Automatic filling and low-temperature heat-sealing composite film for hot sauce and preparation method of composite film

Abstract

The invention provides an automatic filling and low-temperature heat-sealing composite film for hot sauce and a preparation method of the composite film. The method comprises the steps that polyethylene raw materials with different physical properties are blended, a three-layer co-extrusion film blowing machine is adopted for blowing to form a three-layer co-extrusion corona layer, the three-layerco-extrusion corona layer is composed of an inner-layer base film, a middle-layer base film and an outer-layer base film, and a printing layer is connected to the outer-layer base film in a compositemode. During preparation, for packaging of hot sauce with the temperature of 80-90 DEG C, the inner-layer base film, the middle-layer base film and the outer-layer base film are prepared by adoptinga three-layer co-extrusion upward blowing method; a printing layer and the outer-layer base film are compounded in a solvent-free mode, a material with high mechanical strength is effectively combinedwith the three-layer co-extrusion film, a composite film having a multi-layer composite structure and excellent comprehensive performance is obtained, and the composite film which meets low-temperature heat sealing and is suitable for high-speed automatic hot filling is manufactured.

Description

【Technical Field】 [0001] The invention relates to a flexible packaging composite film technology, in particular to a hot sauce automatic filling low-temperature heat-sealing composite film and a preparation method thereof. 【Background technique】 [0002] With the continuous development of the packaging industry and the improvement of effective efficiency, food factories are using automatic packaging machines to abandon prefabricated packaging bags to improve production efficiency. Automatic packaging machines are different from prefabricated packaging bags. They do not need to be made into bags, but are used for packaging. Automatic packaging is realized on the machine through a series of processes such as automatic forming, filling and heat sealing. In automatic packaging, choosing a good food packaging film material must first meet a certain degree of safety. Not only must the materials made must be environmentally friendly and non-toxic, but also have good anti-insect and anti...

AI Technical Summary

Problems solved by technology

[0003] Especially for the current high-speed automatic filling of various hot sauces. When hot sauces are packaged, the temperature is generally between 80 and 90 ° C. The requirements for various properties of the co-extrusion film are very high, and the heat sealing temperature of the heat sealing layer is too high. It will affect the packaging efficiency; when the heat-sealing temperature of the heat-sealing layer is low, the hot sauce itself is hot-filled at 80 to 90°C, which will also affect the packaging in the production process; at the same time, in the automatic packaging process, it is also necessary to Materials with high mechanical strength are effectively combined with co-extruded films; therefore, in the automatic filling industry of various hot sauces, there is an urgent need for a composite film that is compatible with high-speed production and heat-sealing temperature