Oxygen-indicating deoxidizer and method for producing the same

Abstract

The present invention provides an oxygen-indicating deoxidizer and a method for manufacturing the same. The oxygen-indicating deoxidizer comprises a breathable inner membrane for housing a deoxidizer element and a perforated outer membrane for housing the oxygen indicator element. The perforated outer membrane comprises a main body covering the breathable inner membrane and an indicator inlet extending outward from the main body to accommodate the oxygen indicator element. The indicator inlet comprises a longitudinally sealed edge region and a transparent region between the longitudinally sealed edge region and the main body and covering the oxygen indicator element. In the present invention, the deoxidizer element and the oxygen indicator element are separately packaged. The oxygen indicator element, housed in the indicator inlet, has high and stable air permeability due to the perforated outer membrane. Therefore, the oxygen indicator changes color quickly and accurately and directly reflects the deoxidation status of the deoxidizer element. The deoxidizer element is encased in the breathable inner membrane, which has a small pore size and prevents powder leakage. Furthermore, the area of ​​the indicator inlet covering the oxygen indicator element is a transparent region, so the color change of the oxygen indicator element can be observed from both sides of the oxygen-indicating deoxidizer through the transparent regions on both sides.

Description

Technical Field

[0001] The present invention relates to the technical field of deoxidizers, in particular to an oxygen-indicating deoxidizer and a manufacturing method thereof. Background Art

[0002] Oxygen-indicating deoxidizers generally consist of a deoxidizer element and an oxygen indicator. Adding the deoxidizer element to food packaging effectively inhibits the growth of mold and aerobic bacteria, extending the shelf life of food. It also plays a significant role in preventing oil rancidity, oxidative browning of meat, and vitamin loss in food. To verify the effectiveness of the deoxidizer element, many current deoxidizer products incorporate an oxygen indicator to determine its usability.

[0003] Currently, there are two ways to install an oxygen indicator. One is to attach the oxygen indicator to the deoxidizer bag. However, this method only allows the color change of the oxygen indicator to be observed from one side of the bag, which is not conducive to daily use. The other method is to place the oxygen indicator on the side of the deoxidizer. The oxygen indicator and the deoxidizer are both packaged in a full plastic film, and the plastic film is transparent in the area where the oxygen indicator is placed. This allows the color change of the oxygen indicator to be observed from both sides of the deoxidizer. The plastic film is made of PET / PE composite film with straight-through holes, PET / CPP composite film, or PET / PET / CPP composite film with staggered holes, or PET / PET / PE composite film. Because the oxygen indicator and the deoxidizer are both packaged in the same full plastic film, if the pore size of the plastic film is too small, the air permeability is too low and the air permeability is very unstable. The oxygen indicator changes color too slowly, which directly affects the accuracy of the deoxidizer's deoxygenation effect. If the pore size is too large, powder leakage occurs, which can contaminate food during use, resulting in inconvenience and a poor customer experience.

[0004] Therefore, how to balance the ability to observe the color change of the oxygen indicator on both sides while achieving stable air permeability, stable oxygen indicator color change, and significantly improved quality and safety of the oxygen indicating deoxidizer is a difficult problem that the industry urgently needs to consider. Summary of the Invention

[0005] In view of the above problems, the present invention aims to provide an oxygen-indicating deoxidizer and a method for manufacturing the same, which has stable air permeability, stable oxygen indicator color change, and can observe the color change of the oxygen indicator on both sides.

[0006] To achieve the above-mentioned objectives, the present invention provides an oxygen-indicating deoxidizer, comprising a breathable inner membrane for accommodating a deoxidizer component and a perforated outer membrane for providing an oxygen indicator component. The perforated outer membrane comprises a main body portion covering the breathable inner membrane and an indicator component introduction portion extending outward from the main body portion and accommodating the oxygen indicator component. The indicator component introduction portion comprises a longitudinal edge sealing area and a transparent area between the longitudinal edge sealing area and the main body portion and covering the oxygen indicator component.

[0007] In the oxygen-indicating deoxidizer of the present invention, the oxygen indicator is simultaneously encased in a breathable inner membrane and a perforated outer membrane, while the oxygen indicator is located only within the indicator introduction portion. Therefore, the deoxidizer and oxygen indicator can be installed separately. The oxygen indicator, located within the indicator introduction portion, has high and stable air permeability due to the perforated outer membrane. Therefore, the oxygen indicator changes color quickly, accurately and directly responding to the deoxidation status of the deoxidizer. The deoxidizer, encased in a breathable inner membrane with a smaller pore size, does not leak powder. Therefore, by separately encasing the deoxidizer and oxygen indicator, the oxygen-indicating deoxidizer of the present invention achieves stable air permeability and oxygen indicator color change, while also improving product quality and safety. Furthermore, the area of ​​the indicator introduction portion covering the oxygen indicator is a transparent area, so the color change of the oxygen indicator can be observed from both sides of the oxygen-indicating deoxidizer through the transparent areas on both sides.

