What does Wuhu SKF produce? Is it toxic to workers?

Please ask the CDC to test the occupational hazard factors and sulfides produced in the vulcanization process. But the content is very low, far below the national exposure limit. From this point of view, there is no problem. So don't worry too much.

However, you should know that although the concentration is very low, there will be a little more or less, but it has no direct harm to human health.

If the smell is heavy, it depends on what the problem is.

In addition, you can also consult the person in charge of health and safety in your company and ask him questions in this regard. If you also have an occupational hazard test, he will show you the relevant report.

Extended data:

quality detection

There are strict quality requirements for rubber materials and products, such as tensile strength, elastic modulus, elongation and aging resistance. Rubber products are used in high-precision fields, and these parameters are often very demanding.

In the early stage of china rubber's development, the Rubber Products Committee was established to be responsible for rubber research and development, academic and quality supervision.

1 anti-moderate weight gain test

Samples can be taken from the finished products, soaked in one or more selected media, weighed after a certain temperature time, and the types of materials can be inferred according to the weight change rate and hardness change.

For example, after soaking in engine oil at 100℃ for 24 hours, the change rate of mass and hardness of NBR, fluororubber, ECO and CR is very small, while the weight of NR, EPDM and SBR is more than doubled, the hardness changes greatly and the volume expansion is obvious.

2 hot air aging experiment

Take samples from the finished products and put them in an aging box for one day to observe the aging phenomenon. It can age in stages and gradually heat up. For example, CR, NR and SBR are brittle at 150℃, while NBR EPDM is elastic. When the temperature rises to 180℃, ordinary NBR will become brittle; However, HNBR will become brittle at 230℃, and fluororubber and silica gel still have good elasticity.

3 combustion method

Take some samples and burn them in the air. Observe the phenomenon.

Generally speaking, fluororubber, CR and CSM are not on fire, and even if the flame is burning, it is much smaller than ordinary NR and EPDM. Of course, if we observe carefully, the burning state, color and smell will also provide us with a lot of information. For example, NBR/PVC blends, when there is a fire source, the fire splashes, looks like water, goes out from the fire, and the smoke is thick and sour.

It should be noted that sometimes the glue with flame retardant but no halogen will extinguish itself from the fire, which needs to be further inferred by other means.

4 measuring specific gravity

Use an electronic scale or analytical balance, accurate to 0.0 1 g, plus a glass of water and a strand of hair.

Generally speaking, the proportion of fluororubber is the largest, above 1.8, and most of the CR ECO is above 1.3. These rubbers can be considered as rubbers with significantly higher specific gravity.

5 low temperature method

Take samples from finished products and use dry ice and alcohol to create a suitable low temperature environment. Soak the sample in a low temperature environment for 2-5 minutes, and feel the hardness at the selected temperature. For example, when the temperature is below minus 40℃, silica gel with the same high temperature and oil resistance is softer than fluororubber.

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