How does the sealing of center-sealed three-dimensional bags ensure product safety?
Publish Time: 2025-03-05
In the modern packaging industry, center-sealed three-dimensional bags, as a common form of packaging bags, have been widely used in many fields with their unique three-dimensional structure and good sealing performance. Whether it is food, medicine, chemical or electronic product packaging, center-sealed three-dimensional bags play a vital role. And ensuring its sealing is the key to ensuring product safety, extending shelf life, and preventing pollution and loss.
1. Sealing principle of center-sealed three-dimensional bags
The sealing of center-sealed three-dimensional bags mainly depends on its sealing process and material selection. The sealing part usually adopts heat sealing, ultrasonic sealing or other physical sealing methods to tightly connect two or more parts of the bag body to form a complete sealed space. At the same time, the bag material itself should also have good barrier properties to prevent external factors such as oxygen, moisture, humidity, odor, etc. from penetrating into the bag and affecting product quality.
2. Key measures to ensure tightness
Choose appropriate bag materials: There are many types of materials for center-sealed three-dimensional bags, including polyethylene (PE), polypropylene (PP), polyester (PET), aluminum foil composite film, etc. When selecting materials, materials with appropriate barrier properties, strength, flexibility and heat resistance should be selected according to the characteristics of the product and storage conditions. For example, for products that need to be moisture-proof and anti-oxidation, aluminum foil composite films with good barrier properties should be selected.
Optimize the sealing process: The sealing process is one of the key factors affecting the tightness of the center-sealed three-dimensional bag. During the sealing process, the parameters such as sealing temperature, pressure and time should be set reasonably to ensure that the sealing is firm, flat, free of bubbles and wrinkles. At the same time, the sealing machine should also be regularly maintained and calibrated to ensure its stable and reliable performance.
Strict quality inspection: During the production process, the center-sealed three-dimensional bag should be strictly inspected for quality, including appearance inspection, size measurement, and tightness test. The sealing test usually uses methods such as pressure decay method, gas leakage method or water immersion method to detect whether there is air leakage in the bag.
Reasonable storage and transportation: Center-sealed three-dimensional bags should be protected from moisture, heat, pressure and mechanical damage during storage and transportation. The storage environment should be kept dry, ventilated and light-proof. Shockproof and pressure-proof measures should be taken during transportation to ensure the integrity and sealing of the bag.
3. The importance of sealing to product safety
Good sealing can effectively prevent external factors from polluting and damaging the product, thereby ensuring the quality and safety of the product. For sensitive products such as food and medicine, sealing is directly related to the health and safety of consumers. Therefore, when designing and producing center-sealed three-dimensional bags, sealing should always be considered as one of the primary considerations.
In summary, the sealing of center-sealed three-dimensional bags is of great significance to ensure product safety. By selecting appropriate bag materials, optimizing sealing technology, strict quality inspection and reasonable storage and transportation measures, the sealing performance of center-sealed three-dimensional bag can be ensured to be optimal, providing strong guarantee for product quality and safety.
