How to Solve the Transparency of PET Bottles in the Blowing Process

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Many customers ask why the transparency of PET bottles blown by the same material and machine is not good.

Let me tell you the specific reasons and solutions below. The poor transparency of the blow molding machine is nothing more than the following situations: 

  1. The heating temperature is too high, 

  2. The heating time is too long,

  3. The compressed air contains water,

  4. The injection molding embryo tube itself is opaque, (you need to find the reason from the injection molding machine side),

  5. The rationality of the embryo tube design 6. The inflation ratio is too small, the thickness of the tube blank, etc.

The solutions are: 

  1. Cool down

  2. Shorten the heating time of the machine

  3. Use a dryer to remove water

  4. Improve the quality of embryo tubes, select materials and improve the dryness of raw materials

  5. Improve embryo tube size design

  6. Reduce the diameter of embryo tube