Quality Control

B&I’s QC process for plastic bottle production 

At B&I we pride ourselves in constantly improving or maintaining the quality of our products. 

We understand that by doing so, we help our clients to meet their customer demands and expectations. Our Quality Control (QC) department has developed a well-established control system for our QC managers, employees and factory staff to follow, using both external and internal aspects. 

External aspect

The external aspects of the quality controls at B&I look at the different machines and various products that they produce.

Randomly selected products from each machine are checked on the factory floor hourly. If any obvious defects are found, the QC manager will halt production and flag the production of the relevant machinery for investigation. Once the cause of the abnormality is sourced and resolved, the QC team ensures that production can be resumed. All bottles deemed below standard are marked for recycling and removed from production.

Additionally, the machinery is continuously inspected and evaluated for wear and tear and any possible drop in production ability. The operators are then evaluated for their performance and output to ensure the same level of production is reached at all times. 

Internal aspect

Internal aspects focus directly on the bottles produced by taking samples from machines on the floor and submitted for in-depth testing. B&I run many tests to ensure the correct specs have been followed and the overall quality of the bottle is good, but here are just a few of the most common testing methods: 

          Scorch test – This test checks bottle externally for dark marks, caused by heat, on the bottle. If dark marks are found, then the bottle and the corresponding batch is rejected and scrapped. 

          Pinhole test – The sample bottle is filled with water and light pressure is applied. Any faults in the bottle will leak and the bottle is rejected. This checks for any pinholes that are in the bottle that can form from uneven plastic distribution.

          Weight test – The sample bottle is placed on the scale and checked that it is up to specification in terms of the required weight. If the bottle is heavier, this will cause unnecessary costs as it uses excessive resources. A lighter bottle may not perform to the required standard and may lead to leakage or damage of the contents. 

          Neck test – The strength and measurements of the bottleneck are tested for durability and cap fitting. This is to ensure that the bottle will not break under normal wear and tear circumstances. 

          Flash test – The sample bottle’s seams are checked for any frayed plastic. This is to ensure that excessive resources are not being wasted and that the bottle is aesthetically pleasing. 

Find out more

We hope that you now have more insight into our QC process. For more information or for a guided tour of the factory and an in-person demonstration of the QC process, please contact us. We’ll be happy to make an appointment with a member of the sales team and our QC manager. 

B&I Polycontainers is a Proudly South African plastic bottle manufacturer and has decades of experience in supplying the best plastic bottles locally and internationally. Contact us today for your packaging needs. 


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