Plastic mesh bags, governed by the Chinese industry standard QB/T 3810-1999, provide a comprehensive framework for the production and quality control of these widely used packaging materials. This standard outlines product classifications, technical specifications, testing procedures, inspection rules, and marking requirements for plastic mesh bags. It also covers packaging, transportation, and storage conditions to ensure the integrity and usability of the final product.
The standard applies specifically to mesh bags manufactured primarily from polypropylene or polyethylene resins. These materials are processed through extrusion, drawing into flat yarns, and subsequently woven into the final mesh structure. The standard ensures that such products meet certain performance criteria, including tensile strength, tear resistance, and durability, making them suitable for a variety of industrial and commercial applications.
By following this standard, manufacturers can guarantee consistent quality and reliability in their plastic mesh bag products, which are commonly used for packaging agricultural goods, construction materials, and other bulk items. The standard serves as a reference for both domestic and international trade, helping to maintain uniformity and safety across the supply chain.
Test Weight Water Bags
Test Weight Water Bags are also called water weights, load test water bags, lifting water bags, etc. A weighing water bag is mainly used in ship cranes, shipyard cranes, port cranes, offshore platform cranes, gantry cranes, driving cranes, davits, etc., lifting equipment for load detection. It is more efficient, safer and cheaper to detect than traditional solid weights.
â— High-frequency welding is used to make the DOING Load Testing Water Bags, and its outside is wrapped in high-strength fiber slings.
◠Crane Water Bags are made of high-density composite materials (PVC, TPU) with superior sealing and corrosion resistance. It can be used at -30°C to 70°C, and it will not be unable to use normally due to seasonal changes. The material is reinforced with anti-freezing, anti-oxidation, and anti-ultraviolet properties. It is not affected by seawater, chemicals, agents, oil stains, acid and alkali and aquatic organisms.
â— Water Bags for Weight can be folded during transportation, which greatly reduces space. Simple operation, light weight, small size, economical and practical, and long service life.
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