Reason analysis and prevention method of PU steel wire pipe rust and yellowing
PU steel wire tube is reinforced with spiral copper-plated steel wire, and the steel wire is also covered with a layer of PU. Hangzhou Haikuo PU material is imported from Germany, and the inner wall is smooth, which makes the material flow more smoothly. Compressible (stretch ratio is 1:4), light and soft, resistant to abrasion, mineral oil and has good weather resistance, ozone resistance and aging resistance. Especially suitable for dynamic suction and conveying working environment. Compared with the steel wire hose without a PU outer layer, this process makes the hose have stronger bending tension, and the halogen-free steel wire grounding can discharge static electricity. The PU steel wire tube rusts and yellows during use. What causes it? How to prevent the PU steel wire tube from rusting and yellowing?
What is the reason for the rust of PU steel wire hose?
The structure of the PU steel wire pipe product is that the steel wire is embedded in the inner wall of the hose. The good quality pipe should be tightly inlaid without gaps, and will not allow air and water to enter the room. If the steel wire of the PU steel wire pipe The inlay is not tight enough, which has a great impact on the quality of the product, because such a situation seriously affects the mission life of the PU steel wire pipe. The main hazard is that it is easy to enter water and air in the place where the inlay is not tight, and the water and air are double. Under the action of the pressure, it will cause the appearance of rust of the copper-plated steel wire. If this happens, if the hose still needs to have a certain telescopic movement during use, it will cause the friction between the hose and the pipe wall to increase, which is easy to cause Unnecessary damage to the pipe wall appears, which greatly affects the service life of the PU steel wire pipe.
Cause analysis and prevention of yellowing of PU steel wire pipe body
1. The yellowing of the PU steel wire hose caused by the antioxidant effect. Now many PU steel wire hoses mainly choose TDI (toluene diisocyanate) or MDI (diphenylmethane diisocyanate) as raw materials. Such substances undergo complex chemical reactions under the action of light, heat, oxygen, and especially ultraviolet rays to generate chromophores. The resulting PU steel wire hose is prone to yellowing and cannot maintain a high transparent color for a long time.
2, ultraviolet light can also cause the PU steel wire hose to turn yellow. When the finished PU steel wire hose is produced and needs to be placed for a period of time. Place it in a dark, dry area. Especially avoid direct sunlight.
Solution to prevent yellowing of PU steel wire hose:
Minimize the oxygen content in the area where the PU steel wire hose is produced and stored (inert gas can be filled). It is also possible to add antioxidants, ultraviolet absorbers and other methods to effectively delay the yellowing of the PU steel wire hose.
Of course, yellowing does not affect the performance of the PU steel wire hose, but only affects the visual experience. The PU steel wire hose produced by Hangzhou Haikuo adopts high-quality raw materials imported from Germany, BASF, Bayer and other world-renowned chemical giants. It can effectively delay the yellowing of the PU steel wire hose.