Plastic bags for food packaging are designed to protect food from contamination, moisture, oxygen, light, and physical damage. They must also meet strict food safety rules. There are many types of plastic bags for food packaging. They differ by material, barrier level, closure, and application. The global flexible food packaging market continues to grow. The broader flexible plastic packaging market was valued at about USD 55.74 billion in 2024 and is projected to reach USD 76.63 billion by 2030. Shenlong Packaging Products Co., Ltd. is a China based exporter of plastic bags for food packaging. The company has more than 20 years of experience in custom packaging and OEM production. It serves food, daily chemical, personal care, and household product clients.
Food packaging bags must balance protection, cost, and convenience. They must also comply with food contact regulations. This article explains the main types of plastic bags for food packaging and the data that supports their use.
Food packaging bags must be made from food grade materials. In the United States, food contact materials must comply with FDA 21 CFR 177.1350 and 21 CFR 177.1520 for polyethylene. In Europe, they must comply with EU 10 2011. Migration testing is required to ensure that substances from the packaging do not transfer to food in unsafe amounts. Food grade inks must be used for printing. Solvent retention must be controlled. Packaging facilities should follow good manufacturing practices. HACCP and ISO 22000 systems are common in food packaging production. Traceability is also important. Buyers should request food contact certificates and migration test reports.
Low density polyethylene is widely used for food packaging bags. It offers good clarity, flexibility, and sealability. Haze values usually range from 8 percent to 15 percent. Tensile strength is about 1,500 to 2,500 psi. Elongation is often above 500 percent. Low density polyethylene bags with 33 micron thickness can withstand temperatures from minus 10 degrees Celsius to 100 degrees Celsius. They are compliant with FDA 21 CFR 177.1520. They are used for produce, bakery, and general food packaging.
Linear low density polyethylene provides higher strength and puncture resistance. Tensile strength ranges from 4,179 to 4,960 psi in the machine direction and 3,479 to 3,744 psi in the transverse direction. Puncture resistance ranges from 195 to 540 grams. Elongation ranges from 507 percent to 723 percent in the machine direction and 611 percent to 731 percent in the transverse direction. Elmendorf tear values range from 269 to 1,508 grams in the machine direction and 865 to 2,094 grams in the transverse direction. Linear low density polyethylene is used for frozen food, meat, and shipping bags.
High density polyethylene offers higher stiffness and moisture barrier properties. It is used for cereal liners, snack bags, and grocery bags. Polypropylene provides high clarity and heat resistance. Biaxially oriented polypropylene is used for snack food packaging. Polyethylene terephthalate provides high clarity and strength. It is used for premium food packaging. Polyamide provides high puncture resistance and oxygen barrier. Ethylene vinyl alcohol provides excellent oxygen barrier. It is used in multilayer food packaging. Compostable materials such as polylactic acid and polybutylene adipate terephthalate are used for food packaging where composting is available.
Produce bags are used for fruits and vegetables. They are often perforated to allow airflow. They may be made from low density polyethylene or linear low density polyethylene. Bakery bags are used for bread, rolls, and pastries. They offer high clarity and grease resistance. Snack bags are used for chips, nuts, and dried fruit. They often use multilayer structures with high moisture and oxygen barrier. Frozen food bags are designed for low temperatures. They maintain flexibility at minus 10 degrees Celsius or lower. Meat and poultry bags require oxygen barrier and strength. Vacuum bags are used for meat, cheese, and fish. They hold a tight seal around the product.
Cheese and deli bags often use peel and reseal closures. Coffee bags use one way valves to release carbon dioxide while blocking oxygen. Tea bags use filter material. Retort pouches are heat resistant and used for ready to eat meals. Takeout and delivery bags are used for restaurant food. Ice bags are used for packaged ice. Milk and liquid bags are used for dairy products. Candy bags, dried fruit bags, nut bags, powder bags, and spice bags are also common. Pet food bags are used for dry and wet pet food. Baby food pouches are used for purees and liquids.
Single layer bags provide basic protection. They are used for short shelf life products. Multilayer bags combine different polymers. Each layer adds a specific property. High barrier bags include ethylene vinyl alcohol or polyvinylidene chloride. They provide low oxygen transmission. Modified atmosphere packaging uses a specific gas mixture to extend shelf life. Vacuum packaging removes air from the package. Oxygen scavengers absorb residual oxygen. Moisture barrier bags use high density polyethylene or multilayer structures. Light barrier bags use opaque or metallized films.
