Discussion on several sets of safety coats of pest

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Brief discussion: several sets of "safety coats" of pesticides in the packaging industry

pesticides generally have the characteristics of high concentration and high toxicity, which are very harmful to human body. Therefore, the safety of pesticide packaging is very important. After the use of pesticides, the environmental pollution caused by residual pesticides in their packaging can not be ignored

it is necessary to put an end to casualties caused by pesticides, from the selection of packaging materials and forms to the setting of label content to the recycling of waste packaging, and every link needs to be firmly checked

"plastic instead of glass" trend

two thirds of pesticides produced in China are liquid formulations. For a long time, liquid pesticides have been packaged in glass bottles. However, the glass bottle has some disadvantages, such as high breakage rate, loose sealing of the plug in the glass bottle and inconvenient measurement. Plastic containers have the advantages of portability, fall resistance, accurate measurement and low overall packaging cost. "Plastic instead of glass" has become an irreversible development trend of pesticide packaging. New types of plastic packaging, such as water-soluble packaging bags, high barrier pesticide bottles and other products came into being

water soluble packaging bags

water soluble plastic packaging bags are widely used in the packaging of pesticides in Europe, America, Japan and other countries, and are increasingly used in China

the water-soluble plastic packaging bag is made of water-soluble packaging film with polyethylene 1 with low alcoholysis and quality assurance enol as the main raw materials. When it is used to pack a certain dose of pesticide preparations, it only needs to put the required dose of medicine into a certain amount of water, and the packaging bag will dissolve automatically, and the medicine will be dispersed in the water immediately. On the one hand, users do not need to directly contact pesticides, avoiding the occurrence of poisoning; On the other hand, the measurement is accurate to avoid excessive or insufficient use of pesticides

as the raw material is thin film, the quality is very light, which not only effectively reduces the transportation cost, but also has no problems such as easy leakage and difficult recovery caused by the lax sealing of the cork. This kind of packaging with simple operation, safety and environmental protection has a broad application prospect

high barrier pesticide bottle

the ingredients of pesticides are very complex, and aggressive organic solvents such as toluene and xylene are often used. When storing pesticides in ordinary polyethylene bottles, there are often problems such as the penetration of pesticides from the container wall, the increase of the moisture content of pesticides in the container, and the cracking and deformation of the container. Therefore, high barrier plastic containers, including multi-layer coextrusion bottles and fluorination bottles, have attracted the attention of manufacturers. The inner layer of multi-layer coextrusion bottle is nylon or polyvinyl alcohol, both of which have excellent gas permeability resistance. The impermeability effect is dozens of times higher than that of ordinary polyethylene bottle, which greatly extends the storage life. The inner wall of the fluorination bottle is a fluoroplastic layer such as polytetrafluoroethylene, which can prevent the penetration of organic solvents and the degradation of products. In terms of the effect of barrier bottles, multi-layer co extruded bottles of 100ml and below are better than fluorinated bottles, but the larger the specification, the stronger the competitiveness of fluorinated bottles

packaging bottle with built-in meter

at present, most farmers do not use the meter when applying pesticides, and use the bottle cap of the medicine bottle to measure when taking drugs. However, the bottle cap has no metering function, and most of the drugs actually taken are 4) acquiesce in the default installation of the program to the directory c:program filesteststar; Because the windows system files installed on the C disk are on the high side

plastic packaging bottles with built-in meters, which are widely used in Europe and the United States, have solved this problem. When in use, just squeeze the medicine bottle by hand to make the medicine liquid rise into the meter through a liquid guide pipe. After reaching the required dosage, open the cover of the meter and pour the medicine directly into the water. The medicine will not touch the hands of the operators in the process from the medicine bottle to the spray, which is convenient, fast and very safe. In China, the R & D and application of this kind of packaging need to be further strengthened

pay close attention to the label

in addition to the casualty accidents caused by the damage or improper handling of the packaging container, sometimes the wrong dosage or method of pesticide use is also the cause of the accident. Therefore, as the carrier of pesticide product description, pesticide labels and instructions should be paid full attention

the regulations of the people's Republic of China on the administration of pesticides stipulates that in addition to the pesticide registration certificate number, production approval number and product implementation standard number, the label should also indicate the pesticide name, enterprise name, pesticide active ingredients, content, weight, product performance, toxicity, purpose, use method, production date, validity period and precautions

