Technical blog
Coaterex technical articles on water-based barriers, recyclability, Cobb testing, and sustainable packaging conversion.
The Cobb test: how to measure your paper's water resistance, step by step
The complete Cobb test procedure per TAPPI T 441: the equipment you need, the mistakes that skew results, and how to read the numbers you get.
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Migrating your corrugator to water-based barriers without stopping production: the methodology
How to replace waxes and laminates on a running corrugator: stages, pre-production checklist, quality protocols, and the mistakes that cost the most.
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Why plastic laminates are running out of road (and what's replacing them)
PE laminate solved the moisture problem for 40 years. Today it blocks recycling, exposes brands to the PPWR and EPR schemes, and already has a mature technical replacement.
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HydraBan®: the water barrier that wins on cost, not on overkill
Cobb 22-28, up to 90% dilution at the plant, and application on the corrugator you already have. What HydraBan® is for, what it isn't, and how it changes the cost model.
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From field to supermarket: why fruit boxes collapse (and how to prevent it)
High humidity plus constant refrigeration is the worst possible environment for a corrugated box. What happens inside the container, which metrics to demand, and how to protect yourself without giving up recyclability.
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Water and grease at once, without PFAS or plastic: the myth chemistry already busted
For decades, water barrier and grease barrier were incompatible chemistries: wax or PE for one, fluorochemicals for the other. How today's dual-barrier coatings work.
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Do you know your Cobb value? You're probably paying for the wrong one
Choosing the right target Cobb value is the most important cost decision in barrier packaging: don't over-specify, don't fall short. A practical guide with real-world ranges.
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