Microwave bag capable of increasing covering power

Abstract

The utility model discloses a microwave bag capable of increasing covering power, which comprises a bag piece, a part of wall surfaces of the bag piece are adhered together to form a bag body, the bag body is provided with a heat sealing part, the bag body is provided with a bag opening, the bag body is provided with a secondary sealing part, the secondary sealing part is U-shaped, the width of the secondary sealing part is smaller than that of the heat sealing part, and the width of the secondary sealing part is larger than that of the heat sealing part. And the two ends of the secondary sealing part are respectively provided with a heat sealing part. Compared with the prior art, the microwave bag capable of increasing the covering power has the following beneficial effects that two heat sealing bags with different sealing strengths, namely the heat sealing part and the secondary sealing part, are arranged on the bag body, the bag body can be used for sealing and packaging food, and the bag body can be automatically cracked when gas in the bag body expands during microwave heating, so that the probability of a bag explosion phenomenon is reduced.

Description

Technical Field

[0001] The utility model relates to the field of food packaging materials, in particular to a microwave bag with increased covering power. Background Art

[0002] Microwave heating technology is a cooking technique that uses microwave electromagnetic fields to vibrate food molecules and generate heat for heating. Due to its advantages such as fast heating speed, low energy consumption, and uniform heating, microwave heating technology is widely used in households, restaurants, and industrial production. Food packaging technology has gradually matured with the development of microwave heating technology. Its main purpose is to extend the shelf life of food while ensuring food quality and safety, and to facilitate transportation and storage. To facilitate the use of microwaves to heat food, patent publication CN203682196U discloses a microwave bag with increased hiding power for microwave heating of food. This microwave bag with increased hiding power features a long, strip-shaped vent area (numbered 4 in the figure) on the bag body. This vent area is composed of two unsealed membranes. However, this microwave bag with increased hiding power is leaky and cannot be used to seal food. Summary of the Invention

[0003] In response to the above-mentioned problems, the utility model proposes a microwave bag with increased covering power. The microwave bag with increased covering power is provided with two heat-sealed bags with different sealing strengths, namely a heat-sealed part and a secondary sealing part, on the bag body. The bag body can be used to seal and package food, and the bag body will automatically crack when the gas in the bag expands during microwave heating, thereby reducing the probability of the bag exploding.

[0004] The technical solutions adopted by this utility model are as follows:

[0005] A microwave bag with increased covering power includes bag sheets, part of the wall surfaces of the bag sheets are bonded together to form a bag body, the bag body is provided with a heat-sealing portion, the bag body is provided with a bag opening, and the bag body is provided with a secondary sealing portion. The secondary sealing portion is U-shaped, the width of the secondary sealing portion is smaller than the width of the heat-sealing portion, and the two ends of the secondary sealing portion are respectively heat-sealing portions.

[0006] Specifically, in this type of microwave bag with increased covering power, the heat-sealed part and the secondary sealed part on the bag body are both strips formed by heat-sealing and bonding the bag sheets. The difference is that the heat-sealed part has a wider width than the secondary sealed part, so that the heat-sealed part on the bag body has stronger pressure resistance than the secondary sealed part.

[0007] The method of using the microwave bag with increased hiding power is as follows: first, put the food into the bag body through the bag opening, and then seal the bag opening (the sealing can be vacuum sealed or non-vacuum sealed). At this time, the microwave bag with increased hiding power can achieve sealed preservation of the food.

[0008] When food needs to be heated in a microwave, directly put the food (together with the microwave bag that increases hiding power) into the microwave. The microwave heats the food in the microwave bag that increases hiding power. The moisture in the food evaporates due to the heat, and the volume of the gas in the microwave bag that increases hiding power expands. Since the heat sealing strength of the secondary seal is relatively low, the secondary seal will break, causing the bag to break and leak, thereby reducing the probability of the bag exploding during the heating process.

