Effect of Wood Fruit Bag Composite Paper on Fruit Preservation

1. Material Properties and Preservation Principles
Wood fruit bag composite paper is mainly composed of wood pulp paper and other composite materials (such as polyethylene, breathable film, etc.), and this structure gives it unique properties. The wood pulp paper layer provides good air permeability and certain hygroscopicity, while the composite layer enhances the strength and durability of the bag while maintaining proper moisture retention.
Breathability: The fiber structure of wood pulp paper gives the bag a certain air permeability, which helps maintain the balance of gas inside and outside the bag. For fruits, an appropriate supply of oxygen is necessary because it participates in the respiration of fruits and helps maintain their life activities. Expelling excessive carbon dioxide also helps prevent the accumulation of harmful substances such as alcohol and acetaldehyde produced by anaerobic respiration in fruits.
Moisture retention: The composite layer usually has a certain waterproof property, which can prevent the water in the bag from evaporating too quickly. Maintaining proper humidity is essential for fruit preservation, because water loss can cause the fruit texture to become soft, the taste to deteriorate, and even accelerate the decay process.

2. Specific impact on fruit preservation
Extend shelf life: The air permeability and moisture retention properties of wood fruit bag composite paper work together to create a relatively stable microenvironment for fruits. This environment helps slow down the aging of fruits and prolong their shelf life. Experiments show that the shelf life of fruits packaged in this bag can be extended by several days to weeks compared with traditional packaging materials.
Maintain quality: In addition to extending the shelf life, wood fruit bag composite paper also helps maintain the quality of fruits. Since the gas and humidity in the bag are effectively regulated, the color, taste and nutritional value of the fruit can be better maintained. After some easily oxidized fruits are packaged in this bag, the color change of their flesh will be significantly slowed down.
Reduce loss: During the transportation and storage of fruits, loss is an issue that cannot be ignored. The use of wood fruit bag composite paper can effectively reduce the rotting and deterioration of fruits caused by changes in environmental factors. This not only reduces economic losses, but also helps to improve the overall quality and market competitiveness of fruits.
Environmental advantages: Compared with traditional plastic bags, wood fruit bag composite paper has better environmental performance. It is biodegradable and will not cause long-term pollution to the environment. Because the bag has certain air permeability and moisture retention properties, the use of preservatives can be reduced, further reducing the negative impact on the environment.

3. Practical applications and challenges
Although wood fruit bag composite paper performs well in fruit preservation, it still faces some challenges in practical applications. Different types of fruits have different requirements for packaging materials, which require customized designs for specific fruits. Since the cost of this material is relatively high, how to reduce costs while ensuring the preservation effect is also one of the problems that the industry needs to solve.

In order to overcome these challenges, researchers are constantly exploring new materials and technologies. Reduce costs by improving production processes and optimizing material formulations; use modern analytical techniques to accurately measure the physiological changes of fruits during storage in order to better adjust the performance of packaging materials; and develop packaging materials with intelligent control functions that can automatically adjust the gas and humidity in the bag according to the actual situation of the fruit.