[0008] As a preferred technical solution, the breathable inner membrane is a paper membrane or a three-layer composite membrane of PE layer / paper membrane / PE layer, and the PE layer is a PE perforated membrane with a pore size of 100~1000μm. By setting up a paper membrane, the deoxidizer can be prevented from leaking powder and gas permeation can be ensured.

[0009] As a preferred technical solution, the perforated outer film is a perforated PET / PE composite film or OPP / PE composite film with a pore size of 100-1000µm. This perforated pore size can ensure high air permeability and stable air permeability.

[0010] As a preferred technical solution, the main body and the breathable inner membrane are sealed on three sides to form a first transverse seal and a second transverse seal parallel to each other, and the first transverse seal and the second transverse seal are provided with a first longitudinal seal on the side close to the introduction part of the indicator.

[0011] As a preferred technical solution, the width W1 of the first longitudinal edge seal formed by the main body is greater than the width W2 of the first longitudinal edge seal formed by the inner breathable membrane. More preferably, W1 and W2 are independently 2-10 mm, with W1 being 1-2 mm greater than W2. This staggered sealing of the main body and inner breathable membrane prevents contact between the oxygen indicator and the inner breathable membrane, preventing the pigment in the oxygen indicator from seeping into the inner breathable membrane's paper film, thereby affecting the oxygen indicator's color.

[0012] As a preferred technical solution, the width of the first transverse edge seal formed by the main body is consistent with the width of the first transverse edge seal formed by the breathable inner membrane, and the width is 1~20mm. The width of the second transverse edge seal formed by the main body is consistent with the width of the second transverse edge seal formed by the breathable inner membrane, and the width is 1~20mm.

[0013] As a preferred technical solution, the width of the longitudinal edge sealing area is 0.1-10 mm, and the width of the transparent area is 0.5-10 mm.

[0014] As a preferred technical solution, the main body is a three-edge-sealed structure and forms a accommodating cavity for accommodating the breathable inner membrane. The main body includes a first transverse edge seal and a second transverse edge seal parallel to each other. The first transverse edge seal and the second transverse edge seal are provided with a first longitudinal edge seal on the side close to the introduction portion of the indicator.

[0015] As a preferred technical solution, the widths of the first transverse edge seal and the second transverse edge seal are consistent and range from 1 to 20 mm, and the width of the first longitudinal edge seal is 2 to 10 mm.

[0016] As a preferred technical solution, the oxygen indicator is an oxygen indicator tape or an oxygen indicator line, and the deoxidizer is a deoxidizer in the form of powder, flake, block, granular, liquid or paste.

[0017] To achieve the above-mentioned objectives, the present invention also provides a method for manufacturing an oxygen-indicating deoxidizer, comprising: vertically stacking a breathable inner film and a perforated outer film that is larger than the breathable inner film at least in the transverse direction, and placing the stacked films on a double-layer packaging machine; adding a deoxidizer to the breathable inner film and performing three-edge sealing on the breathable inner film and the perforated outer film; introducing an oxygen indicator between the excess dimensions of the perforated outer film and heat-sealing the edges of the perforated outer film.

[0018] The present invention can separately pack the deoxidizer component and the oxygen indicator component through two separate sealing steps, thereby achieving stable air permeability and stable color change of the oxygen indicator and improving product quality and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a perspective view of the oxygen-indicating deoxidizer of the present invention.

[0020] Figure 2 FIG. 1 is a partially folded view of the breathable inner film and the perforated outer film of the oxygen-indicating deoxidizer of the present invention after being stacked in a first situation.

[0021] Figure 3 FIG. 4 is a diagram showing the laminated gas permeable inner film and perforated outer film of the oxygen-indicating deoxidizer of the present invention in a second embodiment.

[0022] Component Symbol Description

[0023] 100 - oxygen-indicating deoxidizer; 10 - breathable inner membrane; 11 - first longitudinal edge seal; 30 - perforated outer membrane; 31 - body; 311 - first transverse edge seal; 313 - second transverse edge seal; 315 - first longitudinal edge seal; 33 - indicator lead-in; 331 - transparent area; 333 - longitudinal edge seal; 50 - oxygen indicator; W1 / W2 / W3 / W4 / W5 / W6 - width DETAILED DESCRIPTION

[0024] To better illustrate the purpose, technical solutions and beneficial effects of the present invention, the present invention will be further described below in conjunction with specific embodiments and accompanying drawings. It should be noted that the following specific embodiments are intended to further explain the present invention and should not be construed as limiting the present invention.

