Self-cleaning membrane structure and preparation method thereof

Abstract

The invention discloses a self-cleaning membrane structure and a preparation method thereof, and belongs to the field of building membrane materials. The self-cleaning membrane structure comprises a high-strength polyester fabric core layer, a strengthening layer, a polyvinyl chloride (PVC) function layer and a self-cleaning layer, wherein the PVC function layer comprises a creep-resistant layer and an anti-aging layer; and the strengthening layer is prepared from the following raw materials in parts by weight: 100 parts of polyvinyl chloride paste resin, 5 to 15 parts of polystyrene resin, 140 to 160 parts of dioctyl-phthalate (DOP), 2 to 8 parts of liquid rare-earth stabilizer, 2 to 6 parts of liquid isocyanate cross-linking agent, 6 to 15 parts of flame retardant, 1 to 5 parts of octylphenol polyoxyethylene ether, and 5 to 15 parts of OS-20 diluent. The self-cleaning membrane structure has the effects of better creep resistance, a better mechanical property and longer service life.The preparation method of the self-cleaning membrane structure comprises the steps of preparing raw materials; preparing the membrane layers: sequentially forming the strengthening layer, the creep-resistant layer and the anti-aging layer, and then plastifying; embossing; carrying out surface treatment to form the self-cleaning layer; embossing; and cooling to obtain the product. The product hasthe effects of better tear resistance and tension resistance, and higher membrane material peeling strength.

Description

technical field [0001] The invention relates to the field of architectural membrane materials, in particular to a self-cleaning membrane structure and a preparation method thereof. Background technique [0002] PVC membrane material is a membrane structure composite material made of high-strength polyester fabric as the base fabric, PVC mixture as the coating agent and surface treatment. It has the advantages of high strength, light weight and durability. At present, PVC membrane materials have been widely used in China, and the application fields involve geotextiles, light box advertisements, soft carriages, canopy materials, inflatable models, children's toys, swimming pool and yacht materials, fast doors, marine facilities, architectural membrane materials , wind turbine blades, etc. However, there are also the following problems, which hinder its development, "such as (1) the tearing of the film surface under wind and snow loads, in the southeast coast of my country and...

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Problems solved by technology

However, the above-mentioned existing technical solutions have the following defects: the membrane material has been subjected to wind and snow loads for a long time, and its interior gradually adapts and balances with the external stress through the creep, deformation, and adjustment of the chain segment and the mesh chain; It can be restored after the external force is removed, but some parts cannot be restored after the external force is removed, and permanent deformation occurs, which in turn leads to tearing force between the internal segments of the membrane material, crack defects, and causes changes in the size of the membrane material. Membrane mechanics Performance decline, restricting the service life of membrane materials

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