Copying-proof film based on organic membrane structure and its preparation

Abstract

The invention relates to materials for an anti-copy film, in particular to the anti-copy film based on the structure of an organic film and preparation of the same. The anti-copy film uses dithizone metal salt as light-absorbing materials; compositions of the materials of the anti-copy film are the light-absorbing materials, plasticizing agents and PVC; and the mass ration of the light-absorbing materials, the plasticizing agents and the PVC is 1 to 20-600 to 10-120. The anti-copy film plays a part in preventing copy of a file covered by the film under the condition that the reading effect isnot affected. A method for preparing the anti-copy materials is simple, does not need complex synthetic procedures, affects the reading effect little, and is particularly suitable for the anti-copy requirements of general character files or general graph files.

Description

technical field

[0001] The invention relates to an anti-copying film material, in particular to an anti-copying film based on an organic film structure and its preparation. Background technique

[0002] With the rapid development of science and technology, copying technology is becoming more and more perfect, and the problem of anti-copying of confidential documents has become increasingly prominent. In view of its importance in the fields of national defense and public security, many countries have invested a lot of manpower and material resources in research.

[0003] The research on anti-copying materials began in the 1970s. European and American developed countries and Japan have done a lot of research work in this area. Foreign countries have developed anti-copying technology research into a very important subject. In recent years, many researchers in China have engaged in similar research work, but the technology is not yet very mature.

[0004] The principle of ant...

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