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2026-06-30
When a packaging client requests standard technical specifications for their rigid PET sheet rolls, the story usually seems straightforward. But in high-precision thermoforming, what a client thinks they need versus what their machinery actually requires can mean the difference between a smooth production line and a costly bottleneck.
Recently, a new food packaging manufacturer approached Jiangyin Jiaou New Materials for product sampling. During our initial communication, we asked about their preferred silicone oil ratio to ensure smooth de-nesting. Following their request, the client specified a "light silicone coating" (轻硅). We precision-tailored the PET samples exactly to their instructions and shipped them out for a factory trial.
The Sticking Point: Diving Into Machine Metrics
A few days later, the feedback arrived. Despite the silicone layer, the client reported that the PET trays were sticking tightly together after thermoforming, making them incredibly difficult to separate (de-nest) on their automated line.
Instead of merely adjusting the coating blindly, our team dug deeper into the physical mechanics of the client's operation. We initiated an in-depth consultation, asking highly targeted technical questions: How many cavities or forming ports does your thermoforming machine have? What is the precise depth of the mold cavities?
The Diagnosis by Our Veteran Tech Team
With these detailed machinery parameters in hand, our veteran technical experts quickly identified the root cause. Deep-draw cavities and multi-port machinery create immense physical vacuum and surface tension during high-speed thermoforming. A basic, surface-level light silicone layer was simply not enough to withstand those specific mechanical stresses.
"For deep-draw molds and multi-port configurations, standard lubrication fails. This line required an upgrade to a medium silicone oil formulation, or a specialized blend of light silicone paired with an internal anti-blocking agent (轻硅+轻内爽)." — Jiaou Technical Team
The Solution: Flawless Separation at Zero Extra Cost
Based on our experts' diagnosis, we formulated a second batch of custom PET roll samples utilizing the medium silicone formulation. When the client mounted the new rolls onto their machinery, the results were immediate: the thermoformed trays demolded effortlessly, separated cleanly on the automated conveyor, and the production line ran at peak velocity without a single hitch.
At Jiaou Plastic, applying the right level of silicone oil is a standard, complimentary service built directly into our manufacturing process. But more importantly, our true value lies in our technical depth—we don't just supply material; we audit your mechanical reality to deliver the exact formulation your line needs to succeed.
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