1. A liner (100), the liner being shaped as a cone, frusto-cone, funnel or trumpet, for a
shaped charge (10) comprising an inner layer (120) made of a material having a density
below 10.5 g/cm3
, and an outer layer (110) made of a material having a density below
2.0 g/cm3 5 , wherein the outer layer is formed directly on the inner layer and wherein in
a first state, upon detonation of the shaped charge and collapse of the liner, both the
inner layer (120) and the outer layer (110) are arranged to be compressed towards the
symmetry axis (x) of the liner, thereby forming a projectile, and in a second state, the
inner layer is arranged to form a penetration jet (120’) of the projectile and the outer
10 layer is arranged to form a slug (110’) of the projectile, wherein the melting point of
the outer layer (110) is above 100 °C, preferably above 200 °C, most preferably above
300 °C, and the thickness of the outer layer (110) ranges from 0.5 mm to 5 mm,
preferably from 0.7 to 3 mm, most preferably from 0.9 to 2 mm.
2. The liner (100) according to claim 1, wherein the outer layer (110) has a density below
1.7 g/cm3
, preferably below 1.4 g/cm3 15 .
3. The liner (100) according to any of the preceding claims, wherein the inner layer (120)
has a density below 10.3 g/cm3
, preferably below 10.1 g/cm3
.
4. The liner (100) according to any of the preceding claims, wherein outer layer (110) is a
plastics material such as a thermoplastic polymer or a thermosetting polymer.
20 5. The liner (100) according to claim 4 wherein the thermoplastic material is
polytetrafluorethene, PTFE, or polyetheretherketone, PEEK.
6. The liner (100) according to claim 4, wherein the thermosetting polymer is
polyurethanes or epoxy.
7. The liner (100) according to any of the preceding claims, wherein the inner layer (120)
25 has a speed of sound of above 3000 m/s, preferably above 3450 m/s, most preferably
above 3900 m/s.
8. The liner (100) according to any of the preceding claims, wherein the inner layer (120)
comprises a metal such as copper, molybdenum or nickel or an alloy thereof.
14
9. The liner (100) according to any of the preceding claims, wherein the thickness of the
inner layer (120) ranges from 0.2 to 0.8 mm, preferably from 0.3 to 0.7 mm, most
preferably from 0.4 to 0.6 mm.
10. A shaped charge (10) comprising a liner (100) according to any of claims 1-9.