Biodegradable bottle for liquids
A bottle for holding liquids that is biodegradable and that is made from environmentally sustainable materials. The bottle includes a body, a shoulder, a neck portion, and a cap. According to one aspect, the neck portion of the bottle is made of bioplastic, and the shoulder and body of the bottle are made from thermoformed pulp. The bioplastic neck can mate with, and be adhered to, the shoulder, and the shoulder can mate with, and be adhered to, the pulp body.
1. A method of manufacturing a container for liquids, comprising:
forming a pulp shoulder and pulp body having an inner surface by thermoforming from a paper pulp slurry;
creating a liquid barrier on the inner surface of the pulp shoulder and pulp body,
wherein creating the liquid barrier is by spraying and drying a sealant onto the inner surface of the pulp shoulder and body;
injection molding a neck portion, wherein the neck portion comprises a bottom portion of a dome, conical, or square shape, the bottom portion comprises a ridge along an outer surface of the neck portion; and
attaching the pulp body with the neck portion such that an upper periphery of the pulp shoulder resides over at least a portion of the bottom portion below the ridge along the outer surface of the neck portion,
wherein the inner surface of the pulp shoulder having a shape identical to the shape of an overlapping part of the bottom portion,
wherein the upper periphery of the pulp shoulder abuts against the ridge; and
bonding the neck portion to the pulp shoulder.
2. The method of manufacturing a container for liquids of claim 1 , wherein the sealant is selected from the family of polyvinyl alcohol (PVA) polymers, or a bioplastic.
3. The method of manufacturing a container for liquids of claim 1 , further comprising trimming the pulp shoulder and pulp body.
4. The method of manufacturing a container for liquids of claim 1 , wherein the neck portion is made from a bioresin material.
5. The method of manufacturing a container for liquids of claim 4 , wherein the neck portion is made from polylactic acid (PLA).
6. The method of manufacturing a container for liquids of claim 1 , wherein bonding the neck portion to the pulp shoulder is by using an adhesive.
7. The method of manufacturing a container for liquids of claim 6 , wherein the adhesive is not soluble in water, but is biodegradable and repulpable.
8. The method of manufacturing a container for liquids of claim 1 , wherein bonding the neck portion to the pulp shoulder is through a heat sealing process.
9. The method of manufacturing a container for liquids of claim 8 , wherein the heat sealing process comprising inserting the neck portion and the pulp shoulder into a jig; closing a heated press tool on the attached neck portion and pulp shoulder; and applying pressure and heat.
10. The method of manufacturing a container for liquids of claim 8 , wherein the heat sealing process comprising introducing a heat activated adhesive.
11. The method of manufacturing a container for liquids of claim 1 , wherein the pulp shoulder and the pulp body are formed as an integral component.
12. The method of manufacturing a container for liquids of claim 1 , wherein the pulp shoulder and the pulp body are formed as separate components.
13. The method of manufacturing a container for liquids of claim 12 , wherein the pulp shoulder and the pulp body are attached by using an adhesive.
14. The method of manufacturing a container for liquids of claim 13 , wherein attaching the pulp shoulder and the pulp body is before creating a the liquid barrier on the inner surface of the pulp shoulder and pulp body.