Medical blue laser printing film and preparation method

Abstract

The invention relates to a medical blue laser printing film and a preparation method. The medical blue laser printing film comprises a transparent PET base material, wherein a laser printing coating is arranged on the front surface of the transparent PET base material, and a blue antistatic layer is arranged on the back surface of the PET base material; the preparation method comprises the following steps: step 1, preparing the coating material of the laser printing coating; step 2, coating to form the laser printing coating: performing slope flow extrusion coating, heating with steam, drying, and enabling the drying temperature to reach 100 DEG C or above and the dry basis thickness of the coating to reach 10 micrometers; step 3, preparing the coating material of the blue antistatic layer; step 4, coating to form the blue antistatic layer: performing slope flow extrusion coating, heating with steam, drying, and enabling the drying temperature to reach 100 DEG C or above and the dry basis thickness of the coating to reach 2-2.5 micrometers. The medical blue laser printing film prepared by adopting the preparation method is suitable for high resolution laser printing, anti-adhering, low in friction coefficient, static resistant, high in adhesion capability, good in glossiness, blue and transparent in appearance, acid-base resistant, high in wear resistance, environment-friendly, simple and convenient in manufacturing method, and suitable for batch production.

Description

technical field [0001] The present invention relates to the technical field of medical products, in particular, to a kind of high-resolution laser printing, anti-adhesion, low friction coefficient, antistatic, high adhesion fastness, high gloss, blue Medical blue laser printing film with transparent appearance and preparation method thereof. Background technique [0002] The traditional medical imaging film uses silver halide photosensitive material as the medium. After exposure, development, fixing, drying and other steps, a medical imaging film for diagnosis can be obtained. This wet processing process is complicated, time-consuming and labor-intensive. Its use is subject to more and more restrictions; with the development of technology, digitally printed laser printing film is a new type of image film that has developed rapidly in recent years, and can be printed by laser printers; after collection and processing of digital medical images, It can be directly printed on f...

AI Technical Summary

Problems solved by technology

However, the laser printing adaptability of the existing PET-based medical film is still poor and needs to be improved; the factors that affect the printing adaptability are mainly the toner loading capacity and the paper passing rate

[0003] Among them, the carrying capacity of toner, in the field of medical diagnosis, in order to be able to more accurately identify and diagnose diseases, the requirements for the clarity of printed images are getting higher and higher; accordingly, the toner output of laser printers has also increased greatly to achieve laser printing. High resolution of printed graphics; however, the toner loading capacity of existing printing media on the market is limited. Because the toner carrying capacity is not enough, there are adverse phenomena such as powder falling and color fading, which are far from meeting the output quality requirements of high-resolution laser printers; therefore, in order to achieve color printing, the requirements for the toner carrying capacity of the coating will also be greatly increased; at the same time , during the printing process, the fixing temperature is as high as 200°C, and a large pressure is generated when the fixing is melted. This requires that our laser printing film printing ink-absorbing layer must have high temperature resistance, and the printing ink-absorbing layer and the substrate must have Strong adhesion, so as to ensure that the ink-absorbing layer of our medical laser printing film is not melted and does not separate from the substrate under high temperature and high pressure conditions

[0004] Secondly, in order to pursue higher work efficiency, the output speed of laser printing continues to increase, which puts forward new requirements for the passing rate of printing media; When printing on the screen, there is often adhesion between the films; when a stack of films is printed continuously, several films are "bonded" together, and enter the printing system with the transmission of the printer, causing blockage; this will seriously affect the normal use , and damage the printer components, and damage the service life of the printer; however, the existing PET film on the market has not had a practical and effective solution to this problem of inter-sheet adhesion, which has always troubled the majority of users

[0005] The problem of film adhesion is caused by many reasons: 1. During the use of transparent PET film, after friction, the surface is easy to accumulate charges, resulting in electrostatic adsorption; 2. People have also noticed that when the smooth surface of the film is in close contact and almost completely Isolate the air, and generate partial negative pressure or vacuum when separating; 3. Especially, when the film is coated with a smooth coating on both sides, after a stack of films is piled up, due to pressure and temperature changes, it will cause adhesion on the contact surface; the higher the temperature, the more the coating The softer, the greater the pressure, the more contact between the two surfaces after winding, and the more serious the adhesion problem

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