CN212289071U - Polypropylene composite film with antibacterial effect - Google Patents

Abstract

The application relates to a polypropylene composite film with antibacterial effect, including the inner film, be used for the outer membrane of printing and be located the inner film with be used for between the outer membrane to separate the intermediate film of oxygen and vapor, the inner film is including the polypropylene film with inlay the antibacterial agent in the polypropylene film. By the arrangement, the composite film has a good antibacterial effect, can effectively prevent food from deteriorating, and prolongs the shelf life of the food; moreover, the composite film has strong stiffness, water vapor barrier property and oxygen barrier property, and can slow down the putrefaction speed of contents.

Description

Polypropylene composite film with antibacterial effect

Technical Field

The application relates to the technical field of product packaging, in particular to a polypropylene composite film with an antibacterial effect.

Background

Most of the existing product packages are packaged by using plastic bags, the plastic bags are processed by using composite films, the composite films are film structures formed by compounding multiple layers of material films, and corresponding use characteristics are achieved by compounding. The existing composite film has limited capability of preventing food from deteriorating, can not well inhibit the breeding of bacteria in a packaging bag, and needs to add a preservative into food to influence the eating.

Therefore, how to solve the problems that the existing composite film has limited capability of preventing food from deteriorating and the packaged food is easy to deteriorate is a key technical problem to be solved by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the related art at least to a certain extent, the present application aims to provide a polypropylene composite film with antibacterial effect, which can solve the problems that the existing composite film has limited capability of preventing food from deteriorating and the packaged food is easy to deteriorate.

The application provides a polypropylene composite film with antibacterial effect, including the inner film, be used for the outer membrane of printing and be located the inner film with be used for between the outer membrane to separate the intermediate film of oxygen and vapor, the inner film is including the polypropylene film with inlay the antibacterial agent in the polypropylene film.

Preferably, an ink layer is disposed between the outer layer film and the intermediate film.

Preferably, the outer layer film and the intermediate film, and the intermediate film and the inner layer film are compounded together through an adhesive.

Preferably, the antibacterial agent comprises antibacterial master batches uniformly distributed on the surface of the polypropylene film.

Preferably, one part of the antibacterial master batch is embedded in the polypropylene film, and the other part of the antibacterial master batch is positioned outside the polypropylene film.

Preferably, the thickness of the inner film is set to 20-130 um.

Preferably, the outer layer film is arranged as a polyester film or a biaxially oriented polypropylene film or a polyamide film.

Preferably, the thickness of the outer layer film is set to 10 to 50 um.

Preferably, the intermediate film is provided as an aluminum foil or an aluminum-plated film or an EVOH film or a silicon oxide film.

Preferably, the thickness of the intermediate film is set to 7-40 um.

The technical scheme provided by the application can comprise the following beneficial effects:

the inner layer film comprises a polypropylene film and an antibacterial agent, wherein the polypropylene film is a main component of the inner layer film and plays a corresponding role in heat sealing during processing, and the antibacterial agent is embedded in the polypropylene film so that the inner layer film has the function of inhibiting bacteria or killing the bacteria. Specifically, the antibacterial agent is added in the process of casting the polypropylene film in a blowing way, and the antibacterial agent is uniformly distributed in the polypropylene film by fully stirring and mixing, so that the inside of the polypropylene film has a corresponding antibacterial effect. By the arrangement, the composite film has a good antibacterial effect, can effectively prevent food from deteriorating, and prolongs the shelf life of the food; moreover, the composite film has strong stiffness, water vapor barrier property and oxygen barrier property, and can slow down the putrefaction speed of contents.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only 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 cross-sectional view of the present polypropylene composite film with antimicrobial effect, according to some exemplary embodiments;

fig. 2 is a schematic structural view of an inner film, according to some exemplary embodiments.

In the figure: 1. an outer film; 2. an intermediate film; 3. an inner layer film; 4. an adhesive; 5. a polypropylene film; 6. an antibacterial master batch.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus or methods consistent with aspects of the present application.

