• Inherent Requirements：
  • Strength Requirement: The package must protect the packaged food from various external forces like pressure, impact, and vibration during storage, stacking, transportation, and handling. Factors related to food packaging strength requirements include transportation methods, stacking forms, and the environment.
  • Barrier Requirements: Barrier property is a crucial aspect of food packaging. Many foods can change in flavor and quality during storage and packaging due to poor barrier properties, which ultimately affects food quality. The substances that need to be blocked include air, water, grease, light, microorganisms, etc.
  • Breathing Requirements: Some exported foods, such as fresh fruits and vegetables, still maintain their breathing function during packaging and storage. Therefore, the packaging materials or containers should be breathable or capable of controlling breathing to achieve the purpose of preservation.
  • Nutritional Requirements: Food gradually loses nutrition during the packaging and storage process, so food packaging should be conducive to the preservation of food nutrition, and it is more desirable to lock nutrition through packaging.
  • Other Requirements: There are many internal requirements for food packaging, such as heat resistance requirements, light protection requirements, shatterproof requirements, and moisturizing requirements.
• External Requirements：
  • Safety Requirements: The safety of food packaging includes health and safety, handling safety, and use safety. Hygiene safety means that food packaging materials should not contain substances harmful to the human body. In terms of packaging technology, the processed foods should be kept as constant as possible in terms of nutrients, color, and taste. Handling safety means that the packaging can guarantee safety during transportation and loading and unloading. The safety of use is to ensure that consumers are not harmed during the opening and eating process.
  • Promotional Requirements: Food packaging is one of the best means of food promotion. The performance, characteristics, consumption methods, nutrients, and cultural connotations of food can be promoted on the packaging. The promotion of food packaging includes necessary information promotion, image promotion, color promotion, structure promotion, etc.
  • Other External Requirements: It also includes convenience requirements, suggestive requirements, interesting description requirements, and emotional description requirements.

How to protect the safety and quality of food in food packaging bags

• Meet Food Safety Quality Requirements: The food company should request the packaging bag production company to use the packaging film that conforms to the national regulations. For example, the information of the composite bag should be green and environmentally friendly. Do not use dry composite plastic packaging containing harmful substances such as benzene, because the solvent is simple to soak the contaminated food.
• Good Flatness: The food packaging bag should be flat, without scratches, burns, bubbles, and wrinkles, and no voids. Flatness is not only a beautiful request but also related to the quality of the food. If the bag is not flat, the food package for high-temperature cooking or low-temperature freezing is simply cracked.
• Use Green Environmental Protection Materials: The QS specification requires that food packaging should not detect benzene solvents that are harmful to human health. However, since benzene solvents are 30% lower than environmentally friendly benzene-free and ketone-free solvents and have good brilliance and color fastness, many of this type of information is also used in the printing of packaging bags, and there are often questions about contaminated food.
• Good Manufacturing Environment: The packaging company that manufactures food bags should pass the production environment to prevent contamination of the food bags during the bag making process.

What are the requirements for plastic bag packaging used in food packaging?

• Non-toxic Safety: Non-toxic safety is the basic requirement for food plastic bag packaging. The quality of plastic is high. Some unscrupulous merchants use inferior plastic. We can not only see that the plastic bag packaging material is relatively rough but also has a pungent smell. Such plastic should be used with caution in bag packaging.
• Good Sealing: Some foods require good airtightness, which can keep the food from expiring. If the airtightness of the food plastic bag is not good enough, some food will leak in vacuum or airtight packaging, which will cause the food to deteriorate rapidly and waste resources.
• Environmental Protection: At present, the country is strictly investigating environmental protection. If the environmental protection standards of food plastic bags cannot meet the standards, the consequences will be more serious. Moreover, the earth is the home of each of us. Only by increasing environmental protection awareness can we protect our common home.
• Sturdy and Practical: In addition to some standards, the most important thing for food plastic bags is to be practical, strong enough, and not easy to be damaged. Otherwise, in the process of transportation and handling, food loss due to poor packaging of plastic bags will only increase a lot of costs.

Requirements for testing food packaging bags

• Composite Film Food Plastic Packaging Bags: The appearance should be flat, without scratches, burns, bubbles, broken oil, or wrinkles, and the heat seal should be flat without false seals. The film should not separate cracks, pores and composite layers. It should be free of impurities, foreign matter and oil stains. Additionally, bagged soaking solutions should be free of odor, odor, turbidity, and discoloration.
• Single-film Food Packaging Bags: The appearance must not have defects such as bubbles, perforations, water lines, exposed ribs, poor plasticization, fish-eye stiffness, etc. Specifications, width, length and thickness deviations should be within the specified range. Physical and mechanical properties include tensile strength and elongation at break, which reflect the tensile ability of the product during use. If this item is not up to standard, food packaging bags can easily break and be damaged during use.
• General Requirements: Plastic packaging bags have very strict requirements for packaging food. They must be non-toxic and harmless, comply with national laws and regulations, and comply with corresponding mandatory standards. But the packaging must have clear signs: trademark, commitment mark, place of origin, address, company name, production date, main ingredients of the product, etc.