CN218430334U

CN218430334U - Biodegradable composite film for moon cake packaging

Info

Publication number: CN218430334U
Application number: CN202222532961.XU
Authority: CN
Inventors: 李智尧; 魏婕; 廖贵何
Original assignee: Xiamen Changsu Industrial Co Ltd
Current assignee: Xiamen Changsu Industrial Co Ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-02-03
Anticipated expiration: 2032-09-23

Abstract

The utility model discloses a biodegradable composite film for moon cake packaging, which is provided with a heat sealing layer, a middle layer and a printing layer from inside to outside in sequence; the heat sealing layer is a heat-sealable biaxially oriented BOPLA film; the middle layer is made of biodegradable polyurethane glue; the printing layer is a PGA film; the corona surface of the heat-sealing layer is connected with the middle layer; the printing surface of the printing layer is connected with the middle layer. The utility model discloses a moon cake packing composite film with biodegradability, which has excellent biodegradability and reduces 'white pollution'; and the mooncake has excellent oxygen and water resistance, so that the taste of the mooncake is not lost, and the shelf life is prolonged. Meanwhile, the composite film also has excellent heat sealing performance and good market application value.

Description

Biodegradable composite film for moon cake packaging

Technical Field

The utility model belongs to the food packaging film field, concretely relates to compound film is used in moon cake packing with biodegradable.

Background

The traditional moon cakes in the early period are not packaged, and with the development of society, people begin to package the moon cakes by using paper boxes or plastic packaging bags, so that the moon cakes are convenient to transport and deliver. Meanwhile, the bought moon cake is easily damaged if the bought moon cake is not packaged and eaten in time.

Composite films for packaging moon cakes in the market at present comprise PET/PE, NY/PE and the like. The PET/PE has no biodegradability and excellent barrier property, and influences the taste and the quality guarantee period of the moon cake; NY/PE is soft, has better oxygen resistance than PET/PE, but has no biodegradation performance, is not environment-friendly and is easy to cause white pollution.

Therefore, it is very necessary to develop a biodegradable composite film for moon cake packaging with excellent barrier property.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's weak point, provide a compound film is used in moon cake packing with biodegradable, not only solved in the above-mentioned background but also the problem that can not biodegradable and cause "white pollution" easily, solved moreover and hindered oxygen water resistance ability poor, influence the problem of shelf life and taste.

5. The utility model provides a technical scheme that its technical problem adopted is: the composite film for packaging the biodegradable moon cakes is provided, and the heat sealing layer, the middle layer and the printing layer are sequentially arranged from inside to outside; the heat sealing layer is a heat-sealable biaxially oriented BOPLA film; the middle layer is made of biodegradable polyurethane glue; the printing layer is a PGA film; the corona surface of the heat-sealing layer is connected with the middle layer; the printing surface of the printing layer is connected with the middle layer.

In a preferred embodiment of the present invention, the thickness of the heat sealing layer is 25 to 40um.

In a preferred embodiment of the present invention, the thickness of the intermediate layer is 1.0-2.0 um.

In a preferred embodiment of the present invention, the thickness of the printing layer is 15 to 25um.

Compared with the prior art, the technical scheme has the following advantages:

1. the utility model discloses a BOPLA film combines together with PGA film and obtains composite film, make full use of two-layer direct advantage, coordinate the reinforcing, easily realize good performance, satisfy the various performance requirements of moon cake packing, solved moon cake packaging film and not had excellent oxygen blocking water resistance, easily had steam and oxygen to get into the packaging film and cause the moon cake rotten problem that influences the taste, and do not have biodegradable properties, easily cause plastic film "white pollution" scheduling problem;

2. the heat-sealing layer of the utility model adopts the heat-sealable biaxially oriented BOPLA film, which not only has good heat-sealing performance, but also has high light transmission, low fog degree and excellent biodegradability;

3. the middle layer of the utility model adopts biodegradable polyurethane glue, which not only has the advantages of rapid low-temperature curing, large bonding strength, but also has excellent biodegradability;

4. the utility model discloses a what printing layer adopted is the PGA film, not only has excellent oxygen performance and the performance of blocking water of hindering, also has high printing opacity simultaneously, low haze, the good performance such as printability, and has excellent biodegradable properties.

Drawings

FIG. 1 is a schematic view of a layer structure of a composite membrane according to an embodiment of the present invention,

wherein, the printing layer comprises 10-heat sealing layer, 20-middle layer and 30-printing layer.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are further described below with reference to the accompanying drawings and examples, which may have different forms and should not be construed as being limited to the descriptions set forth herein. Like numbers refer to like elements throughout, and similar numbers refer to similar elements.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the perspective views of the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, the term "inner" refers to the side contacting the content, and the term "outer" refers to the side away from the content.

As shown in figure 1, the composite film for packaging the biodegradable moon cakes sequentially comprises a heat sealing layer (10), an intermediate layer (20) and a printing layer (30) from inside to outside; the heat sealing layer (10) is a heat-sealable biaxially oriented BOPLA film, the thickness is 40um, and an ESL heat-sealable BOPLA film produced by Xiamen Long-Plastic industry Co., ltd is adopted; the middle layer (20) is made of biodegradable polyurethane glue with the thickness of 1.0um; the printing layer (30) is a PGA film with the thickness of 15um and is made of PGA raw materials of Shanghai Pujing chemical technology GmbH.

Through a plurality of tests and comparison, the production cost of the composite film is combined, the cost performance of the composite film is highest, the composite film is tested for relevant performance, and the specific result data are shown in the following table:

table 1 composite film performance test for moon cake packaging

As can be seen from the above table, the biodegradable composite film for packaging moon cakes provided by the embodiment has excellent water vapor and oxygen barrier properties, and can prolong the shelf life of the moon cakes and prevent the taste of the moon cakes from being changed; meanwhile, the composite film also has excellent heat sealing performance, and can prevent moon cakes from delaminating and leaking in the heat sealing process during transportation, so that the moon cakes are damaged; moreover, the composite film also has the advantages of biodegradability, environmental protection, no white pollution and good market application value.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A composite film with biodegradability for moon cake packaging is characterized in that: the heat sealing layer, the middle layer and the printing layer are sequentially arranged from inside to outside; the heat sealing layer is a heat-sealable biaxially oriented BOPLA film; the middle layer is made of biodegradable polyurethane glue; the printing layer is a PGA film; the corona surface of the heat-sealing layer is connected with the middle layer; the printing surface of the printing layer is connected with the middle layer.

2. The composite film with biodegradability for moon cake packaging according to claim 1, wherein: the thickness of the heat sealing layer is 25-40 um.

3. The composite film for moon cake packaging, which is biodegradable according to claim 1, wherein: the thickness of the heat sealing layer is 1.0-2.0 um.

4. The composite film with biodegradability for moon cake packaging according to claim 1, wherein: the thickness of the printing layer is 15-25 um.