According to different products, customs specification declarations have different declaration elements. Special attention should be paid to: if the declaration is sliver, roving, yarn and chopped fiber, the product name, material (made of fiberglass), type and length need to be declared; If it is declared as a woven fabric, it is also necessary to declare the weaving method (woven), yarn type (spun yarn, etc.), width, weight per square meter, single yarn fineness, etc.For example: the standard declaration elements of tax code 7019.5200 are: 1. Product name; 2. Material (made of fiberglass); 3. Weaving method (woven); 4. Yarn type (spun yarn, etc.); 5. Width; 6. Each Square meter weight; 7. Single yarn fineness; 8. Nominal thickness.The accurate declaration of the product "fiberglass cloth" is: fiberglass filament woven cloth for copper-clad laminates, width 50 cm, gram weight per square meter 150, single yarn fineness 120 tex, nominal thickness 2mm.

1, used for epoxy resin wetting faster, good overmolding, very easy to remove the vapor bubble.2, and the adhesive all over the proportion, no hair feathers, dirt and other defects.3, glass fiber short-cut felt crafts with high impact toughness, wet compressive strength stability rate is high.4, with high compressive strength, reduce the production process of tearing conditions.5、The surface of the laminate is smooth and clean, with good light transmittance.6, thin and thick, no dirt and other defects.7, moderate strength, easy to thoroughly wet, crafts bubble less.8, rapid wetting rate, good process performance, good erosion resistance of plant fiber.9, with excellent physical properties of mechanical equipment.But long-term touch of fiberglass mat will be irritating respiratory system, resulting in respiratory diseases. Immediate touching of the skin will also cause allergic reactions, more serious skin diseases. Glass fiber felt into the stomach will cause malignant tumors. Therefore, the actual operation of manufacturing must wear technical professional protective masks, rubber gloves and sleeve covers to prevent the skin from touching the fiberglass mat immediately.

In the "Tariff Code", fiberglass slivers, rovings, yarns and chopped fibers are in the same first-level subheading, and three tax numbers are split under it: 7019.1100 is chopped fibers with a length not exceeding 50 mm; 7019.1200 is Roving; slivers, yarns and chopped fibers with a length greater than 50 mm are classified into 7019.1900.According to the "Commodity and Item Notes on Import and Export Tariffs", "chopped fiber" is a product made by cutting many juxtaposed long fiberglass strands into short pieces.Therefore, please pay attention to the distinction. Not all "chopped fibers" are in tax code 7019.1100. Depending on the length, they may be classified into tax code 7019.1900. Not all "long fibers" are rovings either. Only long untwisted fiber raw silk is classified into tax code 7019.1200, and slivers, yarns, etc. that have been reprocessed from raw silk are classified into tax code 7019.1900.

The main characteristics of glass fiber composite material:1. Excellent mechanical properties. The tensile strength of glass fiber composites is lower than that of steel and higher than that of ductile iron and concrete, while the specific strength is about 3 times that of steel and 10 times that of ductile iron.2. Good corrosion resistance. Through a reasonable selection of raw materials and scientific thickness design, glass fiber composite materials can be used in acid, alkali, salt, and other organic solvent environment for a long time3. Good thermal insulation performance. Glass fiber composite material has the characteristics of low thermal conductivity, and is an excellent insulation material, therefore, in the case of a small temperature difference, it does not need to do special insulation, can achieve a good insulation effect.4. Low thermal expansion coefficient. Because the thermal expansion coefficient of glass fiber composite material is small, it can be used normally under various harsh conditions such as surface, underground, seabed, high cold, desert, and so on.5. Excellent electrical insulation. It can be used to make insulators. It can still maintain good dielectric properties at high frequency. Microwave transmission is good, and suitable for use in power transmission and minefields.The development trend of glass fiber composite materials is as follows:1. At present, the development potential of high-performance glass fiber is huge, especially the advantages of high silicon glass fiber, high-performance glass fiber has two development trends: one is to focus on higher performance, and the second is to focus on industrial technology research of high performance glass fiber, and is committed to improving the process performance of high performance glass fiber, while reducing costs and reducing pollution.2. There are some shortcomings in the material preparation: the preparation of some high-performance glass fibers still has the problems of glass crystallization, high filament density, high cost, and can not meet the requirements of strength in some special uses. When the thermosetting resin is used as the matrix, the prepared composite material has difficulties in secondary processing and recycling, which can only be processed by cutting, and the recovery can only be corroded by special chemical solvents and strong oxidants, and the effect is not ideal. Although a degradable thermosetting resin has been developed, the cost problem still needs to be controlled.3. In the process of glass fiber synthesis, a new type of glass fiber composite material is prepared by various synthetic technologies. In recent years, to meet the needs of various special conditions, various surface technologies have been developed for special modification of glass fiber surface.4. In the coming period, the global market demand, especially the demand of emerging market countries, will maintain a high growth rate, and the advantages of industry leaders will become more obvious, such as China's glass fiber enterprises represented by Boulder Group will play a leading and leading role in the future global glass fiber industry. Fiberglass composite material has become one of the main raw materials in the automotive industry, fiberglass thermoplastic material because of its good economy and good recyclability, the application has a growing trend, at this stage, the widely used fiberglass thermoplastic reinforcement material application range includes instrument panel bracket, front end bracket, bumper and engine peripheral components, The coverage of most parts and sub-structural parts of the whole vehicle is realized.5. In addition to several large glass fiber production bases, small and medium-sized enterprises account for 35% of China's glass fiber industry output, most of them have single varieties, weak technology, and occupy more than 90% of the total number of employees, limited resources, poor management level of business risk, which is the focus and difficulty of the implementation of strategic changes in the industry. We should actively support and guide small and medium-sized enterprises to take the road of coordinated development, and strengthen cooperation and competition with the outside world through the formation of small and medium-sized enterprise groups to achieve the purpose of development. With the mutual penetration of the economy, the competition between enterprises is no longer fighting alone, but showing cooperation and joint.