Composition of fireproof materials
Inorganic binder: mainly water glass, gypsum, phosphate, cement, etc;
Refractory mineral filler: alumina, asbestos powder, calcium carbonate, perlite, too white powder, etc;
Flame retardant organic resins: mainly include polyvinyl chloride, perchloroethylene, chlorinated rubber, neoprene lotion, epoxy resin, phenolic resin, etc.
Fire retardant additives: mainly include organic compounds containing phosphorus, halogen and nitrogen (chlorinated paraffin, tributyl phosphate and decabromodiphenyl ether), and inorganic compounds such as boron series (boric acid, zinc borate and aluminum borate), antimony series, aluminum series and zirconium series.
Fire protection standards for fire-resistant materials
1、 Classification of combustion performance of building materials and building decoration materials The combustion performance of building materials refers to all physical and chemical changes that occur when they burn or encounter fire. This performance is measured by the ignitability and flame propagation of the material surface, heating, smoking, carbonization, weight loss, and the generation of toxic products. China's national standard gb8624-97 divides the combustion performance of building materials into the following grades.
Class A: incombustible building materials: materials that hardly burn.
Class B1: fire retardant building materials: fire retardant materials have better flame retardancy. It is difficult to catch fire when encountering open fire in the air or under the action of high temperature, and it is not easy to spread quickly, and the combustion will stop immediately after the fire source is removed.
Class B2: Combustible building materials: combustible materials have certain flame retardant effect. In case of open fire in the air or under the action of high temperature, the fire will start immediately, which is easy to cause the spread of fire, such as wooden columns, wooden house frames, wooden beams, wooden stairs, etc.
Class B3: flammable building materials: without any flame retardant effect, they are extremely easy to burn and have great fire risk.
2、 Correct use of materials with different combustion performance levels
The building materials used in the building should meet the requirements of the national mandatory code, which is gb50222-95 code for fire protection design of interior decoration of buildings, It is required in the specification that "the interior decoration design of the building shall properly handle the contradiction between the decoration effect and the use safety, actively adopt non combustible materials and non combustible materials, try to avoid the use of materials that produce a large amount of smoke or toxic gases during combustion, and achieve safety, applicability, advanced technology and economic rationality". Therefore, when choosing building materials or interior decoration materials, consumers should give priority to non combustible grade A and non combustible grade B1 products while ensuring the decoration quality, so as to protect their own safety.
3、 How to select building materials and interior decoration materials that meet the requirements
First of all, when choosing, first determine your own needs, observe and compare more, and choose a good brand and model.
Then, check the packaging and use instructions of the materials to see if there is a clear indication of the combustion performance grade of the products, because Article 27 of the product quality law of the people's Republic of China stipulates that "warning signs or warning instructions in Chinese should be provided for products that may endanger personal and property safety if they are used improperly". The fire safety performance of building materials is an important performance index related to personal and property safety, The combustion performance grade shall be clearly indicated on the product package to prevent fire accidents caused by improper use of the product. The National Center for quality supervision and inspection of fireproof building materials only issues combustion performance grade marks to products that have passed the type inspection. At the same time, it also tracks the quality of individual enterprises and issues quality tracking marks. It also cooperates fully with the national building materials testing center to comprehensively promote fire protection and environmental protection marks. With an explicit logo, it indicates that the manufacturer has made a clear commitment to the product, which can be used as a direct basis for consumers to make technical judgments and complaints.
Finally, check the quality inspection report of the selected products. Generally, there should be two reports, namely, the physical and chemical performance inspection report and the combustion performance inspection report, which are issued by different quality inspection institutions and preferably by the national inspection center.
After these three steps of careful selection, consumers can buy products that are reassuring, safe and guaranteed in quality.