When choosing or customizingwaterproof tarpaulinAt that time, we often hear merchants say 'quality meets standards', but what exactly are the standards met? As a professional purchaser or user, understanding national and industry standards is key to safeguarding rights and ensuring the safety of goods. At present, the standard specifications for waterproof tarpaulins in China are mainly divided into national standards (GB) and packaging industry standards (BB). The following is a detailed interpretation for you.
1. Core standards: GB/T 16741 and BB/T 0037
The core standard for waterproof tarpaulin is "Double sided coated polyvinyl chloride flame retardant waterproof cloth and tarpaulin".
Early national standard GB/T 16741-1997: This standard specifies the technical requirements for coated fabrics and tarpaulins made of fabrics such as vinylon fiber, nylon fiber, polyester fiber, etc., coated with polyvinyl chloride resin on both sides. It covers basic requirements such as product type, specifications, flame retardant performance, and testing methods, and is an important basis for early product quality judgment.
Current industry standard BB/T 0037-2012: This is the more commonly used standard in the industry, replacing the old versions of GB/T 16741 and BB/T 0037-2006. This standard further refines the classification and indicators of products:
Classification: Coated fabrics are classified into six categories, A-F, based on their tensile strength; Tarpaulins are divided into Type I (sewn edging) and Type II (heat sealed edging) according to the edging process.
Physical properties: Clear requirements have been made for unit area mass deviation, tensile strength, tear strength, low temperature resistance, water penetration resistance, etc.
Flame retardant requirements: For scenarios with flame retardant requirements, the standard specifies the testing method for combustion performance (such as oxygen index method).
2. Textile industry standard: FZ/T 14009-2005
In addition to PVC coated cloth, there are also vinylon dyed waterproof canvas products on the market, which follow the standard of "Vinyl dyed waterproof canvas for canopy" (FZ/T 14009-2005). This standard is issued by the China National Textile and Apparel Council and mainly focuses on the physical indicators of textile fabrics, applicable to traditional canvas materials.
3. Interpretation of core quality indicators
When referring to the above standards, it is recommended to focus on the following key indicators, which directly determine the durability of the tarpaulin:
Waterproof grade: the waterproof grade of high-quality PVC tarpaulin can reach more than 3000mmH2O, which can resist rainstorm and extreme weather.
Tear strength: The standard specifies the tear strength in the warp and weft directions. High quality products are usually made of PVC+polyester industrial yarn material, which increases the tear strength by more than 40%.
Weathering resistance (anti-aging): by adding anti ultraviolet components, the standard requires that the materials will not be brittle under long-term exposure and will not crack under low temperature. The anti-aging performance of high-quality products can be improved by more than 50%, and the service life can reach 3-5 years.
Unit area mass: also known as "grammage", commonly ranging from 400g-900g/㎡. Generally, the higher the grammage, the thicker the thickness, and the better the durability.
4. Selection suggestions
When purchasing, do not only look at adjectives such as "thickened" and "waterproof", but also require suppliers to provide quality inspection reports that comply with BB/T 0037-2012 or corresponding national standards. At the same time, pay attention to the product's edge wrapping process (whether it is heat sealing or sewing), anti rust treatment of metal buttonholes (nickel plated brass or galvanized steel is better than ordinary iron), and the material of the rope (nylon rope is better than polypropylene rope), which are all quality details implied in the standard specifications.
