A kind of repeatedly heat-sealing film for food and its repeatedly heat-sealing packaging film

Abstract

The invention discloses a repeated heat-sealing film for food. The repeated heat-sealing film is a three-layer co-extruded blown film, comprising a surface layer, a middle layer and an inner layer laminated in sequence, and the surface layer includes the following raw materials in parts by weight: 50-60 parts of LLDPE, 40-50 parts of LDPE, 8-10 parts of modified MFC particles, 0.1-0.2 parts of PPA particles, 1-2 parts of flow accelerator, 0.1-0.5 parts of anti-blocking agent, 0.5-1 parts of slip agent The middle layer comprises the following raw materials in parts by weight: 50-60 parts of LLDPE, 40-50 parts of LDPE, 4-8 parts of modified MFC particles and 0.5-1.5 parts of flow accelerator; the inner layer comprises the raw materials of the following parts by weight: 50-60 parts of LLDPE, 40-50 parts of LDPE, 8-10 parts of modified MFC particles, 0.1-0.2 parts of PPA particles, 1-2 parts of flow promoter. The invention also discloses a repeatedly heat-sealing packaging film for food. The repeated heat-sealing film for food and its packaging film for repeated heat-sealing provided by the invention have good processability, improved heat resistance and mechanical strength, a wider heat-sealing temperature range, and effectively reduced peeling of the heat-sealing interface. It has good repeated peeling-heat sealing performance.

Description

Technical field [0001] The present invention relates to the field of packaging technology, specifically to a food with repeated heat sealing film and its repeated heat sealing packaging film. Background [0002] PE film is polyethylene film, often used in the packaging of various foods, the traditional PE film is first made into PE film packaging bags, and then filled with products to the packaging bag, the heat sealing film on both sides of the bag is heat sealed, which can be well preserved and maintained product quality. [0003] However, the current food packaging bag heat sealing edge can not be uncovered, consumers need to make the gap in the bag, take the product from the gap; but in the food (such as tea) can not be used at one time or the amount of packaging is more but the amount of one take is less, the use of tear gap unpacking, the size and volume of the bag become smaller, is not conducive to the re-sealing preservation and carrying, want to achieve repeated sealin...

AI Technical Summary

Problems solved by technology

[0003] However, the heat-sealed side of the current food packaging bag cannot be opened, and consumers need to tear the gap on the packaging bag to take the product from the gap; but when the food (such as tea) cannot be used at one time or the packaging volume However, when the amount to be taken at one time is small, the size and volume of the packaging bag will become smaller if the tearing gap is used to unpack it, which is not conducive to re-sealed storage and carrying. To achieve repeated sealing, it is generally necessary to add functional components to achieve it. resealable effect

These newly added parts have some disadvantages. First, some newly added parts cannot achieve the effect of complete sealing, which shortens the food storage time in the packaging bag and deteriorates the food quality; secondly, the newly added parts increase more The production cost of the packaging bag, and even the added components are higher than the value of the packaging bag itself or the product inside the packaging bag, which will further increase the consumption cost of consumers; Combination, which seriously affects the production efficiency of packaging bags