Envelop bag

Abstract

The invention provides an envelop bag which comprises a front board, a back board, a sealing board, a left side board and a right side board. A tear strip, an adhesive area and antitheft lines are formed on the sealing board. The front board and the back board are minitype corrugated boards of a multilayer structure, and waterproof layers are arranged on the surfaces of the minitype corrugated boards. The multilayer minitype corrugated boards are adopted, so that the hardness and stiffness of the envelop bag are improved. It is guaranteed that the envelop bag has the damp and water prevention performance by being coated with the waterproof layers. Double faced adhesive tape which is good in first viscosity, high in holding power and high in peel strength is adopted for sealing, the tear strip is used for splitting, so that enveloping firmness is improved, meanwhile, splitting operation is facilitated, and secondary recycling on the envelop bag is achieved. An antitheft cutter opening which has tearing performance and cannot be restored is added, so that the delivery safety of articles contained in the envelop bag is guaranteed, and the envelop bag has the high market use and promotion value.

Description

technical field [0001] The invention relates to the technical field of packaging, in particular to an envelope bag used for package delivery of letters. Background technique [0002] Most of the envelope bags in the prior art are sealed with a single piece of ordinary paper. During the transportation and express delivery, due to the poor hardness and stiffness of the paper, it is very easy to cause the items in the envelope bag to be folded or crushed. Moreover, the paper is easy to be affected by moisture, and after being exposed to water, various physical performance indicators will drop sharply. When the storage and transportation environment is relatively harsh, the envelope bag is required to have certain functions such as anti-folding, moisture-proof, waterproof and anti-theft, but the envelope bag in the prior art Because it is made of ordinary paper and sealed, it cannot meet these functional requirements, which limits its application in harsh transportation environm...

AI Technical Summary

Problems solved by technology

[0002] Most of the envelope bags in the prior art are sealed with a single piece of ordinary paper. During the transportation and express delivery, due to the poor hardness and stiffness of the paper, it is very easy to cause the items in the envelope bag to be folded or crushed. Moreover, the paper is easy to be affected by moisture, and after being exposed to water, various physical performance indicators will drop sharply. When the storage and transportation environment is relatively harsh, the envelope bag is required to have certain functions such as anti-folding, moisture-proof, waterproof and anti-theft, but the envelope bag in the prior art Because it is made of ordinary paper and sealed, it cannot meet these functional requirements, which limits its application in harsh transportation environments, and the envelope bags in the prior art generally have complicated disassembly operations, and most envelope bags are basically in a complete state after disassembly. In a damaged state, it cannot be used further, and has poor anti-theft performance, which affects the safe delivery of letters

Images