[0009] In summary, this microwave bag with increased covering power is provided with two heat-sealed parts with different sealing strengths on the bag body, namely a heat-sealed part and a secondary sealing part. The bag body can be used to seal and package food, and the bag body will automatically crack when the gas in the bag expands during microwave heating, thereby reducing the probability of bag explosion.

[0010] Optionally, the arc surface of the secondary sealing portion faces the inner side of the bag body.

[0011] Optionally, there are two secondary sealing parts, which are respectively located at two ends of the bag body.

[0012] Two secondary seals are set, and each secondary seal will break when the bag expands, which increases the safety factor and reduces the probability of bag explosion.

[0013] Optionally, the bag sheet includes a printed aluminum oxide PET film, an opalescent PET composite film, a nylon film and a polypropylene film, the opalescent PET composite film is arranged between the printed aluminum oxide PET film and the nylon film, and the nylon film is arranged between the opalescent PET composite film and the polypropylene film.

[0014] The bag is made of a composite of printed alumina PET film, milky white PET composite film, nylon film and polypropylene film. Since the printed alumina PET, milky white PET composite film and nylon film all have good stiffness and barrier properties, this can ensure that the prepared bag has good stiffness. At the same time, it ensures that the entire bag has good barrier and light-shielding properties, ensuring that the bag can have a longer shelf life when storing food.

[0015] Specifically, when using bag sheets to make bags, the polypropylene films on the bag sheets are used to be heat-sealed and bonded to each other. When the bag body is prepared, the polypropylene film on the bag sheet is located on the innermost side of the bag body, and the printed aluminum oxide PET is located on the outermost side of the bag body.

[0016] Optionally, it also includes a first glue layer, a second glue layer and a third glue layer, the first glue layer is arranged between the printed aluminum oxide PET film and the milky white PET composite film, the second glue layer is arranged between the milky white PET composite film and the nylon film, and the third glue layer is arranged between the nylon film and the polypropylene film. The thickness of the first glue layer is 1~2um, the thickness of the second glue layer is 1~2um, and the thickness of the third glue layer is 1~2um.

[0017] The first glue layer, the second glue layer and the third glue layer have the function of bonding and compounding. Specifically, the first glue layer, the second glue layer and the third glue layer may be made of polyurethane glue.

[0018] Optionally, it further includes a printing ink layer, which is arranged on the printed aluminum oxide PET film and located between the printed aluminum oxide PET film and the first glue layer, and the thickness of the printing ink layer is 1~1.5um.

[0019] Optionally, the thickness of the printed alumina PET film is 12 μm.

[0020] Optionally, the thickness of the milky white PET composite film is 15 μm.

[0021] Optionally, the thickness of the nylon membrane is 15um.

[0022] Optionally, the polypropylene film has a thickness of 70 μm.

[0023] The beneficial effects of the utility model are as follows: by arranging two heat-sealing bags with different sealing strengths, namely a heat-sealing part and a secondary sealing part, on the bag body, the bag body can be used to seal and package food, and the bag body will automatically crack when the gas in the bag body expands during microwave heating, thereby reducing the probability of the bag exploding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0025] Figure 1 This is a schematic diagram of the structure of a microwave bag that increases hiding power;

[0026] Figure 2 It is a schematic diagram of the structure of the bag.

[0027] The reference numerals in the figure are: 1. bag sheet; 11. bag opening; 101. printed aluminum oxide PET film; 102. printed ink layer; 103. first glue layer; 104. milky white PET composite film; 105. second glue layer; 106. nylon film; 107. third glue layer; 108. polypropylene film; 2. heat sealing part; 3. secondary sealing part. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0031] As attached Figure 1 And attached Figure 2 As shown, a microwave bag with increased covering power includes a bag sheet 1, part of the wall surface of the bag sheet 1 is bonded together to form a bag body, the bag body is provided with a heat-sealing part 2, the bag body is provided with a bag opening 11, and the bag body is provided with a secondary sealing part 3. The secondary sealing part 3 is a U-shaped secondary sealing part 3, the width of the secondary sealing part 3 is smaller than the width of the heat-sealing part 2, and the two ends of the secondary sealing part 3 are respectively the heat-sealing parts 2.

