??Figuring Hydraulic O-ring

??First, how to identify the specific material of rubber products

??Our production of hydraulic O-rings have a variety of materials, Dingqing hydraulic O-ring, fluorine rubber O-ring hydraulic, silicone O-rings, hydraulic EPDM O-rings, hydraulic neoprene O-rings, etc. identification:

??1, anti-media experiment weight gain

??Sampling can be purchased from a hydraulic O-ring, after determining the temperature, immersed in a selected one or more media, after a certain time taking weight, based on the weight of the rate of change, the rate of change of hardness infer types of materials.

??2, combustion

??Sample burning in the air. Observable phenomena. Of course, if you look closely, the combustion state, color, odor, will provide us with a lot of information. For example, when the NBR / PVC and glue, fire crackling fire source random splash, it seems like the water from the fire self-extinguishing, smoke thick and sour taste. Note that sometimes added flame retardant halogen-free gum, but also from the fire self-extinguishing, which must rely on other means to further inferred.

??3, hot air aging test

??Sample, placed in box aging aging aging day observation. To be able to grade aging, it can be gradually raised. For example, at 150 degrees neoprene, natural rubber, SBR will be brittle fracture, NBR, EPDM also flexible. Rose to 180 degrees, ordinary NBR will brittle fracture; and 230 degrees, hydrogenated nitrile also brittle fracture, fluorine rubber and silicone still have good flexibility.

??4, cryogenically

??Sample with a dry ice and alcohol manufacture a suitable low-temperature environment. The samples were soaked in a low temperature environment for 2-5 minutes at a selected temperature feel the hardness of the O-ring. For example, at -40 ?, the same high-temperature silicone oil good contrast and fluorine rubber, silicone will be relatively soft.

??5, measuring the proportion of

??Precision electronics, plus a glass of water, a hair can be. Generally fluorine rubber for the largest proportion, 1.8 above, CR, ECO is also more than 1.3 or more, significantly larger proportion of these compounds can be considered.

??These methods ingredient can simply test the rubber, if you want a specific test reports, you also need to send a special inspection agencies test job. Large size, large size of the O-ring production process