Abstract: The present invention relates to a press-heating gas grafting hydrophobization apparatus, and a hot water-resistant paper and an oil-absorbing paper manufactured using the press-heating gas grafting hydrophobization apparatus. In the press-heating gas grafting hydrophobization apparatus according to the present invention, since a non-air-permeable dryer belt is provided surrounding and pressing a drying roller to prevent dissipation from a base material of a fatty acid chloride vaporized by the drying roller, the press-heating gas grafting hydrophobization apparatus has an advantage of improving efficiency of a gas grafting reaction. Therefore, by using the press-heating gas grafting hydrophobization apparatus according to the present invention, the reaction amount of fatty acid chloride per unit area can be remarkably improved.
Abstract: Using the sympathetic printed-matter according to the present invention, a hidden content can be visualized just by wetting. Therefore, it is possible to remove necessities of the sympathetic ink and a special material such as reagent or equipment for visualizing hidden contents. In addition, since the hidden contents disappear by removing water from the sympathetic printed-matter, the sympathetic printed-matter can be used repeatedly. Using the reading confirmation portion, whether or not the sympathetic printed-matter has been read by any other person can be easily determined. In the sympathetic printing method according to the present invention, a hydrophobic substrate can be formed using an existing gas grafting facility, and an ester hydrolase composition and the reading confirmation portion can be formed using an existing printing method. Therefore, a large amount of sympathetic printed-matters can be produced inexpensively and efficiently.
Type:
Grant
Filed:
July 29, 2016
Date of Patent:
January 16, 2018
Assignees:
KANGWON NATIONAL UNIVERSITY-INDUSTRY COOPERATION FOUNDATION, DAEHAN PAPER CO., LTD., TAEKYUNG POLYMER CO., LTD., CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS, CARTONS ET CELLULOSES
Inventors:
Myoung Ku Lee, Jeong Yong Ryu, Chang Geun Kim, Kwang Seob Lee, Jae Hoon Lee, Han Je Cho, Hyeok Jun Kwon, David Guerin, Philippe Martinez