Strict chemical requirements
New items of chemical properties
Inorganic filler content requirements
Requirements for polymer content of antiskid rubber particles
Limit of harmful substances in finished surface products (18 items)
Limit of harmful substances in non solid raw materials (12 items)
Limit of harmful substances in solid raw materials (7 items)
Inorganic filler content
In item 5.5 of the new national standard, inorganic fillers
And polymer content
In addition to artificial grass surface, the
The content of inorganic filler should be less than 65%
At the same time, the content of polymer in the surface should be higher than 20%
In short, the rules here refer to
When you take a certified test sample and burn it
The final residual ash weight should be less than 65% of the total mass
(because only organic matter can burn)
But at the same time, it is stipulated that the polymer content of surface layer should be higher than 20%
So we should meet these two requirements at the same time
Only those with higher glue content can be selected
Granular products can meet the requirements
Harmful substances in surface course
In the new national standard, the surface products
There are many new regulations on the limit of harmful substances
First, first
Six phthalate esters
By the past all six kinds of synthesis together
Change to (DBP, BBP, DEHP)
（DNOP、DINP、DIDP）
Three for a separate type of requirements
It can be said that it is more strict
About Moca, here is the focus
MOCA as an additive
It can react with isocyanate
Forming strong chemical bonds
In PU elastomer system
MOCA structure is constructed by introducing Cl atoms
The distribution density of electron cloud is changed
The toxicity was significantly reduced
MOCA itself is weak toxicity
After reducing the toxicity, the safety is more significant
And for now
MOCA is functional
There are no other additives that can
Completely replace or achieve its effect
Therefore, the new national standard is relative to the Shanghai standard and Shenzhen standard
In MOCA
The requirements have been relaxed
Less than one gram per kilogram is allowed
TVOC is total volatile organic compounds
In fact, in the whole new national standard
A big difficulty lies in this requirement
The new national standard requires TVOC release less than
5 mg per square meter per hour
And it's not easy to achieve that
Our company is the drafting unit of the new national standard
Have cooperated with local testing institutions for testing
In the use of traditional plastic runway
When testing
TVOC is hard to satisfy
If you want to pass TVOC test stably
The solvent-free scheme must be adopted
Or water-based system scheme
Carbon disulfide is new
Carbon disulfide in new national standard
Less than 7 mg per hour per square meter
This project is mainly aimed at granular materials
Carbon disulfide is mainly contained in black particles
If the use of too cheap particles
This item is relatively difficult to pass
Similar to what I said earlier
Static use of coal tar pitch as foundation
It is to avoid carbon disulfide pollution to the runway
Restrictions on solid materials
New requirements for solid raw materials are added in the new national standard
It can be found that
There are two values in the total of 18 PAHs
One of them with the superscript b is
Requirements of artificial grass surface
Less than 50 mg / kg
It is the requirement for other moving flooring
At the same time, the smell of artificial grass is also required here
Restrictions on non solid materials
Here are two main items
One is short chain chlorinated paraffin
In fact, chlorinated paraffin is the same as MOCA
So far, it has not been functional
Other substances can be perfectly replaced
And a lot of them are labeled in multimedia
Chlorinated paraffin is a carcinogen
What is actually harmful to human body is
Short chain chlorinated paraffin
Its carbon chain length is between 10 and 13
It's a chemical that's chlorinated by different chemicals
A mixture of components
Chlorinated paraffin with longer carbon chain length
It is harmless to human body
The requirements for SCCPs in the new national standard are as follows:
Less than 1.5g/kg
The other is free formaldehyde
The word formaldehyde may be used in interior decoration
I'll hear more
Formaldehyde is harmful to human body
Therefore, formaldehyde is strictly limited in the new national standard
It is required to contain less than 0.5g/kg
——To be continued——
In this issue, we share the chemical requirements
So, combined with the physical properties described before
Detection of physical and chemical properties in new national standard
What has changed
What kind of requirements do you have
New national standard testing requirements
Coming soon, please look forward to it