[0032] Specifically, in this type of microwave bag with increased covering power, the heat-sealed part 2 and the secondary sealed part 3 on the bag body are both strips formed by heat-sealing and bonding the bag sheet 1. The difference is that the heat-sealed part 2 has a wider width than the secondary sealed part 3, so that the heat-sealed part 2 on the bag body has stronger pressure resistance than the secondary sealed part 3.

[0033] The method of using the microwave bag with increased hiding power is as follows: first, put the food into the bag body through the bag opening 11, and then seal the bag opening 11 of the bag body (the sealing can be vacuum sealed or non-vacuum sealed). At this time, the microwave bag with increased hiding power can achieve sealed preservation of the food.

[0034] When food needs to be heated in a microwave, the food (together with the microwave bag that increases hiding power) is directly placed in the microwave. The microwave heats the food in the microwave bag that increases hiding power. The moisture in the food evaporates due to the heat, and the volume of the gas in the microwave bag that increases hiding power expands. Since the heat seal strength of the secondary seal 3 is relatively low (heat seal strength is 25-40 N / 15mm), the secondary seal 3 will break, causing the bag to break and leak, thereby reducing the probability of the bag exploding during the heating process.

[0035] In summary, the microwave bag with increased covering power is provided with two heat-sealed bags with different sealing strengths, namely a heat-sealed part 2 (heat-sealed strength 50-67 N / 15mm) and a secondary sealing part 3 on the bag body. The bag body can be used to seal and package food, and the bag body will automatically crack when the gas in the bag expands during microwave heating, thereby reducing the probability of bag explosion.

[0036] As attached Figure 1 And attached Figure 2 As shown, the arc surface of the secondary sealing portion 3 faces the inner side of the bag body.

[0037] As attached Figure 1 And attached Figure 2 As shown, there are two secondary sealing parts 3, and the two secondary sealing parts 3 are respectively located at the two ends of the bag body.

[0038] Two secondary sealing parts 3 are provided, and each secondary sealing part 3 will break when the bag body expands, so that the safety factor is higher and the probability of bag explosion is lower.

[0039] As attached Figure 1 And attached Figure 2 As shown, the bag sheet 1 includes a printed aluminum oxide PET film 101, an opalescent PET composite film 104, a nylon film 106 and a polypropylene film 108. The nylon film 106 is arranged between the opalescent PET composite film 104 and the polypropylene film 108, and the opalescent PET composite film is arranged between the printed aluminum oxide PET film 101 and the nylon film 106.

[0040] The bag sheet 1 is composited with a printed alumina PET film 101, an opalescent PET composite film 104, a nylon film 106 and a polypropylene film 108. Since the alumina PET film 101, the opalescent PET composite film 104 and the nylon film 106 all have good stiffness and barrier properties, this ensures that the prepared bag body has good stiffness, while ensuring that the entire bag body has good barrier and light-shielding properties, ensuring that the bag body can have a longer shelf life when storing food.

[0041] Specifically, when the bag sheet 1 is used to make a bag, the polypropylene film 108 on the bag sheet 1 is used to be heat-sealed and bonded to each other. When the bag body is prepared, the polypropylene film 108 on the bag sheet 1 is located on the innermost side of the bag body, and the printed aluminum oxide PET film 101 is located on the outermost side of the bag body.

[0042] As attached Figure 1 And attached Figure 2 As shown, it also includes a first glue layer 103, a second glue layer 105 and a third glue layer 107. The first glue layer 103 is arranged between the printed aluminum oxide PET film 101 and the milky white PET composite film 104, the second glue layer 105 is arranged between the milky white PET composite film 104 and the nylon film 106, and the third glue layer 107 is arranged between the nylon film 106 and the polypropylene film 108. The thickness of the first glue layer 103 is 1~2um, the thickness of the second glue layer 105 is 1~2um, and the thickness of the third glue layer 107 is 1~2um.

