Projectile
The invention relates to a paintball projectile comprising a front portion and a body portion, which body portion comprises a side wall. The paintball projectile comprises a body component, which is a single piece forming outer surfaces of the front portion and the side wall, a closed cavity in the interior volume of the front portion, a fill in the closed cavity, and a middle component in the interior volume of the body component, the middle component having a first side and a second side. The first side of the middle component is facing the closed cavity, and the projectile further comprises a barrier layer on the second side of the middle component. The invention further relates to a method for manufacturing paintball projectile.
1. A non-lethal projectile comprising
a body component, which is a single piece having a uniform continuous structure forming outer surfaces of
a hemispherical front portion, and
a body portion comprising a side wall,
a closed cavity in an interior volume of the hemispherical front portion,
a fill in the closed cavity, and
a middle component in the interior volume of the body component, the middle component being a disc-shaped middle wall inside the body component, and the middle component having a first side and a second side,
wherein
the first side of the middle component is facing the closed cavity,
the projectile further comprises an open cavity in an interior volume of the body portion, and
the projectile further comprises a barrier layer on the second side of the middle component.
2. The projectile according to claim 1 , wherein the second side of the middle component is facing the open cavity,
and the middle component is placed between the hemispherical front portion and the open cavity.
3. The projectile according to claim 1 , wherein
the body component comprises a first biocomposite comprising first cellulose based fibers, and
the middle component comprises a second biocomposite comprising second cellulose based fibers,
wherein the first cellulose-based fibers differ from the second cellulose-based fibers.
4. The projectile according to claim 1 , wherein the body component comprises cellulose based fibers in a range between 20 wt. % and 60 wt. %, calculated from total weight of the body component.
5. The projectile according to claim 4 , wherein the cellulose based fibers of the body component comprise fibers from coffee grounds.
6. The projectile according to claim 1 , wherein the middle component comprises cellulose based fibers in a range between 5 wt. % and 25 wt. %, calculated from total weight of the middle component.
7. The projectile according to claim 6 , wherein the cellulose based fibers of the middle component comprise fibers from bamboo.
8. The projectile according to claim 1 , wherein the body component comprises at least one bioplastic selected from the group consisting of:
polylactic acid (polylactide) PLA,
thermoplastic starch,
polyvinyl alcohol,
biopolyester,
polyhydroxyalkanoate PHA, and
bioplastic originating from cellulose based material.
9. The projectile according to claim 1 , wherein the middle component comprises at least one bioplastic selected from the group consisting of:
polylactic acid (polylactide) PLA,
thermoplastic starch,
polyvinyl alcohol,
biopolyester,
polyhydroxyalkanoate PHA, and
bioplastic originating from cellulose based material.
10. The projectile according to claim 1 , wherein the barrier layer comprises shellac.
11. The projectile according to claim 1 , wherein the body component has a smooth outer surface.
12. The projectile according to claim 11 , wherein surface roughness of the outer surface of the front portion has an arithmetical mean deviation (Ra value) of equal to or less than 0.20 μm.
13. The projectile according to claim 11 , wherein surface roughness of the outer surface of the side wall has an arithmetical mean deviation (Ra value) of equal to or less than 0.20 μm.
14. The projectile according to claim 1 , wherein the side wall is a cylindrical side wall.
15. The projectile according to claim 1 , wherein the fill is water-based fill comprising non-toxic dye comprising
barium sulfate, and/or
laponite.
16. The projectile according to claim 1 , wherein
the middle component has a thickness in a range between 0.4 mm and 1.5 mm, and/or
the body component has a thickness in a range between 0.2 mm and 0.7 mm.
17. The projectile according to claim 1 , wherein the body component has supports on an inner surface of the front portion, and the middle component is supported by the supports.