Currently, the main shopping bags in markets are: plastic shopping bags, non-woven shopping bags, paper shopping bags, cotton shopping bags and shopping baskets. Which can be called truly reusable shopping bags?
For the definition of green shopping bag, the popular talk is shopping bags from the material of the raw materials to the manufacturing process does not pollute the environment, the product can be recycled easily decompose under natural conditions ultimately discarded or no pollution to the reusable bag. Analyzed and compared, in accordance with this concept for all kinds of shopping bags on the market today, who are more environmentally friendly, naturally clear.
Plastic shopping bags are a polyolefin as the main raw materials, addition of other substances made packaging materials. According to the plastic limit the provisions of the plastic bags standard plastic shopping bags are divided into three ordinary plastic shopping bags, degradable plastic shopping bags, and starch-based plastic shopping bags. Of these, only degradable plastic bags, divided into the photodegradation and biodegradation of two kinds.
Non-woven fabrics in fact, non-woven fabric is made of plastic, a lot of people thought called cloth is a natural material, in fact, is a misunderstanding. Commonly used non-woven material is polypropylene or polyethylene terephthalate, polypropylene with polyethylene plastic shopping bags used to belong to the five common plastic varieties, belonging to 50 years can not be degraded plastic varieties. Therefore, non-woven fabrics made of shopping bags from the essence that is also typical species as raw material polypropylene, also belong to the plastic bags, environmental protection and ordinary plastic shopping bags are not completely degraded.
In terms of specific cost-effective, nonwoven bags under the same conditions as strong as plastic bags, but not waterproof, its price was higher than the plastic bags several times as much. Also need to mention that the use of materials in two or more non-woven shopping bags, recycling is more difficult than ordinary plastic shopping bags.
Strength and water resistance of the paper is not good. A lot of water-based products such as seafood packing, heavy metal products are also difficult to load-bearing. First, the manufacture of paper raw materials wood-based, the world's forest resources are extremely scarce, this is the biggest waste of environmental resources; followed by the paper manufacturing process will produce a lot of water pollution. In addition, according to expert analysis, paper bags in the natural environment degradation, energy and resources consumption and environmental pollution caused by the papermaking process is more serious than the plastic shopping bags. According to the statistics of the American chemical society, the raw material for manufacture of grocery plastic bags required 40% less than recycle PET reusable bags, one pounds of plastic needed for the production of energy more than 1 pound of paper production needs less energy to 91%, compared with plastic, paper bags The manufacture and use of more than 70% of gas emissions. Therefore, a large paper bag is the biggest waste of environmental resources and environmental pollution.
The strength of the cotton shopping bags, paper bags, can be recycled, but the poor water resistance. The advantages of cotton shopping bags can be recycled, but the cloth bag is dirty? Washing is the most common way, but washing the waste of water resources, pollution of soil phosphorus detergent will ordinary washing and disinfection of bacteria.
There are shopping baskets with two materials: one is a natural rattan material and another is polypropylene plastic materials. The first one use the natural vegetation as raw material and a large number of logging will damage the natural environment. The second uses plastic as raw material. The environmental protection is the same with ordinary plastic shopping bags and non woven bags. The main disadvantage of shopping basket is inconvenient to carry.Source:http://www.cnmhc.com
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