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A kind of polycarbonate laser etching film for smart card and preparation method thereof
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A polycarbonate and laser etching technology, used in information-carrying cards, printing, etc., can solve problems such as thinning of film whiteness
Active Publication Date: 2021-02-09
江苏华信高新材料有限公司
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The invention patent with the authorized announcement number CN 102196920B discloses a layered structure written by laser engraving, a security document, a blocking method and its application. The invention uses carbon black as a laser sensitizer to realize the anti-counterfeiting function of security documents through laser engraving, but The laser engraving of the layered structure must be carried out without a coating on the surface
The invention patent with application number 200910213088.4 discloses a preparation method of laser marking polycarbonate film and sheet. The invention uses powdered polycarbonate, laser powder, and heat stabilizer to realize the laser marking function of polycarbonate film, but The invention uses calcined powder composed of tinoxide and antimonyoxide as a laser marking additive, which will lead to a decrease in the whiteness of the film
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[0029] A preparation method for a polycarbonate laser etching film for a smart card, comprising the steps of:
[0030] 1) Mix the components evenly according to the ratio, and dry at 110°C for 6 hours to ensure that the water content is less than 100PPM;
[0031] 2) Put the dried raw material into the extruder, cool and shape it through a melt filter, a melt pump, a mold, and a three-roll calender to obtain a polycarbonate laser-etched film.
[0032] The process temperatures in step 2) are respectively 190-280°C for the extruder, 265°C for the filter, 270°C for the melt pump, 270°C for the mold, 120°C for the upper roll of the three-roll calender, and 125°C for the middle roll of the three-roll calender. ℃, three-roll calender lower roll 130 ℃.
Embodiment 2
[0034] A polycarbonate laser etching film for a smart card, the formula of which is:
[0035]
[0036] A preparation method for a polycarbonate laser etching film for a smart card, comprising the steps of:
[0037] 1) Mix the components evenly according to the ratio, and dry at 115°C for 4 hours to ensure that the water content is less than 100PPM;
[0038] 2) Put the dried raw material into the extruder, cool and shape it through a melt filter, a melt pump, a mold, and a three-roll calender to obtain a polycarbonate laser-etched film.
[0039] The process temperatures in step 2) are respectively 190-280°C for the extruder, 275°C for the filter, 280°C for the melt pump, 285°C for the mold, 135°C for the upper roll of the three-roll calender, and 130°C for the middle roll of the three-roll calender. ℃, three-roll calender lower roll 130-135 ℃.
Embodiment 3
[0041] A polycarbonate laser etching film for a smart card, the formula of which is:
[0042]
[0043] A preparation method for a polycarbonate laser etching film for a smart card, comprising the steps of:
[0044] 1) Mix the components evenly according to the ratio, and air-dry at 112°C for 5 hours to ensure that the water content is less than 100PPM;
[0045] 2) Put the dried raw material into the extruder, cool and shape it through a melt filter, a melt pump, a mold, and a three-roll calender to obtain a polycarbonate laser-etched film.
[0046] The process temperatures in step 2) are respectively 190-280°C for the extruder, 270°C for the filter, 275°C for the melt pump, 275°C for the mold, 130°C for the upper roll of the three-roll calender, and 128°C for the middle roll of the three-roll calender ℃, three-roll calender lower roll 132 ℃.
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Abstract
The invention discloses a polycarbonatelaseretching film for an intelligent card and a preparation method thereof. The film uses an extrusion process and is prepared by the following formula of 100parts of panlite, 1 to 1.5 parts of chain expansion agents, 1 to 3 parts of modified carbon nanometer tubes, 1 to 2 parts of light stabilizers and 1 to 2 parts of antioxidants. The raw materials are uniformly mixed according to the proportion ratio; after being dried, the materials are added into an extrusionmachine; after melt is cooled and shaped through a filter, a melt pump, a mold and a three-roller calender to prepare the polycarbonatelaseretching film. By using the polycarbonate as the main raw material, through the addition of the modified carbon nanometer tubes, the laser anti-counterfeiting function of the polycarbonate film is realized; the chain expansion agents are used for modifying the polycarbonate, so that the polycarbonate also has the holographic anti-counterfeiting function. The polycarbonate laser etching film for the intelligent card provided by the invention has the advantages that the whiteness is good; the image resolution is high; the color reduction performance is good; the etching bubbling is avoided, and the like.
Description
technical field [0001] The invention belongs to functional thin films, in particular to a polycarbonate laser etching film for smart cards and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of science and technology, the application of high-precision color copiers, scanners and various digital printing equipment has become increasingly common. Cards, bank cards and other cards are increasingly engaged in illegal and criminal activities, and cards based on traditional printing anti-counterfeiting technology are facing more attacks and challenges. In order to curb the occurrence of the above-mentioned criminal activities, most countries have invested huge sums of money and adopted high-tech means to improve the anti-counterfeiting technology level of cards. [0003] Card laser anti-counterfeiting technology, simply put, is to use laser technology to record the visual reading information of the document that needs to be ...
Claims
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Application Information
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