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to fig. 1-2, the present embodiment provides a polypropylene composite film with antibacterial effect, which includes an inner film 3, an intermediate film 2 and an outer film 1, wherein the inner film 3 is located inside the composite film, that is, the inner film 3 is located inside a packaging bag after the packaging bag is made, so as to improve the antibacterial performance of the product; the intermediate film 2 is positioned between the inner layer film 3 and the outer layer film 1, is mainly used for improving the stiffness, the water vapor barrier property and the oxygen barrier property of the composite film and can slow down the putrefaction speed of contents; outer membrane 1 is used for the printing to make and form printing characters or pattern on the surface of this complex film, and mark product information, can promote the wearability of this complex film through outer membrane 1's setting simultaneously.

The inner layer film 3 comprises a polypropylene film 5 and an antibacterial agent, wherein the polypropylene film 5 is the main component of the inner layer film 3 and plays a corresponding role in heat sealing during processing, and the antibacterial agent is embedded in the polypropylene film 5 so that the inner layer film 3 has the function of inhibiting bacteria or killing bacteria. Specifically, the antibacterial agent is added in the process of blowing the cast polypropylene film 5, and the antibacterial agent is uniformly distributed in the polypropylene film 5 by fully stirring and mixing, so that the corresponding antibacterial effect is achieved in the polypropylene film 5. Here, the antibacterial agent is of both inorganic and organic types, which can inhibit the growth of bacteria and fungi on the surface of plastics or kill them.

It should be noted that the addition of the antimicrobial agent has little effect on the haze of the polypropylene film 5, and can effectively suppress the growth of mold and algae.

By the arrangement, the composite film has a good antibacterial effect, can effectively prevent food from deteriorating, and prolongs the shelf life of the food; moreover, the composite film has strong stiffness, water vapor barrier property and oxygen barrier property, and can slow down the putrefaction speed of contents.

In this embodiment, an ink layer is provided between the outer layer film 1 and the intermediate film 2, and specifically, the ink layer is attached to the surface of the outer layer film 1 to form a predetermined shape, and then is combined with the intermediate film 2, and the composite film is given a color by ink, thereby providing good appearance and practicality.

The outer film 1 and the intermediate film 2, and the intermediate film 2 and the inner film 3 are all compounded together through an adhesive 4, wherein a layer of adhesive 4 is arranged between the outer film 1 and the intermediate film 2, and between the intermediate film 2 and the inner film 3, and two adjacent layers are adhered together through the adhesive 4 to achieve certain compound strength. Thus, the processing is convenient, and the composite stability can be improved.

In some preferred schemes, the antibacterial agent includes an antibacterial master batch 6, the antibacterial master batch 6 is provided with a plurality of and evenly distributed on the surface of the polypropylene film 5, here, the antibacterial master batch 6 is distributed on one side of the polypropylene film 5 far away from the intermediate film 2, and the antibacterial effect is further improved.

It should be noted that different antibacterial masterbatches 6 can be added into the polypropylene film 5, and the antibacterial masterbatches 6 specific to a certain strain can be selected by studying the main factors of food deterioration, so as to achieve the positioning sterilization effect.

Wherein, 6 wherein some inlays in polypropylene film 5 in antibiotic master batch 6, outside another part is located polypropylene film 5, specifically, this antibiotic master batch 6 has bulb and pole portion, and the pole portion sets up along the radial extension of bulb, and pole portion inlays in polypropylene film 5's inside, and the bulb is located outside polypropylene film 5, because the surface area of bulb is great, can with the bacterial contact on 5 surfaces of polypropylene film, and then strengthen antibacterial effect.

Specifically, the thickness of the inner film 3 is set to 20 to 130um, which facilitates the insertion of the antibacterial agent during processing.

In some embodiments, the outer film 1 is a polyester film, a biaxially oriented polypropylene film, or a polyamide film, which has better printability and corresponding high temperature resistance, and can improve the wear resistance.

Specifically, the thickness of the outer layer film 1 is set to 10 to 50 um.

