Effects of Humidity on Plastic Raw Materials and Pipes
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Effects of Humidity on Plastics and Pipe Production Process
One of the most important problems of plastics is that they absorb moisture. In order for plastic raw materials to achieve the desired structural and visual properties, the moisture in them must be removed before they become products. Moisture that occurs during storage or transportation can generally be removed with dryer bunkers. If the material used is recycled material and no gas is taken during production, dry air dryers will be inadequate in this case.
Humidity causes the polymer bonds of plastics to weaken and break. As a result, you will see the following results in the extrusion process and the pipe produced;
- Gas explosion in the die head ,
- Unbalanced material flow from the die head,
- Plastic adhesion to pin and spinneret molds,
- Material adhesion to the caliber surface,
- Drilling the pipe in the vacuum pool ,
- Pipe breaking when the tractor is hung,
- Roughness on the inner and outer surface of the pipe ,
- The formation of air gaps in the cross-sectional area of the pipe,
- Failure to pass the pressure test,
- Failure to pass the impact test,
- Breakage in the stock area and during transportation, especially in cold weather conditions,
- After the pressure test, the pipe ends the test by splitting without swelling,
- Failure to pass the Tensile-Extension test,
- Failure to pass the OIT test
*Microscope image of the pipe produced with moist polyethylene raw material
Against the moisture problem that has so many effects, performing the input inspection process before the production process will protect you against the material and moral effects of all these problems.
