GLF-900 Induction Sealer
An air-cooled in-line sealer for 15–60 mm necks at up to 200 bottles per minute.
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Continuous Induction Sealer
FNJ-1900 Large Continuous Induction Sealing Machine
A seal that no cap can replace. The FNJ-1900 uses an electromagnetic field to heat the aluminium foil disc inside each cap and weld it to the bottle neck in a fraction of a second, giving a moisture-proof, leak-proof and tamper-evident membrane. As a continuous machine it runs with the conveyor, so bottles are sealed at line speed rather than one at a time.
InductionSealing principle
FoilWeld to neck
ContinuousLine operation
3-in-1Seal, protect, prove
Induction Principle
Heat the Foil, Not the Bottle
Induction sealing is a non-contact process. The energy goes straight into the foil disc, so heat never has to travel through the bottle wall or the product.
01
Field
High-frequency alternating current in the sealing coil creates a rapidly reversing magnetic field under the head.
02
Eddy Current
The field induces circulating eddy currents in the aluminium foil disc held inside the capped bottle.
03
Heat
Electrical resistance in the foil turns those currents into heat within a fraction of a second, melting the polymer coating.
04
Bond
The molten coating fuses to the container neck, and the foil sets as a sealed, tamper-evident membrane.
- No direct contactThe head never touches the pack, so there is nothing to wear out against the cap and no risk of scuffing the closure.
- Cool containerOnly the foil heats, so the bottle and its contents stay at ambient temperature throughout the seal.
- RepeatableOnce the power and line speed are set, every foil disc receives the same treatment, which is what makes induction sealing so consistent in high volume.
Overview
Why Large Bottle Lines Choose Induction
For liquids, powders and granules, a foil membrane is the most reliable barrier that still opens with the cap. The FNJ-1900 brings that seal to a continuous conveyor.
Barrier Seal
The foil blocks moisture and air, stops leakage and keeps mould and contamination out of the pack.
Tamper Evidence
A bonded foil disc cannot be removed and refitted unnoticed, which reassures the buyer and protects the brand.
Continuous Line
Bottles pass under the head on the conveyor, so sealing keeps pace with filling and capping upstream.
Instant Heat
Energy is generated inside the foil itself, so there is no warm-up lag between packs on the line.
Broad Container Fit
Suits the plastic and glass bottles and the cap formats used across pharma, food and chemical packing.
Simple Consumables
The main wear item is the high-temperature cloth over the head, which is easily replaced on a set schedule.
Technical Data
FNJ-1900 Datasheet
The datasheet describes this model by principle and duty rather than by numeric limits, so the table below lists the parameters exactly as supplied.
| Parameter | FNJ-1900 |
|---|---|
| Model | FNJ-1900 |
| Sealing Principle | Electromagnetic induction |
| Heat Source | Eddy currents induced in the aluminium foil disc |
| Seal Type | Foil welded to the bottle neck under the cap |
| Contact | Non-contact; the coil never touches the pack |
| Sealing Effect | Moisture-proof, leak-proof, mould-proof |
| Tamper Evidence | Bonded foil membrane, visible if broken |
| Duty | Continuous line operation |
| Container Materials | PE, PP, PET, PS, ABS and glass |
| Not Suitable For | Metal bottles and metal caps |
| Main Consumable | High-temperature cloth |
| Typical Sectors | Pharmaceutical, agrochemical, food, lubricant, cosmetics |
Neck diameter, line speed and foil format are confirmed against your bottle before production. The machine must not be used on metal containers or caps.
Benefits
What a Foil Membrane Changes for the Pack
Induction sealing is not only about keeping the product in. It changes how long the pack can be stored and how the buyer reads it on the shelf.
- Longer shelf lifeBy sealing out moisture and air, the welded foil extends the storage period of the product inside.
- No leaks in transitA bonded membrane holds the contents even if the cap works loose during handling.
- Clean openingThe foil peels or pierces cleanly, so the pack is easy for the end user to open.
- Brand protectionA tamper-evident membrane discourages refilling and reassures the customer that the pack is untouched.
Material Fit
Which Container the Foil Will Bond To
Induction sealing depends on the foil disc, not on the bottle wall, but the container material still decides whether the process is safe and repeatable.
| Container | Typical Product | Cap | Suitability |
|---|---|---|---|
| PE and PP bottles | Liquids, powders, granules | Foil-lined cap | Supported |
| PET and PS bottles | Beverages, cosmetics | Foil-lined cap | Supported |
| ABS bottles | Chemicals, supplements | Foil-lined cap | Supported |
| Glass bottles | Oils, syrups, spirits | Foil-lined cap | Supported |
| Metal bottles or cans | Not applicable | Foil-lined cap | Not supported |
| Metal caps on any container | Not applicable | Metal closure | Not supported |
A foil disc must sit inside the cap for the seal to form. Send us the bottle and cap and we will confirm the foil format and the line speed.
