Bioplastics are the form of plastics derived from renewable biomass sources (vegetable oil, corn starch, or microbiota) rather than fossil-fuel plastics.
An article on bioplastics: http://www.time.com/time/magazine/article/0,9171,1983894,00.html
Waterproofing card:
How Professionals Waterproof Cardboard
- Because cardboard is paper, it is susceptible to humidity and water damage. Continual exposure to water causes the cardboard to become a soggy mess. In order to broaden the capability of cardboard and to fulfill water-resistant requirements from customers, manufacturers have created various ways of applying a waterproof coating to their products. These include laminating cardboard with plastic film, curtain coating (spraying) an exterior plastic coating to the cardboard, impregnating a wax coating or using a method called cascading, which saturates the cardboard with a hot wax substance. Wax is a petroleum-based product.
A New Waterproof Product
- Recent developments in waterproofing cardboard may soon render previous applications obsolete. The development of a biodegradable waterproof coating made from the pulp of sugar cane could change the face of the paper coating industry. The process involves removing the cellulose from the sugar cane and putting it through a fermentation process that preserves the lignin, which is the waterproof part of cellulose. Conventional paper-making methods destroy the waterproof characteristic of lignin in tree-based paper pulp. The new process would allow the recycling of treated cardboard, which is not possible with conventionally coated board. The result would be a huge reduction in the billions of tons of harmful cardboard waste found in landfills worldwide.
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