Solution to the seam on the outer layer of the cloth-covered hose

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How to solve the problem of traces and bamboo patterns on the outer layer of the fabric-covered hose

There are traces and slub patterns on the outer layer of the cloth-covered hose, which are more likely to occur in rubber materials containing neoprene. Main reasons:

1. The water cloth winding pressure is insufficient and the pressure applied to the pipe body is uneven, with one side being too large and the other side being too small.
2. The overlap width of the water cloth winding is too small.
3. The width of the water cloth used is too large.
4. The rubber material (sheet) is too cold, too hard or too viscous.
5. The rubber hose vulcanizes too quickly.

Take measures:

1. Apply sufficient and even pressure to the pipe body when wrapping the water cloth around it.
2. When the used water cloth is reused, it should be used according to the original elastic edge of the water cloth.
3. Water cloths of different widths should be selected according to the outer diameter of the hose. The overlap width of the water cloth should be 3/5-2/3 of the width of the water cloth.
4. Check the new water cloth to be used. There should be no tight edges.
5. Keep the ambient temperature of the work area above 18°C.
6. Control the storage time of the film to be used up within 2 to 12 hours, and should not exceed 3 days. Film containing chloroprene rubber should be used up as soon as possible, otherwise the film needs to be re-released. In addition, it should be noted that the storage period of chloroprene rubber cannot be too long. , Neoprene that has exceeded its storage period should not be used for outer rubber.
7. Adjust the amount of outer rubber softener to increase plasticity, and use sulfonamide post-effect accelerator to increase the flow of the rubber in the early stage of vulcanization.