What Is Poly Tubing? Flexible Packaging on Demand

Poly tubing is one of the most versatile products in the plastic packaging world — and a staple offering here at M Plastics. It’s essentially a continuous roll of plastic film that’s open on both ends and sealed only when the user is ready, offering a made-to-fit solution for items of varying lengths or sizes. 

In this post, we’ll break down what poly tubing is, why it’s used, and how blown film manufacturers like us make it to suit different applications. 

What Is Poly Tubing?

Poly tubing is a long, uncut tube of polyethylene film wound onto a roll. Users can cut it to any length and seal one or both ends using heat sealers, tape, or twist ties. It comes in various widths and thicknesses, and can be plain or printed.

Think of it as a “bag on demand” system — you create the size you need when you need it.

Common Uses for Poly Tubing

Poly tubing is ideal when packaging items of: 

• Varying lengths 

• Irregular shapes 

• High volume with mixed sizes 

It’s commonly used for: 

• Tools, metal rods, pipes

• Industrial components

• Textile rolls

• Art prints or posters

• Agricultural packaging

• Storage and shipping protection

• It also works well on automated bagging equipment in high-speed operations. 

How We Manufacture It at M Plastics

At M Plastics, poly tubing is made in-line through our blown film extrusion process. Here’s how it works:

• Resin is melted and extruded through a circular die. 

• A tube of film is formed, inflated with air, and cooled. 

• The film is collapsed and wound onto rolls at the desired width and thickness. 

• Rolls are boxed and labeled for shipping or will-call. 

• Because the tubing is uncut, there’s no waste from pre-sized bags — and customers only seal what they need. We also offer custom gauge blends for strength or clarity, depending on application.   

Why Customers Choose Poly Tubing

• Flexible length – no need to stock multiple bag sizes 

• Cost-effective – lower per-unit cost when high volume is needed 

• Low waste – only use what’s needed 

• Printable – great for logos, part numbers, or instructions 

• Strong & clean – extruded in controlled environments for industrial reliability 

Final Thoughts

 If your operation requires flexible packaging that adjusts to product size or batch variation, poly tubing is the answer. At M Plastics, we’ve been supplying blown film tubing to manufacturers, distributors, and OEMs for nearly two decades — always focused on consistent quality and lead time.