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If you want to know more, take a look at the PP forum, a lot of information about film, there are many friends who do PE, PET, CPP, BOPP, PVC, PA, PS film.
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Legal analysis: The implementation standards for plastic product inspection can be roughly divided into the following categories:
1. Product standards for plastic raw materials, such as GB T 5761-2006 "Suspension Method General PVC Resin", GB T 12670-2008 "Jushenliang Propylene (PP) Resin", GB T 12672-2009 "Acrylonitrile-Butadiene-Styrene (ABS) Resin" and so on.
2. Product standards for plastic general materials, such as GB T acrylonitrile-butadiene-styrene (ABS) pressure piping system Part 1: Pipes, GB T 10003-2008 "General purpose biaxially oriented polypropylene (BOPP) film", GB T 3830-2008 "Soft PVC calendered film and sheet" and so on.
3. Standards for the production and production of plastic daily devices, such as GB 24429-2009 "Sports Helmets Safety Requirements and Test Methods for Bicycles, Skateboards, and Roller Skating Sports Helmets", GB T 24984-2010 "Daily Plastic Bags", GB T 11793-2008 "Test Methods for Mechanical Properties and Weather Resistance of Unplasticized Polyvinyl Chloride (PVC-U) Plastic Doors and Windows".
Legal basis: Article 2 of the Standardization Law of the People's Republic of China The standards (including standard samples) mentioned in this law refer to the technical requirements that need to be unified in the fields of agriculture, industry, service industry and social undertakings.
Standards include national standards, industry standards, local standards, group standards, and enterprise standards. National standards are divided into mandatory standards and recommended standards, and industry standards and local standards are recommended standards.
Mandatory standards must be enforced. The State encourages the adoption of recommended standards.
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First, the text. The standard requirements for the appearance quality of the product are that slight intermittent wrinkles are allowed, but not more than 5% of the surface area of the product, scratches, scalds, perforations, peculiar smells, adhesions, foreign bodies, delamination, dirt, no false sealing, flatness, no obvious bubbles in the heat sealing part, no interfilm sliding when moving, slight tendons that do not affect the use are allowed, and the unevenness of the end face of the film roll is not more than 3 mm. The standard also limits the number of joints per roll of composite membrane.
2. Analysis. As a recommended national standard, some of the requirements of this standard can be agreed upon by both the supply and demand sides. Because there are many product varieties and molding methods of composite films and bags for packaging, rapid changes in product structure, and a wide range of applications, the standards for each variety can never meet the requirements of food packaging.
The requirements of this standard are determined based on the common items of composite films and bags for packaging, which is of guiding significance for the formulation of relevant standards and the formulation of product standards for enterprises. However, due to the different structural combinations, size specifications, and sterilization processes of each product, the standard inspection rules require that the food packaging composite film and bag must be tested for 6 indicators of appearance quality, specifications, pulling force, heat sealing strength, peeling force, and hygienic performance, and the rest are agreed upon by both suppliers and demanders; Non-food packaging composite films and bags must be tested for appearance quality, specifications, tensile force, heat sealing strength, peeling force 5 indicators, and the rest are agreed by both supply and demand.
3. What is the porosity of packaging stipulated by the state?
Relevant laws stipulate that the number of packaging layers and packaging voids of beverages, wine, pastries, health products, snack foods, tea and other foods must meet certain specifications. For example, in the case of alcohol, the ratio of unnecessary space in the sales packaging to the volume of the sales packaging shall not exceed 55%.
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1. The General Office issued a notice on restricting the production and sale of plastic shopping bags, which requires all supermarkets, shopping malls, bazaars and other commodity retail establishments to implement a paid use system for plastic shopping bags, and no plastic shopping bags shall be provided free of charge;
2. Passenger trains, passenger ships, passenger cars, airplanes, stations, airports and tourist attractions are also not allowed to provide ultra-thin plastic shopping bags to passengers and tourists;
3. Plastic shopping bags must be clearly marked with prices to encourage enterprises to provide cloth bags for free;
4. Plastic guesses or shopping bags must be clearly marked with a price, and separate payment will be made. The notice stipulates that commodity retail establishments shall not provide or include plastic shopping bags in the total price of goods for free. At the same time, the relevant departments will formulate specific management measures for the paid use of plastic shopping bags in commodity retail places, and gradually form a market environment for the paid use of plastic shopping bags.
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Answer]: When plastics are used as food containers and packaging materials, initiators and catalysts need to be used in polymerization and curing, some of which are more toxic and have styrene residues. There should be different requirements for different plastic products, but the general requirement should be harmless to the human body.
According to the relevant regulations of our country, Genyou Rubber has put forward the hygiene standards for resin and molded products for plastic blind leather products. The immersion dissolution test is adopted, that is, some simulated solutions are selected to soak the plastic products, and then the leachables in the immersion solution are determined. Therefore, item C is selected.
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The types of plastic bags are:
1. High-pressure self-polyethylene plastic.
Bag 2, low BAI pressure polyethylene plastic DU bag.
3. Polypropylene plastic bags.
4. Polyvinyl chloride plastic bags.
High-pressure polyethylene plastic bags can be used to package food or daily necessities, low-pressure polyethylene plastic bags can be used as garbage bags, DAO shopping bags or fresh-keeping bags, polypropylene plastic bags can be used to hold clothes, and polyvinyl chloride plastic bags can be used to make cosmetics packaging bags and bags.
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