Patent TW-255861-B (TW)
Title: Production process of 3-D markings on aluminum plate by thermal transfer printing
Inventor: CHEN YEU-SHAW
IPC: B41M3/12
Filed: 1994-12-16
Granted: 1995-09-01
Abstract: A production process of 3-D markings on aluminum plate by thermal transfer printing, which comprises preparing the original material, degreasing, etching, water washing twice, surface adjustment, chromate membrane treatment, water washing twice, anode rigid membrane treatment, water washing twice, washing by purified water, baking, roller coating on bottom layer, baking, roller coating on medium layer, baking, roller coating on top layer, baking, dying primer by sublimation, baking, dying gold oil by sublimation, baking, transfer printing by dying, protective membrane treatment, etc.; in which: the original material comprises finished aluminum plate or zinc plate; the degreasing process comprises immersing the original material in a solution which has been added with solvents such as chemicals of TO152 and TO153 etc. to effectively remove grease on the surfaces of the original material; the etching process comprises immersing the degreased original material in a corrosive solvent to remove surface impurities of the original material; the process of water washing twice comprises washing the etched original material with clean water, oven drying, followed by washing with clean water to remove the residual acid solvent; the surface adjustment process comprises immersing the etched and washed original material in a solvent containing T1212 chemical, followed by washing with clean water to grind and smoothen the original material so that when the original material receives chromate membrane treatment, the material can obtain more uniform and dense membrane to reduce consumption of the membrane agent; the chromate membrane treatment comprises immersing the original material in a solvent containing chemicals such as TO125 and TO126, etc. to increase adhesivity and corrosion-resistant of the coating layer; the process of water washing twice comprises washing the original material processed by the chromate membrane treatment with low hardness tap water or soft water to remove the residual solvent left after the chromate membrane treatment; the anode rigid membrane treatment comprises immersing the chromate membrane treated material in a sulfuric acid solvent to enhance the rigidity of the chromate membrane; the process of water washing twice comprises using clean water to wash the processed material to remove residual sulfuric acid left after the anode rigid membrane treatment; the process of washing by purified water comprises washing the processed material with purified water to ensure there is no residual acid or alkaline solvent left on the material surface; the baking process comprises baking the washed material to remove the moisture left on the material surface; the process of roller coating on bottom layer comprises roller coating polyvinylidene difluoride fluorocarbon coating on the material surface, and baking the coated material; the baking process comprises baking and drying the coated material; the process of roller coating on medium layer comprises roller coating polyvinylidene difluoride fluorocarbon coating on the material surface, and baking the coated material; the baking process comprises baking and drying the coated material; the process of roller coating on top layer comprises roller coating polyvinylidene difluoride fluorocarbon coating on the material surface, and baking the coated material; the baking process comprises baking and drying the coated material; the process of dying primer by sublimation comprises roller coating baking primer for the purpose of sublimation transfer printing and TH300 chemicals on the surface of processed material so that the ink on the sublimation transfer printing paper sublimes and permeates; the baking process comprises baking the material coated with the sublimation transfer printing to dry the coated material; the process of dying gold oil by sublimation comprises roller coating the gold oil on the processed material with gold oil for the purpose of sublimation transfer printing and TH300 chemicals so that the sublimation transfer printing paper sublimes and permeates; the baking process comprises baking the material coated with the sublimation transfer printing to dry the coated material; the process of transfer printing by dying comprises covering the sublimation transfer paper on the processed material, pressing and heating on the side without coating to transfer printing the ink on the sublimation transfer printing paper and permeating the ink into the sublimed gold oil body, sublimed dyed coating, the top roller coating layer, the medium roller coating layer, the bottom roller coating layer and the chromate membrane layer, to generate 3-D marking.