Use of plastic film or plastic composite film as architecture component protective film or decorative film

Abstract

The invention relates to the application of plastic film or plastic composite film, used as building element protective film or decorating film, wherein the invention coats adhesive or polymer on the surface of building element, then adheres the plastic film or plastic composite film on the said surface. The invention has the advantages that: it can prolong the service life of decorate element, with low cost and simple operation, while the polymer is made by mixing adhesive and other stuff on site.

Description

technical field [0001] The invention relates to the application of plastic films or plastic composite films. Background technique [0002] Concrete structures have only been around in the world for about 150 years. Since concrete is an alkaline material, the carbon dioxide in the atmosphere corrodes the concrete and causes the carbonization of the concrete, and the infiltration of chloride ions in the surrounding environment into the concrete will cause the corrosion of the steel bars, as well as the freeze-thaw damage of the concrete itself and the use of active mineral components in the concrete. Sand and gravel aggregates, alkali aggregates react with water and expand to destroy concrete. The book "Guidelines for Durability Design and Construction of Concrete Structures" published by China Architecture and Building Press in 2004 and compiled by the Engineering Structure Safety and Durability Research Consulting Project Team of the Department of Civil Engineering, Water C...

AI Technical Summary

Problems solved by technology

Various plastic films have different properties. For example, polyester film (PET) has high mechanical strength, good durability, excellent heat resistance and cold resistance, and has good performance in blocking air and water vapor penetration, but it cannot be used alone. Satisfy the barrier properties required as a building air barrier or concrete protective layer, and the flexibility of increasing the thickness is not good; polyvinyl alcohol film (PVA) is a barrier O 2 , CO 2 , N 2 The performance is the best, but the water vapor resistance is poor, and it is a plastic film that is easy to hydrolyze. Its strength is better than polyethylene film (PE), but it is much lower than polyester film (PET); high-density polyethylene film (PE) is low in price, Soft, low strength, but its performance of blocking air and water vapor is very poor, because it is easy to heat and laminate to make packaging bags, the price is low, and the thickness of the composite film is increased, so it is composited with other plastic films as the inner lining of the packaging bag The most widely used film; polyvinylidene chloride film (PVDC) has a large molecular density and a regular structure. It is currently mainly used for the packaging of ham sausages. It is second only to polyvinyl alcohol film (PVA) in terms of air barrier. A film with the best barrier properties, but the water vapor barrier performance is not as good as that of aluminized film, and far lower than that of a composite film sandwiched with aluminum foil.

In the composite film, a high barrier composite film is often formed by using aluminum plating, inorganic oxide plating, aluminum foil, coating film, two or more layers of plastic film bonding, compounding, and co-extrusion. The air permeability and moisture permeability of the composite film The moisture resistance and barrier properties are significantly higher than those of a single material film, which combines the advantages of multiple materials. However, there is no plastic film or plastic composite film bonded to building components as a protective layer and decorative film for buildings. precedent