Legal certificate visual anti-fake component and preparation method thereof
A technology of certificates and components, which is applied in the field of visual anti-counterfeiting components of statutory certificates and its preparation, can solve problems such as difficulty in mastering, and achieve the effects of special manufacturing process, enhanced pressure resistance, and prevention of collapse
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[0032] The preparation method of the legal document visual anti-counterfeiting component of the present invention comprises the following steps:
[0033] Step 1: Fabrication of PETG film. Using the casting method, through the mutual cooperation of the extrusion amount and the stretching speed, the thickness of the film is controlled to be 35 ~ 120μ, and the thickness is detected online by using the principle of different light transmittance of the film of different thickness; PETG particle heating temperature The temperature is 180-270°C; use twin-screw feeding to ensure that the feeding cavity rate (the ratio of feeding volume to cavity volume) can be fed at a uniform speed and evenly between 0% and 100%; the vacuum method is used to replace the original heating method to remove PETG particles Eliminate water vapor blasting from the inner layer of the film at high temperature and leave a blast hole on the surface of the film, commonly known as "air trap"; twin-screw feeding m...
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