1. Diverse materials
Plastic materials: Common ones include polyethylene (PE), polypropylene (PP), etc. PE material is soft and has good toughness, with certain moisture resistance, suitable for powder materials that do not require particularly high moisture resistance, such as some powder additives used in construction; PP material has good heat resistance and chemical stability, and can withstand a certain degree of acid-base corrosion. It is commonly used in powder raw material packaging in the chemical industry.
Paper material: High strength paper such as kraft paper is generally used, which has certain moisture-proof and leak proof properties after special treatment. Paper feeding bags have relatively low costs, are recyclable, and environmentally friendly. They are commonly used in industries such as food and feed that require high hygiene standards and the materials themselves are not easily affected by moisture and deterioration.
Composite material: Combining the advantages of various materials, such as aluminum foil composite material, which is composed of aluminum foil and plastic film, it has excellent barrier properties and can effectively prevent the erosion of powder materials by moisture, oxygen, and light. It is particularly suitable for pharmaceutical powders, fine chemical powders, etc. that require strict storage conditions.
2. Reasonable structural design
Bag mouth design: Common bag mouth forms include valve mouth bag mouth, open mouth bag mouth, etc. When feeding, the valve bag mouth allows materials to quickly and accurately enter the container from the valve through specialized filling equipment. After feeding, the valve automatically closes, effectively preventing material leakage and dust flying; An open bag opening facilitates manual dumping of materials and is relatively simple to operate, but additional dust prevention measures may need to be taken during the feeding process.
Bag body structure: Many powder chagring bag adopt a three-dimensional square or circular bottom design, which makes the bags more stable when stacked, less prone to tipping, and also facilitates placement and fixation on feeding equipment, improving feeding efficiency. In addition, some feeding bags are also equipped with handles or straps on the bag body for easy handling.
3. Good sealing performance
Powder chagring bag are sealed using various techniques such as heat sealing, glue sealing, etc. to ensure the sealing of the bag mouth and body, prevent leakage of powder materials during storage and transportation, avoid environmental pollution, and ensure that the quality of materials is not affected by external factors. For example, for some powder materials that are prone to moisture and clumping, good sealing can effectively isolate moisture in the air and extend the shelf life of the material.