CN204433306U - A kind of heat sealing packaging bag - Google Patents

Abstract

The utility model relates to a heat-sealed packaging bag, which comprises: an outer bag and an inner bag, wherein the inner bag is placed inside the outer bag, and the outer bag and the inner bag are heat-sealed or sewn together after being folded inward at the ring edge of the mouth , the inner bag is provided with several air holes. The utility model can automatically discharge the unemptied air in the bag when the internal pressure increases during the stacking or handling operations after the packaging bag is heat-sealed by opening several air holes on the inner bag. It can be kept relatively isolated from the outside world when it is pressed, so that the outside air cannot communicate with the inside of the bag in a large amount, thereby preventing the product in the bag from being in contact with the outside air in a large area and causing moisture absorption and deterioration, and basically does not increase the manufacturing cost of the packaging bag, which is conducive to automatic packaging. Promotion and application of packaging equipment.

Description

A heat-sealed packaging bag

technical field

The utility model belongs to the field of packaging bags, in particular to a heat-sealed packaging bag that can better meet the requirements of automatic packaging work.

Background technique

With the advancement of science and technology and the increasing shortage of social labor force, people have increasingly adopted fully automatic packaging equipment including automatic bagging, automatic weighing, and automatic sealing in the packaging operations of bagged products such as sugar and chemical fertilizers. Instead of manual packaging operations. At present, the packaging bag that can meet the requirements of automatic packaging equipment is that the inner bag and the outer bag are heat-sealed or sewn together at the mouth of the bag, and in order to avoid excessive air leakage after the packaging bag is sealed, the packaging product will be moisture-absorbed and agglomerated or Deterioration, the sealing of the packaging bag usually adopts the sealing process of heat sealing and sewing, that is, the inner bag is completely sealed by heat sealing, and then the outer bag is sewn together with the inner bag by sewing above the heat sealing line, so as to avoid air leakage and ensure the strength of the suture. However, since the air in the packaging bag cannot be completely emptied before the automatic packaging equipment heat seals it, the internal pressure of the packaging bag will increase due to extrusion during stacking or handling operations after the sealing is completed, and the air that has not been evacuated is often The inner bag of the packaging bag will swell and break at the bottom and the heat seal of the mouth, causing the packaging bag to leak, so that a large area of the product in the packaging bag is in contact with the air to absorb moisture and deteriorate. It is precisely because of the above problems that automatic packaging equipment has been difficult to be popularized and applied in the packaging of moisture-absorbing products such as sugar and fertilizers, resulting in the consumption of a large amount of social labor, affecting the improvement of economic benefits of enterprises, and restricting the development of enterprises.

In order to solve this problem, the invention title proposed by the applicant: a packaging bag (Application No.: 201410208094.1) in the invention patent proposes the following technical solution: a separation belt is provided for the inner bag of the packaging bag, and the separation belt is set On the inner side of the mouth of the packaging bag body, when the packaging bag is heat-sealed, it can prevent the inner surface of the packaging bag body from being completely adhered and sealed, and a gap that can be ventilated outward is reserved on the heat-sealed sealing line. This technical solution solves the above problems well, but it also causes the manufacturing cost of the packaging bag to rise, brings a certain cost increase to the use link, and forms a certain obstacle to popularization.

Therefore, there is a need for a heat-sealed packaging bag that can not only meet the requirements of automatic packaging equipment, but also enable the unevacuated air in the bag to be automatically discharged when the internal pressure increases during stacking or handling operations after the sealing is completed. At normal pressure, it can be kept relatively isolated from the outside world, so that the outside air can communicate with the inside of the bag very little, preventing moisture absorption and deterioration of the items in the bag, and basically does not increase the production cost of the use link. But do not find yet the packaging bag that can satisfy above-mentioned requirement at present.

Contents of the invention

The purpose of the utility model is to solve the defects and deficiencies of the existing packaging bags, and provide a heat-sealed packaging bag more suitable for automatic packaging operations.

The purpose of this utility model and its technical solution are to adopt the following technical solutions to achieve. According to the utility model, a heat-sealing packaging bag is proposed, which includes: an outer bag and an inner bag, the inner bag is set in the outer bag, and the outer bag and the inner bag are in the ring edge of the mouth After being folded, they are heat-sealed or sewn together, and several ventilation holes are opened on the inner bag.

The purpose of the utility model and the solution to its technical problems can also be further realized by adopting the following technical measures.

In the heat-sealed packaging bag mentioned above, there are 1 to 50 air holes with a diameter of 0.1 to 1 mm, which are set within the range of 150 mm below the sealing line of the bag mouth.

The aforementioned heat-sealing packaging bag, wherein the inner bag is a plastic film bag.

The aforementioned heat-sealed packaging bag, wherein the outer bag is a plastic woven bag, a plastic-coated bag or a paper bag, and the plastic-coated bag or paper bag is provided with ventilation holes.

The aforementioned heat-sealed packaging bag, wherein the length and width of the inner bag are both 5-50 mm larger than the length and width of the outer bag, and the inner bag and the outer bag are not connected at the bottom.

