when were plastic bags invented

Flat Bottom Bag s, also known as square bottom bags, are a modern packaging form, which is named because of its flat bottom and stable shape. This kind of packaging bag combines the advantages of vertical bag and four-sided sealing bag, and has obvious advantages in functionality, appearance design and convenience of use. With its excellent display effect and versatility, flat bottomed bags are widely used in many fields such as food, daily chemical, medicine and industrial products, and become a popular choice in the packaging market. Structural Characteristics of Flat Bottom Packaging Bag The design structure of flat bottom packaging bag usually includes the following key parts: Five-sided structure: the flat bottomed bag consists of a flat bottom and four sides, forming a stable three-dimensional shape. Bottom support design: the flat bottom design allows the bag to stand upright, which improves the display effect of products and enhances the bearing capacity of the bag. Sealing port design: zipper, heat sealing, self-adhesive sealing and other sealing methods can be selected to meet the storage needs of different products. Enhance the exhibition area: the five-sided printable design provides a larger publicity space for the brand, which is convenient for displaying product information and visual elements. Material Selection of Flat Bottom Packaging Bag The material of flat bottom packaging bag is usually selected according to the purpose and product characteristics. The following are several common materials and their characteristics: Composite plastic film Features: Lightweight, tough, waterproof and moisture-proof. Application: snacks, pet food, etc. Aluminum foil composites Features: excellent barrier performance, moisture-proof, light-proof, oxidation-proof, and extended product shelf life. Application: coffee, tea, high-end food, etc. Kraft paper composites Features: Environmental protection, durability, natural appearance and good strength. Applications: nuts, baked goods, organic products, etc. Biodegradable materials Features: strong environmental protection, easy degradation, suitable for fields with high environmental protection requirements. Application: Organic food, green consumer goods. Through the flexible combination of materials, the flat bottom packaging can achieve many functions such as moisture-proof, oxidation-proof, tear-resistant and so on, and meet the packaging needs of different products. Advantages of Flat Bottom Packaging Bag High space utilization rate The square shape of flat bottomed bags can make full use of shelves and storage space, which is suitable for stacking and storage, and improves logistics efficiency. Good display effect The vertical design makes the product more stable and eye-catching on the shelf, attracting consumers' attention. Strong sealing performance Adopt high-quality sealing structure to ensure the freshness and safety of the contents, which is suitable for products that need long-term storage. Easy to use A variety of sealing designs (such as zipper and self-opening) are convenient for consumers to open and reuse, and improve the user experience. Brand promotion advantages A large area of flat bottom packaging surface provides sufficient space for product information display and brand promotion, which helps enterprises to enhance their market competitiveness. Rich environmental protection options By using bio-based or degradable materials, flat bottom packaging meet the needs of sustainable development and green consumption. Challenges and Countermeasures of Flat Bottom Pouch Cost pressure The application of high-performance materials and environmental protection technology increases the production cost, but the cost can be gradually reduced through large-scale production and technical improvement. The production process is complicated. The multi-faceted structure of flat bottom packaging increases the complexity of production technology, which requires enterprises to invest in advanced production equipment and process research and development. The recycling system is not perfect Although environmental protection materials are being popularized, the classification and recycling system of waste packaging still needs to be improved to ensure the recycling of resources.