[0025] like Figures 1-3 As shown, the oxygen-indicating deoxidizer 100 includes a breathable inner film 10 for accommodating the deoxidizer component and a perforated outer film 30 on which the oxygen indicator 50 is provided. The perforated outer film 30 includes a main body 31 covering the breathable inner film 10 and an indicator introduction portion 33 extending outward from the main body 31 and accommodating the oxygen indicator 50. The indicator introduction portion 33 includes a longitudinal edge sealing area 333 and a transparent area 331 between the longitudinal edge sealing area 333 and the main body 31 and covering the oxygen indicator 50.

[0026] Continue as Figure 1 and 2 As shown, the main body 31 and the breathable inner membrane 10 are triple-sealed, forming a first transverse edge seal 311 and a second transverse edge seal 313 that are parallel to each other. A first longitudinal edge seal 315 is provided on the side of the first transverse edge seal 311 and the second transverse edge seal 313 that is adjacent to the indicator lead-in portion 33. The width W1 of the first longitudinal edge seal 315 formed by the main body 31 is greater than the width W2 of the first longitudinal edge seal 11 formed by the breathable inner membrane 10. More preferably, W1 and W2 are each independently 2 to 10 mm, with W1 being 1 to 2 mm greater than W2. This staggered sealing of the main body 31 and the breathable inner membrane 10 prevents the oxygen indicator 50 from contacting the breathable inner membrane 10, preventing the pigment in the oxygen indicator 50 from seeping into the paper film of the breathable inner membrane 10 and affecting the color of the oxygen indicator 50. The width W3 of the first transverse edge seal 311 formed by the main body 31 is consistent with the width of the first transverse edge seal formed by the breathable inner membrane 10 (not shown), and is 1 to 20 mm. The width of the second transverse edge seal 313 formed by the main body 31 is consistent with the width of the second transverse edge seal formed by the breathable inner membrane 10 (not shown), and is 1 to 20 mm. The width W5 of the longitudinal edge seal area 333 is 0.1 to 10 mm, and the width W6 of the transparent area 331 is 0.5 to 10 mm.

[0027] The manufacturing method of this type of oxygen-indicating deoxidizer 100 may include: vertically stacking a breathable inner film 10 and a perforated outer film 30 that is larger than the breathable inner film 10 at least in the transverse direction, placing the stack on a double-layer packaging machine, adding the deoxidizer to the breathable inner film 10, and sealing the breathable inner film 10 and the perforated outer film 30 together in a three-edge-sealed packaging process. An oxygen indicator 50 is inserted between the excess dimensions of the perforated outer film 30, and the edges of the perforated outer film 30 are heat-sealed. After sealing, the oxygen-indicating deoxidizer can be cut horizontally to form individual pieces, or directly rolled up and then cut for food packaging. This manufacturing method requires only two sealing steps, is simple to manufacture, highly efficient, and suitable for mass production.

[0028] The main body 31 and the breathable inner membrane 10 may also not be sealed with three edges at the same time, such as Figure 3 As shown, the main body 31 has a three-sealed edge structure and forms a housing cavity for the breathable inner membrane 10. The main body 31 includes a first transverse edge seal 311 and a second transverse edge seal 313 that are parallel to each other. A first longitudinal edge seal 315 is provided on the side of the first and second transverse edge seals 311, 313 that is adjacent to the indicator lead-in portion 33. The first and second transverse edge seals 311, 313 have the same width, ranging from 1 to 20 mm, while the first longitudinal edge seal 315 has a width of 2 to 10 mm.

[0029] The manufacturing method of the oxygen-indicating deoxidizer 100 of this structure may include: first, a breathable inner film and a deoxidizer body are triple-sealed to form a deoxidizer component; then, a perforated outer film 30 having a larger dimension than the breathable inner film 10 in at least the transverse direction is used to wrap the deoxidizer component and triple-sealed; then, an oxygen indicator 50 is introduced between the excess dimensions of the perforated outer film 30; and finally, the edges of the perforated outer film 30 are heat-sealed.