Open top bags are sealed by the packer. Zipper bags have a press to close or slider closure. Slider zippers are easier to use. Peel and reseal bags use a pressure sensitive adhesive. Twist tie bags use a wire or plastic tie. Wicketed bags are used on automated lines. Valve bags are used for coffee. Each closure type offers different convenience and cost.
Thickness is a key specification. Common food packaging bag thicknesses range from 0.8 mil to 4.0 mil. Thicker films provide higher strength and barrier protection. Tensile strength is measured by ASTM D 882. Tear resistance is measured by ASTM D 1922. Puncture resistance is measured by ASTM D 1709. Seal strength is measured by ASTM F 88. Drop testing and leak testing are also common.
Oxygen transmission rate for polyethylene films ranges from 110 to 389 cubic centimeters per 100 square inches per day. Moisture vapor transmission rate ranges from 0.214 to 0.719 grams per 100 square inches per day. Multilayer structures can achieve much lower values. For example, ethylene vinyl alcohol layers can reduce oxygen transmission to below 1 cubic centimeter per 100 square inches per day. Temperature resistance depends on the material. Low density polyethylene bags can withstand minus 10 degrees Celsius to 100 degrees Celsius. Retort pouches can withstand temperatures above 120 degrees Celsius.
Blown film extrusion is common for food packaging bags. It provides balanced strength and good puncture resistance. Cast film extrusion provides high clarity and uniform thickness. Coextrusion combines multiple layers in one step. Lamination bonds pre formed films together. Printing is done by flexographic or rotogravure methods. Food grade inks are used. Solvent retention must be controlled. Bag making includes heat sealing, cutting, and closure attachment. Quality control includes thickness measurement, seal strength testing, and visual inspection.
Food packaging bags must meet food contact regulations. Migration testing is required. Sensory testing is used to check for odor and taste transfer. Seal integrity testing is used to check for leaks. Traceability systems are used to track materials and production lots. HACCP and ISO 22000 systems are common. Buyers should request food contact certificates and test reports. Shenlong Packaging Products Co., Ltd. produces food packaging bags that meet these requirements.
Produce packaging uses perforated bags for fruits and vegetables. Bakery packaging uses high clarity bags for bread and pastries. Snack packaging uses high barrier bags for chips and nuts. Frozen food packaging uses low temperature bags. Meat and poultry packaging uses vacuum bags and barrier bags. Cheese and deli packaging uses peel and reseal bags. Coffee packaging uses valve bags. Tea packaging uses filter bags. Retort packaging uses heat resistant pouches. Takeout packaging uses delivery bags. Ice packaging uses ice bags. Dairy packaging uses milk and liquid bags. Candy packaging uses printed bags. Dried fruit and nut packaging uses barrier bags. Powder and spice packaging uses moisture barrier bags. Pet food packaging uses strong multilayer bags. Baby food packaging uses spouted pouches.
Food packaging bags are under pressure to become more sustainable. Mono material polyethylene structures are easier to recycle. Polypropylene structures are also recyclable in some systems. Compostable materials are used where composting infrastructure exists. Recycled content is increasingly used. However, food contact rules may limit the use of recycled content in direct food contact. Extended producer responsibility laws are driving change. Brands are asking for recyclable and reusable packaging. The industry is investing in mono material structures, compostable laminates, and recycled content.
The flexible food packaging market continues to grow. The global polybags market is expected to grow at 7.7 percent per year from 2025 to 2035. The Asia Pacific region is the fastest growing market. It is expected to grow from USD 8.4 billion in 2025 to USD 19.5 billion in 2035. The United States polybags market was valued at USD 5.9 billion in 2025. The United States converted flexible packaging market is forecast to grow from USD 25.3 billion in 2024 to USD 29.2 billion in 2029. Growth is driven by ecommerce, urbanization, food packaging, and retail development.
There are many types of plastic bags for food packaging. They differ by material, function, barrier level, and closure. Low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, polyethylene terephthalate, polyamide, and ethylene vinyl alcohol are common materials. Produce bags, bakery bags, snack bags, frozen food bags, meat bags, cheese bags, coffee bags, and retort pouches are common types. Each type offers different performance properties. Shenlong Packaging Products Co., Ltd. exports plastic bags for food packaging from China. With more than 20 years of experience, the company provides custom and OEM packaging solutions for global food buyers.
