Low-temperature heat-seal shrinking packaging film used for cigarettes and manufacturing method thereof

Abstract

The invention relates to a low-temperature heat-seal shrinking packaging film used for cigarettes. The packaging film comprises a surface layer A, a core layer B and a surface layer C; the surface layer A is prepared from, by mass, 70-80 parts of an ethylene-butene-propylene terpolymer, 2-10 parts of an ethylene-butene copolymer, 12-22 parts of a slipping agent, 3-13 parts of an antisticking agent and 0.5-1.5 parts of a wear-resisting agent, wherein the slipping agent is composed of erucyl amide and dimethicone, and the antisticking agent is composed of PMMA and silicon dioxide powder; the core layer B is prepared from 65-80 parts of homo-polypropylene, 24-32 parts of stiffness improving master batch and 2-6 parts of anti-static master batch; the surface layer C is prepared from 80-90 parts of an ethylene-butene-propylene terpolymer, 5-15 parts of ethylene-butene copolymerized elastomer, 2-5 parts of a slipping agent and 3-10 parts of an antisticking agent, the slipping agent is dimethicone and the antisticking agent is PMMA. The three-layer coextruded packaging film is lower in heat-seal temperature, energy consumption is reduced, and the cigarette case packaging quality is improved.

Description

technical field [0001] The invention belongs to the technical field of packaging films, and in particular relates to a packaging film for cigarettes capable of realizing low-temperature heat sealing and a manufacturing method thereof. Background technique [0002] At present, the heat-shrinkable cigarette film products produced by domestic cigarette film manufacturers must be heated during use to ensure the tightness of the cigarette case and the box skin. When packaging with common heat-shrinkable cigarette film, there will be problems that the package is not tightly attached, and there are wrinkles between the cigarette film and the cigarette case. Most cigarette factories solve this problem by adding a heating device. The use of the heating device makes the cigarette packs very close to a certain extent, but there are also obvious defects: [0003] ①Traditional ironing devices only heat the upper and lower surfaces of the two packs of cigarettes, and the contact parts be...

AI Technical Summary

Problems solved by technology

[0003] ①Traditional ironing devices only heat the upper and lower surfaces of the two packs of cigarettes, and the contact parts between the two packs of cigarettes cannot be ironed, so that the two surfaces that are not heated are more wrinkled than the two surfaces that are heated obvious;

[0004] ②Scalding causes the surface of the film to be heated and frictional, thus damaging the smoothness of the film and causing scratches on the surface of the film;

[0005] ③When the hood is shut down, the long-term contact between the heating device and the film will cause excessive shrinkage and melting of the film, which will affect the packaging quality;

[0006] ④ The maintenance and adjustment of the ironing device will bring more workload and time, which will affect the operating rate and output;

[0007] ⑤ The use of the ironing device consumes energy, which increases the packaging cost

[0008] In order to avoid the above-mentioned defects of the ironing device, by improving the composition of the cigarette film, the cigarette film can realize self-shrinkage, thereby achieving the purpose of improving the packaging quality and beautifying the appearance of the cigarette package. The fly in the ointment is that the heat-sealing temperature of the existing packaging film is relatively high Generally at 110-115°C, too high a heat-sealing temperature not only increases energy consumption, but also has a certain impact on the cigarette case, and the applicable requirements for the material of the cigarette case are also more stringent

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