A guide to thermoforming technology
Blister Carding
A preformed plastic blister is sealed onto a surlyn
coated card
Pros
- Relatively inexpensive for long runs
- Tamper evident
Cons
- When card and blister are torn
apart the blister is ‘contaminated’ with
the surlyn.
- Needs to go through a machine to be sealed so there are set up
costs.
- The card can become bent and torn whilst on display.
Clam Packs (folder blisters)
Double sided blisters that ‘clip’ together manually.
Pros
- Offer good product protection
- Card is encapsulated and protected within the pack so can be made
of thin material
Cons
- Tooling can be very expensive – especially
for high speed tooling
- The packs can be easily opened in store
- No tamper evidence
Welded (Heat Sealed) Blisters
Clam packs that are then welded together using RF or high frequency
welding machines.
Pros
- Gives good product protection
- Excellent security in store
- Card is encapsulated within the pack
Cons
- Set up costs can be extremely expensive (machinery and tooling)
- If the machinery is broken or demand exceeds capacity orders will
be delayed
Encapsulated (Trapped) Blisters
A preformed plastic blister is sealed between a double sided adhesive
card.
Pros
- No machinery is required for sealing process
- Tamper-evident
- As the card is double sided it is stronger and less prone to damage
Cons
- The card is expensive
- The product and card are not protected as much as they are in a
clam pack.
VIRTUWELD® Folding Blisters
These packs look and feel like welded blisters but feature a patented
manual closure mechanism to give added security without additional
cost!
Pros
- Gives good product protection
- Gives additional security
- No automated sealing or machinery is required
- Card is encapsulated within the pack
- Large range of styles and sizes available from stock
- Innovative, eye-catching designs.
- Manufactured from recycled material
Cons
- None that we can think of!
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