| There are two forms of medicine, solid and liquid. Liquid can be divided into water and gel suspension. It is natural to know that with medicine, in general, ordinary polyethylene (PE) plastic bottles can be used as fillers and some rubber suspension agents, but they cannot be used as packaging for medicated cream. Otherwise, the organic solvent of the medicine will penetrate the flight permit through the plastic wall. Therefore, this small program is used in medicine packaging plastic water bottles. Another type of plastic bottle or polyester (PET) bottle is different. The barrier effect of some organic solvents, so it is not only widely used in water and pharmaceutical packaging colloidal suspensions, but also in some pharmaceutical packaging. However, this material has some obvious disadvantages. Insufficient water affected by the first barrier, the packaging of pharmaceutical products is often easy to absorb water, which causes the medicine to fail to decompose in the environment. The newly revised national standard pesticide cream packaging that was implemented on March 1, 2001 is particularly relevant to restrictions. Second, polyester bottles will be miscible with certain insecticides and additives, feel soft, deformed, and more typical varieties including "dimethoate", "dimethylformamide (DMF) solvent", and so on. This is because of the shortcomings of the above two types of plastic packaging. In the late 1990s, the domestic market began to appear dedicated to medicinal plastic bottles. The so-called medicinal plastic bottles refer to the use of a special treatment process (or adding a special material ) At the same time, making the treatment plastic bottle in organic solvent can effectively prevent the penetration of EU pesticides, while retaining the original light weight, the change (form) of the plastic bottle itself, and the special plastic bottle that is not fragile. Generally speaking, cut plastic bottles can be roughly divided into three categories: 1. cut off 2 fluorinated bottles and 3 mixed obstacles.
Plastic bottles are not only widely used for packaging carbonated beverages, drinking water, fruit juices and tea beverages, but also the largest beverage packaging used today, and are widely used in food, chemical, pharmaceutical packaging, and many other fields. Plastic bottles are widely used in packaging, packaging coils, and beer bottles and PET plastics. However, when the materials were rejected, the production of tens of billions of PET bottles in the face of how to deal with China's problems was only one year. It is estimated that by 2005, more than 500,000 tons of pets will be used to make PET plastic bottles. It is introduced that the recycling of PET plastic bottles can not only solve the problem of environmental protection, but also can be used as a new type of raw material resources to alleviate the contradictory lack of pet raw materials in China. Yes, looking back on China’s 30 years of reform and opening up, although China has made great achievements in the economic field, it has also brought about very serious damage to China’s environment. Water pollution, air pollution, solid waste pollution, etc. Brings the shrinking of the Chinese economy. People are gradually aware of the problem, and accordingly put forward a series of measures such as sustainable development strategy of green GDP, circular economy strategy, and so on. It can be seen that the practical problems faced by recycled PET bottles in China are for environmental protection and resource protection, and sustainable development has a great profit.
Pharmaceutical plastic bottles have developed rapidly due to their superior performance, relatively low cost and adaptability to environmental protection, and competition with other packaging materials (glass, tin, PE, PVC, etc.) bottles, but their heat resistance is poor , Resistance, limited him in hot filling and application requirements for high air tightness, people and high attention. In the process of improving and improving its performance, polyester packaging has gained new development. One is to improve the heat resistance, which cannot be used for ordinary PET bottle juice, tea hot-filling packaging and other items. At present, three practical heat-resistant polyester bottles have been developed through research: heat-set bottles, which can be filled at 85°C. Requirements; common injection blowing equipment with high heat resistance for medicinal plastic bottles can meet the requirements higher than 80 ℃ hot-filled bottles, if they are heat-set and hot-filled, the temperature can reach above 90 ℃; and heat-resistant multilayer Compound aromatic esters, such as bottles, to improve heat resistance. Second, improve resistance. Although the gas protection performance is much higher than that of polyethylene, polypropylene and polystyrene plastics, for a fresh product, such as beer, wine and perfume products with stricter taste requirements, it still cannot meet the requirements. |
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