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Plastics Today: Wet versus dry preforms: knowing the difference is critical

By: Sumit Mukherjee – CTO of PTI

Have you experienced issues blow molding bottles from inventoried preforms? Have you spent hours trying to tweak your blow molding equipment settings, without really getting to the root of your problem? You just might be looking in the wrong place.

The issue could very well be with the length of time your preforms have been stored and not the preform design or problems with the resin from which they were molded.

In this day and age of trying to maximize profitability, companies may be scheduling large preform runs thinking that that is the best way to improve production efficiencies. This approach may work well for a wide variety of products, but not so much where preforms are concerned. It all boils down to how much moisture those stored preforms have absorbed.

Read the full article on Plastics Today.