The intermediate film 2 is formed of an aluminum foil, an aluminum-plated film, an EVOH (Ethylene vinyl alcohol copolymer) film, or a silicon oxide film, and further improves various physical properties of the composite film, such as oxygen barrier property, water vapor transmission rate, and light-shielding property.

Specifically, the thickness of the intermediate film 2 is set to 7 to 40 um.

It should be noted that the composite film not only has an antibacterial effect, but also can be used to achieve different application characteristics by compounding other materials, such as an antibacterial composite film with high barrier property, an antibacterial composite film with puncture resistance, and the like.

The key steps in the production of the composite membrane will now be described with reference to the above examples.

Printing: the method comprises the steps of using a material corresponding to dyne water to detect the surface tension of the raw material before printing, testing whether the raw material meets the printing requirement, then installing a printing plate roller, adjusting the ink with different colors to the viscosity suitable for printing according to the customized requirement of a customer, and reducing and copying the printed product required by the customer. When the workshop is continuously produced, the workshop QA is used for carrying out sample pasting inspection and parallel sample pasting for comparing and controlling the colors in the production process. And after the whole batch of products are produced, the sample cards are filed as batch production records.

Compounding: and compounding the rubberized biaxially oriented polyester substrate with an aluminum foil. The compounding speed is controlled to be 90 +/-10 m/min, and the compounding pressure is controlled to be 0.4-0.7 MPa. The compounding speed is too fast, so that the solvent can not be volatilized in time in the production process easily, appearance flaws and the like are not easy to find, and the final heat sealing effect and the antibacterial effect of the product can be influenced by too large or too small compounding pressure. In the production process, workshop production personnel set the speed and the pressure of the compound machine, alarm is given when the speed and the pressure exceed a set range, and the captain cooperates with the personnel of the equipment department to perform troubleshooting and make deviation records. After the first compounding, compounding the semi-finished product and the cast polypropylene film again, controlling the compounding speed to be 130 +/-10 m/min, the compounding pressure to be 0.4-0.7MPa, and controlling the unreeling tension of the cast polypropylene film to be 0.2 +/-0.1 Kg. In the production process, workshop production personnel set the speed and the pressure of the compound machine, alarm is given when the speed and the pressure exceed a set range, and the captain cooperates with the personnel of the equipment department to perform troubleshooting and make deviation records.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (10)

1. The polypropylene composite film with the antibacterial effect is characterized by comprising an inner film (3), an outer film (1) used for printing and an intermediate film (2) positioned between the inner film (3) and the outer film (1) and used for blocking oxygen and water vapor, wherein the inner film (3) comprises a polypropylene film (5) and an antibacterial agent embedded in the polypropylene film (5).

2. The polypropylene composite film having an antibacterial effect according to claim 1, wherein an ink layer is provided between the outer layer film (1) and the intermediate film (2).

3. The polypropylene composite film having antibacterial effect according to claim 1 or 2, wherein the outer film (1) and the intermediate film (2), the intermediate film (2) and the inner film (3) are compounded together by an adhesive (4).

4. The polypropylene composite film having antibacterial effect according to claim 1, wherein the antibacterial agent comprises antibacterial mother particles (6) uniformly distributed on the surface of the polypropylene film (5).

5. The polypropylene composite film having antibacterial effect according to claim 4, wherein the antibacterial mother particles (6) are partially embedded in the polypropylene film (5) and partially located outside the polypropylene film (5).

6. The polypropylene composite film having an antibacterial effect according to claim 1, wherein the thickness of the inner film (3) is set to 20-130 um.

7. The polypropylene composite film having an antibacterial effect according to claim 1, wherein the outer film (1) is provided as a polyester film or a biaxially oriented polypropylene film or a polyamide film.

8. The polypropylene composite film having an antibacterial effect according to claim 7, wherein the thickness of the outer layer film (1) is set to 10-50 um.

9. The polypropylene composite film having an antibacterial effect according to claim 1, wherein the intermediate film (2) is provided as an aluminum foil or an aluminum-plated film or an EVOH film or a silicon oxide film.

10. The polypropylene composite film having an antibacterial effect according to claim 9, wherein the thickness of the intermediate film (2) is set to 7-40 um.

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