Health and safety requirements for the hottest liq

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Health and safety requirements for liquid food packaging in Shenzhen

at present, the state has relevant standard requirements for paper plastic composite packaging materials, and the health requirements are regulated by referring to the requirements of the original real gold plate of food packaging, A-level fireproof insulation board, which is not only cost-effective, but also the requirements of paper and polyethylene for food

to ensure that liquid packaging materials meet the requirements of packaging hygiene and reach the international advanced level, the raw materials for processing packaging materials first need to meet the corresponding hygienic standards. There are mainly four kinds of raw materials for paper plastic composites used in dairy packaging, and the main functions of each raw material are as follows: 1. Cardboard mainly provides the strength and stiffness of packaging. 2. Polyethylene mainly blocks liquid contents and microorganisms. 3. Aluminum foil is mainly used to block oxygen, light and smell. 4. Ink is mainly used for printing and reproducing the patterns required by customers. Food hygiene and safety have very strict requirements on raw materials to ensure the taste, nutrition and freshness of food. Here are the three main raw materials of paper plastic composite packaging materials, cardboard, ink and polyethylene

1. Base paper for packaging. As the main raw material of packaging materials, paper has strict hygiene and safety requirements for the base paper used for food packaging, although it does not directly contact with liquid food. The requirements for base paper are mainly based on the management measures for domestic food packaging base paper issued in 1990, which requires that the use of base paper should comply with gb11680 hygienic standard for food packaging base paper, such as the requirements for fluorescent agents, dyes, heavy metals, etc. Now, European and American countries require to pass the certification of relevant provisions of FDA, which not only makes corresponding requirements for the finished base paper (for example, microorganisms, pollutants and odors), but also has corresponding requirements and certification for the raw materials, processing equipment and environment of base paper processing, so as to ensure that the processing process of base paper meets the requirements of food packaging. In particular, there are corresponding special requirements for milk packaging paper, such as the strength and moisture of the paperboard to prevent the secondary invasion of bacteria or microorganisms

2. Printing ink. Because the heavy metals and solvents in the ink will migrate inward and outward at the same time, there will be a big safety hazard if they enter the package contents. Now most countries advocate the use of environmental friendly inks, alcohol soluble inks and water-based inks, especially water-based inks, which are increasingly promoted as green environmental friendly inks. However, in some traditional printing, many manufacturers still use solvent based inks because they still need to provide independent high-pressure oil, especially toluene or xylene as solvent for printing. These have not been clearly stipulated in our country so far, and many production and processing manufacturers have not been properly managed and supervised. However, in developed countries in Europe and the United States, it has been expressly prohibited to use benzene solvents in food packaging. If toluene or xylene penetrates into the skin and enters the human body, it will endanger human hematopoietic function and nervous system. The requirements for ink, especially for solvent based ink, are mainly from the following aspects

the first is the content of heavy metals. There are no relevant domestic standards for the content of heavy metals in inks. At present, the standards for detecting the content of heavy metals mainly include the content of arsenic and lead specified in the hygienic standard gb11680-89 for base paper for food packaging. The EU safety standards en71-3:1993, en:1997 and astmfa of the United States have strict standards and regulations on the content of heavy metals in inks. Because cadmium, lead, chromium and arsenic will pose serious harm to the human body. Long-term exposure and continuous accumulation in the human body will lead to the decline of human immune function and the mental retardation of infants and young children. The second is the residue of organic volatile matter (VOC), which mainly refers to the residue of organic solvents in solvent based inks in packaging materials. At present, the standard for the detection of VOC content can refer to China's industrial standard intaglio composite plastic film ink (qb/t), which stipulates that the sum of the residues of toluene, xylene, ethyl acetate, acetone and other eight solvents is not more than 30mg/m2

the inks used for dairy packaging and printing are mainly solvent based inks and water-based inks. In particular, the use of water-based ink should be the main development direction of liquid packaging because its solvent is water, which has no impact on the environment and human health. However, due to its high cost and high requirements for printability, most enterprises still use solvent based printing inks

3. Polyethylene for packaging. For polyethylene used in packaging, there is the "Hygienic standard for polyethylene resin for food packaging when the test piece is vertically inserted between the cylinder and the pressure roller shaft (the coating faces the zigzag column)" (GB), and there are corresponding requirements for other organics, heavy metals, dyes and other impurities in polyethylene

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