Non-toxic .
However, if it is a low-priced extruded board produced from recycled materials, whether it is toxic or not is uncontrollable. . .
If it is a flame retardant extruded board, it can be environmentally friendly and non-toxic. . . .
In short, the genuine extruded board is non-toxic. . . Fakes and low-priced imitations must be known to everyone. . .
Is extruded board toxic to human body?
Inferior and toxic
The root of "poison": recycling plastic accessories
The author learned from Liu Chong, the founder of Luyu brand, the inventor of many patents and the general manager of Shanghai Luyu Energy-saving Technology Co., Ltd. that at present, there is no national standard for floor heating auxiliary materials in China, and many materials do not do well in environmental protection. However, due to the lack of professional knowledge, many owners have chosen the "three noes" floor heating auxiliary materials that may be harmful to human health, but they still don't know it. He said that 90% of domestic floor heating auxiliary materials are recycled materials, and the recycling of plastics is beneficial to the environment. However, due to regulatory loopholes in domestic plastic recycling, medical wastes, foreign wastes and harmful plastics may all enter the plastic recycling process. At present, the level of domestic plastic recycling enterprises is low, and most of them are still in the state of small workshops. It is difficult to distinguish which plastics are toxic and which are not recyclable. Therefore, many auxiliary materials for floor heating, such as extruded board, are filled with metal and PVC. And these accessories made of recycled materials are becoming "invisible killers" who "sneak attack" the owner's health.
PVC: It can cause chronic poisoning.
It is understood that PVC, also known as polyvinyl chloride, is not toxic in itself, but as long as the temperature is close to 50 degrees in the process of floor heating, it will produce toxic gases such as hydrogen chloride and chlorine gas, as well as carcinogens such as hydrochloric acid and dioxin. The release of these substances will have a strong effect on human eyes and respiratory mucosa, which can cause headache and nausea.
Is XPS thermal insulation extruded board toxic for indoor use?
Seen from the portal website wqbw88 of China external wall thermal insulation industry. I hope it helps you.
Comparison between EXP Board and XPS Board in External Thermal Insulation System of External Wall
Comparison of EPS board and XPS board in external thermal insulation system of external wall
1 and XPS board product status;
Extruded board, also known as XPS board, uses exactly the same raw materials as EPS board (polystyrene board), but the difference is the forming process and mechanism of the board. At present, there are many varieties and manufacturers of XPS boards used in the domestic market.
There are two companies producing XPS boards in the world, namely Dow Chemical Company and Owens Company in the United States. The XPS board produced by Dow Company is called Shu Tai Ban Long, which was sold in China as early as 95. 1997, Owens Company started to build a factory in Nanjing. 1998 The price of Shu Tai Dragon Board was 1.800 yuan /m3, and Owens Board was 1.300- 1.500 yuan /m3. With the improvement of building energy efficiency requirements in China and the economic development in China, the domestic demand for XPS boards has increased, so since 2002, more and more manufacturers have invested in building factories. At present, the enterprises producing XPS boards are mainly concentrated in Shanghai, Qingdao, Beijing and other cities. With the development of technology, there are many manufacturers of XPS board equipment in China. At present, Harbin and Daqing have established factories and are ready to put into production. XPS boards are getting cheaper and cheaper. At present, the products have been sold to 380 yuan /m3-500 yuan /m3.
2. Comparison of external wall insulation between adhesive EPS board and adhesive extruded board;
Generally, the thermal conductivity of bonded EPS board for external wall insulation is less than or equal to 0.042W/(m.k), and its price is between 220-300 yuan /m3. The thermal conductivity of KL-BB- 1 Kelon EPS board produced by Jilin Kelon Decoration Engineering Co., Ltd. is 0.029 1W/(m.k), and the price is 260 yuan /m2. The thermal conductivity of extruded board for external wall insulation is 0.029 W/(m.k), and its price is about 850 yuan /m3.
