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Factors influencing file bag load-bearing capacity
更新时间：2025-11-21人气：55
There are 4 core factors affecting the load-bearing capacity of file bags: material properties, process quality, structural design, and service environment. Details are as follows: 1. Material Properties: The Fundamental Guarantee for Load-Bearing - Material purity: High-quality new PP material has a regular molecular structure, offering better strength and toughness. Recycled or mixed materials, with more impurities, show a significant drop in load-bearing capacity. - Thickness specification: For the same material, greater thickness (commonly 0.1-0.25mm) means a higher load-bearing limit. Overly thin materials are prone to stretching and tearing. - Material modification: Modified PP materials added with reinforcing agents and anti-aging agents have better tensile and fatigue resistance, along with stronger load-bearing stability. 2. Process Quality: Determines Force Transmission Effect - Heat-sealing process: Precise control of temperature and pressure at the seams enables molecular-level fusion, making the seam strength close to that of the material itself. Weak sealing, bubbles, or overly narrow seams can cause cracking under stress. - Cutting precision: Neatly cut edges without burrs prevent tearing from rough edges under force. Skewed cutting leads to uneven stress distribution, reducing load-bearing capacity. 3. Structural Design: The Key to Distributing Stress - Handle design: The width (recommended ≥2cm), thickness (thickened versions preferred), and position of handles are crucial. Wide and thick handles can disperse tensile force, avoiding local breakage. - Bottom structure: Flat or three-dimensional bottom designs disperse weight better than ordinary flat bottoms, resisting collapse under load. Thickened bottoms enhance load-bearing stability. - Overall structure: Rounded corner design eliminates stress concentration, reducing the risk of corner damage. A regular bag shape without design flaws (such as local thinness or unreasonable splicing) is essential. 4. Service Environment: Short-Term Impact on Load-Bearing Performance - Temperature conditions: Low temperatures (below -10℃) make PP material brittle, prone to breaking under load. High temperatures (above 60℃) soften the material, reducing its strength and load-bearing capacity. - Force application method: Vertical lifting (stress on handles) is more stable than diagonal or side pulling. Sudden pulling or dropping instantly increases impact force, exceeding the normal load-bearing range.
