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One-way exhaust valve bag

An exhaust valve and one-way exhaust technology, which is applied in the field of packaging bags, can solve the problems of complex production process and high cost of double-layer bags, and achieve the effects of low cost and simple production process.

Inactive Publication Date: 2011-07-06
王子颖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the manufacturing process of the double-layer bag is complicated and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Will figure 1 Shown cylindrical polyethylene bag body 1, upper end 2, lower end 3, after flattening, valve port 4 is added in bag body. The valve port is a cylindrical self-sealing valve port that has been flattened, with a concave-convex buckle at one end. The feeding self-sealing valve port is located at one end of the bag body, and is glued or welded together with the bag body, and communicates with the storage cavity formed by the bag body and the outside. Its function is to fill the material. When the filling is completed, the material inlet will be closed automatically due to the pressure of the material in the bag. Figure 5 It is a change diagram before and after the filling of the self-sealing valve port 20 is completed. Wherein 19 is the discharge pipe of the filling equipment, which is inserted in the self-sealing valve port 20. After the filling is completed, the internal material 18 presses the self-sealing valve port to make it in a closed state. Of c...

Embodiment 2

[0031] Embodiment 2: as Figure 4The shown double-bottom one-way exhaust type square bottom valve bag includes a cylindrical polyethylene bag body 12, a rectangular bottom surface 13 and a bottom surface 14 formed by folding the bag body, and the bottom surface 14 is provided with a self-sealing valve port 15 for feeding. The folded parts and the adjacent feeding self-sealing ports 15 are bonded or welded to each other to ensure that the receiving chambers formed by 12, 13, 14 and 15 are airtight except for the valve ports. The feed self-sealing valve port is a cylindrical self-sealing valve port that has been flattened, and one end of the self-sealing valve port can be provided with a concave-convex buckle. The role of the feed self-sealing valve port is to fill the material. And when the filling is completed, the feeding port will be closed automatically due to the pressure of the material in the bag. Figure 5 It is a change diagram before and after the filling of the self...

Embodiment 3

[0033] Embodiment 3: It is basically the same as Embodiment 2, the difference is that micro-holes are punched on both bottom surfaces, a one-way exhaust device is provided, and an additional layer is provided.

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Abstract

The invention discloses a one-way exhaust valve bag. The valve bag comprises a bag body and a self-sealing feed valve port, wherein, at least one one-way exhaust device is arranged on the bag body, the one-way exhaust device is a gas passage which is formed by closely fitting at least two films together and then sealing two sides, and adjacent surfaces of the two films are at least partially equipped with heat-resisting materials; the device is connected with the interior and exterior of the bag body, and is bonded or welded with the bag body or / and the bag bottom; and the gas passage in the packaging bag is stuck with air-permeable materials such as sponge and the like. In the invention, when the packaging bag is filled or extruded, gas in an accommodation cavity is quickly exhausted from the gas passage through the air-permeable materials under the action of pressure, and the air-permeable materials prevent leakage of packaged materials during the gas exhaust process; and the gas passage part outside the bag is ordinarily remained in a close fit status owing to attraction between the synthetic resin films and atmospheric pressure action so as to prevent entry of air. By utilizing the bag, the conflict that gas exhaust and moisture protection can not be realized at the same time is solved; and the packaging bag has the advantages of simple process and low cost.

Description

technical field [0001] The invention relates to a packaging bag, in particular to a one-way exhaust valve bag. Background technique [0002] At present, the powder and granular materials that are prone to moisture are mostly packaged in bags with two or more layers of bags. Since the bags are more than two layers, holes can be punched in dislocations between the layers to achieve both exhaust and no air pollution. The purpose of leaking the contents, but there is no balance between its exhaust performance and moisture-proof performance. If the exhaust performance is good, the moisture-proof performance will decrease, and vice versa. As shown in Chinese invention patent application publication CN 101055118A valve pocket. The currently adopted microporous exhaust method has no way to solve the contradiction between exhaust and moisture resistance, and the strength of the bag after microporous drilling is damaged, and there is no waterproof function. In addition, the manufact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D30/24B65D33/01
Inventor 王子颖
Owner 王子颖
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