Preparation process of hot-melt adhesive blown film and film blowing machine for preparing the hot-melt adhesive blown film

Abstract

The invention relates to a preparation process and a film blowing machine for preparing a hot melt adhesive blown film, in particular to a process and device for preparing a blown film by means of hot melt adhesives such as EVA, copolyester and copolyamide. The novel hot melt adhesive blown film preparation process is mainly provided, the film blowing machine specially used for preparing the hot melt adhesive blown film is designed, the special film blowing machine is utilized for leading in an anti-block agent solution from a film head in the film bubble forming stage of the hot melt adhesive blown film, the anti-block agent solution is atomized by means of diffusion gas and uniformly sprayed and attached to the inner surfaces of film bubbles, the solvent is discharged through a suction channel after volatilizing, the anti-block agent solution is distributed on the inner surfaces of the film bubbles only, the outer surfaces of the film bubbles and an adhesive film body do not contain an anti-block agent, the bonding performance is hardly changed correspondingly, and restraint of a traditional method is overcome; and the proper amount of the anti-block agent solution enables the inner surfaces of the film bubbles to be opened easily, the anti-block agent content of the inner surface of the film bubbles is adjusted by designing the concentration and the feeding speed of the anti-block agent solution, accordingly the inner surfaces of the film bubbles are opened at a linear cut side when the anti-block agent use level is minimum, and the hot melt adhesive product with the excellent performance is finally obtained.

Description

technical field [0001] The present invention relates to a kind of preparation technology of hot-melt adhesive blown film and the film blowing machine used for preparing the hot-melt adhesive blown film, especially relate to the technology and the process of using EVA, copolyester, copolyamide and other hot melt adhesives to prepare blown film. its equipment. Background technique [0002] As a solid adhesive material mainly composed of thermoplastic resin, hot melt adhesive is widely used in printing, packaging, clothing, shoe materials, construction, automotive interior lights and other fields. The rapid development of the hot-melt adhesive industry and the continuous improvement of hot-melt adhesive products have also put forward higher requirements for the molding process and equipment of its products. [0003] Among the many polymer molding processing methods, film blowing has the advantages of rapidity, continuity, and energy saving, and has been widely used in the indu...

AI Technical Summary

Problems solved by technology

These organic or inorganic anti-opening agents are evenly dispersed in the film, which can often significantly improve the opening of the blown film product, but at the same time sacrifice the adhesive properties of the film.

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