CN218577225U

CN218577225U - Composite film for coffee bean packaging

Info

Publication number: CN218577225U
Application number: CN202222533766.9U
Authority: CN
Inventors: 魏婕; 李智尧
Original assignee: Fujian Changsu Industrial Co ltd
Current assignee: Fujian Changsu Industrial Co ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-03-07
Anticipated expiration: 2032-09-23

Abstract

The utility model discloses a composite film for packaging coffee beans, which is provided with a heat sealing layer, a first bonding layer, a middle layer, a second bonding layer and a surface layer from inside to outside in sequence; the heat sealing layer is a heat-sealable BOPLA film; the first bonding layer is biodegradable solvent-free polyurethane adhesive; the middle layer is an aluminized BOPLA film; the second adhesive layer is a biodegradable moisture reaction type hot melt adhesive layer; the surface layer is kraft paper; the aluminum surface of the aluminized BOPLA film of the middle layer is connected with the first bonding layer. The utility model has excellent oxygen resistance and low water vapor transmission rate, and can prevent oxygen and water vapor from entering the food through the packaging film to influence the shelf life and taste of the food; the production process has no solvent, is nontoxic and environment-friendly, has biodegradable performance, can generate biodegradability when contacting with microorganisms and water in soil after being used, cannot cause white pollution, and has good market application value.

Description

Composite film for coffee bean packaging

Technical Field

The utility model belongs to the technical field of food packaging film, concretely relates to coffee bean is complex film for packing.

Background

People all over the world increasingly like to drink coffee, and the accompanying "coffee culture" fills every moment of life. People, whether at home, in the office, or in various social situations, are coffee, which is increasingly linked to fashion, modern life, work, and leisure entertainment. When the coffee is made, firstly, the roasted coffee beans are put in a special grinder to be ground into powder, then, conical filter paper or a filter screen is padded on a coffee pot, the coffee powder is poured, hot water with the temperature of more than 95 ℃ is sprayed on the coffee pot, the coffee powder is uniformly brewed, then, the coffee pot is stood still for waiting for the coffee to be extracted, and finally, the extracted coffee is poured into a coffee cup for drinking.

At present, most packages on the market adopt common packages, namely glass jars, paper bags (kraft paper/PE), plastic containers (such as PET/PP, PET/PE, NY/PE and the like) and the like, wherein the glass jar packages are heavy and easy to bump in the transportation process; the paper bag packaging (kraft paper/PE) has poor gas barrier property, and the used bag is not easy to degrade, is easy to cause white pollution and is not environment-friendly; other plastic containers (such as PET/PP, PET/PE, NY/PE and the like) not only have poor barrier property and influence the shelf life, but also are difficult to degrade.

The structure adopted in patent CN211280094U, a biodegradable packaging bag, is composed of three materials of BOPLA, aluminized PLA and wood pulp paper, but the bonding layer is formed into a whole through dry compounding, and the solvent is discharged in the production process of the dry compounding, so that the dry compounding is not environment-friendly and can pollute air, and the dry compounding needs drying, so that the energy consumption is high. Meanwhile, the dry composite glue is not biodegradable and can cause pollution.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's weak point, provide a complex film is used in coffee beans packing, not only solved in the above-mentioned background nonbiodegradable, production process have volatilizing of solvent, and not environmental protection causes the problem of pollution easily, has solved moreover and has hindered the oxygen performance poor, problem that the vapor transmission rate is high.

In order to realize the above purpose, the utility model provides a technical scheme that its technical problem adopted is: the composite film for packaging coffee beans is provided, and is sequentially provided with a heat sealing layer, a first bonding layer, a middle layer, a second bonding layer and a surface layer from inside to outside; the heat sealing layer is a heat-sealable BOPLA film; the first bonding layer is biodegradable solvent-free polyurethane adhesive; the middle layer is an aluminized BOPLA film; the second adhesive layer is a biodegradable moisture reaction type hot melt adhesive layer; the surface layer is kraft paper; the aluminum surface of the aluminized BOPLA film of the middle layer is connected with the first bonding layer.

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

In a preferred embodiment of the present invention, the thickness of the first adhesive layer is 1.0-2.0 μm.

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

In a preferred embodiment of the present invention, the thickness of the second adhesive layer is 2.5-3.5 μm.

