A packaged product capable of displaying a packaging date

Abstract

The utility model relates to food packaging technical field, concretely is a kind of packaging product of displayable packing date, it can clearly show packing date on packaging bag, it includes packaging bag and portable heating device, irreversible temperature change ink layer is printed on the packaging bag, the irreversible temperature change ink layer is date information, portable heating device is provided with the heating head for heating the date information.

Description

Technical Field

[0001] This utility model relates to the field of food packaging technology, specifically to a packaging product that can display the packaging date. Background Technology

[0002] As people's requirements for food preservation increase, traditional food storage bags can no longer meet the needs, leading to the adoption of vacuum preservation methods. Traditional vacuum sealing machines can only seal vacuum bags after vacuuming, without displaying the packaging date. Therefore, existing vacuum sealing machines have begun to add date coding functions, such as those with announcement numbers CN220843292U and CN119284275A. Adding embossing mechanisms or character heat-printing devices to vacuum sealing machines achieves date display, but the process is cumbersome, requiring adjustments to the embossing mechanism or character heat-printing device based on the packaging date, making it inconvenient to use. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a packaging product that can display the packaging date, which can clearly display the packaging date on the packaging bag.

[0004] The technical solution is as follows: a packaged product that can display the packaging date, characterized in that it includes a packaging bag and a portable heating device, wherein the packaging bag is printed with an irreversible thermochromic ink layer, the irreversible thermochromic ink layer being date information, and the portable heating device is provided with a heating head for heating the date information.

[0005] A further feature is that the irreversible thermochromic ink layer is located at the edge of the packaging bag; The portable heating device is either a wireless heating device or a wired heating device.

[0006] By using this utility model, a specially designed packaging bag is used, and the date information is printed on the packaging bag in advance. When packaging food, the heating head on the portable heating device is used to heat the position of the packaging date, causing it to change color and thus clearly display the packaging date. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the product of this utility model; Figure 2 Schematic diagram of a portable heating device Figure 3 This is a schematic diagram of a packaging bag design. Detailed Implementation

[0008] See Figure 1As shown, a packaging product that displays the packaging date includes a packaging bag 1 and a portable heating device 2. The packaging bag 1 is printed with an irreversible thermochromic ink layer, which contains the date information, i.e., the date printing area 3. For transparent packaging bags, a less conspicuous color like white is generally used. A common format includes two sets of information: one for the months 1-12 and the other for the weeks 1-4. If precision to a specific day is required, days 1-31 can also be printed, which requires more space on the packaging bag. The date printing area 3 is located at the edge of the packaging bag 1, as shown... Figure 2 As shown, if heat sealing is used, the date printing area 3 must avoid the heat sealing position 4 to prevent the ink in the date printing area 3 from changing color during heat sealing.

[0009] like Figure 3 As shown, the date printing area 3 can be on one or both sides of the packaging bag 1, or on the open or closed side of the packaging bag 1, or at the corner of the packaging bag, so as to facilitate heating by the portable heating device 2.

[0010] The portable heating device 2 is equipped with a heating head 2-1 for heating date information. One such structure is shown in this embodiment. Figure 2 As shown, the upper part of the opening is the heating head 2-1 and the lower part is the support head 2-2. When the edge of the packaging bag extends into the opening and passes between the heating head 2-1 and the support head 2-2, press the top button 2-3 to move the heating head 2-1 down to contact the packaging bag 3, and heat up the contact area, so that the originally white date information changes to another conspicuous color, usually black.

[0011] Portable heating device 2 can be either a wireless heating device or a wired heating device. In this embodiment, a wired heating method is provided, that is, it is powered by a power supply connected to a power source via a power cord 3. Portable heating device 2 can also be wirelessly heated, that is, the portable heating device 2 is powered by a built-in battery, and the battery can be replaced or wirelessly charged when it is depleted.

[0012] The packaging process is as follows: (1) Put the food into the packaging bag and heat seal the opening of the packaging bag. If the packaging requires vacuum, use a vacuum sealer to first vacuum the packaging bag and then heat seal it.

[0013] (2) After sealing, use a portable heating device 2 to heat the corresponding date position of the packaging bag 1 according to the current packaging date, so that the irreversible thermochromic ink changes color from white to black, displaying the current date.

[0014] When packaged food is placed in the refrigerator, the date display, which has already changed color, will not fade again, making it easy to know the packaging time.

Claims

1. A packaged product capable of displaying the packaging date, characterized in that, It includes a packaging bag and a portable heating device. The packaging bag is printed with an irreversible thermochromic ink layer, which contains date information. The portable heating device is equipped with a heating head for heating the date information.

2. A packaged product capable of displaying the packaging date according to claim 1, characterized in that, The irreversible thermochromic ink layer is located at the edge of the packaging bag.

3. A packaged product capable of displaying the packaging date according to claim 1, characterized in that, The portable heating device is either a wireless heating device or a wired heating device.

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