about 5X10 -- in the air 20 ~ 30km away from the earth's surface. With the vertical flow of air, ozone is brought to the earth's surface, and the concentration of ozone gradually decreases from the altitude to the ground. In addition, ozone is produced in places where ultraviolet light is concentrated, near electrical discharge sites, and near electric motors, especially where sparks are generated. Normally the ozone concentration in the atmosphere is 0 ~ 5x10-8. The concentration of ozone is different in different regions. The concentration of ozone varies depending on the season. Although the ozone concentration near the ground is very low, but the damage to rubber is not negligible.

Unsaturated rubber is prone to ozonation and its appearance characteristics after ozonation, which is different from thermal oxygen aging. Firstly, the ozonation of rubber products is only carried out on the surface layer touched by ozone, and the whole ozonation process is from the surface to the inside. 2 it is rubber react with ozone to generate a layer of silver epidural (about lOnm thick), under the condition of static this membrane can prevent ozone contact with rubber deep, but in the dynamic strain conditions or in the condition of static stretching when the rubber elongation or tensile stress exceeds its critical elongation or critical stress, the membrane will produce crack, to come into contact with new rubber surface ozone, The ozonation reaction continues to occur and the crack grows. In addition, due to the stress concentration at the base after the crack appears, it is easier to deepen the crack and then form a crack. The direction of cracks is perpendicular to the direction of stress. Generally, only a few cracks appear under small strain (such as 5%), and the direction of cracks is clearly discernable. When the rubber is stressed in multiple directions, it is difficult to identify the direction of cracks.

The activation energy of the reaction between ozone and unsaturated rubber is very low, and the reaction is easy to carry on. The reaction is carried out until the double bond of rubber is consumed. At this time, a layer of silvery white elastic film is generated on the surface of rubber. If the ozonated rubber is stretched or dynamically deformed, the generated ozonated film will crack, exposing the new rubber surface and react with ozone, which makes the crack continue to grow.