Packaging film without fuzzing in bag making and manufacturing method thereof

Abstract

The invention discloses a packaging film without fuzzing in bag making and a making method thereof.The packaging film comprises a three-layer co-extrusion film blowing machine for film blowing to form a three-layer co-extrusion layer, the three-layer co-extrusion layer is composed of an inner-layer base film, a middle-layer base film and an outer-layer base film, the inner-layer base film is a heat-sealing layer, the outer-layer base film is a corona treatment layer or a composite layer, and the middle-layer base film is a heat-sealing layer. The inner-layer base film comprises the following components in percentage by mass: 40%-50% of LLDPE (Linear Low Density Polyethylene), 50%-53% of LDPE (Low Density Polyethylene), 5%-8% of MLLDPE (Metallocene Leverage Polyethylene), 0.5%-2.5% of an opening slipping agent and 0.2%-0.4% of PPA ( The middle-layer base film is prepared from the following components in percentage by mass: 49 to 51 percent of LLDPE (Linear Low Density Polyethylene), 50 to 52 percent of LDPE (Low Density Polyethylene) and 0.2 to 0.4 percent of PPA (Polypropylene Acrylate); and the outer-layer base film comprises the following components in percentage by mass: 49%-51% of LLDPE (Linear Low Density Polyethylene), 50%-52% of LDPE (Low Density Polyethylene) and 0.2%-0.4% of PPA (Polypropylene Acrylate). By increasing the proportion of LDPE, adjusting the proper proportion and reducing the elongation at break of the PE film, the effects that fuzzing is avoided during bag cutting, and the other physical properties do not affect the quality of a finished product are achieved; and finished product bag making feedback is achieved, through multiple times of batch bag making, the burr problem is basically avoided during bag cutting each time, and the defect that burrs are likely to be generated in the prior art is overcome.

Description

technical field [0001] The invention relates to the technical field of packaging films, in particular to a lint-free packaging film for bag making and a manufacturing method thereof. Background technique [0002] Eight-side sealing plastic packaging bag is a bag type of gravure printing composite flexible packaging. At present, it is mainly used in the packaging of some products with high added value, such as food, coffee, pet food, tea and some cosmetics. [0003] In the prior art, problems such as fluffing frequently occur when manufacturers make eight-sided sealing bags. The reason is that ordinary bags have only two layers of thickness, while the bottom of eight-sided sealing bags has four layers of thickness. Debris is easy to cause foreign matter to be mixed in, and it will fall into the food and affect food safety. According to analysis, most of the burrs are PE. Therefore, the market needs to develop a lint-free packaging film for bag making. SUMMARY OF THE INVENT...

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Problems solved by technology

[0003] In the prior art, manufacturers frequently have problems such as fluffing when making eight-side-seal bags. The reason is that ordinary bags have only two layers of thickness, while the bottom of eight-side-seal bags has four layers of thickness. It is easy to fluff when cutting out by a bag-making machine. This kind of burrs Debris is easy to cause foreign matter to mix in, falling into the food and affecting food safety

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