Inspections

Since organic solvents such as printing agents and glue are used during manufacturing processes for food packaging materials and containers, we need to carry out quality control for these residual organic solvents.

In order to prevent physical damage from these organic solvents, at Kumagai we thoroughly control for residual organic solvents using gas chromatography.

At Kumagai, we have installed in-line defect inspection devices for all printing machines and laminating machines, which we use to inspect for printing defects.
A detailed photographic history of all defects occurring is stored for a certain time. In the unlikely event that a defective product is shipped, the extent of shipping will be identified and the cause of the defect clearly determined.

We measure the resistance of the bag opening and other sealed sections, so that we can fine-tune the bag’s ease of opening.

Even when we are designing the optimal strength of products to be opened by hand, we carry out testing using the latest strength measuring equipment, since high precision measurement is required.

For products where the customer intends to carry out high-temperature boiling or retort sterilization, we test these in advance using testing equipment.