PTFE for Plastic Bag Sealing Machines: Tape and Belts

Plastic bag sealing machines need protection on the hot jaws, or the plastic sticks and the seal fails. This guide explains how PTFE for bag sealing machines solves the problem, which options exist and how to choose. It is based on more than 10 years of supplying PTFE products to packaging and plastic bag plants in Egypt.

The problem without PTFE

A hot jaw seals two layers of plastic. Without protection, molten plastic sticks to the metal, leaves residue, and gives weak or uneven seals or tears the bag as it is pulled away. Operators also stop the machine often to clean the jaws.

The solution: PTFE tape or belt

Adhesive tape on the jaws

The fastest and simplest fix. PTFE tape sticks straight onto the jaw and is replaced in minutes. We supply 80 to 180 micron tape in widths from 10 to 100 mm and wider to order. See self-adhesive PTFE tape.

Solid pull belts

On machines that pull the bag through, a closed-loop PTFE belt carries the plastic between the jaws without sticking. It must be made to the machine size. See PTFE belts for packaging machines.

How to choose

• Fixed jaw machine: adhesive tape.
• Machine that pulls the bag: solid belt plus tape on the jaws.
• Thin film: thinner tape transfers heat faster.
• Heavy continuous use: thicker tape lasts longer.

Tell us the sealing temperature and film type and we will recommend a grade and thickness.

Fitting tape to a jaw

1. Let the jaw cool and remove old tape and residue.
2. Clean and dry the surface.
3. Cut the tape to length and width.
4. Peel the liner back gradually.
5. Stick the tape down and smooth it with a soft cloth to remove air bubbles.
6. Press firmly and let it settle before running.

Keeping seal quality high

Set temperature and pressure no higher than the film needs. Replace tape at the first sign of wear. Keep jaws clean. Hold a spare roll.

Why Egyptian PTFE Belts Company

We make to your size and deliver within 48 hours of order confirmation across Egypt, from 10th of Ramadan City. Contact us on +20 106 166 6730 or via our contact page.