How does Apple Protection Bag significantly improve the smoothness of apple fruit surface, reduce defects and make the fruit appearance more beautiful?

Apple protection bags are made of various materials, and different materials play their own unique roles in improving the smoothness of fruit surface. Among the common paper bag materials, high-quality wood pulp paper bags are specially treated and have good light-shielding properties. During the growth of apples, light-shielding properties prevent strong light from directly hitting the fruit, reducing the damage to the fruit skin and abnormal pigment precipitation caused by excessive light. In the young fruit stage of apples, the light-shielding effect can effectively inhibit the excessive formation of chlorophyll in the fruit skin, making the fruit skin base color purer, laying the foundation for a smooth and beautiful appearance in the later stage. The wax layer on the surface of waxed paper bags not only enhances the moisture-proof and waterproof performance of the paper bags, but also forms a buffer layer between the fruit and the paper bags. During the growth of the fruit, the shaking of branches, wind and rain may cause friction between the fruit and the paper bag. The presence of the wax layer can effectively reduce the scratches and damage caused by this friction on the fruit surface, thereby keeping the fruit surface smooth. ​
Apple protection bags made of plastic bags also contribute to improving the appearance of apples. Ordinary plastic bags are excellent in waterproofness and can prevent rain from directly washing the surface of the fruit. Rainwater may carry impurities such as dust and germs in the air. If it directly contacts the fruit, it is easy to leave stains on the fruit surface, or even cause diseases, resulting in spots on the fruit surface. The protection of plastic bags allows the fruit to grow in a relatively clean environment. On this basis, functional plastic bags achieve better results by adding special materials. For example, plastic bags with breathable materials can adjust the temperature and humidity in the bag while ensuring waterproofness, avoiding the breeding of mold due to excessive humidity in the bag, which affects the smoothness of the fruit surface; plastic bags with UV protection can block the damage of ultraviolet rays to the fruit, and prevent defects such as sunburn on the fruit surface due to ultraviolet radiation. ​
Apple protection bags made of new materials are also constantly helping to improve the appearance of apples. Degradable material fruit bags, while having protective properties, will not cause pollution or damage to the fruit surface due to material problems. Its degradable characteristics in the natural environment are also in line with the concept of environmental protection, avoiding the impact of waste that may be left behind by traditional materials on the orchard environment, indirectly ensuring the cleanliness of the apple growth environment, and helping to keep the fruit surface smooth. Composite material fruit bags combine the advantages of multiple materials, such as combining materials with good air permeability with materials with strong waterproofness, which can not only ensure air circulation in the bag, so that the fruit can breathe smoothly, but also prevent external moisture and impurities from entering, creating a suitable growth space for the fruit and reducing the possibility of fruit surface defects. ​
In addition to the material, the production process of apple protection bags is also closely related to the appearance quality of the fruit. When making paper bags, the selection and processing of paper is very important. Select paper with high strength and good toughness, and perform sizing, coating and other treatments to enhance the physical properties of the paper. During the wax coating process, the melted wax is evenly coated on the surface of the paper to ensure that the wax layer is thin and uniform, and does not affect other properties of the paper bag while giving full play to its protective role. In the paper bag forming stage, precise size cutting and tight bonding process ensure the quality of the bag. The ventilation and drainage holes set at the bottom of the bag and the operation port design of the bag mouth are designed to ensure that the fruit bag can ensure air circulation and moisture discharge during use, prevent the poor environment in the bag from affecting the fruit, and facilitate the operation of fruit farmers, ensure that the fruit bag can fit the fruit tightly, and reduce the interference of external factors on the fruit surface.​
The production process of plastic bags also pays attention to details. When processing plastic raw materials, additives are added according to different needs. For example, antistatic agents can prevent plastic bags from generating static electricity to absorb dust and affect the cleanliness of the fruit surface; antioxidants can extend the service life of plastic bags and ensure that they continue to play a protective role during the apple growth cycle. During the plastic bag molding process, the temperature, pressure and time of heat sealing are strictly controlled to ensure that the seal is firm and well sealed to prevent external impurities from entering. Reasonable design of the bag mouth closing method makes it convenient for fruit farmers to put apples into the bag and fix them, so that the plastic bag can stably protect the fruit and reduce the adverse effects on the fruit surface caused by shaking and other reasons. ​
From the different stages of apple growth, the role of protective bags in improving the smoothness of the fruit surface runs through. In the young fruit stage, apple fruits are fragile and easily damaged by pests and diseases and external environmental factors. Apple protective bags isolate the fruit from the outside world and effectively block the invasion of pathogens and pests. The invasion of pests and diseases often leaves scars and spots on the fruit surface, and the protection of protective bags avoids these situations. The protective bag can also adjust the microenvironment for young fruits, block the sun in the hot summer to reduce the temperature in the bag, and play a certain role in heat preservation in the cold season, keeping the temperature and humidity in the bag stable. Unsuitable temperature and humidity may cause abnormal growth of fruit epidermal cells, roughness, cracks and other problems. A stable microenvironment is conducive to the normal growth of fruit epidermal cells, creating conditions for the formation of a smooth fruit surface. ​
During the fruit expansion period, the apple protective bag continues to play a role. As the fruit volume increases, the swing of branches and daily management operations in the orchard may cause mechanical damage to the fruit. The protective bag is like a soft barrier for the fruit, buffering the collision and friction between external objects and the fruit, and preventing scratches, dents and other defects on the fruit surface. In addition, bagging helps fruit farmers to reasonably control the number of flowers and fruits and ensure that nutrients are fully supplied to the fruit. Adequate and balanced nutrient supply enables the fruit epidermal cells to grow healthily and arrange more closely and neatly, thereby improving the smoothness of the fruit surface. ​
At maturity, the effect of apple protective bags on improving the appearance of the fruit is particularly obvious. For red varieties of apples, the shading effect of the protective bag reduces the formation of chlorophyll during the young fruit stage. When the fruit is close to maturity, after removing the protective bag, the anthocyanin in the peel increases rapidly under ultraviolet irradiation, and the fruit can be quickly and evenly colored, showing a bright and attractive red. Without the light shielding of the protective bag, the fruit may be exposed to sunlight too early, and the chlorophyll cannot be effectively reduced, resulting in uneven coloring, the appearance of mottled fruit, etc., affecting the appearance. At the same time, during the entire growth process, the protective bag prevents the fruit from being contaminated by external impurities such as dust and bird droppings, reduces the occurrence of fruit rust, keeps the fruit surface smooth at all times, and enters the market with the best appearance.