Some factories reported that their rubber hoses had no problems when the customers used them, but when they tested them, they found that when the pipes were bent to a large extent (such as 180 degrees) and exposed in the open air for a week, many cracks would appear, as if they were aging. In other manufacturers, such cracks are not obvious when the glue content is relatively low. What's the reason? below PVC hose The manufacturer's editor will introduce the relevant contents in detail.

2. If the rubber content is relatively low, but it is not easy to crack, it depends on what is filled, the selection of raw rubber types, and the improvement of the protection system.

3. After being bent 180 degrees, the hose was exposed to the sun for seven days and cracked. It may also have little to do with the rubber content of the hose. It is more likely that after bending, the stress will be concentrated and the hose will age faster. After being exposed to the sun for seven days, the ultraviolet ray in the sun has an effect on the rubber hose, which is aged and cracked by ozone.

1. Cracks are easy to occur after bending, which may be caused by poor ozone performance and low gum content, so it can be improved from formula adjustment.

The above points are PVC hose The reason why the PVC hose has cracks was introduced by the manufacturer. I hope it can help everyone!