CN214239799U - Composite film for food packaging bag - Google Patents

Abstract

The utility model belongs to the technical field of the complex film, concretely relates to complex film for food package bag, include: the inner layer is a heat sealing layer containing an antibacterial agent and is attached to the surface of the food; one surface of the barrier layer is attached to the inner layer so as to separate the food from the external environment; one surface of the elastic film layer is attached to the barrier layer so as to improve the toughness of the composite film; the outer layer, one side of the said outer layer is laminated with elastic membranous layer, in order to improve the ductility of the complex film; the inner layer, the barrier layer, the elastic film layer and the outer layer are sequentially connected through adhesive bonding. The composite film for the food packaging bag adds the antibacterial agent into the heat sealing layer, can effectively inhibit the growth of microorganisms on the surface of food, does not need a low-temperature refrigeration technology, can save energy and can also reduce the sale cost of the food.

Description

Composite film for food packaging bag

Technical Field

The utility model belongs to the complex film field, concretely relates to complex film for food package bag.

Background

The food packaging film is a high polymer material which is used for wrapping the surface of food and is mainly used for isolating and decomposing the entering of microbe bacteria and external pollutants and preventing and prolonging the deterioration of the food.

At present, plastic films for food packaging are various in variety, but the packaging films for food packaging and sealing with the existing structures cannot effectively inhibit the growth of microorganisms on the surfaces of foods, so that the storage time of the foods is short.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a complex film for food package bag to solve the technical problem that the food package film of prior art can't restrain the microbial growth on food surface effectively.

In order to solve the technical problem, the utility model provides a complex film for food package bag, include: the inner layer is a heat sealing layer containing an antibacterial agent and is attached to the surface of the food; one surface of the barrier layer is attached to the inner layer so as to separate the food from the external environment; one surface of the elastic film layer is attached to the barrier layer so as to improve the toughness of the composite film; the outer layer, one side of the said outer layer is laminated with elastic membranous layer, in order to improve the ductility of the complex film; the inner layer, the barrier layer, the elastic film layer and the outer layer are sequentially connected through adhesive bonding.

Further: a plurality of grooves are formed in the inner layer to increase the fit degree of the composite film and food.

Further: the elastic film layer is a polyurethane film.

Further: and a waterproof layer is arranged between the barrier layer and the inner layer.

Further: the inner layer is a polypropylene heat-sealing film.

Further: the outer layer is a polyethylene film.

Further: the adhesive is polyurethane adhesive.

The composite film for the food packaging bag has the advantages that the antibacterial agent is added on the heat sealing layer, so that the growth of microorganisms on the surface of food can be effectively inhibited, the low-temperature refrigeration technology is not needed, the energy can be saved, and the sale cost of the food can be reduced; the elastic film layer is used as a buffer layer, so that the strength and toughness of the composite film can be further improved, and the composite film can be better attached to and wrapped in food.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a preferred embodiment of the composite film for food packaging bags according to the present invention.

In the figure:

1. an inner layer; 11. a groove; 2. a barrier layer; 3. an elastic film layer; 4. an outer layer; 5. and a waterproof layer.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

FIG. 1 is a schematic view of a composite film for a food packaging bag according to the present invention;

as shown in fig. 1, the present embodiment provides a composite film for a food packaging bag, including: the inner layer 1 is a heat-sealing layer containing an antibacterial agent and is attached to the surface of a food; one surface of the barrier layer 2 is attached to the inner layer 1, so that the food is blocked from the external environment; one surface of the elastic film layer 3 is attached to the barrier layer 2 so as to improve the toughness of the composite film; the outer layer 4, one side of the outer layer 4 is jointed with the elastic film layer 3 to improve the ductility of the composite film; the inner layer 1, the barrier layer 2, the elastic film layer 3 and the outer layer 4 are sequentially connected through adhesive bonding. The antibacterial agent is added into the heat sealing layer, so that the growth of microorganisms on the surface of the food can be effectively inhibited, a low-temperature refrigeration technology is not needed, energy can be saved, and the sale cost of the food can be reduced; the elastic film layer 3 is used as a buffer layer, so that the strength and toughness of the composite film can be further improved, and food can be better attached and wrapped; the barrier layer 2 can not only block bacteria, water vapor, oil stains and impurities in the external environment, but also block the smell on food, and blocks the smell inside and outside to prolong the freshness date of the food.

