What are the packaging bag formats for Powder Packaging Machine?
Monday August-04 2025 14:37:46
Powder packaging machines use a variety of packaging bag formats, depending primarily on the powder's characteristics and packaging requirements. Powder materials exhibit characteristics such as fluidity, hygroscopicity, and varying particle sizes. Some are also corrosive or easily oxidized, placing high demands on the bag's sealing, moisture resistance, strength, and durability. Small-format packaging, such as three-side seal bags and four-side seal bags, with capacities ranging from 5 to 200 grams, are commonly used for retail packaging of food powders. Large-format packaging, such as stand-up pouches and gusseted bags, with capacities ranging from 200 to 5,000 grams, are primarily used for bulk storage and transport of chemical and pharmaceutical powders. These bag types meet the packaging needs of various powder products, such as food, chemical, and pharmaceutical powders.
What are the packaging bag formats for Powder Packaging Machine?
What are the packaging bag formats for powder packaging machines? The following summarizes several key factors regarding packaging bags: bag material, bag shape, packaging capacity, packaging dimensions, and applicable materials.
Three-side-seal bags: Made from composite film materials such as PET/PE, PET/AL/PE, and NY/PE, these bags offer excellent moisture and oxygen barrier properties. They are heat-sealed on three sides, leaving one side open for filling. Typical packaging capacities range from 50g to 500g. Package dimensions are customized based on product volume, typically ranging from 80-200mm in width and 100-250mm in height. They are suitable for packaging small-volume, high-value-added powders such as milk powder, coffee powder, pesticide powder, and seasoning powder.
Back-seal bags: Made from materials such as BOPP/PE and PET/PE, these bags are suitable for high-speed bag making and heat-sealing. These bags feature a center-seal back with natural hems on both sides. Capacities range from 10g to 1000g, and dimensions range from 60-180mm in width and 80-300mm in height. They are suitable for packaging medium-flowing powders such as laundry detergent, veterinary drug powder, and feed additives.
Four-side-seal bags: Made from a PET/AL/PE structure, these bags offer excellent barrier properties. These bags are sealed on all four sides and have a regular shape. They typically hold 10g to 300g. Custom sizes are often available, with 120mm x 160mm being a common option. They are suitable for high-end fine powder products such as traditional Chinese medicine powders, facial mask powders, and special additive powders, which require a high degree of sealing and light protection.
Stand-up pouches: Made from PET/AL/NY/PE or paper-aluminum composite film, they offer stiffness and excellent barrier properties. These bags feature a folded bottom for upright display, and some are equipped with zippers. Capacities range from 100g to 2kg, with package sizes ranging from 100mm to 250mm in width and 150mm to 350mm in height. They are suitable for large-volume packaging for home or commercial use, such as protein powder, flour, baking ingredient powder, and industrial filler powder.
Gusseted pouches: Made from materials such as PET/PE, PET/AL/PE, and kraft paper composite bags. The bag has gusseted sides to increase the bag's capacity and make it suitable for stacking. The packaging capacity ranges from 500g to 5kg, and the packaging size is customized based on the weight of the material and the stacking method. It is suitable for bulk products such as rice flour, animal feed powder, and chemical building material powder, where both cost and load-bearing requirements are prioritized.
What is the sealing technology used in powder packaging machines?
The sealing technology used in powder packaging machines is crucial to packaging quality. Common technologies include: heat sealing, which fuses the bag opening using a heated pressure head and is suitable for heat-sealable films such as PE and CPP; impulse sealing, which uses a hot wire at a momentary high temperature and is suitable for thick films or heat-sensitive materials; ultrasonic sealing, which is suitable for environmentally friendly new materials or aluminum foil bags and provides a smooth and secure seal; and vacuum and nitrogen sealing, which is required for some high-end powder products to maintain freshness and prevent moisture and oxidation.
References for Selecting Bags for Powder Packaging Machines
When selecting a bag, consider that some powders are best suited to specific bags. For example, powders with poor flowability, such as milk powder, are suitable for stand-up pouches, while powders with good flowability, such as starch, can be used in three-side-seal bags. Moisture-sensitive powders, such as protein powder, require aluminum-plastic composite film. Oxidizable powders, such as vitamins, are recommended for vacuum or nitrogen packaging. The packaging bag must be compatible with the machine's film roll and heat-sealing system. Excessive thickness can affect the seal, while too thin can easily break. High-speed machines require high-strength films such as BOPP/CPP. Vertical machines use back-seal bags, while pillow machines use four-side-seal bags. Zippered stand-up pouches are an option for high-value-added products (such as health supplements). Large packages (such as 25kg of cement) require woven bags reinforced with PE liners. Moisture- and UV-resistant materials are recommended for long-distance transportation, balancing cost and performance.
Powder packaging machines can produce a variety of bag formats, from three-side seal, back-seal, and four-side seal bags to stand-up pouches and gusseted bags. Each bag type has its own unique structural advantages and application scenarios. By selecting the right material, capacity, size, and sealing technology, you can not only improve packaging efficiency and product quality, but also help your brand stand out in the market. Powder packaging solutions provide superior packaging services for powder products in various industries. Enterprises should choose the most suitable packaging form based on the characteristics of their products to ensure product quality and enhance market competitiveness.
