Thermo-setting transfer mould release agent and method for preparing and using same

Abstract

The invention provides a thermo-setting transfer mould release agent. The thermo-setting transfer mould release agent comprises polyisocyanates and an ingredient, wherein the ingredient comprises the following components in part by weight: 15 to 45 parts of fluorocarbon resin, 2 to10 parts of polytetrafluoroethylene micro powder, 40 to 62 parts of C4-C8 alkane, 0.2 to 0.5 part of antifoaming agent, 1 to 3 parts of flatting agent, 1 to 5 parts of release auxiliaries, and 1 to 4 parts of flatting silica, wherein the weight ratio of the polyisocyanates to the fluorocarbon resin is 1 to 8. and the method for preparing and using the mould release agent is as follows: adding the fluorocarbon resin while agitating the C4-C8 alkane and the polytetrafluoroethylene; adding the antifoaming agent, the flatting agent, the release auxiliaries and the flatting silica, and then agitating the mixture; and, regulating the weight ratio of the fluorocarbon resin to the polyisocyanates in the product to be 8 to 1. The acquired mould release agent is coated on a PET (Polymer) film by a mesh plate and then dried for the use. The mould release agent is not transferred after being transfer-printed, so that the performances of the printing oil are not affected; the bottom film has no change after transfer-printing, and the friction resistant and solvent resistant performances are very good.

Description

technical field [0001] The invention relates to a transfer printing release agent, in particular to a thermosetting transfer printing release agent and a preparation and use method thereof. Background technique [0002] At present, the thermal transfer release agents on the market are mainly resin type and wax type. The basic principle of thermal transfer release agent in use is: the thermal transfer film is separated from the carrier film under heat and pressure, and then firmly transferred to the substrate. [0003] Wax release agent is the most widely used release agent. But part of the wax in the wax release agent will migrate with the pattern, and the melted wax will penetrate into the ink, thus affecting the color. Therefore, the adhesion on the PET surface is not good, and it is also not resistant to solvents. During the transfer process, too high or too low temperature will affect the transferred pattern. Many resin-type release agents have poor layability, and t...

AI Technical Summary

Problems solved by technology

Many resin-type release agents have poor layability, and the release layer is hard and brittle after film formation, which is only suitable for transfer on hard surfaces

And the resin-type release agent is not resistant to solvents, and the adhesion on the PET surface is not good.

In the silk screen printing process, due to the influence of scraper and solvent, if there is too much overprinting, the transfer effect will be seriously affected