In the present embodiment, the antibacterial agent is in the heat seal layer, taking into consideration the heat stability of the antibacterial agent and the compatibility with the packaging material.

In this embodiment, a plurality of grooves 11 are formed in the inner layer 1 to increase the degree of adhesion between the composite film and food. In the using process of the composite film, the inner layer 1 is attached to the food more tightly in the process of attaching the inner layer to the food so as to increase the contact area of the inner layer and the food; moreover, the grooves 11 can further improve the extensibility of the composite film and can be stretched longer.

In this embodiment, the elastic film layer 3 is a polyurethane film. The polyurethane film has the advantages of high strength, good toughness and high stretchability, and the ductility of the composite film can be further improved.

In this embodiment, a waterproof layer 5 is provided between the barrier layer 2 and the inner layer 1. The waterproof layer 5 increases the moisture resistance of the packaging film and isolates water vapor, thereby avoiding the influence of the environmental humidity on the food quality and avoiding the packaged food from being damped and rotten.

Alternatively, the inner layer 1 may be, but is not limited to, a polypropylene heat-sealing film.

Specifically, the polypropylene heat-sealing film has high strength, can be stretched in two directions, has good extensibility, and can be attached to food more tightly.

Alternatively, the outer layer 4 may be, but is not limited to, a polyethylene film.

Specifically, the polyethylene film has higher heat resistance, tensile strength, heat shrinkage rate, barrier property and other properties, and can effectively protect food so as to prolong the shelf life of the food.

Alternatively, the adhesive may be, but is not limited to, a polyurethane adhesive.

In summary, the utility model provides a high-strength vacuum skin shrink film, the antibacterial agent is added in the heat sealing layer, which can effectively inhibit the growth of microorganisms on the surface of food, and the low-temperature refrigeration technology is not needed, thus not only saving energy, but also reducing the sale cost of food; the elastic film layer 3 is used as a buffer layer, so that the strength and toughness of the composite film can be further improved, and food can be better attached and wrapped; the groove 11 is arranged to be more tightly attached to the food so as to increase the contact area of the groove and the food; moreover, the grooves 11 can further improve the extensibility of the composite film and can be stretched longer; the waterproof layer 5 increases the moisture resistance of the packaging film and isolates water vapor, thereby avoiding the influence of the environmental humidity on the food quality and avoiding the packaged food from being damped and rotten.

All the parts of the devices selected in the present application are general standard parts or parts known to those skilled in the art, and the structures and principles thereof can be known to those skilled in the art through technical manuals or through routine experimental methods.

In the description of the embodiments of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (7)

1. A composite film for a food packaging bag, comprising:

the inner layer is a heat sealing layer containing an antibacterial agent and is attached to the surface of the food;

one surface of the barrier layer is attached to the inner layer so as to separate the food from the external environment;

one surface of the elastic film layer is attached to the barrier layer so as to improve the toughness of the composite film;

the outer layer, one side of the said outer layer is laminated with elastic membranous layer, in order to improve the ductility of the complex film;

the inner layer, the barrier layer, the elastic film layer and the outer layer are sequentially connected through adhesive bonding.

2. The composite film for food packaging bag according to claim 1, wherein the inner layer is provided with a plurality of grooves to increase the fit of the composite film with the food.

3. The composite film for food packaging bags according to claim 2, wherein the elastic film layer is a polyurethane film.

4. The composite film for food packaging bag according to claim 1, wherein a waterproof layer is provided between the barrier layer and the inner layer.

5. The composite film for food packaging bags according to claim 1, wherein the inner layer is a polypropylene heat-seal film.

6. The composite film for food packaging bags according to claim 1, wherein the outer layer is a polyethylene film.

7. The composite film for food packaging bags according to claim 1, wherein the adhesive is a polyurethane adhesive.

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