Heat-insulating and fresh-keeping PE packaging bag

Abstract

The utility model discloses a heat-insulating and fresh-keeping PE packaging bag which comprises a bag body, and a sealing strip is arranged at an opening in the top of the bag body. A through hole is formed in one side of the bag body, and a one-way ventilation valve is bonded to the outer side of the through hole through an adhesive; the bag body is sequentially provided with a heat sealing layer, a blocking layer and a heat insulation layer from inside to outside. The heat insulation layer comprises a waterproof insulation layer, a waterproof heat insulation layer and a heat reflection layer which are sequentially arranged from inside to outside. According to the heat-insulating and fresh-keeping PE packaging bag provided by the utility model, fruits and vegetables are filled into the bag body, sealing can be realized through the sealing strip, and the bag body can be vacuumized by utilizing the one-way ventilation valve, so that the oxidation reaction of fresh food and the breeding of bacteria are greatly slowed down; meanwhile, the bag body is provided with the blocking layer, the fresh-keeping effect is good, the freshness and quality of vegetables and fruits are effectively protected, the heat insulation layer is arranged, the anti-static and heat insulation effects are good, external heat radiation and internal heat loss can be prevented, and meanwhile the good waterproof performance is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging bags, in particular to a heat-insulating and fresh-keeping PE packaging bag. Background Art

[0002] With the transformation of my country's economic structure, my country's agricultural structure has also been adjusted accordingly. Among them, the production of fruit and vegetable industry has developed rapidly, and the supply of production areas is sufficient. The output of many fruits and vegetables has gradually changed from insufficient supply to oversupply. In many cities and regions, the storage and transportation process of fruits and vegetables, especially many fresh fruits and vegetables, will rot and deteriorate due to changes in storage and transportation conditions during storage and transportation, causing losses to fruit farmers. However, in the field of fruit and vegetable preservation, ordinary packaging bags cannot play a role in heat insulation and preservation of fruits and vegetables. Especially in summer, due to the high temperature, it is particularly easy to affect its freshness.

[0003] Based on the above situation, the utility model proposes a heat-insulating and fresh-keeping PE packaging bag, which can effectively solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a heat-insulating and fresh-keeping PE packaging bag. The utility model provides a heat-insulating and fresh-keeping PE packaging bag. When fruits and vegetables are put into the bag, the bag can be sealed by a sealing strip, and the bag can be vacuumed by a one-way air-permeable valve, thereby greatly slowing down the oxidation reaction of fresh fruits and the growth of bacteria; at the same time, the bag has a good fresh-keeping effect by setting a barrier layer, effectively protecting the freshness and quality of fruits and vegetables, and has a good anti-static and heat-insulating effect by setting a heat-insulating layer, which can prevent external heat radiation and internal heat loss, and has good waterproof performance.

[0005] The utility model is realized by the following technical solutions:

[0006] A heat-insulating and fresh-keeping PE packaging bag comprises a bag body, wherein a sealing strip is arranged at the top opening of the bag body; a through hole is opened on one side of the bag body, and a one-way air-permeable valve is bonded to the outer side of the through hole by an adhesive; the bag body is provided with a heat-sealing layer, a barrier layer and a heat-insulating layer in sequence from the inside to the outside; the heat-insulating layer comprises a waterproof insulating layer, a waterproof heat-insulating layer and a heat-reflecting layer in sequence from the inside to the outside.

[0007] According to the above technical solution, as a further preferred technical solution of the above technical solution, the heat sealing layer is made of PE material.

[0008] According to the above technical solution, as a further preferred technical solution of the above technical solution, the barrier layer is made of PVDC material.

[0009] According to the above technical solution, as a further preferred technical solution of the above technical solution, the waterproof insulation layer is made of PVC material, the waterproof heat insulation layer is made of aerogel felt, and the heat reflection layer is made of aluminum film.

[0010] According to the above technical solution, as a further preferred technical solution of the above technical solution, the adhesive is acrylic glue.

[0011] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0012] The utility model provides a heat-insulating and fresh-keeping PE packaging bag. When fruits and vegetables are put into the bag, the bag can be sealed by a sealing strip, and a one-way air-permeable valve can be used to draw a vacuum on the bag, thereby greatly slowing down the oxidation reaction of the fresh food and the breeding of bacteria. At the same time, the bag has a good fresh-keeping effect by arranging a barrier layer, and effectively protects the freshness and quality of the fruits and vegetables. By arranging a heat-insulating layer, the anti-static and heat-insulating effects are good, and external heat radiation and internal heat loss can be prevented, and the bag has good waterproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a cross-sectional structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the utility model, the preferred implementation scheme of the utility model is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationship described in the drawings is only used for illustrative purposes and cannot be understood as a limitation on this patent.

