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:
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. Use the conversion table below.
Generally our heat sealers can seal a range of material thicknesses from:25µ (micron) up to 250µ or 100 gauge up to 1000 gauge If you are unsure of the material send PackSealer a sample for us to test and identify the best heat sealer.
How many bags do you have to seal?
The type of sealer will depend on the number of bags you plan to seal;
low usage up to 200 per daymedium usage 200 – 5000 per dayhigh usage over 5000 per day
Which is the Best type of Sealer?
Impulse Heat Sealers
Impulse heat sealers- 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.Normally if your material is a clear (thermoplastic) plastic bag, if it is less than 150µ (600 gauge) and you require to seal two thicknesses then our standard impulse sealers will be suitable.
Hand Impulse Sealers - PSH RangeHand 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. The seal length is up to 500mm and the seal width is 2mm. These also come with cutters.
Foot Operated Impulse Sealers - PSF Range
Foot pedal operated sealers are great for medium usage they allow sealing to be operated with hands free to aid lifting or positioning your product. Most come with a floor stand and the working height is around 70cm so the operator can sit down. The seal width is wider than the hand sealers at 5mm giving a more aesthetic finish.
Double Foot Operated Impulse Sealers (X2)
These sealers have a heating element on both the top and bottom jaws which makes these sealers suitable for thicker material. 150µ to 250µ (600 to 1000 gauge) and some foil pouches or bags.
Automatic Foot Switch Operated Sealer PSB PSF (A) RangeThese sealers are bench top mounted and have a foot switch. These can be set in an automatic mode to open and close at set intervals.
Direct Heat Sealers PSF (DD) rangeThe jaws of direct heat sealers or constant heat sealers heat up to pre set temperatures and are better suited for bags and pouches products having different properties and melting points, such as; foils (side gusseted foil coffee pouches), waxed, coated papers, cellophane and polypropylene laminates. These make a deeper seal of 10mm and are crimped for increased strength.
Hulme MartinUK made sealers HM offer some more specialised sealers for applications such as medical, security, heavy duty.
AudionEuropean made for specialised applications including the very high automated continuous sealers.
Star UniversalUK made sealers Star offer some more specialised sealers for applications with a precise level of control - such as probe type vacuum sealers, medical, security, heavy duty.
If you still help, give us a call or send us your bags for us to test and we'll advise the best machine.