Transparent fire-resistant coating is also called fire-resistant varnish. It is a kind of decorative fire-resistant coating. It is a special coating combining decoration and fire resistance. Mainly used for fire protection of high-grade wooden decorative materials and the steel structure surface of buildings or structures.
At present, the commonly used fire retardant paints in China are all intumescent, mainly used on the surface of wooden decorative materials. When the surface of the object coated with fire retardant paint is exposed to fire, the fire retardant layer can quickly foam and expand in a short period of time, delaying the development of the burning situation.
The appearance of fire-resistant paint is very similar to ordinary paint, and it is difficult to distinguish from the appearance, and it is also difficult to check the quality of fire-resistant paint on site. In the experimental project, the fire supervision departments at all levels can distinguish by the following methods.
、根据国家标准，除满足阻火性要求外，防火漆的燃烧性能分为一级和二级。 1. According to national standards, in addition to meeting fire resistance requirements, the fire resistance of fire retardant paints is divided into first and second grade. Under the specified experimental conditions, the flame resistance time of the primary fire retardant paint is not less than 20 minutes, and the flame resistance time of the secondary fire retardant paint is not less than 10 minutes.
、查验该是产品是否具有国家级消防质检中心出具的合格检验报告，也可上网查询。 2. Check whether the product has a qualified inspection report issued by the national fire-fighting quality inspection center, or check online. At present, fire retardant paints adopt a form approval system for fire protection products, and fire retardant paints sold on the market should have a national fire protection product form approval certificate and a form inspection qualification report.
、防火涂料的现场施工应以生产厂家产品外包装说明为准，一般不需要兑水稀释，涂刷上进行，涂刷量不低于500g/m2 3. On-site construction of fire-resistant coatings shall be subject to the manufacturer ’s product packaging instructions. Generally, it is not necessary to dilute with water, and it should be applied on the brush.
、目前国内企业生产防火性能达到二级的防火漆，其成本价格在8000元/吨以上，如销售格低于此，质量堪忧。 4. At present, domestic enterprises produce fire retardant paints with fire protection performance reaching Grade II. The cost price is above 8,000 yuan / ton. If the sales standard is lower than this, the quality is worrying.
、实际使用中，为了保证防火漆的防火及其他使用性能，一般需要采用透明的罩面涂层。 5. In actual use, in order to ensure the fire resistance and other performance properties of fire retardant paint, a transparent overcoat is generally required. The amount of fire retardant paint is generally 350 ~ 500g / m2, and the amount of top coat is generally 50g / m2.
、可在现场对产品的质量做初步的检查:在已施工好的基材上切取两三块小样，或取少量样品涂在胶合板上，按实际施工的情况涂刷。 6. The quality of the product can be checked on the spot: take two or three small samples on the already constructed base material, or take a small amount of sample and apply it on the plywood, and paint according to the actual construction. Under normal circumstances, according to the specified amount (generally 500g / m2) construction, the foam layer thickness of the primary fire retardant paint is more than 20mm, the foam layer thickness of the secondary fire retardant paint is more than 10mm, the foam layer should be uniform and dense. When it is dry, check with the flame of an alcohol lamp.
When fireproof paint is burned by a strong fire, it will foam and expand in large quantities, and the surface will aggregate, and there will be no burnout in a few minutes. However, fake and shoddy fireproof paint will not foam, and a lot of slag will be scattered. Wood substrates will also quickly burn and break.