Heat sealers are used to seal a wide range of packaging products from food, pharmaceutical, hardware and other materials into thermoplastic bags. The heat sealed packaging ensures that your product is tamper proof, air and water tight and hygienic. There are two basic technologies for heat sealing machines; Impulse Heat Sealers and Constant Heat Sealers both types of machines are available as a hand heat sealer, portable hand held sealer, foot heat sealer, industrial heat sealer and band sealers.
Impulse Heat Sealers
Impulse heat sealing machines have one or two heating elements which are covered by a layer of PTFE or Teflon fabric type material which prevents the bag sticking to the sealer.
The heating elements are not continuously heated; heat is only generated only when the jaws are closed and current flows. When the bag is placed in the impulse heat sealer, the jaws are closed and pressure maintained for the time of the seal (while the light is on). Then pressure is held for about 2 seconds to allow the seal to cool.
Hand sealers are great for low usage and in some cases for medium usage they don’t take up much space and can be moved around easily. Many of the hand sealers incorporate the Impulse, With Cutter
Foot pedal sealers are great for low-medium usage they allow sealing to be operated with hands free to aid lifting or positioning your product, the .
Double Foot Operated Impulse Sealers (X2) have a heating element on both the top and bottom jaws which makes these sealers suitable for thicker material and industrial use.
Direct Heat Sealers
The jaws of direct heat sealers or constant heat sealers heat up to pre set temperatures and are better suited for bags and packaging products having different properties and melting points, such as; foils (side gusseted foil coffee pouches), waxed, coated papers, cellophane and polypropylene laminates. Many direct heat sealers are Crimp Heat Sealers giving a deeper seal of more than 10mm and are for increased strength.
If you require an industrial sealer the semi-automated heat sealer machine the Continuous band sealers can provide the solution which operate with a conveyor system for high volumes.
Packsealer has been established since 2000 and offers guidance in choosing the right heat sealer machine for your packaging, send us a sample bag and we will test it. We hold a complete range of spares for our own machines and other similar for ongoing support.
Vacuum Sealers combine the heat sealer with a vacuum pump to remove the air from your packaging.
Choosing a Sealer
What is it you are trying to seal?
Heat sealers are used to seal a wide range of products from food, pharmaceutical, hardware and other materials into thermoplastic bags. The heat sealed bag ensures that your product is tamper proof, air and water tight and hygienic. You may have a standard type of bag or pouch where the seal is just two layers or if your bag has a side gusset (like a coffee pouch) or a central folded seam then you may need to seal 4 layers.
What is the Material?
The bags or pouches can be single layer or multilayer one of which must be thermoplastic for example:
Polyethylene (PE, HDPE, LLDPE)
Polyvinyl Chloride (PVC)
Polyethylene Terephthalate (PT)
Note: Foil and craft paper pouches normally include at least one thermoplastic layer.
What is the size?
The width of the sealer depends on the maximum width of the bag you are sealing, always choose a sealer that is at least 20 – 50mm wider than the width of your bag, which ensures that the bag can be easily positioned without overlapping the ends of the sealer. A wider sealer is better!
The thickness of your material if important too, the thickness can be quoted in micro (µ), gauge, mm, or inches! – micron and gauge are the most common.
Generally our heat sealers can seal a range of material thicknesses from:
25µ (micron) up to 250µ or 100 gauge up to 1000 gaugeIf you are unsure of the material send PackSealer a sample for us to test and identify the best heat sealer.