Common symbols of pesticide packaging

pesticide symbols marked on pesticide packaging and pesticide instructions are generally composed of 1 ~ 3 English letters, some representing pesticide dosage forms, and some representing pesticide measurement and concentration

in terms of pesticide dosage forms, "EC" refers to emulsifiable concentrate, which is the most common pesticide symbol. For example, "dimethoate" 40ec refers to dimethoate emulsifiable concentrate with a content of 40%; "Ol" refers to oil agent, such as "likeline ol" refers to likeline oil agent; "Es" refers to emulsion, emulsion, emulsion and emulsion; "WG" means dispersible granules in water; "LS" means solution for seed treatment, etc

in terms of pesticide measurement and concentration, "kg/ha" means kg/ha; "Ppm" refers to the concentration in parts per million. Now it is generally expressed in or mg/kg; "TLM" is an index for determining the toxicity of pesticides to fish; "LD50" means median lethal dose or half lethal dose

there are also some special terms for pesticides, such as "TM" refers to a registered trademark; "GLC" means gas chromatography; "IPM" means integrated prevention and control

the label should be popular and true

the content of the pesticide label should be popular, accurate and scientific, so that users can easily understand and master the correct use of the product; The content should be authentic and consistent with the content of product registration and approval

the name of the pesticide product should be indicated in bold characters and be placed in a prominent position throughout the label. In addition, the full name and content of the common name of each effective ingredient contained in the product, the corresponding international common name, etc. shall also be marked

the quality assurance period of pesticide products can be marked with 12% in any of the following three forms: Indicate the production date (or batch number) and warranty period; Indicate the product batch number and effective date; Indicate the product batch number and expiration date. The label of sub packaged products shall indicate the production date and sub packaged date of the products respectively

there are mainly three kinds of pattern marks on pesticide packaging. One is the pesticide toxicity mark, which shall comply with the relevant provisions of the national pesticide toxicity classification mark and mark; The other is the pesticide category characteristic color marker band, which is usually used to add an indelible pesticide category characteristic color marker band parallel to the bottom edge at the bottom of the label to represent different types of pesticides, such as herbicide is "green", insecticidal (mite, mollusc) agent is "red", etc; There is also a pictogram that facilitates the safe use of pesticides. It is usually printed in black and white and placed at the bottom of the label

strengthen packaging and recycling

according to statistics, there are about 3.2 billion pesticide packaging wastes in China every year. These pesticide packaging wastes are arbitrarily discarded in rivers and fields, polluting groundwater sources and causing great harm to human beings and the environment. How to deal with these packaging wastes in a timely manner, the performance of various composites is still not equal to the high load-bearing performance of carbon fiber composites, which is a top priority

for many years, the recycling of pesticide packaging waste has been difficult to carry out. The main reasons are as follows: China has no unified and standardized management system for the recycling of pesticide packaging waste; There are too many small pesticide production enterprises in China, and these enterprises are unable to recycle packaging waste; After recycling pesticide packaging waste, some enterprises also have many difficulties in the treatment process, such as some containers with broken bottle mouths can no longer be used, bottles and labels are quite difficult to clean, so enterprises are unwilling to recycle

some insiders proposed that comprehensive management of pesticide packaging waste should be carried out. First of all, on the premise of mastering the current situation of pesticide waste pollution and treatment in China, formulate effective laws and regulations in line with national conditions, and effectively bring the treatment of pesticide waste into the track of legalization. Secondly, five pesticide waste treatment centers will be established according to the regional division of East, West, North and south. In the region, select a pesticide production enterprise with strong strength, standardized management and a certain foundation for the treatment of pesticide packaging waste to help it improve the treatment capacity of pesticide packaging waste. Thirdly, in order to facilitate the cleaning and recycling of packaging recyclables, pesticide manufacturers have increased the use of high barrier plastic bottles and large-diameter bottle mouth plastic bottles

relevant personnel of the State Environmental Protection Administration also recently said that the Bureau has included the disposal of pesticide packaging waste into the environmental protection planning agenda, and it is believed that a standardized management system will be introduced soon

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