Take Changchun as an example, if it meets the requirements of 50% heat preservation and energy saving:
According to the national standard, the extruded board needs to be 5cm thick and 42.5 yuan/m2; The KL-BB- 1 Kelon EPS board produced by Jilin Kelon Decoration Engineering Co., Ltd. needs to be 5.2cm thick and 6.0cm thick, as long as 15.60 yuan /m2. This can also achieve the effect of heat preservation and energy saving. KL-BB- 1 Kelon EPS board produced by Jilin Kelon Decoration Engineering Co., Ltd.
The bonding material, covering material and facing material of the two insulation boards are completely the same. In this way, compared with the two, the economic benefit of sticking EPS board for external wall insulation is very considerable.
Taking 3cm extruded board as an example, the price per square meter is 25.5 yuan; According to national standards, polystyrene board is 4.5cm(3×0.042/0.028=4.5cm) and 5.0cm thick, and the price per square meter is 13 yuan; If the polystyrene board produced by Jilin Kelon Decoration Engineering Co., Ltd. is used, the insulation effect can also be achieved. The price of 4cm (3× 0.0291/0.029 = 3.01cm) is per square meter 10.4 yuan, and the insulation board alone can save 25.5 yuan per square meter-10 yuan.
If you spend 25.50 yuan /m2 to buy a polystyrene board of about 10cm, which is equivalent to the thermal insulation effect of a red brick wall with a thickness of 2. 10m, the thermal insulation and energy saving effect will be more obvious.
3. Description of polystyrene board thickness:
The thermal conductivity of polystyrene board is less than 0.042, which is stipulated by national standards. If the thermal conductivity of polystyrene board is greater than 0.042, it is not allowed to be used, and it is difficult to play the role of heat preservation, but it is not stipulated that the thermal conductivity of all polystyrene boards is determined to be 0.042. But according to the product inspection reports produced by different manufacturers. According to the national standard, when the thermal conductivity of polystyrene board is 0.042, in Changchun area, when the shape coefficient is less than or equal to 0.3, the thickness of polystyrene board should be 7.0cm when it is combined with a 240 mm thick red brick wall. When the body shape coefficient >; 0.3, the thickness of polystyrene board is 9.0cm, as shown in the attached table.
According to the provincial standard, when the thermal conductivity of polystyrene board is 0.042, it is 240mm thick in Changchun area. ......
Is extruded board poisonous?
The raw material of extruded board is polystyrene, which is often used to make various disposable containers that need to withstand the temperature of boiling water, such as disposable foam lunch boxes. So extruded board is non-toxic!
Is it poisonous to sleep on the extruded board?
Extruded board is mainly used for heat preservation when floor heating is laid. Try to use a better extruded board, but few people sleep on it! If the synthetic raw materials are recycled materials, it is somewhat toxic. Specifically, Baidu can look at Haote residential technology. They are very professional heating companies and have many contacts in this respect!
Is it harmful to touch extruded board?
The main raw material of extruded board is polystyrene (PS), which was used to make foamed snack boxes in the past. Even some plastic cups are made of polystyrene, which is relatively stable in plastic, so the extruded board is non-toxic and does not burn!
Is it harmful to keep warm with extruded board in the house?
Both extruded board and benzene board can be used, but both have their own advantages and disadvantages. Qualified products will not cause harm to human body in normal use.
If it is used for home interior walls, it is recommended not to make board system;
First, both of them have poor fire protection performance, and toxic gases will be released when burning. Second, the requirements for auxiliary mortar are high (especially for extruded board, the mortar with poor bonding cannot be bonded, and the mortar with poor plastering will be powdered. Cracking, etc. Third, the finished product is difficult to maintain, easy to crack and low in strength. Fourthly, there are few qualified products in the board and mortar market (unless they are bought in factories).
Is the external wall insulation board toxic? Does it contain formaldehyde?
First of all, it contains no formaldehyde. Exterior wall insulation boards mainly include polystyrene boards and extruded boards. Benzene board is polystyrene foam board, and the downstream products produced with benzene as the main raw material are non-toxic. However, many benzene boards of small manufacturers are waste plastics or have additives, which cannot guarantee non-toxicity.
Most importantly, a large number of toxic gases will be released after the benzene board is burned. This is very important and must be understood.