[0016] A heat-insulating and fresh-keeping PE packaging bag comprises a bag body 1, wherein a sealing strip 2 is arranged at the top opening of the bag body 1; a through hole 3 is opened on one side of the bag body 1, and a one-way air-permeable valve 4 is bonded to the outer side of the through hole 3 by an adhesive; the bag body 1 is provided with a heat-sealing layer 5, a barrier layer 6 and a heat-insulating layer 7 in sequence from the inside to the outside; the heat-insulating layer 7 comprises a waterproof insulating layer 71, a waterproof heat-insulating layer 72 and a heat-reflecting layer 73 in sequence from the inside to the outside.

[0017] The utility model puts fruits and vegetables into the bag body 1, and can achieve sealing through the sealing strip 2, and can use the one-way air permeable valve 7 to draw a vacuum on the bag body 1, thereby greatly slowing down the oxidation reaction of the fresh food and the breeding of bacteria; at the same time, the bag body 1 is provided with a barrier layer 6, so that the preservation effect is good, and the freshness and quality of the fruits and vegetables are effectively protected; by providing a heat insulation layer 7, the anti-static and heat insulation effects are good, and the external heat radiation and the internal heat loss can be prevented, and at the same time, it has good waterproof performance.

[0018] Furthermore, in another embodiment, the heat sealing layer 5 is made of PE material. By providing the heat sealing layer 5 made of PE material, the heat sealing performance is good.

[0019] Furthermore, in another embodiment, the barrier layer 6 is made of PVDC material. By providing the barrier layer 6 made of PVDC material, the barrier property is high, and the barrier properties such as moisture barrier, oxygen barrier, and moisture-proof are achieved, thereby effectively protecting the freshness and quality of fruits and vegetables.

[0020] Furthermore, in another embodiment, the waterproof insulation layer 71 is made of PVC material, the waterproof heat insulation layer 72 is made of aerogel felt, and the heat reflection layer 73 is made of aluminum film. By providing the waterproof insulation layer 7 made of PVC material, the possibility of static electricity inside the bag body and between the bag body and the outside world can be effectively prevented, and it also has good waterproof performance; by providing the waterproof heat insulation layer 72 made of aerogel felt, the heat insulation effect is good, and it also has good waterproof performance; by providing the heat reflection layer 73 made of aluminum film, it has good heat reflection performance, prevents external heat radiation and internal heat loss, and has good heat insulation effect.

[0021] Furthermore, in another embodiment, the adhesive is acrylic glue. Acrylic glue has good adhesion, low temperature resistance, and strong anti-aging performance, so that the one-way air-permeable valve 4 can be firmly adhered to the bag body 1.

[0022] According to the description and drawings of the utility model, those skilled in the art can easily manufacture or use the heat-insulating and fresh-keeping PE packaging bag of the utility model, and can produce the positive effects recorded in the utility model.

[0023] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0024] Unless otherwise specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A heat-insulating and fresh-keeping PE packaging bag, characterized by: The invention comprises a bag body (1), wherein a sealing strip (2) is arranged at the top opening of the bag body (1); a through hole (3) is opened on one side of the bag body (1), and a one-way air-permeable valve (4) is bonded to the outer side of the through hole (3) by means of an adhesive; the bag body (1) is provided with a heat-sealing layer (5), a barrier layer (6) and a heat-insulating layer (7) in sequence from the inside to the outside; the heat-insulating layer (7) comprises a waterproof insulating layer (71), a waterproof heat-insulating layer (72) and a heat-reflecting layer (73) in sequence from the inside to the outside.

2. The heat-insulating and fresh-keeping PE packaging bag according to claim 1, characterized in that: The heat sealing layer (5) is made of PE material.

3. The heat-insulating and fresh-keeping PE packaging bag according to claim 1, characterized in that: The barrier layer (6) is made of PVDC material.

4. The heat-insulating and fresh-keeping PE packaging bag according to claim 1, characterized in that: The waterproof insulation layer (71) is made of PVC material, the waterproof heat insulation layer (72) is made of aerogel felt, and the heat reflection layer (73) is made of aluminum film.

5. The heat-insulating and fresh-keeping PE packaging bag according to claim 1, characterized in that: The adhesive is acrylic glue.

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