Release film for producing synthetic leather and preparing method of release film

Abstract

The invention relates to release film for producing synthetic leather and a preparing method of the release film. The release film for producing the synthetic leather comprises a PET film layer and apress pattern layer which are laminated in sequence, and the press pattern layer is prepared from, by mass, 65%-75% of UV resin, 15%-25% of flatting agent and 5%-15% of photosensitizer. The release film for producing the synthetic leather is good in temperature resistance, can resist high temperature of 140-155 DEG C in the producing process of the synthetic leather, cannot curl, is not easily brittle and not easily tore, resists yellow discoloration and can be repeatedly utilized 80-100 times.

Description

technical field [0001] The invention relates to the field of synthetic leather production, in particular to a release film for synthetic leather production and a preparation method thereof. Background technique [0002] Synthetic leather is favored by consumers because of its beautiful and changeable texture design. The formation of existing synthetic leather surface texture requires the use of release paper, and usually the base material of the release paper uses long-fiber bottom paper. Due to the consideration of process cost in the production of synthetic leather, the release paper is required to be reused 20-40 times, but the defects of the paper substrate include difficult to remove, brittle, easy to tear, not resistant to solvents, and poor flatness , easy yellowing, etc., are difficult to obtain technical solutions. [0003] At present, PET film is used to bond CPP or PE to prepare release film in the market, but in the production of synthetic leather, in order to r...

AI Technical Summary

Problems solved by technology

In order to cooperate with the rapid curing of the surface of synthetic leather, the temperature of the oven will reach between 140-155°C. If CPP or PE is used to bond PET to make the release paper (because of the difference in temperature resistance and tension), it will inevitably cause the surface to have The thermal shrinkage of CPP or PE in the texture will cause the texture to deform and increase the defective rate in the synthetic leather process

If the oven temperature is lowered for production to meet the temperature and tension of PET, CPP or PE, the speed can only be controlled at 5-8m / min, which will greatly affect production efficiency