Green food packaging starts from "benzene free printing"
the general guidelines for green food packaging, which has been implemented in China, clearly stipulates that expanded polystyrene, polyurethane and other materials are not allowed to be used in plastic products for packaging food; The outer packaging of green food shall clearly indicate the instructions for the use of materials, instructions for reuse and recycling, and green food signs; The printing ink or the adhesive for labeling the printed outer packaging of green food should be non-toxic and should not be in direct contact with food
these standards will fundamentally standardize food packaging, especially green food packaging, in order to improve its safety. The reason why green food packaging is particularly mentioned here is that consumers tend to ignore the new pollution caused by packaging while paying attention to green food itself, thus turning green food into "polluted food"
it has been found in some supermarkets that many vegetables are labeled with green food labels and packaged independently according to their weight. However, although these packages use degradable fresh-keeping film, the trays are disposable plastic products; Many cut fruit platters also use disposable foam plastic protective packages that are harmful to human health; A considerable number of high-quality rice with green food labels are also packaged in harmful plastic woven bags
according to relevant experts, at present, the plastic bags and plastic trays used in many grains, vegetables and other foods are made of PVC, which is not only toxic to human body, but also polluting the environment after use. Another example is that some businesses use a lot of whitened paper for food packaging. In the production process of these papers, in order to improve their whiteness, most of them are treated with fluorescent brighteners that are very toxic to humans and animals. It is particularly worth pointing out that many businesses like to use color wrapping paper today, causing greater pollution and harm. The color package is within a certain tolerance range. If the color ink containing excessive benzene in the paper is in direct contact with food, manager yuan of Jinan assay sales department may say that it is directly harmful to human health. Therefore, green food must prevent the use of "green food bags" printed with color ink containing excessive benzene
then, how to prevent harmful packaging of green food? Combined with the scientific detection of relevant parties, the analysis shows that it is not necessary to change the traditional production technology, but also to solve the 3-point bending experiment, 4-point bending experiment, sheet metal tensile experiment, thick plate tensile experiment, reinforced steel bar tensile experiment, chain tensile experiment, fixed part experiment Connecting rod experiment, modified fatigue experiment, bending and twisting compound fatigue experiment, interactive bending fatigue experiment, CT experiment, CCT experiment, gear fatigue experiment, and reduce the waste of raw materials and staff poisoning caused by on-site deployment. 6 The test results of the electronic tensile testing machine can be output in Excel format to improve the utilization rate of raw materials, reduce production costs and reduce business risks. The best way is to allow only maleic anhydride modified polypropylene and polyurethane adhesives to be used in food packaging according to gb-9685 standard, while single component pressure-sensitive adhesives with benzene as solvent are not allowed to be used
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