The Problem
The main advantage of this invention is that it is good for the environment:
The most harmful type of pollution which is damaging to the environment is the use of bottles and plastic containers for packaging of liquids and other foodstuffs and chemicals. These types of bottle and plastic containers not only cause environmental pollution, but also endanger the lives of all creatures, and contaminate the water supply. Although these products are sorted as recyclables and are placed in special boxes after use, yet deep in nature this is just the beginning of a devastating and fatal experience for various species of animals. Clearly, this volume of plastic waste can have a devastating effect on nature and bring about long-term problems for plants, animals and humans.
Ref: https://patents.google.com/patent/WO2020021302A1/en
Furthermore, it states the use of Polyvinyl alcohol (PVA):
Solution to Problem
[0025] The best solution to overcome all the problems resulting from use of plastic · containers is to use materials that are environmentally friendly. Bottles and containers made from degradable materials can rapidly degrade in soil, so they do not generate environmental effects, and since these products do not interact with food, so they can be used for packaging food, liquids, Oils and even chemicals. Because of the nature of the ingredients composing (polyvinyl alcohol), chemical toxic substances do not enter into food which is contained in biodegradable disposable bottles and plastics containers, so neither they endanger the health of individuals and nor do they pollute the environment. Polyvinyl alcohol (PVA) is a synthetic polymer soluble in water and has biodegradable property. In other words Vinyl alcohol monomers are weak and PVA is prepared by replacing the acetate · group in vinyl acetate with hydroxyl groups; which the presence of water or air humidity leads to its biological degradation.
[0026] Polyvinyl alcohol has a continuous process for production that results in production of a product with hydrolysis of over 80%. The degree of polyvinyl alcohol hydrolysis affects its properties, such as surface tension, compatibility, kinetics, rheology and solubility in water.
