Often there are clients packaging a “pure” merchandise that they are generally packaging in Glass.
They needed tamper proof seal that doubles as quality seal and were equally worried about some seeping challenges. For dry products like supplements or powders, there are many better alternatives out there. Take for example coffee which is often packed in glass and possesses a foil quality heat seal across the opening of the Jar.
Wet and greasy products cannot utilize induction sealing. The heat sealing process in induction sealing uses a layer of material laminated to the foil becoming “wet” when it is heated after which setting or drying as soon as the foil cools down. This sealing layer is usually plastic based for plastic bottles – that melts into the existing plastic of the bottle or container. For glass with extremely high melt temperatures the sealing layer never gets anywhere near hot enough to “melt” into the glass which means this sealing layer is commonly adhesive based. Wet products and oily products tend to leak into this seal following the sealing processprocess, at some point deteriorating or neutralising the adhesive and breaking the seal.
Most often than not, glass jars usually are meant to have metal caps which poses one other issue. In order to heat the seal, like established ealier, the induction sealing process relies upon heavily on a steady magnetic field work. Metal caps are more likely to take in heat sealing energy before the induction material which interferes with the seal.
Paradoxically, several makes of environmental or wellness based goods packed their products in glass as opposed to making use of PET packaging, comparable to their competitors, they are responsible for an even bigger ecological effect.
Focusing our concentration on the limitations lifted on induction sealing when you use plastic packaging, we will not enter into the debate of whether glass or plastic is advisable to package products.
There are several products that cross over from Glass to Plastic and so are using plastic packs that appear to be like glass but still possess metal lids. These products may be induction sealed using Capless induction sealing. Some steps is associated with carrying out this procedure: open, filled product passed beneath a sealing head that cuts a disc of sealing foil, put that foil in place covering the product’s opening after which heat seals that foil to the container. After that sealing machine process the package has its metal cap put in place.
With innovation, plastic packs that replicate the perception of glass are now built to have screw on sections. It is the mixture of a plastic bottle and a plastic cap that best lend themselves to the induction sealing machine process.
Not every hope is lost for pure product market that needs to have their products in glass with all the development of adhesives for the induction sealing layer which are suited to glass and resistant to wet and oily products. You’ll notice definitely a few glass sealing foils that perform much better than others and the most effective way to determine if your product will fit will be via trials. The more time you can carry out your trials and the more diverse conditions, such as temperature ranges and pressure ranges the more confident you can be that the induction sealing process is suited to your application.