Are pc plastic bags safe? Zhihu (pc plastic packaging bags)

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List of contents for this article:

• 1、Top ten most toxic plastic bags
• 2、Common plastics in life tell you which ones are toxic?
• 3、Which plastic products are safe
• 4、What kind of plastic bags are poisonous

Top ten most toxic plastic bags

1. There is currently no officially certified list of the "Top Ten Most Toxic Plastic Bags". The following are the categories of plastic bags with high toxicity identified in health institutions and industry research.

2. Secondly, burning plastic bags will produce a variety of toxic and harmful gases, which will seriously pollute the atmosphere. Particularly noteworthy is that dioxin is one of the pollutants, which is one of the most toxic chemicals currently known. Dioxins are highly carcinogenic and teratogenic, and have serious impacts on the life safety and fertility of animals, plants and humans in the affected area.

3. Plastic bags will decompose into a kind called "dioxin" at high temperatures. Abstract: dioxin, also known as dioxin. It belongs to chlorinated tricyclic aromatic hydrocarbons and is a mixture of more than 200 isomers, homologues, etc. Its toxicity is expressed in terms of the half-lethal dose (LD50). It is about 100 times more toxic than potassium cyanide and about 900 times more toxic than arsenic. It is the most toxic, very stable and difficult to decompose first-class carcinogen.

4. Environmental experts pointed out that incineration of garbage containing plastics and rubber can easily produce what is called "the most toxic poison on earth-dioxins." If this phenomenon is not stopped and allowed to develop, it will cause great harm to the health of residents in surrounding communities, and the consequences will be unimaginable.

5. The salesperson also told reporters that they had cheaper lunch boxes and asked the reporter if they wanted them. When the reporter followed her into the warehouse, he found that the so-called cheaper lunch boxes turned out to be plastic foam disposable lunch boxes that had long been eliminated. The production and sales of this kind of lunch box were strictly prohibited by the state as early as 2001. It is understood that unqualified disposable lunch boxes mainly contain a large amount of industrial calcium carbonate, paraffin and other toxic substances, and some also use waste plastics.

Common plastics in life tell you which ones are toxic?

1. Common uses: disposable foaming lunch boxes, fast food boxes, foam plastic products. Potential risk: Toxic substances (such as styrene monomer) are separated out when temperatures exceed 65 ° C. Recommendation: Avoid using disposable foaming lunch boxes to hold hot food and reduce exposure to high temperatures. PC (polycarbonate resin, identification number 7) Common uses: milk bottles, sports kettles, some tableware.

2.03 Polyvinyl chloride plastic This plastic is generally used in our lives and will not be used to make food bags, such as raincoats, plastic films, etc. worn on rainy days. It is this kind of plastic product, as long as it does not go through high temperatures., the toxicity of this plastic product is very slight.

3. Rules for the safe use of plastic products Mineral water bottles: Although oil can be filled, long-term storage and placement in overheated places should be avoided. At the same time, repeated use is not recommended, and it is best to use and discard it immediately. It is best not to pack alcohol in plastic bottles to prevent alcohol from dissolving harmful substances in plastic. Plastic containers: Check for burnt smell and black spots when purchasing, which may be signs of using recycled waste.

4. Some plastic bags contain plasticizers, which may release harmful substances: Plastic bags on the market are divided into various types according to different manufacturing materials and uses. Common ones are polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC). Among them, PVC plastic bags contain more plasticizers, such as phthalates. These chemicals can increase the flexibility of plastics, but they can easily release harmful substances under certain conditions.

Which plastic products are safe

PET (polyethylene terephthalate): Commonly used to make mineral water bottles and carbonated beverage bottles. This material is resistant to about 70°C and is suitable for warm or frozen drinks, but not suitable for high-temperature liquids or heating. Research has found that PET bottles after about 10 months of use may release carcinogens and pose a health risk.

Safe plastic products include: PP plastic, PE plastic, PTFE plastic, PC plastic, etc. The safety of plastic products mainly depends on their composition and manufacturing process. The following are several common safety plastic products and their characteristics: PP plastic PP plastic is a plastic material widely used in food packaging and container production. It has excellent heat resistance and chemical stability, and can maintain stable performance at high temperatures without releasing harmful substances.

Magic Cleaning Sponge: For every 1 gram of melamine sponge worn, more than 6.5 million micro-plastic fiber particles will be released, which will spread with the water flow during the cleaning process. Synthetic fiber fabrics: Synthetic fabrics such as fleece jackets, yoga pants, and sports quick-drying clothes will shed off ultra-fine fiber silk when machine washed, and enter the environment with sewage and eventually enter the human body.

Among common plastics with different numbered numbers, generally No. 5 PP (polypropylene) is relatively safe. No. 1 PET (polyethylene terephthalate) is commonly used in mineral water bottles, etc. After a period of use, harmful substances may precipitate out and is not suitable for long-term repeated use. No. 2 HDPE (high density polyethylene) is often used in the packaging of cleaning products and bathing products. It is safe, but it is usually not used for direct contact with food.

What kind of plastic bags are poisonous

1. Polyvinyl chloride (PVC) plastic bags: Phthalate plasticizers may precipitate out when temperatures exceed 60 ° C, and extremely toxic dioxins may also be produced when heated or incinerated. Polyethylene (PE) plastic bags: The nature is relatively stable, but low-molecular toxic compounds will be released when the temperature exceeds 80 ° C. Food-grade plastic bags: Even if they meet safety standards, the release of plasticizers will increase sharply by 3-5 times when the temperature exceeds 50 ° C; when exposed to hot food above 70 ° C, the migration rate of harmful substances will increase by 20 times.

2. There are significant differences in the temperature thresholds for releasing toxic components from plastic bags of different materials. Toxic substances will be separated out from non-food-grade polyvinyl chloride (PVC) plastic bags above about 80℃. Food-grade polyethylene (PE) and polypropylene (PP) Plastic bags need to exceed 100℃-150℃ before obvious decomposition occurs. The higher the temperature, the more plasticizers, hydrogen chloride and even dioxin-like toxic substances will be released.

3. Whether plastic bags for ordinary packaging are safe and toxic needs to be differentiated according to the material: Polyethylene (PE) plastic bags: These plastic bags are generally safe and non-toxic, have stable chemical properties, and will not release harmful substances during normal use. They are often used for packaging fruits and vegetables in supermarkets and packaging daily food. Most of the food plastic wrap on the market is also made of PE material.

4. Toxic plastic bags generally contain plasticizers such as phthalates and bisphenol A, toxic gases released by incineration of inferior plastic bags or at high temperatures, and harmful colorants and other toxins contained in black, red and blue plastic bags. Plasticizers such as phthalates and bisphenol A: These chemicals have estrogen-like effects and may interfere with the human endocrine system.

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