Ordinary packaging containers for cosmetics and washing products are mostly made of high-density polyethylene. In order to meet the packaging requirements of different products, the materials used in plastic bottles are increasingly rich. ?
Because transparent plastic bottle containers can make consumers see the contents clearly, consumers have higher and higher requirements for transparent PP plastic bottle containers, and transparent polypropylene is the main material to meet this requirement.
The development of pp transparent packaging bottle is a hot spot in plastic bottle packaging at home and abroad in recent years. High transparent polypropylene container (PP plastic) is very popular because of its good transparency and gloss and strong ornamental value.
PET is polyethylene terephthalate, and PETG is polyethylene terephthalate-1, 4- cyclohexanedimethanol. Compared with PET, it contains 1, 4- cyclohexanedimethanol * * * monomer, so its performance is unique.
In the field of practical daily necessities, PET is mainly used to package various beverage containers, such as pure water bottles like Nongfu Spring and beverage bottles like Coke.
PETG is used for various durable daily necessities, such as cosmetic bottles, perfume bottles, drug packaging containers and so on. Compared with PET, PETG has higher transparency, better chemical resistance, better oil resistance and better weather resistance (yellowing resistance).
The procurement cost of PETG is 2-3 times that of PET. PETG is a better choice to buy cosmetic bottles.
PET bottle:
PETG bottle:
PP bottle:
Extended data
Methods to identify the safety of plastic containers;
When using plastic containers, be sure to read the numbers marked in the triangle at the bottom of the bottle. Only by understanding the material properties can it be used in a suitable environment. A triangle consisting of three arrows is usually printed on the bottom of a plastic bottle, with numbers ranging from 1~7.
For example, the number'1'is marked with' PET'. PET is a chemical substance called' polyethylene terephthalate', which is commonly used in mineral water bottles and carbonated beverage bottles. When PET is easily deformed at 70℃, substances harmful to human body will be dissolved out. At the same time, it is not allowed to be exposed in the car, and it is not allowed to load alcohol, engine oil and other substances. "
A recent article entitled "Do you know the toxicity of plastic bottles from the numbers at the bottom? The post "Ignorance kills people" has been circulated in many forums.
This post explains the meaning of the numbers at the bottom of plastic bottles in detail, and describes many taboos hidden in the use of 1 ~ 7 plastic bottles with pictures and texts.
It is also said that a 12-year-old girl in the United Arab Emirates got cancer because she used the same plastic mineral water bottle for 16 months. This 1 PET plastic bottle may release a carcinogen called DEHP after being reused for 10 months.
DEHP is a general plasticizer in industry, which is mainly used for processing paints, dyes and packaging materials. Yuan Huilin, a professor at the Department of Materials Engineering in beijing university of chemical technology, told reporters that plastic products such as mineral water bottles that we use every day, as long as they are produced by regular manufacturers, will not contain this substance after testing, so there is no so-called "release".
"Consumers should try to avoid reusing aging and perishable plastic appliances. It is best not to reuse the beverage bottle many times, otherwise it will easily breed bacteria and cause health hazards. "
Yuan Huilin reminded consumers that when using plastic containers, they must see the numbers marked on the triangle at the bottom of the bottle clearly. Only when they know the characteristics of materials can they use them in a suitable environment. In particular, we should be wary of plastic waste recycling products in the market.
According to the relevant regulations of our country, outsourced recycled materials and contaminated raw materials cannot be used to make plastic packaging containers, tools and other products for food. Bottles and containers made of recycled plastic waste are usually rough in workmanship and have no trademarks and environmental recycling labels.
These products are very thin, almost deformed by hand, and accompanied by pungent smell; It will do harm to the human body. Take the gas decomposed by plasticizer as an example. When it enters the human body, it will cause symptoms such as shortness of breath and increased heart rate. If absorbed in large quantities, it may also cause central nervous system disorder and gastrointestinal discomfort.
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