Saturday, January 21, 2012

Biodegradable bags

One policy that is being taken into account in achieving a reduction in the space occupied by our waste is waste separation, a task that is fundamental to efficient recycling so we can give a new use of our waste In addition to using environmentally friendly materials that are more resistant to being degraded.

This replacement is occurring also in plastic bags, a trend we are seeing more in the markets and shops in particular, where they are replaced with biodegradable materials, concepts that may not be very clear, but delve below.
Biodegradable Plastic

Biodegradable is defined as any product or substance that can be decomposed into its chemical elements through the action of external agents, such as plants, animals, microorganisms and fungi under natural environmental conditions (usually used for energy production, new fabrics and even new organisms)

Biodegradable Plastic called as it is then manufactured using materials that meet this condition, renewable sources being used (remember that the common plastic comes from oil and other fossil fuels) that at the end of its useful life and are finally discarded when allowed to be degraded in a very short period of time.

With respect to Europe, legislation has been implemented European EN 13432 which shows the requirements and procedures that determine the biodegradability of this material, and ensure its suitability for composting that allows further processing into fertilizer for plants .

Raw Materials and Manufacturing

Plastic bags biodegradable organic raw materials coming from renewable sources, preferably being used potato starch, as it has a very broad wealth Starch, also present in wheat or corn, a natural polymer.

But you prefer the potatoes from because it is the greatest performance generated regarding crops per hectare, it requires high consumption of water, and has short life cycles and closed rapidly becoming fertilizer.

The production starts when subjected to the starch derived from microorganisms through a process of chemical transformation to derive the lactic acid molecule which is the basis for the development of a polymer of polylactic acid.

This polymerization gives rise to a biodegradable plastic sheet which can then be subjected to injection molding, extrusion and thermo-transformation may be malleable in the same way that plastics and other petroleum products with similar physical and chemical properties.

This allows not only a decrease in the use of nonrenewable resources such as petroleum products, but also contribute to the problem of waste with a strong policy and unaltered to our daily lives.

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