Back to results
US 12,291,617 B2Granted
Manufacturing method for a composite sheet
AssigneesHyundai Motor Company, Kia Corporation, University-Industry Cooperation Group of Kyung Hee University
InventorsSung Wan Jeon, Jung Mok You, Kang Yun Lee
Life of this patent
Estimating the term…
Abstract
A manufacturing method for a composite sheet having excellent rigidity, no shape deformation, and excellent transparency is disclosed. By laminating a film obtained by impregnating a composite resin on a wet cake including cellulose nanofibers and glycerol, rigidity and transparency may be maximized, and a flat and thick composite sheet may be provided.
Claims13
A manufacturing method for a composite sheet, the method comprising:
- obtaining a dispersion by mixing a cellulose nanofiber and glycerol;
- obtaining a wet cake by drying the dispersion;
- treating the wet cake with a solvent to obtain a treated wet cake;
- obtaining a film by impregnating the treated wet cake with a composite resin comprising a thermosetting resin and a curing agent;
- and
- obtaining the composite sheet by laminating, pressing, and curing the film,
- wherein the wet cake is obtained by drying the dispersion for 40 hours to 60 hours in a chamber having a humidity in a range of 80% to 100%, and
- wherein the wet cake is treated by substituting the glycerol with the solvent, and the glycerol is removed.
5 more elements
Dependencies are inferred from the claim text.