Views: 8 Author: Site Editor Publish Time: 2021-03-06 Origin: Site
From the perspective of fire safety, the rigid foam of the polyurethane high-pressure foaming machine is a thermosetting foam plastic. The foam itself is divided into three levels: B1 (flame-resistant), B2 (flammable), and B3 (flammable). It can also be combined with some inorganic Insulation materials are compounded together to make Class A composite non-combustible materials.
1. my country's current standards require that materials used in building exterior wall insulation must have a combustion performance not lower than B2. The rigid foam of the polyurethane high-pressure foaming machine can fully meet the requirements.
2. B2 grade polyurethane rigid foam will be carbonized in a fire environment and will not produce combustion drips. The flue gas emitted during combustion is mainly carbon monoxide, carbon dioxide, nitrogen oxides and a very small amount of hydrogen cyanide.
3. These substances are the same as the products when we burn natural substances such as wood, leather and wool, and there is no special danger.
4. The 14 fire tests of polyurethane rigid foam exterior moisturizing wall model fire conducted by the Fire Protection Institute of the Chinese Academy of Building Research all show that the B2 polyurethane rigid foam thin plastering system does not have flame propagation, and the system remains in the combustion process. Stable, no flashover and collapse or fall off.
On May 14, Zhu Ruixian, Secretary of the Party Working Committee and Director of the Management Committee of Jining Economic Development Zone, Xu Gang, member of the Economic Development Zone Party Working Committee and Deputy Director of the Management Committee, and other leaders visited Shandong
Recently, Jining Bureau of Industry and Information Technology announced the list of municipal-level "Specialization, refinement, specialization, novelty" small and medium-sized enterprises in 2022. Shandong Hightop Group passed the expert review and was selected as a "Specialization, refinement, sp
All family members:According to the national statutory holiday regulations and the actual situation of the company, the following arrangements are now made for the May 1st Labor Day holiday: 1. April 30th ( Saturday ) - May 4th ( Wednesday ) , a total of 5 days off ;April 23 morning (Saturday), Apri
In 2021, despite the more complicated international situation, with the spillover of China's manufacturing capabilities and comprehensive national strength, the scale of my country's cross-border e-commerce will reach 1.98 trillion yuan, out of a high growth rate of 15%, and usher in a historical di
The electric sprayer has the advantages of simple structure, convenient operation, few failures, easy maintenance, low price, stable pressure, long operation time, wide application range and so on. There are many herbicide formulations, and different formulations have different formulation methods.
1. Unique impermeability:Rigid foam is a dense microcellular foam with a closed cell rate of more than 92% and a smooth self-skin. It is an excellent anti-seepage material.The rigid foam layer has no joints and is completely impermeable to water, which fundamentally eliminates the possibility of roo
Problems that should be paid attention to before and after use of polyurea spraying equipment:First of all, after spraying every day, or when changing the variety of spraying materials, the residual materials of spraying equipment and conveying pipelines should be removed, preferably once a day. The
As the name implies, with the rapid development of China's building energy saving market, polyurethane spraying equipment has been widely used in the field of building insulation and waterproofing, and the demand is increasing.
With the pace of green and civilized city construction, more and more attention is paid to the treatment and disinfection of domestic waste.1. The methods of garbage disposal, especially the methods of sorting and reusing garbage, have also appeared one after another, and gradually entered the ranks
Polyurea spray material is a new type of polymer material. Since this material has many different forms, and different forms of polyurea sprayers have many different characteristics, polyurea spray materials are widely used in contemporary society and industrial production.As the thermal insulation
content is empty!