Polyethylene-based resin, through the selection of a suitable flame retardant, and the surface of the fine composite coupling treatment, while adding graft modified binder resin and flame retardant synergist and other additives, successfully developed A special core material for flame-retardant polyethylene Fireproof Aluminum Composite Panel with strong market value. The material has excellent flame retardant and smoke inhibition properties, as well as good mechanical properties and extrusion processing properties. The Fireproof Aluminum Composite Panel made of the flame-retardant PE core material has the measured combustion performance meeting or exceeding the national flame retardant material (B1 level) index, and some of the main indicators reach the level of non-combustible material (Grade A), which fully meets the national construction. Decorative materials fire safety performance requirements.
Fireproof Aluminum Composite Panel (hereinafter referred to as aluminum-plastic composite panel) is a new type of interior and exterior wall decoration material for building construction successfully introduced in China in the 1990s. It is made of polymer adhesive film (or hot melt adhesive) from coated aluminum plate and plastic core material. A new type of metal-plastic composite material which is formed by hot pressing. Due to its elegant appearance, light weight and convenient construction, it is favored by the construction industry. Especially since 1998, the annual sales volume has increased by more than 30%, showing the huge potential of the aluminum composite panel market. At present, there are about 60 aluminum-plastic panel production enterprises with a certain production scale in China, with an annual production capacity of more than 40 million square meters.
Polyethylene is widely used as a core material for Fireproof Aluminum Composite Panel because of its abundant raw materials, low cost, and ease of processing. With the continuous improvement of fire protection regulations in recent years and the improvement of fire hazard and safety awareness, the state has put forward requirements for the fire safety performance of Fireproof Aluminum Composite Panel for building decoration materials, especially when it is used as an airport, a station, a stadium, There are certain restrictions on the decoration of public high-end entertainment venues and high-rise buildings. The main reason is ordinary polyethylene plastic, the oxygen index is only 17,4, which is extremely easy to burn and cause fire under the conditions of high pressure, heat release and discharge. In addition, polyethylene produces molten droplets when burned, which easily ignites other items. , leading to the spread of fire. The aluminum composite panel produced by using the core material composite is a combustible material. In order to make the aluminum-plastic composite board a flame retardant or non-combustible building decoration material, it is necessary to efficiently flame-retard the plastic core material to obtain a fireproof aluminum composite panel with high fire safety.
The research of flame retardant polyethylene materials has been a difficult and hot spot for research and development at home and abroad. Commonly used additive flame retardant methods can be roughly divided into two types: halogen-containing flame retardant and halogen-free flame retardant. Halogen-containing flame retardant refers to the addition of a halogen-containing polymer or a halogen flame retardant to PE, and is combined with a toxic antimony compound to form a halogen-fluorene flame retardant system. The flame retardant effect is remarkable, but in the event of a fire, due to thermal decomposition and Combustion, easy to produce a large amount of toxic carbon monoxide and strong corrosive hydrogen halide smoke, forming secondary pollution. Therefore, the low-smoke and halogen-free flame retardant technology of polyethylene has become the focus of research in various countries. Halogen-free flame retardant PE is a non-halogen flame retardant added to PE such as: hydrated metal oxide aluminum hydroxide, zinc borate, magnesium hydroxide, basic magnesium carbonate, basic magnesium sulfate and intumescent flame retardant such as pentaerythritol, Flame retardant composites such as ammonium polyphosphate, melamine compounds, and other halogen-free flame retardant synergists. Additional processing aids, including heat stabilizers, dispersing lubricants, rheological agents, antioxidants, UV absorbers, crosslinkers or colorants, etc., must also be added as necessary. Compared with halogen-containing flame-retardant PE materials, halogen-free flame-retardant PE materials have the advantages of relatively low price, little toxicity or toxicity, and no smoke and melting. However, due to the relatively large amount of halogen-free flame retardant added, the processing performance and mechanical properties of the system will be degraded.
We use low-smoke halogen-free composite flame retardant technology and high polymer graft cross-linking modification technology to better solve the technical key and difficult points between flame retardant and smoke suppression, processing formability and physical and mechanical properties. The research and development direction of flame retardant materials. The aluminum-plastic panel produced by the successfully developed halogen-free flame-retardant polyethylene sheet can meet the fire safety requirements of the fire department, and can meet the physical and mechanical properties of the aluminum-plastic panel and the requirements of continuous large-scale production process. It was included in the 2001 national key new product trial production plan.