Special napping interface agent of plastic extrusion plate

Abstract

The invention provides special interface mortar for a plastic extrusion plate. The interface mortar has favorable bonding strength with a substrate, especially the plastic extrusion plate; in a construction site, the interface mortar can be formed by adding water and stirring. The interface mortar comprises the following components by weight: 20-50% of cement, 30-70% of sand, 2-15% of dispersible emulsion powder, 1-20% of inorganic composite material and 0.5-5% of organic composite material.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an interface mortar for improving the bonding strength of an extruded plastic plate in an external wall thermal insulation system. Background technique [0002] With the development of building energy conservation throughout the country, external wall insulation systems have been widely promoted and applied as a major energy-saving means. Extruded board is a kind of thermal insulation material with excellent performance. Due to its good thermal insulation performance, high compressive and tensile strength, and low water absorption, it is widely used in external thermal insulation and internal systems of external walls. However, due to the heating and melting extrusion method used in the production process, its skin is smooth, not easy to bond firmly, and it is easy to fall off during the heat preservation project, causing safety hazards. Existing methods for improving the bondi...

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Problems solved by technology

Among these treatment methods, the extruded board treated with the surface of the extruded board with electric heating wire forms a secondary crust on the surface, which cannot improve the bonding strength between the mortar and the extruded board; the surface embossing treatment cannot damage the extruded board. Due to the dense skin structure of the board, the actual bonding effect is not ideal; the method of mechanical grinding to remove the skin can improve the bonding strength between the extruded board and the mortar to a certain extent, but due to the large amount of dust generated during the grinding process and cannot be re- The polystyrene powder used causes environmental pollution, which is inconsistent with the national environmental policy, and also reduces the utilization rate of extruded boards; the method of applying liquid interface agent is the most widely used method to increase extruded boards The method of bonding strength with mortar, but in this method, the operable time of the mortar must be between the surface dry and the hard dry of the interface agent. Under the construction conditions on site, its operable time is short, which is lower than the operable time. Liquid The interface agent does not form a certain structure and cannot provide high bonding strength. However, the surface of the interface agent forms a smooth skin structure after the operating time, just like the surface of the extruded board, it is also not easy to bond firmly. In addition, It is not easy to judge whether the liquid interface agent is painted on the extruded board. These reasons may cause safety hazards in the external wall insulation system using extruded board.

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