Sealing machines
Plastic Bag Sealing Machine
'Plastic bag' is the widest description of all, and it is the one most likely to hide a problem - because several things people call plastic bags will not heat seal at all.
The machines here are the same family as every other page in this cluster: impulse or band, in hand, foot, table top or continuous format. What this page is really about is the material, because that is what decides whether any of them will work for you.
Heat sealing works by melting two surfaces so they fuse into one. That requires the inside faces of the bag to be a thermoplastic that melts at a temperature the machine reaches, and not everything sold as a plastic bag qualifies.
What seals readily
Polythene in its usual forms - LDPE and HDPE - is the easiest material there is. Almost any bench sealer will close it, and the only real decisions are thickness and width.
Polypropylene bags seal too, though they generally want a slightly different setting and are less forgiving if the time is too long. Most laminated pouches used for food have a sealant inner layer chosen precisely so they will close on machines like these.
What does not, or not reliably
Being clear about this saves wasted purchases, and it is the reason we ask for a sample rather than a description.
- Paper and paper-lined bags - there is nothing to melt. These are closed by stitching, gluing or a fold-and-tape.
- Foil without a sealant layer - the foil itself does not fuse.
- Woven sacks - PP woven bags for grain, cement and fertilizer are stitched or closed with a bag closer, not heat sealed, unless they carry a laminated liner.
- Some recycled and filler-heavy films - these can behave unpredictably from one batch to the next, which is worse for a production line than a film that simply does not seal.
Non-woven and jute-look bags
The bags handed out at exhibitions and shops that look like cloth are usually non-woven polypropylene. Some grades will heat seal and some will not, and it depends on the grade rather than the appearance.
If this is what you are packing, a sample is not optional - it is the only way to answer the question.
The rest of the decision
Once the material is settled, the choice is the same as anywhere else in this cluster: seal length longer than your widest bag, and a format that matches your daily count and whether the bag needs both hands.
Send the bag width measured flat, a sample or photograph of the material, and your daily count, and the recommendation follows from those three.
How to test a material before you commit
You do not need a machine to find out whether your bag will heat seal. There is a rough test anyone can do in five minutes, and it will tell you which conversation you are having.
Take two pieces of the bag material, lay them together, put a sheet of baking paper over them so nothing sticks to the iron, and press a household iron on a low setting across them for a couple of seconds. If they fuse into one and tear as a single piece when pulled, the material is thermoplastic and a sealing machine will close it. If they peel apart cleanly, or scorch without joining, it will not, or it needs far more heat than a bench machine gives.
It is not a substitute for sending a sample, and it will not tell you the right setting - an iron has none of the control a machine has. What it does is tell you within minutes whether you are shopping for a heat sealer at all, before anybody quotes you one.
If the test is ambiguous, that itself is useful information: ambiguous materials are exactly the ones we ask to see before quoting.
Bag sizes, shapes and formats
The film decides whether a bag seals; the shape decides how. A flat pillow bag lies across the bar and closes in one press, as long as its mouth is shorter than the bar. Gusseted and stand-up bags have folded sides, so the mouth must be flattened evenly or the fold becomes a weak spot. Filled bags that will not stay square, such as 5 kg atta packs, are easier on a foot sealer, where both hands hold the bag. Large bags and liners beyond 23 inch need a longer bar than any hand model.
Every bag format is walked through on the bag sealing machine page.
Plastic sealing machine sizes: 8 to 24 inch
Pick a bar longer than the mouth of your widest bag laid flat. The table gives each Standard hand size with the widest bag it closes in one press and its rate; every size also comes as a Heavy Duty model for all-day work.
| Size | Bar | Widest bag | Rate (ex-GST) | GST 18% | Total |
|---|---|---|---|---|---|
| 8 inch | 200 mm | 190 mm | ₹1,348 | ₹243 | ₹1,591 |
| 10 inch | 250 mm | 240 mm | ₹1,573 | ₹283 | ₹1,856 |
| 12 inch | 300 mm | 290 mm | ₹1,873 | ₹337 | ₹2,210 |
| 16 inch | 400 mm | 390 mm | ₹2,687 | ₹484 | ₹3,171 |
| 20 inch | 500 mm | 490 mm | ₹2,999 | ₹540 | ₹3,539 |
| 24 inch | 600 mm | 590 mm | ₹5,425 | ₹977 | ₹6,402 |
Rates before GST, GST and total, free delivery across India. This data was last updated on .
Plastic sealing machine or bag sealing machine?
Both names are used for the same machines. “Plastic sealing machine” is usually typed by someone thinking of the material, “bag sealing machine” by someone thinking of the pack. On this site the material question – which plastics heat seal – is answered on this page, the bag shapes and formats on the bag sealing machine page, and thin polythene covers on the polythene sealing machine page.
For bags above 23 inch, the FS Series foot sealer comes in 650 and 800 mm, and a steady stream of bags is a job for a band sealer.
Send us your bag, not a model number
Questions we are asked about this
Will it seal a woven PP sack?
Not a plain woven sack - those are stitched or closed with a bag closer. A woven sack with a laminated liner is a different case; send a sample.
Can it seal a non-woven carry bag?
It depends on the grade rather than the look. Send a sample - there is no honest answer from a description.
What about paper bags?
Heat sealing needs something that melts. Paper bags are closed by other means, and we will tell you so rather than sell you a machine for it.
How do I know which plastic my bag is?
Your bag supplier will tell you, and a sample settles it in any case. Post us a few empties with the enquiry.
Can I check whether my bag will seal before buying?
Roughly, yes - press two layers together under baking paper with a household iron on a low setting. If they fuse into one piece, a machine will seal them. Send us a sample either way.
The machine, by the name you know it as
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PackForge 8 Inch Impulse Sealer (Standard)
PackForge 8 Inch Impulse Sealer (Heavy Duty)
PackForge 10 Inch Impulse Sealer (Standard)
PackForge 10 Inch Impulse Sealer (Heavy Duty)
PackForge 12 Inch Impulse Sealer (Standard)
PackForge 12 Inch Impulse Sealer (Heavy Duty)
PackForge 16 Inch Impulse Sealer (Standard)
PackForge 16 Inch Impulse Sealer (Heavy Duty)
PackForge 20 Inch Impulse Sealer (Standard)
PackForge 20 Inch Impulse Sealer (Heavy Duty)
PackForge 24 Inch Impulse Sealer (Standard)
PackForge 24 Inch Impulse Sealer (Heavy Duty)