Bottles and cans, one of the main products of glass, are familiar and popular packaging containers. In recent decades, with the development of industrial technology, a variety of new packaging materials have been manufactured, such as plastic, composite materials, special packaging paper, tinplate, aluminum foil, etc. Glass, a packaging material, is in fierce competition with other packaging materials. Because glass bottles and cans have the advantages of transparency, good chemical stability, cheap price, beautiful appearance, easy production and manufacturing, and can be recycled for many times, even if faced with competition from other packaging materials, glass products still have the characteristics that other packaging materials can not replace.
In recent years, people have found that edible oil, wine, vinegar and soy sauce in plastic barrels (bottles) will cause harm to human health through more than ten years of life practice:
1. If edible oil is stored in plastic barrels (bottles) for a long time, it will dissolve into plasticizers harmful to human body. 95% of edible oil in the domestic market is stored in plastic barrels (bottles). As long as it is stored (usually more than one week), edible oil will dissolve into plasticizers harmful to human body. Relevant domestic experts have collected plastic barrels (bottles) of different brands and different dates of delivery in the market to carry out experiments on soybean salad oil, blended oil and peanut oil. The test results show that all tested plastic barrels (bottles) of edible oil contain the plasticizer "dibutyl phthalate".
Plasticizers have certain toxic effects on human reproductive system, and are more toxic to men. However, because the toxic effect of plasticizers is chronic and not easy to detect, it has only attracted the attention of domestic and foreign experts after its widespread existence for more than ten years.
2. Wine, vinegar, soy sauce and other condiments contained in plastic barrels (bottles) are easily contaminated by ethylene which is harmful to human health. Plastic barrels (bottles) are mainly made of polyethylene or polypropylene and other materials and added with a variety of solvents. Polyethylene and polypropylene are non-toxic and have no adverse effects on human body when used for canned drinks. However, because plastic bottles still contain a small amount of ethylene monomer in the production process, if alcohol, vinegar and other fat-soluble organic substances are stored for a long time, physical and chemical reactions will occur, and ethylene monomer will slowly dissolve. In addition, wine, vinegar, soy sauce, etc. are contained in plastic barrels (bottles). In the air, the plastic bottles will be aged by the effects of oxygen and ultraviolet light, releasing more ethylene monomers, causing the deterioration and flavor of wine, vinegar, soy sauce, etc. stored in the barrels (bottles).
Eating ethylene contaminated food for a long time will cause dizziness, headache, nausea, loss of appetite, memory loss and other symptoms, and even lead to anemia in serious cases. It can be concluded from the above that with the continuous improvement of people's pursuit of quality of life, people will pay more and more attention to the safety of food. With the popularization and deepening of consumers' awareness of the harm to human health of edible oil, vinegar, soy sauce, etc. in plastic barrels (bottles), glass bottles and cans are beneficial to human health. Packaging containers will gradually become the consensus of consumers, and will also become a new opportunity for the development of glass bottles and cans.
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