Compared with the prior art, the utility model has obvious advantages and beneficial effects. By virtue of the above-mentioned technical scheme, a heat-sealed packaging bag of the utility model has at least the following advantages and beneficial effects: the heat-sealed packaging bag of the utility model can not only adapt to the operation requirements of automatic packaging equipment, but also can be weighed and bagged After heat sealing, the air in the bag that has not been evacuated is automatically discharged when the internal pressure increases due to extrusion during stacking or handling operations, and it can be kept relatively isolated from the outside world at normal pressure, so that the outside air cannot be separated from the inside of the bag. A large number of exchanges are carried out to prevent the products in the bag from being in contact with the outside air in a large area, which will cause moisture absorption and deterioration. Automatic packaging equipment can be popularized and applied in the packaging of moisture-prone products such as sugar and fertilizers, which greatly improves the efficiency and quality of operations, and at the same time liberates a large amount of labor for the society, effectively improving the economic benefits of enterprises.

The above description is only an overview of the technical solutions of the present utility model. In order to better understand the technical means of the present utility model, it can be implemented according to the contents of the description, and in order to make the above-mentioned and other purposes, features and advantages of the present utility model better It is obvious and easy to understand. The preferred embodiments are specifically cited below, together with the accompanying drawings, and the detailed description is as follows.

Description of drawings

Fig. 1 is a structural schematic diagram of a preferred embodiment of a heat-sealing packaging bag of the present invention.

1: Outer bag 2: Inner bag

3: Pocket hemming hot pressing line 4: Ventilation hole

Detailed ways

In order to further explain the technical means and effects of the utility model to achieve the intended purpose of the invention, the specific implementation, structure, Features and their functions are described in detail below.

Please refer to FIG. 1 , which is a structural schematic view of a preferred embodiment of a heat-sealing packaging bag of the present invention. The heat-sealed packaging bag of the utility model is mainly composed of an outer bag 1 and an inner bag 2, the inner bag 2 is set in the outer bag 1, and several air holes 4 are opened on the inner bag 2, for convenience and adapting to automatic packaging equipment Automatic bag loading and bag opening operations, outer bag 1 and inner bag 2 are heat-sealed or sewn together after being folded inward at the ring edge of the mouth. Among them, the ventilation holes 4 can be flexibly selected in the range of 1 to 50 in number and 0.1 to 1 mm in diameter according to the size of the packaging bag and the required amount of gas to be discharged, and these ventilation holes 4 are opened 150 mm below the sealing line of the bag mouth In the range.

In order to make the inner bag 2 not easy to be broken when the heat-sealed packaging bag is packaged, the length and width of the inner bag 2 are respectively greater than the length and width of the outer bag 1 by 5-50 mm during the production of the packaging bag. In order to reduce the manufacturing difficulty and further control the manufacturing cost of the packaging bag, the inner bag 2 and the outer bag 1 of the heat-sealed packaging bag of the present utility model may not be connected at the bottom.

In a preferred embodiment of the present utility model, when making the inner bag 2, 10 to 20 air holes 4 with a diameter of 0.5 mm are pricked out with a needle, and the outer bag 1 is stitched together at the bottom hem, and heat-sealed. When the sealed packaging bag is made, the mouth of the outer bag 1 and the inner bag 2 is folded inwards to form a ring edge of about 20 mm, and the ring edge is hot-pressed by a hot-pressing device to form a bag mouth folding hot-pressing line 3, and the outer bag 1 Adhere (heat seal) together with the inner bag 2 at the mouth of the bag, or use sewing equipment to sew the ring edge together, so that the outer bag 1 and the inner bag 2 are connected (sewn) together at the mouth of the bag, wherein the inner bag The length and width of 2 are respectively greater than the length and width of outer bag 1 by 20mm.

The outer bag 1 of the utility model is a plastic woven bag, and the inner bag 2 is a plastic film bag. At the same time, the outer bag 1 can be replaced with a plastic film bag or a paper bag according to market demand and different needs of packaging products, wherein the plastic Appropriate ventilation holes can be provided on the film-coated bag or paper bag.

The above are only preferred embodiments of the utility model, and are not intended to limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any Those who are familiar with this profession, without departing from the scope of the technical solution of the present utility model, may use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all the technical solutions of the utility model do not depart from the scope of the utility model. Contents, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model still belong to the scope of the technical solution of the utility model.

Claims (5)

1. A heat-sealing packaging bag, comprising: an outer bag and an inner bag, the inner bag is placed inside the outer bag, and the outer bag and the inner bag are heat-sealed or Sewn together, it is characterized in that: several ventilation holes are opened on the inner bag. 2. The heat-sealed packaging bag according to claim 1, characterized in that: there are 1 to 50 air holes with a diameter of 0.1 to 1 mm, and they are opened within the range of 150 mm below the sealing line of the bag mouth. 3. The heat-sealing packaging bag according to claim 1, characterized in that: the inner bag is a plastic film bag. 4. The heat-sealing packaging bag according to claim 1, characterized in that: the outer bag is a plastic woven bag, a plastic-coated bag or a paper bag, and the plastic-coated bag or paper bag is provided with ventilation holes. 5. The heat-sealing packaging bag according to claim 1, characterized in that: the length and width of the inner bag are greater than the length and width of the outer bag by 5-50mm, and the inner bag and the outer bag The bottoms are not connected.