Next i wanted to check whether induction sealing works on glass bottles. Induction sealing is a method that is already used in the factory (see factory visit post) with their plastic bottles, and i thought that i could use this type of seal in my designs.Upon further research i have established that this method of sealing is possible on glass bottles.

So now i will explain how i want to incorporate induction seals into my design. Here is a sketch of the bottle lid and its expanded components:

Bottle Lid


The reason i want to use an induction seal is because the sauce needs some sort of portion control, on the existing bottle the plastic lid has a smalled hole built into it, meaning that it only pours a certain amount at a time, so you dont use too much of it. I thought that this was an essential element that needed to be carried over, because if i was to just use a cork lid, the users would be constantly having trouble pouring the right amount, and inconvenience isn’t an element you want to build into a product. And i didn’t to use too many materials, so i thought that a small induction seal could be built into the neck of the bottle. It has two purposes: sealing and portion control. Obvious the product needs to be sealed after it is produced to ensure it meets hygienic standards. In terms of portion control i thought the seal could add a personal element to the bottle, meaning that the seal allows the individual to pierce their own hole, as big or as small as they want depending on how much sauce they prefer to use at one time. After they have pierced the seal, the cork then serves as the seal, restricting the flow of air in and out of the bottle in a natural, traditional way.

In terms of the technicalities of the seal, they work by the seal being placed in (or usually on top) of the bottle, which then passes under an induction coil which emits an electromagnetic pulse. This creates a reaction in the seal which heats a polymer around the edges, which when cooled forms a bond to the bottle. I thought that if the seal is placed underneath the cork, and the cork is push into the bottle, then passed under the induction coil that the seal would adhere to the bottle around the inside of the bottle neck, then, theoretically the cork can be taken in and out and the seal stays in place.

In terms of sustainability, i thought you could slightly modify the seal so that is is made of only aluminium foil and the adhesive polymer so that is it easy to recycle (aluminium being a highly recyclable material). And that there could be a tab built into the design that that when the bottle is finished you can pull the tab and the seal comes out, easily separating from the bottle so that they can be recycled individually.

In general i like the idea of a cork and seal combination, as it suits the original and genuine feel of the product, as well as supporting the sustainable cork industry, and the seal adds a contemporary element to the lid, which adheres to hygienic standards important in todays society.