PE plastic bags, made from polyethylene, have become one of the most widely used packaging forms in modern society and daily life due to their good chemical stability, excellent processing performance, low cost, and ease of use. Their applications span retail, food, logistics, industry, agriculture, and medical fields, meeting basic protection needs while also allowing for specialized applications in specific scenarios through structural design and functional modification.
In the retail and daily consumer goods sector, PE plastic bags are the most common packaging and carrying tools. Supermarkets and convenience stores commonly use HDPE shopping bags, which, with their moderate rigidity and load-bearing capacity, meet customers' one-time loading needs. Small shops and farmers' markets often use LDPE flat bags or vest bags to package fruits, vegetables, and bulk foods; their softness and transparency facilitate displaying the product's appearance while preventing spillage and contamination. PE bags with closures, such as self-sealing bags and zipper bags, are widely used for storing and displaying small items such as stationery, jewelry, and hardware accessories because they can be repeatedly opened and closed and are moisture-proof and dust-proof.
Food packaging is a significant application area for PE plastic bags. LDPE and LLDPE food storage bags and freezer bags, due to their low-temperature resistance, flexibility, and compliance with food contact safety standards, are used for packaging and refrigerating fresh meat, poultry, fruits, vegetables, and cooked foods, mitigating moisture loss and odor contamination. Bakeries and pastry shops commonly use breathable PE bags to package baked goods, maintaining their softness while preventing surface moisture absorption. In takeout and pre-prepared meal delivery, thickened PE bags combine leak-proof and heat-insulating functions, ensuring the hygiene and quality of food during transportation.
The logistics and warehousing sectors rely on the protective and containerizing functions of PE plastic bags. LLDPE heavy-duty bags and woven fabric composite bags are used as inner packaging for industrial parts, textiles, and chemical raw materials, blocking dust, moisture, and minor mechanical impacts. Antistatic PE bags play a crucial role in the packaging of electronic components, reducing the risk of damage to precision circuits by inhibiting static charge accumulation. Large logistics centers use cylindrical PE bags as outer covers for bulk packaging, simplifying handling processes and reducing costs.
In agriculture and horticulture, PE bags are used for packaging seeds, fertilizers, and pesticides, their chemical resistance protecting them from some acids and alkalis. Seedling pot bags and mulch film coverings help maintain soil moisture and temperature, promoting crop growth. In the medical and hygiene fields, PE bags are used for packaging disposable gloves, masks, and medical supplies, ensuring sterility until use. Medical waste collection bags must meet high strength and leak-proof requirements to ensure safe transport.
With increasing environmental awareness, biodegradable modified PE bags are gradually being used in scenarios where ecological impact needs to be strictly controlled, such as urban waste sorting and collection, and temporary packaging in scenic areas. Overall, the uses of PE plastic bags have evolved from a single packaging function to a systematic solution integrating protection, display, transportation, and preservation, playing an irreplaceable fundamental role in modern economic and social life.