Buying guide · 18 September 2026
PE vs PP vs paper valve bags: how to choose the right structure
A practical comparison of moisture barrier, strength, print, recyclability and cost — plus a decision table for common products.
Read the guideInsights
Notes from the valve-bag line.
Practical guides for buyers and engineers: how to choose a structure, specify a valve for your filling line and get print right on the first proof.
Featured guide
8 min read
8 min read
7 min read
Technical
How to specify a valve bag for your filling line
The eight inputs that determine valve fit, fill rate and leaker rate — and the checklist we use before quoting a custom bag.
5 September 2026
6 min read
Print & artwork
Valve bag printing: artwork, colours and proofing
How to prepare artwork for flexo-printed valve bags, choose colours on kraft paper, and avoid the most common proofing delays.
22 August 2026Have a specification question?
We answer with a bag, not a brochure.
Send the product, fill weight and line details. If a sample will answer the question faster, we will say so.
From reading to sampling
Put the guide to work on your product.
Share the product data sheet and filling line details. We will turn the general advice into a specific bag recommendation and sample plan.