Moisture resistance packaging film

Abstract

The invention discloses a moisture resistance packaging film and the packaging film comprises an ACLAR film layer, a PVDC film layer blocking vapor, and a heat sealing layer blow molded by polyethylene particles modified with montmorillonite master batch; the upper end of the heat sealing layer is adhered together with a printing film layer for printing patterns demanded for packaging through an adhesive; the ACLAR film layer, the PVDC film layer, the heat sealing layer and the printing film layer are adhered through a polyurethane adhesive. The packaging film adopts the PVDC film layer and has strong barrier property and good moisture resistance and humidity resistance; the PVDC film layer is adopted in a packaging bag, thereby facilitating to moisture resistance of the packaging bag. The packaging film has the advantages of simple structure and convenient operation, moisture absorbed by food can be reduced by directly using the moisture resistance of the packaging bag to prevent the bag from wetting; thus the packaging film has the large market popularization and application value for food packaging.

Description

technical field

[0001] The invention relates to a packaging film, in particular to a moisture-proof packaging film. Background technique

[0002] Some solid foods currently on the market, such as biscuits, candies, etc., have a desiccant bag in the packaging bag to absorb the water vapor or other humidity generated in the packaging bag and keep the inside of the packaging bag in a dry state. environment of. Usually after the packaging bag is opened, it is easy to lose or discard the desiccant bag. If the packaging bag is sealed again, the biscuits, candies and other solid foods in the packaging bag can easily absorb external moisture, become damp, soft, or even deteriorate. , directly affect the quality of food.

[0003] In response to this, the measures to be taken are to eat the food within the specified time after opening the packaging bag; or keep the desiccant bag in the packaging bag all the time so that it cannot be lost. Take above-mentioned measure, brought great...

Examples

Embodiment 1

[0025] Such as figure 1 As shown, a moisture-proof packaging film, including an Aclar film layer 1, a PVDC film layer 2 that blocks water vapor, and a heat-sealing layer blown from polyethylene particles modified by montmorillonite masterbatches in sequence from the inside to the outside 3. The upper end of the heat-sealing layer 3 is bonded to the printed film layer 4 for printing the required pattern of packaging through an adhesive; the Aclar film layer 1, PVDC film layer 2, heat-sealing layer 3, and printed film layer 4 Both are bonded with polyurethane adhesive.

[0026] Among them, the Aclar film layer 3 is a polychlorotrifluoroethylene film with excellent barrier properties and chemical stability advantages. Aclar film 3 has a composite barrier film that can reduce cross-permeation and effectively isolate water vapor. It is the preferred material for solid food packaging to avoid moisture absorption. Aclar film 3 film is crystal clear and transparent, does not contain...

Embodiment 2

[0030] In this embodiment, on the basis of Embodiment 1, the printed film layer 4 is a PA film, and a polyvinyl alcohol coating is provided between the printed film layer 4 and the heat-sealing layer. The Aclar film layer 3 is a fluorine-containing polymer film layer, and the Aclar film is a polychlorotrifluoroethylene material, which has excellent water blocking properties and can effectively prevent external moisture from entering the food packaging bag. The coating amount of the Aclar film layer 3 is 2-3.5g / m3. The coating amount of the Aclar film layer 3 depends on the degree of fusion with the PVDC film layer 2. The two can be well glued together and have good formability. Other structures and principles involved in this embodiment are common knowledge in the field and will not be repeated here.

Embodiment 3

[0032] In this embodiment, on the basis of the above embodiments, the printed film layer 1 is further described as a transparent stretched film. The material used for the printing film layer 1 is any one of BOPP, BOPET and BOPA. The printing film layer 1 is the outermost layer of the packaging film, which is convenient for printing characters, patterns and the like. Other structures and principles involved in this embodiment are common knowledge in the field and will not be repeated here.

[0033] The solid food packaging bag described in this embodiment not only satisfies transparency and is convenient for users to observe, but also has strong moisture resistance to prevent external water vapor or moisture from entering the packaging bag and affecting the quality of food. In addition, it is convenient for consumers to use, and there is no need to worry about losing the desiccant bag, or it must be used within the specified time, which is very convenient for consumers and can...

technical field

[0001] The invention relates to a packaging film, in particular to a moisture-proof packaging film. Background technique

[0002] Some solid foods currently on the market, such as biscuits, candies, etc., have a desiccant bag in the packaging bag to absorb the water vapor or other humidity generated in the packaging bag and keep the inside of the packaging bag in a dry state. environment of. Usually after the packaging bag is opened, it is easy to lose or discard the desiccant bag. If the packaging bag is sealed again, the biscuits, candies and other solid foods in the packaging bag can easily absorb external moisture, become damp, soft, or even deteriorate. , directly affect the quality of food.

[0003] In response to this, the measures to be taken are to eat the food within the specified time after opening the packaging bag; or keep the desiccant bag in the packaging bag all the time so that it cannot be lost. Take above-mentioned measure, brought great...

Examples

Embodiment 1

[0025] Such as figure 1 As shown, a moisture-proof packaging film, including an Aclar film layer 1, a PVDC film layer 2 that blocks water vapor, and a heat-sealing layer blown from polyethylene particles modified by montmorillonite masterbatches in sequence from the inside to the outside 3. The upper end of the heat-sealing layer 3 is bonded to the printed film layer 4 for printing the required pattern of packaging through an adhesive; the Aclar film layer 1, PVDC film layer 2, heat-sealing layer 3, and printed film layer 4 Both are bonded with polyurethane adhesive.

[0026] Among them, the Aclar film layer 3 is a polychlorotrifluoroethylene film with excellent barrier properties and chemical stability advantages. Aclar film 3 has a composite barrier film that can reduce cross-permeation and effectively isolate water vapor. It is the preferred material for solid food packaging to avoid moisture absorption. Aclar film 3 film is crystal clear and transparent, does not contain...

Embodiment 2

[0030] In this embodiment, on the basis of Embodiment 1, the printed film layer 4 is a PA film, and a polyvinyl alcohol coating is provided between the printed film layer 4 and the heat-sealing layer. The Aclar film layer 3 is a fluorine-containing polymer film layer, and the Aclar film is a polychlorotrifluoroethylene material, which has excellent water blocking properties and can effectively prevent external moisture from entering the food packaging bag. The coating amount of the Aclar film layer 3 is 2-3.5g / m3. The coating amount of the Aclar film layer 3 depends on the degree of fusion with the PVDC film layer 2. The two can be well glued together and have good formability. Other structures and principles involved in this embodiment are common knowledge in the field and will not be repeated here.

Embodiment 3

[0032] In this embodiment, on the basis of the above embodiments, the printed film layer 1 is further described as a transparent stretched film. The material used for the printing film layer 1 is any one of BOPP, BOPET and BOPA. The printing film layer 1 is the outermost layer of the packaging film, which is convenient for printing characters, patterns and the like. Other structures and principles involved in this embodiment are common knowledge in the field and will not be repeated here.

[0033] The solid food packaging bag described in this embodiment not only satisfies transparency and is convenient for users to observe, but also has strong moisture resistance to prevent external water vapor or moisture from entering the packaging bag and affecting the quality of food. In addition, it is convenient for consumers to use, and there is no need to worry about losing the desiccant bag, or it must be used within the specified time, which is very convenient for consumers and can...

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