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What are the requirements for packaging technology of food packaging bags?

seemingly inconspicuous packaging bag on the market has its story behind its production, and the production and packaging technology of packaging bags is one of them. Today, I will explain the packaging technology requirements of food packaging bags for you. 1. It is necessary to understand the protective requirements of food The chemical composition and physical and chemical properties of different foods are different, so the protective requirements of different foods on food packaging bags are also different. For example, cakes contain more oil and are soft, and have certain requirements for optimal water content. Therefore, at least the following requirements should be met: oil-proof and high-oxygen resistance (to prevent oil leakage and grease from being oxidized), high moisture resistance ( to prevent the cake from losing moisture and becoming dry and hard). For another example, the packaging of tea should have high oxygen resistance (to prevent the active ingients from being oxidized), high moisture resistance (tea gets moldy and deteriorated when wet), high light resistance (the chlorophyll in tea will change under the action of sunlight), and high resistance to aroma. (The aroma components of tea molecules are easily emitted, and the tea flavor is lost. In addition, tea leaves are also very easy to absorb external odors), and a considerable part of the tea currently on the market is packaged in ordinary PE, PP and other transparent plastic bags, which greatly wastes the effective use of tea leaves. ingients, the quality of tea is not guaranteed. Contrary to the above foods, fruits, vegetables, etc. have respiration options after picking, that is, the packaging is requi to have different permeability to different gases. For example, fried coffee beans will slowly release carbon dioxide after being packaged, and cheese will also generate carbon dioxide after being packaged, so their packaging should be highly oxygen-barrier and carbon dioxide-permeable. The packaging of fruits and vegetables is often requi to be mildew-proof, because the small mist droplets on the inner wall of the packaging bag will cause a series of unfavorable biochemical uses of the fruits and vegetables, resulting in easy browning and perishability of fruits and vegetables. Different varieties of fruits and vegetables and the same kind of fruits and vegetables with different maturity have different requirements on the ventilation and selectivity of packaging materials. The protective requirements for packaging of raw meat, processed meat food, beverages, snacks, and baked goods are also very different. For example, the coating of canned meat should be resistant to sulfur, the coating of canned fruit should be acid-resistant, the container of aerated beverage should be able to withstand a certain pressure, the packaging container of wine should be resistant to alcohol and block aroma, etc. Therefore, the packaging should be scientifically designed according to the different properties of the food itself and the protective requirements of the water. 2. Choose packaging materials with suitable protection function The traditional packaging materials are mainly glass bottles, metal cans, cartons, and cartons. Modern food packaging materials mainly include plastics, paper, composite bags materials (multi-layer composite bags materials of various types such as plastic/plastic, plastic/paper, plastic/aluminum, foil/paper/plastic, etc.). 1. composite bags materials composite bags materials are the most versatile and widely used flexible packaging materials. At present, there are more than 30 kinds of plastics used in food packaging, and there are hunds of multi-layer composite bags materials containing plastics. composite bags materials generally use 2-6 layers, but can reach 10 or more layers for special needs. Using plastic, paper or thin paper machine, aluminum foil and other substrates, scientific and reasonable compounding or lamination compatibility can almost meet the requirements of various food packaging. 2. Plastics There are as many as fifteen or six kinds of plastics used in food packaging in China, such as PE, PP, PS, PET, PA, PVDC, EVA, PVA, EVOH, PVC, ionomer resin, etc. Among them, those with high oxygen resistance include PVA, EVOH, PVDC, PET, PA, etc., those with high moisture resistance include PVDC, PP, PE, etc.; those with high resistance to radiation such as PS aromatic nylon, etc.; those with low temperature resistance such as PE, EVA, POET, PA, etc.; good oil resistance and mechanical properties, such as ionomer resin, PA, PET, etc., which are resistant to high temperature sterilization and low temperature, such as PET, PA, etc. The monomer molecular structure of various plastics is different, the degree of polymerization is different, the type and quantity of additives are different, and the properties are also different. Even the properties of different grades of the same plastic will be different. Therefore, it is necessary to select suitable plastics or a combination of plastics and other materials according to the requirements. Improper selection may cause the quality of food to decline or even lose its edible value. 3. The modern packaging of paper and cardboard mainly uses various processed potatoes (cardboard), composite paper, laminated paper (cardboard), etc., such as polymer material processing paper, wax processing paper, oil processing paper, cellophane, parchment, galvanized paper, etc. Aluminum paper, paper/aluminum foil laminate, etc. In transportation packaging, corrugated cardboard is used the most, and corrugated boxes and pallets almost replace wooden boxes. Honeycomb carton is the latest high strength cardboard container. In addition, it should be noted that aluminized paper, aluminized plastic and paper/aluminum foil laminates, and plastic/aluminum foil laminates have different internal structures, properties, costs, etc., and should be properly selected according to different protection requirements and cost requirements. . 3. Adopt advanced packaging technology methods In order to extend the shelf life of food, new packaging technologies that are continuously developed are adopted, such as active packaging, anti-mold packaging, moisture-proof packaging, anti-fog packaging, anti-static packaging, selective breathable packaging, non-slip packaging, buffering Packaging, etc. These new technologies are widely used in developed countries, but they are not widely used in China, and some methods are still blank. The application of these advanced technologies can significantly improve the protection function of packaging. 4. Selection of packaging machinery and equipment supporting food processing technology In order to meet the needs of food processing technology, a variety of new packaging equipment has been developed, such as vacuum packaging machines, vacuum inflatable packaging machines, heat shrink packaging machines, blister packaging machines, Body packaging machine, sheet thermoforming equipment, liquid filling machine, forming/filling/sealing packaging machine, complete set of aseptic packaging equipment, etc. According to the selected packaging materials and packaging process methods, the selection or design of packaging machinery matched with food processing technology and production capacity is the guarantee of successful packaging. 5. Packaging and decoration design and brand awareness of packaging design Packaging and decoration design should conform to the hobbies and habits of consumers and consumers in exporting countries. The pattern design is best coordinated with the interior. The trademark should be in an obvious position, and the text description should meet the food requirements. Product descriptions should be truthful. Trademarks should be catchy, easy to understand, easy to spread, and can play a role in widespread publicity. The packaging design of brand-name products should have brand awareness. Some product packaging can be easily replaced, which affects sales. For example, China’s Lao Liujo vinegar has a good reputation in Japan and Southeast Asia. The packaging is suspect. Therefore, a product should be scientifically packaged and cannot be easily changed. Packaging bags have become a part of our lives, so I will interpret the packaging technology requirements of food bags for you, and I hope everyone can have a clear understanding. Vacuum packaging bags, tea packaging bags

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