FRP tank quality decision 3 factors

Factors affecting the quality of glass fiber reinforced plastic tanks, in addition to glass fiber and resin these two components, the interface is also very important. These three elements are indispensable, and they are closely related and indivisible. We call them three elements, which is summed up in the long practice.

First, the synthetic resin is to determine the quality of glass fiber reinforced plastic base material, loose glass fiber by its bonding as a whole, mainly from the role of transmission stress, so the quality of FRP tank strength plays an important role, especially the compression, bending, , Shear strength is more significant. Resin content on the performance of glass steel tank also has an impact, usually resin content of 20% -35%, which and molding methods, enhance the variety of materials related. For example, winding and molding, resin content is low, while the hand paste molding, resin content is slightly higher. Strength layer resin content is slightly lower, usually between 25% -40%; corrosion-resistant, impermeable layer of resin content is higher, generally more than 50% with glass cloth as a reinforcing material, resin content is lower than with glass felt. With glass fiber mat as a reinforcing material, up to 85% of the resin-rich content. The same time as
In addition, the resin is to determine the glass steel tank quality of the matrix material, it is the glass fiber reinforced plastic elastic modulus, heat resistance, electrical insulation, electrical permeability, chemical resistance, weather resistance, aging resistance and so have an impact. For example, glass fiber reinforced chemical resistance and water resistance, mainly depends on the performance of resin matrix. Usually unsaturated polyester resin 197 # chemical resistance is better, and 1289 # better water resistance. Different types of different grades of resin its performance is not the same.

Second, the glass fiber is the main part of the quality of glass steel tank, it can not only improve the strength and elastic modulus of FRP, but also to reduce shrinkage deformation, improve the heat distortion temperature and low temperature impact strength. Such as 306 # polyester resin castings, after adding 50% glass cloth. The tensile strength can be increased from 50MPa to 200MPa, the tensile modulus can be increased from 3.9GPa to 14GPa.

Third, the interface: the so-called interface is any two-phase material between the interface. The quality of the FRP tank is not only related to the reinforcing material and synthetic resin used, but also to the extent that the interface between the fiber and the resin is very good and durable.

As we all know, glass fiber is a cylindrical glass, the surface is also as smooth as glass, and the surface is often firmly adsorbed with a thin layer of water film, which of course to affect the glass fiber and resin bonding properties. In particular, glass fiber in the process of drawing silk, in order to achieve the cluster, lubrication, to eliminate static electricity and other purposes, often coated with a layer of infiltration agent, this type of infiltration of paraffin-like substances, they remain in the glass fiber surface, the synthetic resin And glass fiber from the isolation, hinder the two bonding. Visible interface on the performance of glass fiber a great impact.
The same time as
Interface problems need to be addressed. Such as in the glass fiber surface covered with a layer of surface treatment agent, so that glass fiber and resin can be firmly bonded together. This method is to improve the quality of FRP tank is very effective way, both at home and abroad are vigorously research and use. It has been proved that glass fiber and its fabric have not only improved the wear resistance, water resistance and electrical insulation performance of glass fiber after the treatment with surface treatment agent, but also improve the strength of FRP tank quality, especially in wet condition The

In addition, fiberglass and other materials or fiberglass itself has many layers of paste, etc. also have interface problems. For example, to the metal tank layer to do FRP anti-corrosion paste, you need to clean the surface of the metal cans, such as removal of dirt, oil, water and rust layer, often used sandblasting, pickling and other treatment. If the metal surface treatment is not good, FRP paste will fail. Sometimes, will encounter a solidified glass fiber reinforced plastic layer, and then bonding glass fiber reinforced plastic, there will be interface problems. Such as the use of layered curing process or FRP damage repair, etc., need to be treated on the surface of glass fiber reinforced plastic, remove dirt, oil, water, etc., but also the need to make the surface with sandpaper to increase the paste area, otherwise, there will be Layered flaws.
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