[0030] It should be further explained that the breathable inner membrane 10 is a paper film or a three-layer composite membrane consisting of a PE layer / paper film / PE layer, with the PE layer being a perforated PE membrane with a pore size of 100-1000 μm. This paper membrane prevents the deoxidizer from leaking while ensuring gas permeability. The perforated outer membrane 30 is a perforated PET / PE composite membrane or OPP / PE composite membrane with a pore size of 100-1000 μm. This perforation ensures high and stable air permeability. The oxygen indicator 50 is an oxygen indicator tape or oxygen indicator line, and the deoxidizer is in the form of a powder, sheet, block, granular, liquid, or paste. The main body 31 can be transparent, translucent, or opaque, depending on actual needs.

[0031] In the oxygen-indicating deoxidizer 100 of the present invention, the deoxidizer element is simultaneously wrapped by the breathable inner membrane 10 and the perforated outer membrane 30, while the oxygen indicator 50 is located only in the indicator introduction portion 33. Therefore, the deoxidizer element and the oxygen indicator 50 can be installed separately. The oxygen indicator 50 placed in the indicator introduction portion 33 has high air permeability and very stable air permeability due to the perforated outer membrane. Therefore, the oxygen indicator 50 changes color quickly and can accurately and directly respond to the deoxygenation status of the deoxidizer. The deoxidizer element is wrapped by the breathable inner membrane 10, and its pore size is small, so powder leakage will not occur. Therefore, by separately installing the deoxidizer element and the oxygen indicator 50, the oxygen-indicating deoxidizer 100 of the present invention can achieve stable air permeability and stable oxygen indication color change, while also improving product quality and safety. At the same time, the area of ​​the indicator introduction portion 33 covering the oxygen indicator 50 is a transparent area, so the color change of the oxygen indicator 50 can be observed from both sides through the transparent areas 331 on both sides of the oxygen-indicating deoxidizer 100.

[0032] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications and variations of these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles disclosed herein.

Claims

1. An oxygen indicating deoxidizer, characterized in that The invention comprises a breathable inner film for accommodating a deoxidizing agent and a perforated outer film for arranging an oxygen indicator. The perforated outer film comprises a main body portion covering the breathable inner film and an indicator introduction portion extending outward from the main body portion and accommodating the oxygen indicator. The indicator introduction portion comprises a longitudinal edge sealing area and a transparent area between the longitudinal edge sealing area and the main body portion and covering the oxygen indicator. The breathable inner film is a paper film or a PE layer / paper film / PE layer three-layer composite film. The perforated outer film is a perforated PET / PE composite film or an OPP / PE composite film. The longitudinal edge sealing area is a transparent area between the longitudinal edge sealing area and the main body portion and covering the oxygen indicator. The width of the transparent area is 0.1~10mm, the width of the transparent area is 0.5~10mm, the main body and the breathable inner membrane are sealed together to form a first transverse edge seal and a second transverse edge seal parallel to each other, the first transverse edge seal and the second transverse edge seal are provided with a first longitudinal edge seal on the side close to the introduction portion of the indicator, the width W1 of the first longitudinal edge seal formed by the main body is greater than the width W2 of the first longitudinal edge seal formed by the breathable inner membrane, W1 and W2 are each independently 2~10mm, and W1 is 1~2mm larger than W2.

2. The oxygen-indicating deoxidizer according to claim 1, characterized in that The PE layer in the breathable inner membrane is a PE perforated membrane with a pore size of 100-1000 μm.

3. The oxygen indicating deoxidizer according to claim 1, characterized in that The pore size of the perforated outer membrane is 100-1000 μm.

4. The oxygen indicating deoxidizer according to claim 1, characterized in that The width of the first transverse edge seal formed by the main body is consistent with the width of the first transverse edge seal formed by the breathable inner membrane, and the width is 1~20mm. The width of the second transverse edge seal formed by the main body is consistent with the width of the second transverse edge seal formed by the breathable inner membrane, and the width is 1~20mm.

5. The oxygen indicating deoxidizer according to claim 4, characterized in that The width of the first transverse edge seal and the second transverse edge seal is the same and is 1-20 mm, and the width of the first longitudinal edge seal is 2-10 mm.

6. The method for producing an oxygen-indicating deoxidizer according to any one of claims 1 to 5, wherein: include: A breathable inner film and a perforated outer film that is larger than the breathable inner film at least in the transverse direction are stacked in a vertical direction and placed on a double-layer packaging machine. A deoxidizer is added to the breathable inner film and the breathable inner film and the perforated outer film are packaged together with three edges sealed. An oxygen indicator is introduced between the excess dimensions of the perforated outer film and the edges of the perforated outer film are heat-sealed.

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