CN201065211Y - High gas tightness composite packing bag - Google Patents

Abstract

The utility model discloses a high-airtight composite packaging bag, which includes an inner layer body and an outer layer body wrapped outside the inner layer body, and the edge body formed by bonding the inner and outer layer bodies together with glue, The inner layer body is processed from a polyester film with good airtightness; and the outer layer body is processed from a polyethylene film with good heat sealing performance. Because the inner layer body is processed from a polyester film with good airtightness, and the outer layer body is processed from a polyethylene film with good heat sealing performance, when the high When various foods, medicines and chemicals with solvents are contained in the airtight packaging bag, because the polyester film has good airtight performance, it prevents the solvent contained in the material from penetrating into the inner layer , and then dissolve the glue arranged between the inner and outer layers, so as to avoid the deterioration of the items packed inside the high airtight composite packaging bag due to long use time.

Description

High airtight composite packaging bag

【Technical field】

The utility model relates to a high airtight composite packaging bag.

【Background technique】

Various packaging bags are sold on the existing market, such as polyethylene packaging bags and composite plastic packaging bags. The polyethylene packaging bag has limited its scope of use because of its poor airtightness. The composite plastic bag makes up for the shortage of polyethylene packaging bags due to the good air tightness of the outer material. The composite plastic packaging bag is composed of an inner layer body and an outer layer body wrapped outside the inner layer body, the inner layer body and the outer layer body are integrally formed with each other, and the inner and outer layer bodies are mutually formed The edge layer body wrap is placed on the outer edge of the outer layer. The inner layer body is made of polyethylene film with good heat-sealing properties for easy heat sealing, while the outer layer body is made of polyester film with good airtightness for easy sealing. The components in the barrier packaging bag penetrate outward and the components such as air outside the packaging bag penetrate into the bag. When the solvent-containing material is packed into the plastic packaging bag, the solvent in the material easily penetrates the inner layer to dissolve the glue in the middle, but cannot penetrate the outer layer. If it is used for a long time, the solvent will accumulate in the interlayer, which will cause the packaged materials to deteriorate easily.

【Content of utility model】

In order to solve the technical problems of the above-mentioned prior art, the utility model provides a high airtight composite packaging bag which can avoid deterioration of the materials packed inside the packaging bag due to excessive use time.

In order to achieve the above purpose, the utility model provides a high airtight composite packaging bag, which includes an inner layer body and an outer layer body wrapped outside the inner layer body, and the inner and outer layer bodies are bonded together by glue. In the edge body formed, the inner layer body is processed from a polyester film with good airtightness; and the outer layer body is processed from a polyethylene film with good heat sealing performance.

According to the main technical features above, the edge body between the inner layer body and the outer layer body is arranged inside the inner layer body.

Beneficial technical effects of the utility model: because the inner layer body is processed by polyester film with good airtightness, and the outer layer body is processed by polyethylene film with good heat sealing performance Formed, when the high airtight composite packaging bag contains various food, medicine and chemicals with solvents, because the polyester film has good airtight performance, it prevents the The solvent of the material penetrates into the inner layer, and then dissolves the glue between the inner and outer layers, so as to avoid the deterioration of the items packed in the high air-tight composite packaging bag due to long use time.

In order to have a further understanding of the purpose, structural features and functions of the utility model, the detailed description is as follows in conjunction with the accompanying drawings:

【Description of drawings】

Fig. 1 is a schematic diagram of a high airtight composite packaging bag in an embodiment of the present invention;

Fig. 2 is a schematic cross-sectional view of A-A.

【Detailed ways】

Please refer to Fig. 1 and Fig. 2, a kind of high airtight composite packaging bag provided by the utility model is described below in conjunction with an embodiment, which includes an inner layer body 1 and an outer layer wrapped outside the inner layer body 1 body 2, the inner and outer layer bodies 1 and 2 are pasted together by glue 3, and the edge body 4 formed on its periphery, the inner layer body 1 is made of a polyester film with good airtightness processed; and the outer layer body 2 is processed from a polyethylene film with good heat-sealing properties. The edge body between the inner layer body 1 and the outer layer body 2 is arranged inside the inner layer body 1 .

In this embodiment, the packaging bag is a bag body in which the inner layer body 1 is a polyester film and the outer layer body 2 is a polyethylene film. Because polyester film has good chemical stability, high strength; high applicable temperature, for example: minus 30 degrees to plus 150 degrees; high transparency, for example: light transmittance can reach more than 90%; it also has high air tightness, It has good oil resistance, fragrance retention, sanitation and reliability; it has strong acid resistance and strong alkali resistance. And because the polyethylene film has good chemical stability, it can withstand strong acid and alkali salt aqueous solution, and also has good air permeability and heat sealability.

In summary, because the inner layer 1 is processed from a polyester film with good airtightness, and the outer layer 2 is processed from a polyethylene film with good heat-sealing performance As a result, when the high-airtight composite packaging bag is filled with various solvent-containing foods, medicines and chemicals, because the polyester film has good airtight performance, it can prevent the The solvent of the material penetrates into the inner layer body 1, and then dissolves the glue 3 arranged between the inner and outer layer bodies 1 and 2, so as to avoid the deterioration of the items packed in the high airtight composite packaging bag due to long use time phenomenon occurred.

Claims (2)

1. A high-airtight composite packaging bag, which comprises an inner layer body and an outer layer body wrapped around the inner layer body, an edge body formed by bonding one body with glue between the inner layer body, is characterized in that : the inner layer body is processed from a polyester film with good airtightness; and the outer layer body is processed from a polyethylene film with good heat sealing performance. 2. The high airtight composite packaging bag according to claim 1, characterized in that: the edge body between the inner layer body and the outer layer body is arranged inside the inner layer body.

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