Key Numbers
The FNJ-1900 in Four Figures
InstantFoil heat-up
ContinuousLine duty
3-in-1Moisture, leak, mould
Non-contactSealing head
Applications
Five Industries That Specify Induction Foil
The common factor is a bottled product that must stay sealed, documented and safe from tampering through a long supply chain.
Pharmaceutical
Syrups, suspensions and tablets in bottles where a sealed, tamper-evident barrier is a regulatory requirement.
Agrochemical & Chemical
Pesticides, fertilisers and lubricants where leakage in transit is both a safety and a cost problem.
Food, Beverage & Cosmetics
Sauces, oils, supplements and skincare in bottles that must reach the consumer fresh and untouched.
Operation & Care
Three Checks Before, Two Rules During
Induction sealing is easy to run well and easy to run badly. These are the steps that keep the seal consistent.
01
Clean Before Start
Clear the machine and the area around it before each run, so dust and product residue cannot reach the sealing head.
02
Check the Wiring
Confirm the plug, cable and screws are intact and tight; a loose connection is a common source of inconsistent power.
03
Inspect the Cloth
Make sure the high-temperature cloth is clean and undamaged, because it transfers the field evenly to the foil.
04
Hands Off the Cloth
Never place hands on the hot cloth during operation; the head reaches temperatures that cause burns instantly.
05
Daily Wipe-Down
Clean the surface every day so dust cannot build up on the head or the machine frame.
06
Replace Worn Cloth
Check on a schedule and change the high-temperature cloth promptly; a worn cloth gives a patchy seal.
Ordering & Support
What Comes With Every FNJ-1900
Shipping
Heavy double-layer packing, shipped by express, air or sea and trackable from the factory door.
Payment
T/T bank transfer and other agreed methods, with terms confirmed on the proforma invoice.
Warranty
A 2-year warranty covers parts and labour, with wear parts supplied quickly.
Commissioning
Remote guidance sets the power and line speed so the foil bonds evenly across the whole neck diameter.
- Lead timeAbout 5 working days for standard builds, plus roughly 4–6 working days in transit by express.
- Volume termsAgreed per order against quantity and destination — send your target volume and port.
- OEM & ODMFrame colour, nameplate and interface language can carry your brand.
- Sample testSend us your capped bottle and we will confirm the seal and the settings used.
FAQ
FNJ-1900 Questions
An alternating current in the sealing coil creates a rapidly changing magnetic field. That field induces eddy currents in the aluminium foil disc sitting inside the cap, and the foil heats within a fraction of a second. The polymer coating on the foil melts and bonds to the container neck, so the seal forms while the bottle itself stays cool.
The welded foil disc blocks moisture, stops the contents leaking and keeps mould and contamination out, which extends the storage life of the product. Because the foil is bonded under the cap, the pack is also tamper-evident: the seal cannot be opened and replaced without leaving a visible break.
It seals bottles in pharmaceutical, agrochemical, food, lubricant and cosmetics packing, including liquids, powders and granules. The continuous format suits large batch production where bottles move along a conveyor rather than being sealed one at a time.
Clean the machine and the working area first, then check that the plug, cable and screws are sound and that the high-temperature cloth over the sealing head is undamaged. A worn or dirty cloth is the most common cause of a weak or patchy foil seal.
Never put hands on the high-temperature cloth while the machine is running, because the sealing head reaches temperatures that will burn. After each run, tidy the machine and put it safely to one side rather than leaving it in the traffic path of the line.
Wipe the surface daily so dust does not build up, and inspect the machine on a set schedule. Replace the high-temperature cloth as soon as it shows wear, since a clean, flat cloth is what keeps the foil heating evenly across the whole neck diameter.
The machine is assembled and tested before dispatch and ships in heavy double-layer packing. Standard production is about 5 working days with express transit of roughly 4 to 6 working days. High-temperature cloth and other wear parts are supplied as consumables.
Related Models
Other Induction and Bottle Sealers
From a handheld head for small batches to a high-speed in-line system.
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A water-cooled console sealing 15–130 mm necks at up to 250 bottles per minute.
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GLF-500 Handheld Sealer
A 5 kg manual head for small batches and short runs on 28–65 mm necks.
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