Thermoforming vacuum packaging is an internal packaging method using two rolls of film. Its process consists of heating to form bottom film into tray-like cavities, loading products onto them and sealing in a vacuum with the top film.
The process of thermoforming vacuum packaging machine, roll-stock type
Bottom Film
Forming die
Bottom film (thermoformed)
Bottom film (product-loaded)
Top film
Sealing die
Lengthwise cutting (Crosscutter)
Widthwise cutting (Rotary cutter)
Singular product (after two-way cutting)
- Bottom film
- Forming die
- Bottom film (thermoformed)
- Bottom film (Product-loaded)
- Top film
- Sealing die
- Lengthwise cutting (Crosscutter)
- Widthwise cutting (Rotary cutter)
- Singular product (after two-way cutting)
The thermoforming process begins from the bottom film ①. In the sealing die ②, the bottom film will be thermoformed (heated and formed) into tray-like cavity ③. After products are loaded on the bottom film ④, the top film ⑤ will match it. Products are sealed in vacuum or modified atmosphere in the sealing die ⑥. Later, products will undergo two-way cutting – lengthwise ⑦ and widthwise ⑧ into the individual pack ⑨.
Thermoforming vacuum packaging is an optimal method for internal packaging solution in mass processing line with of foods, high-tech or medical products and exporting goods with following reasons
The benefits from thermoforming vacuum packaging are
- Hygiene from vacuum sealing.
- Convenient storage and transportation.
- Visual transparency.
- Adaptability to modified packaging dimension
Hygiene from vacuum sealing
Air-expulsion itself can improve hygiene and shelf life. It is why thermoforming packaging is widely applied to food or food-ingredient processing lines. And the sealed products will gain bigger confidence if the reservation gas is flushed inside along with air-expulsion. It is what is called ‘MAP’ – Modified Atmosphere Packaging which we offer for the buyer’s option.
Convenient storage and transportation
Rectangular compact figure in tight seal makes storage and transportation easier in stacks.
Visual transparency
With optical transparency of the film, end-users can get visual information of the product in seal to get confidence in selection.
Adaptability to product appearance change
‘Within the forming die dimension’, it is adaptable to new size or appearance of product by substitution of ‘formers’ – the thermoforming patterns.