Brief introduction to Wad, its type. Induction Sealing principle.

1. SHAKTI NADAR
PACKAGING DEVELOPMENT
CAVINKARE
Learning Session
WADS

2. Cork
2

3. Cork
3

4. Crown Cap
4

5. Plastic Cap
5

6. Wad
6
Ancillary Material:
 Airtight
 Leak proof
 Tamper proof

7. Types
7
 1 pc Wad
 Has only one layer
 2 pc Sealing Wad
 Divides into 2 parts

8. CONSTRUCTION
8
 Board / Foam
 Barrier film
 Wax coating
 Paper
 Al foil
 Polyester film
 Sealing film/coating

9. Induction Sealing
9

10. Principle
10
Induction Sealing :
When a conductive material like Al. foil is placed
under high frequency magnetic field, Eddy
Currents are produced in it by process of Mutual
Inductance which heats up the foil, which melts
the sealing film to form a seal against the lip of
the container.

11. Innovations
11
 PSA backing
 Breathable Wads
 Pierce through wads for powder
 Orifice modification

12. THANKS