In a preferred embodiment of the present invention, the kraft paper has a grammage of 40-70 g/m ² 。

Compared with the background technology, the technical scheme has the following advantages:

1. the utility model adopts the combination of the heat-sealable BOPLA film, the aluminized BOPLA film and the kraft paper, the composite film for packaging coffee beans is obtained, the advantages of each layer are fully utilized, the coordination and the enhancement are realized, the good performance is easy to realize, the requirement of coffee bean packaging can be met, the problems that the oxygen resistance of the existing coffee bean packaging film is poor, the water vapor transmittance is high, the taste is influenced while the quality guarantee period is influenced, and the existing packaging film has no degradability, and the environmental pollution is easily caused are solved;

2. the inner layer of the utility model adopts the heat-sealable BOPLA film, which not only has excellent heat-sealing strength and better performance of smell barrier property, but also has excellent biodegradability;

3. the first bonding layer of the utility model adopts biodegradable solvent-free polyurethane adhesive, which not only can be rapidly cured at low temperature and has high bonding strength, but also can not generate solvent in the compounding process, is environment-friendly and has biodegradability;

4. the middle layer of the utility model is a biaxial stretching aluminized BOPLA film, which not only has excellent oxygen resistance, low water vapor transmission rate and better smell barrier performance, but also has excellent biodegradability;

5. the second adhesive layer of the utility model is a biodegradable moisture reaction type hot melt adhesive, which has the advantages of high bonding strength to the base material after curing, high solvent resistance and high heat resistance; in addition, the hot melt adhesive has excellent biodegradability; no solvent is generated in the compounding process, so that the method is environment-friendly;

6. the surface layer of the utility model is kraft paper, which is safe and sanitary, can be in direct contact with food, is anti-freezing and high temperature resistant, and has biodegradability;

drawings

FIG. 1 is a schematic view of a layer structure of a composite film according to an embodiment,

wherein, the adhesive comprises 10-heat sealing layer, 20-first adhesive layer, 30-middle layer, 40-second adhesive layer and 50-surface 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 reference numerals refer to like elements throughout, and similar reference numerals 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 fig. 1, a composite film for packaging coffee beans is provided with a heat-sealing layer (10), a first adhesive layer (20), an intermediate layer (30), a second adhesive layer (40) and a surface layer (50) in sequence 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 first adhesive layer (20) is biodegradable solvent-free polyurethane glue with the thickness of 1.5 mu m; the middle layer (30) is a biaxially oriented aluminized BOPLA film, the thickness of the middle layer is 15 mu m, and the biaxially oriented aluminized BOPLA film produced by Xiamen Long Plastic industry Co Ltd is adopted; the second adhesive layer (40) is a biodegradable moisture reaction type hot melt adhesive layer, the thickness is 3.2 mu m, and the moisture reaction type hot melt adhesive is high in adhesive strength, solvent resistance and heat resistance; the surface layer (50) is kraft paper, and the grammage produced by Dongguan Galli industry investment Limited company is 60g/m ² The food-grade kraft paper has the advantages of safety, sanitation, direct contact with food, freezing resistance, high temperature resistance and biodegradability.

Through multiple tests and comparison and the production cost of the composite membrane, the composite membrane of the embodiment has the highest cost performance, and the relevant performance is tested, and the specific result data is shown in the following table:

TABLE 1 composite Membrane Performance testing for coffee beans

As can be seen from the above table, the composite film for packaging coffee provided by the embodiment has a low water vapor transmission rate and a low oxygen transmission rate, and can prevent water vapor and oxygen from entering the packaging film into coffee beans to affect the shelf life and taste of the coffee beans; meanwhile, the composite film has excellent heat-sealing strength, can meet the heat-sealing requirement of a packaging bag, is compounded by solvent-free glue in the production process, does not generate a solvent, is environment-friendly and does not pollute the air; finally, each layer structure adopted by the composite film has biodegradability, is environment-friendly, does not have the problems of white pollution and the like, and can be widely applied to the field of food packaging materials, in particular to a paper-plastic composite bag for packaging coffee beans.

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 for packaging coffee beans is characterized in that: the heat-sealing layer, the first bonding layer, the middle layer, the second bonding layer and the surface layer are sequentially arranged from inside to outside; the heat sealing layer is a heat-sealable BOPLA film; the first bonding layer is biodegradable solvent-free polyurethane adhesive; the middle layer is an aluminized BOPLA film; the second adhesive layer is a biodegradable moisture reaction type hot melt adhesive layer; the surface layer is kraft paper; the aluminum surface of the aluminized BOPLA film of the middle layer is connected with the first bonding layer.

2. The composite film for packaging coffee beans according to claim 1, wherein: the thickness of the heat sealing layer is 25-40 μm.

3. A composite film for coffee bean packaging according to claim 1, wherein: the thickness of the first adhesive layer is 1.0-2.0 μm.

4. A composite film for coffee bean packaging according to claim 1, wherein: the thickness of the intermediate layer is 15-25 μm.

5. A composite film for coffee bean packaging according to claim 1, wherein: the thickness of the second adhesive layer is 2.5-3.5 μm.

6. A composite film for coffee bean packaging according to claim 1, wherein: the gram weight of the kraft paper is 40-70 g/m ² 。