In order to further strengthen the construction and health and safety management of synthetic material surface sports ground in primary and secondary schools, the compulsory national standard "synthetic material surface sports ground for primary and secondary schools" was recently released and implemented. Compared with the old national standards, the new national standards are professional, scientific and comprehensive, especially highlighting the connotation of environmental health risk protection for children.

As schools pay more and more attention to the health and safety of students, the construction of new sports ground represented by plastic track has set off an upsurge in schools all over the country in recent years. According to incomplete estimates, there are no less than 500 plastic sports venues under construction and put into use in primary and secondary schools in a certain northern city, and more than 300000 students are engaged in daily sports in plastic venues.

There are health risks in plastic sports ground. What can not be ignored is that if the construction of plastic sports ground is improper, there is a certain health risk. The construction standard of school plastic sports ground is not complete, and there are weak links in the selection of raw materials and construction management in the construction process, which increases the environmental health risk. The situation of health and safety is grim, facing challenges from design, material selection, construction, supervision, acceptance and maintenance.

The irritant gas of some plastic track can't be removed for a long time. There are many harmful factors in the plastic sports ground of a few schools. At present, the raw materials of TDI Polyurethane plastic track in some schools in China contain some toxic and harmful substances, and harmful gases will be released under the temperature above 20 ℃ or ultraviolet radiation.

If it is laid by someone without professional knowledge, or some toxic and harmful additives are added in the process of laying, this kind of plastic runway may become a source of long-term harmful gas emission in campus. The production and manufacturing process of plastic industry involves the use of various organic raw materials, which is also one of the key industries of volatile organic compounds (VOCs) environmental emissions.

Public information shows that in recent years, the development of plastic runway in China is very rapid, and there are at least 500 companies producing plastic runway materials. Due to the fierce competition and regulatory loopholes, the use of fake and shoddy materials in varying degrees has also made some plastic runways become one of the sources of affecting the campus environmental safety.

It is more likely to inhale toxic gases when exercising. The influence of plastic playground pollution on students' health has attracted much attention. In recent years, the media reported that the campus plastic runway health risk events gradually increased, students' parents are worried about this.

Several years ago, hundreds of students in a primary school suffered from physical discomfort. The public suspected that there was a certain connection between the school's plastic track and the physical discomfort. In addition, the breathing capacity of students during exercise is 20-30 times that of quiet time. If you exercise on the substandard runway level, you will inhale harmful gases, which may cause irritation or discomfort such as dizziness, nausea, vomiting, etc. Generally speaking, there is a lack of professional health risk assessment for plastic track and sports ground in China. If necessary, professional assessment can be organized to understand the environmental safety status and main environmental hazards of typical plastic sports venues in primary schools.

There are more than one kind of plastic runway materials, which toxic and harmful substances need to be focused on? According to the literature at home and abroad, if the quality of plastic runway is not up to standard, the toxic and harmful substances that may diffuse into the air are more complex. The possible pollutants that need to be concerned are volatile organic compounds, semi volatile organic compounds and heavy metal pollutants.

Compared with the old standard, the new standard has more strict requirements on the limit index of harmful chemical substances in addition to the physical properties. Not only the content of harmful substances such as phthalates, polycyclic aromatic hydrocarbons and lead in the materials is more stringent, but also the emission of triphenyl, formaldehyde and other irritating gases in the runway is also required.

The implementation of the new national standard will promote the construction level and product quality of campus green sports venues to a new level, and protect the healthy sports of primary and secondary school students.