Plastic bags are a bag made of nitrifying fiber as the main raw materials. They are indispensable items in peoples daily life. They are often used to install other items.Plastic bags are cheap, light weight, large in capacity, and easy to store, but the production and use of plastic bag degradation cycles and difficulty in processing difficulties are prohibited from production and use.So what is the harm of plastic bags?What are the characteristics of plastic bags?Lets take a look today.
Features of plastic bags
Plastic bags are a bag made of nitrifying fiber as the main raw materials. They are indispensable items in peoples daily life. They are often used to install other items.The advantages of their cheap, extremely light weight, large capacity, and convenient storage are widely used, but some countries are banned from production and use because of the shortcomings of plastic bag degradation cycles and difficulty in processing difficulties.While plastic brings convenience to peoples lives, it also brings the environment that is difficult to clean up. People call the disaster caused by the plastic to the environment as "white pollution".Many countries take the method of incineration (thermal energy regeneration) or re -processing manufacturing (product regeneration) to deal with waste plastic.These two methods have regenerated the waste plastic and achieved the purpose of saving resources.However, because abandoned plastics will cause harmful gases to the human body and pollute the environment when incineration or processing, it can be said that the treatment of waste plastics is still a big problem in environmental protection work.
Harm of plastic bags
1. Destroy immunity.Some plastic bags and paper lunch boxes add some white agents and fluorescent powder. In addition to potential carcinogenicity, they also destroy the human bodys immunity.
2. Causes blood system diseases.Polyvinyl chloride contained in non -food plastic bags is prone to harmful substances such as villain after high temperature, causing liver and kidney and central nervous system and blood system diseases.
3. Cancer.The ingredients of plastic bags for food are mostly polyethylene. As long as it is below 110 degrees Celsius, it is not easy to break down, so when the temperature does not exceed 100 degrees Celsius, it is generally no problem.But the fried foods such as the fritters are far more temperature than the tolerance temperature of the food bag, which may cause the production of harmful substances.Light may be dizzy, nauseous, and may cause carcinogenesis.
4, cause bile and kidney stones.Unqualified plastic bags contain industrial calcium carbonate and paraffin.Calcium carbonate can cause constipation or gallbladder and kidney stones; paraffin can make people diarrhea.
5. Influencing intelligence.If heavy metals in plastic bags exceed standards, it will affect blood system and intellectual development.The annual output of plastics in the world is 100 million tons. If calculated by 15 % of the annual plastic waste, the worlds annual plastic waste volume is 15 million tons, Chinas annual plastic waste is more than 1 million tons.The proportion accounted for 40 %, and such a large amount of waste plastic was buried underground as garbage, which undoubtedly put greater pressure on the farming land that was originally lacking.
Ingredients of plastic bags
1. Synthetic resin
Synthetic resin is the most important component of plastic, and its content in plastic is generally 40%to 100%.Because the content of large and the nature of the resin often determines the nature of plastic, people often regard resin as synonyms of plastic.For example, polyvinyl chloride resin mixes with polyvinyl chloride plastic, phenolic resin and phenolic plastic.In fact, resin and plastic are two different concepts.Resin is an unprocessed primitive polymer. It is not only used to make plastic, but also coatings, adhesives and synthetic fiber raw materials.In addition to a small part of the plastic containing 100%resin, most of the plastics need to be added in addition to the main component resin.
2. Placement
Courisions are also known as filling, which can improve the strength and heat resistance of plastic and reduce costs.For example, adding wood powder to the phenolic resin can greatly reduce costs, making phenolic plastic one of the cheapest plastics, and at the same time, it can also significantly improve the mechanical strength.The filler can be divided into two types: organic fillers and inorganic fillers. The former such as wood powder, fragmented cloth, paper and various fabric fibers, etc., latter such as glass fiber, diatomite, asbestos, charcoal black, etc.
3. Planted agent
Plastic agents can increase the plasticity and softness of plastic, reduce brittleness, and make plastics easy to process.The plasticizer can generally be mixed with the resin, non -toxic, odorless, and organic compounds for high -boiling points with light and heat stability. The most commonly used is phthalate.For example, when producing polyvinyl chloride plastic, if more plasticizers are added, a soft polyvinyl chloride plastic can be obtained.Essence
4. Stabilizer
In order to prevent the decomposition and destruction of light and heat during processing and use of synthetic resin, and extend the service life, the stabilizer should be added to the plastic.Commonly used are hard fatty acid salt, epoxy resin, etc.
5, color agent
Coloring agents can make plastic have a variety of bright and beautiful colors.Common organic dyes and inorganic pigments are used as color.
6. Lubricant
The role of lubricant is to prevent plastic from not sticking to the metal mold when forming, and at the same time, the surface of the plastic can be smooth and beautiful.Common lubricants include hard fat acid and its calcium magnesium salt.In addition to the above -mentioned additives, flame retardants, foaming agents, antistatic agents, etc. can be added to the plastic to meet different use requirements.

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