Bag Sealing 101

Bag Sealing 101
Whether you're packing coffee, snacks, industrial parts or medical supplies, a bag sealer (heat sealer) is one of the most essential tools in the packaging world.  But with so many models and options, it can be confusing to figure out which one is right for your application.   This quick guide will help you find the right sealer.

Keep products fresh and protected

Seal bags in seconds - ideal for small and large volumes

Creates clean uniform seals to elevate your packaging

Reduces waste and extend shelf life

What is a Bag Sealer?
 A bag sealer is a machine that uses heat and pressure to close and seal flexible packaging - like poly bags, pouches and or laminated films.

• The heating element warms up (either instantly or continuously) and seals the inner layer of the bag

• When pressed together under pressure, the two sides fuse

• After a short cooling period, the seal is secure, airtight and tamper-evident

When choosing a bag sealer, focus on matching your packaging material, material size and desired production quantity. These questions are important to answer to make sure the correct sealer is chosen.

Types of Sealers 
There are two types of sealers - impulse vs. direct heat

• Impulse - Ideal for standard poly bags (PE, PP)

• Direct Heat / Constant Heat Sealer - Ideal for thicker harder to seal materials like foil and coated bags

Impulse Heat Sealers
Impulse sealers are ideal for every day sealing.  The units require no warm-up time.

• Impulse sealers only use power when the microswitch is activated

• Ideal for every day poly bags (polyethylene or polypropylene)

• Seal widths:  Round (Shrink Wrapping), 2mm, 5mm, 10mm

• Require regular maintenance 

Direct Heat Sealers
Direct heat sealers maintain constant heat in both jaws.

• Uses power as long as machine is turned on

• Better heat penetration for thicker materials such as gusseted bags

• Seal widths:  8mm, 10mm, 15mm, 20mm

• CANNOT seal polyethylene

Type of Impulse Heat Sealers 

• Hand Sealers: Easy to use and economical

• Portable Sealers: Ideal for irregular sealing and lower volume

• Foot Sealers:  Activated via foot pedal to keep hands free to hold bag

• Automatic Sealers:  Provides most consistent seals with heat and cool settings

Type of Direct Heat Sealers

• Portable Sealers: Ideal for irregular sealing and lower volume

• Foot Sealers:  Activated via foot pedal to keep hands free to hold bag

• Table Top: Equipped with timer and foot pedal for consistent sealing

• Band Sealers:  Efficiently ramp up production as bags are carried on conveyor

Choosing the right sealers isn't just about the machine - it's about matching your packaging needs with the right sealing method.  The right sealer saves time and ensures a strong secure package every time.