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What are the reasons for the whitening of PET material products?

2022-09-26
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PET material projects are more popular among customers in recent years, and most of them are used in daily necessities such as storage boxes, wine boxes, cosmetic boxes, washbasins, cups and other highly transparent products. Its properties are: high transparency, resistance to falling and not breaking, and good strength and feel. PET material characteristics: the gate is easy to turn white, it is easy to stick to the mold during the production process, and the surface of the product is easy to be pulled.

Analysis of the reasons for the whitening of PET plastics:
Reason 1: Whether the injection port has a cooling system, or whether the cooling effect is good or not.
Reason 2: The cooling water temperature is controlled within the range.
Reason 3: The injection molding process makes the mold appear whitish.
Reason 4: Is there an insulating cap for the hot runner of the gate?
Reason 5: Improper injection molding process conditions, such as: low injection temperature, too fast injection speed, too high pressure, too long holding pressure, internal stress of the product and other factors will cause whitening in some parts of the product.

PET is a crystalline plastic, and poor temperature and cooling control will also lead to whitening (actually a crystallization phenomenon)

After years of development and research on PET material products, our company has completely solved all the problems that can arise in this regard.

We will provide you with a satisfactory mold solution, if you are looking for PET project mold, please feel free to contact us.