Focus on water soluble film application 

Multifunctional development of PET film-TPU moisture-permeable waterproof film-film supplier

by:POLYVA     2021-11-14
The TPU moisture-permeable waterproof film is a non-porous film with a hydrophilic base. It has good processability, but it is still slightly inferior to polyester film. The product has been produced by many manufacturers in mainland China, and its profit and future are compared with that of the previous year. Has declined a lot. Recently, researchers at the University of Freiburg in Germany have developed a material that can shed its skin like a snake. The material consists of three layers: the top is a waterproof layer, the middle is a water-soluble polymer, and the bottom is a superhydrophobic silicon film. Most fabrics are easy to scratch and tear. When the top layer of this 'snakeskin' fabric is scratched, water will penetrate and dissolve the water-soluble layer, and automatically fall off the outer layer, which is waterproof and durable. The lotus leaf looks unremarkable, but scientists got inspiration from its surface structure and developed a waterproof cloth that can effectively self-clean. Jürgen Rühe, a researcher in Microsystem Engineering at the University of Freiburg in Germany, said that there have been many papers on superhydrophobic surfaces and lotus-like materials, but they all have the same shortcomings, that is, they have low mechanical strength and are fragile. Even if the strength is increased to a certain extent by increasing the size of the surface bumps (such as the micrometer scale), most of the lotus leaf-like materials are easily scratched or torn, and at the same time, their waterproof performance is impaired. To solve this problem, the Rühe team took inspiration from reptiles and developed a material that can shed the outer layer. The Rühe team improved the superhydrophobic material into a self-healing material with a three-layer structure. The top layer is a hydrophobic membrane composed of poly 1H, 1H, 2H, 2H-perfluorodecyl acrylate (PFA), also called 'nanograssThe nanostructure obtains hydrophobic properties. Under this layer is polyvinylpyrrolidone (PVP), a water-soluble polymer used in various medical applications. The bottom layer is a super-hydrophobic thin film silicon nanograss. This three-layer structure ensures the 'molding' performance of the material. When the surface layer is worn, the material is immersed in water and the interlayer dissolves water, which makes the damaged top layer loose and fall off, exposing the new hydrophobic layer below. This is just like 'snake slough' in appearance. Regardless of the multi-layer superposition, the interactive superposition of the two types of materials is a major technological innovation of new waterproof materials. It is difficult to achieve close adhesion of different materials without detracting from each other. The interlayer also improves the overall strength of the material, which is more than ten times higher than the strength of a single layer, and it is resistant to pulling and tearing and cutting. However, this material is still in the laboratory stage, and a key problem needs to be overcome, that is, the external waterproof layer is too easy to be damaged. It is a company specializing in the production of PET film with multiple functions, such as: transparent PET film, milky white PET film, release PET film, supply of PET motor film, etc. With a wide variety of products, affordable prices, and environmental protection, we provide customers with excellent quality and service based on the service tenet of excellence in production, honesty and trustworthiness in distribution, and warm and thoughtful service. Interested parties welcome to inquire! Contact: Wen Feng 13728425799
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