The Library
The Library is every piece of content we publish, organized in one place: articles, the glossary, FAQs, the materials guide, and the Ask Rod video series.
Featured ArticleSeal Strength vs. Seal Integrity: What's the Difference?
A strong seal and an intact seal are not the same thing. Confusing the two is one of the most common reasons packaging fails in the field after passing every test on paper.
Glossary
30 terms defined in plain language.
FAQs
18 quick answers across general, materials, and troubleshooting topics.
Materials Guide
13 resin and film specs compared.
Ask Rod Videos
6 episodes of real-world answers.
Flexible Packaging Education
Foundational guides to how flexible packaging film is made, specified, and chosen.
Blown Film vs. Cast Film: Which One Do You Need?
Blown film and cast film are made on fundamentally different equipment, and that difference shows up directly in strength, clarity, and cost.
How to Read a Film Spec Sheet
A film spec sheet is dense with numbers, but only a handful of them actually predict whether the film will perform on your line.
Single-Layer vs. Multi-Layer Film: When Each Makes Sense
Adding layers to a film structure always adds cost and complexity, so the decision should be driven by a specific performance gap, not a general sense that more layers are better.
What Is Flexible Packaging, Actually?
Flexible packaging is defined by what it is not as much as by what it is, and understanding that distinction changes how you should specify it.
Packaging Problem Solving
Troubleshooting guides for seal failures, gauge variation, bubble instability, and other common film defects.
Diagnosing Inconsistent Seal Strength Across a Roll
When seal strength passes the test at the start of a roll and fails by the end, the cause is almost never the sealing equipment alone.
Gauge Bands: What Causes Them and How to Fix Them
Gauge bands are repeating thickness patterns around the bubble, and their repeating nature is the clue that points straight at the cause.
Seal Strength vs. Seal Integrity: What's the Difference?
A strong seal and an intact seal are not the same thing. Confusing the two is one of the most common reasons packaging fails in the field after passing every test on paper.
Why Your Film Keeps Curling on the Roll
Curl looks like a winding problem, but most of the time it starts upstream in the bubble, the gauge profile, or the resin itself.
Industry Expertise
Application-specific guidance for food, agricultural, medical, chemical, and retail packaging.
Choosing Film for Frozen Food Packaging
Frozen food film has to perform at temperatures and impact levels that most flexible packaging never sees, and that changes which properties actually matter.
Packaging Requirements for Chemical Drum Liners
A drum liner has one job that overrides every other consideration: keep the chemical inside from ever touching the drum or the outside world.
What Agricultural Mulch Film Actually Needs to Survive
Mulch film spends months in direct sun, soil contact, and field equipment abuse, and it has to fail on a schedule the grower controls, not on its own.
Why E-Commerce Poly Bags Need Different Film Than Retail Shelf Bags
A bag designed to look good on a shelf and a bag designed to survive a parcel network are solving different problems, even when they hold the same product.
Manufacturing Authority
How blown film is actually produced, tested, and quality-checked on a real production floor.
How We Quality-Test Every Roll Before It Ships
Quality testing on a film order is not one inspection at the end of the line; it is a set of checks distributed across the entire production run.
Inside a Blown Film Line: From Resin Pellet to Finished Roll
A roll of film passes through a half-dozen distinct stages between raw resin and finished rollstock, and each one leaves a fingerprint on the final product.
What Determines Lead Time on a Custom Film Order
Lead time is rarely just about how busy a production schedule is; it is driven by a handful of specific decisions made early in the order process.
Why Resin Blending Is More Art Than Recipe
Two extruders running the same published resin blend ratio can produce noticeably different film, because the recipe is only part of what determines the result.