Home » Quality » Quality control

QUALITY

  CONTROL

IT IS NECESSARY TO CARRY OUT RIGOROUS
QUALITY CHECKS TO MAKE PERFECT PREFORMS

The quality of a preform comes from the precision of its moulding. If a preform is defective, it will inevitably cause problems during the bottle manufacturing stage and hold up the whole production chain. Supplying perfect preforms is thus one of Valgroup’s qualities.

To facilitate the work of all our clients and ensure continual and linear flow in the manufacturing process of the finished product, we carry out quality checks on both the raw materials used and the finished PET preforms and we only offer excellent products.

01

VISUAL INSPECTION OF FLOW LINES WITH POLARISED LIGHT

Inspection of correct PET preform moulding carried out by a skilled operator who verifies the absence of defects using polarised light.

02

SIZE AND WEIGHT CHECK

Inspection to verify that the product presents all the technical specifications and parameters of the sample preform.

03

COLOUR CHECK

Thanks to the use of a colorimeter, we check the colour conformity of the preform against the parameters of the sample preform.

04

ACETALDEHYDE CHECK

Using special machinery, the acetaldehyde content inside the preform is checked.