[0043] The first glue layer 103 , the second glue layer 105 and the third glue layer 107 function to bond and composite. Specifically, the first glue layer 103 , the second glue layer 105 and the third glue layer 107 may be made of polyurethane glue.

[0044] As attached Figure 1 And attached Figure 2 As shown, it also includes a printing ink layer 102, which is arranged on the printed PET film 101, and the printing ink layer 102 is located between the printed PET film 101 and the first glue layer 103, and the thickness of the printing ink layer 102 is 1-1.5 um.

[0045] The specific printing ink layer is a thick white printing ink layer, and a milky white PET film is selected. This can ensure that the entire bag has a high covering performance and is not easy to fade into milky white when heated at high temperature. Therefore, the use of the bag sheet with the above structure to make the bag increases the covering power of the entire microwave bag.

[0046] As attached Figure 1 And attached Figure 2 As shown, the thickness of the printed alumina PET film 101 is 12 μm.

[0047] As attached Figure 1 And attached Figure 2 As shown, the thickness of the milky white PET composite film 104 is 15 μm.

[0048] As attached Figure 1 And attached Figure 2 As shown, the thickness of the nylon membrane 106 is 15 μm.

[0049] As attached Figure 1 And attached Figure 2 As shown, the thickness of the polypropylene film 108 is 70 μm.

[0050] The above-described embodiments only express some embodiments of the present invention. The description is relatively specific and detailed, but it should not be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, it is still possible to modify the technical solutions described in the above-mentioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this utility model should be included in the scope of protection of this utility model.

Claims

1. A microwave bag with increased covering power, comprising bag sheets, wherein part of the wall surfaces of the bag sheets are bonded together to form a bag body, the bag body is provided with a heat-sealing portion, and the bag body is provided with a bag opening, characterized in that: The bag body is provided with a secondary sealing portion, which is a U-shaped secondary sealing portion. The width of the secondary sealing portion is smaller than the width of the heat sealing portion, and both ends of the secondary sealing portion are heat sealing portions.

2. The microwave bag with increased hiding power according to claim 1, characterized in that: The arc surface of the secondary sealing portion faces the inner side of the bag body.

3. The microwave bag with increased hiding power according to claim 1, characterized in that: There are two secondary sealing parts, which are respectively located at two ends of the bag body.

4. The microwave bag with increased hiding power according to claim 1, characterized in that: The bag sheet includes a printed aluminum oxide PET film, an opalescent PET composite film, a nylon film and a polypropylene film. The nylon film is arranged between the opalescent PET composite film and the polypropylene film, and the opalescent PET composite film is arranged between the printed aluminum oxide PET film and the nylon film.

5. The microwave bag with increased hiding power according to claim 4, characterized in that: It also includes a first glue layer, a second glue layer and a third glue layer. The first glue layer is arranged between the printed aluminum oxide PET film and the milky white PET composite film, the second glue layer is arranged between the milky white PET composite film and the nylon film, and the third glue layer is arranged between the nylon film and the polypropylene film. The thickness of the first glue layer is 1~2um, the thickness of the second glue layer is 1~2um, and the thickness of the third glue layer is 1~2um.

6. The microwave bag with increased hiding power according to claim 5, characterized in that: It also includes a printing ink layer, which is arranged on the printed aluminum oxide PET film, and the printing ink layer is located between the printed aluminum oxide PET film and the first glue layer, and the thickness of the printing ink layer is 1~1.5um.

7. The microwave bag with increased hiding power according to claim 4, characterized in that: The thickness of the printed alumina PET film is 12 μm.

8. The microwave bag with increased hiding power according to claim 4, characterized in that: The thickness of the milky white PET composite film is 15 μm.

9. The microwave bag with increased hiding power according to claim 4, characterized in that: The thickness of the nylon membrane is 15 μm.

10. The microwave bag with increased hiding power according to claim 4, characterized in that: The thickness of the polypropylene film is 70 μm.

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