Preparation method of fresh-keeping bag

Abstract

The invention discloses a preparation method of a fresh-keeping bag. The method comprises the following steps of: preparing a plastic film of which the thickness is 0.05 mm into the fresh-keeping bag, wherein the size of the fresh-keeping bag can be determined by the amount of stored products; and inlaying a silicon window on the bag body of the fresh-keeping bag, wherein the silicon window is directly adhered to the bag body at the temperature of between 105 and 110 DEG C and under the pressure of 75 kPa, the adhering time is 1 second, and the area of the silicon window can be calculated according to the air permeability, the respiration intensity of fruits and the filling amount of the fruits and vegetables. The preparation method has the advantages that the method is convenient to operate, the fresh-keeping bag prepared by the method can inhibit the respiration intensity of the fruits and the vegetables, reduce the activity of internal enzymes of the fruits, keep the freshness of the vegetables and the fruits, and simultaneously can reduce the gas releasing times, thereby being capable of reducing energy consumption and bag damages during operation, reducing the cost, and ensuring the quality of the stored products.

Description

technical field [0001] The invention relates to a method for preparing a packaging material, in particular to a method for preparing a fresh-keeping bag. Background technique [0002] Fresh-keeping film and fresh-keeping bags are commonly used plastic packaging products for fresh-keeping foods. Now many families cannot do without them. People seem to think that food is safe and reliable if they are used. Fresh-keeping bags themselves are difficult to reassure, such as polyvinyl chloride, referred to as PVC, this material can also be used in food packaging, but it has a certain impact on the safety of the human body, PVC plastic wrap contains carcinogenic substances, which are harmful to the human body Larger; although polypropylene plastic wrap and polyethylene plastic wrap are non-toxic, they are made of a single material through the process of fixing the length, cutting, and heat-sealing the bottom of the bag. The time is short, during the fruit and vegetable storage peri...

AI Technical Summary

Problems solved by technology

[0002] Fresh-keeping film and fresh-keeping bags are commonly used plastic packaging products for fresh-keeping foods. Now many families cannot do without them. People seem to think that food is safe and reliable if they are used. Fresh-keeping bags themselves are difficult to reassure, such as polyvinyl chloride, referred to as PVC, this material can also be used in food packaging, but it has a certain impact on the safety of the human body, PVC plastic wrap contains carcinogenic substances, which are harmful to the human body Larger; although polypropylene plastic wrap and polyethylene plastic wrap are non-toxic, they are made of a single material through the process of fixing the length, cutting, and heat-sealing the bottom of the bag. The time is short, during the storage period of fruits and vegetables, the bags should be opened regularly for ventilation, which will inevitably increase the labor intensity, and the quality of fruits and vegetables cannot be guaranteed