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231 results about "Cellophane" patented technology

Cellophane is a thin, transparent sheet made of regenerated cellulose. Its low permeability to air, oils, greases, bacteria, and water makes it useful for food packaging. Cellophane is highly permeable to water vapour, but may be coated with nitrocellulose lacquer to prevent this.

Superhydrophobic coating preparation method, coating prepared therethrough, and application of coating in production of highly-transparent superhydrophobic coating layer

The invention discloses a superhydrophobic coating preparation method, a coating prepared therethrough, and an application of the coating in the production of a highly-transparent superhydrophobic coating layer. The superhydrophobic coating preparation method comprises the following steps: adding a certain volume of a solvent, a cosolvent and a catalyst into a container one time, stirring the added substances at a certain rotating speed for a period of time, adding a certain volume of silicate ester and fluorine-containing siloxane, and continuously reacting all above substances at room temperature for a certain period of time to obtain the coating. The superhydrophobic coating prepared in the invention can be sprayed, dip-spread or dip-coated on glass, sheet paper, steel or other different substrates, and the transmittance of the produced coating layer in a visible light range reaches 92% or more. Compared with coating layers in the prior art, the produced coating layer has the advantages of simple production method, low cost, and facilitation of large-scale industrial production, has multiple uses in window glass, skyscraper light curtains, mobile phone screens and computer screens, and has great commercial values.
Owner:SOUTHEAST UNIV

Preparation method of glass paper/polylactic acid/nanocellulose composite membrane

The invention discloses a preparation method of a glass paper/polylactic acid/nanocellulose composite membrane. The preparation method comprises the following steps: firstly, taking traditional glass paper as a base material; modifying the surface of the glass paper through an immersion manner, so as to improve the interface compatibility between the glass paper and a composite layer; secondly, compounding polylactic acid on the surface of the modified glass paper, so as to improve the waterproof performance and enhance the mechanical properties of the traditional glass paper to a certain extent; thirdly, uniformly dispersing cellulose nanofibers into a dichloromethane solution by adopting a method of compounding polyethylene glycol and mixing with a polylactic acid solution; forming the composite layer by the glass paper modified by immersion; finally, obtaining a high-intensity and waterproof glass paper/polylactic acid/nanocellulose composite membrane material. According to the preparation method disclosed by the invention, the problem that the polylactic acid in a lamination layer is easy to fall off is solved through carrying out interface modification and uniformly adding the cellulose nanofibers; the waterproof performance and the mechanical strength of the traditional glass paper are greatly improved and a process is simple so that industrialization is easier to realize.
Owner:NANJING FORESTRY UNIV
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