A microwave heating exhaust packaging bag

Abstract

A microwave heating exhaust packaging bag, the bag body includes a base material and a polyolefin material with cohesive peeling effect, the polyolefin material with cohesive peeling effect includes a corona layer, a core layer and a heat sealing layer. The heat seal layer is made of 85% polypropylene, 10% polyethylene and 5% vinyl elastomer in mass percent. The microwave heating exhaust packaging bag of the present invention has soft sound when the steam bursts the exhaust port, and has a good consumption experience. 60N, after sterilization at a high temperature of 135°C, the bag will not break; the sealing strength of the exhaust port is different, the exhaust time is controllable, the water is 180g, the same weight of water, 40-60s under the same microwave power conditions; the microwave heating exhaust of the present invention The air packaging bag also has high barrier properties. Combined with alumina films of different barrier grades, the maximum oxygen transmission and water vapor transmission can be within 0.5.

Description

technical field [0001] The invention relates to the field of packaging bags, in particular to a microwave heating exhaust packaging bag. Background technique [0002] The existing microwave exhaust bag implementation methods mainly include the following methods: [0003] (1) Drill holes or lines on the surface of the composite film to make holes or scars on the surface of the film, weaken the strength of the composite film, and release the steam from this weak point when microwave heating; [0004] (2) The steam exhaust port is designed with a special shape at the sealing edge, such as "V" shape, "M" shape, and the position is set at the back seal or the side seal part, by reducing the number of sealing times of the exhaust port or pressure to make the sealing strength of the exhaust port lower than that of other sealing edges, and during microwave heating, the steam is released from the exhaust port, that is, the weak point of the sealing strength; [0005] (3) The double...

AI Technical Summary

Problems solved by technology

[0009] Methods 1, 2 and 6 only allow the steam to be released at the weak point of the strength, resulting in a popping sound when the steam breaks through the exhaust port, causing panic among consumers and poor consumer experience; although method 3 uses easy-to-remove materials to weaken the seal Strength, but this material is additionally added, and an additional unwinding device needs to be installed on the bag-making machine. If the easy-to-remove material is added to the side seal or bottom of the bag, the requirements for the bag-making machine are higher, so it is more It cannot be made into a stand-up pouch; and the sealing strength of the double-sided easy-to-remove material is low, and it can only be cooked at a high temperature of 121°C within 30 minutes, and cannot be cooked at a high temperature of 135°C

Method 4 is a relatively crude treatment method, and it is difficult to control the sealing strength. After the contents are packed and transported, the package is prone to breakage

Method 5, can only be used for frozen packaging or normal temperature packaging, and cannot meet the sterilization requirements of high temperature cooking

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