Recently, the "new national standard" drafted by the Ministry of education has come out. The new standard of sports flooring industry will certainly innovate the market demand of flooring industry. In order to protect the vital interests of new and old customers who have been paying attention to and supporting Dingxing, next, Jierui sports will share and interpret the new national standard with you.
The State Administration of market supervision and administration, the national standard information public service platform, officially released the full text of the national compulsory new national standard for school sports ground - "primary and secondary school synthetic material surface sports ground" gb36246-2018.
With its professionalism, scientificity and comprehensiveness, the new national standard will promote the technical level and product quality level of China's sports flooring industry to a new level, and protect the healthy sports of primary and secondary school students in China. At the same time, it also sends a positive signal of regulating the industry and opening the industry self-discipline.
Interpretation of the new national standard
1. Updating of terms and definitions
Synthetic material surface, cast-in-place surface, prefabricated surface, permeable surface, non permeable surface, artificial grass for sports, impact absorption, vertical deformation, tensile strength, elongation at break, anti sliding value, aging resistance, flame retardancy, thickness, volatile organic compounds, total volatile organic compounds, non solid raw materials Terms and definitions of solid raw materials.
The terms and definitions of synthetic surface course, compression recovery rate and grade 1 flame retardant are deleted.
2. Classification and definition of sports ground with synthetic material surface
Classification definition of use function and material form:
4.1 according to the use function, the synthetic material surface sports ground is divided into track and field field field, ball field and other activity fields.
3.New pavement requirements
Assessment of environment and site basic raw materials:
5.1.1 for the pavement of synthetic material surface, the ventilation and diffusion conditions of the site and its surroundings should be comprehensively evaluated, which should be conducive to the emission of volatile organic compounds, and avoid the pollution of waste gas, waste water and solid waste to the site and surrounding environment.
5.1.2 before paving, the list of raw materials to be used (including product name and quantity), chemical safety technical manual and type inspection report prepared according to GB / T 16483 shall be provided. The raw materials used and the sports ground after paving shall not cause harm to human health and ecological environment under normal and expected use conditions.
5.1.3 coal tar asphalt shall not be used as the foundation material of the site.
3.New pavement requirements
The requirements of appearance, specification, marking line and flatness are deleted. The average thickness is used to control the final product.
5.Update of physical and mechanical performance index The items and index requirements of impact absorption, vertical deformation and anti sliding value in physical and mechanical properties are added; The performance requirements of hardness (a), compression recovery rate and rebound value are deleted; The tensile strength items and index requirements, elongation at break and index requirements were modified. The impact absorption value of the plastic track is more than 35%, which can effectively absorb shock and cushion, and protect children's ankles and knees in sports. EPDM particles paving buffer layer can effectively improve the impact absorption performance and avoid injury in motion. It can effectively improve the shock absorption performance and avoid injury in sports. 6.Update of test method for performance index The test methods of thickness, tensile strength, elongation at break and flame retardancy were modified; The test methods of impact absorption, vertical deformation and anti sliding value are added; The physical and mechanical performance requirements and test methods of artificial grass surface were added; The aging resistance performance requirements and test methods of synthetic sports ground surface are added; 5.4.1 the tensile strength and elongation at break of cast-in-place and precast surface after accelerated aging for 500 h shall meet the requirements of Table 2. 5.4.2 after accelerated aging for 500 h, the breaking force of artificial grass surface shall not be less than 80% of the measured value before accelerated aging. 5.5.1 the content of inorganic filler in synthetic material surface layer other than artificial grass surface layer shall not exceed 65%. The requirements and test methods for the total amount of polymer in the synthetic material particles filled with anti-skid rubber particles and artificial grass were added; 5.5.2 the total amount of polymer in the synthetic material particles for anti-skid rubber particles of synthetic material surface layer and artificial grass surface layer filling shall not be less than 20%. The requirements for the limit of harmful substances and odor in the finished products and raw materials of the synthetic material surface sports ground and the test methods are added. 7.New sampling requirements The sampling requirements of cast-in-place, prefabricated and artificial grass surface materials are added; Two index detection requirements for cast-in-place, prefabricated and artificial grass surface are added: limit detection of harmful substances and physical performance detection; 8.Inspection rule added Sampling inspection The sampling inspection standards mainly meet the following requirements: 1; 2. Physical and mechanical performance requirements; 3. Limit requirements of inorganic fillers and polymers in the surface layer of synthetic sports ground; 4. Limit of harmful substances and odor requirements in finished products and raw materials of synthetic materials. type inspection The type test standards mainly meet the following requirements: 1. Physical and mechanical performance requirements; 2. Aging resistance requirements of synthetic material sports ground surface; 3. Limit requirements of inorganic fillers and polymers in the surface layer of synthetic sports ground; 4. Limit of harmful substances and odor requirements in finished products of synthetic material surface. In addition, it should be noted that the type inspection should be the finished product of synthetic material surface, and any of the following situations occurs: a) during the type identification of new products; b) When the production is stopped for six months; c) Major changes in raw materials and production process may affect product performance; d) During normal production, once a year; e) The quality department in charge of supervision and random inspection. The new national standard adds the following contents: 01 site foundation requirements 03 physical properties (6 items) 05 inorganic filler content requirements 07 limit of harmful substances in finished surface products (18 items) 09 limit of harmful substances in solid raw materials (7 items) 11 sampling requirements 13 determination rules And: increase requirements for raw material construction method, technical requirements, quality standards and testing methods for laying surface course of synthetic material sports ground, increase design, construction, environmental protection and acceptance The download password is n3z8 Get the original