Tamper proof linings are essential for wholesale spice grinders, ensuring that your spices are able to stay as fresh as possible on the shelf after they have been packaged. The type and style of liner to use will often come down to your specific requirements as well as the content of the bottles. For spice grinder sets, other factors to consider include the material of the bottle. Plastic bottles and glass bottles have different properties that can impact the effectiveness of the lining. Liners are used for many purposes – to keep foods such as spices dry and fresh, to prevent leaks and to ensure consumer safety.
It’s always a good idea to consider liners in the costing of your final product. You may find that a pressure sensitive foam liner is a most efficient, cost-effective option, or you may find that induction seals are a better choice. In this handy guide, we compare the two main types of tamper lining to see the best option for spice grinders.
How to Seal Bulk Spice Grinders
The two types of tamper lining available as a value added service at Global Grinders includes the following:
#1 Pressure Sensitive Foam Liner
This type of liner works well for dry products, making it ideal for spices. The liner has an adhesive side that sticks to the grinder bottle, using pressure to secure the closer to the bottle. Once the closer is removed, the liner stays on the top of the container. This liner can be applied manually and works on both glass and plastic spice bottles. It is a cost-effective option for products that need to be sealed, as no additional equipment is needed to seal the bottle. This option does not work for liquid products however. Application areas need to be completely free of moisture, or otherwise the liner will not be able to adhere to the bottle. This liner has a shelf life of about six months – this is important to note when determining your packaging life cycle.
The primary benefits of pressure sensitive liners (also known as PS liners) include a very strong seal that keeps freshness in without the risk of air entering the bottle, along with the fact that once the liner is removed, it cannot be reapplied again.
#2 Induction Liners
Induction liners are comprised of multiple layers of pulpboard, wax and foil, with a polymer coating. A special induction machine is required to apply these liners. The machine melts the wax and polymer, creating a hermetic seal once it solidifies. There are two types of induction liner. One piece liners are made of a foam or paper packed laminate. After sealing, the entire liner is removed from the cap when the spice bottle is opened. Two piece liners have an added wax and pulpboard layer. During heating, the wax melts and absorbed into the pulp to release it from the foil liner. The pulpboard remains inside the cap. Liners include single or multiple pull tabs, or a lift and peel tab. During sealing, a foil laminate inner seal is bonded to the lip of the bottle. Once the bottle is filled with spices and capped with this type of liner, it is passed through the sealing system.
This option is suitable for liquid and dry ingredients. The main benefits to this liner is that the liner cannot be reapplied to the container once it is removed, as well as the fact that an airtight seal is created. It is often best used on plastic spice bottles, as the heating process is better suited to plastic. Glass heats, making it potentially dangerous during the sealing process unless handled carefully.
Both of these tamper proof linings offer value to wholesale customers. To find out more about our full range of spice grinders and value added services, contact Global Grinders today.