In heavy gauge vacuum forming, various problems can arise during the processing and production of blister packaging. One common issue is the variation in color, with some products appearing lighter and others darker. Particularly problematic are blister products that turn yellow, as this affects their presentation and overall aesthetic appeal, ultimately impacting sales. So, what causes this discoloration? Let's explore further.

Yellowing in thick sheet blister products may be attributed to issues with the blister mold. Poorly designed exhaust holes in the mold can result in a violent reaction between the plastic and oxide at high temperatures and pressures, causing the plastic to burn. Additionally, excessive lubricants and release agents in the blister products can contribute to yellowing. Regular cleaning and the removal of certain additives are necessary to mitigate this problem.

Furthermore, inadequate sanitation of production equipment can lead to contamination of the blister sheet by dust particles, resulting in discoloration of the final product. Imbalances in the heating system can also prevent the production temperature from meeting the required specifications, leading to discoloration.

By providing this information, we aim to enhance your understanding of blister products and the factors that can affect their color. If you would like to learn more, please contact us +8618821226686.

Founded in 2003, Pinghu Yangzhiguang Packaging Products Co., Ltd. is located in Pinghu City, Adjacent to Shanghai

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