Production method of extinction silent adhesive tape base film

Abstract

The invention discloses a production method of an extinction silent adhesive tape base film. One surface layer of the base film adopts an extinction material, maleic anhydride grafted polypropylene isadded, the material has the high polarity, when corona surface treatment is carried out, the higher surface treatment effect can be achieved and maintained through the low treatment strength, silicone oil is easily coated, on the other hand, after treatment, in the subsequent splitting process, noise is obviously reduced, a produced product has the extinction effect, and the vision effect of theadhesive tape can be improved.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a method for manufacturing a base film of a biaxially stretched polypropylene matte silent adhesive tape. Background technique [0002] Since the 1980s, the domestic BOPP tape base film has been used more and more widely, and the annual usage has increased by about 10%. In particular, many products need to be packed and sealed after they are manufactured. They all use automatic winding tapes. During the unwinding process, due to the stickiness of the tapes, there will be a lot of noise, which will bring great harm to the lives of the workers in the workshop and the residents around the factory. sound pollution. Moreover, most of the current tapes are mainly transparent. In order to improve the color of the base film of the tape after printing and have a more visual effect, without the need for light transmission, some manufacturers proposed a matting effect. Therefor...

AI Technical Summary

Problems solved by technology

However, since polypropylene is a non-polar material, it is difficult to combine with silicone oil, so it is necessary to use corona / flame, and the treatment intensity should be high, but it will bring the following new problems: high treatment intensity will affect the base film Mechanical properties, such as tensile properties and elongation at break, and increased risk of blocking

And the BOPP product with double-sided corona / flame treatment is used, because both sides have polar groups, and because the surface of the BOPP film is very smooth, there is almost no air between layers, during the production process and subsequent During processing, due to the cross-linking effect of polar groups, there will be problems of adhesion between layers and difficult unwinding.

This problem cannot be overcome by adding anti-blocking agents with generally smaller particle sizes